CN101496370A - Method and apparatus for broadcast multicast service in an ultra mobile broadband network - Google Patents

Abstract

A method and apparatus for broadcast multicast service in an ultra mobile broadband network is provided. An apparatus is provided which is operable in a wireless communication system to provide a means for mapping broadcast flows to a broadcast multicast logical channel and transmitting the broadcast multicast logic channel on an aggregation of broadcast physical channels, where each of the aggregation of the broadcast physical channels is uniquely characterized. Radio configurations to support the ultra mobile broadband network are also provided.

Description

Be used for ultra-mobile wide band network broadcast multi-broadcasting service method and device

Related application

The application requires to enjoy the U.S. Provisional Application No.60/833 that the name of submitting on July 28th, 2006 is called " BCMCS inUHDR-one ", 940 priority.

Technical field

The present invention relates generally to communication system, relate more specifically to be used for LBC broadcast multi-broadcasting service method and device.

Background technology

The great development of wireless communication technology is obvious to all in the past few years.This development part is that the freedom of movement that provided by wireless technology and the quality of the voice communications versus data communications on the very big improved wireless medium promote.Along with the increase of data, services, improved voice service quality already and will continue communication public cause is brought material impact.Supplementary service is included in when roaming and uses mobile device to enter the Internet and receive the broadcast or multicast service.

These wireless systems can be to support the multi-address system that communicates with a plurality of users by sharing free system resources (for example, bandwidth and transmitted power).The example of this multi-address system comprises code division multiple access (CDMA) system, time division multiple access (TDMA) system, frequency division multiple access (FDMA) system, 3GPP Long Term Evolution (LTE) system and OFDM (OFDMA) system.

Usually, wireless multiple-access communication system can be supported the communication to a plurality of wireless terminals simultaneously.Each terminal comes to communicate with one or more base stations via the transmission on forward link and the reverse link.Forward link (or down link) is meant the communication link from the base station to the terminal, and reverse link (or up link) is meant the communication link from terminal to base station.This communication link can be set up via the single output of single input, the single output of many inputs or multiple-input and multiple-output (MIMO) system.

Mimo system adopts a plurality of (N _T) transmitting antenna and a plurality of (N _R) reception antenna carries out transfer of data.By N _TIndividual transmitting antenna and N _RThe mimo channel that individual reception antenna constitutes can be decomposed into N _SIndividual independently channel, these independently channel be also referred to as space channel, N wherein _S≤ min{N _T, N _R.N _SIn the individual independent channel each is corresponding to a dimension.If utilize the additional dimension of being created by a plurality of transmitting antennas and reception antenna, then mimo system can provide improved performance (for example, bigger throughput and/or higher reliability).

Mimo system is supported time division duplex (TDD) and Frequency Division Duplexing (FDD) (FDD) system.In the TDD system, forward link is on identical frequency field with rl transmission, makes that reversible principle allows to estimate forward link channel according to reverse chain channel.This makes that but access point can extract the transmit beam-forming gain on the forward link when at the access point place there being a plurality of antenna time spent.

For system, adopt two class dispatching techniques usually: sub-band scheduling and diversity scheduling based on FDMA.In sub-band scheduling, user grouping is mapped to the tone assignment that is restricted to than narrow bandwidth.Sub-band scheduling also can be called frequency selection scheduling (FSS).Comparatively speaking, in the diversity scheduling, user grouping is mapped to the tone assignment of crossing over the whole system bandwidth.The diversity scheduling also can be called frequency hopping scheduling (FHS).

Frequency hopping is generally used for realizing channel and interference diversity.Therefore, can in the broadcast or multicast environment, utilize the frequency selection scheduling in subband, to carry out frequency hopping.

In giving fixed system, all users can or can always not be benefited from FSS.Therefore, need a kind of jump structure, make that frequency selection scheduling user and frequency hopping dispatched users can both be easily multiplexing in identical TTI.In addition, need a kind of radio configuration, to support the broadcast multi-broadcasting service among the ultra broadband mobile network, wherein this ultra broadband mobile network allows bandwidth reserved to be used for broadcast service, depends on the operating flexibility of clean culture and broadcasting load, quick switching time, and the minimum recovery time that accesses terminal, thereby improve battery efficiency.

Summary of the invention

An embodiment provides a kind of device that runs in the wireless communication system, this device provides the module that is used for broadcasting stream is mapped to broadcast multi-broadcasting service logic channel, and the module that is used for sending BCMC logical channel on the broadcast physical channel collection is provided, wherein each concentrated channel of this broadcast physical channel is characterized uniquely.

Another embodiment provides a kind of method, be used for just broadcasting stream and be mapped to broadcast multi-broadcasting service logic channel and send BCMC logical channel on the broadcast physical layer channel set, wherein each concentrated channel of broadcast physical channel is characterized uniquely.

A kind of machine readable media that comprises instruction also is provided here, wherein, when carrying out these instructions by machine, has made machine carry out following operation: will broadcast stream and be mapped to broadcast multi-broadcasting service logic channel; And on the broadcast physical channel collection, send broadcast multi-broadcasting service logic channel, wherein each concentrated channel of broadcast physical channel is characterized uniquely.

Another embodiment provides a kind of processor and has been coupled to this processor to be used to store memory of data, this processor is used for broadcasting stream is mapped to broadcast multi-broadcasting service logic channel, and send BCMC logical channel on the broadcast physical channel collection, each broadcast physical channel is characterized uniquely.

Description of drawings

Fig. 1 shows multi-address radio communication system according to an embodiment of the invention.

Fig. 2 is the block diagram of communication system according to an embodiment of the invention.

Fig. 3 is the view of index BCMCS subband according to an embodiment of the invention.

Fig. 4 shows the ERROR CONTROL block structure of outside according to an embodiment of the invention Reed Solomon sign indicating number.

