CN101895821B - Bearing method and device of multimedia broadcast multicast service logical channels - Google Patents
Bearing method and device of multimedia broadcast multicast service logical channels Download PDFInfo
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- 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
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- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W72/30—Resource management for broadcast services
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Abstract
The invention discloses a bearing method of multimedia broadcast multicast service (MBMS) logical channels, comprising the following step: an MBMS control channel (MCCH) is borne in a subframe with an orthogonal frequency division multiplexing (OFDM) symbol or a physical resource block (PRB) or a subcarrier or a subcarrier cluster as a unit. The invention further discloses a bearing device for the MBMS logical channels, which comprises a first bearing unit for bearing the MCCH in the subframe with the OFDM symbol or the PRB or the subcarrier or the subcarrier cluster as the unit. In the invention, the logical channels such as the MCCH and the like are borne into the subframe of a radio frame based on a time domain, a frequency domain and a PRB mode, thus achieving more flexible resource allocation and maximum resource utilization rate during the process of bearing the logical channels, and enhancing the spectral efficiency of a system.
Description
Technical Field
The present invention relates to a technology for carrying a Multimedia Broadcast Multicast Service (MBMS) logical channel, and in particular, to a method and an apparatus for carrying a Multimedia Broadcast multicast service logical channel in a Long Term Evolution (LTE) system.
Background
In order to effectively utilize mobile network resources, the third generation partnership Project (3 GPP) proposes an MBMS service, which is a technology for transmitting data from one data source to a plurality of destinations, to implement sharing of network resources and improve utilization of network resources. The MBMS defined by 3GPP can not only implement plain text low-rate message multicast and broadcast, but also implement broadcast and multicast of high-speed multimedia services, and provide various rich video, audio, and multimedia services, which undoubtedly follows the development trend of future mobile data, and provides better service prospects for the development of 3G.
In the LTE system, the MBMS service may be transmitted in a mixed carrier mode, where the mixed carrier mode refers to that a Unicast service (Unicast) and a multicast service (MBMS) are transmitted on the same carrier in a time-division bearer mode, and a minimum unit of the time-division bearer is a subframe. Currently, LTE specifies that a two-stage method is used to configure radio frames and subframes for carrying MBMS services, which is specifically described as follows:
the first stage implements the radio frame configuration for carrying MBMS, satisfying the following equation SFN moderadioframeallocationperiodic. SFN is an abbreviation of SystemFrame Number system frame Number, i.e., the radio frame Number of the system, from 0 to 1023. The radioFrameAllocationPeriod indicates an MBSFN radio frame period, which may take any one of {1, 2, 4, 8, 16, 32 }. The radioFrameAllocationOffset represents an offset of the MBSFN radio frame, and a value of the offset is an integer, is smaller than a value of a selected MBSFN radio frame period, and is greater than or equal to 0. mod denotes SFN modulo or modulo the radioFrameAllocationPeriod. The above-described configuration to carry the MBMS radio frame is referred to as an MBSFN radio frame.
In the second stage, a method for carrying specific subframes in an MBMS radio frame is realized, and a bitmap is used, because the LTE specifies that subframes #0, #4, #5 and #9 cannot carry MBMS service in a Frequency Division Duplex (FDD) mode, and subframes #0, #1, #5 and #6 cannot carry MBMS service in a Time Division Duplex (TDD) mode, a bitmap with 6 bits is used to describe which of the remaining 6 subframes carry MBMS service. The subframe configuration of bearing the MBMS service in each MBSFN radio frame is the same. Since the two-level system configuration signaling is sent to the ue on the BCCH, the subframe configuration in the MBSFN radio frame in each modification period of the Broadcast Control Channel (BCCH) cannot be changed. The subframe carrying the MBMS service in the MBSFN radio frame is referred to as an MBSFN subframe, which is also referred to as a multicast subframe.
