WO2010124416A1 - 实现mbsfn方式传输mbms控制信令的方法和装置 - Google Patents
实现mbsfn方式传输mbms控制信令的方法和装置 Download PDFInfo
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- WO2010124416A1 WO2010124416A1 PCT/CN2009/000460 CN2009000460W WO2010124416A1 WO 2010124416 A1 WO2010124416 A1 WO 2010124416A1 CN 2009000460 W CN2009000460 W CN 2009000460W WO 2010124416 A1 WO2010124416 A1 WO 2010124416A1
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- multicast
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- 230000011664 signaling Effects 0.000 title claims abstract description 160
- 230000005540 biological transmission Effects 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000012545 processing Methods 0.000 claims description 14
- 238000004891 communication Methods 0.000 claims description 11
- 125000004122 cyclic group Chemical group 0.000 claims description 4
- 238000012795 verification Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 24
- 230000000875 corresponding effect Effects 0.000 description 18
- 238000013468 resource allocation Methods 0.000 description 18
- 230000001788 irregular Effects 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 5
- 238000013507 mapping Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000000873 masking effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
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Classifications
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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 signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/30—Resource management for broadcast services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
- H04L12/189—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast in combination with wireless systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
Definitions
- the present invention relates to communication networks, and more particularly to a method and apparatus for signaling transmission in a wireless communication network. Background technique
- Multimedia Broadcast Multicast Service is an important feature introduced by the 3GPP (3GPP, 3rd Generation Partnership Project) organization in Release 6 (R6, Release 6).
- a point-to-multipoint service that simultaneously transmits data from a data source to multiple users in a specific range, thereby sharing resources of the network, including the core network and the access network, with a small number of resources having the same requirements Users also provide services, such as: multimedia services.
- MBMS has achieved a complete implementation in the R6 and R7 versions of the 3G system, it still cannot meet the growing business needs, especially the strong demand for mobile TV services by users and operators.
- LTE Long Term Evolution
- MBMS has made significant improvements in logical architecture, service mode, transmission mode and channel structure. Therefore, it has experienced the evolution of the MBMS to System Architecture Evolve-Multimedia Broadcast Multicast Service (RSE-MBMS) and the Evolution of MBMS (Long Term Evolution-MBMS) in the R6/R7 version.
- RSE-MBMS System Architecture Evolve-Multimedia Broadcast Multicast Service
- MBMS Long Term Evolution-MBMS
- a single frequency network (SFN) transmission mode that is, a broadcast and/or multicast single frequency network (MBSFN, Muticast) is introduced in the access network.
- Broadcast Single Frequency Network that is, multiple base stations transmit data of the same content using the same radio configuration (eg, modulation and coding scheme) at the same time and using the same resources.
- These multiple cells that implement MBSFN transmission are called Broadcast and/or multicast single frequency network area (MBSFN Area).
- MBSFN Area Broadcast and/or multicast single frequency network area
- Using MBSFN transmission mode can save frequency resources and improve spectrum utilization.
- the diversity effect brought by the multi-cell co-frequency transmission can solve the problem of blind zone coverage, enhance the reliability of reception, and improve coverage.
- multimedia multicast and/or broadcast control signaling that is, control signaling transmitted on the MBMS Point-to-Multicast Control Channel (MCCH)
- MCCH Point-to-Multicast Control Channel
- the signaling transmission mechanism sends the signaling according to the service ID on the reserved signaling channel, and thus does not support MBSFN transmission.
- the present invention proposes several implementations for transmitting multimedia multicast and/or broadcast control signals in the MBSFN manner, and more particularly to the implementation of Layer 2 (L2) for transmitting MCCH signaling in MBSFN mode.
- L2 Layer 2
- a method for controlling transmission of multimedia broadcast and/or multicast service control signaling in a base station of a wireless communication network comprising: broadcasting and/or multicasting a single Transmitting the multimedia broadcast and/or multicast service control signaling in a manner of a frequency network;
- a method for receiving multimedia broadcast and/or multicast service control signaling in a mobile station wherein the mobile station receives a system message from a base station, in the system message Include information about an adjustment period and/or the repetition period, the method comprising: receiving the multimedia in a corresponding broadcast and/or multicast single frequency network subframe according to the adjustment period and/or the repetition period Broadcast and/or multicast service control signaling;
- a control apparatus for controlling transmission of multimedia broadcast and/or multicast service control signaling in a base station of a wireless communication network, comprising: transmitting means for broadcasting And transmitting the multimedia broadcast and/or multicast service control signaling in a manner of a multicast single frequency network;
- a mobile station in a wireless communication network configured to receive a multimedia broadcast and/or a multicast service control signaling, where the mobile station receives a system message from a base station, where the system message includes information about an adjustment period and/or the repetition period,
- the method includes: receiving, configured to receive, according to the adjustment period and/or the repetition period, the multimedia broadcast and/or multicast service control signaling in a corresponding broadcast and/or multicast single frequency network subframe .
- the MBSFN mode transmission MBMS control signaling is implemented.
- the multimedia broadcast and/or multicast service control signaling and the multimedia broadcast and/or multicast service data are multiplexed in the same MBSFN subframe, and the multimedia broadcast and/or multicast can be dynamically performed.
- Service Control Signaling allocates resources in MBSFN subframes.
