CN102047699B - Uplink channel for point to multipoint multimedia broadcast and multicast service - Google Patents
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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
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
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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
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/1874—Buffer management
- H04L1/1877—Buffer management for semi-reliable protocols, e.g. for less sensitive applications like streaming video
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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
- H04L2001/0092—Error control systems characterised by the topology of the transmission link
- H04L2001/0093—Point-to-multipoint
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- H—ELECTRICITY
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- H04W72/30—Resource management for broadcast services
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Abstract
A base station, user terminal, computer readable medium and method for accepting an uplink channel, for a point-to-multipoint (P-t-M) multimedia broadcast and multicast service (MBMS) transmission mode, from multiple user terminals to a base station, the base station serving the multiple user terminals in a communication network. The method includes: setting up a downlink MBMS traffic channel (MTCH) from the base station to the multiple user terminals; transmitting first data from the base station via the MTCH channel in the P-t-M mode, wherein the P-t-M mode pushes data from the base station to the multiple user terminals; receiving from the multiple user terminals messages via an uplink MBMS Feedback Channel (MFCH), wherein the messages indicate whether the first data transmitted from the base station has been decoded successfully or not at the multiple user terminals; and deciding whether to transmit second data or retransmit the first data from the base station to the multiple user terminals based on the received messages.
Description
Technical field
The present invention relates in general to wireless communication system, equipment, software and method, more specifically, relates to the mechanism for the uplink communication of point-to-multipoint in communication network (P-t-M) multicast broadcast multimedia service (MBMS) and technology.
Background technology
In the past few years, in wireless access technology for providing the interest of voice, video and data, services constantly to increase.There is the multiple telecommunication technology used in cellular communications.For mobile communication, the most widely used wireless access technology is digital cellular.The interest increased has been shown in 3G (third generation) system.A this 3G system is based on Time Division-Synchronous Code Division Multiple Access access (TD-SCDMA), and this system may be a standard that will use in China.
International Telecommunications Union (ITU) adopts time division duplex (TDD) option of TD-SCDMA as international mobile telecommunication-2000 (IMT-2000).The main TDD version that-Frequency Division Duplexing (FDD) (WCDMA-FDD) that is considered to TD-SCDMA to access with the Wideband Code Division Multiple Access (WCDMA) of 3GPP accompanies.An advantage of TDD is used to be, do not need to use symmetrical uplink/downlink frequency spectrum, therefore this system support spectrum utilization and distribution more flexibly, and can for up link and down link, the number of time slot in a radio frames freely in dynamic conditioning frequency band, the therefore asymmetrical characteristic of network enabled up link and down link.
TD-SCDMA system expected design adopts the advantage of following technology: (1) intelligent antenna technology, namely can form antenna beam to follow the tracks of each user, as space division multiple access access (SDMA), thus strengthens link budget; And (2) TDD and code division multiple access access (CDMA), time division multiple access access (TDMA) and CDMA combine by permission system, make the number of users in each time slot can keep less, to carry out joint-detection, joint-detection can reduce multiple access interference (MAI), and can alleviate the problem strengthening power system capacity.TD-SCDMA is also the synchro system between a kind of base station and travelling carriage, particularly like this in up link.Therefore, the MAI between user can be alleviated, can link budget be increased, thus increase power system capacity.
TD-SCDMA can support that high-speed downlink packet accesses (HSDPA), HSDPA supports channel (being called HS-DSCH, for high-speed downlink shared channel) based on the shared high-speed down link used when transmitting packet to terminal equipment.HSDPA is considered to improve throughput in down link (DL), delay and spectrum efficiency.
TD-SCDMA also can support multicast broadcast multimedia service (MBMS) technology.This technology is introduced into released version 6 and the released version 7 of 3GPP standard.It is developed based on WCDMA and WCDMA HSDPA.For WCDMA and flavor thereof, due to Radio Resource restriction, MBMS expection adds realization in (HSPA+) and LTE (Long Term Evolution) in WCDMA HSDPA, high-speed packet access.Such as, WCDMA HSDPA provides flow transmission type and high-power carrying, to guarantee service quality (QoS) and to guarantee that the data broadcasted arrive little area carrier.Modulation and Coding Scheme (MCS) can be used by different data rate to different application.
Use MBMS, in unidirectional mode, identical content can be sent to the multiple users being arranged in appointed area (MBMS district).MBMS district can cover multiple community.Different but the situation about being closely related of broadcast and multicast conceptual description.In the broadcast, can set up point-to-multipoint Radio Resource in each community of the part as MBMS broadcast area, all users subscribing to broadcast service receive identical transmission signal simultaneously.Move forward into line trace not to user in wireless access network, user can receive content and not need informing network.Mobile TV is the example can being broadcasted the service provided by MBMS.
In multicast, add multicast group for request before any data of reception.Can move forward into line trace to user, can be match radio-resource-configuration with the number of users in each community.Each community in MBMS multicast area can be configured to point-to-point (P-t-P) or point-to-multipoint transmission.Therefore, multicast allows network to be optimized the transport-type in each community.
