Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04B—TRANSMISSION
  • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
  • H04B1/69—Spread spectrum techniques
  • H04B1/713—Spread spectrum techniques using frequency hopping
  • H04B1/7136—Arrangements for generation of hop frequencies, e.g. using a bank of frequency sources, using continuous tuning or using a transform
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L5/00—Arrangements affording multiple use of the transmission path
  • H04L5/0001—Arrangements for dividing the transmission path
  • H04L5/0003—Two-dimensional division
  • H04L5/0005—Time-frequency
  • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
  • H04L5/0012—Hopping in multicarrier systems
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L5/00—Arrangements affording multiple use of the transmission path
  • H04L5/003—Arrangements for allocating sub-channels of the transmission path
  • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals

Definitions

• the present invention relates to the field of communications, and in particular to a data transmission method and apparatus.
• LTE Long Term Evolution
• the downlink uses Orthogonal Frequency Division Multiple Access (OFDM) technology
• the uplink uses a single carrier-frequency.
• SC-FDMA Single-Carrier-Multiple Access
• ICI Inter-Cell Interference
• UTE adopts some anti-interference techniques, such as Inter-Cell Interference Cancellation (ICIC).
• the downlink ICIC technology implements a downlink interference pre-alert function based on the method of the relatively narrow-band transmit power (RNTP) limitation of the evolved Node B (eNodeB), and enhances the physical downlink traffic channel ( Physical Downlink Shared Channel (referred to as PDSCH) coverage performance; uplink (High Interference Indication/Overload Indication, HII/OI) based ICIC technology, enhanced physical uplink traffic channel (Physical Uplink Shared Channel, PUSCH for short) Coverage performance.
• RTP transmit power
• eNodeB evolved Node B
• PDSCH Physical Downlink Shared Channel
• uplink High Interference Indication/Overload Indication, HII/OI
• PUSCH Physical Uplink Shared Channel
• MIMO Multiple Input Multiple Output
• MIMO technology can improve the coverage performance and capacity performance of LTE systems through space diversity, spatial multiplexing and beamforming technologies, especially based on Coordinated Multiple Point (CoMP) technology developed by MIMO technology.
• CoMP Coordinated Multiple Point
• MIMO technology and CoMP technology rely heavily on the measurement and feedback of channel state information.
• the wireless system measures the wireless channel in the current and future time interval T, the terminal with very low signal-to-noise ratio (User Equipment, UE for short). And the feedback is still the bottleneck. - The more complete and accurate the feedback, the larger the feedback, the challenge to the capacity and coverage distance. On the other hand, for the fast-changing channel, the feedback delay accuracy is difficult to guarantee.
• Open-loop MIMO technology can achieve diversity gain on the basis of saving resource allocation overhead and channel feedback overhead.
• resource frequency hopping technology due to the reduced dependence of open-loop technology on channel feedback, it is generally combined with resource frequency hopping technology.
• the LTE system introduces a Transmission Time Interval (Bundling) technology.
• ' ⁇ Bimd!ing technology forms different redundancy versions for the entire data packet by channel coding; different redundancy versions are transmitted in consecutive multiple frames, and transmissions in multiple TTIs instead of consecutive are also evaluated; TTI Bundling technology can improve the coverage of LTE systems by occupying more transmission resources and obtaining coding gain and diversity gain to obtain higher received energy and link signal-to-noise ratio.
• ⁇ Bundling technology Since ⁇ Bundling technology is used to reduce coverage efficiency in exchange for performance, it is mainly used for terminals with very low signal-to-noise ratio. For UEs with very low signal-to-noise ratio, the coverage performance can be improved by diversity techniques, such as frequency diversity gain by frequency hopping. . In the existing standard technology, TTI Bundling and the frequency technology can simultaneously make 3 ⁇ 4. TE technology supports two types of frequency hopping, type 1 frequency hopping and type 2 frequency hopping. Type 1 hopping is independent of the number of subbands, while type 2 is related to the number of subbands.
• the system can obtain more frequency hopping positions by setting the number of subbands, thus obtaining more frequency diversity gain, but in the ⁇ :: ⁇ system, the final frequency hopping position in Type 2 frequency hopping passes random sequence and random sequence.
• the function is determined, so; even in the most subband configuration, it is not always possible to get the most hopping position. For example, as shown in FIG. 1, in the Type 2 sub-inter-frequency hopping method, since the frequency hopping is in a frame period, the position in every 10 sub-bands is repeated, resulting in subframe 0 (relative sub-frame number) and The child 3 ⁇ 4 10 (relative subframe number) will allocate the same logical resource corresponding to the same physical resource block.
• Figure 2 shows the case of the frequency hopping method between 3 ⁇ 4 ⁇ 6 2 and the sub-turn, which is similar to Figure 1.
• the present invention provides a data transmission method and apparatus for solving at least the problem that the frequency diversity gain of the data transmission method in the related art is relatively low, resulting in a relatively small coverage of data transmission.
