WO2010133122A1

WO2010133122A1 - Bearing method and device for logical channel of multimedia broadcast multicast service

Info

Publication number: WO2010133122A1
Application number: PCT/CN2010/072169
Authority: WO
Inventors: 苟伟; 王斌
Original assignee: 中兴通讯股份有限公司
Priority date: 2009-05-22
Filing date: 2010-04-23
Publication date: 2010-11-25
Also published as: CN101895821A; CN101895821B

Abstract

A bearing method for Multimedia Broadcast Multicast Service (MBMS) Logical Channel is disclosed. It comprises: MBMS Control Channel (MCCH) is borne in sub-frames taken an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Physical Resource Block (PRB) or a sub-carrier or a sub-carrier cluster as a unit. At the same time, a bearing device for Multimedia Broadcast Multicast Service (MBMS) Logical Channel is disclosed. It comprises: a first bearing unit is used for bearing MCCH in sub-frames taken an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Physical Resource Block (PRB) or a sub-carrier or a sub-carrier cluster as a unit. With the solution of bearing MCCH in sub-frames of wireless frames in the form of time domain or frequency domain or PRB, it makes resource distribution more flexible and maximizes resource utilization, thus promoting spectrum efficiency of the system.

Description

Method and device for carrying logical channel of multimedia broadcast multicast service

The present invention relates to a technology for carrying a logical channel of a Multimedia Broadcast Multicast Service (MBMS), and more particularly to a method and apparatus for carrying a logical channel of a multimedia broadcast multicast service in a Long Term Evolution (LTE) system. Background technique

In order to effectively utilize mobile network resources, the 3rd Generation Partnership Project (3GPP) proposes an MBMS service, which is a technology for transmitting data from one data source to multiple targets, and realizes network resources. Sharing improves the utilization of network resources. MBMS defined by 3GPP can not only realize plain text low-rate message class multicast and broadcast, but also realize high-speed multimedia service broadcast and multicast, providing a variety of rich video, audio and multimedia services, which undoubtedly conforms to future mobile The trend of data development provides a better business prospect for the development of 3G.

In the LTE system, the MBMS service can be transmitted in a hybrid carrier mode. The hybrid carrier mode means that the unicast service (Unicast) and the multicast service (MBMS service) are transmitted on the same carrier in a time-division manner, and the minimum unit of time-division bearer is transmitted. For sub-frames. Currently, LTE specifies that a two-level method is used to configure radio frames and subframes that carry MBMS services. The details are as follows:

The first level implements the radio frame configuration carrying the MBMS, and satisfies the following equation SFN mod radioFrameAllocationPeriod = radioFrameAllocationOffset. Among them, SFN is the abbreviation of System Frame Number system frame number, that is, the system's wireless frame number, from 0 to 1023. radioFrameAllocationPeriod represents an MBSFN radio frame period, which can take any one of {1, 2, 4, 8, 16, 32}. The radioFrameAllocationOffset indicates an offset of the MBSFN radio frame, which is an integer and is smaller than the value of the selected MBSFN radio frame period, and is greater than or equal to zero. Mod indicates that the SFN modulo or spare the radioFrameAllocationPeriod. The above described MBMS radio frame is configured as an MBSFN radio frame.

The second stage implements which subframes in the MBMS radio frame carry the MBMS service, and uses the bitmap method, because the subframes #0, #4, #5 in the FDD (Frequency Division Duplex) mode are specified in the LTE. #9 cannot carry the MBMS service. In the time division duplex mode (TDD, Time Division Duplex), the subframes #0, #1, #5, and #6 cannot carry the MBMS service. Therefore, the 6-bit bitmap is used to describe which bearers of the remaining 6 subframes. MBMS business. The subframe configuration of the MBMS service carried in each MBSFN radio frame is the same. Since the two-level configuration signal is transmitted to the user terminal on the BCCH, the subframe configuration in the MBSFN radio frame within the modification period of each Broadcast Control Channel (BCCH, Broadcast Control Channel) cannot be changed. The above-mentioned subframe of the MBMS service in the MBSFN radio frame is called an MBSFN subframe, which is also called a multicast subframe.

The first or two Orthogonal Frequency Division Multiplexing (OFDM) symbols of the MBSFN subframe are used to transmit control information of a Unicast service, also called a physical downlink control channel (PDCCH, Physical Downlink Control). Channel ), the remaining resources in the subframe are used to send MBMS services or other services.

The MBSFN radio frame and the MBSFN sub-frame are configured by the existing two-stage method. The configured MBSFN sub-frame constitutes the physical resource for actually transmitting the MBMS service, that is, the physical multicast channel (PMCH, Physical Multicast Channel). ). The PMCH carries a Multicast Channel (MCH) channel. The MCH consists of a series of MBSFN subframes configured by a two-level configuration method. It is currently not excluded in the LTE system that the MCH can be divided into multiple MCHs by certain rules. For example, a part of the MBSFN subframe in the MBSFN subframe configured by the two-stage system is used as MCH 1 , and the remaining MBSFN subframe is taken as MCH2.