For MBMS, there is the air interface mechanism of two types, i.e. P-t-P and P-t-M.In P-t-P interface, a pair dedicated channel (up link (UL) and down link (DL)) is for being connected with between base station each MBMS user.In P-t-M interface, only have DL channel for from base station to MBMS receiver (or MS receiver) propelling movement/broadcast multimedia service, and with there is how many MBMS receiver and have nothing to do.Even if there is not MBMS receiver, P-t-M interface also sends multimedia service on DL channel.Therefore, because P-t-P interface can keep/process the QoS of MBMS transmission, P-t-M interface can not realize the service/performance with P-t-P interface same levels.
In addition, P-t-M interface does not support beam forming, because there is not the angle of arrival (AoA) measurement report feedback in UL, AoA measurement report feedback is one of required feature of TD-SCDMA.Therefore, when realizing in TD-SCDMA, MBMS system is in the face of many challenges, such as, as the network coverage balance according to traditional standard (as 3GPP R4 (TD-SCDMA) and R5 (TD-SCDMAHSDPA)), time slot change, power division and optimization, number of channelization codes and the proprietary characteristic of some TD-SCDMA, N ZAP.During any MBMS in TD-SCDMA system realizes, consider that above-mentioned advanced will be favourable.
China's Telecommunication's ANSI (CCSA) has issued the first version of TD-SCDMA MBMS specification, wherein, secures same time slot networking (UTN) and broadcast.But this is the released version having much room for improvement to comprise MBMS (MBSFN) and the multicast such as with single frequency network.
Correspondingly, expect to provide for voice and video communication equipment, the system and method for avoiding the problems referred to above and defect.
Summary of the invention
According to example embodiment, there is a kind of method accepting the uplink channel from multiple user terminal to base station for point-to-multipoint (P-t-M) multicast broadcast multimedia service (MBMS) transmission mode, described base station is the multiple subscriber terminal service in communication network.Described method comprises: set up the down link MBMS channel (MTCH) from base station to multiple user terminal; In P-t-M pattern, via MTCH channel, send the first data from base station, wherein, data are pushed to multiple user terminal from base station by P-t-M pattern; Via up link MBMS feedback channel (MFCH), from multiple user terminal receipt message, wherein, whether the first data that described message instruction sends from base station are successfully decoded at multiple user terminal; And judge that will send the second data from base station to multiple user terminal still retransmits the first data based on received message.
According to another example embodiment, there is a kind of computer-readable medium, comprise computer-readable instruction, wherein, when the processor by base station performs, described instruction makes base station accept the uplink channel from multiple user terminal to base station for point-to-multipoint (P-t-M) multicast broadcast multimedia service (MBMS) transmission mode, and described base station is the multiple subscriber terminal service in communication network.Described instruction comprises: set up the down link MBMS channel (MTCH) from base station to multiple user terminal; In P-t-M pattern, via MTCH channel, send the first data from base station, wherein, data are pushed to multiple user terminal from base station by P-t-M pattern; Via up link MBMS feedback channel (MFCH), from multiple user terminal receipt message, wherein, whether the first data that described message instruction sends from base station are successfully decoded at multiple user terminal; And judge that will send the second data from base station to multiple user terminal still retransmits the first data based on received message.
According to another example embodiment, there is a kind of base station, be configured to the uplink channel accepting from multiple user terminal to base station for point-to-multipoint (P-t-M) multicast broadcast multimedia service (MBMS) transmission mode, described base station is the multiple subscriber terminal service in communication network.Described base station comprises: processor, is configured to set up from base station to the down link MBMS channel (MTCH) of multiple user terminal; Transceiver, be connected to processor, be configured in P-t-M pattern, send the first data via MTCH channel, wherein, data are pushed to multiple user terminal from base station by P-t-M pattern, described transceiver is also configured to via MBMS feedback channel (MFCH), from multiple user terminal receipt message, wherein, whether the data that described message instruction sends from base station are successfully decoded at multiple user terminal; And described processor is also configured to: based on received message, instruction transceiver sends the second data to multiple user terminal or retransmits the first data.
According to another embodiment, exist a kind of for multicast broadcast multimedia service (MBMS) transmission mode, there is provided the method for the uplink channel from the user terminal multiple user terminal to base station, described base station is the multiple subscriber terminal service in communication network.Described method comprises: at user terminal place, and in P-t-M pattern, down link MBMS channel (MTCH) receives data from base station, and wherein, data are pushed to multiple user terminal from base station by P-t-M pattern; At user terminal place, determine whether data are successfully decoded; And via up link MBMS feedback channel (MFCH), send message from user terminal to base station, wherein, whether the data that described message instruction sends from base station are successfully decoded.