Fig. 5 is the parity matrix of (16,12,4) outer sign indicating number according to an embodiment of the invention.

Fig. 6 is the parity matrix of (16,13,3) outer sign indicating number according to an embodiment of the invention.

Fig. 7 is the parity matrix of (16,14,2) outer sign indicating number according to an embodiment of the invention.

Fig. 8 is the parity matrix of (32,24,8) outer sign indicating number according to an embodiment of the invention.

Fig. 9 is the parity matrix of (32,26,6) outer sign indicating number according to an embodiment of the invention.

Figure 10 is the parity matrix of (32,28,4) outer sign indicating number according to an embodiment of the invention.

The expense that Figure 11 shows according to the radio configuration of various embodiments of the invention compares.

Figure 12 shows the hierarchical modulation according to the embodiment of the invention.

Figure 13 has defined the rate set that is used for a 1.25MHz according to an embodiment of the invention.

Figure 14 shows pilot tone insertion according to an embodiment of the invention.

Figure 15 shows according to the subband s of the embodiment of the invention and 0 the BCMCS project organization of interweaving.

Figure 16 shows the field according to the broadcast channel information message of the embodiment of the invention.

Figure 17 shows the decipher according to the BCMCS reserve interleaved of the embodiment of the invention.

Embodiment

Here word " exemplary " is used for expression " example or example as an example, ".The embodiment that will not be described as " exemplary " here is interpreted as more preferred or favourable than other embodiment.

With reference to Fig. 1, it shows the multi-address radio communication system 100 according to an embodiment.Access point 102 (AP) comprises a plurality of antenna sets, and one group comprises 104 and 106, and another group comprises 108 and 110, and other one group comprises 112 and 114.In Fig. 1, only show two antennas at each antenna sets, yet, can utilize more or less antenna at each antenna sets.Access terminal 116 (AT) and antenna 112 and 114 communicates, wherein antenna 112 and 114 by forward link 120 to the 116 transmission information that access terminal, and by reverse link 118 from the 116 reception information that access terminal.Accessing terminal 122 communicates with antenna 106 and 108, wherein antenna 106 and 108 by forward link 126 to the 122 transmission information that access terminal, and by reverse link 124 from the 122 reception information that access terminal.In the FDD system, communication link 118,120,124 and 126 can use different frequency to communicate.For example, forward link 120 can use and the different frequency of reverse link 118 employed frequencies.

Every group of antenna and/or the zone that is designed to communicate can be called the sector of access point.In an embodiment, antenna sets is designed to accessing terminal in the sector with 102 overlay areas of access point separately and communicates.

By in forward link 120 and 126 communicate by letter, the transmitting antenna of access point 102 utilizes beam shaping, so that improve the signal to noise ratio of 116 and 124 the forward link of being used to access terminal.Than through individual antenna to it all access points that access terminal and send, the access point that uses beam shaping accessing terminal in being randomly dispersed in its whole coverage to send causes littler interference to accessing terminal in the neighbor cell.

Access point can be to be used for the fixed station that communicates with terminal, and also can be called access point, Node B or some other terms.Access terminal also can be called and access terminal, subscriber equipment (UE), Wireless Telecom Equipment, terminal, access terminal or some other terms.

Fig. 2 is the block diagram that comprises the mimo system 200 of transmitter system 210 (being also known as access point) and receiver system 250 (be also known as and access terminal).At transmitter system 210 places, the business datum of a plurality of data flow is provided to emission (TX) data processor 214 from data source 212.

In an embodiment, launch each data flow by transmitting antenna separately.TX data processor 214 comes the business datum of this data flow is formatd, encodes and interweaves based on the specific coding scheme of selecting at each data flow, and coded data is provided.

Use the OFDM technology, carry out the coded data and the pilot data of each data flow multiplexing.The known data patterns that pilot data is normally handled in a known way, and can be at the receiver system place in order to estimate channel response.Then, based at the selected modulation scheme of each data flow (for example, BPSK, QSPK, M-PSK or M-QAM), the multiplexed pilot and the coded data of this data flow are modulated (that is, sign map), so that modulation symbol is provided.Can determine data rate, coding and the modulation of each data flow by the instruction of carrying out by processor 230.Instruction can be stored in the memory 232.

Then, the modulation symbol of all data flow is provided to TX MIMO processor 220, this processor is further handled modulation symbol according to modulation scheme (for example, at OFDM).TX MIMO processor 220 is subsequently with N _TIndividual stream of modulation symbols is provided to N _TIndividual transmitter (TMTR) 222a is to 222t.In certain embodiments, the symbol of 220 pairs of data flow of TX MIMO processor and to sending the antenna applications beam shaping weighting of this symbol.

Each transmitter 222 receives respectively and process symbol stream, so that one or more analog signals to be provided, and further regulates (for example, amplification, filtering and up-conversion) this analog signal, so that the modulated signal that is suitable for transmitting on mimo channel to be provided.Then, respectively from N _TIndividual antenna 224a launches from the N of transmitter 222a to 222t to 224t _TIndividual modulated signal.

At receiver system 250 places, the modulated signal of being launched is by N _RIndividual antenna 252a receives to 252r, and will be provided to separately receiver (RCVR) 254a from the signal that each antenna 252 receives to 254r.Each receiver 254 is regulated (for example, filtering, amplification and down-conversion) to the signal that each received, and adjusted signal is carried out digitlization so that sampling to be provided, and further handles sampling so that corresponding " reception " symbols streams to be provided.

Then, RX data processor 260 based on concrete receiver treatment technology from N _R Individual receiver 254 receives N _RIndividual receiving symbol flows and it is handled, so that N to be provided _TIndividual " detecting " symbols streams.Subsequently, RX processor 260 to each detected symbol stream carry out demodulation, deinterleaving and decoding, with the business datum of restore data stream.The processing of RX data processor 260 is reciprocal with the processing of being carried out by the TX MIMO processor 220 and the TX data processor 214 at transmitter system 210 places.Instruction can be stored in the memory 272.