Currently, the LTE R9 specifies that the MBMS Control Channel (MCCH, MBMS Control Channel) is mapped to the MCH, but no specific bearer or mapping method is given. Summary of the invention

In view of this, the main object of the present invention is to provide a method and apparatus for carrying a multimedia broadcast multicast service logical channel, so that the MBMS logical channel is better carried into the LTE system frame.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

A method for carrying a logical channel of a multimedia broadcast multicast service includes:

Multimedia Broadcast Multicast Service MBMS Control Channel The MCCH carries OFDM symbols in orthogonal frequency division, or in a sub-frame in units of physical resource blocks PRB, or in subcarriers, or in subcarrier clusters.

Preferably, the method further includes:

The information of the resources allocated for the MCCH data is carried in one or more of the set PRBs, or subcarriers, or subcarrier clusters.

Preferably, the method further includes:

In the set one or more PRBs, or subcarriers, or subcarrier clusters, information for resources allocated for MTCH data is carried.

Preferably, when the MCCH is carried in units of OFDM symbols, the MCCH is carried in the OFDM symbol carrying the unicast service control information in the subframe, or the MCCH is carried in the subframe in the OFDM symbol immediately adjacent to the unicast service control information. Or more than two consecutive OFDM symbols.

Preferably, the method further includes:

One or more of the MBMS scheduling channel MSCH, the MBMS transmission channel MTCH, and the MBMS notification indication information are performed in the remaining resources of the subframe carrying the MCCH in units of at least one of an OFDM symbol, a PRB, a subcarrier, and a subcarrier cluster. Hosted.

Preferably, when the MCCH is carried in units of subcarriers or subcarriers, the carried subcarriers or subcarrier clusters are continuous or discrete in the frequency domain.

Preferably, the subcarrier or subcarrier cluster carrying the MCCH occupies one or more links in the time domain. Continued OFDM symbols.

Preferably, the method further includes:

One or more of the MSCH, MTCH, and MBMS notification indication information are carried in the remaining resources of the subframe carrying the MCCH in units of at least one of the PRB, the subcarrier, and the subcarrier cluster.

Preferably, when the MCCH is carried in units of PRBs, the MCCH is carried in the PRB corresponding to the first six or the first seven OFDM symbols in the subframe, or the MCCH is carried in the pair of PRBs in the subframe, the pair is The PRB is two consecutive PRBs in the same time domain in the frequency domain of the subframe.

Preferably, the PRB carrying the MCCH is continuous or discrete in the frequency domain.

Preferably, the method further includes:

One or more of the MSCH, MTCH, and MBMS notification indication information are carried in the remaining resources of the subframe carrying the MCCH in units of PRB.

Preferably, the subframe includes a multicast subframe or a unicast subframe.

One or more of the MSCH, MTCH, and MBMS notification indication information are carried in the subframe in units of at least one of an OFDM symbol, a PRB, a subcarrier, and a subcarrier cluster. The subframe includes a multicast subframe or a unicast subframe.

A bearer for a logical channel of a multimedia broadcast multicast service, comprising:

And a first bearer unit, configured to carry the MCCH in an OFDM symbol, or in a PRB, or in a subcarrier, or in a subcarrier cluster in a subframe.

Preferably, the first bearer unit further carries information of resources allocated for the MCCH data in the set one or more PRBs, or subcarriers, or subcarrier clusters;

Or the first bearer unit further carries information of resources allocated for the MTCH data in the set one or more PRBs, or subcarriers, or subcarrier clusters.

Preferably, when the first bearer unit carries the MCCH in units of OFDM symbols, The MCCH is carried in the OFDM symbol carrying the unicast service control information in the subframe, or the MCCH is carried in one or more consecutive OFDM symbols of the OFDM symbol in the subframe immediately adjacent to the unicast service control information.

Preferably, the device further includes:

a second bearer unit, configured to: one or more of the MSCH, the MTCH, and the MBMS notification indication information, the remaining resources in the subframe that carries the MCCH, in units of at least one of an OFDM symbol, a PRB, a subcarrier, and a subcarrier cluster Carry in.

Preferably, when the first bearer unit carries the MCCH in units of subcarriers or subcarriers, the carried subcarriers or subcarrier clusters are continuous or discrete in the frequency domain.

Preferably, the subcarriers or subcarriers carrying the MCCH occupy one or more consecutive OFDM symbols in the time domain.

Preferably, the device further includes:

a second bearer unit, configured to carry one or more of the MSCH, the MTCH, and the MBMS notification indication information in a remaining one of the PRB, the subcarrier, and the subcarrier cluster in the remaining resources of the subframe that carries the MCCH .

Preferably, when the first bearer unit carries the MCCH in units of PRB, the MCCH 7 is carried in the PRB corresponding to the first six or the first seven OFDM symbols in the subframe, or the MCCH is carried in the subframe in pairs. In the PRB, the paired PRBs are two consecutive PRBs in the same time domain in the frequency domain of the subframe.