According to another embodiment, provide a kind of computer-readable medium, comprise computer-readable program, wherein, when the processor by the user terminal in multiple user terminal performs, described instruction makes user's terminal pins to multicast broadcast multimedia service (MBMS) transmission mode, sets up the uplink channel from user terminal to base station, and described base station is the multiple subscriber terminal service in communication network.Described instruction comprises: at user terminal place, and in P-t-M pattern, down link MBMS channel (MTCH) receives data from base station, and wherein, data are pushed to multiple user terminal from base station by P-t-M pattern; At user terminal place, determine whether data are successfully decoded; And via up link MBMS feedback channel (MFCH), send message from user terminal to base station, wherein, whether the data that described message instruction sends from base station are successfully decoded.
According to example embodiment, provide the user terminal in multiple user terminal; Be configured to, for multicast broadcast multimedia service (MBMS) transmission mode, set up the uplink channel from user terminal to base station, described base station is the multiple subscriber terminal service in communication network.Described user terminal comprises: transceiver, is configured in P-t-M pattern, and down link MBMS channel (MTCH) receives data from base station, and wherein, data are pushed to multiple user terminal from base station by P-t-M pattern; Whether processor, is connected to transceiver, be configured to detect data and be successfully decoded; And processor is also configured to instruction transceiver via up link MBMS feedback channel (MFCH) to base station transmission message, wherein, whether the data that described message instruction sends from base station are successfully decoded at user terminal.
Abbreviated list
P-t-P is point-to-point
P-t-M point-to-multipoint
MBMS multicast broadcast multimedia service
MS multicast service
TD MBMS TD-SCDMA MBMS
TD-SCDMA Time Division-Synchronous Code Division Multiple Access accesses
3GPP third generation partner program
The AoA angle of arrival
UTN is with time slot networking
MBSFN has the MBMS of single frequency network
HSDPA high-speed downlink packet accesses
HSUPA High Speed Uplink Packet accesses
HSPA high-speed packet accesses
EUL enhanced uplink
CCSA China's Telecommunication ANSI
QoS service quality
UL up link
DL down link
LTE (3G system) Long Term Evolution
RNC radio network controller
MSC Modulation and Coding Scheme
HoS order sectorization
MTCH MBMS channel
MCCH MBMS Control Channel
MICH MBMS indicating channel
MFCH MBMS feedback channel
FDD Frequency Division Duplexing (FDD)
TDD time division duplex
FACH forward access channel
RACH Random Access Channel
SCCPCH Secondary Common Control Physical Channel
PRACH Physical Random Access Channel
RANAP Radio Access Network application protocol
CN core net
GPRS general packet radio service
GSN GPRS Support Node
GGSN Gateway GPRS Support Node
SGSN Serving GPRS Support Node
RAN wireless access network
NBAP Node B application protocol
TTI Transmission Time Interval
CC Chase merges
IR incremental redundancy
The DoA angle of arrival
MIMO multiple-input and multiple-output
HoS order sectorization
UTRAN universal land radio access web
Accompanying drawing explanation
By reference to the accompanying drawings and form the part of specification, illustrate one or more embodiment, and explain these embodiments together with the description.In accompanying drawing:
Fig. 1 is the schematic diagram of communication network;
Fig. 2 is the schematic diagram of base station according to example embodiment and/or user terminal;
Fig. 3 is the schematic diagram illustrating the various channels used in MBMS system;
Fig. 4 illustrates the schematic diagram according to the new uplink channel in the MBMS system of example embodiment;
Fig. 5 is the schematic diagram illustrating the signal exchanged between each assembly of communication system according to example embodiment;
Fig. 6 illustrates the flow chart according to example embodiment step that communication system performs during MBMS session;
Fig. 7 illustrates the flow chart according to example embodiment step that base station performs during MBMS session; And
Fig. 8 illustrates the flow chart according to example embodiment step that user terminal performs during MBMS session.
Embodiment
The following description of example embodiment is carried out with reference to accompanying drawing.In different figures, identical reference number identifies same or analogous element.Below describe in detail and do not limit the present invention.Instead, scope of the present invention is limited by claims.For simplicity, about the term of above-mentioned TD-SCDMA system and structure, following examples are discussed.But the embodiment next will discussed is not limited to these systems, but other existing telecommunication system, such as WCDMA etc. can be applied to.In addition, describe although following the term using and be exclusively used in TD-SCDMA system, using term base station, terminal equipment, wireless control network in general sense.Such as, term " base station " can comprise wireless base station (RBS), Node B, eNode B or other nodes.Term " terminal equipment " can comprise mobile phone, personal digital assistant, video camera etc.
Run through specification, mean " embodiment " or quoting of " embodiment ", the special characteristic in conjunction with the embodiments described, structure or characteristic comprise at least one embodiment of the present invention.Therefore, phrase " in one embodiment " that specification occurs is run through everywhere or " in an embodiment " must all not refer to identical embodiment.In addition, in one or more embodiments, special characteristic, structure or characteristic can be combined in any suitable manner.
