CN101083518B - Method for retransmitting downlink and uplink distributed data - Google Patents
Method for retransmitting downlink and uplink distributed data Download PDFInfo
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- CN101083518B CN101083518B CN2006100831068A CN200610083106A CN101083518B CN 101083518 B CN101083518 B CN 101083518B CN 2006100831068 A CN2006100831068 A CN 2006100831068A CN 200610083106 A CN200610083106 A CN 200610083106A CN 101083518 B CN101083518 B CN 101083518B
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Abstract
The invention publishes a method of distributional data re-transmit to solve the question that the border area of wireless communication system has bad communication quality and low data transmission accuracy. The downward is: the base station sent the downward data; the relaying station receives and saves the downward data; the terminal sent the error message of the downward data when the terminal receives error data; the relaying station save this downward data after checking and sent the application information to the base station. The proxy base station resent the downward data to the terminal; the upward is: the terminal sent the upward data; the relaying station receives and saves the upward data; the base station sent the error message of the upward data when the base station receives error data; the relaying station save this upward data after checking and sent the application information to the base station. The proxy terminal resent the downward data to the base station. The method can improve throughput and the service of the border area of wireless communication system.
Description
Technical field
The present invention relates to a kind of data repeating method, be specifically related to the method that down link and uplink distributed data retransmit in the wireless telecommunication system.
Background technology
In wireless telecommunication system, the reliability of communication and the quality of the service that provides directly are provided the quality quality of communication link.High communication quality is mainly one of pursuing one's goal of each wireless telecommunication system design and realization.But reality is the communication hot zones often to be present in the built-up urban district, through reflection and the scattering of shelter to wireless signal, and the penetration loss of building, serious decline can take place in wireless signal, has worsened the communication link between the transceiver.Also reduced simultaneously the coverage of base station.This patent has proposed a kind of Extended Cell and has covered, and improves communication quality, increases the method for message transmission rate.
Generally speaking, be center (not considering the blind spot area of below, base station) with the base station, the communication link quality is by good variation, up to not covering.In order to guarantee normal communication, the encoding rate of use from high to low, order of modulation is also from high to low.The user who is in area, base station range edge like this can not obtain good service quality.
Cover in order to increase the sub-district, currently adopted following technology:
The communications band that chooses.Good communication frequency band has suitable wavelengths, can provide good propagation characteristic in the communication environment of complexity, is implemented in the nlos environment and communicates by letter.But it is very limited that reality is frequency spectrum resource, and national governments have all carried out corresponding planning, and communication apparatus can only be applicable to the frequency range that some is fixing.
Radio frequency zooms out, and is signal of base station is moved at a distance by the wire communication link, to realize the covering to non-neighborhood.Generally speaking, it is to link to each other with the base station by wired mode that radio frequency zooms out end, and this has increased cost, has limited application.And radio frequency zooms out the scope that can only increase covering, and can not increase the capacity of base station.
The radio relay communication technology generally is meant by relay station and realizes backwoodsman covering.The radio relay communication technology just prolongs base station signal by relay station, and the relay communication between base station and the relay station has also taken the bandwidth resources of base station, this technology is the data (comprising the data of transmission for the first time and the data of repeating transmission) that relay stations or relay station receive base station (or terminal) transmission, and be transmitted to terminal (or base station), in a word, this relay station is data of transmitting all receptions; No matter be correct data or wrong data, too much like this waste the resource of system.
The error code retransmission technique can improve the capacity of system, and can increase covering to a certain extent.But when link performance worsens, can cause lot of data to retransmit, retransmission packet too much can excessive occupying system resources, causes the decline of throughput of system on the contrary.Simultaneously, the covering of the increase sub-district that the error code retransmission technique can only be limited.
Above method, though can increase the coverage of sub-district, but still have the problem of the QoS of customer decline at edge, sub-district.
Summary of the invention
In order to overcome above-mentioned defective, the object of the present invention is to provide a kind of coverage that increases the sub-district also can improve edge, sub-district quality of services for users, improve the method that throughput is descending and uplink distributed data retransmits of sub-district.