The first 1 or 2 Orthogonal Frequency Division Multiplexing (OFDM) symbols of an MBSFN subframe are used to transmit Control information of a Unicast (Unicast) service, which is also called a Physical Downlink Control Channel (PDCCH), and the remaining resources in the subframe are used to transmit an MBMS service or other services.
The configuration of the MBSFN radio frame and the MBSFN subframe can be realized by the existing two-stage system method, and the configured MBSFN subframe is a Physical resource which actually transmits the MBMS service, namely, a Physical Multicast Channel (PMCH). The PMCH carries a Multicast transport Channel (MCH) Channel. The MCH is composed of a series of MBSFN subframes configured by a two-level configuration method. It is not excluded in the LTE system that the MCH may be divided into multiple MCHs by certain rules at present. For example, a part of MBSFN subframes in the MBSFN subframes configured by the two-level scheme is MCH1, and the rest of MBSFN subframes is MCH 2.
Currently, in LTE R9, an MBMS Control Channel (MCCH) is specified to be mapped into the MCH, but no specific bearer and mapping method is given.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide a method and an apparatus for loading a MBMS logical channel, so that the MBMS logical channel is better loaded into an LTE system frame.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a bearing method of a multimedia broadcast multicast service logical channel comprises the following steps:
the MBMS control channel MCCH carries OFDM symbols by orthogonal frequency division, or carries the symbols in a subframe by a physical resource block PRB, or carries the symbols by subcarriers, or carries the symbols in a subframe by taking a subcarrier cluster as a unit.
Preferably, when the MCCH is carried in units of OFDM symbols, the MCCH is carried in an OFDM symbol in a subframe carrying unicast service control information, or the MCCH is carried in one or more consecutive OFDM symbols in the subframe that are adjacent to the OFDM symbol carrying unicast service control information.
Preferably, the method further comprises:
one or more of the MBMS scheduling channel MSCH, the MBMS transport channel MTCH, and the MBMS notification indicator are carried in the remaining resources of the MCCH-carrying subframe in units of at least one of OFDM symbols, PRBs, subcarriers, and subcarrier clusters.
Preferably, when the MCCH is carried in units of subcarriers or subcarrier clusters, the carried subcarriers or subcarrier clusters are continuous or discrete in the frequency domain.
Preferably, the MCCH-carrying subcarrier or subcarrier cluster occupies one or more than two consecutive OFDM symbols in the time domain.
Preferably, the method further comprises:
one or more of the MSCH, MTCH, and MBMS notification indicator information is carried in the resources remaining in the MCCH-carrying subframe in units of at least one of PRBs, subcarriers, and subcarrier clusters.
Preferably, when the MCCH is carried in units of PRBs, the MCCH is carried in the PRBs corresponding to the first six or seven OFDM symbols in the subframe, or the MCCH is carried in paired PRBs in the subframe, where the paired PRBs are two continuous PRBs in the same frequency domain and on the same time domain in the subframe.
Preferably, the PRBs carrying the MCCH are continuous or discrete in the frequency domain.
Preferably, the method further comprises:
one or more of the MSCH, the MTCH and the MBMS notification indication information are carried in the resource which is left in the subframe carrying the MCCH by taking PRB as a unit.
Preferably, the subframe comprises a multicast subframe or a unicast subframe.
A bearing method of a multimedia broadcast multicast service logical channel comprises the following steps:
one or more of MSCH, MTCH, and MBMS notification indicator information is/are carried in a subframe in units of at least one of OFDM symbols, PRBs, subcarriers, and subcarrier clusters. Wherein the subframe comprises a multicast subframe or a unicast subframe.
A bearer apparatus for a multimedia broadcast multicast service logical channel, comprising:
the first carrying unit is used for carrying the MCCH in a subframe by taking OFDM symbols, PRBs, subcarriers or subcarrier clusters as a unit.
Preferably, when the first carrying unit carries the MCCH in units of OFDM symbols, the MCCH is carried in an OFDM symbol in a subframe carrying unicast service control information, or the MCCH is carried in one or more than two consecutive OFDM symbols in the subframe that are adjacent to the OFDM symbol carrying unicast service control information.