As shown in Figure 1, according to example embodiment, general telecommunication system 10 can comprise the user terminal (UE) 12 being connected to NodeB 14 via communication link 16.NodeB 14 can be connected to radio network controller (RNC) 18 via interface 20 (such as S 1 interface).The element discussed about Fig. 1 above can form wireless access network (RAN) 22.RAN 22 is connected to communication network (CN) 24, CN 24 can comprise Serving GPRS Support Node (SGSN) 26, mobile management entity (MME) 28 and Public Switched Telephone Network (PSTN) 29.
User terminal 12 and/or Node B 14 can have the structure shown in Fig. 2.Fig. 2 illustrates, terminal equipment 12 and/or Node B 14 can comprise: the processor 30 being connected to memory 32 via bus 34.Processor 30 can be configured to process and sends or receive subpackage or set up the relevant information of uplink channel.Memory 32 can be configured to the information needed for work of various data that storage of processor 30 uses or the equipment information that will send or equipment.Terminal or base station can comprise I/O unit 36, and I/O unit 36 is configured to (such as from user) and receives order and send order.Transceiver 38 can be connected to bus 34, and is configured to receive or send a point package informatin.Transceiver 38 can comprise array antenna.Dispatcher unit 39 can be connected to bus 34 with operation dispatching function.These functions also can be performed by processor 30.
Next, the structure of MBMS is discussed, and explains the new feature adding this system.In order to simply, the structure of MBMS system is discussed, but new example embodiment is also applicable to MS system.There is the multiple physical channel that MSMS uses: MTCH (MBMS channel), MCCH (MBMS Control Channel) and MICH (MBMS indicating channel).These channels are the downlink channel shown in Fig. 3.MCCH and MICH channel uses FACH channel as transmission channel, uses S-CCPCH channel as physical channel, because the existing channel of the design reuse of MBMS.
According to example embodiment, as shown in Figure 4, with the addition of new channel.This new channel is called MFCH (MBMS feedback channel).In FDD and tdd mode, the P-t-M interface in MBMS can use this channel.This channel can be shared by some or all in P-t-M MBMS user, such as, shared by time-multiplexed mode in up link.MFCH channel is a kind of uplink channel, and terminal can use this channel to provide feedback to not relevant to MBMS system (being specially P-t-M multicast system) base station.
How integrated with other channels in order to understand this channel better, next consider sample situation.According to example embodiment, user has two kinds of methods to provide feedback to avoid the mode of conflicting between user to base station.One method is dispatched each user with special time, to provide feedback to base station.Such as, dispatching command can be indicated on MCCH or MICH channel.Second method when does not provide feedback to dispatch to base station to user, but allow user to carry out blind feedback in fixing or flexible time section.This time period can depend on the number receiving user.Multiple user can share new channel to improve wireless resource utility efficiency.
According to example embodiment, the third method is, in the usable radio resources in MFCH, distributes one or more fixed bit for feedback (the one or more codes in a uplink time slot), then, Node B knows which feedback bits belongs to each user.Another kind method is, in multicast mode, feeds back in same channel (radio resource unit), wherein carries out scrambling to the proprietary mark of UE.Then, NodeB knows the UE ID in each multicast group, and NodeB uses the proprietary ID matched filter of UE, is separated the information from each user based on the overlapped signal received in a channel.
To send which kind of content in the channel, how share this channel between users, how to perform relevant QoS and to control and which kind of can be that the detail that suitable feedback time section is correlated with can change according to realization time period.But next discussion one is this may realize.According to example embodiment, whether the content in MFCH can comprise transmission last time and successfully indicate, indicate the parameter of current radio link quality or channel quality information (CQI) (feedback as in HSDPA) and/or can be happy bit (happy bit) (feedback as in HSPUA/EUL).Based on method discussed above, in the time domain, the mode sharing UL between each user can be varied.Such as, the feedback being used to indicate QoS from user terminal to base station can be performed based on tuning transmission block size or re-transmission or increase/reduction through-put power or other technologies.In an example embodiment, QoS relevant parameter can be identical for all P-t-M MS users in group (unit for P-t-M multicast).The time period of feedback can be fixing, identical for all P-t-M users; Or variable, different for each P-t-M user.
In the exemplary embodiment, Fig. 5 show the step of carrying out in MS session and for MS session for sending the channel of signal.To this, note, example embodiment described herein is suitable for MS and MBMS session.In order to simply, next MBMS session is described.Fig. 5 shows user terminal 12, Node B 14, RNC 18 and core net (CN) 50.CN 50 by use again authentication request (RAR) and again certification answer (RAA) and send signal to RNC 18, thus in step 52, start MBMS session.In step 54, RNC 18 sends corresponding MBMS commencing signal to Node B 14.In step 56, RNC 18 initiates transmission channel for Node B 14 and sets up, and sends MCCH and MICH channel to initiate MBMS session in step 58.Therefore, in step 58, logic channel MTCH broadcasting MBMS information.Logic channel MTCH is mapped to transmission channel FACH to Node B 14 in step 60, and maps to the physical channel SCCPCH to user terminal 12 in step 62.According to example embodiment, introduce new step 64 (making in Fig. 5 to be shown in broken lines) and realize from user terminal 12 to Node B 14 and/or the feedback to RNC18.In step 64, use new logic channel MFCH to perform feedback, MFCH is mapped to transmission channel RACH, and RACH is mapped to physical channel PRACH in the step 68 further, can carry out predefine to detailed content wherein.