• a data transmission method including: determining, by using a frequency hopping manner, a frequency domain location of a physical resource block in a time slot for transmitting data, where the random sequence of the frequency hopping mode passes The cell identifier and the frame sequence number are initialized; and the data is transmitted on the determined time-frequency resource corresponding to the frequency domain location of the physical resource block.
• the random sequence is initialized by ⁇ + ⁇ odin f , iO) ⁇ where 11 is the cell identifier and is the frame number.
• determining a frequency domain position of a physical resource block in a time slot for transmitting data by using a frequency hopping method includes: determining a frequency domain position of the time slot transmission data by using the following formula :
• the frequency hopping is determined by the following way: Intra and inter-sisbfraioe hopping preferably, said ⁇ .
• ⁇ is determined by the following formula:
• mod is the modulo function
• ⁇ is the number of subbands
• c is the random sequence
• k is the sequence number of the random sequence -
• k is Non-negative integer.
• the determination is made by the following formula: i mod 2 N ib -- 1 and intra and inter ⁇ subframe hopping
• the radio resource control RRC layer message indicates: the resource grant message indication; the predefined preferably, ⁇ is determined by the following formula: "ft f
• a data transmission apparatus comprising: a determining module, configured to pass The frequency hopping mode determines a frequency domain location of a time slot ⁇ physical resource block used for transmitting data, where the random sequence of the frequency hopping mode is initialized by a cell identifier and a frame sequence; and a transmission module is set to the determined physical medium The data is transmitted on the time-frequency resource corresponding to the frequency domain location of the resource block.
• the determining module determines the random sequence + mod i / '10) by using the following formula, where is a cell identifier, which is a frame sequence number.
• the random sequence of the frequency hopping mode is initialized by the cell identifier and the frame number, and the frequency domain position of the physical resource block of the time slot ⁇ of the transmitted data is determined according to the frequency hopping manner, so that the actual frequency hopping position can follow
• the number of sub-bands increases and increases, which solves the problem that the coverage of data transmission is relatively small due to the low frequency diversity gain in the related art, and the frequency diversity gain of the data is improved.
• FIG. 1 is a schematic diagram of inter-subframe resource hopping according to type 2 of the related art
• FIG. 2 is a schematic diagram of inter-subframe and intra-subframe resource hopping according to type 2 of the related art
• FIG. 3 is a schematic diagram of resource hopping according to the present invention
• FIG. 4 is a block diagram showing the structure of a data transmission apparatus according to an embodiment of the present invention:
• BEST MODE FOR CARRYING OUT THE INVENTION hereinafter, the present invention will be described in detail with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.
• the present preferred embodiment provides a data transmission method.
• FIG. 3 is a flowchart of a data transmission method implemented in accordance with the present invention. As shown in FIG.
• the method includes the following steps S302 to S304.
• the meaning of data transmission here includes at least: data transmission and data reception.
• Step S302 Determine a frequency domain location of a physical resource block in a time slot for transmitting data by using a frequency hopping manner, where the random sequence of the frequency hopping mode is initialized by using a cell identifier and a frame sequence number.
• the frequency domain position of the physical resource block in the time slot in which the data is transmitted is determined by the frequency hopping method, the number of the above-mentioned frequency domain positions can be increased by 3 ⁇ 4 as the number of sub-bands increases.
• Step S304 Transmit data on the determined daily T-frequency resource corresponding to the frequency domain location of the physical resource block.
• the frequency domain location of the physical resource block of the time slot ⁇ for transmitting data is determined by using a frequency hopping method, wherein the random sequence of the frequency hopping mode is initialized by the cell identifier and the frame number, and the cell standard is implemented.
• the identification and frame number initialize a random sequence of the frequency hopping mode, and determine the frequency domain position of the physical resource block in the time slot of the transmitted data according to the frequency hopping mode, so that the actual frequency hopping position can increase with the number of subbands.
• step S304 can determine the frequency domain location of the data transmitted by the time slot ns by the following formula
• ⁇ ⁇ is the virtual resource block offset index
• W is the frequency hopping offset
• mod is the modulo operation
• ⁇ is the number of subbands
• S is the slot number
• i is the frequency hopping variable.
• the preferred embodiment can increase the gain of the frequency diversity. Preferably, it is determined by the following formula:
• ⁇ '- is the number of subbands
• c is the random sequence
• k is the sequence number of the random sequence
• k is a non-negative integer (preferably, determined by the following formula: ⁇ mod 2 , ⁇ V Sb - 1 and intra and inter - subframe hopping
• Mode 1 Radio Resource Control (RRC) layer message indication.
• Method 2 Resource Grant Message Indication ⁇
• RRC Radio Resource Control
• the total number of resource blocks in a slot corresponding to the uplink bandwidth, ⁇ is a frequency hopping offset, and J is a rounding operation on y.
• the frequency hopping offset is a rounding operation on the X.