In order to achieve the above object, the method that a kind of down link distributed data of the present invention retransmits, the base station sends downlink data to relay stations and terminal; Relay stations receive and preserve this downlink data; When terminal received this downlink data mistake, terminal sent the downlink data error message to relay stations and base station; After relay stations receive the downlink data error message of terminal transmission, check the descending reception memorizer of these relay stations,, then send agent request information, act on behalf of the base station and retransmit this downlink data to terminal to the base station if preserved this downlink data in this memory.
Wherein, the method for above-mentioned down link distributed data re-transmission specifically may further comprise the steps:
(11) base station sends downlink data according to time division multiplexing or frequency division multiplexing frame format to relay stations and terminal, and the while is also stored this downlink data;
(12) relay stations receive the downlink data that the base station sends, to this downlink data frame decoding and be saved in the descending reception memorizer of these relay stations;
(13) terminal receives the downlink data that belongs to this terminal, and to relay stations and base station echo reply message;
(14) relay stations are if receive response message that terminal returns when being the correct message of downlink data receiving, and then relay stations abandon that the base station of preserving in its descending reception memorizer sends and by the correct data that receive of terminal; If receive response message that terminal returns when being the downlink data receiving error message, then relay stations check in its descending reception memorizer whether have the data that terminal takes defeat, if having, then send agent request information to the base station, if do not have, then send the agency and abandon message to the base station;
(15) if the base station receives the Agent Solicitation that relay stations send, then the base station sends proxy response message to relay stations and terminal; If the base station receives the agency of relay stations transmission and abandons message, then the base station sends the data that terminal takes defeat to relay stations and terminal again;
(16) relay stations are if receive the proxy response message that the base station sends, then relay stations resend the data that terminal receives mistake to terminal, terminal receives the downlink data that relay stations resend, and relay stations send agency confirmation message to the base station, continuation step (17); Relay stations then send Agent Solicitation to the base station again if do not receive the proxy response message that the base station sends, and forward step (15) to;
(17) then finish if receive the agency confirmation message that relay stations send the base station; The base station then sends proxy response message to relay stations again if do not receive the agency confirmation message that relay stations send, and forwards step (16) to;
Wherein, in the described step (11), this downlink data frame comprises: the data message of pilot frequency information, control information, terminal.
Wherein, described step (13) is specially: terminal receives the downlink data that belongs to this terminal according to the control information in the downlink data frame that receives, and to relay stations and base station echo reply message.
Wherein, in the step (14), described relay stations comprise to the agent request information that the base station sends: the data volume size and the used coding and the modulation system of transmission.
Wherein, in the step (15), the base station is the data allocations bandwidth that resends according to coding and the modulation intelligence that relay stations provide, and distribution locations information and transmission time information composition proxy response message are sent to relay stations and terminal.
Wherein, in the step (16), after relay stations receive the proxy response message that the base station sends, in the bandwidth of the transmitting time of base station assigns and distribution, terminal is received wrong data and resend, and send agency confirmation message to the base station to terminal.
Wherein, described step (14) is: if relay stations do not receive the correct or wrong message of downlink data reception that terminal sends at timer then, then do not send any message, and abandon the downlink data that base station that relay stations preserve sends to terminal to the base station.
Wherein, described step (15) is: if message is abandoned timer does not receive the relay stations transmission then Agent Solicitation or agency in the base station, then send downlink data or abandon transmission to relay stations and terminal again according to common automatic retransmission mechanism.
Wherein, in the described step (16), described relay stations after the number of times of base station transmission Agent Solicitation reaches predetermined times, are not still received the response message of base station again, and the base station that then abandons storage sends to the downlink data of terminal.
Wherein, in the described step (17), the base station sends proxy response message to relay stations again, if the number of times of retransmitting surpasses after the number of times of timer regulation, still do not receive the agency confirmation message that relay stations send, then resend downlink data or abandon transmission according to common automatic repeat requests mechanism.
Wherein, in the described step (16): if terminal does not receive the data of repeating transmission in the timer official hour, then terminal resends the downlink data error message, if terminal receives the downlink data that has correctly received, then abandons the downlink data of this repeating transmission.