- FIG. 1 is a schematic diagram of an MBSFN subframe structure for transmitting a MCCH control signal according to a first embodiment of the present invention
- Figure 2 is a flow chart of a method in accordance with a first embodiment of the present invention
- FIG. 3 is a schematic diagram of an MBSFN subframe structure for transmitting a MCCH control signal according to a second embodiment of the present invention
- Figure 4 is a flow chart of a method in accordance with a second embodiment of the present invention.
- Figure 5 is a diagram showing the structure of an MBSFN subframe for transmitting a MCCH control signal according to a third embodiment of the present invention.
- Figure 6 is a flow chart of a method in accordance with a third embodiment of the present invention.
- FIG. 7 is a schematic diagram of an MBSFN subframe structure for transmitting a MCCH control signal according to a fourth embodiment of the present invention.
- Figure 8 is a flow chart of a method in accordance with a fourth embodiment of the present invention.
- Figure 9 is a block diagram showing the structure of a MAC-PDU according to a fourth embodiment of the present invention.
- Figure 10 is a block diagram of a device in accordance with an embodiment of the present invention.
- Figure 11 is a block diagram of a device in accordance with another embodiment of the present invention.
- Figure 12 is a block diagram of a device in accordance with another embodiment of the present invention.
- Figure 13 is a block diagram of a device in accordance with another embodiment of the present invention.
- Multimedia multicast and/or broadcast service data for example, traffic data transmitted on an MBMS point-to-multipoint traffic channel (MTCH, Multicast Traffic Channl), transmitted in the form of MBSFN, and the MTCH is mapped On the multicast transmission channel (Multicast Channel, MCH), the MCH is mapped on the Physical Multicast Channel (PMCH).
- MCH multicast point-to-multipoint traffic channel
- PMCH Physical Multicast Channel
- the MTCH service data is transmitted in the form of MBSFN, which means that for the PMCH, the reference signal (RS, Reference Signal) and the scrambling code are the same in the MBSFN area, and signals transmitted from different base stations in the form of MBSFN are naturally superimposed in the air because of the reference.
- the signal and the scrambling code are the same in the entire MBSFN area, and the user equipment (UE, User Equipment) uses the unified reference signal to perform joint MBSFN channel estimation, that is, the UE does not need to distinguish which base station the signal after the combination is from.
- the signal after the joint is directly demodulated and decoded.
- both the MCCH and the MTCH are mapped to the multicast transport channel (Multicast Channel, MCH), it means that the MCCH and the MTCH can only be carried in the MBSFN subframe (MBSFN subframe).
- MBSFN subframe MBSFN subframe
- both the MCCH transmission and the MTCH transmission are used in one MBSFN subframe, when the MTCH adopts the MBSFN transmission mode, it means that the MCCH also needs to adopt the MBSFN transmission mode. Otherwise, if the MCCH adopts the non-MBSFN transmission mode, it will affect the transmission of the service data of the MTCH transmitted by the MBSFN in the same MBSFN subframe. For example, it cannot belong to the same MBSFN as the MCCH control signaling in different eNBs.
- the service data of the MTCH in the subframe is allocated the same resource.
- the UE detects the received signal by means of joint MBSFN, and therefore, if different eNBs are not used on the MCH In the MBSFN mode, the UE cannot correctly demodulate and decode the received data.
- control signaling for transmitting MCCH in MBSFN mode will be described in various embodiments.
- FIG. 1 shows a schematic diagram of a transmission mode of MCCH control signaling according to an embodiment of the present invention.
- An MBSFN subframe is l ms, that is, a Transmission Time Interval (TTI).
- TTI Transmission Time Interval
- a substring contains 12 symbols (symbols), for example, 12 OFDM symbols.
- the first two symbols in one MBSFN subframe cannot be used for MBSFN transmission, but need to be reserved for transmitting Physical HARQ Indication Channel (PHICH), Common Reference Signal (CRS) And so on, in order to unicast (unicast) users to perform inter-cell handover, load balancing or interference coordination measurement, therefore, the first two symbols of the MBSFN subframe can be regarded as the Physical Downlink Control Channel (PDCCH). symbol.
- PHICH Physical HARQ Indication Channel
- CRS Common Reference Signal
- the base station 1 in step S10, the base station 1 generates a first transport block (TB), that is, an MCCH control signaling transport block, according to the MCCH control signaling, and generates a second transport block according to the MTCH service data. That is, the MTCH service data transfer block. Therefore, as shown in FIG. 1, MCCH control signaling and MTCH service data are multiplexed in the same subframe in the form of two transport blocks.
- the two rectangles of the first transport block and the second transport block shown in FIG. 1 are only examples, and the first transport block may be mapped on one or more resource blocks (RBs). And the resource blocks may be discrete, and the second transport block may be mapped on one or more resource blocks (RBs), and the resource blocks may be discrete. So actually, The mapped pattern of resource blocks in the MB S FN subframe may be irregular.
- the base station 1 generates MCCH related indication information in the subframe.
- the MCCH related indication information includes, for example, a Downlink Control Indication (DCI) and an MBMS-Radio Network Temporary Indentifier (MBMS-RNTL).
- DCI Downlink Control Indication
- MBMS-RNTL MBMS-Radio Network Temporary Indentifier
- the DCI and MBMS-RNTI information may be located in the PDCCH symbol.
- the DCI format ( format ) 4 is defined, and the DCI format 4 includes the following information:
- MCS Modulation and Coding Schema
- a new service port indicator may also be included in DCI format 4.
