CN102823278A - Transmission of multicast broadcast service (Mbs) traffic in a wireless environment - Google Patents

Abstract

Multicast broadcast service (MBS) transmission in a multiple-input-multiple- output (MIMO) communication being transmitted using one of three modes, a single-layer mode, a spatial multiplexing (SM) mode and a hierarchical mode. In the hierarchical mode, lower quality data is transmitted over a first MIMO layer and enhancement data is transmitted over a second MIMO layer. A receiving device may only successfully receive the lower quality data or may successfully receive the enhancement data to enhance it with. The transmission scheme used, including the mode used, may be selectable, and may be selected based on feedback.

Description

The transmission of the multicast and broadcast service (MBS) in the wireless environment

The cross reference of related application

The priority of the U.S. Provisional Patent Application that the application requires to submit on September 2nd, 2009 number 61/239,239 is quoted through integral body it is incorporated into this.

The application is the U.S. Provisional Patent Application submitted on September 2nd, 2009 number 61/239; 239 transform the part continuation application of the non-provisional application (series number is undetermined) obtain according to 37 C.F.R. § 1.53 (c) (3); The priority of the U.S. Provisional Patent Application that this U.S. Provisional Patent Application requires on September 5th, 2008 was submitted to number 61/094,562.

Technical field

The application relates generally to wireless communication technology and relates more specifically to use the symbol transmission in the MIMO scheme of Alamouti sign indicating number.

Background technology

Increase wherein coming the demand of the service of delivering data to increase in recent years and being expected to continue via wireless connections.Comprise following application, in these are used via perhaps high definition TV (HDTV) delivering data of cellular mobile telephone or other mobile phones, PCS Personal Communications System (PCS) and numeral.Although the demand of these services is being increased, it is limited to be used for the channel width of delivering data.Therefore hope to pass through these finite bandwidth high speed delivery data with efficient and cost effective manner.

It is a kind of that to be used for through the known way that channel is efficiently sent high-speed data be through using OFDM (OFDM).High-speed data signal is divided into tens of or hundreds of the signals than low velocity through the corresponding frequencies parallel transmission that is called sub-carrier frequencies (" subcarrier ") in radio frequency (RF) signal.The spectrum overlapping of subcarrier makes to minimize the spacing between them.Subcarrier is also mutually orthogonal, makes them on statistics, independently and produce and crosstalks or otherwise phase mutual interference.Thereby than the much efficient channel width of using in conventional single carrier transmission scheme (such as AM/FM (amplitude modulation or frequency modulation)).

Space time transmit diversity (STTD) can realize that the symbol level that obviously improves link performance divides collection.Therefore the STTD code is realized being regarded as " perfection " on full Space Time Coding speed (Space Time Coding speed=1 is also referred to as speed-1) and it are for the meaning of quadrature at it.Yet when transmit antenna quantity more than 2 the time, speed-1 orthogonal code does not exist.

A kind ofly be used to provide the more efficient mode of using of channel width to be to use base station to transmit data, and use distant station to receive the data of transmission then, be called multiple-input and multiple-output (MIMO) with a plurality of reception antennas with a plurality of antennas.The MIMO technology is proposed to wireless cellular system of future generation (such as third generation partnership projects (3GPP) standard).Because a plurality of allocating antennas are in reflector and receiver, so can realize more high power capacity or transmission rate.

When using mimo system to transmit grouping, if the grouping that receives has mistake, then receiver possibly need to retransmit same packets.Known following system, these systems provide the class symbol that shines upon with original transmitted differently.

Particular challenge in the wireless environment is to provide efficiently and reliably multicast and broadcast service (MBS) in modern times.Previous solution has many shortcomings.For example they can't solve the zone satisfactorily and cover or provide fully sane solution.

Therefore exist being used to transmit the needs of the professional improved procedure of MBS.

Summary of the invention

According to first broad aspect, a kind of method of in multiple-input and multiple-output (MIMO) communication, carrying out multicast and broadcast service (MBS) transmission is provided.This method comprises through a MIMO layer transmits first data, and first data are low-qualityer data.This method also comprises through the 2nd MIMO layer transmits second data, and second data are to be used to strengthen the enhancing data than low quality data.If successfully receive first and second data; Then will be according to low-qualityer data enhanced results being transmitted at subscriber station definition MBS with strengthening data; And if successfully receive first data and successfully do not receive second data, then will be only according to low-qualityer data in subscriber station definition MBS transmission.

According to second broad aspect, a kind of method of in multiple-input and multiple-output (MIMO) communication, carrying out multicast and broadcast service (MBS) transmission is provided.This method comprises through a MIMO layer transmits first data, and first data are low-qualityer data.This method comprises also whether selection transmits second data through the 2nd MIMO layer, and second data are the enhancing data that are used to strengthen low-qualityer data.If successfully receive first and second data; Then will be according to low-qualityer data enhanced results being transmitted at subscriber station definition MBS with strengthening data; And if successfully receive first data and successfully do not receive second data, then will be only according to low-qualityer data in subscriber station definition MBS transmission.

According to the 3rd broad aspect, provide a kind of and be used in the professional method of multiple-input and multiple-output (MIMO) communication transmission multicast and broadcast service (MBS).This method comprises from selecting to be used to transmit the transformat of MBS data among each has a plurality of available transmission formats of transmission mode.This method also comprises uses the transformat of selecting to transmit the MBS business.A plurality of available transmission formats comprise at least one transformat and another transformat at least; Wherein this at least one transformat comprises one of single-layer mode, spatial reuse (SM) pattern and hierarchical pattern, and another transformat comprises another pattern in single-layer mode, spatial reuse (SM) pattern and the hierarchical pattern at least.

The application's aspect and characteristic will examine read become when combining accompanying drawing and appendix that the hereinafter of disclosed specific embodiment is described into those of ordinary skills institute clear.

Description of drawings

The application's embodiment will only be described through example with reference to accompanying drawing now, in the accompanying drawings:

Fig. 1 is the block diagram of cellular communication system;

Fig. 2 is the block diagram that possibly be used for implementing the example base station of some embodiment of the application;

Fig. 3 is the block diagram that possibly be used for implementing the example wireless terminal of some embodiment of the application;

Fig. 4 is the block diagram that possibly be used for implementing the example relay station of some embodiment of the application;

Fig. 5 is the block diagram of logical breakdown that possibly be used for implementing the example OFDM transmitter architecture of some embodiment of the application;

Fig. 6 is the block diagram of logical breakdown that possibly be used for implementing the example OFDM receiver architecture of some embodiment of the application;

Fig. 7 is Fig. 1 of IEEE 802.16m-08/003rl, the example of overall network architecture;

Fig. 8 is Fig. 2 of IEEE 802.16m-08/003rl, the relay station in overall network architecture;

Fig. 9 is Fig. 3 of IEEE 802.16m-08/003rl, the system reference model;

Figure 10 is Fig. 4 of IEEE 802.16m-08/003rl, IEEE 802.16m protocol architecture;

Figure 11 is Fig. 5 of IEEE 802.16m-08/003r1, IEEE 802.16m MS/BS datum plane handling process;

Figure 12 is Fig. 6 of IEEE 802.16m-08/003rl, IEEE 802.16m MS/BS control plane handling process;

Figure 13 is Fig. 7 of IEEE 802.16m-08/003rl, is used to support the puppy parc framework of multicarrier system;

Figure 14 is a block diagram of wherein supporting the cellular communication system of MBS;

Figure 15 is the block diagram that comprises the DL subframe in MBS zone; And

Figure 16 is the block diagram of DL subframe, and this DL subframe comprises unicast data stack MBS zone on it.

