CN1973507A - Method for transmitting and receiving broadcast service data in an ofdma wireless communication system - Google Patents
Method for transmitting and receiving broadcast service data in an ofdma wireless communication system Download PDFInfo
- Publication number
- CN1973507A CN1973507A CNA2005800210973A CN200580021097A CN1973507A CN 1973507 A CN1973507 A CN 1973507A CN A2005800210973 A CNA2005800210973 A CN A2005800210973A CN 200580021097 A CN200580021097 A CN 200580021097A CN 1973507 A CN1973507 A CN 1973507A
- Authority
- CN
- China
- Prior art keywords
- information
- broadcast service
- broadcast
- physical layer
- cid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2627—Modulators
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0071—Use of interleaving
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0008—Modulated-carrier systems arrangements for allowing a transmitter or receiver to use more than one type of modulation
Abstract
A method for providing two or more broadcast services in an orthogonal frequency division multiple access (OFDMA) wireless communication system. The method comprises the steps of separately receiving broadcast services to be transmitted, and independently performing coding, interleaving and modulation on the broadcast services according to a required quality for each of the broadcast services; segmenting each of the modulated broadcast signals into minimum transmission units; time-division-multiplexing the segmented broadcast service signals; configuring a frame comprising information on the broadcast service in physical layer transmission information transmitted together with the broadcast service; and transmitting the frame.
Description
Technical field
The present invention relates in general to the method that is used at wireless communication system transmission and receiving broadcast service data.Specifically, the present invention relates in OFDM (OFDMA) wireless communication system to send and the method for receiving broadcast service data.
Background technology
Cell mobile communication systems is typical wireless communication system.Mobile communication system uses multiple access scheme (multiple access scheme) to communicate by letter simultaneously with a plurality of users.Employed multiple access scheme generally includes time division multiple access (TDMA) scheme and code division multiple access (CDMA) scheme in mobile communication system.Along with developing rapidly of the communication technology, CDMA mobile communication system is from being used for mainly supporting the system evolution of Speech Communication for transmitting the system of HRPD (high rate packet data).
Yet, because limited code resource causes CDMA mobile communication system to be difficult to the multi-medium data that quantity forwarded increases day by day.Therefore, there is the demand that increases number of users and the data volume that increases is sent to user's multiple access scheme discerning.Being suggested the multiple access scheme that satisfies this demand is OFDM (OFDMA) scheme.The OFDMA scheme is discerned the user with a large amount of orthogonal sub-channels, and transmits data on orthogonal sub-channels.
For high-speed data transfer, proposed to use the cellular system (below be called " OFDMA cellular system ") of OFDMA scheme.Institute of Electrical and Electric Engineers (IEEE) the 802.16d standardization committee is carrying out the research to the OFDMA scheme, so that high speed wireless the Internet services to be provided.802.16 system's support is than the third generation (3G) the mobile communication system high-speed service of high data rate more, and use such as OFDM (OFDM) scheme delivery plan and in the 3G mobile communication system advanced antennas technology such as multiple-input and multiple-output (MIMO) antenna technology and intelligent antenna technology outside employed several physical-layer techniques implement high-speed service.
Yet traditional 802.16 high-speed radiocommunication systems send the data to independent mobile radio station based on clean culture, and in recent years, the technology that is used for transmitting with receiving broadcast service data that is tending towards being provided in the 3G mobile communication system is applied to 802.16 systems.
To be described in now wherein by downlink channel the process of in the current mobile communication system of broadcast service the broadcast service that sends from physical layer being handled will be provided.
Fig. 1 is illustrated in wherein the signaling diagram that the process of in the mobile communication system of broadcast service the broadcast service that sends from physical layer being handled is provided by downlink channel.
The hypothesis certain base station sends the broadcast service data that is used for broadcast service A and broadcast service B in Fig. 1.In this case, the common existence of broadcast service A and broadcast service B blended data 100 wherein is as the broadcast communication amount.In step 110, be used for the blended data 100 experience chnnel codings of two different broadcast service A and B.Afterwards, in step 120, channel encoded signals 102 experience that is used for these two different broadcast service interweaves and modulates.In step 130, the signal through interweaving and modulating 104 that will be used for these two different broadcast service by the process of transmitting that is used for broadcast service is mapped to transmitting channel.By this way, send the radio signal that is used for broadcast service A and B by transmitting channel 106a, 106b and 106c.Send radio signal based on each predetermined transmission unit.
When sending the mixing broadcast service data, said method may have following problem.First, because broadcast message A and broadcast message B are encoded together, so even mobile radio station is wanted one of receiving broadcasting information A and broadcast message B, it also must receive radio signal that is used for broadcast service A and the radio signal that is used for broadcast service B, then the radio signal that is received is decoded.The second, the transmitting time section that is used for the broadcast communication amount is too short, makes to be difficult to farthest improve the transmission performance by diversity service time (diversity).
Usually, the broadcast service uniaxially sends down link signal to a plurality of mobile radio stations.Therefore, broadcast service is seldom carried out downlink power control, and in order to overcome the radio channel of decline, the transmitting time section should be longer than the coherence time of radio channel to obtain the time enough diversity.Yet in this case, can not obtain the time enough diversity.2 is described with reference to the accompanying drawings.
Fig. 2 is used to describe channel fading and sends the timing diagram that concerns between the variation of data.Represent the downlink packets of sending from the base station based on the frame of transmitting element in each shown in the upper part of Fig. 2.Here, because broadcast service is described, so hypothesis grouping is as in conjunction with the described hybrid wireless signal of telecommunication that is used for different broadcast service of Fig. 1.Just, as shown in Figure 2, be sent in the hybrid wireless signal of telecommunication that all has different broadcast service in its each jointly with the order of i, i+1, i+2, i+3, i+4, i+5....In addition, the amplitude response characteristic 200 of supposing time dependent fading channel has the curve shown in the lower part of Fig. 2.212 (i+3) radio frames that sent have very high frame error probability from the time 210 to the time.Just, radio signal does not have the time enough diversity, has therefore damaged receptivity.
