CN102082651B - Method for realizing mixed automatic retransmission in relay station-including communication system - Google Patents
Method for realizing mixed automatic retransmission in relay station-including communication system Download PDFInfo
- Publication number
- CN102082651B CN102082651B CN 201110031102 CN201110031102A CN102082651B CN 102082651 B CN102082651 B CN 102082651B CN 201110031102 CN201110031102 CN 201110031102 CN 201110031102 A CN201110031102 A CN 201110031102A CN 102082651 B CN102082651 B CN 102082651B
- Authority
- CN
- China
- Prior art keywords
- data block
- base station
- terminal
- relay station
- sends
- 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.)
- Active
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a method for realizing mixed automatic retransmission in a relay station-including communication system. The method comprises the following steps that: a terminal or a base station sends data blocks to an opposite terminal by a relay station, the relay station returns the receiving state of the data block to the sending terminal after the transmission is completed, and the sending terminal determines whether the data blocks are needed for retransmission according to the receiving state. The method has the advantages of realizing the mixed automatic retransmission in the relay station-including communication system, improving the system performance, and improving the transmission quality; in addition, the method simultaneously realizes the transparency of the relay station to the terminal, and the existing terminals do not need to be changed in the relay station-including communication system, and the system is ensured to be compatible to the traditional terminals.
Description
Technical field
The present invention relates to the mixed automatic retransfer technology, particularly a kind of method that in containing the communication system of relay station, realizes mixed automatic retransfer.
Background technology
WiMAX system (WiMAX) is a kind of broadband wireless access (BWA) technology, and it is eated dishes without rice or wine based on IEEE 802.16 agreements.Orthogonal frequency division multiplexing multiple access (OFDMA) mode is because its distinctive superiority, and the WiMAX system has namely adopted a kind of as its multi-address method of OFDMA.802.16 the physical frame structure under the time division duplex of stipulating in the agreement (TDD) the pattern OFDMA mode as shown in Figure 1, the WiMAX system namely adopts this frame structure, wherein, (a) be the base station frame, (b) be terminals frames, the oblique line filling part is emission state, is accepting state without filling part.The base station frame is comprised of descending sub frame and sub-frame of uplink, and descending sub frame is used for sending downlink data, and sub-frame of uplink is used for receiving upstream data.TTG is that the base station is converted to accepting state elapsed time interval from emission state, and RTG is for being converted to the time interval of emission state from accepting state; To be terminal be converted to time interval of emission state from accepting state to SSRTG, and SSTTG is that terminal is converted to accepting state elapsed time interval from emission state.Logical sub-channel represents that one sub-channels is made of some subcarriers by the subchannel sequence number of logical order arrangement.The terminal synchronizes sequence be used for the terminal searching network and and base station synchronization, the terminal frame head is used to indicate time-frequency resource allocating information, the frame originating point information that end-on is received is deciphered and is namely known oneself wherefrom receive data and where send data.The base station sends data at descending sub frame, and at the sub-frame of uplink receive data, and terminal sends data at the descending sub frame receive data at sub-frame of uplink.Where each terminal specifically receives and send data is indicated by the terminal frame head.
Adopted mixed automatic retransfer (HARQ) technology in the WiMAX system, HARQ is a kind of feedback retransmission mechanism of bottom, and HARQ can retransmit in physical layer.Transmitting terminal adds cyclic redundancy check (CRC) (CRC) data with the data block that needs send, through after the transmission, receiving terminal to the data block decoding after, data block is carried out CRC calculates, can judge according to result of calculation whether data block is correctly received.Receiving terminal can feed back accepting state to transmitting terminal in the moment of appointment, transmitting terminal retransmits data block according to the receiving terminal feedack, receiving terminal can carry out diversity to data retransmission in physical layer and merge, therefore, data make mistakes and retransmit after can obtain simultaneously power gain and diversity gain, can effectively resist channel fading.HARQ is a kind of stop-and-wait protocol, and after namely transmitting terminal sent a data block, receiving terminal must feed back the reception situation of this data block in fixing time delay.
802.16 agreement regulation sends to the descending HARQ data block of terminal for the base station, corresponding terminal must send feedback information to the base station in the HARQ feedback areas of the frame of regulation.The HARQ feedback areas is made of some HARQ feedback subchannels, the subchannel of terminal transmission feedback information need to be corresponding with the numbering of descending HARQ data block, as shown in Figure 2, wherein, indicating 0,1 and 2 oval-shaped oblique line filling part is the HARQ data block, and indicating 0,1 and 2 square oblique line filling part is the HARQ feedback information.Among the figure, send to the HARQ data block 0,1 and 2 of terminal in the descending sub frame base station of i frame, behind the j frame, i.e. i+j frame, terminal sends feedback information 0,1 and 2 at the corresponding subchannel of the HARQ of sub-frame of uplink feedback areas, feedback information represents for confirming (ACK) or denying (NACK) whether this data block is correctly received.