Preferably, the apparatus further comprises:
and a second bearer unit, configured to carry one or more of the MSCH, the MTCH, and the MBMS notification indicator in the remaining resources of the MCCH-bearing subframe in units of at least one of an OFDM symbol, a PRB, a subcarrier, and a subcarrier cluster.
Preferably, when the first carrying unit carries the MCCH in units of subcarriers or subcarrier clusters, the carried subcarriers or subcarrier clusters are continuous or discrete in the frequency domain.
Preferably, the MCCH-carrying subcarrier or subcarrier cluster occupies one or more than two consecutive OFDM symbols in the time domain.
Preferably, the apparatus further comprises:
and a second bearer unit, configured to carry one or more of the MSCH, MTCH, and MBMS notification indicator in the remaining resources of the MCCH-bearing subframe in units of at least one of a PRB, a subcarrier, and a subcarrier cluster.
Preferably, when the first carrying unit carries the MCCH in units of PRBs, the MCCH is carried in the PRBs corresponding to the first six or seven OFDM symbols in the subframe, or the MCCH is carried in paired PRBs in the subframe, where the paired PRBs are two continuous PRBs in the same frequency domain and on the same time domain in the subframe.
Preferably, the PRBs carrying the MCCH are continuous or discrete in the frequency domain.
Preferably, the apparatus further comprises:
and a second bearer unit, configured to carry one or more of the MSCH, the MTCH, and the MBMS notification indicator in the remaining resources of the MCCH-bearing subframe in units of PRBs.
In the invention, the logical channels such as the MCCH and the like are loaded into the subframes in the wireless frame in the forms of time domain, frequency domain and PRB, so that the resource allocation is more flexible, the utilization rate of the resources can be maximized in the logical channel loading, and the spectrum efficiency of the system is improved.
Drawings
Fig. 1 is a schematic diagram of a subframe structure when the MCCH is carried in units of PRBs according to the present invention;
FIG. 2 is a schematic diagram of a subframe structure when the MCCH is carried in units of OFDM symbols according to the present invention;
FIG. 3 is a schematic diagram of a subframe structure when the MCCH is carried in units of subcarriers or subcarrier clusters according to the present invention;
FIG. 4 is a schematic structural diagram of a bearer apparatus for MBMS logical channels according to a first embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a second embodiment of a bearer apparatus for MBMS logical channels according to the present invention;
fig. 6 is a schematic structural diagram of a third embodiment of a bearer apparatus for mbms logical channels according to the present invention.
Detailed Description
The basic idea of the invention is: data of logical channels such as the MCCH and the like are loaded into subframes in a wireless frame (the subframes can be MBSFN subframes forming the MCH and also can be subframes corresponding to unicast services) in the forms of time domain, frequency domain and PRB, so that the resource allocation is more flexible, the utilization rate of resources can be maximized in the logical channel loading, and the spectral efficiency of a system is improved.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings by way of examples.
In the invention, as the MCCH is defined as a logical channel in the LTE at present, the logical channel is firstly mapped to a transmission channel according to the regulation of the LTE, and the transmission channel is then mapped to a physical channel. Therefore, in the present invention, unless otherwise specified, the MCCH means data on a physical channel corresponding to the MCCH, and the "MCCH" means "data of the MCCH". For example, MCCH is carried within a subframe in PRB manner. Data, understood as MCCH, is carried within a subframe in the form of PRB. If LTE defines a corresponding physical channel (assumed to be PMCCH) for MCCH, it may be considered that the PMCCH is carried in a subframe in a PRB manner.