For achieving the above object, the method that a kind of uplink distributed data of the present invention retransmits, terminal sends upstream data to relay stations and base station; Relay stations receive and preserve this upstream data; When the base station received the upstream data mistake, the base station sent the upstream data error message to relay stations and terminal; Relay stations receive after this message, check the up reception memorizer of these relay stations, if preserved this upstream data in this memory, then send agent request information to the base station, and proxy terminal is retransmitted this upstream data and given the base station.
Wherein, specifically may further comprise the steps:
(21) terminal sends upstream data to relay stations and base station according to time division multiplexing or frequency division multiplexing frame format according to the bandwidth of base station assigns;
(22) upstream data that sends of relay stations receiving terminal, and to this upstream data decoding and be stored in the up reception memorizer of relay stations;
(23) base station then receives correct message to terminal and relay stations transmission upstream data if correctly receive the upstream data of terminal transmission, if the up data that wrong receiving terminal sends then send upstream data reception error message to terminal and relay stations;
(24) relay stations receive correct message if receive the upstream data that the base station sends, and then abandon that the terminal of preserving in its up reception memorizer sends and by the correct data that receive in base station; If receive the upstream data reception error message that the base station sends, then check and whether have the data that the base station takes defeat in its up reception memorizer: if having, then send Agent Solicitation to the base station, continue step (25), if do not have, then abandon message to base station and terminal transmission agency respectively, forward step (27) to;
(25) proxy response message is then returned to relay stations if receive the Agent Solicitation that relay stations send in the base station;
(26) relay stations are if receive the proxy response message that the base station sends, then send the base station and receive wrong data to the base station, the base station receives the upstream data that relay stations resend, and relay stations send agency confirmation message to terminal, if terminal receives the agency confirmation message that relay stations send, then finish; If relay stations do not receive proxy response message, then resend Agent Solicitation and give the base station, forward step (25) to;
(27) base station receives the agency that relay stations send and abandons message, waits for that terminal resends upstream data; Terminal receives relay stations transmission agency and abandons message, then sends the data that the base station receives mistake to base station and relay stations again.
Wherein, described step (24) is: if relay stations do not receive the correct or wrong message of upstream data reception that the base station sends in the timer official hour, then do not send any message, and abandon the data of the terminal transmission of preserving in the up reception memorizer to base station and terminal.
Wherein, described step (24) is: if the base station does not receive Agent Solicitation in the timer official hour, then resend the message of Data Receiving mistake.
Wherein, described step (26) is: if relay stations are after resending Agent Solicitation and giving the number of times that the repeating transmission number of times of base station exceeded the timer regulation, still do not receive the proxy response message of base station, then abandon the upstream data of the terminal transmission that is stored in up reception memorizer.
Wherein, in the described step (24), described relay stations send Agent Solicitation to the base station and comprise: the size information and the modulation coding mode that send data.
Wherein, in the described step (25), the base station is returned proxy response message to relay stations and is comprised that the base station is the bandwidth information that the relay stations corresponding with it distribute.
Wherein, in the described step (26), relay stations then send the base station according to bandwidth allocation information to the base station and receive wrong data, and send agency confirmation message to terminal if receive the proxy response message that the base station sends.
Method of the present invention, relay stations are only when terminal (or base station) receives error in data, the data that just replace base station (or terminal) will need to retransmit send to terminal (or base station), at this moment, base station (or terminal) does not need to resend the data that receive mistake, compare with general radio relay communication technology, distributed data retransmission technique of the present invention is easy to simply realize that Extended Cell covers, improves service quality, the raising cell throughout of terminal communication quality, balance cell terminal effectively.
Description of drawings
Fig. 1 is a cell channel mass distribution schematic diagram.
Fig. 2 is that distributed data retransmits schematic diagram.
Fig. 3 is the downlink transmission flow chart that distributed data retransmits.
Fig. 4 is the uplink data transmission flow chart that distributed data retransmits.
Embodiment
Do further detailed explanation below in conjunction with the method that accompanying drawing retransmits distributed data of the present invention.