According to example embodiment, the content of PRACH channel can be ACK/NACK bit and/or happy bit, and/or the information of similar CQI, and to indicate, whether transmission is correctly received, whether current propagation can accept and/or some other scheduled transmission forms.Content depends on the service of actual RAN design and devdlop.Step 68,70,72 and 74 and above-mentioned steps 60,62,64 and 66 similar, and these steps can be unsuccessful and carry out when can carry out the re-transmission of initial data for some reason in step 64 and 66 instruction transmission.
In fact, can in NodeB predefine related algorithm or method, with carry out based on these message re-transmission judge.To this, according to example embodiment, when NodeB receives " N " individual feedback from total " M " individual P-t-M multicast MBMS user (wherein N is less than or equal to M), NodeB can judge the signal retransmitting last time.If N is less, then NodeB can judge not re-transmitted signal.But if N is comparatively large, NodeB can judge to retransmit this signal.The threshold value of N is determined by Virtual network operator, and can depend on number and other network-related parameters of user, or can dynamic calculation.Such as, if N is less than M/2, then do not retransmit.If N is more than or equal to M/2, then NodeB judges the signal retransmitting last time.But in this exemplary embodiment, the QoS relative parameters setting receiving user's group of identical signal is identical for each user in group.
According to example embodiment, based on the step described about Fig. 6, general processor can be programmed, to realize the new feedback channel described in one of above-mentioned example embodiment.In step 600, start MBMS session, and between CN 50 and universal land radio access web (UTRAN), Node B applying portion (NBAP) sets up transmission channel.In step 602, send MBMS data from Node B 14 to user terminal 12 along channel MTCH/FACH/SCCPCH.The distribution of specifying based on MCCH and MICH channel and instruction carry out MBMS transmission data.
After user terminal receives MBMS subpackage in subframe or Transmission Time Interval (TTI), in step 604, user terminal determines that from the transmission of base station be new transmission or re-transmission.If determination result receives new transmission, then user terminal determines whether in step 606 new transmission of can decoding.If the result in step 604 receives re-transmission, then in step 608, user terminal can use additive process the information of re-transmission and the subpackage received to be merged.Such as, user terminal can use Chase merging (CC) or incremental redundancy (IR) process as additive process.After execution step 608, method advances to step 606.
Determination in step 606 can based on different designs, such as check in MICH new/designator again, or by using additivity transmission block numbering.When step 606 is determined to decode the subpackage received, in step 610, user terminal can produce ACK or NACK order based on reception result.This order and other information, such as channel status, can feed back to base station.In step 612, this information can send it back base station via new MFCH channel, and this channel is mapped to transmission channel RACH, and RACH is mapped to physical channel PRACH then.This channel group is closed and is exemplarily presented, and is not intended to limit the present invention.
When base station receives the subpackage of above-mentioned MBMS feedback from user terminal on a new channel, base station determines that this order is ACK or NACK.If the order received is ACK, then in step 614, base station judges that all users successfully have received transmission last time, and in step 616, source data is deleted in base station from its buffer.But if the order received is NACK, then in step 618, one or more user terminal unsuccessful reception transmission last time is determined in base station.Then, base station determines whether re-transrrits MBMS data.For this situation, in step 618, first base station determines whether the re-transmission time arrives the predetermined threshold that can accept the re-transmission time.If so, then in step 620, MBMS data transmission failure is determined in base station, and method advances to step 616.Otherwise in step 622, plan retransmits, and method returns step 602.Determine transmission success or due to time lapse condition and determine transmission failure after, in step 616, the raw MBMS data preserved in the buffer of Node-B can be deleted.
Example embodiment according to Fig. 7, the processor of base station can be programmed or be configured to the method accepting the uplink channel from multiple user terminal to base station for P-t-M MBMS transmission pattern, and described base station is the multiple subscriber terminal service in communication network.Described method comprises: in step 700, sets up the down link MBMS channel (MTCH) from base station to multiple user terminal; In step 702, in P-t-M pattern, via MTCH channel, send the first data from base station, wherein, data are pushed to multiple user terminal from base station by P-t-M pattern; In step 704, via up link MBMS feedback channel (MFCH), from multiple user terminal receipt message, wherein, whether the first data that described message instruction sends from base station are successfully decoded at multiple user terminal; And in step 706, judge that will send the second data from base station to multiple user terminal still retransmits the first data based on received message.
Example embodiment according to Fig. 8, the processor of user terminal can be programmed or be configured to for multicast broadcast multimedia service (MBMS) transmission mode, there is provided the method for the uplink channel from the user terminal multiple user terminal to base station, described base station is the multiple subscriber terminal service in communication network.Described method comprises: in step 800, and at user terminal place, in P-t-M pattern, down link MBMS channel (MTCH) receives data from base station, and wherein, data are pushed to multiple user terminal from base station by P-t-M pattern; In step 802, at user terminal place, determine whether data are successfully decoded; And in step 804, via up link MBMS feedback channel (MFCH), send message from user terminal to base station, wherein, whether the data that described message instruction sends from base station are successfully decoded.