In other words, in Fig. 2, when (i+3) frame that transmits broadcast singal suffered the what is called " deep fade " of radio channel rapid variation owing to decline, the signal to noise ratio that is received was very low.As a result, the frame error probability of transmission broadcast singal is very high.Be the 3rd problem of the transfer approach of Fig. 1 below.Because together broadcast singal A and B are encoded with modulate, so can not allow them to have their unique performance.Just, suppose that broadcast message A is the information of broadcast service that is used for the integrity service zone of base station, and broadcast message B is the information that only is used for having in the whole coverage of base station the specific region of good sub-channel environment, then because broadcast message A and broadcast message B are encoded simultaneously and modulate, so can not make broadcast message A and B have their own unique performances with reference to Fig. 1 is described.
Summary of the invention
Therefore, the purpose of this invention is to provide that broadcast service data transmits and method of reseptance, provide unique performance for each broadcast service when different broadcast service can be provided at the same time.
Another object of the present invention provides that broadcast service data transmits and method of reseptance, is each broadcast service acquisition time diversity effect when different broadcast service can be provided at the same time.
A further object of the present invention provides broadcast service data and transmits and method of reseptance, can optionally receive the broadcast service data that the user wants.
According to an aspect of the present invention, be provided in OFDM (OFDMA) wireless communication system, providing two or multicast service method more.The method comprising the steps of: receive the broadcast service that will be transmitted independently, and according to the desired quality of each broadcast service broadcast service is carried out coding independently, interweaves and modulated; Each modulated broadcast singal is segmented into minimum transmission units; Time division multiplexing is through the broadcast service signal of segmentation; By in the physical layer transmission information that together transmits with broadcast service, comprising that the information about broadcast service disposes frame; With this frame of transmission.
According to another aspect of the present invention, be provided in wireless communication system, receiving the method for broadcast service, two or more broadcast service experience are used the time division multiplexing of OFDM (OFDMA) scheme in this wireless communication system, and comprise that the information about broadcast service of physical layer transmission information is used for a frame.The method comprising the steps of: receive at physical layer transmission information, and obtain information about described broadcast service by received physical layer transmission information being carried out the demodulation sign indicating number; In the delivery time of the broadcast service of from physical layer transmission information, being obtained, receiving broadcast service data in this frame; According to the scheme of from physical layer transmission information, being obtained the broadcast service data that is received is carried out demodulation and interweave, the data of institute's deinterleaving and another height that transmits based on the time-division are made up; With the data that made up are decoded.
Description of drawings
When in conjunction with the accompanying drawings, of the present invention above and other purposes, characteristics and advantage will from following detailed description, become more obvious, wherein:
Fig. 1 shows the signaling diagram of the process of in the mobile communication system that broadcast service is provided by down link the broadcast service that sends from physical layer being handled;
Fig. 2 is the timing diagram of the relation between the conversion that is used to be described in channel fading and transmit data;
Fig. 3 illustrates according to the embodiment of the present invention, produces the schematic diagram of process of the transmission signal of the information be used for two different broadcast service in mobile communication system;
Fig. 4 illustrates according to the embodiment of the present invention, the broadcast service signal is carried out receiving in the time-multiplexed mobile communication system schematic diagram of the process of needed broadcast message before being transmitted;
Fig. 5 illustrates the flow chart that transmits the process of broadcast service according to the embodiment of the present invention in the base station; With
Fig. 6 illustrates according to the embodiment of the present invention, in mobile radio station, receive based on the time branch broadcast service that transmits the flow chart of process.
In institute's drawings attached, represent identical or similar elements, characteristics and structure by identical Reference numeral.
Embodiment
Below, describe several embodiments of the present invention in detail with reference to accompanying drawing.In the following description, omitted the detailed description of the configuration that is combined known function therein for simplicity.
Fig. 3 illustrates according to the embodiment of the present invention, produces the schematic diagram of process of the transmission signal of the information be used for two different broadcast service in mobile communication system.With reference to Fig. 3, will describe in detail according to the embodiment of the present invention now, the process of different broadcast service is provided in mobile communication system.
According to the embodiment of the present invention, provide the base station of broadcast service to receive broadcast service independently and needn't handle broadcast service by mixing broadcasting.Fig. 3 shows the process that receives the independent grouping that is used for broadcast service A and broadcast service B by this way.After independent reception was used for the grouping of broadcast service A and broadcast service B, in step 310, the base station was carried out chnnel coding with the absolute coding scheme to broadcast service.Usually, defined channel coding schemes is used for chnnel coding in system.Yet the present invention is the restricting channel encoding scheme not.Alternatively, the present invention is characterised in that the data that are used for broadcast service is carried out chnnel coding independently.
After the grouping that is used for broadcast service A and the grouping that is used for broadcast service B were carried out chnnel coding independently, in step 320, the base station interweaved independently and modulates coded broadcast service packet.After finishing modulation, in step 330, the base station is segmented into 8 transmission units with each broadcast service packet.Here just suppose for example broadcast service packet is segmented into 8 transmission units.Yet the transmission unit quantity that broadcast service packet is segmented into can change.By this way, transmission unit is set to minimum transmission units.Therefore, according to the time of minimum transmission units, the size of obtainable data rate and/or the grouping of being modulated is determined the size of each segmentation in minimum transmission units.Alternatively, can will be divided into the segment applications of minimum transmission units in the step 330 in encoded signal or signal through interweaving.In this case, after the segmentation that is divided into minimum transmission units, use and interweave and modulated process.
After finishing segmentation, the base station is carried out multiplexing in step 340.Carry out the multiplexing feasible broadcast service signal that sequentially or in the given time transmits through segmentation.In Fig. 3, suppose only to provide two broadcast service, and two broadcast service transmit the data of same amount on the basis that replaces.Yet, will be understood by those skilled in the art that, under the situation that does not depart from scope of the present invention, can use any amount of broadcast service.For example, broadcast service can require the data volume that different quality or requirement increase.In this case, can transmit the data of the amount of an increase of broadcast service signal with the coupling recruitment.When transmitting three or more different broadcast service, sequentially transmit the informationization that is used for each broadcast service.And, in this case,, can one by one independently transmit broadcast service according to the desired quality of broadcast service or the data volume that will be transmitted.Just, in the special time period that once transmits another broadcast service, compare, can transmit special services in more times number ground (the more substantial broadcast message of user) with described another broadcast service.
Compare with the conventional method that transmits minimum transmission units in the broadcast service that has different amount data in transmission continuously, this novel method can come the acquisition time diversity by minimum transmission units is inserted in the different broadcast service.Described with reference to the situation that wherein transmits three broadcast service.
Suppose that per 4 minimum transmission units should transmit broadcast service A one time, per 2 minimum transmission units should transmit broadcast service B one time, and per 4 minimum transmission units should transmit broadcast service C one time.In this case, can transmit broadcast service with following order.