Processor 270 determines to use which pre-coding matrix (as discussed below) termly.Processor 270 constitutes the reverse link message that comprises matrix index part and order value part.

This reverse link message can comprise the various types of information about communication link and/or received data stream.Subsequently, this reverse link message is handled by TX data processor 238, is modulated by modulator 280, and 254a regulates to 254r by transmitter, and send back to transmitter system 210, wherein this TX data processor also receives the business datum of a plurality of data flow from data source 236.

At transmitter system 210 places, modulated signal from receiver system 250 is received by antenna 224, is regulated by receiver 222, carries out demodulation by demodulator 240, and handle by RX data processor 242, to extract the reverse link message that sends by receiver system 250.Which pre-coding matrix processor 230 determine to use be used for determining the beam shaping weighting subsequently, and the message of extracting with reprocessing.

Then, transmission and receiving symbol stream on channel.On the one hand, logic channel is categorized as control channel and Traffic Channel.Logical control channel comprises: Broadcast Control Channel (BCCH), and it is the DL channel that is used for the broadcast system control information; Paging Control Channel (PCCH), it is the DL channel that is used to transmit paging information; Multicast control channel (MCCH), its be point to multiple spot DL channel, be used to send multimedia broadcasting and multicast service (MBMS) scheduling and to the control information of one or several multicast service channel (MTCH).Usually, after setting up the RRC connection, only (annotate: UE original MCCH+MSCH) uses this channel by receiving MBMS.Dedicated Control Channel (DCCH) is the point-to-point two-way channel, and it sends dedicated control information and is used by the UE with RRC connection.On the one hand, the logic business channel comprises Dedicated Traffic Channel (DTCH), and it is the point-to-point two-way channel that is exclusively used in a UE, is used to transmit user profile.In addition, multicast service channel (MTCH) is used for sending business datum putting on the multiple spot DL channel.

On the one hand, transmission channel is categorized as DL and UL.The DL transmission channel comprises broadcast channel (BCH), downlink shared data channel (DL-SDCH) and paging channel (PCH), be used for wherein supporting that the PCH of UE economize on electricity (indicating DRX cycle to UE by network) broadcasts in whole sub-district, and be mapped to the PHY resource that can be used for other control/Traffic Channel.The UL transmission channel comprises Random Access Channel (RACH), request channel (REQCH), up link shared data channel (UL-SDCH) and a plurality of PHY channel.The PHY channel comprises one group of DL channel and UL channel.

Downlink physical channel comprises as lower channel: Common Pilot Channel (CPICH), synchronizing channel (SCH), Common Control Channel (CCCH), share down link (DL) control channel (SDCCH), multicast control channel (MCCH), share up link (UL) allocated channel (SUACH), acknowledgement channel (ACKCH), down link (DL) physics shared data channel (DL-PSDCH), up link (UL) power control channel (UPCCH), Page Indication Channel (PICH), and load indicating channel (LICH).

Up link (UL) physical channel comprises as lower channel: Physical Random Access Channel (PRACH), channel quality indicating channel (CQICH), acknowledgement channel (ACKCH), antenna subset indicating channel (ASICH), sharing request channel (SREQCH), up link (UL) physics shared data channel (UL-PSDCH) and broadband pilot channel (BPICH).

According to one side, the disclosure provides the BCMCS in the high data rate network.BCMCS is the shorthand of broadcasting on the IP network and multicast service.This service can allow the user to use the Ultra-Mobile Broadband system to receive various contents (for example, video/text) by cellular link on its handheld device.Some aspect of the present disclosure more specifically is discussed in the paragraph below.

In certain embodiments, the disclosure provides the method for using in wireless communication system.Broadcasting stream can be mapped to the BCMCS logic channel.Can on the collection of broadcast physical channel, send the BCMCS logic channel.Each channel that broadcast physical channel is concentrated can characterize uniquely by SIMT (subband-interweave-multiplexing tlv triple Sub-band-Interlace-Multiplex Triple).

Embodiment of the present disclosure allows the RSVP on the forward link.This bandwidth can be used for broadcasting and multicast transmission.Broadcast multicast system (BCMCS) is transmitted in and carries out index in the units of super-frames.Each superframe is interweaved by a plurality of subdomains and 48 very big frames of physical layer and forms.

Can from the broadcast overhead channel of association, obtain information about the physical location of logic channel.In each superframe, allow nearly four broadcast overhead channels.The sets of physical channels that each broadcast overhead channel is addressed to is come mark by subband group i, and wherein i can represent numerical value 0 to 3.Comprise information at the broadcast overhead channel that transmits on the superframe about the logic channel that on superframe k+1, transmits.

Each subband group i is divided in the individual external frame of NumOuterframesPerUltraframei (the external frame number i in each superframe) NumOuterframesPerUltraframei=1 wherein, 2,4 or 8.Each outer frame related with SubbandGroupi (subband group i) is to each the logic channel transmission primaries in the superframe.

But minimum allocation units are subbands on interweaving.This is distributed on the forward direction master Broadcast Control Channel (FPBCCH) and transmits.Yet, have at least one subband not to be allocated for the broadcast multi-broadcasting transmission on each interweaves.This subband carrying is used for the control signaling of rl transmission.

The BCMCS subband carries out index according to mode as described below.On each physical layer frame, each group that is made of 128 hop-ports as a broadcasting and a multicast service part is called a BCMCS subband.The position of these BCMCS subbands is announced in BroadcastchannelInfo (broadcast channel information) message.Should be noted that in these hop-ports some can be mapped to the protection carrier wave, and therefore be not useable for transfer of data.