Preferably, the device further includes:

And a second bearer unit, configured to carry one or more of the MSCH, MTCH, and MBMS notification indication information in a PRB-based resource in a remaining resource of a subframe that carries the MCCH.

In the present invention, the logical channel such as the MCCH is carried in the subframe in the radio frame in the form of the time domain, the frequency domain, and the PRB, so that the resource allocation is more flexible, and the logical channel bearer can be used for the resource. The utilization of the source is maximized, thereby increasing the spectral efficiency of the system. DRAWINGS

1 is a schematic diagram of a subframe structure when a MCCH is carried in units of PRBs according to the present invention; FIG. 2 is a schematic diagram of a subframe structure when an MCCH is carried in units of OFDM symbols according to the present invention; FIG. 3 is a subcarrier or subcarrier cluster of the MCCH according to the present invention; Schematic diagram of the subframe structure when the unit is carried;

4 is a schematic diagram of information of a resource allocated for MCCH and MTCH data according to the present invention; FIG. 5 is a schematic structural diagram of a first embodiment of a bearer for a logical channel of a multimedia broadcast multicast service according to the present invention;

6 is a schematic structural diagram of a second embodiment of a bearer device for a logical channel of a multimedia broadcast multicast service according to the present invention;

FIG. 7 is a schematic structural diagram of a third embodiment of a bearer device for a logical channel of a multimedia broadcast multicast service according to the present invention.

detailed description

The basic idea of the present invention is: carrying data of a logical channel such as an MCCH into a subframe in a radio frame in the form of a time domain, a frequency domain, and a PRB (the subframe may be an MBSFN subframe constituting the MCH, or may be a single The sub-frame corresponding to the broadcast service makes the resource allocation more flexible, and the resource utilization can be maximized in the logical channel bearer, thereby improving the spectrum efficiency of the system. The MCCH according to the present invention may be an MCCH transmitted in a multi-cell mode (an MCCH mapped on the MCH) or an MCCH transmitted in a single-cell mode (mapped on a Physical Downlink Shared CHannel). MCCH). Further, the present invention also provides a method for transmitting information of allocated resources, which is used for allocating resources in a subframe in a time domain, a frequency domain, and a PRB for a logical channel such as an MCCH. Letter The information is sent to the receiving end. The data information transmission manner may be such that the data reception of the logical channel such as the MCCH is independent of the PDCCH of the unicast service (generally, the information of the allocated resource is transmitted through the PDCCH, but the PDCCH is only used for the unicast service, and the logic such as the MCCH. The channel is the data of the multicast service, so that the multicast service does not affect the transmission of the resource information of the unicast service on the PDCCH.

The present invention will be further described in detail below with reference to the accompanying drawings.

In the present invention, since the MCCH is currently defined as a logical channel in LTE, the logical channel is first mapped to the transport channel according to the LTE, and the transport channel is remapped to the physical channel. Therefore, in the present invention, unless otherwise specified, MCCH indicates data on the physical channel corresponding to the MCCH, and "MCCH" indicates "data of MCCH". For example, the MCCH is carried in a subframe in a PRB manner. It is understood that the data of the MCCH is carried in the subframe in the PRB manner. If LTE defines a corresponding physical channel for the MCCH (H is not designated as PMCCH), the PMCCH can be considered to be carried in the subframe in the PRB manner.

Embodiment 1

This example describes the case where the MCCH is carried in a subframe based on a Physical Resource Block (PRB). FIG. 1 is a schematic diagram of a subframe structure when a MCCH is carried in a PRB unit according to the present invention. As shown in FIG. 1 , a PRB is composed of a time-frequency two-dimensional resource, and has 12 subcarriers in a frequency domain direction, and a time domain direction is 6 OFDM symbols (for a subframe of a standard cyclic prefix (CP, Cyclic Prefix), the PRB size is 14 subcarriers, and the time direction is 7 OFDM symbols). As specified in the LTE system, the control information of the first one or two OFDM symbols of the MBSFN subframe of each extended CP carrying the unicast service is also referred to as a PDCCH. Therefore, for a PRB including the first one or two OFDM symbols, it is necessary to remove the resources belonging to the first one or two OFDM symbols in actual use. The PRB in one subframe is determined by the system bandwidth and the subcarrier spacing (the subcarrier spacing of the unicast service in the LTE system is 15 kHz). E.g In a 20M bandwidth system, except for the reserved guard interval, there are 1200 available subcarriers, then there are 200 PRBs in one subframe. These PRBs are numbered according to certain rules. The two PRBs that are consecutive in the same time and frequency in one subframe are referred to as a pair of PRBs. When scheduling a PRB, a pair of PRBs is used as a scheduling unit.