Send to the ascending HARQ data of base station for terminal, then send the HARQ feedback message by the base station at the frame of regulation, this message is broadcast, comprise a bitmap (Bitmap) in the broadcast, each bit of bitmap represents the transmission state of the ascending HARQ data block of relevant position, then terminal knows just according to the corresponding bits of bitmap whether the ascending HARQ data block that this terminal sends is correctly received by the base station by receiving this broadcast.The transmission of ascending HARQ and feedback procedure as shown in Figure 3, wherein, indicating 0,1 or 2 oval-shaped oblique line filling part is the HARQ data block, the grid filling part is the HARQ feedback message.Several terminals send ascending HARQ data block 0,1 and 2 at the sub-frame of uplink of i frame to the base station, through behind the j frame, i.e. i+j frame, the base station sends the HARQ feedback message, terminal is decoded to feedback message, knows just whether the ascending HARQ data block of its transmission is correctly received by the base station.Comprise following two territories in the HARQ feedback message: bitmap lengths and bitmap territory.Wherein bitmap lengths represents the byte number that bitmap takies, and k bit of bitmap represents the accepting state of k ascending HARQ data block.
In wireless communication system, owing to electromagnetic path attenuation or building such as block at the reason, so that some local wireless communication signals intensity is lower, the communication quality that is positioned at these regional portable terminals is very poor; Along with growing to the broadband wireless communications demand of people, demand to wireless bandwidth becomes increasing, cause more and more higher carrier frequency to be used in the new agreement and system, yet, owing to the increase of radio wave attenuation along with frequency increases, high carrier frequency must be faced with the problem of high decay, and this has also further limited the coverage of base station.In order to solve the covering problem of base station, usually need to adopt relay station that the wireless communication signals between base station and the travelling carriage is strengthened.Without the need for line transmission, only communicate by Radio Link between relay station and the base station, it is low therefore to have a cost of arranging net, and disposes simple advantage.Contain the wireless communication system architecture of relay station as shown in Figure 4, relay station is positioned at the coverage of base station, provides relay services for being in the outer terminal of base station range, so that be in the signal that the outer terminal of base station range also can receive the base station.Among Fig. 4, the base station can't directly cover travelling carriage 2 and travelling carriage 3, but can be respectively forwarding by relaying 1 and relaying 2 realize covering.
But in 802.16 agreements, be not included in the mixed automatic retransfer process that how to realize behind the introducing relay station in the WiMAX system between base station and the terminal.
Summary of the invention
The object of the present invention is to provide a kind of method that realizes mixed automatic retransfer in containing the communication system of relay station, the communication system based on tdd mode and OFDMA mode that is used for after introducing relay station realizes mixed automatic retransfer.
For achieving the above object, the invention provides a kind of method that in containing the communication system of relay station, realizes mixed automatic retransfer, carry out following steps:
Terminal or base station send to the opposite end by relay station with data block, and described relay station returns to transmitting terminal with the accepting state of described data block after being sent completely, and transmitting terminal determines whether that according to described accepting state needs retransmit described data block.
The method is specifically carried out following steps:
Step a, base station send to the data block to terminal to be sent the relay station of described terminal attaching in the relaying descending sub frame;
After step b, described relay station receive described data block, be in the running time-frequency resource of described terminal distribution in described base station, by the terminal descending sub frame described data block be transmitted to described terminal;
The data block that step c, described end-on are received is deciphered and verification, according to check results, sends feedback information at the mixed automatic retransfer subchannel;
Steps d, described relay station be according to described feedback information, and self receive the state information of described data block from the base station, sends new feedback information to described base station;
Decipher described new feedback information step e, described base station, and the data block that makes a mistake in the transport process is processed in different ways.
Described step b is specially:
Step b1, described base station are in the process of the described data block of described relay station demodulation, it is described terminal distribution running time-frequency resource in the terminal frame head, and inform the parameter of the described data block of described terminal, this parameter comprises type, sequence number and the modulation system of the mixed automatic retransfer request of described data block;
Described data block that step b2, described relay station have judged whether correct reception and demodulation if so, then sends to described terminal with described data block in described running time-frequency resource; Otherwise do not send data block to terminal;
Step b3, described terminal are deciphered described terminal frame head, and in distributing to the running time-frequency resource of self the receive data piece.
Described step c is specially:
The data block that described end-on is received is deciphered and verification, judges whether described data block has passed through verification, if so, and feedback acknowledgment information in the mixed automatic retransfer subchannel then; Otherwise feedback unacknowledged information.
Described steps d is specially:
The mode of steps d 2, employing bitmap is encoded to the accepting state of described data block;
Described steps d 2 is specially:
Described relay station arranges two bitmaps, and the described terminal of record is to the accepting state of described data block in the first bitmap, and the described relay station of record is to the accepting state of described data block in the second bitmap.