Example one
This example introduces a case where the MCCH is carried based on a Physical Resource Block (PRB) within a subframe. Fig. 1 is a schematic diagram of a subframe structure of the MCCH carried in units of PRB, where, as shown in fig. 1, the PRB is formed by resources in time-frequency two-dimensional, and is 12 subcarriers in a frequency domain direction and 6 OFDM symbols in a time domain direction (for a subframe with a standard Cyclic Prefix (CP), the PRB size is 14 subcarriers, and the time direction is 7 OFDM symbols). Due to the provisions in the LTE system, the first 1 or 2 OFDM symbols of each MBSFN subframe of the extended CP carry control information of unicast traffic, also referred to as PDCCH. For a PRB containing the first 1 or 2 OFDM symbols, it is necessary to remove the resources belonging to the first 1 or 2 OFDM symbols when it is actually used. The PRB in one subframe is determined by the system bandwidth, subcarrier spacing (15 KHz subcarrier spacing for unicast traffic in LTE system). For example, in a 20M bandwidth system, except for the reserved guard interval, the number of available subcarriers is 1200, and then there are 200 PRBs in a subframe, and these PRBs are numbered according to a certain rule. Two PRBs which are continuous in time and have the same frequency in one subframe are referred to as a pair of PRBs. When the PRBs are scheduled for use, 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 the maximum data amount of the data in the MCCH; allocating PRBs for specifically bearing the MCCH according to the determined number of the PRBs, wherein the PRBs can be borne in pairs or in single unit, and the configuration forms corresponding signaling to be sent to the user terminal; and mapping the data in the MCCH to the allocated PRB for transmission. When the MCCH is carried in a single PRB, it is preferably carried in a PRB corresponding to the first 6 OFDM symbols (the subframe of the normal CP is the first 7 OFDM symbols). Whether the MCCH is carried in units of paired PRBs or in units of individual PRBs, the PRBs carrying the MCCH are preferably continuous in the frequency domain, but may be discrete.
The data amount of the MCCH is generally fixed, or the maximum data amount is determined, so the number of PRBs used to carry the MCCH may be fixed, and some PRBs may be fixed to carry the MCCH. The method has the advantages that when the PRB bearing the MCCH is fixed, the PRB can be stored in the user terminal as configuration information, the network side does not need to temporarily allocate the PRB bearing the MCCH, and does not need to inform the user terminal which PRBs bear the MCCH, the user terminal can know which PRBs in the subframe bear the MCCH and directly receive the MCCH on the appointed PRB in the subframe, and the signaling overhead between the network side and the user terminal is reduced.
When a receiving end receives the MCCH, firstly, the subframe carrying the MCCH is required to be known, secondly, the subframe carrying the MCCH on a concrete PRB is known, after the PRB carrying the MCCH is received, the received data is analyzed according to the control information of the MCCH, and finally, the MCCH data is obtained. Since the MCCH is received and demodulated by the user terminal in the prior art, details of the implementation thereof will not be described herein.
In this example, in a subframe carrying the MCCH or in another subframe, one or more of an MBMS Scheduling Channel (MSCH), an MBMS Transport Channel (MTCH), and MBMS Notification Indication information (MBMS Notification Indication) are also carried in units of PRBs.
Example two
This example introduces the case where MCCH is carried based on OFDM symbols within a subframe. Fig. 2 is a schematic diagram of a subframe structure of the MCCH carried in units of OFDM symbols of the present invention, where, as shown in fig. 2, one OFDM symbol is formed by all subcarriers of the system and has a minimum non-separable granularity in the time domain direction. For LTE systems, the resources available for one OFDM symbol are equal under standard CP and extended CP, i.e. the number of subcarriers is the same. In the case of the normal CP, one subframe includes 14 OFDM symbols, and in the case of the extended CP, one subframe includes 12 OFDM symbols. As specified in LTE, the first 1 or 2 OFDM symbols of each multicast traffic subframe carry control information for unicast traffic. The data volume that can be carried by an OFDM symbol in a subframe is determined by the bandwidth of the system and the subcarrier spacing, in an LTE system, when the bandwidth is 20M, the available subcarriers are 1200 except the reserved guard interval, and then one OFDM symbol in the subframe consists 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 the maximum data amount of the data amount in the MCCH, determines the number of the OFDM symbols bearing the MCCH, at the moment, the MCCH is borne by taking the OFDM symbols as a unit, and corresponding signaling formed by the bearing mode is notified to a user terminal; and mapping the data in the MCCH to the allocated OFDM symbols for transmission.