In each superframe, the BCMCS subband carries out index by the UltraframeSubbandIndex (superframe subband index) that is numbered 0 to NumSubbandsPerUltraframe-1.Allow the physical layer frame of BCMCS to be numbered according to ascending order with the lower physical layer frame of the numbering that occurs in time more early.If occur more than a BCMCS subband in physical layer frame, then each subband is numbered with ascending order.

As an example, consider that 5MHz disposes, wherein each BCMCS subband is 128 hop-ports on the physical layer frame, and each hop-ports is expressed as a grid in Fig. 3.The subband of reserving is represented with the shade grid, and the BCMCS subband is the shade grid with index.This index is called UltraframeSubbandIndex.In the drawings, per eight four subbands of reservation that interweave, wherein three are assigned to BCMCS.

On the forward link, frequency-hopping mode has avoided distributing to the subband of broadcast multi-broadcasting service.This allows the broadcast multi-broadcasting transmission to utilize the unifrequency network operation.

Adjacent sectors sends same signal.

Particularly, forward broadcast and multicast service channel are applicable to the SFN transmission, carry out synchronously its broadcast transmitted all sectors in the wherein given broadcast coverage areas, and send identical waveform (not comprising sector correlation delay and complex gain) aloft during the time interval of distributing to the broadcast physical layer grouping.At the antenna place that accesses terminal, all transmission that will arrive from the sector that participates in are made up so that appear to single transmission through multipath channel, wherein this multipath channel may first and last arrival path between have bigger delay expansion.

Physical layer utilizes two kinds of algorithms to carry out the broadcast multi-broadcasting transmission.Each is disposed and only uses a kind of form.On physical layer, must be in overhead requirements, have the high-speed cruising that reaches the decay of 350kph appropriateness and reach between 40 milliseconds the delay expansion and weigh.For two kinds of algorithms, the broadcast multi-broadcasting frame is arranged in rows with the physical layer frame that is used for conventional unicast transmission.

Coding on the physical layer and modulation utilize internal rate 1/5turbo sign indicating number, and this sign indicating number is with identical in unicast system.Outer sign indicating number relies on the Reed-Solomon sign indicating number to be provided for the time diversity of ERROR CONTROL.

Outside Reed-Solomon sign indicating number uses ERROR CONTROL block structure as shown in Figure 4.The ERROR CONTROL piece is the capable and individual row formation of MACPacketSize (MAC divides into groups big or small) by N.The capable payload that comprises in the service agreement of K above the ERROR CONTROL piece, wherein a part is to fill grouping.The capable Reed-Solomon parity check eight bit byte that comprises of R=N-K below the ERROR CONTROL piece.

Payload packet on the broadcast logical channel (BLC) is protected by outer sign indicating number, and each piece of possibility BLC data has an outer sign indicating number.In operation, the span of aforesaid external control sign indicating number is the span of S superframe with BLC of BOC cycle N, and wherein S is the multiple of N.For UFt, the ECB of BLC is made of S continuous superframe sequence, wherein t mod S=0.If N|S, then the parameter of service broadcast overhead channel (BOC) changes on the ECB border.

(or wipe (erasures)) sequence of BPC on the BLC on S superframe grouping is written in the capable C column matrix of R by row.Fill any project of losing with full zero packets.For optimally diversified, should cushion all superframe hard decisions.Each R is capable, and X 1 byte submatrix equals (R, k) the reception code word of Reed-Solomon sign indicating number, and compatible with the broadcast multi-broadcasting service that strengthens.

The time span of error correcting block is as described below.The minimum switching time of broadcast logical channel and the span of ECB are proportional, and wherein this ECB is a S superframe.The S value is more little, and the switching spot is fast more.On the longer time period, the data rate of broadcast logical channel is approximately Mean Speed.If fix for longer time period broadcast logical channel, then can improve expense.S has also increased the Reed-Solomon sign indicating number, thereby increases diversity.

Use for non-stream, need longer error correcting block.And use for stream, can use shorter error correcting block, so that realize better switching time.

Each row of ERROR CONTROL piece has constituted the payload of the broadcasting MAC grouping of given logic channel, wherein the broadcast physical layer transmitted in packets begin sentence time sequencing and distribute in the broadcast physical layer grouping of this given logic channel and send this given logic channel.In fact, the ERROR CONTROL piece is the capable C column matrix of R, R=1 wherein, 16 or 32.R and C are the attributes of BLC, and notify with signal form in broadcast channel information message, will more specifically describe broadcast channel information message below.Line width is determined by going up the payload packet sequence that sends at extended channel BCMCS (ECB).

It is capable to make payload equal K if desired, and then Access Network can add broadcasting PCP grouping to filling grouping.These groupings comprise complete zero payload, and are not sent to physical layer, therefore aloft do not send.

According to the description in the following paragraph, generated error controll block.

Access Network is divided into ERROR CONTROL piece (ECB) with the transmission on the logic channel.Each ERROR CONTROL piece should be with zero or a MAC grouping beginning that is received by BCMCS MAC.

Then, Access Network is filled into data in the ERROR CONTROL piece by row.Access Network is used the Reed-Solomon sign indicating number along the row of ERROR CONTROL piece.Access Network sends this ERROR CONTROL piece by row on forward broadcast and multicast service channel.

Each ERROR CONTROL piece comprises N row and MACPacketSize row.The K at top is capable in the ERROR CONTROL piece comprises from the payload in agreement of being served or the filling grouping.The capable Reed-Solomon parity check eight bit byte that comprises of R=N-K of bottom in the ERROR CONTROL piece.The length of each Reed-Solomon code word is N eight bit byte.Each ERROR CONTROL piece is made of a Reed-Solomon code word.The Reed-Solomon sign indicating number is appointed as (N, K, R) sign indicating number.With N, K, R is defined as follows:

The number of eight bit byte in the N=Reed-Solomon code word.The value of N should meet here by with reference to regulation that incorporate into, among Ultra-Mobile Broadband (UMB) the air interface physical layer standard C.S0084-1.