Described relay station arranges two bitmaps and specifically carries out following steps:
Described relay station records described terminal to the accepting state of described data block in described the first bitmap, for the data block that described terminal does not correctly receive, described relay station records the accepting state of its data block that described terminal is not correctly received in described the second bitmap.
Relay station is that the correctness that data block receives arranges three kinds of states, be respectively: this data block by described terminal correctly receive, this data block do not receive and this data block is received but correctly do not received by described terminal by described relay station is correct by described relay station is correct, described step e is concrete to carry out following flow process:
Decipher described new feedback information step e1, described base station, judges whether described data block is correctly received by terminal, if so, then finishes the processing for this data block; Otherwise execution in step e2;
Step e2, judge whether described data block is correctly received by described relay station, if so, execution in step e4 then; Otherwise execution in step e3;
Step e3, described base station generate the data block that needs to retransmit to described relay station, execution in step a;
Step e4, described base station are that described terminal distribution running time-frequency resource sends to described terminal for the data block that described relay station will need to retransmit, provide the parameter of this re-transmitting data block when distributing running time-frequency resource, this parameter comprises type, sequence number and the modulation system of the mixed automatic retransfer request of described re-transmitting data block;
Step e5, described relay station are in the running time-frequency resource of described terminal distribution in described base station, by the downstream station subframe described re-transmitting data block are transmitted to described terminal, and execution in step c.
The method also can be carried out following steps:
Step a ', base station send the data block parameter message to terminal;
Step b ', described terminal be according to described parameter, sends data block in described base station is the uplink time/frequency source of described terminal distribution, and described relay station receives described data block at corresponding running time-frequency resource;
Step c ', described relay station send the accepting state message for described data block to described base station, and the data block that receives is transmitted to described base station;
Steps d ', described base station sends to described terminal with the content of described accepting state message, and controls described terminal or described relay station retransmits the data block of makeing mistakes.
Described step a ' is specially:
The base station sends the data block parameter message by relay station to terminal.
Described step c ' is specially:
After step c1 ', described relay station are finished reception to described data block, send the accepting state message for described data block to described base station;
If the described relay station of step c2 ' correctly receives described data block, then in the uplink time/frequency source of its distribution described data block is transmitted to described base station in described base station; Otherwise execution in step d '.
Described steps d ' be specially:
Steps d 1 ', the described base station data block that judges whether to exist needs to be retransmitted by described terminal according to described accepting state message, if so, execution in step a ' then; Otherwise execution in step d2 ';
Steps d 2 ', described base station judges whether the data block that exists needs to be retransmitted by described relay station according to self data block reception situation, if, then described base station distributes uplink time/frequency source for described relay station, and to its parameter message that sends the data block that need retransmit, be used for described relay station and retransmit described data block; Otherwise finish.
The present invention adopts the physical frame structure based on tdd mode and OFDMA mode, by relay station the data block that terminal or base station send is forwarded to the opposite end, relay station returns to transmitting terminal with the accepting state of data block after being sent completely, transmitting terminal determines whether that according to accepting state needs retransmit data block, and at relay station or retransmit at transmitting terminal, thereby realized in containing the communication system of relay station, realizing mixed automatic retransfer, improve the performance of system, improved transmission quality; The present invention is also by consulting data retransmission between base station and the relay station, do not need the participation of terminal, terminal is unaware of the data transmission state between base station and the relay station fully, realized the transparency of relay station to terminal, so that in the system that introduces relay station, need not change existing terminal, guarantee the compatibility of system to conventional terminal.
Description of drawings
Fig. 1 is the physical frame structure chart under the time division duplex in 802.16 agreements (TDD) the pattern OFDMA mode in the background technology;
Fig. 2 is HARQ feedback areas schematic diagram in the background technology;
Fig. 3 is transmission and the feedback system schematic diagram of ascending HARQ in the background technology;
Fig. 4 is the structure chart that contains the wireless communication system of relay station in the background technology;
Fig. 5 is the physical frame structure chart of a kind of base station, relay station and terminal in the embodiments of the invention;
Fig. 6 is the physical frame structure chart of another kind of base station, relay station and terminal in the embodiments of the invention;
Fig. 7 is the method flow diagram that passes through relay station converting downlink HARQ data block in the embodiments of the invention;
Fig. 8 be in the embodiments of the invention relay station to the structure chart of the message format of base station feedback;
Fig. 9 is descending HARQ data block State Encoding Style schematic diagram in the embodiments of the invention;
Figure 10 is the method flow diagram of transmitting the ascending HARQ data block in the embodiments of the invention by relay station;
Figure 11 is the structure chart of the message format of ascending HARQ data block accepting state message in the embodiments of the invention.
Embodiment
In the present invention, the employing time division duplex (TDD) of similar 802.16 agreements and the HARQ process of communication system after introducing relay station of OFDMA mode have been realized.