Example 1: broadcast service B → broadcast service A → broadcast service B → broadcast service C → broadcast service B → broadcast service A → ...
Example 2: broadcast service B → broadcast service C → broadcast service B → broadcast service A → broadcast service B → broadcast service C → ...
With reference to Fig. 3, with the traditional broadcast method of service delivery comparison of Fig. 1, the novel broadcast service transfer approach of this of Fig. 3 has following advantage.The first, because broadcast message A and broadcast message B carry out independently chnnel coding process,, and the radio signal that is received is decoded so mobile station transceiver can optionally receive the radio signal that is used for broadcast message A.The second, time-multiplexed because the radio signal that will be used for the radio signal of broadcast message A and be used for broadcast message B is carried out, so from the time diversity effect, this novel method is the twice of conventional method.The 3rd, because broadcast message A and broadcast message B experience individual interleaving and modulated process, so broadcast message A can be set and broadcast message B makes them have their unique data sequence and performances.
To be described gain below.Suppose to use 0.2 code rate and quadriphase PSK (QPSK) modulation scheme to transmit broadcast message A, and use 0.4 code rate and 16 quadrature amplitude modulation (16QAM) modulation scheme to transmit broadcast message B with the data rate of 400Kbps with the data rate of 100Kbps.In this case, broadcast message A can be with the zone of lower data rate service broad, and broadcast message B can be with the narrower zone of higher rate service.By this way, have benefited from the valid function of mobile communication system, can expansion service zone and broadcast service is provided with data rate independently.Broadcast message A and B can or comprise the diverse information of picture different TV channel and so on, perhaps comprise the information that has at the different images or the audio quality of identical information.Just, for a TV channel, the broadcast message that is used to provide normal picture and audio quality and creates and the broadcast message created and being used to provides hi-vision and audio quality experiences chnnel coding independently, interweaves and modulates.In this case, in having the zone of relatively poor radio channel-environment, even the broadcast message that the mobile radio station reception is created is so that also can receive the broadcast message with normal picture and audio quality under low signal to noise ratio (snr).In the zone with good radio channel-environment, mobile radio station receives the broadcast message of being created and have the broadcast message of hi-vision and audio quality so that only receive under high SNR.
Fig. 4 illustrates according to embodiment of the present invention, the broadcast service signal is carried out receiving in the time-multiplexed mobile communication system schematic diagram of the process of needed broadcast message before being transmitted.
In Fig. 4, suppose that the signal subsection that is used for broadcast service A and broadcast service B that the base station will have been carried out chnnel coding, interweaves and modulated is 8 minimum transmission units.In this case, want the selectively of mobile station ground of receiving broadcasting information A to receive the signal that is used for broadcast message A from having carried out signal time-multiplexed, that be used for broadcast message A and broadcast message B as illustrated in fig. 4, all signals that produced are encoded, interweave and modulated to the combination same channel, and the signal that is made up is carried out receiving course.To be described in greater detail below.
When delivery time during multiplexing radio signals 400, mobile radio station only optionally receives the transmission unit frame that it needs.Just, in step 410, selectively of mobile station ground only extracts its needed broadcast singal.In step 420, the needed broadcast message frame that the mobile radio station combination is received.In step 430, the signal that mobile radio station demodulation sign indicating number is made up, thus receive needed broadcast service A.
Use description to transmit the method for broadcast service and identification broadcast packe below.
In order to support broadcast service, provide the high-speed radiocommunication system of clean culture should be able to determine whether the physical layer frame that sends from the base station comprises whether broadcast packe and specific cluster are broadcast packe.So far, the base station is notified to mobile radio station by control information with delivery time of each broadcast packe, perhaps in the physical layer frame that transmits corresponding grouping by it, write and comprise broadcast message, and broadcast this information, thereby indication transmits the physical layer frame of broadcast service thereon.
As the method that is used to discern broadcast service packet, 802.16 systems that embodiments of the present invention are applied to it can use such method: (CID) distributes to broadcast service with unique connection identifier (CID, and before transmitting, the broadcast message that will have its CID is written in each and transmits in physical layer transmission information (DL-MAP) part included in the frame.The mobile radio station that receives particular frame receives the physical layer transmission information of corresponding frame, and determines whether the CID corresponding with its needed broadcast service is included in the received physical layer transmission information.If the CID corresponding with its needed broadcast service is included in the received physical layer transmission information, then mobile radio station can receive needed broadcast service by subchannel and the symbol that transmits corresponding CID thereon.
The form of physical layer transmission information has been shown in the table 1 below.
Table 1
| Grammer | Size |
| DL-MAP_IE(){ DIUC If(DIUC＝＝15){ Extended IDUC dependent IE }else{ if(INC_CID＝＝1){ N_CID for(n＝0；n＜N；n++){ CID } } OFDMA Symbol Offset Subchannel Offset Boosting | Variable 8 bits of 4 bits 16 bits 10 |
| No.OFDMA Symbols No.Subchannel } } | 9 bits, 5 bits |
Table 1 shows the form of employed general physical layer transmission information in 802.16 systems.As the field of normally used transport-type in indication 802.16 systems, downlink interval is used the downlink transmission type of code (DIUC) field indication specified channel in physical layer transmission information.Whether the indication of INC_CID field comprises CID in corresponding physical layer transmission information.The N_CID field is indicated CID quantity included in corresponding physical layer transmission information.CID field indication is by the CID of the data that transmitted in the indicated frame of physical layer transmission information.The indication of OFDMA Symbol Offset field transmits the starting point of the OFDMA symbol of corresponding data in frame.The indication of Subchannel Offset field transmits the starting point of the channel of corresponding data.The quantity of No.Subchannel field indication subchannel.The indication of Boosting field is used to transmit the secondary power level of corresponding data.
Method as the point of the broadcast service packet that is used for indicating physical layer frame, embodiments of the present invention have presented such method: definition is used for the broadcast physical layer that the information that the broadcasting outside the physical layer transmission information is correlated with writes is wherein transmitted information (broadcasting DL-MAP), and comprises broadcast physical layer transmission information.For example, when the DIUC field in the field of physical layer transmission information is set to 15, can comprises broadcast physical layer transmission information, and its form has been shown in table 2.