- the newly defined DCI format 4 takes into account the necessary indications for dynamically scheduling MCCH control signals, thus omitting some other parameters defined in other DCI formats. Of course, you can also reuse the format 1, 2, etc. of the DCI that has been defined.
- the base station 1 can accurately determine the resource blocks occupied by the MCCH according to the actual data volume of the MCCH, so as to implement dynamic scheduling of the MCCH transport block; and the base station 1 can dynamically determine the QoS and other information required by the MCCH. Modulation coding mode of MCCH.
- the MBMS-RNTI is also included in the MCCH related indication message.
- a Cyclic Redundancy Check (CRC) can be performed on the DCI.
- CRC Cyclic Redundancy Check
- the base station 1 adds a RNSI to the CRC for masking.
- the RNTI includes a paging RNTI (paging-RNTI), an MBMS-RNTI, a monthly RNTI (S-RNTI), a user-specific RNTI (User specific RNTI), etc., and each RNTI is determined. The value is specified in the relevant agreement and will not be repeated here.
- the base station 1 knows what kind of data it needs to schedule, so it adds the corresponding RNTI to the CRC check according to the actual data to be scheduled.
- step S12 the base station 1 transmits the two transport blocks to the physical layer through the transport channel MCH and transmits them to one or more mobile stations under the jurisdiction of the base station 1.
- the base station 1 needs to adopt a period of the Modification Period (MP) and the Repetition Period (RP) for the MCCH control signaling. Transmission mechanism.
- MP Modification Period
- RP Repetition Period
- One MP is equal to one scheduling period, and one MP period is equal to multiple RP periods. For example, an MP cycle contains 4 or 8 RPs.
- the base station 1 transmits an MCCH message at the first MBSFN subframe of each MP or RP, and in other MBSFN subframes, MCCH signaling is not sent.
- the distribution of the MBSFN subframe in a scheduling period is discrete, for example, the subframe corresponding to the first period of the MP start cannot perform MBSFN transmission, and the specified MCCH control signaling must be transmitted in the form of MBSFN, so It is possible that the RP starts from the 40th subframe, and the MCCH may be transmitted in the 39th or 41st closed occasion, wherein the 39th subframe and the 41st subframe It is an MBSFN subframe. That is, the MCCH control signaling is transmitted to the mobile station only in the closest MBSFN subframe in which the adjustment period and the repetition period (RP) start.
- the closest MBSFN subframe is the last MBSFN subframe closest to the beginning of the MP/RP period or the last MBSFN subframe closest to the beginning of the MP/RP period for transmitting the MCCH control
- the signaling message is agreed by the system, and the selection mode of each base station should be consistent.
- the MCCH message sent by the base station 1 on each RP is the same. Until the MCCH message is updated, the MCCH message is updated in the closest MBSFN subframe frame started by the MP, and then the subsequent RP follows the updated MCCH message. The cycle is sent repeatedly.
- the base station 1 can augment the system message to increase the options for setting the MP and RP, and pre-send the system message containing the MP and RP to the mobile station 2. Then, in step S13, the mobile station 2 first receives the MBSFN subframe containing the MCCH control signaling from the base station 1 on the period scheduled by the MP and the RP.
- step S14 the mobile station 2 first reads the PDDCH symbol of the MBSFN subframe, and if the mobile station finds the DCI indication information, the mobile station 2 first performs a CRC operation on the DCI information. After the CRC operation is deactivated, the mobile station 2 can obtain the corresponding RNTI value to further determine whether the MCCH control signaling message needs to be decoded. If the MCCH control signaling message needs to be decoded and demodulated, the mobile station 2 decodes and demodulates the MCCH message according to the modulation and coding mode of the MCCH included in the PDCCH symbol. Subsequent operations of the mobile station 2 are not relevant to the present invention and therefore will not be described herein.
- step S10 there is no obvious sequence between step S10 and step S1 1.
- the order given above is only one implementation.
- the base station 1 can also be configured as MCCH related indication information, and then generate two transport blocks multiplexed on one MBSFN subframe according to the MCCH control signaling and the MTCH service data, respectively.
- the advantages of this first embodiment are: - Provides more efficient and flexible transmission for MCCH and MTCH; - Inherits unicast (unicast) traffic scheduling indications in the PDCCH, thus maintaining a consistent design with unicast.
- FIG. 3 is a schematic diagram of an MBSFN subframe structure for transmitting MCCH control signals according to a second embodiment of the present invention
- FIG. 4 is a flowchart of a method according to a second embodiment of the present invention.
- step S10 the base station 1 generates a first transport block according to the MCCH control signaling, and generates a second transport block according to the MTCH service data. Therefore, as shown in FIG. 3, the MCCH control signaling and The MTCH service data is multiplexed in the same subframe in the form of two transport blocks.
- the resource allocated for MCCH control signaling is fixed and reserved at a predetermined position and size, for example, may be fixedly for MCCH control signaling. The first symbol reserved after the two PDCCH symbols is transmitted. Then, the remaining 9 resource blocks in the MBSFN subframe can be used for transmission of MTCH service data.
- the two rectangles of the first transport block and the second transport block shown in FIG. 3 are only examples, and the first transport block may be mapped on one or more resource blocks, and the resource blocks may be Is discrete, the second transport block can be mapped on one or more resource blocks, and these resource blocks can be discrete. Therefore, in practice, the mapping pattern of resource blocks in MBSFN subframes may be irregular.