Introduce after the relay station, the physical frame structure of base station, relay station and terminal can be as shown in Figure 5, also can be as shown in Figure 6, wherein, the oblique line filling part is emission state, is accepting state without filling part, be idle condition in the dotted line frame, the grid filling part is next frame terminal frame head.The base station frame comprises terminal descending sub frame, relaying descending sub frame, terminal sub-frame of uplink and relaying sub-frame of uplink four parts.Wherein terminal descending sub frame and terminal sub-frame of uplink are used for the base station provides service for the terminal in its coverage, and relaying descending sub frame and relaying sub-frame of uplink are used to the relay station of this base station administration that service is provided.Corresponding with the base station frame, relay station frame also is divided into four parts, provide service at terminal descending sub frame and terminal sub-frame of uplink for the terminal in this relay station compass of competency, in the relaying descending sub frame, receive the data from the base station, in the relaying sub-frame of uplink, send data to the base station.Relay station obtains the time-frequency resource allocating information of relaying descending sub frame and relaying sub-frame of uplink by receiving the relaying frame head.Terminal obtains synchronously by terminal synchronizes sequence and base station or relay station, obtain the time-frequency resource allocating information of oneself by the receiving terminal frame head, only provide the time-frequency resource allocating information of terminal descending sub frame and terminal sub-frame of uplink in the terminal frame head, therefore only receive data in the terminal descending sub frame, send data in the terminal sub-frame of uplink, terminal is not worked in time slot corresponding to relaying descending sub frame and relaying sub-frame of uplink.Clear area among Fig. 5 just is used for expression relay station and base station and uses orthogonally running time-frequency resource, and in fact running time-frequency resource can be divided arbitrarily, as long as guarantee orthogonality.
The something in common of Fig. 5 and two kinds of frame structures shown in Figure 6 is that base station and relay station all are unifiedly to be provided by the terminal frame head in the time-frequency resource allocating of terminal descending sub frame and terminal sub-frame of uplink.Even in frame structure shown in Figure 6, although also transmitting terminal frame head of relay station, the information of its transmission and base station are on all four, and the terminal frame head that relay station sends must send to it by the base station in previous frame.The purpose of doing like this is to guarantee relay station to the transparency of terminal, and the terminal frame head that terminal receives is the stack of base station and relay station transmitted signal, but terminal be can't see the existence of relay station.
The essential distinction of frame structure shown in Figure 5 and frame structure shown in Figure 6 is in the first frame structure that relay station is transmitting terminal synchronizing sequence and terminal frame head not; And relay station transmitting terminal synchronizing sequence and terminal frame head in the second frame structure.
At the terminal descending sub frame, when terminal was in accepting state, relay station was in emission state; At the terminal sub-frame of uplink, when terminal was in emission state, relay station was in accepting state.
In the present invention, terminal or base station are forwarded to the opposite end by relay station with data block, relay station returns to transmitting terminal with the accepting state of data block after being sent completely, transmitting terminal determines whether that according to accepting state needs retransmit data block, and at relay station or retransmit in the opposite end, thereby realized in containing the communication system of relay station, realizing mixed automatic retransfer.Here, the base station or the terminal that send data block are called transmitting terminal, and the destination of receive data piece is called the opposite end.
Fig. 7 is the method flow diagram that passes through relay station converting downlink HARQ data block in the embodiments of the invention, specifically carries out following steps:
Step 101, base station send to the HARQ data block to terminal to be sent the relay station of this terminal attaching in the relaying descending sub frame;
Step 102, base station are the terminal distribution running time-frequency resource in the terminal frame head, this running time-frequency resource is used for relay station and transmits this data block, and inform the parameter of this data block of terminal, this parameter comprises HARQ type, sequence number and the modulation system of data block, and terminal can directly be received relevant HARQ data block running time-frequency resource that the base station sends or that transmit by relay station and the message of parameter.
HARQ data block that step 103, relay station have judged whether correct reception and demodulation if so, then sends to terminal by the terminal descending sub frame with data block in the running time-frequency resource of base station assigns; Otherwise do not send data block.
Step 104, terminal are deciphered the terminal frame head, and in distributing to the running time-frequency resource of self the receive data piece.
Step 105, terminal are deciphered and verification the HARQ data block that receives according to parameter information, judge whether this data block has passed through verification, if so, and feedback acknowledgment (ACK) information in the HARQ subchannel then; Otherwise feed back non-affirmation (NAK) information.
If this HARQ data block is the data that retransmit, then terminal need to merge to obtain diversity gain with the data of re-transmission and the data of its buffer memory before decoding.
Step 106, relay station are according to feedback information, and self receives the state information of HARQ data block from the base station, three kinds of status indication data blocks are set, and three kinds of states are respectively: this data block is correctly received (ACK), this data block and is not correctly received (NAK) and this data block by relay station and received but correctly do not received (RACK) by terminal by relay station is correct by terminal.