The MCCH may be carried in the unicast traffic control domain, i.e. PDCCH, of a subframe. The MCCH is carried within the first 1 to 3 OFDM symbols of a unicast subframe or within the first 1 to 2 OFDM symbols of a multicast subframe. That is, the control information in the MCCH and the control information of the unicast service are carried on the PDCCH together.
The MCCH may also be carried on one or a plurality of consecutive OFDM symbols immediately after the unicast service control domain of the subframe, i.e. on the OFDM symbols immediately after the PDCCH.
The data amount of the MCCH is generally fixed, or the maximum data amount is determined, and the present example may fix the number of OFDM symbols used to carry the MCCH and fix some OFDM symbols used 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 temporarily determine the OFDM symbol carrying the MCCH, and does not need to notify the user terminal which OFDM symbols carry the MCCH. The user terminal can know which OFDM symbols on the subframe bear the MCCH through the configuration information, and can 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.
And the receiving end receives the OFDM symbol bearing the MCCH according to the acquired OFDM symbol on the subframe bearing the MCCH, analyzes the received data according to the control information of the MCCH and finally acquires the MCCH data.
In this embodiment, in a subframe carrying the MCCH or other subframes, one or more of the MSCH, MTCH, and MBMS notification indicator information may be carried in units of OFDM symbols. One or more of MSCH, MTCH, and MBMS notification indicator information may be carried in PRB units. One or more of MSCH, MTCH, and MBMS notification indicator information may also be carried in units of subcarriers or subcarrier clusters. A subcarrier, i.e. a single subcarrier, occupies 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 traffic, when MSCH, MTCH, and MBMS notification indication information is carried in units of subcarriers, the subcarriers are not 12 or 14 OFDM symbols, but are OFDM symbols other than the OFDM symbols carrying PDCCH, or MCCH in a single subcarrier. The subcarrier cluster refers to more than two continuous subcarriers, and in consideration of system compatibility and channel demodulation complexity, the number of continuous subcarriers in the subcarrier cluster in the present invention is preferably an integer multiple of 12, for example, 12 and 24 continuous subcarriers are a subcarrier cluster.
EXAMPLE III
This example introduces the situation when the MCCH is carried based on a subcarrier or a cluster of subcarriers, fig. 3 is a schematic diagram of a subframe structure when the MCCH of the present invention is carried in units of subcarriers or a cluster of subcarriers, as shown in fig. 3, a subcarrier in one subframe is a single subcarrier occupying 12 OFDM symbols. For example, in the LTE system, the interval of the subcarriers is defined to be 15KHz, and for a resource with a bandwidth of 20M, 1200 subcarriers are available except for the reserved guard band. Typically, the sub-carriers are used in groups of multiples of 12, which exactly corresponds to the size of one PRB in the frequency direction. In the present invention, a plurality of consecutive subcarriers in a subframe are referred to as a subcarrier cluster, for example, 12 consecutive subcarriers are a subcarrier cluster, or 24 consecutive subcarriers are a subcarrier cluster.
And carrying the MCCH by taking a subcarrier or a subcarrier cluster as a unit. The system determines the number of subcarriers or subcarrier clusters according to the data volume in the MCCH or the maximum data volume of the data volume in the MCCH; determining the number of the subcarriers or subcarrier clusters which specifically bear the MCCH according to the determined number of the subcarriers or subcarrier clusters, and informing the user terminal of the configuration mode; and mapping the data in the MCCH to the allocated OFDM symbols for transmission. When the sub-carrier or sub-carrier cluster carrying the MCCH is fixed in the sub-frame, the information of the fixed sub-carrier or sub-carrier cluster carrying the MCCH can be configured in the user terminal, and the network side does not need to independently inform the user terminal of the information.