In this example, the MCCH is carried in units of PRB. Specifically, the system determines the number of PRBs according to the amount of data in the MCCH, or according to the maximum amount of data in the MCCH; and allocates the PRBs of the specific 7-carrier MCCH according to the determined number of PRBs, and may be paired PRBs at this time. The bearer may be carried in units of a single PRB, and the above configuration may be sent to the user terminal by corresponding signaling; the data in the MCCH is mapped to the allocated PRB for transmission. When the MCCH is carried in units of a single PRB, it is preferably carried in the PRB corresponding to the first six OFDM symbols (the subframes of the standard CP are the first seven OFDM symbols). Whether the MCCH is carried in units of a pair of PRBs or the MCCHs are carried in units of a single PRB, the PRBs carrying the MCCHs are preferably continuous in the frequency domain, and may of course be discrete.

The data volume of the MCCH is generally fixed, or the maximum amount of data is determined. Then, the number of PRBs used to carry the MCCH can be fixed during implementation, and some PRBs are fixed to carry the MCCH. The advantage of this is that when the PRB carrying the MCCH is fixed, it can be stored as configuration information in the user terminal. The network side does not need to temporarily allocate the PRB carrying the MCCH, nor does it need to notify the user terminal which PRBs carry the MCCH, and the user terminal can know. Which of the PRBs in the subframe carries the MCCH, and directly receives the MCCH on the PRB that is agreed in the subframe, which reduces the signaling overhead between the network side and the user terminal.

For the feature that the amount of MCCH data is relatively stable, there may be a manner of arranging PRB resources in a subframe. FIG. 4 is a schematic diagram of information for allocating resources allocated for MCCH and MTCH data according to the present invention. As shown in FIG. One or several PRBs are PRBs that are fixed to carry MCCH. Of course, one or several PRBs of the agreement are definitely not enough to fully carry MCCH data. of. In addition to carrying the MCCH data in the agreed PRB, the PRB resource information that is occupied by the MCCH data in the subframe is also required to be used, and the PRB resource information is used to describe which PRBs carry MCCH data in the subframe, or Describe which PRBs in the subframe are carrying MCCH data. In this way, the pre-defined PRB in the sub-frame becomes the PRB that carries the information of the resources allocated by the MCCH data. After the receiving end parses the PRBs in the sub-frame, it can learn which of the PRBs in the sub-frame have the bearers on the PRB. MCCH data. Thus, once the amount of MCCH data changes, the number of PRBs can be allocated as needed, thereby avoiding waste of resources. At the same time, there is a high degree of flexibility in allocating resources for MCCH data. This is equivalent to the signaling mode for allocating the PRB for the data of the MCCH, which can make the reception of the MCCH and the PDCCH have no relationship, because in the prior art, the reception of the unicast service data is mainly through the PDCCH to learn the service. Resource information for the data. If the operation is performed in the above manner, the resource allocation information of the MBMS service and the resource allocation information of the unicast service can be independently transmitted without interference, and the PDCCH load of the unicast is not affected. If the MBSFN subframe is used to carry the MBMS and the related control information in the single cell mode, the foregoing may also be implemented in the foregoing manner, and may also achieve the purpose of not affecting the unicast service.

When receiving the MCCH, the receiving end must first know which subframes carry the MCCH, and then know which specific PRBs carry the MCCH in the subframe, and after receiving the PRB carrying the MCCH, perform the received data according to the MCCH control information. Parse and finally obtain MCCH data. Since the user terminal receives and demodulates the MCCH into the prior art, details of its implementation are not described herein.

In this example, one or more of the MBMS scheduling channel (MSCH), the MBMS transport channel (MTCH, MBMS Traffic Channel), and the MBMS notification indication (MBMS Notification Indication) in the subframe carrying the MCCH or other subframes. It is also carried in units of PRB.

Embodiment 2

This example describes the case where the MCCH is carried based on OFDM symbols within a subframe. figure 2 A schematic diagram of a subframe structure when the MCCH of the present invention is carried in units of OFDM symbols. As shown in FIG. 2, an OFDM symbol is composed of all subcarriers of the system, and is a minimum indivisible granularity in the time domain direction. For the LTE system, under the standard CP and the extended CP, the resources available for one OFDM symbol are equal, that is, the number of subcarriers is the same. In the standard CP, one subframe contains 14 OFDM symbols, and when the CP is extended, one subframe contains 12 OFDM symbols. As specified in LTE, the first one or two OFDM symbols of each multicast service subframe carry control information of the unicast service. The amount of data that can be carried in an intra-subframe OFDM symbol is determined by the bandwidth of the system and the sub-carrier spacing. In the LTE system, when the bandwidth is 20M, the reserved guard interval is removed, and the available subcarriers are 1200. One OFDM symbol in a subframe is composed of 1200 subcarriers.