The mode of step 107, employing bitmap is encoded to the state of HARQ data block: because the state of data block has three kinds, generally speaking, need to adopt two bits that it is encoded, in the larger situation of feedback quantity, this coded system takies more bandwidth, the present invention adopts the mode encode in two steps, can reduce feedback quantity, and relay station to the message format of base station feedback as shown in Figure 8.Wherein the type of message territory is used for the type of this message of sign, to distinguish with other message; Bitmap 1 length field represents the length of bitmap 1, and its unit can be byte number, also can be bit number; Bitmap 1 territory is used for feedback terminal to the accepting state of HARQ data block, be ACK or NAK, k bit of bitmap represents that k HARQ data block that this relay station is responsible for transmitting is in the accepting state of terminal, such as representing ACK with binary one, binary zero represents NAK or opposite, if represent correct reception with binary one, binary zero represents correctly not receive, and then the value of k bit of bitmap equals relay station and receives the feedback states step-by-step that the state of k HARQ data block and terminal receive after this data block from the base station and carry out AND operation; If represent correctly not receive with binary one, represent correctly not receive with binary zero, then its value equals the accepting state of relay station and the step-by-step inclusive-OR operation of terminal feedback state." bitmap 2 " territory is used for representing the accepting state of the HARQ data block that the NAK bit among relay station contraposition Fig. 1 is corresponding.
Message format shown in Figure 8 comprises above several at least, but is not limited to this, such as increasing the total length of a territory for this message of sign.The expression mode of bitmap also is not limited in this in addition, only need can identification data block accepting state get final product.
The below illustrates the coded system of bitmap 1 and bitmap 2.As shown in Figure 9, represent correct accepting state with binary one among the figure, represent non-correct accepting state with binary zero.The accepting state of relay station shows that mistake has occured its 8th and the 16th HARQ data block that receives from the base station, and the feedback states of terminal shows not correct reception of the 4th, 8,11 and 12 HARQ data block.Then relay station carries out the step-by-step AND operation according to these two state tables, obtains bitmap 1=(1110111011001110)
2, wherein " ()
2" the expression binary number, if represent correct accepting state with binary zero herein, represent that with binary one non-correct accepting state then is the step-by-step inclusive-OR operation.Bitmap 2 then equals the accepting state of data block corresponding to 0 bit among expression relay station contraposition Fig. 1, equaling 0 bit in the bitmap 1 is the 4th, 8,11,12 and 16, can obtain bitmap 2=(10110) according to relay station to the accepting state of the HARQ data block of these correspondences
2For the 16th HARQ data block, although it is ACK that relay station is deciphered the result who obtains to terminal feedback information, but because relay station itself does not just correctly receive this data block, therefore relay station thinks that its decoding to the terminal feedback channel is insecure, on the base station, give the correct time, this HARQ data block is still fed back the NAK state.After HARQ data block state feedback message from relay station is received in the base station, just can judge the delivery status of each HARQ data block in conjunction with the bitmap 1 in the message and bitmap 2 territories.
Step 108, relay station are encapsulated in bitmap in the message shown in Figure 8, and this message is sent to the base station.
Decipher this message step 109, base station, judges whether the state of HARQ data block is ACK, if so, then shows this data block by the correct terminal that sent to, finishes the processing for this data block; Otherwise execution in step 110.
Step 110, judge whether the state of this data block is NAK, if so, show that then this data block mistake has occured, execution in step 111 in the base station sends the process of relay station to; Otherwise show that this data block has correctly been sent to relay station by the base station, but in relay station sends the process of terminal to, mistake has occured, execution in step 112.
Step 112, base station are that the terminal distribution running time-frequency resource sends to terminal for the data block that relay station will need to retransmit, provide the parameter of this re-transmitting data block when distributing running time-frequency resource, this parameter comprises HARQ type, sequence number and the modulation system of re-transmitting data block.
Step 113, relay station are in the running time-frequency resource of terminal distribution in the base station, by the downstream station subframe re-transmitting data block are transmitted to terminal, and execution in step 104.
In above flow process, for frame structure shown in Figure 5, terminal can directly receive the time-frequency resource allocating information that the base station sends, and therefore, the relay station that is applied to is not in this case transmitted the terminal frame head; And for frame structure shown in Figure 6, the base station sends identical terminal frame head simultaneously with relay station, the terminal frame head that relay station sends sends to it by the base station in the relaying descending sub frame of previous frame, because this step only just needs to carry out in the second frame format, therefore in above flow process, do not write out this step, but do not represent that this step can omit.