Said method may be used for FDD and TDD MBMS system, can also be used for FDD and the TDD MBMS system with advanced antennas.To this, FDD and the TDDMBMS system with advanced antennas sends the service based on multiple-input and multiple-output (MIMO) or beam forming technique based on 3GPP technical specification released version 4 (RF) and released version 5 (R5), wherein, achieve gain owing to introducing advanced antennas, but these systems send MBMS data with broadcast mode.Therefore, these are had to the system of advanced antennas, the imbalance existed between different service covers, because do not provide the support to MIMO or beam forming technique for the uplink feedback of MBMS data transmission.By introducing above-mentioned feeding back uplink link channel in MBMS system, the other information that this channel can provide advanced antennas to realize needed for beam forming, therefore, advanced antennas also can carry out work for MBMS.Therefore, uneven covering problem can be reduced.
For TD-SCDMA, this new channel can also provide the support to using the smart antenna solutions of R4 and R5 in TD MBMS network.TD-SCDMA DL beam forming needs the DoA in up link to measure, and therefore, this new channel can be used to provide this information.Except beam forming, feedback channel can also be used to support MIMO or order sectorization (HoS) or other advanced antenna systems.Utilize advanced antennas to save through-put power, P-t-M MBMS users all in community can also be divided into different groups.Therefore, for each group, such as, in a fixed beam, P-t-M MBMS QoS process can be more easy.
Therefore, according at least one example embodiment above-mentioned, between the P-t-P pattern with QoS assessment and the broadcast mode not having QoS to assess, achieve balance.Can realize the QoS of P-t-M MBMS user, new shared channel can be saved limited Radio Resource and utilize.
In addition, above-mentioned example embodiment can help the advanced antennas realized in MBMS network as MIMO, beam forming, HoS and so on, thus the problem that the imbalance between reduction MBMS and non-MBMS network covers, can reduce to cover difference.The advantage of these example embodiment can obtain the easier network planning and optimization, the management of such as Radio Resource.
Disclosed example embodiment provides a kind of user terminal, system, method and computer program product for introducing new channel in MBMS system.Should be appreciated that these descriptions should not limit the present invention.On the contrary, that example embodiment expection covers that the spirit and scope of the present invention that are defined by the following claims comprise is alternative, amendment and equivalents.In addition, in the detailed description of example embodiment, many details have been set forth to provide claimed complete understanding of the present invention.But, it will be understood by those skilled in the art that and do not have these details also can realize various embodiment.
Those skilled in the art can also recognize, in Wireless Telecom Equipment, communication network, example embodiment can be embodied as a kind of method or computer program.Correspondingly, the example embodiment form of embodiment that can take the form of complete hardware embodiment or hardware and software aspect is combined.In addition, example embodiment can take the form of the computer program stored on computer-readable recording medium, and described computer program has the computer-readable instruction realized in media as well.Any suitable computer-readable medium can be utilized, comprise hard disk, CD-ROM, digital versatile disc (DVD), light storage device or magnetic storage apparatus (as floppy disk or tape).Other non-limiting examples of computer-readable medium comprise flash type memory or other known as memory devices.
Generally speaking this example embodiment in user terminal, base station and can realize in the cordless communication network comprising user terminal and base station or system.Example embodiment can also realize in application-specific integrated circuit (ASIC) (ASIC) or digital signal processor.Suitable processor comprises such as: the integrated circuit (IC) of general processor, application specific processor, conventional processors, digital signal processor (DSP), multi-microprocessor, the one or more microprocessors be associated with DSP kernel, controller, microcontroller, application-specific integrated circuit (ASIC) (ASIC), field programmable gate array (FPGA) circuit, any type and/or state machine.The processor be associated with software can be used to realize the radio frequency transceiver used in user terminal, base station or any host computer.User terminal can be used to combine with the module of hardware and/or software simulating, as video camera, video camera module, visual telephone, speaker-phone, vibratory equipment, loud speaker, microphone, television transceiver, Earphone with microphone, keyboard, bluetooth module, frequency modulation (FM) radio unit, liquid crystal display (LCD) display unit, Organic Light Emitting Diode (OLED) display unit, digital music player, media player, video game machine module, explorer and/or any WLAN (wireless local area network) (WLAN) module.
Although describe the characteristic sum element of this example embodiment in an embodiment in the mode of particular combination, but can be used alone each feature or element and do not use other features in embodiment or element, or use each feature or element in the various combinations or do not have with other characteristic sum elements disclosed herein.The method provided in the application or flow chart can computer program, software or firmware with tangible realization in a computer-readable storage medium, by all-purpose computer or processor execution realize.