Table 2
| Grammer | Size |
| Braodcast_DL-MAP_IE{ Extended DIUC Length For(i＝0；i＜N_CID；i++){ CID SPID OFDMA Symbol offset Subchannel Offset NO.OFDMA Symbols No. |
4 |
| } |
Fig. 2 shows according to the embodiment of the present invention, the form of the broadcast physical layer of redetermination transmission information in 802.16 systems.In the form of broadcast physical layer transmission information, Extended DIUC field is the designator that is used for indicating the broadcast physical layer transmission information of various expansion physical layer transmission information.Therefore, the mobile radio station that receives the physical layer transmission information that has DIUC=15 can be discerned the physical layer transmission information that comprises expansion in the physical layer transmission information.Mobile radio station reads Extended DIUC field from the physical layer transmission information of expansion, and if its value is and the corresponding designator of broadcast physical layer transmission information, then mobile radio station can be a broadcast message with the expansion physical layer transmission information analysis of correspondence.
The size of the broadcast physical layer transmission information that the Length field indication in broadcast physical layer transmission information is included.The quantity of the broadcasting CID that the indication of N_CID field is included can be determined its value from the value of length field.The broadcast physical layer transport packet is drawn together the information about N_CID broadcasting CID.The indication of CID field is used for being identified at the CID of the included broadcast service of corresponding broadcast physical layer transmission information.OFDMASymbol Offset field is indicated the character position in the frame that transmits the broadcast message that has corresponding broadcasting CID thereon, and the indication of NO.OFDMA Symbols field is in how many corresponding broadcast messages of correspondence position transmission.The indication of Subchannel Offset field transmits the starting point of the frequency domain channel of the broadcast message that has corresponding broadcasting CID, and how many channels the indication of No.Subchannel field begins to take in the channel in correspondence.DIUC field indication in 802.16 systems the transport-type of popular use.
The SPID field was indicated before being transmitted, when a broadcast packe being segmented into several transmission units or son grouping, and the sub-packet identifier (SPID) of included correspondence broadcasting CID in present frame.If a broadcast packe is segmented into 8 son groupings, and transmit as the 3rd son being grouped in the present frame as described in reference Fig. 3, the SPID field of then corresponding broadcasting CID has value 2, and the SPID that first son divides into groups has value 0.Receive the mobile radio station of the broadcasting grouping of the SPID=2 that has corresponding CID, by will before received CID be that the grouping of 0 and 1 son is grouped in current received son and makes up on the code rank, determine whether it has successfully received broadcast message.Defined in the present invention broadcast physical layer transmission information is provided for indicating the information that whether comprises broadcast message in the frame that is transmitted in 802.16 systems, the method for recognin grouping when also being provided for transmitting particular broadcast service on time division basis.
The summary form of the broadcast physical layer transmission information (broadcasting DL-MAP) that is provided in the embodiments of the present invention has been shown in the table 3.
Table 3
| Grammer | Size |
| Braodcast_DL-MAP_IE{ |
| Extended DIUC Length For(i＝0；i＜N_CID；i++){ CID SPID ACID AISN OFDMA Symbol Offset Subchannel Offset NO.OFDMA Symbols No.Subchannel DIUC } | 4 bits, 4 bits, 16 bits, 4 bits (perhaps employed 2 bits), 2 bits, 1 bit, 8 bits, 6 bits, 7 bits, 6 bits, 4 bits |
Table 3 shows outside the form of table 2, also comprises the popularization form of the broadcast physical layer transmission information of ARQ Channel Identifier (ACID) field and ARQ identifier serial number (AISN) field.ACID field indication in the identical broadcast service that CID identified the quantity of the broadcast packe that can transmit continuously.In the broadcast service that identical CID identified, if do not have the ACID field in broadcast physical layer transmission information, then next broadcast packe can not be transmitted till it transmits all son groupings that broadcast packe obtained by one of time-division in the base station.If be divided into son grouping and transmit the son grouping continuously in the time of will belonging to two broadcast packe of a broadcasting CID, the mobile radio station that then receives this son grouping can not determine which two broadcast packe the grouping that is received belongs to.Therefore, the broadcast packe that can use the ACID field to identify continuously or side by side transmit, and the mobile radio station broadcasting grouping that can use ACID to discern continuously or receive simultaneously.
Suppose when each of the broadcast packe 1 that will belong to a broadcasting CID and 2 all is segmented into 4 son grouping 1-1,1-2,1-3,1-4 and 2-1,2-2,2-3,2-4 respectively, before being transmitted, to be set to 0 with the divide into groups ACID of the corresponding broadcast physical layer transmission information of 1-1,1-2,1-3,1-4 of son, and before being transmitted, will be set to 1 with the divide into groups ACID of 2-1,2-2, broadcast physical layer information that 2-3,2-4 are corresponding of son.
Receive the mobile radio station of son grouping with the order of 1-1,2-1,2-2,1-2,1-3,2-3,2-4,1-4, can discern the first son grouping is the son grouping that has at the SPID=0 of ACID=0, and the second son grouping is the son grouping that has at the SPID=0 of ACID=1.The mobile radio station that receives the son grouping continuously will make up with the son that identical ACID transmitted, thereby improves receptivity.By using ACID, before being transmitted, can be mixed for the different broadcast packe of a broadcast service, thus maximization time-division effect.
The AISN field indication order information of the broadcast packe of corresponding A CID transmission.When the broadcast packe that transmits with corresponding ACID had changed, the base station changed the value of AISN field.If the AISN field changes to 1 or 0 from 0 or 1, change order information, then mobile radio station can be determined to change with the broadcast packe that corresponding ACID transmits, and empty and ACID corresponding cache device, and the sub-packet memory that will be used for next broadcast packe is at buffer.By using AISN, even before all scheduled broadcast groupings are transmitted in the base station, it also can transmit next broadcast packe, thereby guarantees that flexible and variable broadcast message transmits.
Embodiments of the present invention use physical layer to transmit outside the method for son grouping that information and broadcast physical layer transmit the broadcast packe that information transmitted being used to discern, and also are provided at will broadcast CID before the transmission and broadcasting SPID is included in as the method in mixed automatic repeat request (HARQ) message of media interviews controls (MAC) layer information.And embodiments of the present invention provide mobile radio station to use about the message pick-up broadcast packe of this message and discern the method for its SPID.
