CN102047699A - Uplink channel for point to multipoint multimedia broadcast and multicast service - Google Patents
Uplink channel for point to multipoint multimedia broadcast and multicast service Download PDFInfo
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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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/30—Resource management for broadcast services
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 mechanism and the technology of communication network mid point to the uplink communication of multiple spot (P-t-M) multimedia broadcast multicast service (MBMS) that be used for.
Background technology
In the past few years, in wireless access technology, constantly increase for the interest that voice, video and data, services are provided.There is the multiple telecommunication technology that in cellular communication, uses.For mobile communication, the most widely used wireless access technology is a digital cellular.The interest that increases has been shown in 3G (third generation) system.A this 3G system is based on Time Division-Synchronous Code Division Multiple Access and inserts (TD-SCDMA), and this system may be a standard will using in China.
International Telecommunications Union (ITU) adopts a time division duplex (TDD) option of TD-SCDMA as international mobile telecommunication-2000 (IMT-2000).TD-SCDMA is considered to the main TDD version that the Wideband Code Division Multiple Access (WCDMA) access-Frequency Division Duplexing (FDD) (WCDMA-FDD) with 3GPP accompanies.Use the advantage of TDD to be, do not need to use the uplink/downlink frequency spectrum of symmetry, therefore this system's support spectrum utilization and distribution more flexibly, and can be at up link and down link, freely dynamically adjust the number of time slot in the radio frames in the frequency band, so the asymmetrical characteristic of network enabled up link and down link.
The advantage of following technology is adopted in TD-SCDMA system design expection: (1) intelligent antenna technology, promptly can form antenna beam to follow the tracks of each user, and insert (SDMA) as space division multiple access, thereby strengthen link budget; And (2) TDD and code division multiple access access (CDMA), time division multiple access is inserted (TDMA) in the permission system and CDMA combines, make the number of users in each time slot can keep less, so that carry out joint-detection, joint-detection can reduce multiple access and insert interference (MAI), and can alleviate the problem of enhanced system capacity.TD-SCDMA also is the synchro system between a kind of base station and the travelling carriage, and is particularly like this in up link.Therefore, can alleviate the MAI between the user, can increase link budget, thereby increase power system capacity.
TD-SCDMA can support high-speed downlink packet to insert (HSDPA), and HSDPA is based on support channel (being called HS-DSCH, at high-speed downlink shared channel) at the shared high-speed down link that uses when terminal equipment transmits packet.HSDPA has been considered to improve throughput, delay and the spectrum efficiency in the down link (DL).
TD-SCDMA also can support multimedia broadcast multicast service (MBMS) technology.This technology is introduced into the released version 6 and the released version 7 of 3GPP standard.It is based on, and WCDMA and WCDMA HSDPA develop.For WCDMA and flavor thereof, because the Radio Resource restriction, MBMS is expected at WCDMA HSDPA, high-speed packet inserts to add among (HSPA+) and the LTE (Long Term Evolution) and realizes.For example, WCDMA HSDPA provides flow transmission type and high-power carrying, to guarantee service quality (QoS) and to guarantee that the data of broadcasting arrive little area carrier.Can use Modulation and Coding Scheme (MCS) with the extremely different application of different data rate.
Use MBMS, can identical content be sent to a plurality of users that are arranged in appointed area (MBMS service area) in unidirectional mode.The MBMS service area can cover a plurality of sub-districts.Broadcasted with the multicast conceptual description different but situations about being closely related.In broadcasting, can in each sub-district, set up the point-to-multipoint Radio Resource as the part of MBMS broadcast area, all users that subscribe to broadcast service receive identical transmission signal simultaneously.Not to the line trace that moves forward into of user in the wireless access network, the user can received content and is not needed informing network.Mobile TV is the example that the service that provides can be provided by MBMS.
In multicast, be used for request adding multicast group before receiving any data.Can move forward into line trace to the user, can with radio-resource-configuration for each sub-district in number of users be complementary.Each sub-district in the MBMS multicast zone can be configured to point-to-point (P-t-P) or point-to-multipoint transmission.Therefore, multicast allows network that the transport-type in each sub-district is optimized.
For the MBMS service, there is two types air interface mechanism, i.e. P-t-P and P-t-M.In the P-t-P interface, a pair of dedicated channel (up link (UL) and down link (DL)) is used for being connected between each MBMS user and base station.In the P-t-M interface, have only the DL channel to be used for from the base station to MBMS receiver (or MS receiver) propelling movement/broadcast multimedia service, and with exist how many MBMS receivers irrelevant.Even there is not the MBMS receiver, the P-t-M interface also sends multimedia service on the DL channel.Therefore, because the P-t-P interface can keep/handle the QoS of MBMS transmission, the P-t-M interface can not realized the service/performance with P-t-P interface same levels.