For a multi-carrier communication system, the MCCH may be directly carried on one carrier, and other services indicated by the MCCH may be carried on other carriers.
In consideration of compatibility of the communication system, when the MCCH is carried in units of subcarriers or subcarrier clusters, the subcarriers or subcarrier clusters may be composed of continuous subcarriers in the frequency direction or discrete subcarriers, and the unit of the subcarriers or subcarrier clusters in the time direction may also be one or more OFDM symbols that are continuous on the subcarriers or subcarrier clusters. For example, for a multicast traffic subframe, the unit of a subcarrier or a subcarrier cluster in the time direction may be the 3rd and 4 th OFDM symbols in the time domain.
When a receiving end receives the MCCH, firstly, a subframe on which the MCCH is borne must be known, secondly, a specific subcarrier or subcarrier cluster on which the MCCH is borne on the subframe is known, then, the subcarrier or subcarrier cluster bearing the MCCH is received, received data is analyzed according to control information of the MCCH, and finally, MCCH data is obtained.
In this embodiment, in the subframe or other subframes for carrying the MCCH, one or more of the MSCH, MTCH, and MBMS notification indicator may be carried in units of subcarriers or subcarrier clusters, or may be carried in units of PRBs.
Fig. 4 is a schematic structural diagram illustrating a first configuration of a bearer apparatus for mbms logical channels according to the present invention, and as shown in fig. 4, the bearer apparatus for mbms logical channels of this example includes a first bearer unit 40 and a second bearer unit 41, where the first bearer unit 40 is configured to carry an MCCH in a subframe by using an OFDM symbol as a unit. The first carrying unit 40 carries the MCCH in an OFDM symbol in a subframe carrying unicast service control information, or the MCCH is carried in one or more consecutive OFDM symbols in the subframe that are adjacent to the OFDM symbol carrying unicast service control information. The second bearer unit 41 is configured to bear one or more of MSCH, MTCH, and MBMS notification indicator in the remaining resources of the MCCH-bearing subframe in units of at least one of OFDM symbols, PRBs, subcarriers, and subcarrier clusters. One or more of the MSCH, MTCH, and MBMS notification indicator information may also be carried in other subframes in the bearer manner described above.
Those skilled in the art will understand that the functions implemented by each processing unit in the bearer of the mbms logical channel shown in fig. 4 can be understood by referring to the related description in the second embodiment. The functions of the units in the bearer of the mbms logical channel shown in fig. 4 may be implemented by a program running on a processor, or may be implemented by specific logic circuits.
Fig. 5 is a schematic structural diagram illustrating a first configuration of a bearer apparatus for mbms logical channels according to the present invention, and as shown in fig. 5, the bearer apparatus for mbms logical channels of this example includes a first bearer unit 50 and a second bearer unit 51, where the first bearer unit 50 is configured to carry an MCCH in a sub-frame by using a subcarrier or a subcarrier cluster as a unit. When the first carrying 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 sub-carriers or sub-carrier clusters carried by the MCCH occupy one or more than two continuous OFDM symbols in the time domain. The second bearer unit 51 is configured to carry one or more of MSCH, MTCH, and MBMS notification indicator in the remaining resources of the MCCH-carrying subframe in units of at least one of PRBs, subcarriers, and subcarrier clusters. One or more of the MSCH, MTCH, and MBMS notification indicator information may also be carried in other subframes in the bearer manner described above.
Those skilled in the art will understand that the functions implemented by each processing unit in the bearer of the mbms logical channel shown in fig. 5 can be understood by referring to the related description in the third embodiment. The functions of the units in the bearer of the mbms logical channel shown in fig. 5 may be implemented by a program running on a processor, or may be implemented by specific logic circuits.