The distributed data repeating method of down link of the present invention:
If at least one terminal has inserted in the base station of this sub-district, terminal is positioned at the relatively poor area of sub-district covering performance, and communicates with the base station; Relay stations and base station keep synchronously, and relay stations of the present invention include data storage (being descending reception memorizer during down link, is the up link reception memorizer when up) at least, transmit and receive device, modulation and demodulation device.
(1) base station sends data according to certain frame format, and stores the data that send to terminal, can comprise pilot frequency information, control information, terminal data in this frame.
(2) relay stations receive the data that the base station sends, and decode and are stored in the descending reception memorizer of relay stations.
(3) terminal receives the downlink data that belongs to terminal according to the control information that the base station sends.
A: correct if terminal receives data, then send downlink data and receive correct message.
B:, then send downlink data and receive error message, with informing base station and relay stations Data Receiving mistake if terminal receives error in data.
(4) uplink data of relay stations receiving terminal.
A: receive correct message if relay stations successfully receive the downlink data that terminal sends in the step (3), then relay stations abandon that the base station of preserving in its descending reception memorizer sends and by the correct data that receive of terminal.
B: receive error message if relay stations successfully receive the downlink data that terminal sends in the step (3), relay stations are resolved message, obtain the information that terminal receives error data packets.Relay stations searching downlink reception memorizer, check whether relay stations successfully receive the packet that terminal takes defeat, if the match is successful in search, then relay stations send Agent Solicitation to the base station, this message can comprise the data volume size of transmission, and coding and the modulation system used.If the search coupling is unsuccessful, then relay stations send the agency to the base station and abandon message, and informing base station resends this data.
C: do not receive correct/error message if relay stations successfully receive the downlink data that terminal sends in (promptly relevant timer then after) time of regulation, then do not send any message, and abandon the data that base station that relay stations preserve sends to terminal to the base station.
(5) base station receives upstream data.
A: if the base station successfully receives the Agent Solicitation that relay stations send in the step (4), then coming according to information such as coding that relay stations provided and modulation is that relay stations distribute the required bandwidth of retransmission data, and distribution locations information and transmission time information are sent to relay stations and terminal by proxy response message.
B: abandon message if the base station successfully receives the agency that relay stations send in the step (4), then resend terminal and receive wrong data.
C: do not abandon message if the base station successfully receives the Agent Solicitation or the agency of relay stations transmission at the appointed time, then resend data, perhaps abandon sending according to common automatic repeat requests mechanism.
(6) if relay stations successfully receive the proxy response message that the base station sends, resolve this message, and on time of appointment and the position distributed, terminal is received wrong data and resend, and send agency confirmation message to the base station to terminal.If relay stations do not receive the proxy response message that the base station sends at the appointed time, then resend Agent Solicitation, and wait for the response of base station.(predetermined times that allows here to resend Agent Solicitation is decided by manufacturer certain number of times.) retry after, still do not receive the response message of base station, the base station that then abandons storage sends to the data of terminal.
(7) if the base station is not received the agency confirmation message that sends in (6) at the appointed time, then the base station can be dispatched the data of needs re-transmission again, and sends proxy response message to relay stations and terminal again.After the retry of certain number of times, if still do not receive the agency confirmation message that relay stations send, then the base station resends data according to common automatic repeat requests mechanism, perhaps abandons sending.
(8) control information that sends according to the base station of terminal receives the downlink data that base station or relay stations resend.If terminal does not successfully receive the data of repeating transmission in official hour, then terminal resends downlink data and receives error message, returns step (4).If terminal receives the data that correctly received, then abandon these data.
The distributed data repeating method of up link of the present invention:
If at least one terminal has inserted in the base station of this sub-district, keep synchronously with the base station, terminal is positioned at the relatively poor area of sub-district covering performance, and communicates with the base station; Relay stations and base station keep synchronously.
(1) according to the bandwidth of base station assigns, terminal sends data according to certain frame format.
(2) data that send of relay stations receiving terminal are decoded and are stored in the up reception memorizer of relay stations.