In addition, the P-t-M interface is not supported beam shaping, 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 in TD-SCDMA, realizing, the MBMS system is in the face of many challenges, as network coverage balance, time slot change, power division and optimization, number of channelization codes and the proprietary characteristic of some TD-SCDMA, for example N ZAP according to traditional standard (as 3GPP R4 (TD-SCDMA) and R5 (TD-SCDMA HSDPA)).During any MBMS in the TD-SCDMA system realizes, consider that above-mentioned advanced will be favourable.
China's Telecommunication's ANSI (CCSA) has been issued the first version of TD-SCDMA MBMS standard, wherein, has fixed with time slot networking (UTN) and broadcasting.Yet this is to have much room for improvement to comprise the MBMS (MBSFN) that for example has single frequency network and the released version of multicast.
Correspondingly, communication provides equipment, the system and method for avoiding the problems referred to above and defective at voice and video in expectation.
Summary of the invention
According to example embodiment, exist and a kind ofly accept the method for the uplink channel from a plurality of user terminals to the base station at point-to-multipoint (P-t-M) multimedia broadcast multicast service (MBMS) transmission mode, described base station is a plurality of subscriber terminal service in the communication network.Described method comprises: set up from the base station to the down link MBMS Traffic Channel (MTCH) of a plurality of user terminals; In the P-t-M pattern, via the MTCH channel, send first data from the base station, wherein, the P-t-M pattern pushes to a plurality of user terminals with data from the base station; Via up link MBMS feedback channel (MFCH), receive message from a plurality of user terminals, wherein, whether first data that described message indication sends from the base station are successfully decoded at a plurality of user terminals; And judge that based on the message that is received send second data to a plurality of user terminals from the base station still retransmits first data.
According to another example embodiment, there is a kind of computer-readable medium, comprise computer-readable instruction, wherein, when carrying out by the processor of base station, described instruction makes the base station accept uplink channel from a plurality of user terminals to the base station at point-to-multipoint (P-t-M) multimedia broadcast multicast service (MBMS) transmission mode, and described base station is a plurality of subscriber terminal service in the communication network.Described instruction comprises: set up from the base station to the down link MBMS Traffic Channel (MTCH) of a plurality of user terminals; In the P-t-M pattern, via the MTCH channel, send first data from the base station, wherein, the P-t-M pattern pushes to a plurality of user terminals with data from the base station; Via up link MBMS feedback channel (MFCH), receive message from a plurality of user terminals, wherein, whether first data that described message indication sends from the base station are successfully decoded at a plurality of user terminals; And judge that based on the message that is received send second data to a plurality of user terminals from the base station still retransmits first data.
According to another example embodiment, there is a kind of base station, be configured to accept uplink channel from a plurality of user terminals to the base station at point-to-multipoint (P-t-M) multimedia broadcast multicast service (MBMS) transmission mode, described base station is a plurality of subscriber terminal service in the communication network.Described base station comprises: processor is configured to set up from the base station to the down link MBMS Traffic Channel (MTCH) of a plurality of user terminals; Transceiver, be connected to processor, be configured in the P-t-M pattern, send first data via the MTCH channel, wherein, the P-t-M pattern pushes to a plurality of user terminals with data from the base station, described transceiver also is configured to via MBMS feedback channel (MFCH), receive message from a plurality of user terminals, wherein, whether the data that described message indication sends from the base station are successfully decoded at a plurality of user terminals; And described processor also is configured to: based on the message that is received, the indication transceiver sends second data or retransmits first data to a plurality of user terminals.
According to another embodiment, exist a kind ofly at multimedia broadcast multicast service (MBMS) transmission mode, provide user terminal from a plurality of user terminals to the method for the uplink channel of base station, described base station is a plurality of subscriber terminal service in the communication network.Described method comprises: at the user terminal place, in the P-t-M pattern, go up from base station reception data in down link MBMS Traffic Channel (MTCH), wherein, the P-t-M pattern pushes to a plurality of user terminals with data from the base station; At the user terminal place, whether specified data is successfully decoded; And, send message to the base station from user terminal via up link MBMS feedback channel (MFCH), wherein, whether the data that described message indication sends from the base station are successfully decoded.