Figure 10 is the method flow diagram of transmitting the ascending HARQ data block in the embodiments of the invention by relay station, specifically carries out following steps:
Step 201, base station have been terminal distribution in terminal frame head uplink time/frequency source, this running time-frequency resource are used for terminal and send the HARQ data block.The parameter of relevant this HARQ data block of terminal is informed in the base station, and this parameter comprises HARQ type, sequence number and the modulation system of data block.For frame structure shown in Figure 6, base station and relay station send the message of time-frequency resource allocating message and HARQ data block parameter simultaneously.
Step 202, terminal are given in the running time-frequency resource of oneself to relay station transmission HARQ data block in base station assigns by the terminal sub-frame of uplink according to the data block parameter.
Step 203, relay station are informed its accepting state to this HARQ data block of base station by ascending HARQ data block accepting state message after receiving the HARQ data block of terminal transmission.This message format comprises the accepting state of all ascending HARQ data blocks that relay station receives in same number of frames as shown in figure 11 in this message, wherein this message of type of message domain identifier is ascending HARQ accepting state message; The length in bitmap lengths domain representation bitmap territory both can be take byte as unit, also can be bitwise; K the bit in bitmap territory represents that relay station is responsible for the accepting state of k HARQ data block receiving, can be with binary zero represent to take defeat (NAK), represent correct reception (ACK) with binary one, perhaps represent to take defeat (NAK) with binary one, represent correct reception (ACK) with binary zero.
If step 204 relay station has correctly received the HARQ data block that terminal sends, be in the uplink time/frequency source of its distribution this HARQ data block to be transmitted to the base station with the base station then; Otherwise do not send data block;
The ascending HARQ data block accepting state message that step 205, base station send according to relay station, generation need to send to the ascending HARQ data block accepting state message of terminal, then this accepting state message is sent to terminal.The content of this message is identical with the content of the ascending HARQ data block accepting state message that relay station sends, but message format can be different, and this is because owing to the agreement of transmit leg and recipient in two kinds of situations can difference.The send mode of this accepting state message depends on concrete system, can send at the HARQ of special use feedback channel, also can will be summarised in the feedback information of all ascending HARQ data blocks in the message by broadcast, adopt the mode of bitmap to send, use the accepting state of the corresponding HARQ data block of each bit representation of bitmap.
Step 206, base station judge whether to exist needs by the HARQ data block of terminal re-transmission according to its ascending HARQ data block accepting state message that receives, and if so, then execution in step 201; Otherwise execution in step 207.
Terminal receives HARQ data block accepting state message, if receive the confirmation (ACK) information, just think that data block has correctly arrived receiving terminal; If receive non-affirmation (NAK) information, just think that the data block of its transmission does not correctly arrive receiving terminal.In fact, in the present invention, even terminal is received confirmation, show just that also its data that send have correctly arrived relay station, whether these data correctly have been transmitted to the base station then not necessarily, if data correctly are not transmitted to the base station, then retransmit this part data by the negotiation between base station and the relay station, terminal is unaware of the data transmission state between base station and the relay station fully, and the purpose of doing like this is to guarantee that relay station is to the transparency of terminal.
Step 207, base station judge whether to exist needs by the HARQ data block of relay station re-transmission according to the HARQ data block reception situation of self, if, then uplink time/frequency source is distributed to relay station in the base station, and to its parameter message that sends the HARQ data block that need retransmit, be used for relay station and retransmit the HARQ data block; Otherwise finish.
In above flow process, step 203 and step 204 do not have sequencing carrying out, and relay station also can first forwarding data, sends ascending HARQ data block accepting state message to the base station again.
By the present invention, can make relay system support the HARQ transmission, improve systematic function; And do not change existing terminal, guarantee the compatibility to conventional terminal.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not break away from the spirit and scope of technical solution of the present invention.
Claims (13)
1. method that realizes mixed automatic retransfer in containing the communication system of relay station is characterized in that the method comprises:
The base station sends the data block parameter to terminal;
Described base station receives the accepting state message that relay station sends, described accepting state message receives the backward described base station transmission of data block that described terminal sends by described relay station, the data block that described relay station receives, is sent in described base station is the uplink time/frequency source of described terminal distribution according to described data block parameter by described terminal; And receiving the described data block that described relay station sends, the described data block that described relay station sends is sent when correctly receiving the described data block that described terminal sends by described relay station;
Described base station sends content in the described accepting state message to described terminal, and when described relay station did not correctly receive the described data block that described terminal sends, described base station was controlled described terminal the data block of makeing mistakes is retransmitted; When described base station did not correctly receive the described data block of described relay station transmission, described base station was controlled described relay station the data block of makeing mistakes is retransmitted.
2. method according to claim 1 is characterized in that, the described terminal of described control retransmits the data block of makeing mistakes and comprises:
Described base station judges whether to exist needs by the data block of described terminal re-transmission according to described accepting state message, need to be by the data block of described terminal re-transmission if exist, and described base station resends the data block parameter to described terminal.