(3) data of base station receiving terminal, the upstream data that decoding terminal sends.
A: if the data of the correct receiving terminal in base station then send upstream data and receive correct message.
B:, receive mistake with notice relay stations and terminal data if the error in data of base station receiving terminal then sends upstream data and receives error message.
(4) relay stations receive the down link data of base station.
A: receive correct message if relay stations successfully receive the upstream data that the base station sends in the step (3), then relay stations abandon that the terminal of preserving in its up reception memorizer sends and by the correct data that receive in base station.
B: receive error message if relay stations receive the upstream data that the base station sends in the step (3), relay stations are resolved message, and obtain the information that the base station receives error data packets.Relay stations are searched for up reception memorizer, check whether relay stations successfully receive the packet that the base station takes defeat in the step (3).If the match is successful in search, relay stations send Agent Solicitation to the base station, and this message can comprise size information and the employed modulation coding mode that receives data.If the search coupling is unsuccessful, relay stations are abandoned message to base station and terminal transmission agency respectively.
C: if relay stations successfully do not receive the upstream data reception correct/error message that the base station sends at the appointed time, then do not send any message, and abandon the data of the terminal transmission of preserving in the up reception memorizer to base station and terminal.
(5) base station receives the message that relay stations send.
A: if the base station successfully receives the Agent Solicitation that relay stations send, the information distribution corresponding bandwidth of the transmission data that provide according to relay stations, and send and comprise the proxy response message of assignment information to relay stations.
B: abandon message if the base station successfully receives the agency of relay stations transmission, wait for that then terminal resends data.
C: if the base station does not receive Agent Solicitation at the appointed time or the agency abandons message, then in the descending Data Receiving error notification message that resends.
(6) relay stations receive the proxy response message that the base station sends.
A: if relay stations successfully receive proxy response message, then according to bandwidth allocation information, relay stations send to receive wrong data to the base station, and in descending transmission agency confirmation message to terminal.
B: if relay stations do not receive proxy response message, then resend Agent Solicitation and give the base station, and wait for the response of base station.After the retry of certain number of times,, then abandon the data of the terminal of storage if still do not receive the response of base station.
(7) terminal downlink data receiving.If terminal receives the agency of relay stations transmission and abandons message, then receive wrong data in the up base station that resends.If terminal does not receive the agency confirmation message that relay stations send in official hour, then in up send opportunity, resend the base station and receive wrong data.
(8) base station reception relay stations or terminal are in the data of up repeating transmission.
Below in conjunction with accompanying drawing the method for this invention is done and to be elaborated:
Shown in Figure 1 is cell channel mass distribution schematic diagram.In closer place, distance base station, channel quality is better, can use the modulation system of high-order and the coded system of two-forty, as adopting 64QAM and 16QAM modulation system; In the border district of sub-district, channel quality is relatively poor, can only use the code modulation mode of low order, as adopting QPSK (quarternary phase-shift keying (QPSK) signal) modulation demodulation system.
Shown in Figure 2 is that distributed data retransmits schematic diagram.Terminal has inserted in the base station of this sub-district, and communicates with the base station.But because terminal is positioned at the edge of sub-district, the poor quality of the communication link between terminal and the base station.Relay stations keep synchronous in time with corresponding base station of communicating by letter.
Shown in Figure 3 is that distributed data retransmits the downlink transmission schematic diagram.The base station sends data, and these data are to send with certain frame format, can be TDD (time division multiplexing) pattern or FDD (frequency division multiplexing) pattern.This frame format comprises pilot frequency information, control information and user's data information.Relay stations receive all user's data that the base station sends, and are stored in the descending reception memorizer of relay stations.Terminal receives one's own downlink data.Because terminal is in cell edge region, communication signal is relatively poor, and the data that terminal receives make a mistake.After terminal is found error in data, then send downlink data and receive error message,, require to retransmit with informing base station and relay stations Data Receiving mistake.