According to another embodiment, a kind of computer-readable medium is provided, comprise computer-readable program, wherein, when carrying out by the processor of the user terminal in a plurality of user terminals, described instruction makes user's terminal pins to multimedia broadcast multicast service (MBMS) transmission mode, sets up the uplink channel from user terminal to the base station, and described base station is a plurality of subscriber terminal service in the communication network.Described instruction comprises: at the user terminal place, in the P-t-M pattern, go up from base station reception data in down link MBMS Traffic Channel (MTCH), wherein, the P-t-M pattern pushes to a plurality of user terminals with data from the base station; At the user terminal place, whether specified data is successfully decoded; And, send message to the base station from user terminal via up link MBMS feedback channel (MFCH), wherein, whether the data that described message indication sends from the base station are successfully decoded.
According to example embodiment, provide the user terminal in a plurality of user terminals; Be configured at multimedia broadcast multicast service (MBMS) transmission mode, set up the uplink channel from user terminal to the base station, described base station is a plurality of subscriber terminal service in the communication network.Described user terminal comprises: transceiver, be configured in the P-t-M pattern, and go up from the base station in down link MBMS Traffic Channel (MTCH) and receive data, wherein, the P-t-M pattern pushes to a plurality of user terminals with data from the base station; Whether processor is connected to transceiver, be configured to detect data and successfully decoded; And processor also is configured to indicate transceiver to send message via up link MBMS feedback channel (MFCH) to the base station, and wherein, whether the data that described message indication sends from the base station are successfully decoded at user terminal.
Abbreviated list
P-t-P is point-to-point
The P-t-M point-to-multipoint
The service of MBMS multimedia broadcast multicast
MS multicast service
TD?MBMS?TD-SCDMA?MBMS
The TD-SCDMA Time Division-Synchronous Code Division Multiple Access inserts
3GPP third generation partner program
The AoA angle of arrival
UTN is with the time slot networking
MBSFN has the MBMS of single frequency network
The HSDPA high-speed downlink packet inserts
The HSUPA High Speed Uplink Packet inserts
The HSPA high-speed packet inserts
The EUL enhanced uplink
CCSA China's Telecommunication ANSI
QoS service quality
The UL up link
The DL down link
LTE (the 3G system) Long Term Evolution
The RNC radio network controller
The MSC Modulation and Coding Scheme
The HoS higher order sectorizationization
MTCH MBMS Traffic Channel
MCCH MBMS control channel
MICH MBMS indicating channel
MFCH MBMS feedback channel
The FDD Frequency Division Duplexing (FDD)
The TDD time division duplex
The FACH forward access channel
The RACH Random Access Channel
The SCCPCH Secondary Common Control Physical Channel
The PRACH Physical Random Access Channel
RANAP Radio Access Network application protocol
The CN core net
The GPRS general packet radio service
The GSN GPRS Support Node
The GGSN Gateway GPRS Support Node
The SGSN Serving GPRS Support Node
The RAN wireless access network
NBAP Node B application protocol
The TTI Transmission Time Interval
CC Chase merges
The IR incremental redundancy
The DoA angle of arrival
The MIMO multiple-input and multiple-output
The HoS higher order sectorizationization
The UTRAN universal land radio access web
Description of drawings
In conjunction with the accompanying drawings and constitute the part of specification, illustrate one or more embodiment, and explain these embodiment with describing.In the accompanying drawing:
Fig. 1 is the schematic diagram of communication network;
Fig. 2 is according to the base station of example embodiment and/or the schematic diagram of user terminal;
Fig. 3 has illustrated the schematic diagram of the various channels that use in the MBMS system;
Fig. 4 has illustrated schematic diagram according to the new uplink channel in the MBMS system of example embodiment;
Fig. 5 has illustrated the schematic diagram of the signal that exchanges according to example embodiment between each assembly of communication system;
Fig. 6 has illustrated the flow chart of the step carried out according to example embodiment communication system during the MBMS session;
Fig. 7 has illustrated according to the flow chart of example embodiment in the step of MBMS session base stations during execution; And
Fig. 8 has illustrated the flow chart of the step carried out according to example embodiment user terminal during the MBMS session.
Embodiment
The following description of example embodiment is carried out with reference to accompanying drawing.In different figure, identical reference number identifies same or analogous element.Below describe in detail and do not limit the present invention.The ground that replaces, scope of the present invention is limited by claims.For simplicity, about the term and the structure of above-mentioned TD-SCDMA system following examples are discussed.Yet next the embodiment that will discuss is not limited to these systems, but can be applied to other existing telecommunication system, for example WCDMA or the like.In addition, although the term that is exclusively used in the TD-SCDMA system is used in following description, use term base station, terminal equipment, wireless control network in general sense.For example, 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 or the like.
Run through specification, " embodiment " or quoting of " embodiment " are meaned that the special characteristic of describing in conjunction with the embodiments, structure or characteristic comprise at least one embodiment of the present invention.Therefore, running through phrase " in one embodiment " or " in an embodiment " that specification occurs everywhere must all not refer to identical embodiment.In addition, in one or more embodiments, can make up special characteristic, structure or characteristic in any suitable manner.