- step S12 the base station 1 transmits the two transport blocks to the physical layer through the transport channel MCH and transmits them to one or more mobile stations under the jurisdiction of the base station 1.
- MCCH control signaling only starts at the adjustment period and the repetition period.
- the closest MBSFN subframe is sent to the mobile station.
- step S13' the mobile station 2 first receives the MBSFN subframe containing the MCCH control signaling from the base station 1 on the period scheduled by the MP and the RP.
- step S14 the mobile station 2 decodes and demodulates the MCCH message accordingly, based on, for example, the MCS of the MCCH message acquired from the system message. Subsequent operations of the mobile station 2 are not relevant to the present invention and therefore will not be described herein.
- the method may further include a step S ir before the step S 12 , and adding a modulation and coding mode for indicating the MCCH transport block to the 2 PDCCH symbols in the step S ir Instructions.
- the second embodiment does not consider different MCCH data sizes in actual situations because the resources are allocated in the fixed reservation manner. Therefore, the resource utilization ratio of the first embodiment is different from that of the second embodiment. Resource utilization is low.
- FIG. 5 is a schematic diagram of an MBSFN subframe structure for transmitting MCCH control signals according to a third embodiment of the present invention
- FIG. 6 is a flowchart of a method according to a third embodiment of the present invention.
- step S10 the base station 1 exclusively encapsulates the MCCH control signaling into one MBSFN subframe. Therefore, as shown in FIG. 5, the transport block of the MCCH control signaling occupies one MBSFN subframe.
- the MCCH control signaling and the MTCH service data are not multiplexed, meaning that MCCH control signaling and MTCH service data cannot be transmitted in one MBSFN subframe at the same time.
- MCCH control signaling monopolizes the entire MBSFN subframe, generally, Resource allocation The allocation is started from the first resource after the start of the PDCCH symbol, and the MCCH control signaling is transmitted to the mobile station only in the closest MBSFN subframe in which the adjustment period and the repetition period start, and therefore, in the third embodiment, There is no need for indication information indicating the resource allocation of the MCCH.
- step S12 the base station 1 transmits the one transport block to the physical layer through the transport channel MCH and transmits it to one or more mobile stations under the jurisdiction of the base station 1.
- the MCCH control signaling is transmitted to the mobile station only in the closest MBSFN subframe in which the adjustment period and the repetition period start.
- step S13 the mobile station 2 first receives the MBSFN subframe containing the MCCH control signaling from the base station 1 on the period scheduled by the MP and the RP.
- step S14 the mobile station 2 decodes and demodulates the MCCH message according to, for example, the MCS of the MCCH message acquired from the system message.
- the subsequent operation of the mobile station 2 is because of the present invention The correlation is not large, so I won't go into details here.
- the rectangle of the transport block shown in FIG. 5 is only an example, and the transport block can be mapped on one or more resource blocks, and the resource blocks can be discrete, so, in fact, resources
- the mapping of blocks on resource blocks of MBSFN subframes may be irregular.
- the method may further comprise a step S11" before the step S12".
- the base station 1 adds a reference to the MCCH transport block in the 2 PDCCH symbols.
- the data volume of the MCCH control signaling is relatively small.
- the transmission of the MCCH control signaling exclusively occupies the entire subframe, and the MTCH service data is not multiplexed in the subframe. Therefore, the resource utilization of the third embodiment. The rate is lower. > Fourth embodiment
- Figure 7 is a diagram showing the structure of an MBSFN subframe for transmitting a MCCH control signal according to a fourth embodiment of the present invention
- Figure 8 is a flowchart of a method according to a fourth embodiment of the present invention.
- MCCH control signaling and MTCH service data are multiplexed in a third transport block of the same MBSFN subframe.
- one transport block corresponds to A Medium Access Control (MAC) Protocol Control Unit (PDU), that is, a MAC-PDU.
- MAC Medium Access Control
- PDU Protocol Control Unit
- MCCH control signaling and MTCH service data are respectively encapsulated in different Service Data Units (SDUs).
- Different SDUs have different logical channel numbers and lengths, and are in the MAC header.
- the length information of each SDU and the corresponding logical channel number are used. Therefore, in the fourth embodiment, the indication information for indicating the allocation of the MCCH control signaling resource is not needed, and the logical channel number in the MAC header can be directly used. MCCH.
- one MAC-PDU corresponds to a modulation and coding mode.
- the MCCH control signaling and the MTCH service data are encapsulated in the same MAC-PDU, which means that the two adopt the same modulation and coding mode.
- QoS quality of service
- the MCCH control signaling and the MTCH service data are multiplexed in the same TB, because the MCCH control signaling is more important than the MTCH service data, and therefore, preferably, the MCCH control signaling is to be satisfied.
- QoS Quality of service
- the MCS that multiplexes the MCCH control signaling and the MTCH service data should meet the MCCH.
- the QoS of the MCCH control signaling is higher than the QoS of the MTCH service data
- the QoS selection according to the MCCH control signaling is corresponding.
- the MCS mode satisfies the QoS requirements for MCCH control signaling. of course, If the QoS of the MCCH control signaling is lower than the QoS of the MTCH service data, the corresponding MCS mode may be selected according to the QoS of the MCCH service data.