Same numeral is used for representing similar units in difference figure.

Embodiment

With reference to accompanying drawing, Fig. 1 shows the base station controller (BSC) 10 of the radio communication in a plurality of sub-districts 12 of control, and these sub-districts are by respective base station (BS) 14 services.In some configurations, each sub-district further is divided into a plurality of sectors 13 or regional (not shown).Generally speaking; Each BS 14 promotes to use OFDM to communicate by letter with subscriber station (SS) 16; Subscriber station (SS) 16 can be can and can comprise with any entity of base station communication moving and/or wireless terminal or fixed terminal, and they are in the sub-district 12 related with corresponding BS 14.If SS 16 moves with respect to BS 14, then should move the obvious fluctuation that causes channel condition.As shown in the figure, BS 14 and SS 16 can comprise that being used to communicates by letter provides a plurality of antennas of space diversity.In some configurations, relay station 15 can be assisted communicating by letter between BS 14 and wireless terminal 16.SS 16 can be from any sub-district 12, sector 13, regional (not shown), BS 14 or relaying 15 switch 18 to other sub-districts 12, sector 13, regional (not shown), BS 14 or relaying 15.In some configurations, BS 14 communicates by letter with each through backhaul network 11 and communicates by letter with another network (such as core network or internet (all not shown)).In some configurations, need not base station controller 10.

With reference to Fig. 2, illustrate the example of BS 14.BS 14 generally comprises control system 20, BBP 22, radiating circuit 24, receiving circuit 26, a plurality of antenna 28 and network interface 30.One or more remote transmitter that receiving circuit 26 provides from SS 16 (shown in Fig. 3) and relay station 15 (shown in Fig. 4) receives the radiofrequency signal of beared information.Low noise amplifier and filter (not shown) can cooperate amplifying signal and remove broad-band interference so that handle from signal.Down-conversion and digitizer (not shown) will be downconverted into middle or baseband frequency signal to the reception signal of filtering then, and this signal is digitized into one or more digital stream then.

BBP 22 is handled digitized reception signal to extract information or the data bit that transmits in the signal that receives.This processing generally includes demodulation, decoding and error-correction operation.Like this, BBP 22 generally is implemented in one or more digital signal processor (DSP) or the application-specific integrated circuit (ASIC) (ASIC).Stride wireless network via network interface 30 then and send the information that receives, perhaps directly perhaps by the information of relaying 15 to another SS 16 these receptions of transmission of BS 14 services.

On transmission equipment side, BBP 22 can be represented the digitalized data of voice, data or control information and the data coding is used for transmission from network interface 30 receptions under the control of control system 20.To radiating circuit 24 outputting encoded datas, it is modulated by one or more carrier signal with one or more required tranmitting frequency at this radiating circuit.The power amplifier (not shown) will be amplified to modulated carrier signal the level that is suitable for transmitting and send modulated carrier signal through the matching network (not shown) to antenna 28.Hereinafter is more described modulation in detail and is handled details.

With reference to Fig. 3, illustrate the example of subscriber station (SS) 16.SS 16 for example can be a travelling carriage.Similar with BS 14, SS 16 will comprise control system 32, BBP 34, radiating circuit 36, receiving circuit 38, a plurality of antenna 40 and user interface circuit 42.Receiving circuit 38 receives the radiofrequency signal of beared information from one or more BS 14 and relaying 15.Low noise amplifier and filter (not shown) can cooperate with amplifying signal and remove the base band interference from signal and be used for handling.Down-conversion and digitizer (not shown) will be downconverted into middle or baseband frequency signal to the reception signal of filtering then, and this signal is digitized into one or more digital stream then.

BBP 34 is handled information or the data bit of digitized reception signal to transmit in the signal that is extracted in reception.This processing generally includes demodulation, decoding and error-correction operation.BBP 34 generally is implemented in one or more digital signal processor (DSP) and the application-specific integrated circuit (ASIC) (ASIC).

In order to transmit, BBP 34 receives the digitalized data that can represent voice, video, data or control information from control system 32, and it is used for transmission to this digital coding.To the data of radiating circuit 36 output encoders, these data are used for modulating one or more carrier signal that is in one or more required tranmitting frequency by modulator.The power amplifier (not shown) will be amplified to modulated carrier signal the level that is suitable for transmitting and send modulated carrier signal through the matching network (not shown) to antenna 40.Those skilled in the art can with various modulation and treatment technology be used for directly or via the signal transmission between SS and base station of relay station.

In the OFDM modulation, transmission band is divided into a plurality of orthogonal sub-carriers.Modulate each subcarrier according to numerical data waiting for transmission.Because OFDM is divided into a plurality of subcarriers with transmission band, so the bandwidth of each carrier wave reduces and the modulating time of each carrier wave increases.Because a plurality of subcarriers of parallel transmission, carry speed and be lower than when using single carrier wave so be used for the biography of numerical data or symbol (discussing after a while) or any given subcarrier.

The OFDM modulation utilizes treats information transmitted execution inverse fast Fourier transform (IFFT).For demodulation, the signal that receives is carried out fast Fourier transform (FFT) recover information transmitted.In practice, IFFT and FFT are provided by the Digital Signal Processing of carrying out inverse discrete Fourier transform (IDFT) and discrete Fourier transform (DFT) respectively.Thereby with the characteristic present of OFDM modulation for generating orthogonal sub-carriers to a plurality of frequency bands in the transmission channel.Modulation signal is the interior digital signal of frequency band that has low relatively transmission rate and can remain on them.Individual subcarriers is not directly modulated by digital signal.Replace through IFFT and handle all subcarriers of primary modulation.

In operation, OFDM preferably is used for the downlink transmission to SS 16 from BS 14 at least.Each BS 14 is equipped with " n " individual transmitting antenna 28 (n >=1), and each SS 16 is equipped with " m " individual reception antenna 40 (m >=1).Note respective antenna can be used to use reception and the transmission of suitable duplexer or switch and like this mark be merely and ask clear.

When using relay station 15, OFDM is preferably used for from BS 14 to relaying 15 and from the downlink transmission of relay station 15 to SS 16.

With reference to Fig. 4, illustrate the example of relay station 15.Similar with SS 16 with BS 14, relay station 15 will comprise control system 132, BBP 134, radiating circuit 136, receiving circuit 138, a plurality of antenna 130 and repeat circuit 142.Repeat circuit 142 makes relaying 14 can assist communicating by letter between base station 16 and SS 16.Receiving circuit 138 receives the radiofrequency signal of beared information from one or more BS 14 and SS 16.Low noise amplifier and filter (not shown) can cooperate amplifying signal and remove broad-band interference from signal and be used for handling.Down-conversion and digitizer (not shown) will be downconverted into middle or baseband frequency signal to the reception signal of filtering then, and this signal is digitized into one or more digital stream then.

BBP 134 is handled information or the data bit of digitized reception signal to transmit in the signal that is extracted in reception.This processing generally includes demodulation, decoding and error-correction operation.BBP 134 generally is implemented in one or more digital signal processor (DSP) and the application-specific integrated circuit (ASIC) (ASIC).

In order to transmit, BBP 134 receives the digitalized data that can represent voice, video, data or control information from control system 132, and it is used for sending to this digital coding.To radiating circuit 136 outputting encoded datas, it is used for modulating one or more carrier signal that is in one or more required tranmitting frequency at this radiating circuit by modulator.The power amplifier (not shown) will be amplified to modulated carrier signal the level that is suitable for transmitting and send modulated carrier signal through the matching network (not shown) to antenna 130.That kind described above, those skilled in the art can with various modulation and treatment technology be used for directly or via the indirect signal transmission between SS and base station of relay station.

With reference to Fig. 5, with description logic OFDM transmission architecture.Originally, base station controller 10 will be to the data of various SS 16 transmission with directly perhaps sending to BS 14 by relay station 15.BS 14 can use about the information of the channel quality related with SS and come data dispatching to be used to suitable coding and the modulation of transmitting and selecting to be used for the transmitting and scheduling data.That kind as described in greater detail below uses control signal to find quality of channel.Yet generally speaking, the channel quality that is used for each SS 16 is the function that channel magnitude (perhaps response) is striden the degree of OFDM frequency band variation.

Use data scrambling logic 46 with the mode that reduces the peak-to-average power ratio related with data dispatching 44 (these data are bit stream) to this data scrambling.Can confirm and use CRC to add logic 48 to the additional Cyclic Redundancy Check that is used for scrambled data of scrambled data.Then use channel encoder logic 50 to carry out chnnel coding and promote recovery and error correction at SS 16 places effectively to add redundancy to data.Equally, being used for the chnnel coding of specific SS 16 can be based on channel quality.In some embodiments, channel encoder logic 50 is used known Turbo coding techniques.Coded data is handled with the compensation data expansion related with coding by rate-matched logic 52 then.

Systematically resequence in position in 54 pairs of coded datas of position interleaver logic so that the loss of continuous data position is minimum.Mapping logic 56 systematically is mapped to corresponding symbol according to selected modulation scheme with the gained data bit.Modulation scheme for example can be quadrature amplitude modulation (qam) or QPSK (QPSK) or differential phase keying (DPSK) modulation.For the transmission data, can select degree of modulation based on the channel quality that is used for specific SS.Systematically reordered symbols is further supported the vulnerability to jamming of the cycle datas loss that (bolster) transmission signals cause frequency selective fading to use symbol interleaver logic 58.

In this point, hyte has been mapped to the symbol of the position in representative amplitude and the phase constellation.When the needs space diversity, symbolic blocks is handled by space-time block code (STC) encoder logic 60 then, this logic so that transmission signals more withstand disturbance and SS 16 more easily the mode of decoding revise symbol.STC encoder logic 60 is imported processing into symbol and " n " individual output corresponding with the quantity of the transmitting antenna that is used for BS 14 28 is provided.To be provided for controlling the mapping control signal that STC encodes like preceding text with reference to control system 20 and/or the BBP 22 that Fig. 5 describes.In this point, suppose to be used for the symbology data waiting for transmission of " n " individual output and can to recover by SS 16.

For this example, suppose that BS 14 has two antennas 28 (n=2) and STC encoder logic 60 provides two output symbol streams.Thereby send each symbols streams (for easy to understand diagram) separately of STC encoder logic 60 outputs to corresponding IFFT processor 62.Those skilled in the art will recognize that one or more processor can be used for alone or with other treatment combinations described herein such Digital Signal Processing is provided.IFFT processor 62 will preferably be operated so that inverse Fourier transform to be provided symbol.The output of IFFT processor 62 provides the symbol in the time domain.With the time-domain symbol packet framing, it is related with prefix with these frames that prefix is inserted logic 64.Each gained signal is via corresponding Digital Up Convert (DUC) and digital-to-analogue (D/A) change-over circuit 66 up-conversion to intermediate frequency and convert analog signal in numeric field.Then via RF circuit 68 and antenna 28 simultaneously at required RF frequency modulation(FM), amplification and transmission gained (simulation) signal.Notice that set SS 16 known pilot signals are scattered among the subcarrier.SS 16 can be used for channel estimating with pilot signal.

Directly receive the signal of transmission from BS 14 or by relaying 15 with explanation SS 16 referring now to Fig. 6.When transmission signals arrived each antenna 40 of SS 16, corresponding signal was separated to be in harmonious proportion by corresponding RF circuit 70 and is amplified.With clear, only describe and illustrate one of two RX paths in detail for the sake of clarity.Modulus (A/D) transducer and lower frequency changer circuit 72 digitlizations and down-conversion analog signal are used for digital processing.The gained digitized signal can be used for controlling the Amplifier Gain in the RF circuit 70 based on received signal level by automatic gain control circuit (AGC) 74.

Originally to the synchronous logic that comprises thick synchronous logic 78 76 digitized signal is provided, this thick synchronous logic 78 some OFDM symbols of buffering and calculating two auto-correlations between the OFDM symbol in succession.The gained time index corresponding with the maximum of correlation results confirmed the fine synchronization search window, and this search window is used for confirming accurately to become frame start position based on header by fine synchronization logic 80.The output of fine synchronization logic 80 promotes the frame of frame alignment logic 84 to obtain.It is important that appropriate framing is aimed at, and making follow-up FFT handle provides from the accurate conversion of time domain to frequency domain.The fine synchronization algorithm is based on the correlation between the local replica of reception pilot signal that header carries and known pilot data.In case the frame aligning occurring obtains; Just remove logic 86 and remove the prefix of OFDM symbols and send the gained sampling, do not mate the system frequency excursion that local oscillator causes in these frequency offset correction logic 88 compensate for emission devices and the receiver to frequency offset correction logic 88 with prefix.Preferably, synchronous logic 76 comprises frequency shift (FS) and clock estimation logic 82, and this logic 82 helps to estimate such provide those to estimate with appropriate processing OFDM symbol to the influence of transmission signals and to correcting logic 88 based on header.

In this point, the OFDM symbol in the time domain is ready to use FFT processing logic 90 to be converted to frequency domain.The result is the frequency domain symbol that sends to processing logic 92.Processing logic 92 uses scattered pilot extraction logic 94 to extract the scattered pilot signal, uses channel estimating logic 96 to confirm channel estimating and use channel reconstructing logic 98 for all subcarriers channel response to be provided based on the pilot signal of extracting.In order to confirm to be used for the channel response of each subcarrier, pilot signal comes down to a plurality of frequency pilot signs, and these a plurality of frequency pilot signs spread all over known pattern on time and frequency and are scattered in the OFDM subcarrier among the data symbol.Continue Fig. 6, the frequency pilot sign that processing logic relatively receives with in some time at the frequency pilot sign of some subcarrier expectation to confirm channel response to the subcarrier of transmitted pilot symbol wherein.If with to being not all then serve as most following residue subcarriers estimation channel responses, frequency pilot sign is not provided for these subcarriers to interpolation as a result.Actual and interpolation channel response is used for estimating overall channel response, if this response comprises be used for the OFDM channel be not all then be the channel response of most subcarriers.

To STC decoder 100 frequency domain symbol and the channel reconstruction information that derives according to the channel response that is used for each RX path is provided, this STC decoder 100 provides the STC to two RX paths to decode to recover transmission symbol.Channel reconstruction information provides the equalization information that is enough to when handling corresponding frequency domain symbol, remove the influence of transmission channel to STC decoder 100.

Use puts back in order restored symbol with the symbol interleaver logic 58 corresponding symbol deinterleaver logical ones 02 of reflector.Use then and separate mapping logic 104 with the deinterleaving symbol demodulation or separate and be mapped to corresponding bit stream.Use then with the position interleaver logic 54 corresponding position deinterleaver logical ones 06 of transmitter architecture and come the deinterleaving position.The deinterleaving position then by speed separate matching logic 108 handle and present to channel decoder logical one 10 with the data of recovering initial scrambling and CRC check and.Thereby CRC logical one 12 is removed CRC checks with, verification scrambled data in a conventional manner and it is offered descrambling logical one 14 be used to use the known base station descrambling code to come descrambling to recover the data 116 of original transmission.

Parallel with restore data 116, confirm and comprise to BS 14 transmission channel quality indication the CQI signal or be enough to derive the information of some knowledge of channel qualities at least at BS 14.With the transmission of describing the CQI signal hereinafter in more detail.Say that like preceding text CQI can be the function that carrier/interface ratio (CR) and channel response are striden the degree of the various sub-carrier variations in the OFDM frequency band.For example, the channel gain of each subcarrier of the information of transmitting of being used for that is used for the OFDM frequency band can compare to confirm that channel gain strides the degree that the OFDM frequency band changes each other.Though many technology can be used for measuring intensity of variation, a kind of technology is to calculate the standard deviation of channel gain of each subcarrier that is used for transmitting data be used for whole OFDM frequency band.In certain embodiments, relay station can only use a radio or replace to comprise that a plurality of radio operate with time division way.

Fig. 1 to Fig. 6 provides a concrete example of the communication system of the embodiment that can be used for implementing the application.Can have the communication system of following framework to implement the application's embodiment by apparatus with understanding, these frameworks are different with concrete example, but to operate with mode like the enforcement unanimity of the embodiments described herein.

Referring now to Fig. 7, show the example network reference model of the unrestricted embodiment according to the present invention, this network reference model is the logical expressions that are supported in aforementioned BS 14, SS 16 and relay station (RS) network of radio communication between 15.Network reference model identification function entity and through its between these functional entitys, realize the reference point of interoperability.Particularly, network reference model can comprise SS 16, visited service network (ASN) and connectivity serving network (CSN).

ASN can be defined as to subscriber (for example IEEE 802.16e/m subscriber) provides radio to insert and the complete network function collection of needs.ASN can comprise network element (such as one or more BS 14 and one or more ASN gateway).ASN can be shared by a more than CSN.ASN can provide following function:

is connected with the layers 1 and 2 of SS 16;

transmits authentication, mandate and the session book keeping operation that AAA message is used for being directed against session of subscriber to subscriber's home network services provider (H-NSP);

The network of subscriber's preferred NSP is found and is selected;

is used for setting up the 3rd layer of relay function that (L3) is connected (for example IP address assignment) with SS 16;

The provided for radio resources management.

Except above-mentioned functions, for portable and mobile environment, ASN can also support following function:

ASN grappling mobility;

CSN grappling mobility;

The paging;

ASN-CSN tunnelling.

CSN can be defined as the network function collection that the IP Connection Service is provided to the subscriber for its part.CSN can provide following function:

is used for the MS IP address and the endpoint parameter of user conversation and distributes;

AAA agency or server;

is based on the strategy and the access control of user's subscription profiles;

ASN-CSN tunnelling is supported;

Settle accounts between subscriber charging and operator;

Tunnelling between the CSN that is used to roam;

Mobility between ASN.

CSN can provide service (such as location based services, be used for equity service connection, provide, authorize and/or to the connection of IP multimedia service).CSN can also comprise network element (such as router, AAA proxy/servers, customer data base and interaction gateway MS).In the background of IEEE 802.16m, CSN can be deployed as the part of IEEE 802.16m NSP or be the part of incumbent (incumbent) IEEE 802.16e NSP.

In addition, RS 15 can be deployed improved covering and/or the capacity of providing.With reference to Fig. 8, can support the BS 14 of old RS to communicate by letter with old RS in " old zone ".Need not BS 14 and in " 16m zone ", old agreement support is provided.The trunk protocol design can be based on the design of IEEE 802-16j, although it can be different from the IEEE 802-16j agreement of in " old zone ", using.

Referring now to Fig. 9, show the system reference model, this model is applicable to that SS 16 with BS 14 and comprise various functional blocks, comprises medium access control (MAC) common ground sublayer, convergence sub-layer, Security Sublayer and physics (PHY) layer.

Convergence sub-layer is carried out mapping among the MAC SDU that the external network data that will receive through CS SAP receives through MAC SAP to MAC CPS, is associated with MAC SFID and CID, payload header inhibition/compression (PHS) to external network SDU classification and with them.

Security sublayer is carried out authentication and security key exchange and encryption.

Physical layer is carried out PHY and function.

MAC common ground sublayer is described now in more detail.It is connection-oriented at first will understanding medium access control (MAC).That is to say,, in " connection " background, carry out data communication from the service and the purpose of related variable QoS level that are mapped on the SS 16.Particularly, " service procedure " can, SS 16 be provided when being installed in the system.After registration SS 16, soon, connect related with these service procedures (connection of each service procedure) so that the reference to its bandwidth on demand to be provided.In addition, set up new the connection in the time of can need changing in client's service.Connect be defined in the equity of utilizing MAC converge between the process mapping and service procedure both.The service procedure definition is used at the qos parameter that connects cocommutative Medium Access Control (MAC) Protocol Data Unit (PDU).Therefore, service procedure and bandwidth allocation are integrated.Particularly, SS 16 asks uplink bandwidth (identification service flow process impliedly) on each connection basis.Can grant the polymerization of bandwidth by BS to MS in response to each connection request from MS as permission.

With reference to Figure 10, MAC common ground sublayer (CPS) is categorized into radio resource control and management (RRCM) function and medium access control (MAC) function in addition.

The RRCM function comprise with such as the relevant some functional blocks of the radio resource functionality of following content:

The provided for radio resources management

The mobile management

The management that networks

The location management

The management of idle pulley

The security management

The management of system configuration

MBS (multicast and broadcast service)

service procedure and connection management

The relay function

The self-organizing

The multicarrier.

Provided for radio resources management

The provided for radio resources management piece is based on traffic load adjustment radio network parameters and also comprise load control (load balancing), access control and Interference Control function.

Mobile management

The mobile management piece support with RAT interior/switch function associated between RAT.The mobile management piece handles in the RAT comprise circular and to measure/RAT between network topology obtain, manage candidate neighbours target BS/RS and also adjudicate MS whether carry out in the RAT/RAT between handover operation.

Management networks

The networking management block is responsible for initialization and access program.The networking management block can be created on the administrative messag that needs during the joining procedure (i.e. range finding, basic capability negotiating, registration etc.).

Location management

The location management piece is responsible for supporting location based services (LBS).The location management piece can generate the message that comprises LBS information.

The idle pulley management

The location update operations of idle pulley management block management during idle pulley.The idle pulley management block is controlled idle mode operations and is generated the paging report messages based on the beep-page message from the paging controller in the core network side.

Security management

The security management piece is responsible for being used for the authenticated/authorized and the key management of secure communication.

The system configuration management

System configuration management block management system configuration parameter and being used for to MS system for transmitting parameter and system configuration information.

MBS (multicast and broadcast service)

The administrative messag and the data of MBS (multicast and broadcast service) piece control and broadcasting and/or multicast service association.

Service procedure and connection management

Service procedure and connection management piece distribute " MS identifier " during visit/switching/service procedure creation procedure (perhaps station identifier-STID) and " process identification symbol " are (FID).Hereinafter will further be discussed MS identifier and FID.

Relay function

The relay function piece comprises the function that is used to support multi-hop relay mechanism.These functions comprise the program that is used to maintain BS and inserts the relay route between the RS.

Self-organizing

The self-organizing piece is carried out the function that is used to support self-configuring and self-optimizing mechanism.Function comprises and is used for being used for the measurement of self-configuring and self-optimizing and the program of measuring from the RS/MS reception to the RS/MS request report.

Multicarrier

The PHY that multicarrier (MC) piece can be controlled on a plurality of frequency channels common MAC entity crosses over.Channel can have different bandwidth (for example 5,10 and 20MHz), can in abutting connection with or non-adjacent frequency band on.Channel can be identical or different dual-mode (for example FDD, TDD or the two-way and only mixing of broadcast carrier).For in abutting connection with frequency channels, overlapping protection subcarrier is aimed at for use in transfer of data in frequency domain.

Medium access control (MAC) comprises and following physical layer and controlling links function associated piece, such as:

PHY control

controls signaling

The management of sleep pattern

□?QoS

scheduling and resource multiplex

□?ARQ

is cut apart/is encapsulated

MAC PDU forms

The coexistence of multi radio

The data forwarding

The interference management

Coordinate between BS.

PHY control

PHY controll block is handled PHY signaling (such as range finding, measurement/feedback (CQI) and HARQ ACK/NACK).Based on CQI and HARQ ACK/NACK, PHY controll block is estimated to carry out link adaptation like the being seen channel quality of MS and via adjusting modulation and encoding scheme (MCS) and/or power level.In ranging process, PHY controll block utilizes power adjustment, frequency shift (FS) and timing off-set to estimate to accomplish uplink synchronisation.

The control signaling

Control signaling piece generates resource allocation message.

The sleep pattern management

The sleep pattern management block is handled sleep mode operation.The sleep pattern management block also can generate the MAC signaling relevant with sleep operation, and can communicate by letter with the resource multiplex piece with scheduling so that the period appropriately operate according to sleep.

QoS

The QoS piece is based on handling QoS management with the connection management piece to each qos parameter input that is connected from service procedure.

Scheduling and resource multiplex

Scheduling is dispatched and multiplexing grouping based on the character that is connected with the resource multiplex piece.In order to reflect the character of connection, scheduling receives from the QoS piece with the resource multiplex piece and is used for the QoS information that each is connected.

ARQ

The ARQ piece is handled MAC ARQ function.For the connection that realizes ARQ.The ARQ piece logically splits into the ARQ piece with MAC SDU and to each logic ARQ block number.The ARQ piece also can generate ARQ administrative messag (such as feedback message (ACK/NACK information)).

Cut apart/encapsulate

Cut apart/package blocks carries out based on the scheduling result of coming self scheduling and resource multiplex piece and cuts apart or encapsulate MSDU.

MAC PDU forms

MAC PDU forms block structure MAC PDU, make BS/MS can be in the PHY channel the professional or administrative messag of transmission user.MAC PDU forms piece and adds mac header and can add sub-header.

The multi radio coexistence

Multi radio coexistence piece carry out be used to support to and place IEEE 802.16m and the function of the wireless concurrent operations of non-IEEE 802.16m on the identical travelling carriage.

Data forwarding

The data forwarding piece is carried out forwarding capability when RS is present on the path between BS and the MS.The data forwarding piece can cooperate with other pieces (such as scheduling and resource multiplex piece and MAC PDU formation piece).

Interference management

The interference management piece is carried out and is used to manage the function of disturbing between cell/section.Operation can comprise:

MAC layer operation

Interferometry/assessment report that sends via the MAC signaling

is through the interference mitigation of scheduling with flexible frequency reuse

PHY layer operation

The control of through-put power

The interference randomization

The interference eliminated

The interferometry

Formation/the precoding of Tx wave beam.

Coordinate between BS

Coordinate piece between BS and carry out the function that is used for coordinating the action of a plurality of BS through exchange message (for example interference management).Function comprises the program that is used for exchanging between BS through the trunk signaling and through MS MAC information receiving the information that for example is used for interference management.Information can comprise for example interference characteristic such as interference measurement results.

Referring now to Figure 11, the figure shows user service data flow process and processing at BS 14 and SS 16.Dotted arrow shows from the network layer to the physical layer and opposite user service data flow process.On transmission equipment side, network layer packet by convergence sub-layer, ARQ function (if existence), cut apart/encapsulation function and MAC PDU form function treatment to form (one or more) MAC PDU that will send to physical layer.On receiver side, physical layer SDU by MAC PDU form function, cut apart/encapsulation function, ARQ function (if existence) and convergence sub-layer function treatment to be to form network layer packet.Solid arrow shows between the CPS function and at the CPS control primitive relevant with the processing with user service data between the PHY.

Referring now to Figure 12, the figure shows CPS control plane signaling process and processing at BS 16 and MS 14.On transmission equipment side, dotted arrow show from the control plane function to data plane functions control plane signaling and data plane functions for form will be through the corresponding MAC signaling (for example MAC administrative messag, mac header/sub-header) of aerial transmission to the flow process of the processing of control plane signaling.On receiver side, dotted arrow shows data plane functions to the reception to corresponding control plane signaling of the processing of the aerial MAC signaling that receives and control plane function.Solid arrow shows between the CPS function and at the CPS control primitive relevant with the processing with the control plane signaling between the PHY.Solid arrow between M_SAP/C_SAP and MAC functional block shows and goes to/from the control and the management primitive of network control and management system (NCMS).Go to/from the definition of the primitive of M_SAP/C_SAP such as between BS between interference management, RAT/interior mobile management etc. relates to the function of network and such as location management, system configuration etc. and management function associated.

Referring now to Figure 13, the figure shows the puppy parc framework that is used to support multicarrier system.The PHY that common MAC entity can be controlled on a plurality of frequency channels crosses over.Some MAC message of on a carrier wave, sending also go for other carrier waves.Channel can have different bandwidth (for example 5,10 and 20 MHz), in abutting connection with or non-adjacent frequency band on.Channel can have different dual-modes (for example FDD, TDD or the two-way and only mixing of broadcast carrier).

Common MAC entity exist when can support to have the MS 16 of different abilities (such as once only on a channel operation or stride in abutting connection with or the gathering of non-adjacent channel).

With reference to the MIMO communication system embodiments of the invention are described.The MIMO communication system can be implemented to be used for the packet retransmissions present scheme according to IEEE 802.16 (e) and the use of IEEE 802.11 (n) standard.The packet retransmissions present scheme that hereinafter is described go for other wireless environments (such as but be not limited to wireless environment according to third generation partnership projects (3GPP) and 3GPP2 standard operation).

In describing hereinafter, term " mapping of STC code " is used for representing the mapping of symbol to antenna.Each symbol in such mapping can replace with it conjugation (for example S1*) or rotation (for example jS1 ,-S1 and-jS1) or the combination of its conjugation and rotation (for example jS1*).In certain embodiments, mapping also comprises the signal weighting that is used for each antenna.

Multicasting technology (a lot of destinations, a source) is widely used in the multimedia content delivery through network.Can use to the wireless transmission of subscriber station and expand the multicast service.In the multicast service, wireless system is to the subscriber station broadcast data packets, and each subscriber station receives and handle same packet stream.

MBS can only only be provided on down link in one direction and more specifically.Subscriber station in awake/sleep mode or in idle pulley possibly be able to receive the multicast and the broadcast service stream of reservation.

Figure 14 is the block diagram that comprises the exemplary cellular communication system 1400 of a plurality of sub-districts 1405, and each sub-district is by BS 1410 services of correspondence.BS 1410 can be similar with sub-district 12 with the BS 14 that describes above with reference to Fig. 1 with sub-district 1405.As among Fig. 1, in this example, each microzonation is divided into a plurality of sectors 1415, although in other embodiments can not such division of cells.BS 1410 promote to use OFDM with the communicating by letter of subscriber station (SS) 1425, these SS can be 16 similar with the SS that describes above with reference to Fig. 1, but more generally can be can with any entity of base station communication.In this example, SS 1425 subscribes MBS or more generally receives the MBS data from BS 1410.

Cellular communication system 1400 comprises the MBS zone 1420 that MBS wherein is provided according to a certain MBS scheme.In this example, MBS is transmitted as Single Frequency Network (SFN) transmission.

Size (comprising the quantity of sub-district 1405 and sector 1415 and the shape and relative size of sub-district 1405 and sector 1415) and the shape that understanding is comprised the cellular communication system 1400 in MBS zone 1420 is merely gives an example and cellular communication system 1400 can be different in other examples.For example MBS zone 1420 can cross over whole cellular communication system 1400, can be with only one or several sub-districts 1405 be the same little.In addition, the description to MBS zone 1420 and use therein MBS scheme here goes under the situation of single sector 1415, and nearly one or several sectors 1415 can be crossed in MBS zone 1420.

Professional from BS 1410 in the DL subframe to the downlink transmission MBS of SS 1425.More specifically, transmission MBS is professional in special-purpose MBS zone.Figure 15 shows the DL subframe 1500 that comprises MBS zone 1505 and clean culture zone 1510.In clean culture zone 1510, it is professional to transmit non-MBS in any appropriate manner.Name clean culture zone 1510 to distinguish it and MBS regional 1505 like this from the purpose of this example.Yet will understand clean culture zone 1510 can be any zone of wherein transmitting non-MBS data.

As shown in the figure, the MBS zone comprises that following MBS is professional, and this MBS business comprises MBS control information and the MBS data in the MBS data subregion 1520 in the MBS control subregion 1515.

For asking simplification, show whole transfer resources that the DL subframe takies with explanation DL subframe with the piece form.Can define the transfer resource that the DL subframe takies in any appropriate manner according to the coded/modulated scheme of using with understanding.For example in the OFDM scheme, can aspect time (for example being used to send the time interval of a symbol) and frequency (for example subcarrier), define transfer resource to the DL sub-frame allocation.

In this example, definition DL subframe 1500 aspect OFDM interval and subcarrier.Can be yet will understand with transfer resource except taking by the parameter-definition DL subframe 1500 time and the frequency.For example, if dedicated frequency will be distributed to down link fully, then can define DL subframe 1500 uniquely by frequency.In other examples, can be in definition DL subframe 1500 aspect time (for example OFDM is at interval), subcarrier, frequency expansion sequence or its appropriate combination.In fact can use the pattern of any suitable separated transmission.

Similarly, will understand and to use any suitable parameter type to define MBS zone 1505 and clean culture zone 1510.In this example, OFDM at interval with subcarrier aspect the transfer resource that takies as as a whole the DL subframe 1500 the same MBS of definition zones 1505 and clean culture zone.Yet be to be understood that also and can define the transfer resource that these zones take with other modes.Need not in addition to use with DL subframe 1500 identical parameters and define these zones.For example can define them by the specific frequency expansion sequence that is used for each zone.

In this example, DL subframe 1500 comprise MBS zone 1505 and clean culture zone 1510 both.Use FDM come multiplexing these.Yet be to be understood that MBS zone 1505 can take whole DL subframe.

In this example, MBS zone 1505 is a regional area.That is to say that it is adjacency on time and frequency.Yet will understand MBS zone 1505 and also can be on time, frequency or both the not distributed zone of adjacency.Distributed MBS zone can provide more multi-frequency classification to the MBS business.Particularly, distributed MBS zone can multi-frequency divides collection in order hour to provide more in the number of sectors of participating in the SFN transmission.

Configuration and the position thereof (transfer resource that for example takies thus---under this situation, be time and frequency) in MBS zone can be provided to SS 1425 with any suitable mode.In one example, BS can use the configuration in signaling MBS zone 1505.For example BS can through to all SS or only subscribe MBS service those SS can with any suitable broadcasting control, multicast control or clean culture control regional configuration and position with signaling MBS.In alternative exemplary, agree in advance and specifically do not use the configuration in signaling MBS zone 1505.

Control the MBS control information that comprises in the subregion 1515 at MBS and can comprise information about the appearance cycle that perhaps regional or data occur of MBS zone or data next time about MBS.

For professional to the MBS of catenet transmission, multipath channel length possibly grown.Professional in order to adapt to the MBS of catenet transmission, can define bigger Cyclic Prefix size.To be configured to provide the size of the Cyclic Prefix in the big or small DL subframe of less Cyclic Prefix in order enlarging, to remove an OFDM symbol from the DL subframe 1500 that comprises MBS zone 1505.The Cyclic Prefix that increases residue OFDM symbol then is to fill the original sub frame duration.To understand:, only remove an OFDM symbol from subframe and think and to remove more symbols so in other embodiments than systemic circulation prefix vacating space although in this example.

The channelizing that is used for MBS zone 1505 and pilot frequency design can be striden and participated in all sectors that SFN transmits is identical.Particularly, the pilot tone that is used for MBS transmission can be at the defeated public guide frequency of identical tone uploading in each sector of participating in the SFN transmission.Any suitable pilot frequency design can be used for MBS tragedy (tragic).Being used for the professional pilot frequency design of MBS can be identical with the unicast pilot pattern or different.In this concrete example, the MBS pilot frequency design is similar with the pilot frequency design that is used for unicast transmission, but have higher pilot signal density.

As shown in Figure 15, the MBS control information is contained in the MBS zone 1505.Though show here the MBS control information for MBS zone 1505 in MBS control subregion 1515, will understand MBS control subregion 1515 can be non-adjacent and be distributed in the MBS regional 1505.

Figure 16 shows the DL subframe 1600 that similarly comprises MBS zone 1605 and clean culture zone 1610 with the DL subframe 1500 of Figure 15.MBS zone 1605 also comprises MBS control subregion 1615 and MBS data subregion 1620.In this example, unicast data is added on the MBS business in the MBS zone 1605.Under these circumstances, the clean culture control information can be contained in the MBS zone 1605.Particularly, clean culture is controlled in the MBS control in the MBS control subregion 1615 that can be added to.So as shown in the figure, MBS control subregion 1615 can comprise MBS SFN control 1625 that relates to the SFN transmission and the clean culture control information 1630 that superposes.The clean culture control signaling and the message format that in the clean culture zone, use can be used for the unicast service in the signaling MBS zone 1605.It can be used for specifying the configuration and/or the position of the unicast service in the MBS zone 1605.

Return the example of Figure 15, generally speaking, all sectors 1415 can be used SFN to be transmitted on the same transmission resource in the MBS zone 1505 and sent common MBS control information.If some control informations, then can be used transfer resource SS 1425 these control informations of broadcasting in sector 1415 beyond the MBS zone 1505 specific to particular sector 1415.

Can use three kinds of different modes transmission MBS professional.In first mode, MBS is professional to be that individual layer transmits.Under this situation, from the phase place that for example has the signal power that is used to maximize input and/or each transmit antenna emission same signal of gain weighting.This can be called single-layer mode.

Under second situation, usage space multiplexing (SM) is professional through a plurality of MIMO layer transmission MBS.This can be called the SM pattern.Under this situation, can use single code word (SCW) or a plurality of code words (MCW) to transmit data.Yet generally speaking, each sector in MBS zone 1420 or the SFN network will use the identical traffic form to transmit all MIMO layers.

The professional Third Way of transmission MBS is to use hierarchical layer.In this hierarchical pattern, can transmit two-layer or multilayer more.Ground floor is the basal layer that carries low-qualityer data.In this context, the quality of data can be meant a plurality of things.In one example, qualitative data is meant the quality of the electronic product of its definition.For example basal layer can carry and the corresponding data of media product (having low-quality audio frequency, video or audio and video equipment).For example low-qualityer data can define the video that has than low bitrate or resolution.

The second layer is an enhancement layer.This one deck carries following additional information, and this additional information is replenished low-qualityer data to strengthen the quality in the data of basal layer transmission with the form that strengthens data.Basal layer can be used for identical MBS transmission with enhancement layer.Use above-mentioned example, additional information can be carried following information, and this information is used to increase bit rate or the resolution by the video of the low-qualityer data definition that transmits through ground floor.

Can comprise any data that can strengthen with understanding the enhancing data than low quality data.For example strengthening data can transmit to be used to add to the 2D cinematic data that transmits through basal layer and add the information of 3D or can comprise and be used for high bit rate is provided more or is used for to view data more high-resolution data being provided to the voice data through the basal layer transmission.Strengthening data also can be through providing other the peripheral or additional quality of improving low-qualityer data that strengthen than low quality data.For example strengthen data can to the video data through basal layer transmission or with through the music VF data of enhancement layer transmission relevant the special edition art work and/or song information closed captioning is provided.

In addition, such as through additional redundancy property is provided, strengthen data and can be not used in the enhancing electronic terminal product and be used for strengthening low-qualityer data itself.

Beyond the second layer, also can provide additional enhancement layer to be used for further improving quality in the data of basal layer transmission to provide other to strengthen data.For example basal layer can carry the low-qualityer data corresponding with the low-resolution video data, and enhancement layer can carry and be used to the enhancing data improving the quality of low-qualityer data and more specifically be used to strengthen the resolution of corresponding video data.Can provide the 3rd layer as second enhancement layer.This 3rd layer can be other enhancing data that are used for further strengthening low-qualityer data.This can accomplish through the result that other enhancing data are applied to utilize the enhancing data to strengthen than low quality data.For example strengthen the resolution that data can for example be used to strengthen the video of low-qualityer data definition, and other strengthen data and can be used for further strengthening resolution.Alternatively, other strengthen data and can be directly applied for low-qualityer data or be applicable to separately low-qualityer data and with the enhanced results of enhancing data to it.For example the 3rd layer can for example comprise closed caption data or supplemental audio data (such as the audio track of different language).Under these circumstances, the 3rd layer data can be applied to low-qualityer data perhaps strengthen low-qualityer data with second layer data result.

In hierarchical pattern, no matter whether transmit the enhancing data, can preset or can optionally select or can preset and optionally select the transmission configuration and the number of plies used.For example each BS can adjudicate how many hierarchical layer of utilization and can be restricted.In the non-restrictive example of hierarchical pattern, there are two possibility transport layers to be used: basal layer described above and single enhancement layer.Basal layer and enhancement layer can be transmitted in the heart sector (such as sector 1415I) in MBS zone 1425, and near MBS regional 1425 or the sector (such as sector 1415O) at edge can be limited to and only transmit basal layer.

Transformat definition of data transmission mode (individual layer, SM or classification) and the transmission configuration in transmission, used, such as Modulation and Coding Scheme (MCS), the type of coding that this MCS definition is used or the modulation scheme of speed and use.In hierarchical pattern, be used for the MCS of MBS transmission can be for different layers difference.For example basal layer can use more sane MCS to be received by SS 1425 to guarantee the low-qualityer data of transmitting through basal layer at least.

MCS table can be enumerated transformat and can comprise the information about the transformat enumerated of any amount.In the background of cellular communication system 1400, being used for MBS traffic transmission form can be by the index indication of MBS MCS table.Particularly, MBS MCS table can be SM or classification to each MCS index definition transmission.In addition, MBS MCS table can give a definition different modulating level and bit rate (comprising modulation and bit rate in each layer use) to be used in the situation of hierarchical pattern.Following table 1 is exemplary MBS MCS table.

The exemplary MBS MCS table of table 1 –.

Table 1 comprises eight different transpost formats.MCS level indicating modulation encoding scheme level and can be used as the index of a certain transformat that is used for label table.Field parameter also can be served this purpose.Preceding four single-layer modes that such formal definition is different, each pattern is corresponding to different modulating level and/or bit rate.First form comprises QPSK modulation and repeats twice 1/3 bit rate.Other three forms comprise QPSK, 16 QAM and 64 QAM respectively, and each form has 1/3 bit rate.Because these transformats are individual layer all, so there is not secondary (table should be described modulation and the encoding scheme that is used for this grade).

The 5th and the hexformat of in table 1, enumerating uses hierarchical pattern.That kind described above, in this pattern, basal layer carries low-qualityer data, and enhancement layer carries the enhancing data.As shown in the figure, two-layer can but need not to have same modulation scheme and bit rate.Particularly, in the 5th transformat of enumerating, basal layer and enhancement layer use the bit rate of QPSK modulation and 1/3.In the 6th transformat of enumerating, basal layer uses the QPSK modulation, and enhancement layer uses 16QAM (both has 1/3 bit rate).

The the 7th and the 8th transformat of in table 1, enumerating uses the SM pattern.These utilizations are two-layer, although modulation scheme is identical for two-layer with bit rate.

For hierarchical pattern, to the selection of the classification number of plies of using can be made by BS 1410.BS 1410 can select the classification number of plies with utilization on any suitable basis.In non-restrictive example, BS 1410 receives feedback from SS 1425.Feedback is the information of any indication transmission conditions.For example feedback can indicative of channel conditions or quality.Perhaps the feedback can be simply to previous transmission be successfully or the failure indication.Feedback also can comprise any other information that perhaps possibly influence transmission about the information of the receiving ability of SS 1425 or position.

In order to realize being used for the professional required covering of MBS, BS 1410 can come the transformat of the adaptive SFN of being used for transmission based on the MBS feedback that the SS that communicates by letter with it from it 1425 receives.

Generally speaking, the MBS feedback from SS 1425 is the low-rate feedback of the service quality of indication MBS data.Can use any suitable feedback scheme, and BS 1410 selects the mode of transformat to depend on the feedback kind of reception.In one example, feedback can be to be used for the professional request transformat of MBS.Alternatively, feedback can be the form of ack/nack (ACK/NACK) designator, and NACK can indicate MBS packet error rate (PER) to surpass a certain threshold value thus.

In response to such feedback, BS 1410 can make response through the subclass of only using hierarchical layer.The transformat of in the MBS control information, indicating in some instances, can be inconsistent with the actual transmissions form that BS 1410 uses.For example the MBS control information can be indicated the utilization hierarchical transmission, but BS 1410 can only use ground floor.If for example BS 1410 has adjudicated the classification number of plies that reduces the more reliable transmission be used for realizing low-qualityer data then this point can occur.Under these circumstances, will not receive (owning) enhancing data though SS 1425 receives the MBS transmission, they still will receive low-qualityer data through basal layer.

Only appear for exemplary purposes and the example of the table 1 that is intended to by no means limit understanding like the MBS MCS table of table 1 shown in the above.Particularly, should be noted that: MBS MCS table can comprise more or still less field/row be used to carry information about any amount that is contained in transformat wherein.According to the quantity of the such transformat that can be used for MBS, MBS MCS table can certainly comprise still less or multiple transport formats more.

Table 2 shows the more simple examples of MBS MCS table:

The MCS level	Modulation	Bit rate	Field
					1	?	?	00
2	?	?	01
				3	?	?	10
4	?	?	11

Table 2 – one-level MBS MCS table.

As shown in the figure, in table 2, be not provided for modulating two-stage with bit rate.This form can be used for the instance that MBS wherein only uses single-layer mode.In addition, when shortage is used for defining the mode parameter field of pattern of each transformat that is used to show to enumerate, can not use table 2 defining mode (individual layer/SM/ classification).

If yet never homology obtains to use the SM pattern to carry out the knowledge of MBS transmission (if for example this is be used for the MBS zone known pre-conditioned); If BS knows that all layers in the MBS transmission will use identical modulation scheme and the bit rate enumerated so, then table 2 still can be used for defining transformat.Likewise, if know that the use hierarchical pattern is carried out MBS to be transmitted, if all layers will use same modulation scheme and bit rate or more generally need not the information about extra play so, then table 2 also can be useful.

Table 3 shows the exemplary MBS MCS that is used for only using with hierarchical pattern and shows.

Table 3 – is used for the exemplary MBS MCS table of classification.

Table 3 is the examples like following table, and this table can be used for wherein only using hierarchical pattern to transmit the professional instance of MBS and not comprise pattern field.Because each transmission mode that will enumerate impliedly is defined as the utilization hierarchical pattern, so each transmission mode is enumerated multistage modulation and the bit rate that is used for respective layer.In this example, in each transformat, use two-layer.To understand also and can use more multilayer.In addition, when using multilayer, be not that all transformats need use all layers.

Table 4 shows individual layer transformat shown in the above-mentioned table 2 and exemplary MBS MCS table from some hierarchical transmission format combination of above-mentioned table 3.Therefore this form defines the transformat that different mode is defined.

The exemplary MBS MCS table of table 4 – combination different mode

If transformat comprises single-layer mode and SM pattern, then can produce similar table.Table 5 shows exemplary MBS MCS table, the transformat of this lists utilization individual layer and SM pattern.

The exemplary MBS MCS table of table 5 – combination different mode

At last, MBS MCS table can be enumerated the transformat that uses individual layer, SM and hierarchical pattern.Table 6 is examples that such MBS MCS shows.As shown in the figure, table 6 comprises the modulation that is used for two-stage and the field of coding, if the pattern of indicating to this specific transmission is a hierarchical pattern, then these fields can have different value.

The exemplary MBS MCS table of table 6 –.

If a more than MBS network or the zone of transmitting the different MBS transmission are arranged in cellular communication system 1400, then contiguous MBS zone can be used for non-overlapped MBS zone the transmission of their corresponding MBS content.On the resource that contiguous MBS network uses, can transmit the lower-wattage unicast data.

In addition, for using additional resource to transmit the MBS business in the sector 1415 at the regional edge of MBS.Can be used for tracking (chase) combination or incremental redundancy as accomplishing by additional information transmission at the HARQ that is used for unicast data.Can or transmit this information in the subframe afterwards in the subframe identical with original MBS transmission.This can use SFN to cross over some sectors or independent completion the on the basis of each sector.

The foregoing description of the application is intended to be merely for example.Those skilled in the art can realize change, modification and the variation to specific embodiment and the scope that do not break away from the application.

Claims (15)

1. in multiple-input and multiple-output (MIMO) communication, carry out the method that multicast and broadcast service (MBS) is transmitted for one kind, comprising:

A. transmit first data through a MIMO layer, said first data are low-qualityer data; And

B. transmit second data through the 2nd MIMO layer, said second data are the enhancing data that are used to strengthen said low-qualityer data;

If wherein successfully receive said first and second data; Then will be according to said low-qualityer data enhanced results being transmitted at subscriber station definition MBS with said enhancing data; And if successfully receive said first data and successfully do not receive said second data, then will only define said MBS transmission at said subscriber station according to said low-qualityer data.

2. method according to claim 1; Wherein use first encoding scheme to send said first data, and use second encoding scheme different with said first encoding scheme sent said second data through said the 2nd MIMO layer through a said MIMO layer.

3. method according to claim 2, wherein said first encoding scheme are that QPSK and said second encoding scheme are 16QAM.

4. method according to claim 1; Wherein use first encoding scheme to send said first data, and use second encoding scheme different with said first encoding scheme sent said second data through said the 2nd MIMO layer through a said MIMO layer.

5. method according to claim 1 also comprises through the 3rd MIMO layer and transmits the 3rd data, and said the 3rd data are other enhancing data that are used for further strengthening said low-qualityer data.

6. method according to claim 5 wherein further strengthens said low-qualityer data and comprises that said other are strengthened data is applied to the result with the said low-qualityer data of said enhancing data enhancing.

7. in multiple-input and multiple-output (MIMO) communication, carry out the method that multicast and broadcast service (MBS) is transmitted for one kind, comprising:

A. transmit first data through a MIMO layer, said first data are low-qualityer data; And

B. select whether transmit second data through the 2nd MIMO layer, said second data are the enhancing data that are used to strengthen said low-qualityer data;

If wherein successfully receive said first and second data; Then will be according to said low-qualityer data enhanced results being transmitted at subscriber station definition MBS with said enhancing data; And if successfully receive said first data and successfully do not receive said second data, then will only define said MBS transmission at said subscriber station according to said low-qualityer data.

8. method according to claim 7 also comprises the feedback that receives the indication transmission conditions from subscriber station, wherein accomplishes selection based on said feedback and whether transmits second data.

9. method according to claim 8 also comprises based on said feedback selecting whether to transmit the 3rd data through the 2nd MIMO layer, and said the 3rd data are other enhancing data that are used for further strengthening said low-qualityer data.

10. method according to claim 8 is wherein accomplished selection based on the geographical position and whether is transmitted second data.

11. whether method according to claim 9 wherein transmits second data based on accomplishing selection with the vicinity at the edge of MBS region covered.

12. one kind is used for comprising in the professional method of multiple-input and multiple-output (MIMO) communication transmission multicast and broadcast service (MBS):

A. from selecting to be used to transmit the transformat of MBS data among each has a plurality of available transmission formats of transmission mode;

B. use the transformat of selecting to transmit the MBS business;

Wherein said a plurality of available transmission formats comprises at least one transformat and another transformat at least; Said at least one transformat comprises one of single-layer mode, spatial reuse (SM) pattern and hierarchical pattern, and said another transformat at least comprises another pattern in single-layer mode, spatial reuse (SM) pattern and the hierarchical pattern.

13. method according to claim 12, the wherein said a plurality of transformats of definition in MBS Modulation and Coding Scheme (MCS) table.

14. method according to claim 12, wherein said a plurality of transformats comprise first transformat, and said first transformat comprises hierarchical pattern.

15. method according to claim 14; Wherein said first transformat comprises also and is used for transmitting first modulation and the encoding scheme of first data and second modulation and the encoding scheme that is used for transmitting through the second layer second data through ground floor that said second data are replenished said first data.

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