• i corresponds to the intra-subframe hopping and the inter-subband hopping, i can be determined as follows;
• V ' is the cell identifier, which is the frame number
• V ' is the cell identifier, which is the frame number
• the different cells ⁇ must be different.
• ⁇ iY ' 1 + mCK H / ' iQ
• It is a function of ⁇ ' and / ⁇ , or a function of ⁇ , and the number of sub-frames, which does not affect the method and principle of the invention.
• Initialization of pseudo-random sequences by e ⁇ means directly ⁇ ⁇ or according to A generates parameters as input parameters in the process of generating a random sequence.
• a random sequence of length M ⁇ ⁇ ) , 11 - ⁇ 3 '- ' ⁇ ⁇ — 3 is defined as follows: c(n) - ( ⁇ ( ⁇ N c ) - x 2 (n + N c )) mod2
• a data transfer software is provided for m lines of the technical solutions described in the above embodiments and preferred embodiments.
• a storage medium is provided, the storage medium ⁇ storing the above data transmission software, including but not limited to: an optical disk, a floppy disk, a hard disk, a rewritable memory, and the like.
• the embodiment of the present invention further provides a data transmission device, which can be used to implement the above data transmission method and a preferred implementation manner, which have been described, and will not be described again.
• the module to be explained.
• the term "module” may implement a combination of software and/or hardware of a predetermined function.
• the systems and methods described in the following embodiments are preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
• the meaning of data transmission here includes at least: data transmission and data reception.
• 4 is a structural block diagram of a data transmission apparatus according to an embodiment of the present invention. As shown in FIG. 4, the apparatus includes: a determination module 42, a transmission module 44, and the above structure is described in detail below.
• the determining module 42 is configured to determine, by using a frequency hopping method, a frequency domain position of the physical resource block in the time slot of the data to be sent, where the random sequence of the frequency hopping mode is initialized by the cell identifier and the frame number; the transmission module 44, the connection
• the determining module 42 is configured to transmit data on the time-frequency resource corresponding to the frequency domain location of the physical resource block determined by the determining module 42.
• the determining module 42 determines the random sequence mt ⁇
• the preferred embodiment provides a frequency hopping manner by using an enhanced uplink resource, which can acquire more frequency diversity gains without increasing control overhead.
• the transmitting end determines the frequency domain location of the physical resource block in the time slot for transmitting data by frequency hopping, and initializes the random sequence C in the frequency by using the following parameters: cell identifier, frame number. More excellent, 3 ⁇ 4 ⁇ '+ brain ⁇ , 10).
• the sub-band Hopping function passes i
• the physical resource blocks used for uplink transmission in the time slot are determined according to the following formula:
• the sub-band number is configured by RRC layer signaling ( preferably, the number of resource blocks in the sub-band is ⁇
• TM is a virtual resource
• the physical resource block is determined by: ⁇ B - / 2 ⁇ N
• the preferred embodiment 2 preferred embodiment provides a data transmission method
• FIG. 5 is an enhanced type 2 implementation according to the present invention.
• data transmission can be performed according to the following formula: Physical resource block offset index:
• Table 1 Schematic diagram of the physical resource block index of time slots 0 ⁇ 39
• the physical resource block index ⁇ of time slots 0 to 39 is as shown in Table 2.
• FIG. 6 is a schematic diagram of enhanced Type 2 inter-subframe and intra-subframe resource hopping according to an implementation of the present invention.
• subframe 0 and Subframe 8 is the resource location occupied by the first transmission and retransmission of data
• subframe 2 and subframe 10 are the resource locations of the first transmission and the retransmission of data.
• data transmission can be performed according to the following formula: Physical resource block offset index:
• the subband hopping function (/):
• the position of the physical resource block corresponding to the subframe o and the subframe lo does not change.
• a data transmission method and apparatus are provided, which overcomes the related art ⁇ .
• the actual frequency hopping position does not necessarily increase as the number of subbands increases, resulting in the problem that sufficient frequency diversity gain cannot be obtained, and the frequency diversity is improved. Gain, and no increase in control overhead. It should be noted that these technical effects are not all of the above embodiments, and some technical effects are obtained by some preferred embodiments. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general computing device, which can be concentrated on a single + computing device, or distributed among multiple computing devices.
• the network may be implemented by program code executable by a computing device, which may be stored in a storage device by a computing device, or separately fabricated into individual integrated circuit modules, or Multiple modules or steps in the f-gate are fabricated as a single integrated circuit module.
• a computing device which may be stored in a storage device by a computing device, or separately fabricated into individual integrated circuit modules, or Multiple modules or steps in the f-gate are fabricated as a single integrated circuit module.

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• 2012
  • 2012-07-10 CN CN201210237392.4A patent/CN103546195B/zh not_active Expired - Fee Related
• 2013
  • 2013-07-09 WO PCT/CN2013/079043 patent/WO2014008847A1/fr not_active Ceased

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