Table 4 shows the form of defined HARQ message in 802.16 systems.The base station is based on broadcasting the message shown in the transmission table 4 HARQ information is sent to the mobile radio station of supporting HARQ.Therefore, support the mobile radio station of HARQ to be received in HARQ message included in the physical layer frame that is transmitted, and determine whether its oneself CID is included in wherein.If its oneself CID is included in wherein, then mobile radio station determines that corresponding HARQ instance information is its oneself reception information.HARQ that mobile radio station uses this information to receive and transmitted divides into groups.
Table 4
| Grammer | Size |
| HARQ-MAP message format(){ H-ARQ MAP Indicator＝111 H-ARQ_UL-MAP appended CRC appended MAP message length DL IE count for(i＝0；i＜DL IE count；I++) Compact DL-MAP IE() } if(H-ARQ_UL-MAP appended＝＝1){ while(map data remains){ | 3 bits, 1 bit, 1 bit, 9 bits, 6 bits are variable |
| Compact UL-MAP IE() } } if(！byte boundary){ Padding nibble } } |
In the message of table 4, H-ARQ MAP indicator field is that to be used to indicate this information be the message indicator of HARQ message, and H-ARQ MAP Indicator=111 indication HARQ message.The indication of H-ARQ_UL-MAP appended field comprises also that outside down link transmission information up link transmits information, and when H-ARQ_UL-MAP appended field was set to 1, the information that uplink HARQ is relevant was included in this message.CRC appended field indication HARQ message together transmits with the 32 bit CRC that are used for this message.If CRC appended field is set to 1, then transmit HARQ message and the 32 bit CRC that add its end to together.The length of MAP message length field indication HARQ message, and when HARQ message and CRC were together transmitted, MAP messagelength field was indicated the length of the length that comprises CRC.How many HARQ message elements (IE) indication of DL IE count field comprised before being transmitted.HARQ message comprises the Compact DL-MAP IE (ul transmissions information) that the indicated value of DL IE count is so much.If the H-ARQ_UL-MAP appended field of HARQ message is set to 1, then Compact DL-MAP (downlink transmission information) is included in the remainder of this message.
Downlink transmission information (Compact DL-MAP) can be represented various types of downlink HARQ information.Embodiments of the present invention are provided for using the expanded downstream link transmission information of downlink transmission information to transmit the method for broadcast packe information, and the form of the downlink transmission information of expansion has been shown in the table 5.
Table 5
| Grammer | Size |
| Compact_DL-MAP_IE{ DL-MAP Type＝7 DL-MAP |
3 bits, 5 bits, 4 bits are variable |
| } |
Table 5 shows the form of expanded downstream link transmission information.In expanded downstream link transmission information, the DL-MAP the type field is to be used in reference to be shown in the designator that downlink transmission information included in the HARQ message is expansion transmission information, and DL-MAP Type=7 indication expanded downstream link transmission information.The type of DL-MAP sub-type field indication expanded downstream link transmission information, and in 802.16 standards keeps all values and needn't the similar types of expanded downstream link transmission information be defined.The length of Length field indication expanded downstream link transmission information, and the expanded downstream link transmission block of information with designated length is included in the Payload field.
In embodiments of the present invention, will have the downlink transmission time diversity information TimeDiversity_MBS_DL-MAP of the expanded downstream link transmission information definition of DL-MAP sub-type=0 for the transmission information of expression broadcast packe.Below table 6 show the form of defined in the present invention downlink transmission time diversity information.Downlink transmission time diversity information comprises N_CID broadcast packe transmission message elements, and can determine the value of N_CIP according to Length field specified in expanded downstream link transmission information.The CID of the broadcast packe that the CID field indication of downlink transmission time diversity information is included, and Subchannel Offset field is indicated the position in the frame that transmits the broadcast message that has corresponding CID.N as employed indication coding techniques and modulating/demodulating technology in 802.16 systems
EPCode field and N
SCHCode field, indication are used to transmit the coding techniques and the modulating/demodulating technology of corresponding broadcasting grouping.Have and top SPID, ACID and AI_SN field with reference to table 2 and described those synonymous of table 3, indication is used for the SPID of each broadcasting grouping respectively, transmits the ID and the ARQ serial number of the ARQ channel of son grouping thereon.
Table 6
| Grammer | Size |
| TimeDiversity_MBS_DL-MAP_IE{ for(i＝0；i＜N_CID；i++){ CID Subchannel Offset NEP code NSCH code AI_SN SPID ACID | 16 bits, 12 bits, 4 bits, 4 bits, 1 bit, 2 bits, 4 bits |
| Reserved } } | 5 bits |
When receiving specific physical layer frame, support HARQ and the mobile radio station of wanting to receive broadcast service should determine whether comprise HARQ message in this frame.If comprise HARQ message in this frame, then mobile radio station use included downlink transmission time diversity information in HARQ message determines whether to comprise the CID of its needed broadcast service.If comprise the CID of its needed broadcast service, then mobile radio station can use specified coding and modulation/demodulation methods, at assigned address, uses and CID time corresponding diversity information, receives the broadcasting grouping corresponding with SPID.
Describe now according to the embodiment of the present invention the base station and mobile radio station between performed control procedure.Here hypothesis is used for broadcast physical layer transmission information with the simplification form of table 2.
Fig. 5 illustrates according to the embodiment of the present invention, transmits the process of broadcast service in the base station.With reference to Fig. 5, the process of transmission broadcast service in the base station will be described according to the embodiment of the present invention.
Fig. 5 shows according to the embodiment of the present invention, is used for producing independently and transmitting for broadcast logical channel on the basis of every frame the exemplary operations of the base station of broadcasting grouping.In 802.16 systems that embodiments of the present invention are applied to wherein, suppose to comprise a broadcast logical channel with a broadcast data that CID transmitted.
With reference to Fig. 5, in step 510, caching is carried out according to logic channel the broadcast data that every frame was arrived is stored in the buffer in the base station.Afterwards, the transmission set-up procedure of base station all broadcast logical channel execution in step 502 to 532 that this base station is transmitted.After carrying out caching, the base station determines that in step 502 specific broadcast logical channel #j must transmit at frame #i.If determine that frame #i is not the transmission time of broadcast logical channel #j, then the base station advances to next broadcast service or turns back to the step 500 that it continues broadcast service is carried out caching.
