CN101039297A - Method and system for mapping virtual resource block to physical resource block - Google Patents

Abstract

A mapping method from virtual resource block to physical resource block, which includes steps: User terminal sends CQI report. Network sends the number of distributed virtual resource blocks. Network sends user data. User terminal estimates the number of distributed virtual resource blocks and the proportion of the number of distributed virtual resource blocks to the number of physical resource blocks to determine the mapping position to physical resource blocks from distributed virtual resource block and local virtual resource block. User terminal receives its data from at least one sub-carrier wave at the location in the physical resource block computed in step (d). The present invention can further improve diversity gain of distributed transmission, thus to improve system performance.

Description

Method and system for mapping virtual resource blocks to physical resource blocks

technical field

The invention relates to a mobile wireless communication system, in particular to a method and system for mapping virtual resource blocks to physical resource blocks in an OFDM system.

Background technique

At present, the 3GPP (The 3rd Generation Partnership Project) standardization organization has begun to carry out long-term evolution (LTE-Long Term Evolution) of its existing system specifications. Among the many physical layer transmission technologies, Orthogonal Frequency Division Multiplexing (OFDM-Orthogonal Frequency Division Multiplexing) technology has become a promising one among all downlink solutions due to its high spectrum utilization and low processing complexity. kind.

OFDM technology is essentially a multi-carrier modulation communication technology. Its basic principle is to decompose a high-rate data stream into several low-rate data streams and transmit them simultaneously on a group of mutually orthogonal sub-carriers. OFDM technology has performance advantages in many aspects due to its multi-carrier nature. (1) A significant advantage of OFDM technology is that due to the parallel transmission of data on multiple subcarriers, the length of symbols on each subcarrier increases accordingly, which is not sensitive to channel delay; by further adding a guard interval to each symbol , that is, the introduction of a cyclic prefix (CP, Cyclic Prefix), when the channel delay is less than the length of the cyclic prefix, the inter-symbol interference (ISI) can be completely eliminated. In this way, each subcarrier experiences a flat fading channel. (2) The spectrum utilization rate of OFDM technology is high, and OFDM signals actually overlap in the frequency domain, which greatly improves the spectrum utilization rate. (3) OFDM technology has a strong ability to resist narrow-band interference and frequency selective fading. Through channel coding and interleaving, OFDM can have frequency diversity and time diversity functions, thus effectively combating narrowband interference and frequency selective fading. (4) OFDM technology modulation can be realized through baseband IFFT transformation, and IFFT/FFT has a mature and fast calculation method, which can be easily realized in DSP chip and hardware structure.

In the OFDM wireless transmission system, there are two transmission modes: a localized (Localized) transmission mode and a distributed (Distributed) transmission mode.

The so-called partial data transmission means that data transmission is transmitted on continuous subcarriers on local sub-bands, and the network side will specify an effective modulation and coding method for the data transmission between the base station and the user equipment according to the quality of the channel between the base station and the user equipment. Adaptive modulation and coding, thereby improving the throughput of data transmission. In the distributed transmission mode, the user equipment uses discontinuous sub-carriers for transmission, thereby obtaining frequency diversity gain. Usually the partial data transmission mode can use adaptive coding modulation and frequency scheduling, and its transmission gain is relatively large, but for some situations where the channel changes rapidly, the channel situation predicted at a certain moment cannot reflect the channel situation at the next moment, so Localized transfers are difficult to apply. In this case, distributed data transmission is often used to transmit data by utilizing the gain of frequency diversity.

In the discussion of 3GPP physical layer design, the allocation of physical resources is one of the hot issues discussed, that is, how to map information bits after channel coding, interleaving, and data modulation to OFDM time-frequency symbols. OFDM symbols can be organized into some physical resource blocks (physical resource blocks), and a physical resource block is composed of M consecutive subcarriers in N consecutive OFDM symbols. The granularity of resource allocation should match the minimum load, and the characteristics of channel adaptation in the frequency domain should also be considered. Currently, the size S _PRB of a physical resource block is tentatively scheduled to be MxN, where M=25, and N is equal to the length of an OFDM symbol in a subframe (here, to simplify the description, the positions occupied by pilot symbols and control signaling are ignored). Table 1 describes the physical resource block bandwidth and the number of physical resource blocks under various bandwidths.

Table 1. Physical resource block bandwidth and number of physical resource blocks under various bandwidths Bandwidth (MHz) 1.25 2.5 5.0 10.0 15.0 20.0 Physical resource block bandwidth (kHz) 375 375 375 375 375 375 number of physical resource blocks 3 6 12 twenty four 36 48

Whether M can have other values, for example, M=15 or M=12 or M=10 or other values of M can be considered according to research on interference coordination.

The concept of virtual resource blocks is defined in 3GPP TR25.814. A virtual resource block has the following characteristics:

Size: in units of time-frequency resources;

Type: localized (Localized) transmission mode or distributed (distributed, orscattered) transmission mode.

Localized virtual resource blocks are mapped to physical resource blocks in a localized manner, and distributed virtual resource blocks are mapped to physical resource blocks in a distributed manner. The specific mapping relationship from virtual resource blocks to physical resource blocks is currently to be determined.

The size of the localized virtual resource block is represented by S _VL , the size of the distributed virtual resource block is represented by S _VD , and the size of the physical resource block is represented by S _PRB . All localized virtual resource blocks have the same size, and the size S _VD of the distributed virtual resource block may be the same as or different from the size of the localized virtual resource block. The relationship between S _PRB , S _VL and S _VD is to be determined. For the convenience of research, it is assumed in the present invention that the size of the distributed virtual resource block is the same as that of the localized virtual resource block.

Localized transmission and distributed transmission are frequency division multiplexed (FDM) within a subframe.

After virtual resource blocks are mapped to physical resource blocks, the entire transmission bandwidth is a combination of localized transmission and distributed transmission. As shown in Figure 1, a schematic diagram of localized and distributed resource multiplexing is given. In Fig. 1, two physical resource blocks are used for distributed transmission, and the remaining physical resource blocks are used for localized transmission. In this multiplexing mode, a physical resource block is used either for localized transmission or distributed transmission, and localized resources and distributed resources are not multiplexed into one physical resource block. The user terminal in the distributed transmission mode further multiplexes on these two physical resource blocks for distributed transmission, and the user terminal in the localized transmission mode further multiplexes on the remaining physical resource blocks for localized transmission. This localized and distributed resource block multiplexing structure may be changed semi-statically or dynamically (based on each subframe). A user terminal may be allocated multiple virtual resource blocks by the scheduler.

The structure of the above-mentioned localized and distributed resource multiplexing is determined by the network and must be notified to the user terminal. There are many ways to notify such signaling. The more direct way is to use bit-mapping, which is to use a 0 or 1 bit sequence with a length of l (l is equal to the total number of physical resource blocks) to indicate Whether each physical resource block is used for distributed transmission or localized transmission. The sequence from left to right is bit 0, bit 1, ..., bit l-1. The i-th bit of the sequence indicates the mapping situation of the i-th physical resource block (i=0, 1, 2, . . . , l-1). 1 can be used to indicate that the physical resource block is used for distributed transmission, and 0 can be used to indicate that the physical resource block is used for localized transmission. Of course, 0 can also be used to indicate that the physical resource block is used for distributed transmission, and 1 can be used for Indicates that the physical resource block is used for localized transmission, and the sending and receiving ends must have the same agreement. In the present invention, 1 is used to indicate that the physical resource block is used for distributed transmission, and 0 is used to indicate that the physical resource block is used for localized transmission. As shown in FIG. 2 , an example is given in which there are 12 physical resource blocks, 10 physical resource blocks for localized transmission, and 2 physical resource blocks for distributed transmission. It can be seen that the method of bit mapping indicates that the multiplexing bit overhead of localized and distributed resources is equal to the total number of physical resource blocks. When the system bandwidth is 5MHz, the physical resource block is 12, and the signaling indicates that the bit overhead is 12 bits. When When the system bandwidth is 20 MHz, the number of physical resource blocks is 48, and the signaling indication bit overhead is 48 bits. It can be seen that the bit overhead is proportional to the number of physical resource blocks when the bit mapping method is used to indicate the multiplexing of localized and distributed resources.

In order to reduce the signaling bit overhead, Ericsson and Motorola proposed another calculation-based method to indicate the multiplexing of localized and distributed resource blocks. See R1-060095 and R1-060400. The basic idea is that the number of distributed virtual resource blocks is known, and the position of the physical resource blocks occupied by the distributed transmission can be calculated according to the predetermined mapping formula. The rest of the physical resource blocks Used for transmission of localized virtual resource blocks. The network can calculate the positions of physical resource blocks used for distributed transmission and localized transmission according to the predetermined mapping formula, so as to use these physical resource blocks to perform distributed or localized transmission of data. In order to enable the user terminal to calculate the position where the distributed virtual resource block is mapped to the physical resource block, the network side needs to send the number of distributed virtual resource blocks. The user terminal can calculate the position where the distributed virtual resource block is mapped to the physical resource block and the position where the localized virtual resource block is mapped to the physical resource block according to the number of distributed virtual resource blocks sent by the network according to the predetermined mapping formula, And receive the data of distributed transmission and local transmission in these physical resource blocks. In this calculation-based method, the design of the mapping formula will directly determine the effect of frequency diversity.

Next, N _DVRB is used to represent the number of distributed virtual resource blocks, N _LVRB is used to represent the number of localized virtual resource blocks, and N _PRB is used to represent the number of physical resource blocks. In the schemes of Ericsson and Motorola, the given mapping formula is specifically designed. Ericsson's program in $N_{\mathrm{DVRB}}>\frac{{\mathrm{<figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">N</figure-callout>}}_{\mathrm{PRB}}}{2}$ When , all distributed resources are concentrated in the front part of the physical resource block, and the diversity gain is not good. So Motorola came up with another mapping method, but this method is in $N_{\mathrm{DVRB}}<\frac{{\mathrm{<figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">N</figure-callout>}}_{\mathrm{PRB}}}{2}$ When , there will be two consecutive physical resource blocks allocated to distributed resources, so that the diversity gain is not optimal, even in $N_{\mathrm{DVRB}}>\frac{{\mathrm{<figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">N</figure-callout>}}_{\mathrm{PRB}}}{2}$ When , there is room for further improvement of diversity gain. Therefore, the present invention proposes another calculation-based resource mapping method, which can further improve the diversity gain of distributed transmission.

Contents of the invention

The purpose of the present invention is to provide higher frequency diversity gain for distributed transmission, thereby improving system performance.

In order to achieve the above purpose, a method for mapping virtual resource blocks to physical resource blocks includes steps:

a) The user terminal sends a CQI (Channel Quality Indication) report;

b) The number of distributed virtual resource blocks sent by the network;

c) The network sends user data;

d) The user terminal judges the number of distributed virtual resource blocks and the ratio of the number of distributed virtual resource blocks to the number of physical resource blocks to determine the position where the distributed virtual resource blocks and localized virtual resource blocks are mapped to the physical resource blocks;

e) The user terminal receives its own data on at least one subcarrier in the position of the physical resource block calculated in step d).

Description of drawings

Figure 1 is a schematic diagram of multiplexing localized resources and distributed resources;

Figure 2 shows the method of bit mapping to indicate the multiplexing of localized resources and distributed resources;

Fig. 3 is the main flow chart of the present invention;

Fig. 4 is the network operation flowchart of the present invention;

Fig. 5 is a flow chart of user terminal operation of the present invention;

Fig. 6 is the network equipment of the present invention;

Fig. 7 is the user terminal equipment of the present invention;

Fig. 8 is a schematic diagram of multiplexing multiple distributed virtual resource blocks.