- step S12 the base station 1 transmits the third transport block to the physical layer through the transport channel MCH and transmits it to one or more mobile stations 2 under the jurisdiction of the base station 1.
- the MCCH control signaling is transmitted by the base station 1 to the mobile station 2 only in the closest MBSFN subframe in which the adjustment period and the repetition period start.
- step S13"' the mobile station 2 first receives the MBSFN subframe containing the MCCH control signaling from the base station 1 on the period scheduled by the MP and the RP.
- step S14' the mobile station 2 decrypts the MAC-PDU, and finds the MAC-SDU corresponding to the MCCH control signaling according to the length identifier of the SDU in the MAC header of the MAC-PDU and the corresponding logical number of the SDU. And decapsulating the MAC-SDU encapsulated with MCCH control signaling. Since the subsequent steps are not highly correlated with the present invention, they are not described herein.
- the MCCH control signaling and the MTCH service data are multiplexed on the same transmission block, and the same modulation and coding mode must be used, but the QoS of the MCCH control signaling and the MTCH service data may be different.
- the description is directed to the case where both MCCH and MTCH are mapped on the MCH channel.
- the MCCH may be mapped on a DownLink-Shared Channel (DL-SCH).
- DL-SCH DownLink-Shared Channel
- the TB of the MCCH control signaling in the MBSFN subframe may be mapped onto the DL-SCH, and the TB of the MTCH service data is still mapped to the MCH. Therefore, MBSFN transmission can still be performed on the MBMS service data.
- MBSFN transmission can still be performed on the MBMS service data.
- FIG. 10 depicts a block diagram of a device in accordance with an embodiment of the present invention.
- the control device 10 shown in Fig. 10 is located in the base station 1 shown in Fig. 2.
- the control device 10 includes a processing device 100, an instruction information generating device 101, a verification device 102, and a transmitting device 103.
- the acquisition device 20 is located in the mobile station shown in FIG. 2.
- the acquisition device 20 includes a receiving device 200 and a decoding device 201.
- An MBSFN subframe is l ms , that is, a Transmission Time Interval (TTI).
- a substring contains 12 symbols (symbols), for example, 12 OFDM symbols.
- the first two symbols in one MBSFN subframe cannot be used for MBSFN transmission, but need to be reserved for transmitting Physical HARQ Indication Channel (PHICH), Common Reference Signal (CRS) And so on, in order to unicast (unicast) users to perform inter-cell handover, load balancing or interference coordination measurement, therefore, the first two symbols of the MBSFN subframe can be regarded as the Physical Downlink Control Channel (PDCCH). symbol.
- PHICH Physical HARQ Indication Channel
- CRS Common Reference Signal
- the processing apparatus 100 generates a first transport block, that is, an MCCH control signaling transport block, according to the MCCH control signaling, and generates a second transport block, that is, an MTCH service data transport block, based on the MTCH service data. Therefore, as shown in FIG. 1, MCCH control signaling and MTCH service data are multiplexed in the same subframe in the form of two transport blocks.
- the two rectangles of the first transport block and the second transport block shown in FIG. 1 are only examples, and the first transport block may be mapped on one or more resource blocks (RBs). And These resource blocks may be discrete, and the second transport block may be mapped on one or more Resource Blocks (RBs), and these resource blocks may be discrete. Therefore, in practice, the mapped pattern of resource blocks in the MBSFN subframe may be irregular.
- the instruction information generating means 101 generates MCCH related instruction information in the subframe.
- the MCCH related indication information includes, for example, a Downlink Control Indication (DCI) and an MBMS-Radio Network Temporary Indentifier (MBMS-RNTL).
- DCI Downlink Control Indication
- MBMS-RNTL MBMS-Radio Network Temporary Indentifier
- the DCI and MBMS-RNTI information may be located in the PDCCH symbol.
- the DCI format ( format ) 4 is defined, and the DCI format 4 includes the following information:
- MCS Modulation and Coding Schema
- a new service port indicator may also be included in DCI format 4.
- the newly defined DCI format 4 takes into account the necessary indications for dynamically scheduling MCCH control signals, thus omitting some other parameters defined in other DCI formats. Of course, you can also reuse the format 1, 2, etc. of the DCI that has been defined.
- the indication information generating apparatus 101 can accurately determine the resource blocks occupied by the MCCH according to the actual data amount of the MCCH to implement dynamic scheduling of the MCCH transport block; and the indication information generating apparatus 101 can according to the QoS required by the MCCH. Such information, dynamically determine the modulation and coding mode of the MCCH.
- the MBMS-RNTI is also included in the MCCH related indication message.
- a Cyclic Redundancy Check (CRC) can be performed on the DCI.
- CRC Cyclic Redundancy Check
- the RNTI includes paging RNTI (paging-RNTI), MBMS-RNTI, monthly RNTI (S-RNTI), user-specific RNTI (User specific RNTI), etc.
- Each RNTI has a certain value, in relation to There are provisions in the agreement and will not be repeated here.
- the base station 1 knows what kind of data it needs to schedule, so it adds the corresponding RNTI to the CRC check according to the actual data to be scheduled.
- the transmitting device 103 transmits the two transport blocks to the physical layer through the transport channel MCH, and transmits them to one or more mobile stations under the jurisdiction of the base station 1.