The number of data octets in the K=Reed-Solomon code word.The value of K should meet here by with reference to regulation that incorporate into, among Ultra-Mobile Broadband (UMB) the air interface physical layer standard C.S0084-1.

The number of parity check eight bit byte in the R=N-K=Reed-Solomon code word.The value of R should meet here by with reference to regulation that incorporate into, among Ultra-Mobile Broadband (UMB) the air interface physical layer standard C.S0084-1.

Each row of ERROR CONTROL piece constitutes the payload of one or more broadcasting MAC grouping.

Logic channel carries out this logic channel on all sectors of soft combination allowing to access terminal, and uses to have identical N, K and MACPacketSize error in value controll block.

Outer sign indicating number is to use 8 bit symbols and carries out and be called GF (2 in galois field ⁸) the Reed-Solomon block code of computing.The primitive element α that is used for this territory defines by following formula:

α ⁸+α ⁴+α ³+α ²+1＝0

J code sign (j=0,1,2 ..., N-1), v _jDefine by following formula:

$v_j=\left\{\begin{array}{cc}{\mathrm{<figure-callout\; id="0"\; label="u\; j"\; filenames="A20078002828900251.png,A20078002828900271.png"\; state="\{\{state\}\}">u</figure-callout>}}_j& 0\&le;j\&le;K-1\\ \underset{i=0}{\overset{K-1}{\mathrm{\&Sigma;}}}{u}_i*p_{i,j}& K\&le;j\&le;N-1\end{array}\right.$

Wherein

N and K be as herein defined (N, K, the R) parameter of Reed-Solomon sign indicating number,

u _jJ in the piece of forming by K information symbol,

p _{I, j}Be the array element that the capable j of i lists in the parity matrix of this yard,

* represent multiplication and addition among the GF (28) respectively with.

(1,1,0) Reed-Solomon sign indicating number

(1,1,0) sign indicating number generates a code sign for each information symbol that is input in the encoder.

(16,12,4) Reed-Solomon sign indicating number

(16,12,4) sign indicating number generates 16 code signs for each that is input in the encoder by the piece that 12 information symbols constitute.Preceding 12 symbols are information symbols, and remaining 4 symbols are parity check symbols.The generator polynomial that is used for (16,12,4) sign indicating number is

g(X)＝1+α ²⁰¹X+α ²⁴⁶X ²+α ²⁰¹X ³+X ⁴

The parity matrix that is used for (16,12,4) Reed-Solomon block code is as defined in Fig. 5.

(16,13,3) Reed-Solomon sign indicating number

(16,13,3) sign indicating number generates 16 code signs for each that is input in the encoder by the piece that 13 information symbols constitute.Preceding 13 symbols are information symbols, and remaining 3 symbols are parity check symbols.The generator polynomial that is used for (16,13,3) sign indicating number is

g(X)＝1+α ¹⁹⁷X+α ¹⁹⁷X ²+X ³

The parity matrix that is used for (16,13,3) Reed-Solomon block code is as defined in Fig. 6.

(16,14,2) Reed-Solomon sign indicating number

(16,14,2) sign indicating number generates 16 code signs for each that is input in the encoder by the piece that 14 information symbols constitute.Preceding 14 symbols are information symbols, and remaining 2 symbols are parity check symbols.The generator polynomial that is used for (16,14,2) sign indicating number is

g(X)＝1+α ¹⁵²X+X ²

The parity matrix that is used for (16,14,2) Reed-Solomon block code is as defined in Fig. 7.

(32,24,8) Reed-Solomon sign indicating number

(32,24,8) sign indicating number generates 32 code signs for each that is input in the encoder by the piece that 24 information symbols constitute.Preceding 24 symbols are information symbols, and remaining 8 symbols are parity check symbols.The generator polynomial that is used for (32,24,8) sign indicating number is

g(X)＝1+α ⁴⁴X+α ²³¹X ²+α ⁷⁰X ³+α ²³⁵X ⁴+α ⁷⁰X ⁵+α ²³¹X ⁶+α ⁴⁴X ⁷+X ⁸

The parity matrix that is used for (32,24,8) Reed-Solomon block code is as defined in Fig. 8.

(32,26,6) Reed-Solomon sign indicating number

(32,26,6) sign indicating number generates 32 code signs for each that is input in the encoder by the piece that 26 information symbols constitute.Preceding 26 symbols are information symbols, and remaining 6 symbols are parity check symbols.The generator polynomial that is used for (32,26,6) sign indicating number is

g(X)＝1+α ³⁶X+α ²⁵⁰X ²+α ²⁵⁴X ³+α ²⁵⁰X ⁴+α ³⁶X ⁵+X ⁶

The parity matrix that is used for (32,26,6) Reed-Solomon block code is as defined in Fig. 9.

(32,28,4) Reed-Solomon sign indicating number

(32,28,4) sign indicating number generates 32 code signs for each that is input in the encoder by the piece that 28 information symbols constitute.Preceding 28 symbols are information symbols, and remaining 4 symbols are parity check symbols.The generator polynomial that is used for (32,28,4) sign indicating number is

g(X)＝1+α ²⁰¹X+α ²⁴⁶X ²+α ²⁰¹X ³+X ⁴

The parity matrix that is used for (32,28,4) Reed-Solomon block code is as defined in Figure 10.

According to signal to noise ratio, physical layer is also supported the hierarchical modulation at different pieces of information speed.In fact, physical layer relies on two-layer transmission, basic layer and enhancement layer.

The term definition that uses in system is as follows:

M is the number of OFDM symbol in the frame.

N is total tone (tune) number.

N _GIt is the number of protection tone.

N _uBe the number of employed tone, it equals N-N _G

N _pBe the number of pilot tones, and N _GPIt is the number of pilot tones in boundary belt.