If determine that in step 502 frame #i is the transmission time of broadcast logical channel #j, then the base station is determined to transmit the son grouping before whether it has transmitted all that are used for corresponding broadcast logical channel in step 504.Whether the SPID by determining corresponding broadcast logical channel is that MAX_SPID carries out this and determines.Just, the base station is by checking whether SPID=MAX_SPID becomes Rob Roy to determine it transmits the son grouping before whether having transmitted.If its son grouping before definite its of step 504 transmitted all that are used for corresponding broadcast logical channel, then the transmission of next broadcast packe is prepared to be used in the base station by step 506 to 514.
In step 506, channel coding method, deinterleaving method and the modulator approach of the next broadcast packe that the base station is identified in the buffer being stored.In step 508, the base station is applied to corresponding broadcast packe with determined method, that is, use the method for determining that corresponding broadcast packe is carried out chnnel coding, interweaves and modulated.Afterwards, in step 510, the broadcast packe that encode channel, interweave and modulate the base station is segmented into the son grouping of predetermined quantity.In the present embodiment, broadcast service experiences described with reference to Figure 3 chnnel coding independently, interweaves and modulates.In step 512, the base station is set to 0 with the SPID of the broadcast logical channel of correspondence.Afterwards, in step 514, the first son grouping in the base station selected son grouping that produces.Alternatively, the generation of step 510 neutron grouping can be applied to code signal or coding/interleaved signal.In this case, after producing the son grouping, can use and interweave and modulate.
After step 506 to 514, the base station is at the selected broadcasting grouping time of implementation and the channel multiplexing of step 530 pair pre-position.In step 532, the base station will be drawn together in the physical layer transmission information that will transmit in frame #i about the broadcast physical layer transport packet of the broadcast logical channel #j of correspondence.This is multiplexing and described multiplexing identical with reference to Fig. 3.
If determine that in step 504 base station does not also have transmission to be used for all broadcasting groupings of corresponding broadcast logical channel #j, then the base station is in the SPID increase by 1 of step 520 with corresponding broadcast logical channel.In step 522, the base station selected son corresponding with the SPID that is increased grouping advances to step 530 then.
In step 532, the base station advances to step 534, if wherein exist the unicast data and the present frame #i that will be transmitted to have the space that is used to transmit in present frame #i, then add the unicast data of correspondence in the broadcast data to the base station, carries out multiplexing.Afterwards, the base station is included in multiplexing information and broadcast message in the physical layer transmission information, thereby finishes the frame #i that comprises physical layer transmission information.In step 536, the frame of being finished, terminal procedure are then transmitted in the base station.
Subsequently, the process that receives broadcast frame in the mobile radio station will be described in.
Fig. 6 illustrates according to the embodiment of the present invention, the process of the broadcast service that is received on the time division basis in mobile radio station to be transmitted.With reference to Fig. 6, will describe according to the embodiment of the present invention the process of the broadcast service data that in mobile radio station, is received on the time division basis to be transmitted in detail.
As above said, in 802.16 systems on applying the present invention to it, suppose to comprise a broadcast logical channel with a broadcast data that CID transmitted.
With reference to Fig. 6,, receive the mobile radio station reception physical layer transmission information of frame #i and the broadcast physical layer that in frame, comprises at the fixed time and transmit information, and the information that is received is decoded in step 600.Obtain the physical layer transmission information that comprises broadcast physical layer transmission information by this process, the CID that mobile radio station can obtain the form of present frame, transmitted and about the information of its transmission point in frame.After obtaining this information, mobile radio station determines whether to be included in step 602 wants received broadcast logical channel among the frame #i.
If determine to comprise needed broadcast logical channel in the frame #i that is transmitted in step 602, then mobile radio station is to all included in this frame needed broadcast logical channel execution in step 604 to 620.To describe each step in detail below.
In step 604, mobile radio station receives the son grouping of (perhaps carrying out demodulation interweaves) place, the position transmission of needed broadcast logical channel #j in frame according to the information that is write in the broadcast physical layer transmission information that is used for needed broadcast logical channel #j.After the son grouping that receives broadcast logical channel #j, mobile radio station is analyzed the SPID that broadcasts the son grouping by the broadcast physical layer transmission correspondence that information transmitted in step 606.Afterwards, mobile radio station determines whether this son grouping is the first son grouping of broadcast packe.If should son grouping be not the first son grouping, then mobile radio station step 608 carry out with the reception buffer that is used for counterlogic channel #j store before the code level anabolic process of son grouping.Yet if the grouping of corresponding son is the first son grouping, mobile radio station empties the reception buffer that is used for broadcast logical channel #j in step 609.Afterwards, in step 610, first son grouping that the mobile radio station decoding is received or the grouping of making up through code level, thus reconfigure the original broadcast grouping.
After this reconfigured, mobile radio station was carried out crc check in the broadcast packe of step 612 pair through reconfiguring.According to the crc check result, mobile radio station determines whether successfully to have received corresponding grouping.If determine not exist crc error in step 612, then mobile radio station is sent to the upper strata in step 614 with the broadcast packe of correspondence.In step 620, mobile radio station empties the reception buffer that is used for as the broadcast logical channel #j of the logic channel that is used for corresponding broadcast packe.
Whether then, if determine to exist crc error in step 612, then mobile radio station compares SPID and MAX_SPID in step 616, be last son grouping to determine corresponding broadcasting grouping.If the grouping of corresponding broadcasting is not last son grouping, then the mobile radio station packet memory that will receive in step 618 is at the reception buffer that is used for corresponding broadcast logical channel #j.Otherwise if determine that in step 616 the son grouping that receives is last son grouping, then mobile radio station empties the reception buffer that is used for corresponding broadcast logical channel #j in step 620, determines no longer to transmit the son grouping of corresponding broadcast packe.Can whether have maximum by the SPID that determines to receive and be implemented in whether performed settled really preceding son grouping is the method that last son divides into groups in the step 616.Though use SPID in embodiments of the present invention,, as mentioned above, can also use the variation of AISN number.Alternatively, can use them both.
After all included needed broadcast packe were handled in to frame #i, mobile radio station advanced to step 622, and it handles the unicast data in the broadcast service of correspondence therein, finishes the operation in frame #i then.
As from top description, can understanding, provide 802.16 wireless communication systems of broadcast service can obtain the time diversity effect that is used for each broadcast service, thereby improve receptivity.In addition, by the independent broadcast service that transmits, can provide the various quality of broadcast service, and mobile radio station can optionally receive its needed broadcast service.
Though illustrate and described the present invention with reference to its specific implementations, even but the common personnel of this area should be appreciated that, under situation about not departing from, can carry out the various changes on form and the details by the defined the spirit and scope of the present invention of claims.