As shown in Figure 1, according to example embodiment, general telecommunication system 10 can comprise the user terminal (UE) 12 that is connected to NodeB 14 via communication link 16.NodeB 14 can be connected to radio network controller (RNC) 18 via interface 20 (for example S 1 interface).More than can form wireless access network (RAN) 22 about the element that Fig. 1 discussed.RAN 22 is connected to communication network (CN) 24, and CN 24 can comprise Serving GPRS Support Node (SGSN) 26, mobile management entity (MME) 28 and Public Switched Telephone Network (PSTN) 29.
Next, the structure of MBMS is discussed, and is explained the new feature that adds this system.For simply, the structure of MBMS system is discussed, but new example embodiment also is applicable to the MS system.The multiple physical channel that exists MSMS to use: MTCH (MBMS Traffic Channel), MCCH (MBMS control channel) and MICH (MBMS indicating channel).These channels are downlink channel shown in Figure 3.MCCH and MICH channel use the FACH channel as transmission channel, use the 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, added new channel.This new channel is called MFCH (MBMS feedback channel).In FDD and tdd mode, the P-t-M interface among the MBMS can use this channel.This channel can be shared by among the P-t-M MBMS user some or all, for example shares by time-multiplexed mode in the up link.The MFCH channel is a kind of uplink channel, and terminal can use this channel to provide feedback to not relevant with MBMS system (being specially the P-t-M multicast system) base station.
How integrated in order to understand this channel better with other channels, next consider sample situation.According to example embodiment, the user has two kinds of methods to provide feedback in the mode of avoiding conflicting between the user to the base station.A kind of method is with special time each user to be dispatched, to provide feedback to the base station.For example, can on MCCH or MICH channel, indicate dispatching command.Second method is when not provide feedback to dispatch to the base station to the user, but allows the user to carry out blind feedback in fixing or flexible time section.This time period can be depended on the number that receives the user.A plurality of users 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 to be used for feedback (one or more sign indicating numbers of a uplink time slot), and then, Node B knows which feedback bits belongs to each user.Another kind method is, in the multicast pattern, feeds back in same channel (radio resource unit), wherein the proprietary sign of UE carried out scrambling.Then, NodeB knows the UE ID in each multicast group, and NodeB uses the proprietary ID matched filter of UE, separates information from each user based on the overlapped signal that receives in the channel.
With sending which kind of content in this channel, how sharing this channel between the user, how to carry out relevant QoS control and which kind of time period can be that the detail that suitable feedback time section is correlated with can change according to realization.Yet, next this may a realization is discussed.According to example embodiment, whether successful the content among the MFCH can comprise last time transmission indication, indicate the parameter (as the feedback among the HSDPA) of current wireless link-quality or channel quality information (CQI) and/or can be happy bit (happy bit) (as the feedback among the HSPUA/EUL).Based on method discussed above, in time domain, the mode of sharing UL between each user can be varied.For example, can or retransmit or increase/reduce through-put power or other technologies based on tuning transmission block size and carry out the feedback that being used to from user terminal to the base station indicate QoS.In an example embodiment, the QoS relevant parameter can be identical for all the P-t-M MS users in the group (for the unit of P-t-M multicast).The time period of feedback can be fixed, and is identical for all P-t-M users; Or variable, for each P-t-M user's difference.
In example embodiment, the channel that Fig. 5 shows the step of carrying out in the MS session and session is used to send signal at MS.To this, notice that example embodiment described herein is suitable for MS and MBMS session.For simply, next the MBMS session is described.Fig. 5 shows user terminal 12, Node B 14, RNC 18 and core net (CN) 50.CN 50 comes the 18 transmission signals to RNC by using again authentication request (RAR) and authenticating answer (RAA) again, thus beginning MBMS session in step 52.In step 54, RNC 18 sends corresponding MBMS commencing signal to Node B 14.In step 56, RNC 18 initiates transmission channels at Node B 14 and sets up, and sends MCCH and MICH channel to initiate the 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 map to physical channel SCCPCH user terminal 12 in step 62.According to example embodiment, introduce new step 64 (make among Fig. 5 and be shown in broken lines) and realize from user terminal 12 to Node B 14 and/or to the feedback of RNC18.In step 64, use new logic channel MFCH to carry out feedback, MFCH is mapped to transmission channel RACH, and RACH further is mapped to physical channel PRACH in step 68, 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 whether transmission is correctly received, whether current propagation can be accepted and/or some other scheduled transmission forms to indicate.Content depends on actual RAN design and application service.Step 68,70,72 and 74 and above-mentioned steps 60,62,64 and 66 similar, and these steps are can be in step 64 and 66 indication transmission unsuccessful for some reason and carry out can carry out the re-transmission of initial data the time.