Fig. 6 is a schematic structural diagram of a third embodiment of a bearer for a mbms logical channel according to the present invention, and as shown in fig. 6, the bearer for the mbms logical channel of this example includes a first bearer unit 60 and a second bearer unit 61, where the first bearer unit 60 is configured to bear an MCCH in a subframe by using a PRB as a unit, that is, the MCCH is borne in a PRB corresponding to the first six or seven OFDM symbols in the subframe, or the MCCH is borne in a paired PRB in the subframe, and the paired PRB is two consecutive PRBs in the subframe in the same time domain in the frequency domain. The PRBs carrying the MCCH are continuous or discrete in the frequency domain. The second bearer unit 61 is configured to carry the MSCH, MTCH, and MBMS notification indicator in remaining resources of the MCCH-bearing subframe in units of PRBs. One or more of the MSCH, MTCH, and MBMS notification indicator information may also be carried in other subframes in the bearer manner described above.
Those skilled in the art will understand that the functions implemented by each processing unit in the bearer apparatus of the mbms logical channel shown in fig. 6 can be understood by referring to the related description in the first embodiment. The functions of the units in the bearer of the mbms logical channel shown in fig. 6 may be implemented by a program running on a processor, or may be implemented by specific logic circuits.
The apparatus for carrying MBMS logical channels may further include only a carrying unit, configured to carry one or more of MSCH, MTCH, and MBMS notification indicator in a subframe in units of at least one of OFDM symbols, PRBs, subcarriers, and subcarrier clusters. The specific implementation manner of the carrying unit is described in the first to third embodiments.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (11)
1. A method for carrying a multimedia broadcast multicast service logical channel includes:
the MBMS control channel MCCH carries OFDM symbols by orthogonal frequency division or carries in subframes by taking a physical resource block PRB as a unit;
wherein, the number and the position of the OFDM symbols or PRBs carrying the MCCH are allowed to be fixed; the fixed OFDM symbols, or PRB information, are stored in a user terminal;
when the MCCH is carried by taking an OFDM symbol as a unit, the MCCH is carried in the OFDM symbol which carries unicast service control information in a subframe, or the MCCH is carried in one or more than two continuous OFDM symbols which are adjacent to the OFDM symbol which carries the unicast service control information in the subframe;
when the MCCH is carried in units of PRBs, the MCCH is carried in the PRBs corresponding to the first six or seven OFDM symbols in the subframe, or the MCCH is carried in paired PRBs in the subframe, where the paired PRBs are two continuous PRBs in the same frequency domain and on the same time domain in the subframe.
2. The method of claim 1, further comprising:
one or more of the MBMS scheduling channel MSCH, the MBMS transport channel MTCH, and the MBMS notification indicator are carried in the remaining resources of the MCCH-carrying subframe in units of at least one of OFDM symbols, PRBs, subcarriers, and subcarrier clusters.
3. The method of claim 1, wherein the PRBs carrying the MCCH are continuous or discrete in frequency domain.
4. The method of claim 1, wherein the subframe comprises a multicast subframe or a unicast subframe.
5. A method for carrying a multimedia broadcast multicast service logical channel includes:
one or more of MSCH, MTCH and MBMS notification indication information are carried in a subframe by taking at least one of OFDM symbols, PRBs, subcarriers and subcarrier clusters as a unit;
wherein the number and positions of the OFDM symbols, or PRBs, or subcarriers, or subcarrier clusters carrying MSCH, MTCH and MBMS notification indication information are allowed to be fixed; the fixed OFDM symbol, or PRB, or subcarrier cluster information is stored in the user terminal.
6. The method of claim 5, wherein the subframe comprises a multicast subframe or a unicast subframe.
7. A bearer apparatus for a multimedia broadcast multicast service logical channel, comprising:
the first bearing unit is used for bearing the MCCH in a subframe by taking OFDM symbols or PRB as a unit; wherein,
the number and position of the OFDM symbols or PRBs carrying MCCH are allowed to be fixed; the fixed OFDM symbols, or PRB information, are stored in a user terminal;
when the first bearing unit bears the MCCH by taking the OFDM symbol as a unit, the MCCH is borne in the OFDM symbol which bears the unicast service control information in the subframe, or the MCCH is borne in one or more than two continuous OFDM symbols which are adjacent to the OFDM symbol which bears the unicast service control information in the subframe;
when the first bearing unit bears the MCCH by taking the PRB as a unit, the MCCH is borne in the PRB corresponding to the first six or seven OFDM symbols in the subframe, or the MCCH is borne in paired PRBs in the subframe, wherein the paired PRBs are two continuous PRBs in the subframe in the same frequency domain and on the same time domain.