Claims (22)
1. one kind is used for providing two or multicast service method more at OFDM (OFDMA) wireless communication system, and the method comprising the steps of:
Receive the broadcast service that will be transmitted independently, and broadcast service is carried out coding independently, interweaves and modulated according to the desired quality of each broadcast service;
Each modulated broadcast singal is segmented into minimum transmission units;
Time division multiplexing is through the broadcast service signal of segmentation; And
By in the physical layer transmission information that together transmits with broadcast service, comprising that the information about broadcast service disposes frame; With this frame of transmission.
2. method according to claim 1, wherein, the information in physical layer transmission information about broadcast service comprise about indication about the expanded downstream link of the information of broadcast service use at interval code (DIUC) information, be used for the connection identifier (CID (CID) of each broadcast service that transmits, the starting point of transmission point, symbol quantity, frequency domain channel and the quantity of shared subchannel in the frame broadcast service corresponding with each CID.
3. method according to claim 2, wherein, the information about broadcast service in physical layer transmission information also comprises the information about the length of the broadcast physical layer transmission information of the quantity of indication broadcasting CID.
4. method according to claim 2, wherein, the information about broadcast service in physical layer transmission information also comprises the information of the sub-packet identifier (SPID) of the broadcasting CID that indication is transmitted when a broadcast packe is segmented into several transmission unit.
5. method according to claim 2, wherein, the information about broadcast service in physical layer transmission information comprises that also indication can be at ARQ Channel Identifier (ACID) information of the quantity of the broadcast packe that is transmitted continuously by the broadcast service that identical CID identified.
6. method according to claim 5 comprises also whether indication exists ARQ identifier serial number (ASIN) information of any variation in the broadcast packe that ACID transmitted.
7. method according to claim 2, wherein, if wireless communication system is supported mixed automatic repeat request (HARQ), then the information about broadcast service in physical layer transmission information also comprises information and the error correction code that indicates whether to use HARQ.
8. method according to claim 7 also comprises the ul transmissions information of the transmission of indicating up-link information.
9. method according to claim 7, wherein, use expanded downstream link transmission information is transmitted in the information about broadcast service in the physical layer transmission information.
10. method according to claim 9, wherein, expanded downstream link transmission information also comprises downlink transmission time diversity information.
11. method according to claim 10, wherein, expanded downstream link transmission information comprises the information about coding method and modulation/demodulation methods and downlink transmission time diversity.
12. method that is used for receiving broadcast service at wireless communication system, two or more broadcast service experience are used the time division multiplexing of OFDM (OFDMA) scheme in this wireless communication system, and transmit the information about broadcast service that comprises in the physical layer transmission information at a frame, the method comprising the steps of:
The physical layer transmission information of received frame, and obtain information about described broadcast service by received physical layer transmission information being carried out the demodulation sign indicating number;
In the delivery time of the broadcast service of from physical layer transmission information, being obtained, receiving broadcast service data in this frame; And
According to the transmission plan that is obtained from physical layer transmission information the broadcast service data that is received being carried out demodulation interweaves, to make up with another height that transmits based on the time-division through the data of deinterleaving, and the data that made up are decoded.
13. method according to claim 12 also comprises step:
If the physical layer transmission information that is received comprises the information of the sub-packet identifier (SPDI) of indication broadcasting connection identifier (CID (CID), and the initial reception of SPID indication, then initial storage is used for the grouping of needed broadcast service;
If SPID indicates non-initial reception, then code level with son grouping with before the son stored make up, and the son that storage is made up divides into groups; With
The encoded grouping that decoding is made up.
14. method according to claim 13 also comprises step:
Can be if transmit indication at ARQ Channel Identifier (ACID) information of the quantity of the broadcast packe that transmits continuously by the broadcast service that identical CID identified, then according to ACID message pick-up grouped data by physical layer transmission information; With
According to the ARQ identifier serial number (AISN) of indication, determine to receive new broadcast packe with the variation in the broadcast packe of ACID transmission.
15. the method that a plurality of broadcast service are provided in OFDM (OFDMA) wireless communication system, the method comprising the steps of:
Independently the data that are used for broadcast service are encoded;
Encoded broadcast service data is segmented into a plurality of son groupings;
At each broadcast service, produce and to comprise that indication is used for the information of the connection identifier (CID (CID) of identification of broadcast service, is used to the broadcast physical layer transmission information of the position that identifies the Sub-Packet ID (SPID) of son grouping and transmit the son grouping; With
Configuration comprises in broadcast physical layer transmission information and the son grouping corresponding with broadcast physical layer transmission information the frame of at least one, and transmits this frame.
16. method according to claim 15, wherein, physical layer transmission information comprises the information of number of sub-channels shared in the starting point of transmission point about the broadcast service corresponding with each CID, symbol quantity, frequency domain channel and the frame.
17. method according to claim 16, wherein, in physical layer transmission information, comprise also that about the information of broadcast service indication can be at ARQ Channel Identifier (ACID) information of the quantity of the broadcast packe that is transmitted continuously by the broadcast service that identical CID identified.
18. method according to claim 17 comprises also whether indication exists ARQ identifier serial number (ASIN) information of any variation in the broadcast packe that transmits with ACID.
19. method that in wireless communication system, receives broadcast service, in this wireless communication system, use the various location of orthogonal frequency (OFDMA) scheme that two or more broadcast service are provided, and transmit the information that comprises physical layer transmission information about broadcast service at frame, the method comprising the steps of:
At each broadcast service, from physical layer transmission information included frame, obtain the connection identifier (CID (CID) that is used for the identification of broadcast service, the position that is used to identify the Sub-Packet ID (SPID) of son grouping and transmits the son grouping;
The information that use is obtained is extracted the son grouping that is used for needed broadcast service from frame; With
The son grouping that decoding is extracted.
20. method according to claim 19, wherein, from information about the quantity of the starting point of the transmission point of the broadcast service corresponding, symbol quantity, frequency domain channel and shared subchannel with each CID, be broadcast service included in the physical layer transmission information, obtain about transmitting the positional information of son grouping.
21. method according to claim 19 also comprises step:
If in physical layer transmission information, comprise ARQ Channel Identifier (ACID) information of indication by the continuous transmission of the broadcast service that identical CID identified, then from ACID information, obtain about the information of quantity of the broadcast packe that transmits continuously; With
Extract the son grouping of the broadcast packe that the user obtained and the grouping that decoding is extracted.