N _dBe the number of data tones, it equals N _u-N _p+ N _GP

N _cBeing the number of chip in every frame, is 4480 for native system.

N _MBe the number of modulation symbol in the frame, it equals M*N _d

F _sBe sample frequency, 4.9152MHz.

F _oBe that intercarrier is apart from F _s/ N.

T _cBe chip duration, 1/F _s=203.45ns.

T _fFrame duration=911.4ms.

T _wBe window duration (N _wIndividual chip).

T _CPIt is the Cyclic Prefix duration.

Use an embodiment of the radio configuration of above-mentioned parameter to have the following stated feature:

M＝7

N＝512

N _G＝32，N _W＝16

N _u＝N-N _G＝480

N _p=64 (4 in the protection tones)

N _d＝N _u-N _p＝420

F _o＝F _s/N＝9.6kHz

T _CP=22.78ms (112 chips are about 17.5% expense)

N _M＝M*N _d＝7*420＝2940

Raw data rate=0.75*Mod order * M*N _d/ T _f:

QPSK：4.8Mbps

16QAM：9.7Mbps

64QAM：14.5Mbps

Another embodiment of radio configuration provides the radio configuration with bigger delay expansion and low Doppler frequency shift.The feature of this system is following given:

M＝3

N＝1280(256×5)

N _G＝84，N _W＝16

N _u＝N-N _G＝1196

N _p=160 (12 in the guard time intervals)

N _d＝N _u-N _p＝1016

F _o＝F _s/N＝3.8kHz

T _CP=39.67ms (13.2% expense) { 197*2+198}

N _M＝M*N _d＝3048

Raw data rate=0.75*Mod order * M*N _d/ T _f:

QPSK：5Mbps

16QAM：10Mbps

64QAM：15Mbps

Another embodiment of radio configuration provides has bigger delay expansion and than the radio configuration of high doppler shift.The feature of this system is following given:

M＝6

N＝512

N _G＝32，N _W＝16

N _u＝N-N _G＝480

N _p=128 (8 in the protection tones)

N _d＝N _u-N _p＝360

F _o＝F _s/N＝9.6kHz

T _CP=44.5ms (being about 29.2% expense)

{218*2+219*4}

N _M＝M*N _d＝2160

Raw data rate=0.75*Mod order * M*N _d/ T _f:

QPSK：3.6Mbps

16QAM：7.1Mbps

64QAM：10.7Mbps

Another embodiment of radio configuration provides less delayed expansion and low Doppler frequency shift.The feature of this system is following given:

M＝4

N＝1024

N _G＝64，N _W＝16

N _u＝N-N _G＝960

N _p=128 (8 in the protection tones)

N _d＝N _u-N _p＝840

F _o＝F _s/N＝4.8kHz

T _CP=16.2ms (80 chips are about 7.1% expense)

N _M＝M*N _d＝3360

Raw data rate=0.75*Mod order * M*N _d/ T _f:

QPSK：5.5Mbps

16QAM：11Mbps

64QAM：16.6Mbps

Figure 11 provides the expense of above-mentioned radio configuration to compare.

Can revise above-mentioned broadcast radio configuration at different unicast cyclic prefix length.Above first and second embodiment hypothesis be about 6.51ms (32 chips are 512 situation for the FFT size) for the clean culture OFDM symbol cyclic prefix duration.If the Cyclic Prefix duration of clean culture OFDM symbol is longer by (64,96 or 128 chips, for the FFT size 512 situation), then the Cyclic Prefix duration of first and second radio configuration embodiment suitably increases, so in the ideal case, in a chip, different broadcasting OFDM symbols has circulating prefix-length much at one in the frame.The duration of physical layer frame (being 7 OFDM symbols in first embodiment, perhaps is 3 OFDM symbols in second embodiment) equals clean culture physical layer frame (8 clean culture OFDM symbols) just.

The key component of physical layer is coding and modulation treatment.Speed 1/5 parallel Turbo code is used for block length.This sign indicating number is deleted surplus, to reach required bit rate.Outside Reed-Solomon sign indicating number is used for error correction.Above outside Reed-Solomon sign indicating number is described.

Physical layer is supported some packet formats, comprises QPSK, 16QAM and 64QAM.In addition, the modulation that the physical layer support is progressively downward, and be supported in variable transmission rate in time domain and the frequency domain, so that carry out broadcast multi-broadcasting service based on section.And, also be supported in during the given transmission packets from specifying Single Frequency Network OFDM algorithmic transformation to clean culture OFDM algorithm.

By utilizing the logic channel at the enhancement layer place that hierarchical modulation is provided, wherein enhance lamination is added on the basic layer of logic channel of locating of physical layer.This user who allows to be under the good reception situation carries out demodulation to logic channel more high-rise but not basic layer of place, thereby improved quality is provided.Figure 12 shows hierarchical modulation.

Physical layer is utilized various rate set and packet format, to finish the broadcast multi-broadcasting service in the Ultra-Mobile Broadband system.Two kinds of modulation have been defined, 16QAM and QPSK.Allow hierarchical modulation as discussed above.As the example of hierarchical modulation, basic layer uses the 16QAM modulation, and optional extension layer uses the QPSK modulation.Four kinds of rate set have been defined at basic layer and extension layer.These four kinds of rate set are applicable to every kind of proposed algorithm.

Figure 13 has defined the rate set that is used for a 1.25MHz subband according to an embodiment.When distributing a plurality of subband, increase the grouping size pro rata and increase data rate.

Two kinds of algorithms have been defined.Default algorithm is used 512FFT and 7 OFDM symbols is encapsulated in the time slot.Expansion algorithm provides higher delay expansion, lower Doppler frequency shift, and uses 1280FFT and 3 OFDM symbols are encapsulated in the time slot.In every kind of rate set, (that is, maximum span) packet format uses clean culture algorithm (512FFT, wherein 8 OFDM symbols of each time slot) in last transmission to have the maximum transmitted number.