3. method according to claim 1 is characterized in that, the described relay station of described control retransmits the data block of makeing mistakes and comprises:
The data block that does not exist needs to be retransmitted by described terminal is judged in described base station according to described accepting state message, and the data block reception situation according to self is judged the data block that exists needs to be retransmitted by described relay station, described base station distributes uplink time/frequency source for described relay station, and sends the parameter message of the data block that needs re-transmission to described relay station.
4. arbitrary described method is characterized in that according to claim 1-3, and described base station sends the data block parameter to terminal, comprising:
Described base station sends described data block parameter by described relay station to described terminal.
5. method that realizes mixed automatic retransfer in containing the communication system of relay station is characterized in that the method comprises:
Terminal is obtained the data block parameter that the base station sends;
Described terminal is according to described data block parameter, sends data block in described base station is the uplink time/frequency source of described terminal distribution;
Described terminal receives the content of the accepting state message of described base station transmission, described accepting state message is to send to described base station after receiving the data block that described terminal sends by relay station, if the data block that described terminal sends is correctly received by described relay station, described data block is given described base station by described relay station;
If the data block that described terminal sends is not correctly received by described relay station, described terminal retransmits the data block of makeing mistakes under the control of described base station.
6. method according to claim 5 is characterized in that, described terminal retransmits the data block of makeing mistakes under the control of described base station and comprises:
Described terminal is obtained the data block parameter that described base station resends, and the data block parameter that described base station resends is judged according to described accepting state message by described base station and sent when having the data block that needs retransmit by described terminal;
Described terminal is according to the described data block parameter that resends, and is re-transmitting data block in the uplink time/frequency source of described terminal distribution in described base station.
7. according to claim 5 or 6 described methods, it is characterized in that described terminal is obtained the data block parameter that the base station sends and comprised: described terminal receives described base station by the described data block parameter of described relay station transmission.
8. method that realizes mixed automatic retransfer in containing the communication system of relay station is characterized in that the method comprises:
The data block that the relay station receiving terminal sends, the data block parameter that described data block is sent according to the base station by described terminal sends in described base station is the uplink time/frequency source of described terminal distribution;
Described relay station sends the accepting state message for described data block to described base station, the content in the described accepting state message is sent to described terminal by described base station;
When described relay station correctly receives described data block, the data block that receives is transmitted to described base station;
Described relay station retransmits the data block of makeing mistakes according to the control of described base station.
9. method according to claim 8 is characterized in that, described relay station retransmits the data block of makeing mistakes according to the control of described base station and comprises:
Described relay station receives the parameter message of the data block that needs that described base station sends retransmit, the parameter message of the described data block that need to retransmit is judged the data block that does not exist the needs terminal to retransmit by described base station according to described accepting state message, and sends after judging the data block that exists needs to be retransmitted by described relay station according to the data block reception situation of self;
Described relay station is to retransmit described data block in the described relay station uplink time/frequency source of distributing in described base station.
10. according to claim 8 or 9 described methods, it is characterized in that described method also comprises:
Described relay station receives the data block parameter that described base station sends, and described data block parameter is sent to described terminal.
11. a base station is characterized in that, described base station comprises:
Be used for sending to terminal the unit of data block parameter;
The unit that is used for the accepting state message of reception relay station transmission, described accepting state message receives the backward described base station transmission of data block that described terminal sends by described relay station, the data block that described relay station receives, is sent in described base station is the uplink time/frequency source of described terminal distribution according to described data block parameter by described terminal;
Be used for receiving the unit of the described data block that described relay station sends, the described data block that described relay station sends is sent when correctly receiving the described data block that described terminal sends by described relay station;
Be used for sending to described terminal the unit of the content of described accepting state message; And,
Be used for when described relay station does not correctly receive the described data block of described terminal transmission, controlling the data cell that described terminal retransmits the data block of makeing mistakes; And, when described base station does not correctly receive the described data block of described relay station transmission, control the data cell that described relay station retransmits the data block of makeing mistakes.
12. a terminal is characterized in that, described terminal comprises:
Unit for the data block parameter of obtaining the base station transmission;
Be used for according to described data block parameter, in described base station is the uplink time/frequency source of described terminal distribution, send the unit of data block;
Be used for receiving the unit of the content of the accepting state message that described base station sends, described accepting state message is to send to described base station after receiving the data block that described terminal sends by relay station, if the data block that described terminal sends is correctly received by described relay station, described data block is given described base station by described relay station; And,
Be used for when the data block of described terminal transmission is not correctly received by described relay station the unit that under the control of described base station, the data block of makeing mistakes is retransmitted.