Claims (15)
1. accept a method for the uplink channel from multiple user terminal to base station for point-to-multipoint P-t-M multicast broadcast multimedia service MBMS transmission pattern, described base station is the multiple subscriber terminal service in communication network, and described method comprises:
Set up (700) from base station to the down link MBMS channel MTCH of multiple user terminal;
In P-t-M pattern, via MTCH channel, send (702) first data from base station, wherein, data are pushed to multiple user terminal from base station by P-t-M pattern;
It is characterized in that:
Via up link MBMS feedback channel MFCH, (704) message is received from multiple user terminal, wherein, the one or more codes distributed in usable radio resources in MFCH in a uplink time slot are used for receipt message, and whether the first data that described message instruction sends from base station are successfully decoded at multiple user terminal; And
Judge that (706) will send the second data from base station to multiple user terminal and still retransmit the first data based on received message;
Wherein, judgement will send the second data and comprises:
The number of users N of assessment instruction to the unsuccessful decoding of the first sent data; And
When N is less than predetermined threshold, judgement will send the second data,
Wherein, except one of ACK or NACK instruction, described message also comprises the information of carrying out beam forming for being supported in base station, wherein beam forming relates to expectation physical location transmitted wave being concentrated to user terminal, or described message also comprises the information of the current radio link quality about each user terminal in multiple user terminal.
2. method according to claim 1, wherein, MTCH channel is the standard channel in MBMS, and MFCH channel is not the standard channel in MBMS.
3. method according to claim 1, wherein, sends the first data and comprises:
The first data are sent to each in multiple user terminal in identical time slot.
4. method according to claim 1, wherein, reception comprises:
Corresponding feedback message is received from each multiple user terminal.
5. a base station, be configured to the uplink channel accepting from multiple user terminal to base station for point-to-multipoint P-t-M multicast broadcast multimedia service MBMS transmission pattern, described base station is the multiple subscriber terminal service in communication network, and described base station comprises:
Processor (30), is configured to set up from base station to the down link MBMS channel MTCH of multiple user terminal;
Transceiver (38), be connected to processor (30), be configured in P-t-M pattern, the first data are sent via MTCH channel, wherein, data are pushed to multiple user terminal from base station by P-t-M pattern, it is characterized in that, via MBMS feedback channel MFCH, from multiple user terminal receipt message, wherein, the one or more codes distributed in the usable radio resources in MFCH in a uplink time slot are used for receipt message, and whether the data that described message instruction sends from base station are successfully decoded at multiple user terminal; And
Described processor (30) is also configured to: based on received message, and instruction transceiver (38) sends the second data to multiple user terminal and still retransmits the first data;
Wherein, described processor (30) is configured to:
The number of users N of assessment instruction to the unsuccessful decoding of the first sent data; And
When N is less than predetermined threshold, send the second data,
Wherein, except one of ACK or NACK instruction, described message also comprises the information of carrying out beam forming for being supported in base station, wherein beam forming relates to expectation physical location transmitted wave being concentrated to user terminal, or described message also comprises the information of the current radio link quality about each user terminal in multiple user terminal.
6. base station according to claim 5, wherein, MTCH channel is the standard channel in MBMS, and MFCH channel is not the standard channel in MBMS.
7. base station according to claim 5, wherein, described processor is also configured to: transceiver described in instruction sends the first data to each in multiple user terminal in identical time slot.
8. for a multicast broadcast multimedia service MBMS transmission pattern, provide the method for the uplink channel from the user terminal multiple user terminal to base station, described base station is the multiple subscriber terminal service in communication network, and described method comprises:
At user terminal place, in P-t-M pattern, down link MBMS channel MTCH receives (800) first data from base station, and wherein, described first data are pushed to multiple user terminal from base station by P-t-M pattern;
At user terminal place, determine whether (802) described first data are successfully decoded; And
It is characterized in that:
Via up link MBMS feedback channel MFCH, (804) message is sent from user terminal to base station, wherein, the one or more codes distributed in usable radio resources in MFCH in a uplink time slot are used for the message that base station receives user terminal, whether described first data that described message instruction sends from base station are successfully decoded, make described base station can pass through the number of users N of assessment instruction to the unsuccessful decoding of sent described first data, judge will send the second data or retransmit the first data, the second data are sent when N is less than predetermined threshold, otherwise retransmit described first data,
Wherein, except one of ACK or NACK instruction, described message also comprises the information of carrying out beam forming for being supported in base station, wherein beam forming relates to expectation physical location transmitted wave being concentrated to user terminal, or described message also comprises the information of the current radio link quality about user terminal.
9. method according to claim 8, wherein, MTCH channel is the standard channel in MBMS, and MFCH channel is not the standard channel in MBMS.
10. method according to claim 8, also comprises:
At user terminal place, determine that the data received are new transmission or the re-transmission of past data.
11. methods according to claim 8, also comprise:
When the data received are re-transmissions of past data, the data received are added into past data by application additive process.