The pilot tone that physical layer also is provided in the data flow is inserted.Pilot-frequency expense is 12.5%, and wherein per the 8th tone has a pilot tones.In addition, pilot tone is inserted and is used two stagger tunes.Greatly the OFDM symbol in the frame carries out mark in order, and the pilot tone position of odd number symbols is carried out the displacement of four tones.Pilot tones is carried out the basic pilot shift of content (from 0 to 7).Avoided the conflict between a plurality of pilot tones of the boundary between the different Single Frequency Network sections like this.In addition, business is flexibly with the pilot power ratio, allows to increase pilot power to improve accuracy of channel estimation.

Media interviews controls (MAC) layer carries out work in conjunction with physical layer, the broadcast multi-broadcasting service is delivered to the portable terminal that needs this service in the Ultra-Mobile Broadband system.Broadcasting stream is meant concrete channel or local program, and wherein channel can be local channel or global channel, such as CNN ESPN.Also can provide Additional Services, such as stock quotation or timetable.Discern each broadcasting stream by flow identifier or stream ID.

Broadcast multi-broadcasting service logic channel (BLC) is the set of stream.The MAC layer also provides broadcast physical channel (BPC).Can on a plurality of BPC, send BLC.Each BPC can be made up of a plurality of " continuous " resource.Resource in this article is made up of the single subband on the physical layer frame.Secondly subband at first carries out index according to the time according to frequency.This regulation has reduced " reviving " time of moving or accessing terminal, and has increased battery useful life.Access Network sends BroadcastChannelInfo (broadcast channel information) message, with to inserting or portable terminal provides mapping between logic channel and the BPC.

Logic channel shines upon to physical channel

Each forward broadcast and multicast service channel are made up of a plurality of BCMCS subbands of stipulating in BroadcastChannelInfo message and be mapped to logic channel.

The logic channel carrying is from the broadcasting PCP grouping of one or more BCMCS streams.Although identical BCMCS stream can independently send on some logic channels, the content of given BCMCS stream is not shared on a plurality of logic channels.If with BCMCS stream be carried on belong to different sectors more than on one the logic channel, then BCMCS flows to being mapped in of physical channel does not need identical on all these sectors.The logic channel of carrying same broadcast content can be on a plurality of sectors synchronized transmission, to help soft combination.The logic channel related with forward broadcast and multicast service channel can be on a plurality of sectors synchronized transmission.

Optional embodiment allows BPC to pass through subband interlace-multiplex tlv triple (SIMT) to characterize uniquely.SIMT be given HARQ interweave and given subband on the burst length of physical layer frame.For different SIMT, the burst length difference that is to say, the burst length of physical layer frame is represented by burst length among the SIMT.Interweave at every turn multiplexing can be 1,2,4 or 8, and for all interweave, can fix.Figure 15 shows according to the subband s of the embodiment of the invention and 0 the BCMCS project organization of interweaving.

Broadcast logical channel (BLC) by scramble sequence, comprise that PL packet transmission format and the outer code parameters of modulating classification characterize.Different BLC is mapped to the disjoint sets of BPC.Yet, keep the modulation classification, that is, send each BLC as basic layer or as enhancement layer.The result modulates by QPSK modulation or 16QAM to send each BLC.BPC with identical BLC utilizes identical PL transformat.

For above-mentioned unifrequency network operation, each BLC operation is described below.A lot of BLC are mapped to a unifrequency network.Sector in the unifrequency network uses identical BPC and scrambling to send BLC.

The information of the logic channel PDR parameter during the indication of BroadcastChannelInfo message bearing is used.This broadcast channel information message sends as unicast service, and carrying BLC information.BLC information comprises: mapping, BLC transformat, the extended channel BCMCS (ECB) between stream and the BLC, comprise professional pilot frequency information to the pilot tone quota, scramble sequence, the BPC of the different broadcast overhead channels of mark (BOC) and the mapping between BLC and the BOC.All parameters in the broadcast channel information message have the timer of expiring.Therefore, needn't continuous monitoring BroadcastChannelInfo message for accessing terminal.In addition, enough send BroadcastChannelInfo message continually, to be easy to the initial acquisition that accesses terminal.Figure 16 has described the field in the BroadcastChannelInfo message.

The MessageID Access Network should this field be set to 0x00.

The ProtocolSubtype Access Network should this field be set to constant.

If any other field in the BroadcastChannelInfoSignature BroadcastChannelInfo message changes,

Then Access Network should change this field.

The QCISignature Access Network should this field be set to the QCISignature of overhead message protocol

Publicly-owned data.

The AllReservedInterlaces Access Network should this field be set to " 1 ", indicates all of all reserve interleaved

Reserve subband and be used for BCMCS, otherwise Access Network should be provided with this field

Be " 0 ".

If BCMCSReservedInterlaces AllReservedInterlace field is set to " 1 ", then Access Network should be neglected

Omit this field.Otherwise Access Network should comprise this field, and right according to Figure 17

It is provided with.All subbands during these interweave should be used for BCMCS.

The MAC layer sends in superframe.A superframe equals 48 very big frames.The duration of superframe is about 1.1 seconds, and has the interchannel that is about 1.7 seconds average switching time.Each superframe is divided into N outer frame (OF), N=1 wherein, 2,4 or 8.In each superframe, at the description of BCMCS subband index, the BCMCS subband is carried out index as mentioned.

Each superframe logically carries out multiplexing to channel.The instantaneous source speed of individual channel changes in time, yet, constant substantially on superframe from total payload of all channels.Superframe is big more, and this degree of approximation is high more.Longer superframe can provide statistical multiplexing gain and time diversity, but with the buffer size that is used for Voice ﹠ Video coding bigger and postpone longer and switching time longer be cost.