In this example, the MCCH is carried in units of OFDM symbols. The system determines the number of OFDM symbols according to the amount of data in the MCCH, or determines the number of OFDM symbols according to the maximum amount of data in the MCCH, and determines the number of OFDM symbols carrying the MCCH. In this case, the MCCH is carried in units of OFDM symbols, and the foregoing bearer mode is used. Forming corresponding signaling to the user terminal; mapping the data in the MCCH to the allocated OFDM symbol for transmission.

The MCCH can be carried in the unicast service control domain of the subframe, ie, the PDCCH. The MCCH is carried in the first 1 to 3 OFDM symbols of the unicast subframe, or in the first 1 to 2 OFDM symbols of the multicast subframe. That is, the control information in the MCCH and the control information of the unicast service are carried together on the PDCCH.

The MCCH may also be carried on one or a plurality of consecutive OFDM symbols immediately after the subframe unicast service control domain, i.e., immediately adjacent to the OFDM symbol after the PDCCH.

The amount of data of the MCCH is generally fixed, or the maximum amount of data is determined. This example can fix the number of OFDM symbols used to carry the MCCH, and fix some OFDM symbols to carry the MCCH. When the OFDM symbol carrying the MCCH is fixed in the subframe, the information of the OFDM symbol carrying the MCCH may be configured in the user terminal, and the network side does not need to be temporary. The OFDM symbol of the 7-carrier MCCH is determined, and it is not necessary to inform the user terminal which OFDM symbols are to carry the MCCH. The user terminal can know which subframes of the OFDM symbols carry the MCCH through the configuration information, and directly receive the MCCH on the corresponding OFDM symbols in the subframe. Thereby reducing the signaling overhead between the network side and the user terminal.

For the relatively stable MCCH data volume, there may be a way of arbitrating OFDM symbol resources in a subframe, that is, an OFDM symbol that stipulates that one or several OFDM symbols are fixed-bearing MCCHs. Certainly, one or several OFDM symbols that are agreed to are not enough to fully carry the MCCH data, and the OFDM symbol resource information that the MCCH data occupies in the subframe should be carried in addition to the MCCH data in the agreed OFDM symbol. The OFDM symbol resource information is used to describe which OFDM symbols in the subframe carry MCCH data, or to describe which OFDM symbols in the subframe are carrying MCCH data. In this way, the OFDM symbol that is previously agreed in the subframe becomes the OFDM symbol that carries the information of the resource allocated by the MCCH data. After the receiver parses the OFDM symbols in the subframe, it can learn which OFDM symbols are in the subframe. The MCCH data is carried on it. Thus, once the amount of MCCH data changes, the number of OFDM symbols can be allocated as needed, thereby avoiding waste of resources. At the same time, it has a high flexibility when allocating resources for MCCH data. This is equivalent to the signaling mode for allocating OFDM symbols for the data of the MCCH. This method can make the reception of the MCCH and the PDCCH have no relationship, because in the prior art, the reception of the unicast service data is mainly learned through the PDCCH. Resource information for business data. If the resource allocation information of the MBMS service and the resource allocation information of the unicast service are transmitted independently, the interference does not interfere with each other, and the load of the PDCCH of the unicast is not affected. If the MBSFN subframe is used to carry the MBMS and the related control information in the single cell mode, the method may also be implemented in the foregoing manner, and the unicast service may not be affected.

The receiving end receives the OFDM symbol carrying the MCCH according to the obtained OFDM symbol on the subframe carrying the MCCH, and parses the received data according to the control information of the MCCH, Finally, the MCCH data is obtained.

In this embodiment, one or more of the MSCH, MTCH, and MBMS notification indication information may be carried in units of OFDM symbols in a subframe that carries the MCCH or in other subframes. One or more of the MSCH, MTCH, and MBMS notification indication information may also be carried in units of PRB. One or more of the MSCH, MTCH, and MBMS notification indication information may also be carried in units of subcarriers or subcarrier clusters. A subcarrier is a single subcarrier occupying 12 or 14 OFDM symbols in the time domain. Since the first 1 to 3 OFDM symbols of the unicast subframe and the first 1 or 2 OFDM symbols of the multicast subframe carry control information (PDCCH) of the unicast service, the MSCH is carried in units of subcarriers. When the MTCH and MBMS are notified of the indication information, the subcarrier is not 12 or 14 OFDM symbols, and is an OFDM symbol of a single subcarrier other than the OFDM symbol carrying the PDCCH, or the MCCH. The subcarrier cluster refers to two or more consecutive subcarriers. Considering system compatibility and channel demodulation complexity, the number of consecutive subcarriers in the subcarrier cluster in the present invention is preferably an integer multiple of 12, such as 12 24 consecutive subcarriers are one subcarrier cluster and the like.