- the transmitting device 103 needs to adopt a Modification Period (MP) and a Repetition Period (RP) for the MCCH control signaling in consideration of the reliability of the transmission, the power saving mode of the UE, and the avoidance of receiving the MCCH control signaling.
- Periodic transmission mechanism One MP is equal to one scheduling period, and one MP period is equal to multiple RP periods. For example, an MP cycle contains 4 or 8 RPs.
- the transmitting device 103 transmits an MCCH message in the first MBSFN subframe frame starting from each MP or RP, and in other MBSFN subframes, MCCH signaling is not transmitted.
- the distribution of the MBSFN subframe in a scheduling period is discrete, for example, the subframe corresponding to the first period of the MP start cannot perform MBSFN transmission, and the specified MCCH control signaling must be transmitted in the form of MBSFN, so It may happen that the RP starts from the 40th subframe, and the MCCH may be transmitted in the 39th or 41st closed occasion, wherein the 39th subframe and the 41st subframe It is an MBSFN subframe. That is, the MCCH control signaling is transmitted to the mobile station only in the closest MBSFN subframe in which the adjustment period and the repetition period (RP) start.
- the control signaling message is agreed by the system, and the selection mode of each base station should be consistent.
- the MCCH message sent by the transmitting device 103 on each RP is the same. Until the MCCH message is updated, the MCCH message is updated in the closest MBSFN subframe frame started by the MP, and then the subsequent RP is updated according to the updated The MCCH message period is sent repeatedly.
- the base station 1 can augment the system message to increase the options for setting the MP and RP, and pre-transmit the system message including the MP and the RP to the mobile station 2.
- the receiving device 200 in the obtaining device 20 first receives the MBSFN subframe containing the MCCH control signaling from the base station 1 on the period scheduled by the MP and the RP.
- the decoding device 201 first reads the PDDCH symbol of the MBSFN subframe, and if the mobile station finds the DCI indication information, the decoding device 201 first performs a CRC operation on the DCI information. After the CRC operation is deactivated, the decoding device 201 can obtain the corresponding RNTI value to further determine whether the MCCH control signaling message needs to be decoded. If the MCCH control signaling message needs to be decoded and demodulated, the decoding device 201 decodes and demodulates the MCCH message according to the modulation and coding mode of the MCCH included in the PDCCH symbol. Subsequent operations of the mobile station 2 are not relevant to the present invention and therefore will not be described herein.
- the indication information generating means may also be configured as MCCH related indication information, and then the processing apparatus 100 generates two transport blocks multiplexed on one MBSFN subframe according to the MCCH control signaling and the MTCH service data, respectively.
- FIG 11 depicts a block diagram of a device in accordance with another embodiment of the present invention.
- the control device 10 shown in Fig. 11 is located in the base station 1 shown in Fig. 4.
- the control device 10 includes a processing device 100 and a transmitting device 103.
- the acquisition device 20 is located in the mobile station shown in FIG.
- the acquisition device 20 includes a receiving device 200 and a decoding device 201.
- the processing apparatus 100 generates a first transport block according to the MCCH control signaling, and generates a second transport block according to the MTCH service data. Therefore, as shown in FIG. 3, the MCCH control signaling and the MTCH service data are two.
- the form of the transport blocks is multiplexed in the same subframe.
- the resource allocated by the processing device 100 for MCCH control signaling is fixed and reserved at a predetermined position and size. For example, the processing device 100 may be fixedly The first symbol following the two PDCCH symbols is reserved for transmission of MCCH control signaling. Then, the remaining 9 resource blocks in the MBSFN subframe can be used for transmission of MTCH service data.
- first transport block and the second shown in FIG. The two rectangles of the transport block are only examples, the first transport block may be mapped on one or more resource blocks, and the resource blocks may be discrete, and the second transport block may be mapped on one or more resource blocks, and These resource blocks can be discrete. Therefore, in practice, the mapping pattern of resource blocks in MBSFN subframes may be irregular.
- the transmitting device 103 transmits the two transport blocks to the physical layer through the transport channel MCH, and transmits them to one or more mobile stations under the jurisdiction of the base station 1.
- the MCCH control signaling is transmitted to the mobile station only in the closest MBSFN subframe in which the adjustment period and the repetition period start.
- the receiving device 200 first receives the MBSFN subframe containing the MCCH control signaling from the base station 1 on the period scheduled by the MP and the RP.
- the receiving device 200 is further configured to, according to, for example, the MCS of the MCCH message acquired from the system message.
- the decoding device 201 decodes and demodulates the MCCH message according to the MCS according to the modulation and coding scheme of the MCCH message acquired from the receiving device 200. Subsequent operations of the mobile station 2 are not relevant to the present invention and therefore will not be described herein.
- control device 10 may further include an indication information generating device 101 (not shown in FIG. 11) for adding the indication to the 2 PDCCH symbols.
- Figure 12 depicts a block diagram of a device in accordance with another embodiment of the present invention.
- the control device 10 shown in Fig. 12 is located in the base station 1 shown in Fig. 6.
- the control device 10 includes a package device 104 and a transmitting device 103.
- the acquisition device 20 is located in the mobile station shown in FIG.
- the acquisition device 20 includes a receiving device 200 and a decoding device 201.
- the encapsulating device 104 exclusively encapsulates the MCCH control signaling into one MBSFN subframe. Therefore, as shown in FIG. 5, the transport block of the MCCH control signaling occupies one MBSFN subframe, and the MCCH control signaling and the MTCH service data are not multiplexed, meaning that the MCCH control signal cannot be transmitted in one MBSFN subframe at the same time. Order and MTCH business data.
- the resource allocation starts from the foremost resource after the start of the PDCCH symbol, and the MCCH control signaling is only the closest MBSFN subframe starting at the adjustment period and the repetition period.
- the medium is transmitted to the mobile station. Therefore, in the third embodiment, the indication information for indicating the resource allocation of the MCCH is also not required.
- the transmitting device 103 transmits the one transport block generated by the encapsulating device 104 to the physical layer through the transport channel MCH, and transmits it to one or more mobile stations under the jurisdiction of the base station 1.
- the MCCH control signaling is transmitted to the mobile station only in the closest MBSFN subframe in which the adjustment period and the repetition period start.
- the receiving device 200 first receives the MBSFN subframe containing the MCCH control signaling from the base station 1 on the period scheduled by the MP and the RP.
- the receiving device 200 is also based on, for example, the MCS of the MCCH message acquired from the system message.
- the decoding device 201 is based on the modulation and coding method acquired by the receiving device 200.
- the MCCH message is decoded and demodulated. Subsequent operations of the mobile station 2 are not relevant to the present invention and therefore will not be described herein.
- the rectangle of the transport block shown in FIG. 5 is only an example, and the transport block can be mapped on one or more resource blocks, and the resource blocks can be discrete, so, in fact, resources
- the mapping of blocks on resource blocks of MBSFN subframes may be irregular.
- control device 10 may further include an indication information generating device 101 (not shown in FIG. 12) for adding the indication to the 2 PDCCH symbols.
- the amount of data of the MCCH control signaling is relatively small.
- the transmission of the MCCH control signaling is exclusive to the entire subframe, and the MTCH service data is not multiplexed in the subframe. Therefore, the resource utilization of the third embodiment is utilized. The rate is lower.
- Figure 13 depicts a block diagram of a device in accordance with another embodiment of the present invention.
- the control device 10 shown in Fig. 13 is located in the base station 1 shown in Fig. 8.
- the control device 10 includes a processing device 100, a modulation and coding mode determining device 105, and a transmitting device 103.
- the acquisition device 20 is located in the mobile station shown in FIG.
- the acquisition device 20 includes a receiving device 200 and a decoding device 201.
- the control device 10 multiplexes MCCH control signaling and MTCH service data in a third transport block of the same MBSFN subframe.
- one transport block corresponds to one Media Access Control (MAC) Protocol Control Unit (PDU), which is a MAC-PDU.
- MAC Media Access Control
- PDU Media Access Control Unit
- FIG. 9 in a MAC-PDU, since the MCCH and the MTCH are different logical channels, the MCCH control signaling and the MTCH service data are respectively encapsulated in different Service Data Units (SDUs). .
- SDUs Service Data Units
- Different SDUs have different logical channel numbers and lengths.
- the length information of each SDU and the corresponding logical channel number are included in the MAC header. Therefore, in the fourth embodiment, the indication information for indicating the allocation of the MCCH control signaling resource is not needed, and the MAC header is directly used.
- the MCCH can be found by the logical channel number in .
- one MAC-PDU corresponds to a modulation coding mode.
- the MCCH control signaling and the MTCH service data are encapsulated in the same MAC-PDU, which means that the two adopt the same modulation and coding mode.
- QoS quality of service
- the MCCH control signaling and the MTCH service data are multiplexed in the same TB, since the MCCH control signaling is more important than the MTCH service data, and therefore, preferably, the MCCH control signaling is to be satisfied.
- QoS quality of service
- the MCS that multiplexes the MCCH control signaling and the MTCH service data should satisfy the MCCH.
- the modulation and coding mode determining apparatus 105 controls the MCCH according to the MCCH.
- the QoS of the signaling selects the corresponding MCS mode to meet the QoS requirements for MCCH control signaling.
- the modulation and coding mode determining means 105 can also select the corresponding MCS mode according to the QoS of the MCCH service data.
- the transmitting device 103 transmits the third transport block to the physical layer through the transport channel MCH, and transmits it to one or more mobile stations 2 under the jurisdiction of the base station 1.
- the MCCH control signaling is transmitted by the base station 1 to the mobile station 2 only in the closest MBSFN subframe in which the adjustment period and the repetition period start.
- the receiving device 200 first receives the cycle scheduled by the MP and the RP.
- the decoding device 201 decrypts the MAC-PDU, finds the MAC-SDU corresponding to the MCCH control signaling according to the length identifier of the SDU in the MAC header of the MAC-PDU, and the corresponding logical number of the SDU, and encapsulates the MCCH control.
- the MAC-SDU of the signaling is decapsulated. Since the subsequent steps are not highly correlated with the present invention, the advantages of the eighth embodiment are not here:
- the MCCH control signaling and the MTCH service data are multiplexed on the same transmission block, and the same modulation and coding mode must be used, but the QoS of the MCCH control signaling and the MTCH service data may be different.
- the description is directed to the case where both MCCH and MTCH are mapped on the MCH channel.
- the MCCH may be mapped on a DownLink-Shared Channel (DL-SCH).
- DL-SCH DownLink-Shared Channel
- the TB of the MCCH control signaling in the MBSFN subframe may be mapped to the DL-SCH, and the TB of the MTCH service data is still mapped to the MCH. Therefore, MBSFN transmission can still be performed on the MBMS service data.
- the devices described in the foregoing embodiments are defined by using functional modules, and different sub-devices in the foregoing embodiments may also be implemented by the same hardware, for example, in the fifth embodiment.
- the processing device 100, the indication information generating device 101, and the verification device 102 can be implemented by being integrated in the same hardware.
- the child devices performing the same functions in different embodiments can also be implemented by the same hardware, for example, an embodiment.
- the processing device 100 of the fifth and the packaging device 104 of the seventh embodiment can also be implemented by the same physical hardware.
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Description
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Priority Applications (7)
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US13/266,318 US8755323B2 (en) | 2009-04-28 | 2009-04-28 | Method and apparatus for transmitting MCCH control signaling in MBSFN manner |
PCT/CN2009/000460 WO2010124416A1 (zh) | 2009-04-28 | 2009-04-28 | 实现mbsfn方式传输mbms控制信令的方法和装置 |
KR1020117025747A KR101334824B1 (ko) | 2009-04-28 | 2009-04-28 | Mbsfn 방식으로 mcch 제어 시그널링을 송신하기 위한 방법 및 장치 |
EP09843828.6A EP2434785B1 (en) | 2009-04-28 | 2009-04-28 | Method and device for realizing mbms control signaling transmission in mbsfn manner |
CN2009801557005A CN102301750B (zh) | 2009-04-28 | 2009-04-28 | 实现mbsfn方式传输mbms控制信令的方法和装置 |
JP2012507561A JP5787877B2 (ja) | 2009-04-28 | 2009-04-28 | Mbsfn方式でmcch制御信号を伝送する方法および装置 |
US14/269,230 US20140241233A1 (en) | 2009-04-28 | 2014-05-05 | Method and apparatus for transmitting mcch control signaling in mbsfn manner |
Applications Claiming Priority (1)
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PCT/CN2009/000460 WO2010124416A1 (zh) | 2009-04-28 | 2009-04-28 | 实现mbsfn方式传输mbms控制信令的方法和装置 |
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US13/266,318 A-371-Of-International US8755323B2 (en) | 2009-04-28 | 2009-04-28 | Method and apparatus for transmitting MCCH control signaling in MBSFN manner |
US14/269,230 Continuation US20140241233A1 (en) | 2009-04-28 | 2014-05-05 | Method and apparatus for transmitting mcch control signaling in mbsfn manner |
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EP (1) | EP2434785B1 (zh) |
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CN (1) | CN102301750B (zh) |
WO (1) | WO2010124416A1 (zh) |
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JP2016208548A (ja) * | 2011-09-09 | 2016-12-08 | インターデイジタル パテント ホールディングス インコーポレイテッド | ローカライズドアプリケーションにアクセスするための方法および装置 |
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US8441976B2 (en) * | 2009-06-29 | 2013-05-14 | Htc Corporation | Method of managing multimedia broadcast multicast service reception and related communication device |
CN101969602B (zh) * | 2009-07-28 | 2012-06-27 | 电信科学技术研究院 | 信道内容变更通知及信道重检测方法、系统和设备 |
US9603169B2 (en) * | 2010-11-05 | 2017-03-21 | Pantech Inc., Ltd. | Method and device for transmitting and receiving aperiodic reference signal |
KR101943821B1 (ko) | 2011-06-21 | 2019-01-31 | 한국전자통신연구원 | 무선 통신 시스템에서 제어채널 송수신 방법 |
US9326270B2 (en) * | 2013-01-17 | 2016-04-26 | Industrial Technology Research Institute | Data transmission method through point to multi-point transmission service |
WO2014119847A1 (ko) * | 2013-02-01 | 2014-08-07 | 엘지전자 주식회사 | Mbsfn 서브프레임 송신 및 수신 방법 및 장치 |
CN105556996B (zh) * | 2014-08-22 | 2019-04-05 | 华为技术有限公司 | Mbms中群组业务数据的传输方法、基站和用户设备 |
US20160192294A1 (en) * | 2014-12-27 | 2016-06-30 | Ajay Panchal | POWER SAVING TECHNIQUES FOR eMBMS |
WO2017135700A1 (ko) * | 2016-02-05 | 2017-08-10 | 엘지전자 주식회사 | Mbms 서비스를 적응적으로 수신하는 방법 및 장치 |
KR102458067B1 (ko) * | 2016-03-30 | 2022-10-24 | 삼성전자 주식회사 | 이동 통신 시스템에서의 신호 전송 방법 및 장치 |
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- 2009-04-28 US US13/266,318 patent/US8755323B2/en not_active Expired - Fee Related
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JP2012525730A (ja) | 2012-10-22 |
US8755323B2 (en) | 2014-06-17 |
KR20120018133A (ko) | 2012-02-29 |
EP2434785A4 (en) | 2014-11-12 |
JP5787877B2 (ja) | 2015-09-30 |
KR101334824B1 (ko) | 2013-11-29 |
US20120044826A1 (en) | 2012-02-23 |
CN102301750B (zh) | 2013-06-12 |
CN102301750A (zh) | 2011-12-28 |
EP2434785A1 (en) | 2012-03-28 |
US20140241233A1 (en) | 2014-08-28 |
EP2434785B1 (en) | 2015-09-23 |
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