Under the background of other channel, broadcast overhead channel (BOC) is discussed.Overhead channel provides the information needed that is independent of broadcasting stream.Four the broadcast overhead channels (BOC) that reach the maximum number that is limited as the NumBOC parameter can be carried in each sector of Access Network.Send BOC in outside each of subband group in the frame last, two, four or eight OFDM symbols.

The modulation parameter of carrying BOC in BroadcastChannelInfo message.Except that BOC, each logic channel also carries the in-band information about the position of its next relatively superframe.In fact, BOC is dedicated broadcast logic channel (BLC), and it is provided for the time diversity of reliable decoding.

BOC is effectively for next superframe, is updated up to content.Can every N superframe, configuration is upgraded to BLC, and wherein N is the cycle of the BOC related with BLC.Channel bearing is used for the in-band signalling of next superframe.Therefore, do not need to switch, and do not need BOC is decoded, thereby allow operation more efficiently.

Allow another mechanism of efficient operation more to be included in the statistic multiplexing that uses the variable bit business on forward broadcast and the multicast service channel, wherein here by with reference among Ultra-Mobile Broadband (UMB) the air interface physical layer standard of incorporating into, the C.S0084-1 this forward broadcast and multicast service channel being described.This regulation is applicable to most broadcast multi-broadcasting service channels.Statistic multiplexing is followed the law of large numbers.Along with the increase of BLC number, total speed is shifted to Mean Speed.This allows statistic multiplexing to improve bandwidth efficiency.Yet, should be noted that owing to the resource allocation on the different B LC that adjusts along with each BOC, the changes in data rate on each BLC is bigger.Statistic multiplexing also allows in-band signalling, and is provided at the BLC position in the next superframe.Reduce the recovery time that accesses terminal like this, and increased battery useful life.

Should be appreciated that the concrete order of the step in disclosed processing or the example that level is illustrative methods.Based on design reference, should be appreciated that the concrete order of the step in this processing or level can rearrange, and still remain in the disclosure scope.The key element that is presented of claimed each step according to exemplary sequence of attachment approach, and be not to mean to be confined to the concrete order or the level that are presented.

It will be appreciated by those skilled in the art that information and signal can use any various technology and method to represent.For example, data, instruction, order, information, signal, bit, symbol and the chip of mentioning in the whole text in above describing can be represented by voltage, electric current, electromagnetic wave, electromagnetic field or particle, light field or particle or its combination in any.

Those skilled in the art it shall yet further be noted that in conjunction with the described various illustrative logical blocks of embodiment disclosed herein, module, circuit and algorithm steps and can be implemented as electronic hardware, computer software or both combinations.For this interchangeability of hardware and software clearly is described, above various example components, piece, module, circuit and step are described with the form of its function prevailingly.This function is embodied as hardware and still is embodied as software, depends on the application-specific and the design constraint that put on whole system.At every kind of application-specific, those skilled in the art can realize described function with different modes, still this realization decision-making should be interpreted as to cause departing from the scope of the present disclosure.

Can realize or carry out with following parts in conjunction with the described illustrative logical blocks of embodiment disclosed herein, module and circuit: general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components or be designed for its combination in any that realizes function described here.General processor can be a microprocessor, but optionally, this processor can be any conventional processors, controller, microcontroller or state machine.Processor also can be implemented as the combination of computing equipment, and for example, the combination of DSP and microprocessor, a plurality of microprocessor, one or more microprocessor are in conjunction with DSP nuclear or any other this configuration.

In conjunction with the step of described method of embodiment disclosed herein and algorithm can directly be included in the hardware, in the software module of carrying out by processor or in the combination at both.Software module can reside in the storage medium of RAM memory, flash memory, ROM memory, eprom memory, eeprom memory, register, hard disk, displacement disc, CD-ROM or any other form well known in the art.Exemplary storage medium is coupled to processor, makes processor can from this storage medium, read information and to this storage medium writing information.Alternatively, storage medium can be integrated in the processor.Processor and storage medium can reside among the ASIC.ASIC can reside in the user terminal.Alternatively, processor and storage medium can be used as discrete parts and reside in the user terminal.

Preamble provides the description to disclosed embodiment, so that those skilled in the art can make or use the disclosure.Various modifications to these embodiment will be conspicuous to those skilled in the art, and the General Principle that limits here can be applied to other embodiment, and not depart from spirit or scope of the present disclosure.Therefore, the embodiment shown in the disclosure is not intended to be limited to here, but should meet and disclosed principle and the corresponding to maximum magnitude of novel features here.

Claims (5)

1, a kind of device that runs in the wireless communication system, described device comprises:

Be used for broadcasting stream is mapped to the module of BCMCS logic channel; And

Be used for sending on the broadcast physical channel collection module of described BCMCS logic channel, each channel that wherein said broadcast physical channel is concentrated is characterized uniquely by SIMT.

2, a kind of method that is used in the wireless communication system, described method comprises:

To broadcast stream and be mapped to the BCMCS logic channel; And

Send described BCMCS logic channel on the broadcast physical channel collection, each channel that wherein said broadcast physical channel is concentrated is characterized uniquely by SIMT.

3, a kind of electronic equipment is used to carry out method as claimed in claim 2.

4, a kind of machine readable media that comprises instruction when machine is carried out described instruction, causes described machine to carry out following operation, comprising:

To broadcast stream and be mapped to the BCMCS logic channel; And

Send described BCMCS logic channel on the broadcast physical channel collection, each channel that wherein said broadcast physical channel is concentrated is characterized uniquely by SIMT.

5, a kind of device that runs in the wireless communication system, described device comprises:

Processor is used for broadcasting stream is mapped to the BCMCS logic channel, and sends described BCMCS logic channel on the broadcast physical channel collection, and each channel that wherein said broadcast physical channel is concentrated is characterized uniquely by SIMT; And

Be coupled to the memory of described processor, to be used to store data.

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