Embodiment 3

This example describes a case where the MCCH is carried based on a subcarrier or a subcarrier cluster. FIG. 3 is a schematic diagram of a subframe structure when the MCCH is carried in units of subcarriers or subcarriers, as shown in FIG. The subcarrier is a single subcarrier occupying 12 OFDM symbols. For example, in the LTE system, the interval of the subcarriers is 15 kHz, and for the resources with a bandwidth of 20 Mbps, the reserved guard bands are removed, and the available subcarriers are 1200. In general, subcarriers are used in groups of multiples of 12, which just fits the size of a PRB in the frequency direction. In the present invention, a plurality of consecutive subcarriers in a subframe are referred to as one subcarrier cluster, for example, 12 consecutive subcarriers are one subcarrier cluster, or 24 consecutive subcarriers are one subcarrier cluster. Here, it is mainly considered that the data of the MCCH is generally greater than 12 subcarriers and the bearer amount is within one subframe. Therefore, it is necessary to define a relatively reasonable bearer unit for the MCCH and subsequent MBMS services, so that there may be Reduced signaling overhead due to too small bearer units.

The MCCH is carried in units of subcarriers or subcarrier clusters. The system determines the number of subcarriers or subcarrier clusters according to the amount of data in the MCCH, or determines the number of subcarriers or subcarrier clusters according to the determined number of subcarriers or subcarrier clusters; The number of carrier clusters, and notifying the user terminal of the above configuration manner; mapping the data in the MCCH to the allocated OFDM symbols for transmission. When the subcarrier or the subcarrier cluster carrying the MCCH is fixed in the subframe, the fixed subcarrier or subcarrier cluster information carrying the MCCH can be configured in the user terminal, and the network side does not need to separately notify the user terminal of the information.

For the feature that the amount of MCCH data is relatively stable, there may be a manner of arranging subcarriers or subcarrier cluster resources in a subframe, that is, a subcarrier or subcarrier that appoints one or several subcarriers or subcarrier clusters to be a fixed bearer MCCH. Carrier cluster. Of course, one or several subcarriers or subcarrier clusters that are agreed to are definitely not enough to carry MCCH data. In addition, the MCCH data should be carried in the agreed subcarrier or subcarrier cluster, and the MCCH data needs to be carried in the subframe. The resource information of the subcarrier or the subcarrier cluster that is occupied, the resource information of the subcarrier or the subcarrier cluster is used to describe which subcarriers or subcarrier clusters in the subframe are carried with MCCH data, or describe the subframe. Which subcarriers or subcarrier clusters are loaded with MCCH data. In this way, the pre-agreed subcarrier or subcarrier cluster in the subframe becomes a subcarrier or a subcarrier cluster carrying information of resources allocated by the MCCH data, and after receiving the subcarriers or subcarrier clusters in the subframe, the receiving end parses the subcarriers or subcarrier clusters in the subframe. It can be known which subcarriers or subcarriers in the subframe are carrying MCCH data. In this way, once the amount of MCCH data changes, the number of subcarriers or subcarrier clusters can be allocated as needed, thereby avoiding waste of resources. At the same time, it has higher flexibility when allocating resources for MCCH data. This is equivalent to the signaling mode for allocating subcarriers or subcarrier clusters for the data of the MCCH. This method can make the reception of the MCCH and the PDCCH have no relationship, because in the prior art, the reception of the unicast service data is mainly The resource information of the service data is learned by the PDCCH. If you follow the above operation, you can do resource allocation information for the MBMS service. The resource allocation information of the unicast service is transmitted independently and does not interfere with each other, and does not affect the load of the PDCCH of the unicast. If the MBSFN subframe is used to carry the MBMS and the related control information in the single cell mode, the foregoing may also be implemented in the foregoing manner, and may also achieve the purpose of not affecting the unicast service.

For a multi-carrier communication system, the MCCH can be directly carried on one carrier, and other services indicated by the MCCH are carried on other carriers.

Considering the compatibility of the communication system, when the MCCH is carried in units of subcarriers or subcarriers, the subcarriers or subcarrier clusters may be composed of consecutive subcarriers in the frequency direction, or may be composed of discrete subcarriers. The unit in the time direction of the carrier or subcarrier cluster may also be consecutive one or more OFDM symbols on the subcarrier or subcarrier cluster. For example, for a multicast service subframe, the unit of the subcarrier or subcarrier cluster in the time direction may be the 3rd, 4th OFDM symbols in the time domain.

When receiving the MCCH, the receiving end must first know which subframes carry the MCCH, and secondly know which subcarriers or subcarrier clusters on the subframe carry the MCCH, and then receive the subcarriers or subcarrier clusters carrying the MCCH, and according to The MCCH control information parses the received data and finally acquires the MCCH data.

In this embodiment, one or more of the MSCH, the MTCH, and the MBMS notification indication information may be carried in units of subcarriers or subcarrier clusters, or may be MSCH, in a subframe that carries the MCCH or other subframes. One or more of the MTCH and MBMS notification indication information are carried in units of PRBs.

5 is a schematic structural diagram of Embodiment 1 of a bearer device for a logical channel of a multimedia broadcast multicast service according to the present invention. As shown in FIG. 5, the bearer device of the logical channel of the multimedia broadcast multicast service of the present example includes a first bearer unit 40 and a second The bearer unit 41 is configured to carry the MCCH in units of OFDM symbols in a subframe. The first bearer unit 40 carries the MCCH in the OFDM symbol carrying the unicast service control information in the subframe, or the MCCH is carried in one or more OFDM symbols in the subframe immediately adjacent to the unicast service control information. In continuous OFDM symbols. The second bearer unit 41 is configured to allocate one or more of the MSCH, MTCH, and MBMS notification indication information to the remaining resources of the subframe carrying the MCCH in units of at least one of an OFDM symbol, a PRB, a subcarrier, and a subcarrier cluster. Carry in. One or more of the MSCH, MTCH, and MBMS notification indication information may also be carried in other subframes in the foregoing bearer mode.

The first loading unit 40 further carries information of resources allocated for MCCH data in one or more PRBs, or subcarriers, or subcarrier clusters that are set;

Alternatively, the first bearer unit 40 further carries information of resources allocated for the MTCH data in one or more of the set PRBs, or subcarriers, or subcarrier clusters.

It should be understood by those skilled in the art that the implementation functions of the processing units in the bearer of the multimedia broadcast multicast service logical channel shown in FIG. 5 can be understood by referring to the related description in the second embodiment. The functions of the units in the bearer of the multimedia broadcast multicast service logical channel shown in FIG. 5 can be implemented by a program running on the processor, or can be realized by a specific logic circuit.

FIG. 6 is a schematic structural diagram of Embodiment 1 of a bearer device for a logical channel of a multimedia broadcast multicast service according to the present invention. As shown in FIG. 6, the bearer device of the logical channel of the multimedia broadcast multicast service of the present example includes a first bearer unit 50 and a second The bearer unit 51 is configured to carry the MCCH in units of subcarriers or subcarriers in a subframe. When the first bearer unit 50 carries the MCCH in units of subcarriers or subcarrier clusters, the carried subcarriers or subcarrier clusters are continuous or discrete in the frequency domain. The subcarriers or subcarrier clusters carried by the MCCH occupy one or more consecutive OFDM symbols in the time domain. The second bearer unit 51 is configured to carry one or more of the MSCH, MTCH, and MBMS notification indication information in the remaining resources of the subframe carrying the MCCH in units of at least one of the PRB, the subcarrier, and the subcarrier cluster. . One or more of the MSCH, MTCH, and MBMS notification indication information may also be carried in other subframes in the aforementioned bearer manner.

The first carrier unit 50 is further configured to be more than one PRB, or subcarrier, or sub In the carrier cluster, information carrying resources allocated for MCCH data;

Alternatively, the first bearer unit 50 further carries information of resources allocated for the MTCH data in one or more of the set PRBs, or subcarriers, or subcarrier clusters.

It should be understood by those skilled in the art that the implementation functions of the processing units in the bearer of the multimedia broadcast multicast service logical channel shown in FIG. 6 can be understood by referring to the related description in the third embodiment. The functions of the units in the bearer of the multimedia broadcast multicast service logical channel shown in FIG. 6 can be implemented by a program running on the processor, or can be realized by a specific logic circuit.

FIG. 7 is a schematic structural diagram of a third embodiment of a bearer device for a logical broadcast multicast service logical channel according to the present invention. As shown in FIG. 7, the bearer device of the multimedia broadcast multicast service logical channel of the present example includes a first bearer unit 60 and a second a bearer unit 61, where the first bearer unit 60 is configured to carry the MCCH in units of PRBs in a subframe, that is, the MCCH is carried in the PRB corresponding to the first six or the first seven OFDM symbols in the subframe, or the MCCH The PRBs carrying the MCCH in the subframe are consecutive or discrete in the frequency domain. The second bearer unit 61 is configured to carry the MSCH, MTCH, and MBMS notification indication information in the remaining resources of the subframe carrying the MCCH in units of PRB. One or more of the MSCH, MTCH, and MBMS notification indication information may also be carried in other subframes in the foregoing bearer mode.

The first loading unit 60 further carries information of resources allocated for the MCCH data in one or more set PRBs, or subcarriers, or subcarrier clusters that are set;

Alternatively, the first bearer unit 60 further carries information of resources allocated for the MTCH data in one or more of the set PRBs, or subcarriers, or subcarrier clusters.

It should be understood by those skilled in the art that the implementation functions of the processing units in the bearer of the multimedia broadcast multicast service logical channel shown in FIG. 7 can be understood by referring to the related description in the first embodiment. The functions of the units in the bearer of the multimedia broadcast multicast service logical channel shown in FIG. 7 can be implemented by a program running on the processor, or can be implemented by a specific logic circuit. The bearer device of the multimedia broadcast multicast service logical channel of the present invention may further include a bearer unit, configured to use one or more of the MSCH, the MTCH, and the MBMS notification indication information in the OFDM symbol, the PRB, the subcarrier, and the subcarrier cluster. At least one of the units is carried in a subframe. For a specific implementation manner of the bearer unit, refer to the related descriptions in the foregoing Embodiments 1 to 3.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

Claim

A method for carrying a logical channel of a multimedia broadcast multicast service, the method comprising:

The method according to claim 1, wherein the method further comprises: carrying information of resources allocated for the MCCH data in the set one or more PRBs, or subcarriers, or subcarrier clusters.

The method according to claim 1, wherein the method further comprises: carrying information of resources allocated for the MTCH data in the set one or more PRBs, or subcarriers, or subcarrier clusters.

The method according to claim 1, wherein, when the MCCH is carried in units of OFDM symbols, the MCCH is carried in an OFDM symbol carrying the unicast service control information in the subframe, or the MCCH is carried in the subframe. Immediately in one or more consecutive OFDM symbols of an OFDM symbol carrying unicast traffic control information.

The method according to claim 1 or 4, wherein the method further comprises: one or more of an MBMS scheduling channel MSCH, an MBMS transmission channel MTCH, and an MBMS notification indication information in an OFDM symbol, a PRB, a sub- At least one of the carrier and the subcarrier cluster is carried in units of resources remaining in the subframe carrying the MCCH.

The method according to claim 1, wherein when the MCCH is carried in units of subcarriers or subcarriers, the carried subcarriers or subcarrier clusters are continuous or discrete in the frequency domain.

7. The method according to claim 6, wherein the subcarriers or subcarriers carrying the MCCH occupy one or more consecutive OFDM symbols in the time domain.

8. The method according to claim 1, 6 or 7, wherein the method further comprises Includes:

The method according to claim 1, wherein, when the MCCH is carried in units of PRBs, the MCCH is carried in the PRB corresponding to the first six or the first seven OFDM symbols in the subframe, or the MCCH is carried in the sub-frame. In the pair of PRBs in the frame, the paired PRBs are two consecutive PRBs in the same time domain in the frequency domain of the subframe.

10. Method according to claim 9, characterized in that the PRB carrying the MCCH is continuous or discrete in the frequency domain.

The method according to claim 1, 6 or 7, wherein the method further comprises:

12. The method according to claim 1, wherein the subframe comprises a multicast subframe or a unicast subframe.

A method for carrying a logical channel of a multimedia broadcast multicast service, characterized in that the method comprises:

One or more of the MSCH, MTCH, and MBMS notification indication information are carried in the subframe in units of at least one of an OFDM symbol, a PRB, a subcarrier, and a subcarrier cluster.

The method according to claim 11, wherein the subframe comprises a multicast subframe or a unicast subframe.

A bearer for a logical channel of a multimedia broadcast multicast service, the device comprising:

a first bearer unit, configured to use an OFDM symbol in an OFDM symbol, or a PRB, in a subframe The bearer is carried in units of subcarriers or in subcarrier clusters.

The device according to claim 15, wherein the first bearer unit further carries information of resources allocated for MCCH data in one or more configured PRBs, or subcarriers, or subcarrier clusters. ;

The device according to claim 15, wherein, when the first bearer unit carries the MCCH in units of OFDM symbols, the MCCH is carried in the OFDM symbol carrying the unicast service control information in the subframe, or The MCCH is carried in one or more consecutive OFDM symbols of the OFDM symbol in the subframe immediately adjacent to the unicast service control information.

The device according to claim 15, wherein the device further comprises: a second bearer unit, configured to notify one or more of the MSCH, the MTCH, and the MBMS notification indication information by using an OFDM symbol, a PRB, a sub At least one of the carrier and the subcarrier cluster is carried in units of resources remaining in the subframe carrying the MCCH.

The apparatus according to claim 15, wherein, when the first bearer unit carries the MCCH in units of subcarriers or subcarrier clusters, the carried subcarriers or subcarrier clusters are continuous in the frequency domain or Discrete.

20. The apparatus according to claim 19, wherein the subcarriers or subcarriers carrying the MCCH occupy one or more consecutive OFDM symbols in the time domain.

The device according to claim 17, 19 or 20, wherein the device further comprises:

22. The device according to claim 15, wherein the first carrying unit will When the MCCH is carried out in units of PRBs, the MCCH is carried in the PRB corresponding to the first six or the first seven OFDM symbols in the subframe, or the MCCH is carried in the pair of PRBs in the subframe, the pair of PRBs It is two consecutive PRBs in the same time domain in the intermediate frequency domain of the subframe.

23. Apparatus according to claim 22 wherein the PRB carrying the MCCH is continuous or discrete in the frequency domain.

The device according to claim 15, 22 or 23, wherein the device further comprises:

25. A bearer for a logical channel of a multimedia broadcast multicast service, the device comprising:

The bearer unit is configured to perform one or more of the MSCH, the MTCH, and the MBMS notification indication information in a subframe by using at least one of an OFDM symbol, a PRB, a subcarrier, and a subcarrier cluster.

The apparatus according to claim 25, wherein the subframe comprises a multicast subframe or a unicast subframe.