In fact, can be in NodeB predefine related algorithm or method, to retransmit judgement based on these message.To this, according to example embodiment, when NodeB receives " N " individual feedback from amounting to " M " individual P-t-M multicast MBMS user (wherein N is less than or equal to M), NodeB can judge the signal that retransmits last time.If N is less, then NodeB can judge not re-transmitted signal.Yet if N is bigger, NodeB can judge this signal of re-transmission.The threshold value of N is definite by Virtual network operator, and can depend on number and other network-related parameters of user, perhaps can dynamic calculation.For example, if N less than M/2, does not then retransmit.If N is more than or equal to M/2, then NodeB judges the signal that retransmits last time.Yet in this example embodiment, the QoS relative parameters setting that receives user's group of same signal is identical for each user in the group.
According to example embodiment, can come general processor is programmed based on the step of describing about Fig. 6, to be implemented in the new feedback channel of describing in one of above-mentioned example embodiment.In step 600, beginning MBMS session, and between CN 50 and universal land radio access web (UTRAN), on Node B applying portion (NBAP), set up transmission channel.In step 602, send the MBMS data to user terminal 12 along channel MTCH/FACH/SCCPCH from Node B 14.Distribution and indication based on MCCH and the appointment of MICH channel come the MBMS transmission data.
User terminal received the MBMS subpackage in subframe or Transmission Time Interval (TTI) after, user terminal was determined to be new transmission or to retransmit from the transmission of base station in step 604.Receive new transmission if determine the result, then user terminal determines whether to decode in step 606 and newly transmits.If the result in the step 604 receives re-transmission, then in step 608, user terminal can use additive process that information that retransmits and the subpackage that has received are merged.For example, user terminal can use Chase merging (CC) or incremental redundancy (IR) process as additive process.After execution in step 608, method advances to step 606.
Determining in the step 606 can for example be checked the designator newly/again among the MICH based on different designs, perhaps by using additivity transmission block numbering.When step 606 was determined to decode the subpackage that receives, in step 610, user terminal can produce ACK or NACK order based on reception result.This order and other information, for example channel status can feed back to the base station.In step 612, this information can send it back the 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 cooperation is that example presents, and is not intended to restriction the present invention.
When the base station on the new channel when user terminal receives above-mentioned MBMS feedback subpackage, the base station determines that this order is ACK or NACK.If the order that receives is ACK, then in step 614, the base station judges that all users have successfully received transmission last time, and in step 616, source data is deleted in the base station from its buffer.Yet if the order that receives is NACK, in step 618, the base station determines that one or more user terminals successfully do not receive transmission last time.Then, the base station judges whether retransmit the MBMS data.For this situation, the base station at first determines in step 618 whether the re-transmission time arrives the predetermined threshold that can accept the time of retransmitting.If then in step 620, the MBMS data transmission fails is determined in the base station, method advances to step 616.Otherwise in step 622, plan retransmits, and method is returned step 602.In definite transmission success or owing to after time lapse, condition determined that transmission has been failed,, can delete the original MBMS data of preserving in the buffer of Node-B in step 616.
According to example embodiment shown in Figure 7, the processor of base station can be programmed or be configured to accept at P-t-M MBMS transmission mode the method for the uplink channel from a plurality of user terminals to the base station, and described base station is a plurality of subscriber terminal service in the communication network.Described method comprises: in step 700, set up from the base station to the down link MBMS Traffic Channel (MTCH) of a plurality of user terminals; In step 702, in the P-t-M pattern,, send first data from the base station via the MTCH channel, wherein, the P-t-M pattern pushes to a plurality of user terminals with data from the base station; In step 704, via up link MBMS feedback channel (MFCH), receive message from a plurality of user terminals, wherein, whether first data that described message indication sends from the base station are successfully decoded at a plurality of user terminals; And, judge that based on the message that is received send second data to a plurality of user terminals from the base station still retransmits first data in step 706.
According to example embodiment shown in Figure 8, the processor of user terminal can be programmed or be configured at multimedia broadcast multicast service (MBMS) transmission mode, provide user terminal from a plurality of user terminals to the method for the uplink channel of base station, described base station is a plurality of subscriber terminal service in the communication network.Described method comprises: in step 800, at the user terminal place, in the P-t-M pattern, go up from base station reception data in down link MBMS Traffic Channel (MTCH), wherein, the P-t-M pattern pushes to a plurality of user terminals with data from the base station; In step 802, at the user terminal place, whether specified data is successfully decoded; And,, send message to the base station from user terminal via up link MBMS feedback channel (MFCH) in step 804, wherein, whether the data that described message indication sends from the base station are successfully decoded.