After relay stations receive the message of the request repeat data that terminal sends, relay stations searching downlink reception memorizer, check whether relay stations successfully receive the data that terminal takes defeat, if in the descending reception memorizer of relay stations this data are arranged, then send Agent Solicitation to the base station, this message can comprise the data volume size of transmission, and used coding and modulation system.If these data not in the descending reception memorizer of relay stations then send the agency to the base station and abandon message.If relay stations successfully do not receive the message of the request repeat data of this terminal transmission, then do not send any message, and abandon the data that the base station of being preserved sends to terminal to the base station.
The base station receives upstream data, if receive the Agent Solicitation that relay stations send at the appointed time.Then coming according to information such as coding that relay stations provided and modulation is to retransmit the data allocations bandwidth, and distribution locations information and transmission time information are sent to relay stations and terminal by proxy response message.If the base station receives the agency of relay stations transmission and abandons message, then the base station resends the data of this terminal in down link.
Relay stations receive the proxy response message that the base station sends.And in the bandwidth of time of appointment and distribution, data are resend to terminal, and send agency confirmation message to the base station.
Fig. 4 is the uplink data transmission schematic flow sheet that distributed data retransmits:
According to the bandwidth of base station assigns, terminal sends data according to certain frame format.The data that the relay stations receiving terminal sends, and be stored in the up reception memorizer of relay stations.The base station receives data, and the upstream data of analysing terminal transmission.If the error in data of base station receiving terminal then can send upstream data reception error notification message to relay stations and terminal, request resends data.
The relay stations receiving downlink data.If relay stations receive the upstream data reception error message that the base station sends, relay stations are resolved this message, and definite base station receives error data packets.The up reception memorizer of search relay stations, check whether relay stations successfully receive the packet that the base station takes defeat, if search for successfully, relay stations send Agent Solicitation to the base station, and this message can comprise size information and the modulation coding mode that sends data.Do not receive error data packets if preserve the base station on the relay stations in the line storage, then relay stations send the agency and abandon message to base station and terminal.
After the base station receives the Agent Solicitation of relay stations transmission, then can distribute bandwidth for the relay stations of correspondence, and bandwidth allocation information sent to relay stations by proxy response message, relay stations receive the bandwidth allocation information that the base station sends, according to bandwidth allocation information, relay stations send the data that the base station takes defeat to the base station, and send agency confirmation message to terminal.
Method of the present invention also can be applicable to have a plurality of terminals to insert same sub-district simultaneously in the actual cellular system, and in the same moment, may have more than one terminal and carry out the distributed data re-transmission; In the method for the present invention, relay stations are only when terminal (or base station) receives error in data, the data that just replace base station (or terminal) will need to retransmit send to terminal (or base station), at this moment, base station (or terminal) does not need to resend the data that receive mistake, compare with general radio relay communication technology, distributed data retransmission technique of the present invention is easy to simply realize that Extended Cell covers, improves service quality, the raising cell throughout of terminal communication quality, balance cell terminal effectively.
Claims (18)
1. the method that the down link distributed data retransmits is characterized in that, the base station sends downlink data to relay stations and terminal; Relay stations receive and preserve this downlink data; When terminal received this downlink data mistake, terminal sent the downlink data error message to relay stations and base station; After relay stations receive the downlink data error message of terminal transmission, check the descending reception memorizer of these relay stations,, then send agent request information, act on behalf of the base station and retransmit this downlink data to terminal to the base station if preserved this downlink data in this memory;
This method specifically may further comprise the steps:
(11) base station sends downlink data according to time division multiplexing or frequency division multiplexing frame format to relay stations and terminal, and the while is also stored this downlink data;
(12) relay stations receive the downlink data that the base station sends, to this downlink data frame decoding and be saved in the descending reception memorizer of these relay stations;
(13) terminal receives the downlink data that belongs to this terminal, and to relay stations and base station echo reply message;
(14) relay stations are if receive response message that terminal returns when being the correct message of downlink data receiving, and then relay stations abandon that the base station of preserving in its descending reception memorizer sends and by the correct data that receive of terminal; If receive response message that terminal returns when being the downlink data receiving error message, then relay stations check in its descending reception memorizer whether have the data that terminal takes defeat, if having, then send agent request information to the base station, if do not have, then send the agency and abandon message to the base station;
(15) if the base station receives the Agent Solicitation that relay stations send, then the base station sends proxy response message to relay stations and terminal; If the base station receives the agency of relay stations transmission and abandons message, then the base station sends the data that terminal takes defeat to relay stations and terminal again;
(16) relay stations are if receive the proxy response message that the base station sends, then relay stations resend the data that terminal receives mistake to terminal, terminal receives the downlink data that relay stations resend, and relay stations send agency confirmation message to the base station, continuation step (17); Relay stations then send Agent Solicitation to the base station again if do not receive the proxy response message that the base station sends, and forward step (15) to;
(17) then finish if receive the agency confirmation message that relay stations send the base station; The base station then sends proxy response message to relay stations again if do not receive the agency confirmation message that relay stations send, and forwards step (16) to.