13. a relay station is characterized in that, described relay station comprises:
The unit that is used for the data block that receiving terminal sends, the data block parameter that described data block is sent according to the base station by described terminal sends in described base station is the uplink time/frequency source of described terminal distribution;
Be used for to the unit of described base station transmission for the accepting state message of described data block, the content in the described accepting state message is sent to described terminal by described base station;
Be used for when described relay station correctly receives described data block, the data block that receives being transmitted to the unit of described base station; And,
Be used for the unit that the control according to described base station retransmits the data block of makeing mistakes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110031102 CN102082651B (en) | 2006-06-22 | 2006-06-22 | Method for realizing mixed automatic retransmission in relay station-including communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110031102 CN102082651B (en) | 2006-06-22 | 2006-06-22 | Method for realizing mixed automatic retransmission in relay station-including communication system |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100900373A Division CN101047431B (en) | 2006-06-22 | 2006-06-22 | Method for implementing mixed automatic retransmit in communication system containing repeater station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102082651A CN102082651A (en) | 2011-06-01 |
| CN102082651B true CN102082651B (en) | 2013-01-30 |
Family
ID=44088411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110031102 Active CN102082651B (en) | 2006-06-22 | 2006-06-22 | Method for realizing mixed automatic retransmission in relay station-including communication system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102082651B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103580817B (en) * | 2012-07-30 | 2016-12-21 | 中国移动通信集团公司 | A kind of data transmission method, device, system and relevant device |
| CN102868514B (en) * | 2012-08-30 | 2015-09-16 | 北京久华信信息技术有限公司 | A kind of tdd communication systems radio transmitting method |
| CN105050111B (en) * | 2015-06-15 | 2018-05-18 | 上海斐讯数据通信技术有限公司 | A kind of access point is to the method and system of server reporting terminal access state |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003069837A1 (en) * | 2002-02-15 | 2003-08-21 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and arrangement for retransmission of packets in the base station sub-system |
| CN1541466A (en) * | 2001-06-30 | 2004-10-27 | ��˹��ŵ�� | Appts. and method for delivery of packets in multi-hop wireless networks |
| WO2006024320A1 (en) * | 2004-08-31 | 2006-03-09 | Telefonaktiebolaget Lm Ericsson (Publ) | Data unit sender and data unit relay device |
-
2006
- 2006-06-22 CN CN 201110031102 patent/CN102082651B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1541466A (en) * | 2001-06-30 | 2004-10-27 | ��˹��ŵ�� | Appts. and method for delivery of packets in multi-hop wireless networks |
| WO2003069837A1 (en) * | 2002-02-15 | 2003-08-21 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and arrangement for retransmission of packets in the base station sub-system |
| WO2006024320A1 (en) * | 2004-08-31 | 2006-03-09 | Telefonaktiebolaget Lm Ericsson (Publ) | Data unit sender and data unit relay device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102082651A (en) | 2011-06-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101047431B (en) | Method for implementing mixed automatic retransmit in communication system containing repeater station | |
| CN102461004B (en) | Data communication method and device in communication system | |
| KR100889785B1 (en) | Retransmission apparatus and method in wireless relay communication system | |
| CN102237989B (en) | A kind of method and system of transfer of data | |
| EP2057775B1 (en) | Relay-assisted harq transmission system | |
| US7975199B2 (en) | Relay-assisted HARQ transmission system | |
| US8171366B2 (en) | Method of retransmission control in wireless relay system, wireless relay station, and wireless base station | |
| KR20090110791A (en) | Apparatus and method for supporting synchronous hybride automatic repeat request in a boradband wireless communication system | |
| CN101933278B (en) | Method of resource allocation for hybrid-automatic repeat request | |
| US20060251015A1 (en) | System and method for dynamic allocation of ARQ feedback in a multi-carrier wireless network | |
| CN101883325A (en) | Method and apparatus for multicast and broadcast retransmission in wireless communication systems | |
| KR100976384B1 (en) | Apparatus and method for hybrid arq signalling in broadband wireless communication system | |
| CN101568153B (en) | Method and device for transmitting small packet services in real time | |
| CN109152071A (en) | Data transmission instruction and data transmission method, base station, terminal and storage medium | |
| CN109804695A (en) | Downlink data transmission method, method of reseptance, device and storage medium | |
| CN101902777B (en) | Hybrid automatic repeat request (HARQ) method and base station equipment | |
| CN102148673A (en) | Downlink acknowledgement/unacknowledgement information processing method and system | |
| CN102082651B (en) | Method for realizing mixed automatic retransmission in relay station-including communication system | |
| CN102035632B (en) | Data transmission method and system in wireless relay scene | |
| CN110381538A (en) | Broadcasting network and cellular network collaborative transmission method and system | |
| CN102292927B (en) | Method and evolution base station for hybrid automatic repeat request | |
| CN101610138A (en) | The implementation method and the system of the automatic repeat requests of up mixing | |
| CN104427550A (en) | Method and apparatus for transmitting uplink data in a business flow self-adaption system | |
| KR101140091B1 (en) | Method for performing a harq in a radio communication system | |
| CN101790194A (en) | Mixed automatic retransmission request method, device and system for relay uplink |
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 |