Detailed ways

The invention proposes a mapping method from virtual resource blocks to physical resource blocks. Its purpose is to provide higher frequency diversity gain for distributed transmission, thereby improving system performance.

The basic idea of the present invention is to determine the position where distributed virtual resource blocks and localized virtual resource blocks are mapped to physical resource blocks according to the number of distributed virtual resource blocks and the ratio of the number of distributed virtual resource blocks to the number of physical resource blocks . It can be divided into the following two proportional relationships to deal with: one is that the number of distributed virtual resource blocks is less than or equal to one-half of the number of physical resource blocks; the other is that the number of distributed virtual resource blocks is greater than half of the number of physical resource blocks one-third. For proportional relationship 1, the mapping formula for mapping virtual resource blocks to physical resource blocks is optimized; for proportional relationship 2, it can be transformed into case 1 for processing, that is, the position where distributed virtual resource blocks are mapped to physical resource blocks is right The location complement set of the distributed virtual resource block mapped to the physical resource block calculated according to the number of distributed virtual resource blocks complementary to the number of distributed virtual resource blocks. This not only simplifies the design, but also reduces the computational load for calculating the mapping position at the network side and the user terminal.

Provided below is the mapping method of the present invention from virtual resource block to physical resource block, as shown in Figure 3, comprises steps:

301 The user terminal sends a CQI (Channel Quality Indication) report;

302 The number of distributed virtual resource blocks sent by the network;

303 network to send user data;

304 The user terminal judges the number of distributed virtual resource blocks and the ratio of the number of distributed virtual resource blocks to the number of physical resource blocks to determine the position where the distributed virtual resource blocks and localized virtual resource blocks are mapped to the physical resource blocks;

305 The user terminal receives its own data on at least one subcarrier in the physical resource block where it is located obtained in step 304 .

Based on the above steps, the network sends the control signaling of the number of distributed virtual resource blocks and the user data, and the user terminal receives the control signaling of the number of virtual resource blocks, and then receives the user data. The order in which the network sends user data and the user terminal receives the control signaling of the number of virtual resource blocks is related to the propagation delay. If the network sends the control signaling of the number of virtual resource blocks and the user data in the same subframe, and the transmission delay It is very short, so from the perspective of time, the user terminal first receives the control signaling of the number of virtual resource blocks, and then the network sends user data. Of course, these two periods may overlap, or the network sends user data first, and then the user The terminal receives the control signaling of the number of distributed virtual resource blocks or the number of localized virtual resource blocks. So the order of step 303 and step 304 can be reversed.

In step 302, instead of sending the number of distributed virtual resource blocks, the network may send the number of local virtual resource blocks. The number of distributed virtual resource blocks can be calculated by the number of local virtual resource blocks. The number of blocks minus the number of local virtual resource blocks is the number of distributed virtual resource blocks. The number of distributed virtual resource blocks sent by the network may be dynamic or semi-static. If it is dynamic, it can be transmitted by broadcast; if it is semi-static, it can be transmitted by broadcast or high-level signaling.

Network equipment and network operation:

The network operation process of the present invention is as shown in Figure 4, comprises steps:

401 Receive a CQI (Channel Quality Indication) report;

402 sends the number of distributed virtual resource blocks;

403 Send user data, send user data using distributed transmission in the physical resource block to which the distributed virtual resource block is mapped, and send user data using localized transmission in the physical resource block to which the localized virtual resource block is mapped .

In step 403, the position where the virtual resource block is mapped to the physical resource block is determined according to the number of distributed virtual resource blocks and the ratio of the number of distributed virtual resource blocks to the number of physical resource blocks. The proportional relationship between the number of distributed virtual resource blocks and the number of physical resource blocks can be divided into two types: one is that the number of distributed virtual resource blocks is less than or equal to half of the number of physical resource blocks, and the other is that distributed virtual resource blocks The number of blocks is greater than one-half of the number of physical resource blocks. According to these two situations, different methods are used to calculate the positions where the distributed virtual resource blocks and the localized virtual resource blocks are mapped to the physical resource blocks.

In step 403, the position where the virtual resource block is mapped to the physical resource block may be calculated before sending the number of distributed virtual resource blocks or the number of localized virtual resource blocks. After the number of distributed virtual resource blocks or the number of localized virtual resource blocks is sent, user data can be transmitted at the calculated position.

The network equipment corresponding to the invention is shown in Figure 6, including:

The 601 radio frequency unit is used to convert the baseband signal of the 602 baseband processing unit into a high-frequency signal and send it out, and convert the received high-frequency signal into a baseband signal and send it to the 602 baseband processing unit;

602 baseband processing unit, used for baseband signal processing;

603 a resource control unit, configured to control 602 the physical resources used by the baseband processing unit when sending data.

Among them, the 603 resource control unit is the main part of the present invention, which is used to determine the position where the distributed virtual resource block and the localized virtual resource block are mapped to the physical resource block, and then controls the 602 baseband processing unit to map the distributed virtual resource block. The user data using distributed transmission is sent in the physical resource block to which the localized virtual resource block is mapped, and the user data using localized transmission is sent in the physical resource block to which the localized virtual resource block is mapped.

User terminal equipment and user terminal operations:

The flow of the user terminal operation is shown in Figure 5, including steps:

501 The user terminal sends a CQI (Channel Quality Indication) report;

502 The user terminal receives the number of distributed virtual resource blocks;

503 The user terminal judges the number of distributed virtual resource blocks and the ratio of the number of distributed virtual resource blocks to the number of physical resource blocks to determine the location where the distributed virtual resource blocks and localized virtual resource blocks are mapped to the physical resource blocks;

The proportional relationship between the number of distributed virtual resource blocks and the number of physical resource blocks can be divided into two types: one is that the number of distributed virtual resource blocks is less than or equal to half of the number of physical resource blocks; The number of resource blocks is greater than one-half of the number of physical resource blocks. According to these two situations, different methods are used to calculate the position where the distributed virtual resource block and the localized virtual resource block are mapped to the physical resource block.

504 The user terminal receives its own data on at least one subcarrier in the physical resource block where it is located.

The user terminal equipment corresponding to this invention is shown in Figure 7, including:

The 701 radio frequency unit is used to convert the baseband signal of the 702 baseband processing unit into a high frequency signal and send it out, and convert the received high frequency signal into a baseband signal and send it to the 702 baseband processing unit;

702 baseband processing unit, used for baseband signal processing, and control 706 display;

703 resource allocation subunit, used to control 704 data demodulation subunit;

704 data demodulation subunit, used for demodulation and decoding of baseband data;

705 keyboards for inputting user commands;

706 display;

The 707 processor is used to interpret the commands entered by the user and exchange information with the 702 baseband processing unit, mainly to complete the functions of L2 and L3.

Among them, the 703 resource allocation subunit is the main part of the present invention, which is mainly used to determine the position where the distributed virtual resource block and the localized virtual resource block are mapped to the physical resource block, and then control the 704 data demodulation subunit, in the physical resource block where it is located. At least one subcarrier in the resource block is used to demodulate its own data.

From the system composition, network and user terminal equipment composition and operation described above, we can see that a very important step is how to determine the distributed virtual resource block and local virtual resource block with the number of known virtual resource blocks Maps to the location of the physical resource block. The network side will use this method to determine the location where the distributed virtual resource block and the localized virtual resource block are mapped to the physical resource block, so as to send user data using distributed transmission and user data using localized transmission at the corresponding location. The user terminal will use this method to determine the location where the distributed virtual resource block and the localized virtual resource block are mapped to the physical resource block, so as to receive its own data on at least one subcarrier of the corresponding physical resource block.

In order to illustrate the method of mapping the distributed virtual resource block and the localized virtual resource block to the physical resource block, firstly, how to express the mapping from the virtual resource block to the physical resource block is described.

The positions where distributed virtual resource blocks and localized virtual resource blocks are mapped to physical resource blocks can be expressed in the following two ways.

Representation method 1: Represented by a set of serial numbers

The N _PRB physical resource blocks are numbered in sequence, and the sequence numbers are 0, 1, 2, ... N _PRB -1. Then the physical resource blocks to which the distributed virtual resource blocks are mapped can be represented by a set as a set of sequence numbers of physical resource blocks used for distributed transmission. The physical resource blocks to which the localized virtual resource blocks are mapped can be represented by a set as a set of sequence numbers of the physical resource blocks used for localized transmission.

In the present invention, the serial numbers of physical resource blocks, distributed virtual resource blocks, partial virtual resource blocks, and parts of distributed virtual resource blocks all start from 0.

For example: the number of physical resource blocks is 12, that is, N _PRB =12, and the numbers are 0, 1, 2, . . . N _PRB -1 in sequence. Among them, physical resource blocks with sequence numbers 0, 4, and 8 are used for the transmission of distributed virtual resource blocks, and physical resource blocks with sequence numbers 1, 2, 3, 5, 6, 7, 9, 10, and 11 are used for localized virtual resource blocks. Transmission of resource blocks. Then the physical resource blocks to which the distributed virtual resource blocks are mapped can be expressed as {0, 4, 8}, and the physical resource blocks to which the localized virtual resource blocks are mapped can be expressed as {1, 2, 3, 5, 6, 7, 9, 10, 11}.

Representation method 2: Represented by bitmap

There are N _PRB physical resource blocks, and a 0.1 sequence with a length of N _PRB represents the mapping from virtual resource blocks to physical resource blocks. The 0.1 sequence with a length of N _PRB is the 0th bit, the 1st bit, ..., the N _PRB -1 bit from left to right, and the i-th bit of the sequence represents the mapping situation of the i-th physical resource block (i= 0, 1, 2, ..., N _PRB -1). In the present invention, 1 indicates that the physical resource block is mapped by a distributed virtual resource block and is used for distributed transmission, and 0 indicates that the physical resource block is mapped by a localized virtual resource block and is used for localized transmission.

For example: the number of physical resource blocks is 12, that is, N _PRB =12, and the numbers are 0, 1, 2, . . . N _PRB -1 in sequence. Among them, physical resource blocks with sequence numbers 0, 4, and 8 are used for the transmission of distributed virtual resource blocks, and physical resource blocks with sequence numbers 1, 2, 3, 5, 6, 7, 9, 10, and 11 are used for localized virtual resource blocks. Transmission of resource blocks. Then, the bit mapping is used to represent the mapping from the virtual resource block to the physical resource block as: 100010001000.

The method of determining the location where the distributed virtual resource block and the localized virtual resource block are mapped to the physical resource block will be described in detail below. According to the above two representations of mapping from virtual resource blocks to physical resource blocks, two methods for realizing the mapping from virtual resource blocks to physical resource blocks are given.

First, two special cases are described, the cases of N _DVRB =0 and N _DVRB =N _PRB , which do not need to be calculated by formulas. One case is when N _DVRB =0, all physical resource blocks are used for localized transmission; the other case is when N _DVRB =N _PRB , all physical resource blocks are used for distributed transmission. Other situations where 0<N _DVRB <N _PRB can be calculated according to the following method.

Method 1: Complement Set Method

When the number of distributed virtual resource blocks is less than or equal to half of the number of physical resource blocks, calculate the mapping of distributed virtual resource blocks and localized virtual resource blocks to physical resource blocks according to the number of distributed virtual resource blocks The position can be calculated according to the following mapping formula.

Wherein N _PRB represents the number of physical resource blocks, N _DVRB represents the number of distributed virtual resource blocks, and Step is an intermediate variable. Then the physical resource block sequence number used for distributed transmission is given by the following formula:

$\mathrm{<span\; class="notranslate">\; distributed</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; position</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span><span\; class="notranslate">\; \{</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; \&Center\; Dot;</span>\mathrm{<span\; class="notranslate">\; step</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0,1,2</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \}</span><span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; if</span>}{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; \&le;</span>\frac{{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">N</figure-callout></span><figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}}$

The position where distributed virtual resource blocks are mapped to physical resource blocks is represented by distributed_position(), which is a function of the number of distributed virtual resource blocks, that is, given the number of distributed virtual resource blocks, the distributed virtual resource blocks can be calculated The resource block is mapped to the location of the physical resource block. Then the location where the distributed virtual resource block is mapped to the physical resource block is known, and the remaining physical resource blocks are physical resource blocks for localized transmission. It can be expressed as follows:

$\mathrm{<span\; class="notranslate">\; localized</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; position</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; )</span>$

$<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; complement</span>}<span\; class="notranslate">\; \{</span>\mathrm{<span\; class="notranslate">\; distributed</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; position</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \}</span>$

$<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; complement</span>}<span\; class="notranslate">\; \{</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; \&Center\; Dot;</span>\mathrm{<span\; class="notranslate">\; step</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0,1,2</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \}</span><span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; if</span>}{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; \&le;</span>\frac{{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">N</figure-callout></span><figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}}$

When the number of distributed virtual resource blocks is greater than half of the number of physical resource blocks, the position where the distributed virtual resource blocks are mapped to the physical resource blocks is based on the distributed virtual resource blocks complementary to the number of distributed virtual resource blocks. The location complement set of distributed virtual resource blocks mapped to physical resource blocks calculated by the number of resource blocks. Complementary numbers of two distributed virtual resource blocks means that their sum is the total number of physical resource blocks. Specifically include steps:

i) Complementing the number N _DVRB of distributed virtual resource blocks, that is, finding (N _PRB -N _DVRB );

j) Find the position where the distributed virtual resource block is mapped to the physical resource block when the number of distributed virtual resource blocks is (N _PRB -N _DVRB );

The specific formula is as follows:

The sequence numbers of physical resource blocks used for distributed transmission are:

distributed_position(N _PRB -N _DVRB )={i·Step, (i=0, 1, 2,...N _PRB -N _DVRB -1)}

k) Complementary set for the location where the distributed virtual resource block mapped to the physical resource block obtained in step j) is the position where the distributed virtual resource block is mapped to the physical resource block when the number of distributed virtual resource blocks is N _DVRB , the full set is {0, 1, 2, ..., N _PRB -1}.

The specific formula is as follows:

distributed_position(N _DVRB )

＝complement{distributed_position(N _PRB -N _DVRB )}

=complement{(i·Step), (i=0, 1, 2, . . . N _PRB -N _DVRB -1)}

Among them, the function complement{} is the operation of taking the complement set, and the full set is {0, 1, 2, ..., N _PRB -1}.

Then the location where the distributed virtual resource block is mapped to the physical resource block is known, and the remaining physical resource blocks are physical resource blocks for localized transmission. It can be expressed as follows:

localized_position(N _DVRB )

＝complement{distributed_position(N _DVRB )}

＝complement{complement{distributed_position(N _PRB -N _DVRB )}}

= {(i·Step), (i=0, 1, 2, . . . N _PRB -N _DVRB -1)}

Note that step i) and step j) can also be combined into one step.

For convenience, the $N_{\mathrm{DVRB}}\&le;\frac{{\mathrm{<figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">N</figure-callout>}}_{\mathrm{PRB}}}{2}$ and $N_{\mathrm{DVRB}}>\frac{{\mathrm{<figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">N</figure-callout>}}_{\mathrm{PRB}}}{2}$ Taiwan is represented by a formula,

Then the physical resource block sequence number used for distributed transmission is given by the following formula:

$\mathrm{<span\; class="notranslate">\; distributed</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; position</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\left\{\begin{array}{c}<span\; class="notranslate">\; \{</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; \&CenterDot;</span>\mathrm{<span\; class="notranslate">\; step</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0,1,2</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \}</span><span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; if</span>}{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; \&le;</span>\frac{{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">N</figure-callout></span><figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}}\\ \mathrm{<span\; class="notranslate">\; complement</span>}<span\; class="notranslate">\; \{</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; \&Center\; Dot;</span>\mathrm{<span\; class="notranslate">\; step</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ,</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0,1,2</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; ,</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; PRB</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \}</span><span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; if</span>}{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; ></span>\frac{{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">N</figure-callout></span><figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}}\end{array}\right.$

Then the physical resource block number for localized transmission is given by the following formula:

$\mathrm{<span\; class="notranslate">\; localized</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; position</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; )</span>$

$<span\; class="notranslate">\; =</span>\left\{\begin{array}{c}\mathrm{<span\; class="notranslate">\; complement</span>}<span\; class="notranslate">\; \{</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; \&CenterDot;</span>\mathrm{<span\; class="notranslate">\; step</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0,1,2</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \}</span><span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; if</span>}{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; \&le;</span>\frac{{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; PRB</span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}}\\ <span\; class="notranslate">\; \{</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; \&CenterDot;</span>\mathrm{<span\; class="notranslate">\; step</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ,</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0,1,2</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; ,</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; PRB</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \}</span><span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; if</span>}{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; ></span>\frac{{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">N</figure-callout></span><figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}}\end{array}\right.$

Method 2: Bitmap method

When the number of distributed virtual resource blocks is less than or equal to half of the number of physical resource blocks, calculate the mapping of distributed virtual resource blocks and localized virtual resource blocks to physical resource blocks according to the number of distributed virtual resource blocks The position can be calculated according to the following mapping formula.

Wherein N _PRB represents the number of physical resource blocks, N _DVRB represents the number of distributed virtual resource blocks, and Step is an intermediate variable. Then the physical resource block sequence number used for distributed transmission is given by the following formula:

$\mathrm{<span\; class="notranslate">\; distributed</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; position</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span><span\; class="notranslate">\; \{</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; \&CenterDot;</span>\mathrm{<span\; class="notranslate">\; step</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0,1,2</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \}</span><span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; if</span>}{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; \&le;</span>\frac{{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">N</figure-callout></span><figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}}$

The sequence S is used to indicate the position where the virtual resource block is mapped to the physical resource block: the length of the sequence S is N _PRB , and from left to right it represents the 0th, 1st, 2nd, ..., N _PRB -1 For the mapping of physical resource blocks, the i-th position of the sequence S is set to 1. If i is equal to the sequence number of the physical resource block used for distributed transmission calculated in this step, the remaining positions are 0. 1 means that the physical resource block is composed of The distributed virtual resource block is mapped for distributed transmission, and 0 indicates that the physical resource block is mapped by a localized virtual resource block for localized transmission.

When the number of distributed virtual resource blocks is greater than half of the number of physical resource blocks, the bit mapping sequence of distributed virtual resource blocks mapped to physical resource blocks is based on the distribution complementary to the number of distributed virtual resource blocks The bit-mapping sequence of the distributed virtual resource block mapped to the physical resource block calculated by the number of virtual resource blocks in the formula is reversed bit by bit by 0 and 1. Complementary numbers of two distributed virtual resource blocks means that their sum is the total number of physical resource blocks. Specifically include steps:

i) Complementing the number N _DVRB of distributed virtual resource blocks, that is, finding (N _PRB -N _DVRB );

j) Find the position where the distributed virtual resource block is mapped to the physical resource block when the number of distributed virtual resource blocks is (N _PRB -N _DVRB ), and express it by bit mapping;

The specific formula is as follows:

The sequence numbers of physical resource blocks used for distributed transmission are:

distributed_position(N _PRB -N _DVRB )={i·Step, (i=0, 1, 2,... N _PRB -N _DVRB -1)}

The sequence S is used to indicate the position where the virtual resource block is mapped to the physical resource block: the length of the sequence S is N _PRB , and from left to right it represents the 0th, 1st, 2nd, ..., N _PRB -1 For the mapping of physical resource blocks, the i-th position of the sequence S is set to 1, and if i is equal to the sequence number of the physical resource block used for distributed transmission calculated in this step, the remaining positions are set to 0. 1 indicates that the physical resource block is mapped by a distributed virtual resource block and is used for distributed transmission, and 0 indicates that the physical resource block is mapped by a localized virtual resource block and is used for localized transmission.

k) Perform 0 and 1 inversion bit by bit for the bit mapping sequence obtained in step j), that is, 0 becomes 1, and 1 becomes 0. The sequence S is reversed to obtain the sequence S, and the sequence S is a bit mapping representation from virtual resource blocks to physical resource blocks when the number of virtual resource blocks is N _DVRB .

Note that step i) and step j) can also be combined into one step.

Table 2 shows the mapping results of distributed virtual resource blocks and localized virtual resource blocks to physical resource blocks under different N _DVRB situations when N _PRB = 12, expressed by bit mapping method, 1 indicates that it is used for distributed transmission Physical resource block, 0 represents a physical resource block used for localized transmission, and represents the 0th, 1st, 2nd, ..., 11th physical resource block in sequence from left to right.

Table 2 Mapping results of distributed virtual resource blocks and localized virtual resource blocks to physical resource blocks under different N _DVRB situations when N _PRB = 12 _DVRB step Bitmap 0 - 000000000000 1 12 100000000000 2 6 100000100000 3 4 100010001000 4 3 100100100100 5 2 101010101000 6 2 101010101010 7 2 010101010111 8 3 011011011011 9 4 011101110111 10 6 011111011111 11 12 011111111111 12 - 111111111111

Another aspect of the invention is to consider inter-subframe frequency hopping, so as to avoid a physical resource block being occupied by distributed resources for a long time, which affects localized resource allocation. On the basis of the above-described mapping method of virtual resource blocks to physical resource blocks, the subframe sequence number can be used as a frequency hopping parameter, that is to say, the position where the distributed virtual resource block is mapped to the physical resource block can be related to the current subframe number . The method for mapping virtual resource blocks to physical resource blocks based on inter-subframe frequency hopping will be described in detail below. Two implementation methods are also given according to the two ways of expressing the mapping from virtual resource blocks to physical resource blocks.

Method 1: Complement Set Method

When the number of distributed virtual resource blocks is less than or equal to half of the number of physical resource blocks, the position where the distributed virtual resource blocks are mapped to the physical resource blocks can be calculated according to the following mapping formula.

Wherein N _PRB represents the number of physical resource blocks, N _DVRB represents the number of distributed virtual resource blocks, and Step is an intermediate variable. Then the physical resource block sequence number used for distributed transmission is given by the following formula:

$\mathrm{<span\; class="notranslate">\; distributed</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; position</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; )</span>$

$=\{(i\&Center\; Dot;\mathrm{step}+\mathrm{sub}\_\mathrm{frame}\_\mathrm{number})\mathrm{mod}{N}_{\mathrm{PRB}},(i=\mathrm{0,1,2},...N_{\mathrm{DVRB}}-1)\},\mathrm{if}{N}_{\mathrm{DVRB}}\&le;\frac{{\mathrm{<figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">N</figure-callout>}}_{\mathrm{PRB}}}{2}$ Wherein, sub_frame_number represents a subframe number, which can be 0, 1, 2, ... N _{sub_frames} -1, where N _{sub_frames} is the number of subframes in one frame.

If the location where the distributed virtual resource block is mapped to the physical resource block is known, then the remaining physical resource block is the physical resource block used for localized transmission. It can be expressed as follows:

$\mathrm{<span\; class="notranslate">\; localized</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; position</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; )</span>$

$<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; complement</span>}<span\; class="notranslate">\; \{</span>\mathrm{<span\; class="notranslate">\; distributed</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; position</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \}</span>$

$<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; complement</span>}<span\; class="notranslate">\; \{</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; \&Center\; Dot;</span>\mathrm{<span\; class="notranslate">\; step</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; sub</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; frame</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; number</span>}<span\; class="notranslate">\; )</span>\mathrm{<span\; class="notranslate">\; mod</span>}{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; PRB</span>}}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0,1,2</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \}</span><span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; if</span>}{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; \&le;</span>\frac{{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">N</figure-callout></span><figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}}$

When the number of distributed virtual resource blocks is greater than half of the number of physical resource blocks, the position where the distributed virtual resource blocks are mapped to the physical resource blocks is based on the distributed virtual resource blocks complementary to the number of distributed virtual resource blocks. The location complement set of distributed virtual resource blocks mapped to physical resource blocks calculated by the number of resource blocks. Complementary numbers of two distributed virtual resource blocks means that their sum is the total number of physical resource blocks. Specifically, you can follow the steps below:

i) Complementing the number N _DVRB of distributed virtual resource blocks, that is, finding (N _PRB -N _DVRB );

j) Find the position where the distributed virtual resource block is mapped to the physical resource block when the number of distributed virtual resource blocks is (N _PRB -N _DVRB );

The specific formula is as follows:

distributed_position(N _PRB -N _DVRB )

={(i·Step+sub_frame_number) mod N _PRB , (i=0, 1, 2, . . . N _PRB -N _DVRB -1)}

k) Complementary set for the location where the distributed virtual resource block mapped to the physical resource block obtained in step j) is the position where the distributed virtual resource block is mapped to the physical resource block when the number of distributed virtual resource blocks is N _DVRB , the full set is {0, 1, 2, ..., N _PRB -1}.

distributed_position(N _DVRB )

＝complement{distributed_position(N _PRB -N _DVRB )}

=complement{(i·Step+sub_frame_number) mod N _PRB , (i=0, 1, 2, . . . N _PRB -N _DVRB -1)}

Among them, the function complement{} is the operation of taking the complement set, and the full set is {0, 1, 2, ..., N _PRB -1}.

If the location where the distributed virtual resource block is mapped to the physical resource block is known, then the remaining physical resource block is the physical resource block used for localized transmission. It can be expressed as follows:

localized_position(N _DVRB )

＝complement{distributed_position(N _DVRB )}

＝complement{complement{distributed_position(N _PRB -N _DVRB )}}

={(i·Step+sub_frame_number) mod N _PRB , (i=0, 1, 2, . . . N _PRB -N _DVRB -1)}

Note that step i) and step j) can also be combined into one step.

For convenience, the $N_{\mathrm{DVRB}}\&le;\frac{{\mathrm{<figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">N</figure-callout>}}_{\mathrm{PRB}}}{2}$ and $N_{\mathrm{DVRB}}>\frac{{\mathrm{<figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">N</figure-callout>}}_{\mathrm{PRB}}}{2}$ combined into one formula,

Then the physical resource block sequence number used for distributed transmission is given by the following formula:

$\mathrm{<span\; class="notranslate">\; distributed</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; position</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; )</span>$

$<span\; class="notranslate">\; =</span>\left\{\begin{array}{c}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; \&Center\; Dot;</span>\mathrm{<span\; class="notranslate">\; step</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; sub</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; frame</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; number</span>}<span\; class="notranslate">\; )</span>\mathrm{<span\; class="notranslate">\; mod</span>}{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; PRB</span>}}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0,1,2</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; if</span>}{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; \&le;</span>\frac{{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">N</figure-callout></span><figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}}\\ \mathrm{<span\; class="notranslate">\; complement</span>}<span\; class="notranslate">\; \{</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; \&Center\; Dot;</span>\mathrm{<span\; class="notranslate">\; step</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; sub</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; frame</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; number</span>}<span\; class="notranslate">\; )</span>\mathrm{<span\; class="notranslate">\; mod</span>}{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; PRB</span>}}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0,1,2</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; ,</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; PRB</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \}</span><span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; if</span>}{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; ></span>\frac{{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">N</figure-callout></span><figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}}\end{array}\right.$

Then the physical resource block number for localized transmission is given by the following formula:

$\mathrm{<span\; class="notranslate">\; localized</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; position</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; )</span>$

$<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; complete</span>}<span\; class="notranslate">\; \{</span>\mathrm{<span\; class="notranslate">\; distributed</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; position</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \}</span>$

$<span\; class="notranslate">\; =</span>\left\{\begin{array}{c}\mathrm{<span\; class="notranslate">\; complement</span>}<span\; class="notranslate">\; \{</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; \&Center\; Dot;</span>\mathrm{<span\; class="notranslate">\; step</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; sub</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; frame</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; number</span>}<span\; class="notranslate">\; )</span>\mathrm{<span\; class="notranslate">\; mod</span>}{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; PRB</span>}}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0,1,2</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \}</span><span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; if</span>}{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; \&le;</span>\frac{{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; PRB</span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}}\\ <span\; class="notranslate">\; \{</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; \&CenterDot;</span>\mathrm{<span\; class="notranslate">\; step</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; sub</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; frame</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; number</span>}<span\; class="notranslate">\; )</span>\mathrm{<span\; class="notranslate">\; mod</span>}{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; PRB</span>}}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0,1,2</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; ,</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; PRB</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \}</span><span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; if</span>}{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; ></span>\frac{{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">N</figure-callout></span><figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}}\end{array}\right.$

Method 2: Bitmap method

When the number of distributed virtual resource blocks is less than or equal to half of the number of physical resource blocks, calculate the mapping of distributed virtual resource blocks and localized virtual resource blocks to physical resource blocks according to the number of distributed virtual resource blocks The position can be calculated according to the following mapping formula.

Wherein N _PRB represents the number of physical resource blocks, N _DVRB represents the number of distributed virtual resource blocks, and Step is an intermediate variable. Then the physical resource block sequence number used for distributed transmission is given by the following formula:

$\mathrm{<span\; class="notranslate">\; distributed</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; position</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; )</span>$

$<span\; class="notranslate">\; =</span><span\; class="notranslate">\; \{</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; \&CenterDot;</span>\mathrm{<span\; class="notranslate">\; step</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; sub</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; frame</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; number</span>}<span\; class="notranslate">\; )</span>\mathrm{<span\; class="notranslate">\; mod</span>}{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; PRB</span>}}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0,1,2</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \}</span><span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; if</span>}{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; \&le;</span>\frac{{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">N</figure-callout></span><figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}}$

Wherein, sub_frame_number represents a subframe number, which can be 0, 1, 2, ... N _{sub_frames} -1, where N _{sub_frames} is the number of subframes in one frame.

The sequence S is used to indicate the position where the virtual resource block is mapped to the physical resource block: the length of the sequence S is N _PRB , and from left to right it represents the 0th, 1st, 2nd, ..., N _PRB -1 For the mapping of physical resource blocks, the i-th position of the sequence S is set to 1, and if i is equal to the sequence number of the physical resource block used for distributed transmission calculated in this step, the remaining positions are set to 0. 1 indicates that the physical resource block is mapped by a distributed virtual resource block and is used for distributed transmission, and 0 indicates that the physical resource block is mapped by a localized virtual resource block and is used for localized transmission.

When the number of distributed virtual resource blocks is greater than half of the number of physical resource blocks, the bit mapping sequence of distributed virtual resource blocks mapped to physical resource blocks is based on the distribution complementary to the number of distributed virtual resource blocks The bit-mapping sequence of the distributed virtual resource block mapped to the physical resource block calculated by the number of virtual resource blocks in the formula is reversed bit by bit by 0 and 1. Complementary numbers of two distributed virtual resource blocks means that their sum is the total number of physical resource blocks. Specifically include steps:

i) Complementing the number N _DVRB of distributed virtual resource blocks, that is, finding (N _PRB -N _DVRB );

j) Find the position where the distributed virtual resource block is mapped to the physical resource block when the number of distributed virtual resource blocks is (N _PRB -N _DVRB ), and express it by bit mapping;

The specific formula is as follows:

The sequence numbers of physical resource blocks used for distributed transmission are:

distributed_position(N _PRB -N _DVRB )

={(i·Step+sub_frame_number) mod N _PRB , (i=0, 1, 2, . . . N _PRB -N _DVRB -1)}

The sequence S is used to indicate the position where the virtual resource block is mapped to the physical resource block: the length of the sequence S is N _PRB , and from left to right it represents the 0th, 1st, 2nd, ..., N _PRB -1 For the mapping of physical resource blocks, the i-th position of the sequence S is set to 1, and if i is equal to the sequence number of the physical resource block used for distributed transmission calculated in this step, the remaining positions are set to 0. 1 indicates that the physical resource block is mapped by a distributed virtual resource block and is used for distributed transmission, and 0 indicates that the physical resource block is mapped by a localized virtual resource block and is used for localized transmission.

k) Perform 0 and 1 inversion bit by bit for the bit mapping sequence obtained in step j), that is, 0 becomes 1, and 1 becomes 0. The sequence S is reversed to obtain the sequence S, and the sequence S is a bit mapping representation from virtual resource blocks to physical resource blocks when the number of virtual resource blocks is N _DVRB .

Note that step i) and step j) can also be combined into one step.

Table 3 shows the mapping results of distributed virtual resource blocks and localized virtual resource blocks to physical resource blocks when N _PRB = 12 and N _DVRB = 2 in different subframes. For distributed transmission physical resource blocks, 0 represents a physical resource block for localized transmission, and from left to right represents the 0th, 1st, 2nd, ..., 11th physical resource blocks.

Table 3 When N _PRB = 12, N _DVRB = 2, the mapping results of distributed virtual resource blocks and localized virtual resource blocks to physical resource blocks in different subframes Sub-frame index Bitmap 0 100000100000 1 010000010000 2 001000001000 3 000100000100 4 000010000010

5 000001000001 6 100000100000 7 010000010000 8 001000001000 9 000100000100 10 000010000010 11 000001000001 12 100000100000

The method for calculating the mapping from the virtual resource block to the physical resource block is given above. In the implementation, the calculation can be performed in real time according to the formula, or the look-up table method can be used. In the look-up table method, the mapping position can be calculated according to the formula first, and then the table can be stored, which can be stored in the ROM, or calculated once every time it is turned on, and then stored as a table, or calculated once every time a link is established , and then store the table. In the table, the number of distributed virtual resource blocks may be used as an index. Then, when looking up the table, if the number of distributed virtual resource blocks is known, the mapping position of the virtual resource blocks to the physical resource blocks can be found out. If inter-subframe frequency hopping is adopted, the subframe sequence number may be used as the second index.

It is worth mentioning that in the present invention, when the number of distributed virtual resource blocks is less than or equal to 1/2 of the number of physical resource blocks, Ericsson's method in 3GPP R1-060095 can be used to calculate the virtual resource block to physical A map of resource blocks.

Wherein N _PRB represents the number of physical resource blocks, N _DVRB represents the number of distributed virtual resource blocks, and Step is an intermediate variable. Then the physical resource block sequence number used for distributed transmission is given by the following formula:

$\mathrm{<span\; class="notranslate">\; distributed</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; position</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span><span\; class="notranslate">\; \{</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; \&CenterDot;</span>\mathrm{<span\; class="notranslate">\; step</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0,1,2</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \}</span><span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; if</span>}{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; \&le;</span>\frac{{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">N</figure-callout></span><figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}}$

The situation when the number of distributed virtual resource blocks is greater than one-half of the number of physical resource blocks will be converted to the situation when the number of distributed virtual resource blocks is less than or equal to one-half of the number of physical resource blocks for calculation. Here When the number of distributed virtual resource blocks is less than or equal to half of the number of physical resource blocks, the Ericsson method described above in 3GPP R1-060095 can be used to calculate the mapping from virtual resource blocks to physical resource blocks. That is, when the number of distributed virtual resource blocks is (N _PRB -N _DVRB ) in step j), the Ericsson formula is used when the distributed virtual resource blocks are mapped to the positions of the physical resource blocks:

The sequence numbers of physical resource blocks used for distributed transmission are:

$\mathrm{<span\; class="notranslate">\; distributed</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; position</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span><span\; class="notranslate">\; \{</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; \&CenterDot;</span>\mathrm{<span\; class="notranslate">\; step</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0,1,2</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \}</span><span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; if</span>}{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; \&le;</span>\frac{{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">N</figure-callout></span><figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">\; </figure-callout>}}_{\mathrm{<span\; class="notranslate">\; </span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}}$

The other steps are the same as described above in the complement set and bitmap method.

Three embodiments are given below to illustrate how to use a mapping formula to determine the location where a distributed virtual resource block is mapped to a physical resource block. In these three embodiments, frequency hopping between subframes is not used. When the number of distributed virtual resource blocks is less than or equal to 1/2 of the number of physical resource blocks, the method in the present invention is used to calculate the number of virtual resource blocks to physical resource blocks. A map of resource blocks.

Embodiment 1: Taking N _PRB =12, N _DVRB =5 as an example, the method of finding the complement set is used for calculation, and the user terminal is in distributed transmission.

First, the user terminal sends a CQI (Channel Quality Indication) report;

Then, the network determines the number of distributed virtual resource blocks or the number of localized virtual resource blocks, and sends them to the user terminal. For 5MHz bandwidth, because N _PRB = 12, so N _DVRB ≤ 12, 4-bit information can be used to send the number of distributed virtual resource blocks to the user terminal, N _DVRB = 5, can be directly encoded as 0101 in binary, then The information sent by the network to the user terminal is 0101;

Then, the network sends the user data, and the physical resource position occupied by the sent user data can be calculated according to the method described in the present invention;

because $N_{\mathrm{DVRB}}<\frac{{\mathrm{<figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">N</figure-callout>}}_{\mathrm{PRB}}}{2},$ so,

distributed_position(N _DVRB = 5) = {i·Step, (i = 0, 1, 2, ... N _DVRB -1)} = {0, 2, 4, 6, 8},

That is, the physical resource block numbers for distributed transmission are {0, 2, 4, 6, 8}, and the physical resource block numbers for localized transmission are {1, 3, 5, 7, 9, 10, 11} .

Assuming that there are 5 user terminals in distributed transmission, the number of virtual resource blocks of these 5 user terminals is 1, and the size is equal. Then these 5 virtual resource blocks will be further multiplexed on the physical resource blocks {0, 2, 4, 6, 8}. Specifically, the following multiplexing methods can be adopted.

如果一个物理资源块包含的子载波数不能被N_DVRB除尽，则让除第0部分外的其他部分包含的子载波数为 其中，N_{sub-carriers_per_PRB}为一个物理资源块包含的子载波数，那么第0部分包含的子载波数为

用P_i，j表示第i个分布式虚拟资源块的第j个部分。那么一个分布式虚拟资源块的N_DVRB个部分分别映射到N_DVRB个用于分布式传输的物理资源块上。将用于分布式传输的物理资源块按照从小到大的序号重新排序为0，1，2，...，N_DVRB-1，则分布式虚拟资源块的P_i，j部分映射到用于分布式传输的第j个物理资源块的第(i+j)modN_DVRB个部分。Each distributed virtual resource block is divided into approximately equal N _DVRB parts, and each physical resource block is also divided into approximately equal N _DVRB parts by the same method. If the number of subcarriers contained in a physical resource block can be divided by N _DVRB , then let the number of subcarriers contained in each part be

If the number of subcarriers contained in a physical resource block cannot be divided by N _DVRB , let the number of subcarriers contained in other parts except the 0th part be Among them, N _{sub-carriers_per_PRB} is the number of subcarriers contained in a physical resource block, then the number of subcarriers contained in part 0 is

Let P _i,j denote the jth part of the ith distributed virtual resource block. Then N _DVRB parts of a distributed virtual resource block are respectively mapped to N _DVRB physical resource blocks for distributed transmission. Reorder the physical resource blocks used for distributed transmission to 0, 1, 2, ..., N _DVRB -1 according to the sequence numbers from small to large, then the P _{i, j} part of the distributed virtual resource block is mapped to the The (i+j)modN _DVRB -th part of the j-th physical resource block of the distributed transmission.

In this embodiment, N _DVRB =5, each distributed virtual resource block is divided into 5 parts, and each part includes 5 subcarriers. The 0th distributed virtual resource block is divided into 5 parts-P ₀₀ , P ₀₁ , P ₀₂ , P ₀₃ , P ₀₄ ; the 1st distributed virtual resource block is divided into 5 parts-P ₁₀ , P ₁₁ , P ₁₂ , P ₁₃ , P ₁₄ ; the second distributed virtual resource block is divided into 5 parts- _{P 20} , P ₂₁ , P ₂₂ , P ₂₃ , P ₂₄ ; the third distributed virtual resource block is divided into 5 parts-P ₃₀ , P ₃₁ , P ₃₂ , P ₃₃ , P ₃₄ ; the fourth distributed virtual resource block is divided into 5 parts- _{P 40} , P ₄₁ , P ₄₂ , P ₄₃ , P ₄₄ . The physical resource blocks {0, 2, 4, 6, 8} used for distributed transmission are also divided into 5 parts respectively. As shown in Figure 8. Then part 0 of the 0th distributed virtual resource block is mapped to part 0 of the 0th physical resource block, and part 1 of the 0th distributed virtual resource block is mapped to part 1 of the second physical resource block , Part 2 of the 0th distributed virtual resource block is mapped to part 2 of the 4th physical resource block, and part 3 of the 0th distributed virtual resource block is mapped to part 3 of the 6th physical resource block , the 4th part of the 0th distributed virtual resource block is mapped to the 4th part of the 8th physical resource block; similarly, the 1st part of the 1st distributed virtual resource block is mapped to the 2nd physical resource block Part 2; Part 4 of the 4th distributed virtual resource block is mapped to part 3 of the 8th physical resource block.

If the 0th user is assigned the 0th distributed virtual resource block (which can be implicitly indicated by the order of UE_ID), then the data of the 0th user will be in the 0th part of the 0th physical resource block, and the 2nd The first part of the physical resource block, the second part of the fourth physical resource block, the third part of the sixth physical resource block, and the fourth part of the eighth physical resource block are transmitted. Next, the user terminal receives N _DVRB as 0101, and obtains N _DVRB = 5, and judges that the number of distributed virtual resource blocks is less than half of the number of physical resource blocks, namely $N_{\mathrm{DVRB}}<\frac{{\mathrm{<figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">N</figure-callout>}}_{\mathrm{PRB}}}{2},$ Then the user terminal calculates the position where the distributed virtual resource block and the localized virtual resource block are mapped to the physical resource block according to the same algorithm as that of the network side.

distributed_position(N _DVRB = 5) = {i·Step, (i = 0, 1, 2, ... N _DVRB -1)} = {0, 2, 4, 6, 8}, which is used for distributed transmission The sequence numbers of the physical resource blocks used for localized transmission are {0, 2, 4, 6, 8}, and the sequence numbers of the physical resource blocks used for localized transmission are {1, 3, 5, 7, 9, 10, 11}.

Then, the user terminal will continue to judge its specific position in the physical resource block {0, 2, 4, 6, 8} of distributed transmission, which is also calculated through N _DVRB , and the calculation method is the same as that on the network side, so it will not be repeated here. For the 0th user, it knows that it has been allocated the 0th distributed virtual resource block, then the 0th user will be in the 0th part of the 0th physical resource block, and the 1st part of the 2nd physical resource block , the second part of the fourth physical resource block, the third part of the sixth physical resource block, and the fourth part of the eighth physical resource block receive data on subcarriers, and demodulate and decode them.

Embodiment 2: Taking N _PRB =12 and N _DVRB =7 as an example, the method of finding the complement set is used for calculation, and the user terminal is in distributed transmission.

First, the user terminal sends a CQI (Channel Quality Indication) report;

Then, the network determines the number of distributed virtual resource blocks or the number of localized virtual resource blocks, and sends them to the user terminal. For 5MHz bandwidth, because N _PRB = 12, so N _DVRB ≤ 12, 4-bit information can be used to send the number of distributed virtual resource blocks to the user terminal, N _DVRB = 7, can be directly encoded as 0111 in binary, then The information sent by the network to the user terminal is 0111;

Then, the network sends the user data, and the physical resources occupied by the sent user data can be calculated according to the method described in the present invention;

because $N_{\mathrm{DVRB}}>\frac{{\mathrm{<figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">N</figure-callout>}}_{\mathrm{PRB}}}{2},$

Therefore, firstly, the complement of N _DVRB is (N _PRB -N _DVRB )=12-7=5, and then, the number of distributed virtual resource blocks is calculated as (N _PRB -N _DVRB )=12-7=5 The location where the virtual resource block is mapped to the physical resource block;

distributed_position(N _PRB -N _DVRB )={i·Step, (i=0, 1, 2,... N _PRB -N _DVRB -1)}={0, 2, 4, 6, 8}

distributed_position(N _DVRB )

＝complement{distributed_position(N _PRB -N _DVRB )}

= complement {0, 2, 4, 6, 8} = {1, 3, 5, 7, 9, 10, 11}. That is, the physical resource block numbers for distributed transmission are {1, 3, 5, 7, 9, 10, 11}, and the physical resource block numbers for localized transmission are {0, 2, 4, 6, 8} .

Assuming that there are 7 user terminals in distributed transmission, the number of virtual resource blocks of these 7 user terminals is 1, and the size is equal. Then these 7 virtual resource blocks will be further multiplexed on the physical resource blocks {1, 3, 5, 7, 9, 10, 11}. The specific method is the same as that described in Example 1.

其中，N_{sub-carriers_per_PRB}为一个物理资源块包含的子载波数，那么第0部分包含的子载波数为

用P_i，j表示第i个分布式虚拟资源块的第j个部分。一个分布式虚拟资源块的N_DVRB个部分分别映射到N_DVRB个用于分布式传输的物理资源块上。将用于分布式传输的物理资源块按照从小到大的序号重新排序为0，1，2，...，N_DVRB-1，则分布式虚拟资源块的P_i，j部分映射到用于分布式传输的第j个物理资源块的第(i+j)modN_DVRB个部分。Each distributed virtual resource block is divided into approximately equal N _DVRB =7 parts, and each physical resource block is also divided into approximately equal N _DVRB =7 parts by the same method. Because the number of subcarriers contained in a physical resource block cannot be divided by N _DVRB = 7, then let the number of subcarriers contained in other parts except the 0th part be

Among them, N _{sub-carriers_per_PRB} is the number of subcarriers contained in a physical resource block, then the number of subcarriers contained in part 0 is

Let P _i,j denote the jth part of the ith distributed virtual resource block. N _DVRB parts of a distributed virtual resource block are respectively mapped to N _DVRB physical resource blocks for distributed transmission. Reorder the physical resource blocks used for distributed transmission to 0, 1, 2, ..., N _DVRB -1 according to the sequence numbers from small to large, then the P _{i, j} part of the distributed virtual resource block is mapped to the The (i+j)modN _DVRB -th part of the j-th physical resource block of the distributed transmission.

The 0th distributed virtual resource block is divided into 7 parts - _{P 00} , P ₀₁ , P ₀₂ , P ₀₃ , P ₀₄ , P ₀₅ , P ₀₆ ; the first distributed virtual resource block is divided into 7 parts - P ₁₀ , P ₁₁ , P ₁₂ , P ₁₃ , P ₁₄ , P ₁₅ , P ₁₆ ; the second distributed virtual resource block is divided into 7 parts-P ₂₀ , P 21 , P ₂₂ , P ₂₃ , _{P 24 ,} P ₂₅ , P ₂₆ ; the third distributed virtual resource block is divided into 7 parts- _{P 30} , P ₃₁ , P ₃₂ , P ₃₃ , P ₃₄ , P ₃₅ , P ₃₆ ; the fourth distributed virtual resource block is divided into 7 parts-P ₄₀ , P ₄₁ , P ₄₂ , P ₄₃ , P ₄₄ , P ₄₅ , P ₄₆ ; the fifth distributed virtual resource block is divided into 7 parts-P ₅₀ , P ₅₁ , P ₅₂ , P ₅₃ , P ₅₄ , P ₅₅ , P ₅₆ ; the sixth distributed virtual resource block is divided into seven parts- _{P 60} , P ₆₁ , P ₆₂ , P ₆₃ , P ₆₄ , P ₆₅ , P ₆₆ . The physical resource blocks {1, 3, 5, 7, 9, 10, 11} used for distributed transmission are also divided into 7 parts respectively. Then part 0 of the 0th distributed virtual resource block is mapped to part 0 of the first physical resource block, and part 1 of the 0th distributed virtual resource block is mapped to part 1 of the third physical resource block , Part 2 of the 0th distributed virtual resource block is mapped to part 2 of the 5th physical resource block, and part 3 of the 0th distributed virtual resource block is mapped to part 3 of the 7th physical resource block , the 4th part of the 0th distributed virtual resource block is mapped to the 4th part of the 9th physical resource block; the 5th part of the 0th distributed virtual resource block is mapped to the 5th part of the 10th physical resource block ; Part 6 of the 0th distributed virtual resource block is mapped to part 6 of the 11th physical resource block; similarly, part 1 of the 1st distributed virtual resource block is mapped to the 3rd physical resource block Part 2; Part 6 of the 6th distributed virtual resource block is mapped to part 5 of the 11th physical resource block.

If the 0th user is assigned the 0th distributed virtual resource block (which can be implicitly indicated by the order of UE_ID), then the data of the 0th user will be in the 0th part of the 1st physical resource block, and the 3rd Part 1 of PRB, Part 2 of 5th PRB, Part 3 of 7th PRB, Part 4 of 9th PRB, Part 5 of 10th PRB part; the sixth part of the 11th physical resource block is transmitted.

Next, the user terminal receives N _DVRB as 0111, and obtains N _DVRB = 7, and judges that the number of distributed virtual resource blocks is greater than half of the number of physical resource blocks, namely $N_{\mathrm{DVRB}}>\frac{{\mathrm{<figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">N</figure-callout>}}_{\mathrm{PRB}}}{2},$ Then the user terminal calculates the position where the distributed virtual resource block and the localized virtual resource block are mapped to the physical resource block according to the same algorithm as that of the network side.

First, the complement of N _DVRB is (N _PRB -N _DVRB )=12-7=5, and then, the number of distributed virtual resource blocks is calculated as (N _PRB -N _DVRB )=12-7=5 time-division virtual resources where the block is mapped to the physical resource block;

distributed_position(N _PRB -N _DVRB )={i·Step, (i=0, 1, 2,... N _PRB -N _DVRB -1)}={0, 2, 4, 6, 8}

distributed_position(N _DVRB )

＝complement{distributed_position(N _PRB -N _DVRB )}

= complement {0, 2, 4, 6, 8} = {1, 3, 5, 7, 9, 10, 11}. That is, the physical resource block numbers for distributed transmission are {1, 3, 5, 7, 9, 10, 11}, and the physical resource block numbers for localized transmission are {0, 2, 4, 6, 8} .

Then, the user terminal will continue to judge its specific position in the physical resource block {1, 3, 5, 7, 9, 10, 11} of the distributed transmission, which is also calculated by N _DVRB , and the calculation method is the same as that of the network side, here No longer. For the 0th user, it knows that it has been assigned the 0th distributed virtual resource block, then the data of the 0th user will be in the 0th part of the 1st physical resource block, and the 0th part of the 3rd physical resource block Part 1, part 2 of the 5th physical resource block, part 3 of the 7th physical resource block, part 4 of the 9th physical resource block, part 5 of the 10th physical resource block; the 11th Data is received, demodulated and decoded on the subcarriers of the sixth part of the physical resource block.

Embodiment 3: Taking N _PRB =12 and N _DVRB =7 as an example, bit mapping is used for calculation, and user terminals are in distributed transmission.

First, the user terminal sends a CQI (Channel Quality Indication) report;

Then, the network determines the number of distributed virtual resource blocks or the number of localized virtual resource blocks, and sends them to the user terminal. For 5MHz bandwidth, because N _PRB = 12, so N _DVRB ≤ 12, 4-bit information can be used to send the number of distributed virtual resource blocks to the user terminal, N _DVRB = 7, can be directly encoded as 0111 in binary, then The information sent by the network to the user terminal is 0111;

Then, the network sends the user data, and the physical resources occupied by the sent user data can be calculated according to the method described in the present invention;

because $N_{\mathrm{DVRB}}>\frac{{\mathrm{<figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">N</figure-callout>}}_{\mathrm{PRB}}}{2},$

Therefore, the number of distributed virtual resource blocks is complemented, that is, (N _PRB -N _DVRB )=12-7=5; when the number of distributed virtual resource blocks is 5, the distributed virtual resource blocks are mapped to physical The position of the resource block is represented by a bitmap method;

The physical resource block sequence number used for distributed transmission is given by the following formula:

distributed_position(N _PRB -N _DVRB )={i·Step, (i=0, 1, 2,... N _PRB -N _DVRB -1)}={0, 2, 4, 6, 8}

The sequence S is used to represent the position where the virtual resource block is mapped to the physical resource block: the length of the sequence S is 12, and it represents the 0th, the 1st, the 2nd, ..., the Nth _PRB -1 physical resource block in sequence from left to right For the mapping of resource blocks, set the i-th bit (i=0, 1, 2, ... N _PRB -1) of the sequence S to 1, if i is equal to the physical The sequence number of the resource block, and the rest of the positions are 0. Here, S=101010101000. 1 indicates that the physical resource block is mapped by a distributed virtual resource block and is used for distributed transmission, and 0 indicates that the physical resource block is mapped by a localized virtual resource block and is used for localized transmission.

Finally, perform 0 and 1 inversion on the sequence S bit by bit, that is, 0 becomes 1, 1 becomes 0, and the sequence S=010101010111 is obtained, and the sequence S is the virtual resource block to the physical resource block when the number of virtual resource blocks is N _DVRB bitmap representation of .

Assuming that there are 7 user terminals in distributed transmission, the number of virtual resource blocks of these 7 user terminals is 1, and the size is equal. Then these 7 virtual resource blocks will be further multiplexed on the physical resource blocks {1, 3, 5, 7, 9, 10, 11}. The specific method is the same as that described in Example 2.

其中，N_{sub-carriers_per_PRB}为一个物理资源块包含的子载波数，那么第0部分包含的子载波数为

用P_i，j表示第i个分布式虚拟资源块的第j个部分。一个分布式虚拟资源块的N_DVRB个部分分别映射到N_DVRB个用于分布式传输的物理资源块上。将用于分布式传输的物理资源块按照从小到大的序号重新排序为0，1，2，...，N_DVRB-1，则分布式虚拟资源块的P_i，j部分映射到用于分布式传输的第j个物理资源块的第(i+j)modN_DVRB个部分。Each distributed virtual resource block is divided into approximately equal N _DVRB =7 parts, and each physical resource block is also divided into approximately equal N _DVRB =7 parts by the same method. Because the number of subcarriers contained in a physical resource block cannot be divided by N _DVRB = 7, then let the number of subcarriers contained in other parts except the 0th part be

Among them, N _{sub-carriers_per_PRB} is the number of subcarriers contained in a physical resource block, then the number of subcarriers contained in part 0 is

Let P _i,j denote the jth part of the ith distributed virtual resource block. N _DVRB parts of a distributed virtual resource block are respectively mapped to N _DVRB physical resource blocks for distributed transmission. Reorder the physical resource blocks used for distributed transmission to 0, 1, 2, ..., N _DVRB -1 according to the sequence numbers from small to large, then the P _{i, j} part of the distributed virtual resource block is mapped to the The (i+j)modN _DVRB -th part of the j-th physical resource block of the distributed transmission.

The 0th distributed virtual resource block is divided into 7 parts - _{P 00} , P ₀₁ , P ₀₂ , P ₀₃ , P ₀₄ , P ₀₅ , P ₀₆ ; the first distributed virtual resource block is divided into 7 parts - P ₁₀ , P ₁₁ , P ₁₂ , P ₁₃ , P ₁₄ , P ₁₅ , P ₁₆ ; the second distributed virtual resource block is divided into 7 parts-P ₂₀ , P 21 , P ₂₂ , P ₂₃ , _{P 24 ,} P ₂₅ , P ₂₆ ; the third distributed virtual resource block is divided into 7 parts- _{P 30} , P ₃₁ , P ₃₂ , P ₃₃ , P ₃₄ , P ₃₅ , P ₃₆ ; the fourth distributed virtual resource block is divided into 7 parts-P ₄₀ , P ₄₁ , P ₄₂ , P ₄₃ , P ₄₄ , P ₄₅ , P ₄₆ ; the fifth distributed virtual resource block is divided into 7 parts-P ₅₀ , P ₅₁ , P ₅₂ , P ₅₃ , P ₅₄ , P ₅₅ , P ₅₆ ; the sixth distributed virtual resource block is divided into seven parts- _{P 60} , P ₆₁ , P ₆₂ , P ₆₃ , P ₆₄ , P ₆₅ , P ₆₆ . The physical resource blocks {1, 3, 5, 7, 9, 10, 11} used for distributed transmission are also divided into 7 parts respectively. Then part 0 of the 0th distributed virtual resource block is mapped to part 0 of the first physical resource block, and part 1 of the 0th distributed virtual resource block is mapped to part 1 of the third physical resource block , Part 2 of the 0th distributed virtual resource block is mapped to part 2 of the 5th physical resource block, and part 3 of the 0th distributed virtual resource block is mapped to part 3 of the 7th physical resource block , the 4th part of the 0th distributed virtual resource block is mapped to the 4th part of the 9th physical resource block; the 5th part of the 0th distributed virtual resource block is mapped to the 5th part of the 10th physical resource block ; Part 6 of the 0th distributed virtual resource block is mapped to part 6 of the 11th physical resource block; similarly, part 1 of the 1st distributed virtual resource block is mapped to the 3rd physical resource block Part 2; Part 6 of the 6th distributed virtual resource block is mapped to part 5 of the 11th physical resource block.

If the 0th user is assigned the 0th distributed virtual resource block, then the data of the 0th user will be in the 0th part of the 1st physical resource block, the 1st part of the 3rd physical resource block, and the 5th The second part of the first physical resource block, the third part of the seventh physical resource block, the fourth part of the ninth physical resource block, the fifth part of the tenth physical resource block; the first part of the eleventh physical resource block 6 parts for transmission.

Next, the user terminal receives N _DVRB as 0111, and obtains N _DVRB = 7, and judges that the number of distributed virtual resource blocks is greater than half of the number of physical resource blocks, namely $N_{\mathrm{DVRB}}>\frac{{\mathrm{<figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">N</figure-callout>}}_{\mathrm{PRB}}}{2},$ Then the user terminal calculates the position where the distributed virtual resource block and the localized virtual resource block are mapped to the physical resource block according to the same algorithm as that of the network side.

First, the number of distributed virtual resource blocks is complemented, that is, (N _PRB -N _DVRB )=12-7=5 is obtained; when the number of distributed virtual resource blocks is 5, the distributed virtual resource blocks are mapped to physical The position of the resource block is represented by a bitmap method;

The physical resource block sequence number used for distributed transmission is given by the following formula:

distributed_position(N _PRB -N _DVRB )={i·Step, (i=0, 1, 2,... N _PRB -N _DVRB -1)}={0, 2, 4, 6, 8}

The sequence S is used to represent the position where the virtual resource block is mapped to the physical resource block: the length of the sequence S is 12, and it represents the 0th, the 1st, the 2nd, ..., the Nth _PRB -1 physical resource block in sequence from left to right For the mapping of resource blocks, set the i-th bit (i=0, 1, 2, ... N _PRB -1) of the sequence S to 1, if i is equal to the physical The sequence number of the resource block, and the rest of the positions are 0. Here, S=101010101000. 1 indicates that the physical resource block is mapped by a distributed virtual resource block and is used for distributed transmission, and 0 indicates that the physical resource block is mapped by a localized virtual resource block and is used for localized transmission.

Then, perform 0 and 1 inversion on the sequence S bit by bit, that is, 0 becomes 1, 1 becomes 0, and the sequence S=010101010111 is obtained, and the sequence S is the virtual resource block to the physical resource block when the number of virtual resource blocks is N _DVRB bitmap representation of .

Then, the user terminal will continue to judge its specific position in the physical resource block {0, 2, 4, 6, 8} of distributed transmission, which is also calculated through N _DVRB , and the calculation method is the same as that on the network side, so it will not be repeated here. For the 0th user, it knows that it has been assigned the 0th distributed virtual resource block, then the data of the 0th user will be in the 0th part of the 1st physical resource block, and the 0th part of the 3rd physical resource block Part 1, part 2 of the 5th physical resource block, part 3 of the 7th physical resource block, part 4 of the 9th physical resource block, part 5 of the 10th physical resource block; the 11th Data is received, demodulated and decoded on the subcarriers of the sixth part of the physical resource block.

Embodiment 4: Taking N _PRB =12, N _DVRB =5 as an example, the method of finding the complement set is used for calculation, and the user terminal is in localized transmission.

First, the user terminal sends a CQI (Channel Quality Indication) report;

Then, the network determines the number of distributed virtual resource blocks or the number of localized virtual resource blocks, and sends them to the user terminal. For 5MHz bandwidth, because N _PRB = 12, so N _DVRB ≤ 12, 4-bit information can be used to send the number of distributed virtual resource blocks to the user terminal, N _DVRB = 5, can be directly encoded as 0101 in binary, then The information sent by the network to the user terminal is 0101;

Then, the network sends the user data, and the physical resources occupied by the sent user data can be calculated according to the method described in the present invention;

because $N_{\mathrm{DVRB}}<\frac{{\mathrm{<figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">N</figure-callout>}}_{\mathrm{PRB}}}{2},$ so,

distributed_position(N _DVRB = 5) = {i·Step, (i = 0, 1, 2, ... N _DVRB -1)} = {0, 2, 4, 6, 8}, which is used for distributed transmission The sequence numbers of the physical resource blocks used for localized transmission are {0, 2, 4, 6, 8}, and the sequence numbers of the physical resource blocks used for localized transmission are {1, 3, 5, 7, 9, 10, 11}.

A user terminal using localized transmission will further multiplex physical resource blocks {1, 3, 5, 7, 9, 10, 11}. The method of bit mapping can be used to represent the multiplexing among user terminals of localized transmission. Since there are 7 physical resource blocks for localized transmission, 7 bits of information are used to indicate which physical resource block for localized transmission the user transmits data on. Assume that the 0th user has 2 partial virtual resource blocks, which are mapped to the 1st and 5th physical resource blocks. Then the 0th and 2nd elements in {1, 3, 5, 7, 9, 10, 11} are the physical resource blocks used by the 0th user, then these two bit positions are set to 1, and the rest are set to 0, then The network will send the sequence 1010000 to indicate where the 0th user sent the data. Use 1 to indicate that the physical resource block at this position is used for the user to perform localized transmission, and use 0 to indicate that the physical resource block at this position is used for other users to perform localized transmission. Next, the user terminal receives N _DVRB as 0101, and obtains N _DVRB = 5, and judges that the number of distributed virtual resource blocks is less than half of the number of physical resource blocks, namely $N_{\mathrm{DVRB}}<\frac{{\mathrm{<figure-callout\; id="2"\; label="N\; PRB"\; filenames="A20061007088900422.png"\; state="\{\{state\}\}">N</figure-callout>}}_{\mathrm{PRB}}}{2},$ Then the user terminal calculates the position where the distributed virtual resource block and the localized virtual resource block are mapped to the physical resource block according to the same algorithm as that of the network side.

distributed_position(N _DVRB = 5) = {i·Step, (i = 0, 1, 2, ... N _DVRB -1)} = {0, 2, 4, 6, 8}, which is used for distributed transmission The sequence numbers of the physical resource blocks used for localized transmission are {0, 2, 4, 6, 8}, and the sequence numbers of the physical resource blocks used for localized transmission are {1, 3, 5, 7, 9, 10, 11}.

Then, the user terminal will continue to judge its specific position in the physical resource block {1, 3, 5, 7, 9, 10, 11} of the localized transmission. For the 0th user, it receives 1010000, and it knows that its The 0th and 2nd elements in {1, 3, 5, 7, 9, 10, 11} are assigned physical resource blocks with serial numbers, that is, the 1st and 5th physical resource blocks, then in the 1st Receive data on the subcarriers on the 1st and 5th physical resource blocks, and demodulate and decode them.

Claims (32)

1. A mapping method from a virtual resource block to a physical resource block, comprising steps: a) The user terminal sends a CQI report; b) The number of distributed virtual resource blocks sent by the network; c) The network sends user data; d) The user terminal judges the number of distributed virtual resource blocks and the number of distributed virtual resource blocks The ratio of the number to the number of physical resource blocks is used to determine the location where the distributed virtual resource blocks and localized virtual resource blocks are mapped to the physical resource blocks; e) In the position of the physical resource block where the user terminal is calculated in step d), At least one subcarrier is used to receive its own data. 2. The method according to claim 1, characterized in that said step b) comprises: the network sends the number of localized virtual resource blocks. 3. according to the described method of claim 1, it is characterized in that in step c) the physical resource block position where the network sends user data is that the network is based on the number of distributed virtual resource blocks and the number of distributed virtual resource blocks and the physical resource block The proportion of the number is determined. 4. The method according to claim 1, characterized in that the ratio in step d) includes that the number of distributed virtual resource blocks is less than or equal to one-half of the number of physical resource blocks, and the number of distributed virtual resource blocks The number is greater than half of the number of physical resource blocks. 5. The method according to claim 3, wherein the ratio comprises that the number of distributed virtual resource blocks is less than or equal to 1/2 of the number of physical resource blocks, and the number of distributed virtual resource blocks is greater than the number of physical resource blocks one-half of. 6. The method according to claim 5, wherein when the number of distributed virtual resource blocks is less than or equal to 1/2 of the number of physical resource blocks, the distributed virtual resource blocks and localized virtual resource blocks are mapped to physical The position of the resource block can be calculated according to the number of distributed virtual resource blocks. 7. according to the described method of claim 6, it is characterized in that mapping formula comprises:

Among them, N _PRB represents the number of physical resource blocks, N _DVRB represents the number of distributed virtual resource blocks, Step is an intermediate variable, and the sequence number of physical resource blocks used for distributed transmission is: $\mathrm{<span\; class="notranslate">\; distributed</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; position</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span><span\; class="notranslate">\; \{</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; \&CenterDot;</span>\mathrm{<span\; class="notranslate">\; step</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0,1,2</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \}</span><span\; class="notranslate">\; ,</span>{\mathrm{<span\; class="notranslate">\; ifN</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; \&le;</span>\frac{{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; PRB</span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}}$ Then remove the physical resource blocks used for distributed transmission from all physical resource blocks, and the remaining physical resource blocks are physical resource blocks used for localized transmission, then the sequence numbers of physical resource blocks used for localized transmission are: $\mathrm{<span\; class="notranslate">\; localized</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; position</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; )</span>$ $<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; complement</span>}<span\; class="notranslate">\; \{</span>\mathrm{<span\; class="notranslate">\; distributed</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; position</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \}</span>$ $<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; complement</span>}<span\; class="notranslate">\; \{</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; \&CenterDot;</span>\mathrm{<span\; class="notranslate">\; step</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0,1,2</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \}</span><span\; class="notranslate">\; ,</span>{\mathrm{<span\; class="notranslate">\; if\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; \&le;</span>\frac{{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; PRB</span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}}$ . 8. according to the method described in claim 5, it is characterized in that when the number of distributed virtual resource blocks is greater than 1/2 of the number of physical resource blocks, the position of distributed virtual resource blocks mapped to physical resource blocks is based on The position complement set of the distributed virtual resource block mapped to the physical resource block calculated by the number of distributed virtual resource blocks complementary to the number of distributed virtual resource blocks. 9. The method according to claim 8, characterized in that it comprises the steps of: i) Complement the number of distributed virtual resource blocks, that is, find (N _PRB -N _DVRB ); j) Find the position where the distributed virtual resource block is mapped to the physical resource block when the number of distributed virtual resource blocks is (N _PRB -N _DVRB ); k) For the distributed virtual resource block obtained in step j) is mapped to the bit of the physical resource block The complementary set is the position where the distributed virtual resource block is mapped to the physical resource block when the number of distributed virtual resource blocks is N _DVRB . 10. according to the method for claim 9, it is characterized in that the distributed virtual resource block is mapped to the position of the physical resource block according to the following formula when the number of distributed virtual resource blocks is (N _PRB -N _DVRB ) in step j) calculate:

The physical resource block sequence number used for distributed transmission is given by the following formula: distributed_position(N _PRB -N _DVRB )={i·Step, (i=0, 1, 2, . . . N _PRB -N _DVRB -1)}. 11. according to the method for claim 9, it is characterized in that the number of distributed virtual resource blocks in step k) is N _DVRB when the position that distributed virtual resource blocks are mapped to physical resource blocks is provided by following formula: =complement{(i·Step), (i=0, 1, 2, . . . N _PRB -N _DVRB -1)} Among them, the function complement{} is the operation of taking the complement set, and the full set is {0, 1, 2, ..., N _PRB -1}. 12. The method according to claim 5, characterized in that it comprises the steps of: i) Complement the number of distributed virtual resource blocks, that is, find (N _PRB -N _DVRB ); j) Find the position where the distributed virtual resource block is mapped to the physical resource block when the number of distributed virtual resource blocks is (N _PRB -N _DVRB ), and express it by bit mapping; k) For the bit mapping sequence obtained in step j), reverse 0 and 1 bit by bit, that is, 0 becomes 1, and 1 becomes 0, that is, the number of virtual resource blocks to physical resource blocks when the number of virtual resource blocks is N _DVRB bitmap representation. 13. according to the method for claim 12, it is characterized in that step j) when the number of distributed virtual resource blocks is (N _PRB -N _DVRB ), the position where the distributed virtual resource blocks are mapped to the physical resource blocks can be determined by the following formula gives:

The sequence numbers of physical resource blocks used for distributed transmission are: distributed_position(N _PRB -N _DVRB )={i·Step, (i=0, 1, 2,... N _PRB -N _DVRB -1)} 14. The method according to claim 13, wherein the sequence S is used to indicate the position where the virtual resource block is mapped to the physical resource block: the length of the sequence S is N _PRB , and sequentially represents the 0th and the 1st from left to right, For the mapping of the second, ..., N _PRB -1 physical resource block, set the i-th position of the sequence S to 1, if i is equal to the physical resource block number used for distributed transmission calculated in this step , and the remaining positions are 0. 15. The method according to claim 4, wherein when the number of distributed virtual resource blocks is less than or equal to 1/2 of the number of physical resource blocks, the distributed virtual resource blocks and localized virtual resource blocks are mapped to physical The position of the resource block can be calculated according to the number of distributed virtual resource blocks. 16. The method according to claim 15, characterized in that the mapping formula used is as follows:

Where N _PRB represents the number of physical resource blocks, N _DVRB represents the number of distributed virtual resource blocks, and Step is an intermediate variable, then the sequence number of physical resource blocks used for distributed transmission is given by the following formula: $\mathrm{<span\; class="notranslate">\; distributed</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; position</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span><span\; class="notranslate">\; \{</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; \&Center\; Dot;</span>\mathrm{<span\; class="notranslate">\; step</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0,1,2</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \}</span><span\; class="notranslate">\; ,</span>{\mathrm{<span\; class="notranslate">\; ifN</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; \&le;</span>\frac{{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; PRB</span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}}$ Then remove the physical resource blocks used for distributed transmission in all physical resource blocks, and the remaining physical resource blocks are physical resource blocks used for localized transmission, then the sequence number of physical resource blocks used for localized transmission is given by the following formula out: $\mathrm{<span\; class="notranslate">\; localized</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; position</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; )</span>$ $<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; complement</span>}<span\; class="notranslate">\; \{</span>\mathrm{<span\; class="notranslate">\; distributed</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; position</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \}</span>$ $<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; complement</span>}<span\; class="notranslate">\; \{</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; \&CenterDot;</span>\mathrm{<span\; class="notranslate">\; step</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0,1,2</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \}</span><span\; class="notranslate">\; ,</span>{\mathrm{<span\; class="notranslate">\; if\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; \&le;</span>\frac{{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; PRB</span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}}$ 17. The method according to claim 15, wherein when the number of distributed virtual resource blocks is greater than half of the number of physical resource blocks, the position where the distributed virtual resource blocks are mapped to the physical resource blocks is based on The position complement set of the distributed virtual resource block mapped to the physical resource block calculated by the number of distributed virtual resource blocks complementary to the number of distributed virtual resource blocks. 18. The method of claim 17, comprising the steps of: i) Complement the number of distributed virtual resource blocks, that is, find (N _PRB -N _DVRB ); j) Find the position where the distributed virtual resource block is mapped to the physical resource block when the number of distributed virtual resource blocks is (N _PRB -N _DVRB ); k) Complementary set for the location where the distributed virtual resource block mapped to the physical resource block obtained in step j) is the position where the distributed virtual resource block is mapped to the physical resource block when the number of distributed virtual resource blocks is N _DVRB . 19. according to the method for claim 18, it is characterized in that when the number of distributed virtual resource blocks is (N _PRB -N _DVRB ) in step j), the position that distributed virtual resource blocks are mapped to physical resource blocks can follow the following Formula calculation:

The physical resource block sequence number used for distributed transmission is given by the following formula: distributed_position(N _PRB -N _DVRB )={i·Step, (i=0, 1, 2, . . . N _PRB -N _DVRB -1)}. 20. according to the described method of claim 18, it is characterized in that the number of distributed virtual resource blocks in step k) is N _DVRB when the position that distributed virtual resource blocks are mapped to physical resource blocks can be given by following formula: distributed_position(N _DVRB ) ＝complement{distributed_position(N _PRB -N _DVRB )} =complement{(i·Step), (i=0, 1, 2, . . . N _PRB -N _DVRB -1)} Among them, the function complement{} is the operation of taking the complement set, and the full set is {0, 1, 2, ..., N _PRB -1}. 21. The method of claim 4, comprising the steps of: i) Complement the number of distributed virtual resource blocks, that is, find (N _PRB -N _DVRB ); j) Find the position where the distributed virtual resource block is mapped to the physical resource block when the number of distributed virtual resource blocks is (N _PRB -N _DVRB ), and express it by bit mapping; k) For the bit mapping sequence obtained in step j), reverse 0 and 1 bit by bit, that is, 0 becomes 1, and 1 becomes 0, that is, the number of virtual resource blocks to physical resource blocks when the number of virtual resource blocks is N _DVRB bitmap representation. 22. according to the method for claim 21, it is characterized in that step j) when the number of distributed virtual resource blocks is (N _PRB -N _DVRB ), the position where the distributed virtual resource blocks are mapped to the physical resource blocks can be determined by the following formula gives:

The sequence numbers of physical resource blocks used for distributed transmission are: distributed_position(N _PRB -N _DVRB )={i·Step, (i=0, 1, 2,...N _PRB -N _DVRB -1)} 23. The method according to claim 22, wherein the sequence S is used to indicate the position where the virtual resource block is mapped to the physical resource block: the length of the sequence S is N _PRB , and the sequence S represents the 0th and the 1st from left to right, For the mapping situation of the second, ..., N _PRB -1 physical resource block, the i-th position of the sequence S is set to 1, if i is equal to the physical resource block number used for distributed transmission calculated in this step , and the remaining positions are 0. 24. The method according to claim 1, characterized in that the position where the distributed virtual resource block is mapped to the physical resource block in step d) may be related to the current subframe number. 25. The method according to claim 24, wherein when the number of distributed virtual resource blocks is less than or equal to 1/2 of the number of physical resource blocks, the position where the distributed virtual resource blocks are mapped to the physical resource blocks can be based on the following The above formula is calculated:

Wherein N _PRB represents the number of physical resource blocks, N _DVRB represents the number of distributed virtual resource blocks, and Step is an intermediate variable. Then the physical resource block number used for distributed transmission is: $\mathrm{<span\; class="notranslate">\; distributed</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; position</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; )</span>$ $<span\; class="notranslate">\; =</span><span\; class="notranslate">\; \{</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; \&CenterDot;</span>\mathrm{<span\; class="notranslate">\; step</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; sub</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; frame</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; number</span>}<span\; class="notranslate">\; )</span>\mathrm{<span\; class="notranslate">\; mod</span>}{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; PRB</span>}}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; I</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0,1,2</span>}<span\; class="notranslate">\; ,</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span>{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \}</span><span\; class="notranslate">\; ,</span>{\mathrm{<span\; class="notranslate">\; if\; N</span>}}_{\mathrm{<span\; class="notranslate">\; DVRB</span>}}<span\; class="notranslate">\; \&le;</span>\frac{{\mathrm{<span\; class="notranslate">\; N</span>}}_{\mathrm{<span\; class="notranslate">\; PRB</span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}}$ . 26. The method according to claim 24, wherein when the number of distributed virtual resource blocks is greater than 1/2 of the number of physical resource blocks, the position where the distributed virtual resource blocks are mapped to the physical resource blocks is based on The distributed virtual resource block calculated by the number of distributed virtual resource blocks complementary to the number of distributed virtual resource blocks is mapped to the position complement set of the physical resource block. Specifically include steps: i) Complement the number of distributed virtual resource blocks, that is, find (N _PRB -N _DVRB ); j) Find the position where the distributed virtual resource block is mapped to the physical resource block when the number of distributed virtual resource blocks is (N _PRB -N _DVRB ); For step j), the distributed virtual resource block is mapped to the position complement set of the physical resource block, which is the position where the distributed virtual resource block is mapped to the physical resource block when the number of distributed virtual resource blocks is N _DVRB , the complete set is {0, 1, 2, ..., N _PRB -1}. 27. The method according to claim 26, characterized in that when the number of distributed virtual resource blocks in step j) is (N _PRB -N _DVRB ), the position where the distributed virtual resource blocks are mapped to the physical resource blocks can be as follows Formula calculation:

distributed_position(N _PRB -N _DVRB )={i·Step, (i=0, 1, 2,...N _PRB -N _DVRB -1)} 28. according to the described method of claim 26, it is characterized in that in step k), the position that distributed virtual resource block is mapped to physical resource block can be calculated according to the following formula:

distributed_position(N _DVRB ) ＝inverse{distributed_position(N _PRB -N _DVRB )} =inverse{(i·Step), (i=0, 1, 2, . . . N _PRB -N _DVRB -1)} 29. A network device for mapping virtual resource blocks to physical resource blocks, including: a radio frequency unit, which is used to convert the baseband signal of the baseband processing unit into a high-frequency signal and send it out, and convert the received high-frequency signal into a baseband signal , and sent to the baseband processing unit; A baseband processing unit for processing baseband signals; The resource control unit is used to control the physical resources used by the baseband processing unit when sending data. 30. The network device according to claim 29, wherein the resource control unit is used to determine the location where the distributed virtual resource block and the localized virtual resource block are mapped to the physical resource block. 31. A user terminal device from a virtual resource block to a physical resource block, comprising: The radio frequency unit is used to convert the baseband signal of the baseband processing unit into a high frequency signal and send it out, and convert the received high frequency signal into a baseband signal and send it to the baseband processing unit; The baseband processing unit is used for processing the baseband signal and controlling the display; The resource allocation subunit is used to control the data demodulation subunit; The data demodulation subunit is used for demodulation and decoding of baseband data; a keyboard for inputting user commands; monitor; The processor is used to interpret the commands input by the user and exchange information with the baseband processing unit, mainly completing the functions of L2 and L3. 32. The user terminal device according to claim 31, characterized in that the resource allocation subunit is configured to determine the positions where distributed virtual resource blocks and localized virtual resource blocks are mapped to physical resource blocks.

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