8. The apparatus of claim 7, further comprising:
and a second bearer unit, configured to carry one or more of the MSCH, the MTCH, and the MBMS notification indicator in the remaining resources of the MCCH-bearing subframe in units of at least one of an OFDM symbol, a PRB, a subcarrier, and a subcarrier cluster.
9. The apparatus of claim 7, wherein the PRBs carrying the MCCH are continuous or discrete in frequency domain.
10. A bearer apparatus for a multimedia broadcast multicast service logical channel, comprising:
a carrying unit, configured to carry one or more of MSCH, MTCH, and MBMS notification indicator in a subframe in units of at least one of an OFDM symbol, a PRB, a subcarrier, and a subcarrier cluster;
wherein the number and positions of the OFDM symbols, or PRBs, or subcarriers, or subcarrier clusters carrying MSCH, MTCH and MBMS notification indication information are allowed to be fixed; the fixed OFDM symbol, or PRB, or subcarrier cluster information is stored in the user terminal.
11. The apparatus of claim 10, wherein the subframe comprises a multicast subframe or a unicast subframe.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910085505.1A CN101895821B (en) | 2009-05-22 | 2009-05-22 | Bearing method and device of multimedia broadcast multicast service logical channels |
| PCT/CN2010/072169 WO2010133122A1 (en) | 2009-05-22 | 2010-04-23 | Bearing method and device for logical channel of multimedia broadcast multicast service |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN200910085505.1A CN101895821B (en) | 2009-05-22 | 2009-05-22 | Bearing method and device of multimedia broadcast multicast service logical channels |
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| Publication Number | Publication Date |
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| CN101895821A CN101895821A (en) | 2010-11-24 |
| CN101895821B true CN101895821B (en) | 2015-01-28 |
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| CN200910085505.1A Expired - Fee Related CN101895821B (en) | 2009-05-22 | 2009-05-22 | Bearing method and device of multimedia broadcast multicast service logical channels |
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| WO (1) | WO2010133122A1 (en) |
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| CN102916918B (en) * | 2011-08-01 | 2016-03-30 | 华为技术有限公司 | Notify the method for MCCH message alteration, base station and terminal |
| CA2837682C (en) * | 2011-08-12 | 2019-02-12 | Panasonic Corporation | Transmission device, reception device, transmission method, and reception method |
| JP5832914B2 (en) * | 2012-01-27 | 2015-12-16 | シャープ株式会社 | COMMUNICATION SYSTEM, MOBILE STATION DEVICE, BASE STATION DEVICE, COMMUNICATION METHOD, AND INTEGRATED CIRCUIT |
| CN104144510B (en) * | 2013-05-10 | 2018-08-24 | 上海诺基亚贝尔股份有限公司 | Method and apparatus for downlink transmission |
| MX2019004877A (en) * | 2016-11-04 | 2019-06-20 | Guangdong Oppo Mobile Telecommunications Corp Ltd | Method for transmitting data, terminal device and network device. |
| CN108023702A (en) * | 2016-11-04 | 2018-05-11 | 维沃移动通信有限公司 | Data transmission method and device in a kind of cordless communication network |
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| EP2119058A4 (en) * | 2007-01-10 | 2012-12-12 | Nec Corp | Transmission of mbms in an ofdm communication system |
| US8249007B2 (en) * | 2007-03-28 | 2012-08-21 | Telefonaktiebolaget L M Ericsson (Publ) | Measurement of cell-specific reference symbols in the presence of MBMS single frequency network transmissions |
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