2. the method that retransmits according to the described down link distributed data of claim 1 is characterized in that in the described step (11), this downlink data frame comprises: the data message of pilot frequency information, control information, terminal.
3. the method that retransmits according to the described down link distributed data of claim 2, it is characterized in that, described step (13) is specially: terminal receives the downlink data that belongs to this terminal according to the control information in the downlink data frame that receives, and to relay stations and base station echo reply message.
4. the method that retransmits according to the described down link distributed data of claim 3 is characterized in that, in the step (14), described relay stations comprise to the agent request information that the base station sends: the data volume size and the used coding and the modulation system of transmission.
5. the method that retransmits according to the described down link distributed data of claim 4, it is characterized in that, in the step (15), the base station is the data allocations bandwidth that resends according to coding and the modulation intelligence that relay stations provide, and distribution locations information and transmission time information composition proxy response message are sent to relay stations and terminal.
6. the method that retransmits according to the described down link distributed data of claim 5, it is characterized in that, in the step (16), after relay stations receive the proxy response message of base station transmission, in the bandwidth of the transmitting time of base station assigns and distribution, terminal is received wrong data and resend, and send agency confirmation message to the base station to terminal.
7. the method that retransmits according to the described down link distributed data of claim 1, it is characterized in that, described step (14) is: if relay stations do not receive the correct or wrong message of downlink data reception that terminal sends at timer then, then do not send any message, and abandon the downlink data that base station that relay stations preserve sends to terminal to the base station.
8. the method that retransmits according to the described down link distributed data of claim 1, it is characterized in that, described step (15) is: if message is abandoned timer does not receive the relay stations transmission then Agent Solicitation or agency in the base station, then send downlink data or abandon transmission to relay stations and terminal again according to common automatic retransmission mechanism.
9. the method that retransmits according to the described down link distributed data of claim 1, it is characterized in that, in the described step (16), described relay stations are again after the number of times of base station transmission Agent Solicitation reaches predetermined times, still do not receive the response message of base station, the base station that then abandons storage sends to the downlink data of terminal.
10. the method that retransmits according to the described down link distributed data of claim 1, it is characterized in that, in the described step (17), the base station sends proxy response message to relay stations again, if the number of times of retransmitting surpasses after the number of times of timer regulation, still do not receive the agency confirmation message that relay stations send, then resend downlink data or abandon transmission according to common automatic repeat requests mechanism.
11. method according to the described down link distributed data re-transmission of claim 1, it is characterized in that, in the described step (16): if terminal does not receive the data of repeating transmission in the timer official hour, then terminal resends the downlink data error message, if terminal receives the downlink data that has correctly received, then abandon the downlink data of this repeating transmission.