User terminal in 12. 1 kinds of multiple user terminals, be configured to for multicast broadcast multimedia service MBMS transmission pattern, set up the uplink channel from this user terminal to base station, described base station is the multiple subscriber terminal service in communication network, and described user terminal comprises:
Transceiver (38), is configured in P-t-M pattern, and down link MBMS channel MTCH receives the first data from base station, and wherein, described first data are pushed to multiple user terminal from base station by P-t-M pattern;
Whether processor (30), is connected to transceiver (38), be configured to detect described first data and be successfully decoded; And
It is characterized in that, processor (30) is also configured to instruction transceiver (38) and sends message via up link MBMS feedback channel MFCH to base station, the one or more codes distributed in usable radio resources in MFCH in a uplink time slot are used for the message that base station receives user terminal, wherein, whether described first data that described message instruction sends from base station are successfully decoded at described user terminal, make described base station can pass through the number of users N of assessment instruction to the unsuccessful decoding of sent described first data, judge will send the second data or retransmit the first data, the second data are sent when N is less than predetermined threshold, otherwise retransmit described first data,
Wherein, except one of ACK or NACK instruction, described message also comprises the information of carrying out beam forming for being supported in base station, wherein beam forming relates to expectation physical location transmitted wave being concentrated to described user terminal, or described message also comprises the information of the current radio link quality about described user terminal.
13. user terminals according to claim 12, wherein, MTCH channel is the standard channel in MBMS, and MFCH channel is not the standard channel in MBMS.
14. user terminals according to claim 12, wherein, the data that processor is also configured to determine to receive are new transmission or the re-transmission of past data.
15. user terminals according to claim 12, wherein, processor is also configured to, and when the data received are re-transmissions of past data, the data received are added into past data by application additive process.
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| PCT/SE2008/050639 WO2009145688A1 (en) | 2008-05-30 | 2008-05-30 | Uplink channel for point to multipoint multimedia broadcast and multicast service |
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| CN102170611A (en) * | 2010-02-25 | 2011-08-31 | 中兴通讯股份有限公司 | A management method of business flow |
| CN102291681A (en) * | 2010-06-21 | 2011-12-21 | 中国移动通信集团公司 | Method and equipment for obtaining service receiving state of user side by network side and user terminal |
| GB2493780B (en) * | 2011-08-19 | 2016-04-20 | Sca Ipla Holdings Inc | Telecommunications apparatus and methods |
| US9860174B2 (en) | 2013-08-28 | 2018-01-02 | Qualcomm Incorporated | Methods and apparatus for acknowledgment of multi-user uplink wireless transmissions |
| US20150063190A1 (en) * | 2013-08-28 | 2015-03-05 | Qualcomm Incorporated | Methods and apparatus for multiple user uplink |
| CN104113922A (en) * | 2014-07-29 | 2014-10-22 | 中国科学院上海微系统与信息技术研究所 | Wireless network distribution method |
| WO2016119209A1 (en) * | 2015-01-30 | 2016-08-04 | Qualcomm Incorporated | Ue feedback for point-to-multipoint transmissions |
| CN111641486B (en) * | 2015-02-23 | 2023-06-16 | 瑞典爱立信有限公司 | Technique for allocating pilot signals to user equipment |
| CN106160823B (en) * | 2015-04-03 | 2021-02-05 | 索尼公司 | Apparatus and method for wireless communication |
| TWI620462B (en) * | 2015-04-10 | 2018-04-01 | 財團法人資訊工業策進會 | Single cell point to multi-points network system and data transmission method thereof |
| EP3921963B1 (en) * | 2019-02-08 | 2023-08-23 | Lenovo (Singapore) Pte. Ltd. | Selective retransmission of groupcast data |
| DE102019202725A1 (en) * | 2019-02-28 | 2020-09-03 | Diehl Metering Gmbh | SIGNALING OF A MULTICAST MESSAGE IN UNCOORDINATED NETWORKS |
| KR20210011277A (en) * | 2019-07-22 | 2021-02-01 | 삼성전자주식회사 | Method and apparatus for multicast transmission based on channel feedback |
| US11876635B2 (en) | 2019-12-20 | 2024-01-16 | Qualcomm Incorporated | Selective processing of multicast and broadcast retransmissions |
| WO2021134764A1 (en) * | 2020-01-02 | 2021-07-08 | Oppo广东移动通信有限公司 | Information indication method and apparatus, terminal device, and network device |
| CN115004731A (en) * | 2020-02-07 | 2022-09-02 | 高通股份有限公司 | UE-to-UE communication of different traffic types over one or more unicast links |
| JP2023526075A (en) * | 2020-05-20 | 2023-06-20 | 中興通訊股▲ふん▼有限公司 | Method and device for allocating uplink resources for MBMS uplink feedback information |
| WO2022021339A1 (en) * | 2020-07-31 | 2022-02-03 | Nokia Shanghai Bell Co., Ltd. | Methods, apparatuses, and computer readable media for adjusting coverage of multimedia broadcast multicast service |
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| WO2009145688A1 (en) | 2009-12-03 |
| CN102047699A (en) | 2011-05-04 |
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