Said method can be used for FDD and TDD MBMS system, can also be used to have the FDD and the TDD MBMS system of advanced antennas.To this, have the FDD of advanced antennas and TDD MBMS system and send 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, realized gain owing to introducing advanced antennas, but these systems send the MBMS data with broadcast mode.Therefore, have the system of advanced antennas, exist the imbalance between the different services to cover, because do not provide support to MIMO or beam forming technique at the uplink feedback of MBMS transfer of data for these.By introduce above-mentioned feeding back uplink link channel in the MBMS system, this channel can provide advanced antennas to realize the required other information of beam shaping, and therefore, advanced antennas also can serve work at MBMS.Therefore, can reduce uneven covering problem.
For TD-SCDMA, this new channel can also provide use the support of the smart antenna solutions of R4 and R5 in TD MBMS network.TD-SCDMA DL beam shaping needs the DoA in the up link to measure, and therefore, can use this new channel that this information is provided.Except beam shaping, can also use feedback channel to support MIMO or higher order sectorizationization (HoS) or other advanced antenna systems.Utilize the advanced antennas can conserve transmission power, all P-t-M MBMS users in the sub-district can also be divided into different groups.Therefore, for each group, for example in a fixed beam, P-t-M MBMS QoS handles can be more easy.
Therefore, according to above-mentioned at least one example embodiment, between the P-t-P pattern with QoS assessment and the broadcast mode that does not have QoS to assess, realized balance.Can realize P-t-M MBMS user's QoS, new shared channel can be saved the finite wireless resources utilization.
In addition, above-mentioned example embodiment can help in the MBMS network to realize as the advanced antennas of MIMO, beam shaping, HoS and so on, thereby reduces the problem of the imbalance covering between MBMS and the non-MBMS network, can reduce to cover difference.The advantage of these example embodiment can obtain the easier network planning and optimization, for example the management of Radio Resource.
Disclosed example embodiment provides a kind of user terminal, system, method and computer program product that is used for introducing in the MBMS system new channel.Should be appreciated that these descriptions should not limit the present invention.On the contrary, example embodiment expection covers comprise in the spirit and scope of the present invention that are defined by the following claims alternative, modification and equivalents.In addition, in the detailed description of example embodiment, many details have been set forth to provide to claimed complete understanding of the present invention.Yet it will be understood by those skilled in the art that does not have these details can realize various embodiment yet.
Those skilled in the art can also recognize, can be in Wireless Telecom Equipment, communication network example embodiment be embodied as a kind of method or computer program.Correspondingly, example embodiment can be taked the form of complete hardware embodiment or with the form of the embodiment of hardware and software aspect combination.In addition, example embodiment can be taked the form of the computer program stored on computer-readable recording medium, and described computer program has the computer-readable instruction of realizing in medium.Any suitable computer-readable medium be can utilize, hard disk, CD-ROM, digital versatile disc (DVD), light storage device or magnetic storage apparatus (as floppy disk or tape) comprised.Other non-limiting examples of computer-readable medium comprise flash type memory or other known as memory devices.
This example embodiment can user terminal, base station and generally speaking comprising the cordless communication network of user terminal and base station or system in realize.Example embodiment can also realize in application-specific integrated circuit (ASIC) (ASIC) or digital signal processor.Suitable processor for example comprises: the integrated circuit (IC) and/or the state machine of general processor, application specific processor, conventional processors, digital signal processor (DSP), a plurality of microprocessor, the one or more microprocessors that are associated with the DSP kernel, controller, microcontroller, application-specific integrated circuit (ASIC) (ASIC), field programmable gate array (FPGA) circuit, any kind.Can use the processor that is associated with software to be implemented in the radio frequency transceiver that uses in user terminal, base station or any host computer.Can use user terminal to combine, as video camera, video camera module, visual telephone, speaker-phone, vibratory equipment, loud speaker, microphone, TV transceiver, Earphone with microphone, keyboard, bluetooth module, frequency modulation (FM) radio unit, LCD (LCD) display unit, Organic Light Emitting Diode (OLED) display unit, digital music player, media player, video game machine module, explorer and/or any wireless lan (wlan) module with the module that realizes with hardware and/or software.
Although described the feature and the element of this example embodiment in an embodiment in the mode of particular combinations, but can use each feature or element separately and not use other features or element among the embodiment, perhaps in the various combinations that have or do not have other features disclosed herein and element, use each feature or element.Method that provides among the application or flow chart can be realized with the computer program, software or the firmware that tangiblely are implemented in the computer-readable recording medium, carried out by all-purpose computer or processor.
Claims (30)
1. accept the method for the uplink channel from a plurality of user terminals to the base station at point-to-multipoint P-t-M multimedia broadcast multicast service MBMS transmission mode for one kind, described base station is a plurality of subscriber terminal service in the communication network, and described method comprises:
Set up (700) from the base station down link MBMS Traffic Channel MTCH to a plurality of user terminals;
In the P-t-M pattern, via the MTCH channel, send (702) first data from the base station, wherein, the P-t-M pattern pushes to a plurality of user terminals with data from the base station;
It is characterized in that:
Via up link MBMS feedback channel MFCH, receive (704) message from a plurality of user terminals, wherein, whether first data that described message indication sends from the base station are successfully decoded at a plurality of user terminals; And
Judge that based on the message that is received (706) will send second data to a plurality of user terminals from the base station and still retransmit first data.
2. method according to claim 1, wherein, the MTCH channel is the standard channel among the MBMS, the MFCH channel is not the standard channel among the MBMS.
3. method according to claim 1 wherein, sends first data and comprises:
In identical time slot in a plurality of user terminals each sends first data.
4. method according to claim 1, wherein, reception comprises:
From a plurality of user terminals each receives corresponding feedback message.
5. method according to claim 1, wherein, except one of ACK or NACK indication, described message also comprises and is used to be supported in the information that the place, base station carries out beam shaping, wherein beam shaping relates to the expectation physical location that transmitted wave is concentrated to user terminal, and perhaps described message also comprises the information about the current wireless link-quality of each user terminal in a plurality of user terminals.
6. method according to claim 1, wherein, judgement will send second data and comprise:
The number of users N to the unsuccessful decoding of first data that sent is indicated in assessment; And
As N during less than predetermined threshold, judgement will send second data.
7. computer-readable medium, comprise computer-readable instruction, wherein, when carrying out by the processor of base station, described instruction makes the base station accept uplink channel from a plurality of user terminals to the base station at point-to-multipoint P-t-M multimedia broadcast multicast service MBMS transmission mode, described base station is a plurality of subscriber terminal service in the communication network, and described instruction comprises:
Set up (700) from the base station down link MBMS Traffic Channel MTCH to a plurality of user terminals;
In the P-t-M pattern, via the MTCH channel, send (702) first data from the base station, wherein, the P-t-M pattern pushes to a plurality of user terminals with data from the base station;
It is characterized in that:
Via up link MBMS feedback channel MFCH, receive (704) message from a plurality of user terminals, wherein, whether first data that described message indication sends from the base station are successfully decoded at a plurality of user terminals; And
Judge that based on the message that is received (706) will send second data to a plurality of user terminals from the base station and still retransmit first data.
8. medium according to claim 7, wherein, the MTCH channel is the standard channel among the MBMS, the MFCH channel is not the standard channel among the MBMS.
9. medium according to claim 7 wherein, sends first data and comprises:
In identical time slot in a plurality of user terminals each sends first data.
10. medium according to claim 7, wherein, reception comprises:
From a plurality of user terminals each receives corresponding feedback message.
11. medium according to claim 7, wherein, except one of ACK or NACK indication, described message also comprises and is used to be supported in the information that the place, base station carries out beam shaping, wherein beam shaping relates to the expectation physical location that transmitted wave is concentrated to user terminal, and perhaps described message also comprises the information about the current wireless link-quality of each user terminal in a plurality of user terminals.
12. medium according to claim 7, wherein, judgement will send second data and comprise:
The number of users N to the unsuccessful decoding of first data that sent is indicated in assessment; And
As N during less than predetermined threshold, judgement will send second data.
13. base station, be configured to accept uplink channel from a plurality of user terminals to the base station at point-to-multipoint P-t-M multimedia broadcast multicast service MBMS transmission mode, described base station is a plurality of subscriber terminal service in the communication network, and described base station comprises:
Processor (30) is configured to set up from the base station to the down link MBMS Traffic Channel MTCH of a plurality of user terminals;
Transceiver (38), be connected to processor (30), be configured in the P-t-M pattern, send first data via the MTCH channel, wherein, the P-t-M pattern pushes to a plurality of user terminals with data from the base station, it is characterized in that,, receive message from a plurality of user terminals via MBMS feedback channel MFCH, wherein, whether described message indication is successfully decoded at a plurality of user terminals from the data of base station transmission; And
Described processor (30) also is configured to: based on the message that is received, indication transceiver (38) sends second data to a plurality of user terminals and still retransmits first data.
14. base station according to claim 13, wherein, the MTCH channel is the standard channel among the MBMS, and the MFCH channel is not the standard channel among the MBMS.
15. base station according to claim 13, wherein, described processor also is configured to: instruct described transceiver each in a plurality of user terminals in identical time slot to send first data.
16. one kind at multimedia broadcast multicast service MBMS transmission mode, provides user terminal from a plurality of user terminals to the method for the uplink channel of base station, described base station is a plurality of subscriber terminal service in the communication network, and described method comprises:
At the user terminal place, in the P-t-M pattern, on down link MBMS Traffic Channel MTCH, receive (800) data from the base station, wherein, the P-t-M pattern pushes to a plurality of user terminals with data from the base station;
At the user terminal place, determine whether (802) data are successfully decoded; And
It is characterized in that:
Via up link MBMS feedback channel MFCH, send (804) message from user terminal to the base station, wherein, whether the data that described message indication sends from the base station are successfully decoded.
17. method according to claim 16, wherein, the MTCH channel is the standard channel among the MBMS, and the MFCH channel is not the standard channel among the MBMS.
18. method according to claim 16, wherein, except one of ACK or NACK indication, described message also comprises and is used to be supported in the information that the place, base station carries out beam shaping, wherein beam shaping relates to the expectation physical location that transmitted wave is concentrated to user terminal, and perhaps described message also comprises the information about the current wireless link-quality of user terminal.
19. method according to claim 16 also comprises:
At the user terminal place, determine that the data that receive are the new transmission or the re-transmission of past data.
20. method according to claim 16 also comprises:
When the data that receive are the re-transmission of past data, use additive process the data that receive are added into past data.
21. computer-readable medium, comprise computer-readable program, wherein, when carrying out by the processor of the user terminal in a plurality of user terminals, described instruction makes this user terminal at multimedia broadcast multicast service MBMS transmission mode, the uplink channel of foundation from this user terminal to the base station, described base station are a plurality of subscriber terminal service in the communication network, and described instruction comprises:
At this user terminal place, in the P-t-M pattern, on down link MBMS Traffic Channel MTCH, receive (800) data from the base station, wherein, the P-t-M pattern pushes to a plurality of user terminals with data from the base station;
At this user terminal place, determine whether (802) data are successfully decoded; And
It is characterized in that:
Via up link MBMS feedback channel MFCH, send (804) message from this user terminal to the base station, wherein, whether the data that described message indication sends from the base station are successfully decoded.
22. medium according to claim 21, wherein, the MTCH channel is the standard channel among the MBMS, and the MFCH channel is not the standard channel among the MBMS.
23. medium according to claim 21, wherein, except one of ACK or NACK indication, described message also comprises and is used to be supported in the information that the place, base station carries out beam shaping, wherein beam shaping relates to the expectation physical location that transmitted wave is concentrated to this user terminal, and perhaps described message also comprises the information about the current wireless link-quality of this user terminal.
24. medium according to claim 21 also comprises:
At this user terminal place, determine that the data that receive are the new transmission or the re-transmission of past data.
25. medium according to claim 21 also comprises:
When the data that receive are the re-transmission of past data, use additive process the data that receive are added into past data.
26. the user terminal in a plurality of user terminals; Be configured at multimedia broadcast multicast service MBMS transmission mode, set up the uplink channel from this user terminal to the base station, described base station is a plurality of subscriber terminal service in the communication network, and described user terminal comprises:
Transceiver (38) is configured in the P-t-M pattern, receives data from the base station on down link MBMS Traffic Channel MTCH, and wherein, the P-t-M pattern pushes to a plurality of user terminals with data from the base station;
Whether processor (30) is connected to transceiver (38), be configured to detect data and successfully decoded; And
It is characterized in that processor (30) also is configured to indicate transceiver (38) to send message via up link MBMS feedback channel MFCH to the base station, wherein, whether the data that described message indication sends from the base station are successfully decoded at described user terminal.
27. user terminal according to claim 26, wherein, the MTCH channel is the standard channel among the MBMS, and the MFCH channel is not the standard channel among the MBMS.
28. user terminal according to claim 26, wherein, except one of ACK or NACK indication, described message also comprises and is used to be supported in the information that the place, base station carries out beam shaping, wherein beam shaping relates to the expectation physical location that transmitted wave is concentrated to described user terminal, and perhaps described message also comprises the information about the current wireless link-quality of described user terminal.
29. user terminal according to claim 26, wherein, processor is configured to also determine that the data that receive are the new transmission or the re-transmission of past data.
30. user terminal according to claim 26, wherein, processor also is configured to, and when the data that receive are the re-transmission of past data, use additive process the data that receive are added into past data.
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| Publication number | Publication date |
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| CN102047699B (en) | 2015-05-13 |
| WO2009145688A1 (en) | 2009-12-03 |
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