12. the method that uplink distributed data retransmits is characterized in that, terminal sends upstream data to relay stations and base station; Relay stations receive and preserve this upstream data; When the base station received the upstream data mistake, the base station sent the upstream data error message to relay stations and terminal; Relay stations receive after this message, check the up reception memorizer of these relay stations, if preserved this upstream data in this memory, then send agent request information to the base station, and proxy terminal is retransmitted this upstream data and given the base station;
This method specifically may further comprise the steps:
(21) terminal sends upstream data to relay stations and base station according to time division multiplexing or frequency division multiplexing frame format according to the bandwidth of base station assigns;
(22) upstream data that sends of relay stations receiving terminal, and to this upstream data decoding and be stored in the up reception memorizer of relay stations;
(23) base station then receives correct message to terminal and relay stations transmission upstream data if correctly receive the upstream data of terminal transmission, if the up data that wrong receiving terminal sends then send upstream data reception error message to terminal and relay stations;
(24) relay stations receive correct message if receive the upstream data that the base station sends, and then abandon that the terminal of preserving in its up reception memorizer sends and by the correct data that receive in base station; If receive the upstream data reception error message that the base station sends, then check and whether have the data that the base station takes defeat in its up reception memorizer: if having, then send Agent Solicitation to the base station, continue step (25), if do not have, then abandon message to base station and terminal transmission agency respectively, forward step (27) to;
(25) proxy response message is then returned to relay stations if receive the Agent Solicitation that relay stations send in the base station;
(26) relay stations are if receive the proxy response message that the base station sends, then send the base station and receive wrong data to the base station, the base station receives the upstream data that relay stations resend, and relay stations send agency confirmation message to terminal, if terminal receives the agency confirmation message that relay stations send, then finish; If relay stations do not receive proxy response message, then resend Agent Solicitation and give the base station, forward step (25) to;
(27) base station receives the agency that relay stations send and abandons message, waits for that terminal resends upstream data; Terminal receives relay stations transmission agency and abandons message, then sends the data that the base station receives mistake to base station and relay stations again.
13. method according to the described uplink distributed data re-transmission of claim 12, it is characterized in that, described step (24) is: if relay stations do not receive the correct or wrong message of upstream data reception that the base station sends in the timer official hour, then do not send any message, and abandon the data of the terminal transmission of preserving in the up reception memorizer to base station and terminal.
14. method according to the described uplink distributed data re-transmission of claim 12, it is characterized in that, described step (24) is: if the base station does not receive Agent Solicitation in the timer official hour, then resend the message of Data Receiving mistake.
15. method according to the described uplink distributed data re-transmission of claim 12, it is characterized in that, described step (26) is: if relay stations are after resending Agent Solicitation and giving the number of times that the repeating transmission number of times of base station exceeded the timer regulation, still do not receive the proxy response message of base station, then abandon the upstream data of the terminal transmission that is stored in up reception memorizer.
16. the method according to the described uplink distributed data of claim 12 retransmits is characterized in that, in the described step (24), described relay stations send Agent Solicitation to the base station and comprise: the size information and the modulation coding mode that send data.
17. the method according to the described uplink distributed data of claim 12 retransmits is characterized in that, in the described step (25), the base station is returned proxy response message to relay stations and is comprised that the base station is the bandwidth information that the relay stations corresponding with it distribute.
18. method according to the described uplink distributed data re-transmission of claim 17, it is characterized in that, in the described step (26), relay stations are if receive the proxy response message that the base station sends, then send the base station to the base station and receive wrong data, and send agency confirmation message to terminal according to bandwidth allocation information.
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| KR101264538B1 (en) | 2009-01-06 | 2013-05-14 | 후지쯔 가부시끼가이샤 | Radio communication system, base station, mobile station, radio communication method |
| CN101860797B (en) * | 2010-05-21 | 2014-08-13 | 中兴通讯股份有限公司 | Transmission method of data information, device thereof and mobile multimedia broadcasting service system |
| CN103188060A (en) * | 2011-12-30 | 2013-07-03 | 华为技术有限公司 | Retransmission method and retransmission device |
| CN104655297A (en) * | 2013-11-18 | 2015-05-27 | 武汉华和机电技术有限公司 | Device and method for large-scale bus slot temperature monitoring |
| JP6697090B2 (en) * | 2016-04-25 | 2020-05-20 | オッポ広東移動通信有限公司Ｇｕａｎｇｄｏｎｇ Ｏｐｐｏ Ｍｏｂｉｌｅ Ｔｅｌｅｃｏｍｍｕｎｉｃａｔｉｏｎｓ Ｃｏｒｐ．， Ｌｔｄ． | Data transmission method and device |
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