22. method according to claim 21 also comprises step:
If transmit broadcast packe continuously, then from physical layer transmission information, obtain whether indication exists any variation in broadcast packe ARQ identifier serial number (AISN) information with ACID information; With
Change if in AISN information, exist, then detect the variation in the broadcast packe.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20040048569 | 2004-06-25 | ||
| KR1020040048569 | 2004-06-25 | ||
| KR10-2004-0048569 | 2004-06-25 | ||
| KR1020040053214 | 2004-07-08 | ||
| KR1020040053214A KR100891783B1 (en) | 2004-06-25 | 2004-07-08 | Method for transmitting and receiving data of broadcast service in a wireless communication system usign ofdma |
| KR10-2004-0053214 | 2004-07-08 | ||
| PCT/KR2005/001994 WO2006001671A1 (en) | 2004-06-25 | 2005-06-25 | Method for transmitting and receiving broadcast service data in an ofdma wireless communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1973507A true CN1973507A (en) | 2007-05-30 |
| CN1973507B CN1973507B (en) | 2010-11-10 |
Family
ID=37294761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005800210973A Expired - Fee Related CN1973507B (en) | 2004-06-25 | 2005-06-25 | Method for transmitting and receiving broadcast service data in an ofdma wireless communication system |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100891783B1 (en) |
| CN (1) | CN1973507B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102273300A (en) * | 2009-01-09 | 2011-12-07 | 日本电气株式会社 | multiple component carrier OFDMA communication system |
| CN103701579A (en) * | 2009-04-24 | 2014-04-02 | 瑞典爱立信有限公司 | Uplink radio resource allocation in the presence of power limited users |
| CN101904125B (en) * | 2007-11-09 | 2015-02-04 | 中兴通讯美国公司 | Flexible OFDM/OFDMA frame structure for communication systems |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101067921B1 (en) * | 2006-06-16 | 2011-09-26 | 콸콤 인코포레이티드 | Progressively broadcasting information in beacon signals |
| US8976727B2 (en) * | 2006-10-22 | 2015-03-10 | Viasat, Inc. | Cyclical obstruction communication system |
| KR101388794B1 (en) * | 2008-03-03 | 2014-04-23 | 삼성전자주식회사 | Method and apparatus for transmitting/receiving in-band signal information in wireless broadcasting system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3576787B2 (en) | 1998-01-22 | 2004-10-13 | 株式会社東芝 | OFDM signal transmitting / receiving method, OFDM signal transmitting / receiving apparatus, OFDM signal transmitting method, and OFDM signal transmitting apparatus |
| US7573807B1 (en) | 1999-09-17 | 2009-08-11 | Alcatel-Lucent Usa Inc. | Method and apparatus for performing differential modulation over frequency in an orthogonal frequency division multiplexing (OFDM) communication system |
| US20020154705A1 (en) * | 2000-03-22 | 2002-10-24 | Walton Jay R. | High efficiency high performance communications system employing multi-carrier modulation |
| JP2002228923A (en) * | 2001-02-07 | 2002-08-14 | Nippon Sheet Glass Co Ltd | Image-forming optical device |
| KR100920738B1 (en) * | 2002-10-19 | 2009-10-07 | 삼성전자주식회사 | Apparatus and method for transmission of digital broadcasting system having different error correction coding process according to communication environment |
-
2004
- 2004-07-08 KR KR1020040053214A patent/KR100891783B1/en not_active IP Right Cessation
-
2005
- 2005-06-25 CN CN2005800210973A patent/CN1973507B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101904125B (en) * | 2007-11-09 | 2015-02-04 | 中兴通讯美国公司 | Flexible OFDM/OFDMA frame structure for communication systems |
| CN102273300A (en) * | 2009-01-09 | 2011-12-07 | 日本电气株式会社 | multiple component carrier OFDMA communication system |
| CN102273300B (en) * | 2009-01-09 | 2015-07-01 | 联想创新有限公司（香港) | Multiple component carrier OFDMA communication system |
| US10084574B2 (en) | 2009-01-09 | 2018-09-25 | Lenovo Innovations Limited (Hong Kong) | Multiple component carrier OFDMA communication system |
| CN103701579A (en) * | 2009-04-24 | 2014-04-02 | 瑞典爱立信有限公司 | Uplink radio resource allocation in the presence of power limited users |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1973507B (en) | 2010-11-10 |
| KR100891783B1 (en) | 2009-04-07 |
| KR20050123017A (en) | 2005-12-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7751305B2 (en) | Method for transmitting and receiving broadcast service data in an OFDMA wireless communication system | |
| US11197295B2 (en) | Systems and methods for OFDM channelization | |
| US9832775B2 (en) | Communication resource allocation systems and methods | |
| CN101103600B (en) | Method and system for indicating data burst allocation in a wireless communication system | |
| RU2327290C2 (en) | Device and method of common control data receiving and transmitting in wireless communications system | |
| AU2006241023B2 (en) | Method for transmitting/receiving data in a communication system | |
| US20050201325A1 (en) | Method for operation of HARQ in a broadband wireless access communication system | |
| EP1677460A1 (en) | System and method for providing services using a single frequency in a wireless communication system | |
| US20060101168A1 (en) | Apparatus and method for allocating data bursts in a broadband wireless communication system | |
| KR20100048496A (en) | Device and method for controlling downlink control information in wireless communication system | |
| JP2014042284A (en) | Device for radio resource allocation method at control channel in radio communication system | |
| JP2011524694A (en) | Method and system for sticky area allocation in an OFDMA communication system | |
| US20200351876A1 (en) | Apparatus and method for transmitting/receiving of data in wireless communication system | |
| CN101199142B (en) | Apparatus and method for transmitting/receiving broadcast data in a mobile communication system | |
| CN1973507B (en) | Method for transmitting and receiving broadcast service data in an ofdma wireless communication system | |
| CN115209372A (en) | Method and apparatus in a node used for wireless communication | |
| CN102316070A (en) | Data transmission method and device, and data processing method and device | |
| KR20080050730A (en) | Apparatus and method for transmitting/receving multicast and broadcast service map message in broadband wireless communication system | |
| CN109039554B (en) | Method and device in user equipment and base station used for narrow-band communication | |
| KR101380330B1 (en) | Apparatus and method for static resource allocation in broadband wireless communication system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101110 Termination date: 20210625 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |