CN101855857B - For carrying out the method and apparatus of autonomous retransmission in cordless communication network - Google Patents
For carrying out the method and apparatus of autonomous retransmission in cordless communication network Download PDFInfo
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- CN101855857B CN101855857B CN200780100784.3A CN200780100784A CN101855857B CN 101855857 B CN101855857 B CN 101855857B CN 200780100784 A CN200780100784 A CN 200780100784A CN 101855857 B CN101855857 B CN 101855857B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
Abstract
The invention provides a kind of in the source device of cordless communication network for carrying out method and the device of autonomous retransmission, first source device receives the HARQ message from the next stage network equipment; Secondly according to described HARQ message, the signal previously sent is re-started transmission with the power output increased.In retransmission processes, source device often receives a HARQ message, with regard to adjusting its power output (increasing its power output), the signal previously sent is retransmitted, because source device is that the power output increased resends the signal previously sent, therefore, the reliability that signal retransmits increases greatly, thus decreases the average delay time of network.
Description
Technical field
The present invention relates to cordless communication network, particularly relate in cordless communication network based on the apparatus and method that HARQ retransmits signal.
Background technology
At present, cordless communication network adopts automatic retransmission mechanism (ARQ) to solve the problem of data transmission fails usually.Particularly, after primary network station equipment receives the signal from the upper level network equipment instantly, can verify this signal.When check results is correct, this signal is forwarded to the next stage network equipment again by the next stage network equipment; When check results is mistake, the next stage network equipment sends the supreme primary network station equipment of HARQ (ARQ) message, after the upper level network equipment receives this HARQ (ARQ) message, the signal previously sent is retransmitted, until the next stage network equipment receives the maximum number of retransmissions that correct signal transmission or arrival preset, the signal from the upper level network equipment received just is forwarded to the next stage network equipment again by the next stage network equipment.
Particularly, Fig. 1 shows the schematic network structure of the wireless relay network according to prior art, there is shown subscriber equipment 1, relay station 2 and base station 3.Although it will be understood by those skilled in the art that in figure and merely illustrate a relay station, multiple relay station can be comprised in a particular application.More specifically, under the relay station 2 shown in Fig. 1 is operated in decoding forward direction repeater mode, after relay station receives the signal from subscriber equipment 1, verify this signal, when check results is correct, this signal is forwarded to base station 3 by relay station 2; When check results is mistake, relay station 2 sends HARQ (ARQ) message to subscriber equipment 1, after subscriber equipment 1 receives this HARQ (ARQ) message, the signal previously sent is retransmitted, until relay station 2 receives the maximum number of retransmissions that correct signal transmission or arrival preset, the signal from subscriber equipment 1 received just is forwarded to base station 3 by relay station 2.It will be understood by those skilled in the art that described verification can comprise cyclic redundancy (CRC) verification or parity check, also can comprise the code check mode of other types.
Under the relay station 2 shown in Fig. 1 is operated in amplification forward direction repeater mode, after relay station connects 2 signals received from subscriber equipment 1, this signal is not decoded, and after only this signal being amplified, be forwarded to base station 3, namely relay station 2 does not verify the signal from subscriber equipment 1.After base station 3 receives the signal forwarded from relay station 2, it is verified, when check results is mistake, base station 3 sends HARQ (ARQ) message to relay station 2, then, relay station 2 is forwarded to subscriber equipment 1 again, after subscriber equipment 1 receives this HARQ (ARQ) message, the signal previously sent being retransmitted, just stopping the signal to previously sending to retransmit until base station 3 receives the maximum number of retransmissions that correct signal transmission or arrival presets.
In the signal retransmission processes of the cordless communication network based on HARQ according to prior art, the upper level network equipment periodically increases its power output and retransmits the signal previously sent, and within cycle regular time, the upper level network equipment is all retransmit the signal previously sent with identical power output.Therefore, when signal to noise ratio is lower, within cycle regular time, the possibility that retransmission error occurs when retransmitting the signal previously sent with identical power output the upper level network equipment is again very high, thus cause the increase of number of retransmissions, cause the increase of the average delay time of whole network further.
Summary of the invention
For solving above-mentioned shortcoming of the prior art, the present invention proposes a kind of in the source device of cordless communication network for carrying out the method and apparatus of autonomous retransmission to signal based on HARQ, the signal previously sent is resend with the power output increased after receiving HARQ message by source device, to improve the reliability that signal retransmits, thus reduce the average delay time of whole network.
According to an aspect of the present invention, provide a kind of in the source device of cordless communication network for carrying out the method for autonomous retransmission to signal based on HARQ, it is characterized in that, comprise the following steps: receive the HARQ message from the next stage network equipment; According to described HARQ message, the signal previously sent is retransmitted with the power output increased.
According to another aspect of the present invention, provide a kind of in the source device of wireless network for carrying out the automatic retransmission device of autonomous retransmission to signal based on HARQ, it is characterized in that, comprising: receiving system, for receiving the HARQ message from the next stage network equipment; Signal retransmission arrangement, for according to described HARQ message, retransmits the signal previously sent with the power output increased.
In the present invention, instantly when the signal from source device that primary network station equipment interconnection receives carries out verifying obtained result for mistake, the next stage network equipment sends HARQ to source device, source device, according to described HARQ, re-starts transmission to the signal previously sent with the power output increased.In signal retransmission processes, source device often receives a HARQ message, with regard to adjusting its power output (increasing its power output), the signal previously sent is retransmitted, because source device is that the power output increased resends the signal previously sent, therefore, the reliability that signal retransmits increases greatly, thus decreases the average delay time of network.
Accompanying drawing explanation
By reading the detailed description done non-limiting example done with reference to the following drawings, other features, objects and advantages of the present invention will become more apparent:
Fig. 1 shows the schematic network structure of the wireless relay network according to prior art;
Fig. 2 a shows the schematic network structure according to wireless relay network of the present invention, wherein, under relay station works in decoding forward direction relaying mode of operation;
Fig. 2 b shows the schematic network structure according to wireless relay network of the present invention, wherein, under relay station works in and amplifies forward direction relaying mode of operation;
Fig. 3 shows according to a specific embodiment of the present invention, for carrying out the flow chart of the method for autonomous retransmission to signal based on HARQ in the source device of cordless communication network;
Fig. 4 shows according to a preferred embodiment of the present invention, for carrying out the flow chart of the method for autonomous retransmission to signal based on HARQ in the source device of cordless communication network;
Fig. 5 shows according to another preferred embodiment of the invention, for carrying out the flow chart of the method for autonomous retransmission to signal based on HARQ in the source device of cordless communication network;
Fig. 6 shows according to a specific embodiment of the present invention, for carrying out the structural representation of the automatic retransmission device of autonomous retransmission to signal based on HARQ in the source device of wireless network;
Fig. 7 shows according to a preferred embodiment of the present invention, for carrying out the structural representation of the automatic retransmission device of autonomous retransmission to signal based on HARQ in the source device of wireless network; And
Fig. 8 shows according to a further advantageous embodiment of the invention, for carrying out the structural representation of the automatic retransmission device of autonomous retransmission to signal based on HARQ in the source device of wireless network.
In accompanying drawing, same or analogous Reference numeral represents same or analogous parts.
Embodiment
Describe the present invention hereinafter with reference to accompanying drawing.
Fig. 2 a shows the schematic network structure according to wireless relay network of the present invention, wherein, under relay station works in decoding forward direction relaying mode of operation.
Schematic network structure shown in Fig. 2 a comprises subscriber equipment 1, relay station 2 and base station 3.Although it will be understood by those skilled in the art that in figure and merely illustrate a relay station, in a particular application, multiple relay station can be comprised, i.e. the situation of hop relay network.Under relay station 2 described in figure works in decoding forward direction relaying mode of operation.
Particularly, under relay station 2 is operated in decoding forward direction relaying mode of operation, when after the signal that relay station 2 receives from subscriber equipment 1, this relay station 2 does not directly forward this signal to base station 3, but verifies this signal.When check results is correct, this signal is forwarded to base station 3 by relay station 2; When check results is mistake, relay station 2 sends HARQ (ARQ) message to subscriber equipment 1.When after HARQ (ARQ) message that subscriber equipment 1 receives from relay station 2, its power output (increase power output) is adjusted according to this HARQ, then, the signal previously sent is retransmitted with the power output increased.If after relay station 2 receives the signal through retransmitting, the result verified this re-transmitted signal is still mistake, then repeat above-mentioned step, until relay station 2 receives the maximum number of retransmissions that correct re-transmitted signal or arrival preset, just the signal from subscriber equipment 1 received is forwarded to base station 3.
Similarly, when after the signal that base station 3 receives from relay station 2, this signal is verified.When check results is mistake, base station 3 sends HARQ (ARQ) message to relay station 2.When after HARQ (ARQ) message that relay station 2 receives from base station 3, its power output (increase power output) is adjusted according to this HARQ, then, the signal previously sent is retransmitted with the power output increased.If after base station 3 receives the signal through retransmitting, the result verified this re-transmitted signal is still mistake, then repeating above-mentioned step, until base station 3 receives the maximum number of retransmissions that correct re-transmitted signal or arrival preset, just stopping the signal to previously sending to retransmit.
In the wireless relay network shown in Fig. 2 a, subscriber equipment and relay station are after receiving the HARQ message from the next stage network equipment, all can adjust its power output (increasing its power output), and the signal previously sent is retransmitted with the power output increased.
Fig. 2 b shows the schematic network structure according to wireless relay network of the present invention, wherein, under relay station works in and amplifies forward direction relaying mode of operation.
Schematic network structure shown in Fig. 2 b comprises subscriber equipment 1 ', relay station 2 ' and base station 3 '.Although it will be understood by those skilled in the art that in figure and merely illustrate a relay station, in a particular application, multiple relay station can be comprised.Under relay station 2 ' described in figure works in and amplifies forward direction relaying mode of operation.
Particularly, under relay station 2 ' is operated in and amplifies forward direction relaying mode of operation, when after the signal that relay station 2 ' receives from subscriber equipment 1 ', this signal is not verified, but be directly forwarded to base station 3 ' after this signal is amplified, after base station 3 ' receives the signal forwarded from relay station 2 ', this signal is verified.When check results is mistake, base station 3 ' sends HARQ (ARQ) message to relay station 2 ', and relay station 2 ' forwards it to subscriber equipment 1 ' after receiving this HARQ message again.After subscriber equipment 1 ' receives HARQ (ARQ) message forwarded from relay station 2 ', its power output (increase power output) is adjusted according to this HARQ, then, the signal previously sent is retransmitted with the power output increased.If after base station 3 ' receives the signal through retransmitting, the result verified this re-transmitted signal is still mistake, then repeat above-mentioned step, until base station 3 ' receives the maximum number of retransmissions that correct re-transmitted signal or arrival preset, the signal to previously sending just is stopped to retransmit.
In the wireless relay network shown in Fig. 2 b, subscriber equipment 1 ' is only had just to adjust its power output (increasing its power output) according to the HARQ message received from base station, and the signal previously sent is retransmitted with the power output increased, and relay station 2 ' not power adjustment.
In above-mentioned Fig. 2 a and Fig. 2 b, for having done concise and to the point description according to the schematic network structure of wireless relay network of the present invention under two kinds of relaying mode of operations, hereinafter with reference to accompanying drawing 3-8, the present invention is described in detail further:
Fig. 3 shows according to a specific embodiment of the present invention, for carrying out the flow chart of the method for autonomous retransmission to signal based on HARQ in the source device of cordless communication network.
In this embodiment, first perform step S11, receive the HARQ message from the next stage network equipment;
Secondly perform step S12, determine new power output according to this HARQ message, this new power output more former power output should have certain increment, thus can improve the reliability of re-transmitted signal;
Finally perform step S13, the signal of described previous transmission is retransmitted with described new power output.
In this embodiment, after the next stage network equipment receives the signal from source device, code check is carried out to this signal.Described code check can comprise cyclic redundancy code (CRC) verification or parity check, also the code check mode of other types can be comprised, as long as can judge the correctness of the signal from source device in transmitting procedure, this is that those skilled in the art will be understood that, therefore not to repeat here.
If check results is correct, the next stage network equipment sends ack signal (ACK) to source device, and the signal from source device received is forwarded to the next stage network equipment again; If check results is mistake, the next stage network equipment sends HARQ message (ARQ, or NAK) to source device.Described source device can comprise subscriber equipment, also can comprise mobile-relay station, as long as source device can adjust its power output according to the HARQ received, this is that those skilled in the art will be understood that, therefore not to repeat here.
For step S12, in a preferred embodiment, under one or many retransmits failure scenario, source device may receive the repeatedly HARQ (in pre-determined number) for same signal, for before making each reliability retransmitted all comparatively once transmission increase, source device needs all to do certain adjustment to each power output retransmitted.Preferably, source device can preserve each power output retransmitted, and when receiving another repeat requests, being added by source output power value simply can determining new output power value with this power increment value.More preferably, when source device also can count the HARQ for same signal (ARQ) message from the next stage network equipment, subsequently, source device determines according to the increment of the number of times of described HARQ message and the adjustment of each power the new power output that this repeat requests is corresponding.
For step S12, in a further advantageous embodiment, when after HARQ (ARQ) message that source device receives from the next stage network equipment, power adjustment indication information is obtained from this HARQ message, then, new power output is determined according to changing power adjustment indication information.Particularly, described power adjustment indication information directly can comprise source device and retransmit the power output size that the signal that previously sends should adopt, or comprises the difference of power output of power output that signal that source device retransmits previously transmission should adopt and current source device.Further, the concrete state of channel that described power adjustment indication information also can transmit according to current demand signal is determined adaptively.
After source device determines new power output according to HARQ message, the signal of described previous transmission is retransmitted with described new power output.
Below with reference to Figure 4 and 5, above-mentioned two preferred embodiments are described in detail.
Fig. 4 shows according to a preferred embodiment of the present invention, for carrying out the flow chart of the method for autonomous retransmission to signal based on HARQ in the source device of cordless communication network.
In this embodiment, first perform step S11 ', receive the HARQ message from the next stage network equipment;
Secondly perform step S12 ', determine new power output according to this HARQ message;
Finally perform step S13 ', the signal of described previous transmission is retransmitted with described new power output.
Particularly, step S12 ' comprises step S121 ' and step S122 '.
In step S12 ', first perform step S121 ', received is counted the HARQ message of same signal;
Secondly perform step S122 ', determine described new power output according to the number of times of described HARQ message and the increment of each power adjustment.
Fig. 4 be of the present invention one preferred embodiment, although this preferred embodiment in include step S121 ', it will be understood by those skilled in the art that, in concrete application, step S121 ' is optional.
Particularly, when after primary network station equipment instantly receives the maximum number of retransmissions that correct re-transmitted signal or arrival presets, its power output is just reset to initial value by source device, source device can the increment of its each power pre-set, when after the HARQ message that source device receives from the next network equipment at every turn, just according to this power increment, its power output is adjusted, namely in original power output, add this power increment, obtain new power output and the signal previously sent is retransmitted.If after the next stage network equipment receives re-transmitted signal, carrying out check results to this re-transmitted signal is still mistake, then repeat above-mentioned step, until the next stage network equipment receives the maximum number of retransmissions that correct re-transmitted signal or arrival preset, the signal from source device received just is forwarded to the next stage network equipment again by the next stage network equipment, meanwhile, its output power value is reset to initial value by source device.
When source device is when being all reset to initial value by its power output after retransmitting each time, source device can the increment of its each power pre-set, after source device first time receives the HARQ message from the next network equipment, this HARQ is counted and according to pre-set increment, its power output is adjusted, namely on the initial value of power output, this predetermined power increment is added, obtain new power output to retransmit the signal previously sent, after re-transmission, again the power output of source device is reset to initial value.If after the next stage network equipment receives this re-transmitted signal, the result verified this re-transmitted signal is still mistake, then second time sends retransmission request message to source device, source device counts this HARQ message, and according to pre-set increment, its power output is adjusted, namely on the basis of power output initial value, add the value of the predetermined power increment of twice, obtain new power output to retransmit the signal previously sent, after re-transmission, again the power output of source device is reset to initial value.If after the next stage network equipment receives this re-transmitted signal, the result verified this re-transmitted signal is still mistake, then repeat above-mentioned steps, namely before third time retransmits, the basis of power output initial value adds the value of the predetermined power increment of three times, when retransmitting for the 4th time, the basis of power output initial value adds the value of the predetermined power increment of four times, when retransmitting for the N time, the basis of power output initial value adds the value of N predetermined power increment doubly, wherein, N is less than the maximum number of retransmissions preset.Until the next stage network equipment receives the maximum number of retransmissions that correct re-transmitted signal or arrival preset, the signal from source device received just is forwarded to the next stage network equipment again by the next stage network equipment.
More specifically, described predetermined power increment can set according to the concrete condition of channel.
Fig. 5 shows according to another preferred embodiment of the invention, for carrying out the flow chart of the method for autonomous retransmission to signal based on HARQ in the source device of cordless communication network.
In this embodiment, first perform step S11 ", receive the HARQ message from the next stage network equipment;
Secondly step S12 is performed ", determine new power output according to this HARQ message;
Finally perform step S13 ", the signal of described previous transmission is retransmitted with described new power output.
Particularly, step S12 " comprise step S121 " and rapid S122 ".
In step S12 " in, first perform step S121 ", adjust indication information by obtaining this power in described HARQ message;
Secondly step S122 is performed ", determine new power output according to described power adjustment indication information.
Fig. 5 be of the present invention another preferred embodiment, in this embodiment, after the next stage network equipment receives the signal from source device, code check is carried out to this signal.Described code check can comprise cyclic redundancy code (CRC) verification or parity check, the code check of other types can also be comprised, as long as can judge the correctness of the signal from source device in transmitting procedure, this is that those skilled in the art will be understood that, therefore not to repeat here.
If check results is correct, the next stage network equipment sends ack signal (ACK) to source device, and the signal from source device received is forwarded to the next stage network equipment again; If check results is mistake, the next stage network equipment sends HARQ message (ARQ, or NAK) to source device.Described source device can comprise subscriber equipment, also can comprise mobile-relay station, as long as source device can adjust its power output according to the HARQ received, this is that those skilled in the art will be understood that, therefore not to repeat here.
When after HARQ (ARQ) message that source device receives from the next stage network equipment, from this HARQ message, obtain power adjustment indication information.Particularly, described power adjustment indication information directly can comprise source device and retransmit the power output size that the signal that previously sends should adopt, or comprises the difference of power output of power output that signal that source device retransmits previously transmission should adopt and current source device.When described power adjustment indication information comprise source device retransmit the difference of the power output of power output that the signal that previously sends should adopt and current source device time, as long as this difference to be added the power output of current source device, the power output that the signal that can obtain source device re-transmission previously transmission should adopt.
Further, the concrete state of channel that described power adjustment indication information also can transmit according to current demand signal is determined adaptively.If the state of the channel that current demand signal transmits is poor, then the size that the source device that described power adjustment indication information comprises retransmits the power output needed for signal previously sent correspondingly should increase a larger amplitude on the basis of original power output; If the state of the channel that current demand signal transmits is better, then the size that the source device that described power adjustment indication information comprises retransmits the power output needed for signal previously sent correspondingly should increase a less amplitude on the basis of original power output.
After determining new power output according to described power indicative information, the signal of described previous transmission sends with described new power output by source device.If after the next stage network equipment receives re-transmitted signal, check results is still mistake, then repeat above-mentioned step, until the next stage network equipment receives the maximum number of retransmissions that correct re-transmitted signal or arrival preset, the signal from source device received just is forwarded to the next stage network equipment again by the next stage network equipment, meanwhile, its output power value is reset to initial value by source device.Further, its power output can also be set as initial value by source device after retransmitting each time, and when second time retransmits, the power output of source device again carries out power adjustment on the basis of initial power output.
Fig. 6 shows according to a specific embodiment of the present invention, for carrying out the structural representation of the automatic retransmission device of autonomous retransmission to signal based on HARQ in the source device of wireless network.Described automatic retransmission device 1 comprises receiving system 11 and signal retransmission arrangement 12.
First, receiving system 11 is for receiving the HARQ message from the next stage network equipment;
Secondly, the signal previously sent, for according to described HARQ message, retransmits with the power output increased by signal retransmission arrangement 12.
In this embodiment, after the next stage network equipment receives the signal from source device, code check is carried out to this signal.Described code check can comprise cyclic redundancy (CRC) verification or parity check, also the code check of other types can be comprised, as long as can judge the correctness of the signal from source device in transmitting procedure, this is that those skilled in the art will be understood that, therefore not to repeat here.
If check results is correct, the next stage network equipment sends ack signal (ACK) to source device, and the signal from source device received is forwarded to the next stage network equipment again; If check results is mistake, the next stage network equipment sends HARQ message (ARQ, or NAK) to source device.Described source device can comprise subscriber equipment, also can comprise mobile-relay station, as long as source device can adjust its power output according to the HARQ received, this is that those skilled in the art will be understood that, therefore not to repeat here.
In a preferred embodiment, under one or many retransmits failure scenario, receiving system 11 may receive the repeatedly HARQ (in pre-determined number) for same signal, for before making each reliability retransmitted all comparatively once transmission increase, source device needs all to do certain adjustment to each power output retransmitted.Preferably, source device can preserve each power output retransmitted, and when receiving another repeat requests, adopting aforesaid way, being added by source output power value simply can determining new output power value with this power increment value.More preferably, also by counting device, the HARQ for same signal (ARQ) message from the next stage network equipment is counted, subsequently, power determining device determines according to the increment of the number of times of described HARQ message and the adjustment of each power the new power output that this repeat requests is corresponding.
In a further advantageous embodiment, when after HARQ (ARQ) message that receiving system 11 receives from the next stage network equipment, acquisition device obtains power adjustment indication information from this HARQ message, then, power determining device determines new power output according to this power adjustment indication information.Particularly, described power adjustment indication information directly can comprise source device and retransmit the power output size that the signal that previously sends should adopt, or comprises the difference of power output of power output that signal that source device retransmits previously transmission should adopt and current source device.Further, the concrete state of channel that described power adjustment indication information also can transmit according to current demand signal is determined adaptively.
After power determining device determines new power output according to HARQ message, the signal of described previous transmission retransmits with described new power output by signal retransmission arrangement 12.
Referring to Fig. 7 and 8, above-mentioned two kinds of preferred embodiments are described in detail.
Fig. 7 shows according to a preferred embodiment of the present invention, for carrying out the structural representation of the automatic retransmission device of autonomous retransmission to signal based on HARQ in the source device of wireless network.Described automatic retransmission device 1 ' comprises receiving system 11 ', signal retransmission arrangement 12 ' and counting device 13 '; Described signal retransmission arrangement 12 ' comprises the first power determining device 123 ' and the first retransmission arrangement 124 '.Wherein, receiving system 11 ' and the receiving system 11 described in Fig. 4 are same devices, and it realizes identical function.
First, receiving system 11 ' is for receiving the HARQ message from the next stage network equipment;
Secondly, counting device 13 ' is for counting the HARQ message of same signal received;
Finally, the signal previously sent, for according to described HARQ message, is re-started re-transmission with the power output increased by signal retransmission arrangement 12 '.
Particularly, the first power determining device 123 ' in signal retransmission arrangement 12 ' is for determining described new power output according to the number of times of described HARQ message and the increment of each power adjustment;
First retransmission arrangement 124 ' is for retransmitting the signal of described previous transmission with described new power output.
In this embodiment, after the next stage network equipment receives the signal from source device, code check is carried out to this signal.Described code check can comprise cyclic redundancy (CRC) verification or parity check, also the code check of other types can be comprised, as long as can judge the correctness of the signal from source device in transmitting procedure, this is that those skilled in the art will be understood that, therefore not to repeat here.
If check results is correct, the next stage network equipment sends ack signal (ACK) to source device, and the signal from source device received is forwarded to the next stage network equipment again; If check results is mistake, the next stage network equipment sends HARQ message (ARQ, or NAK) to source device.Described source device can comprise subscriber equipment, also can comprise mobile-relay station, as long as source device can adjust its power output according to the HARQ received, this is that those skilled in the art will be understood that, therefore not to repeat here.
At the next stage network equipment to after receiving and carrying out code check from the signal of source device, receiving system 11 ' in source device receives HARQ (ARQ) message from the next stage network equipment, then, counting device 13 ' counts the HARQ message of same signal received.After to HARQ counting, the first power determining device 123 ' determines described new power output according to the increment of the number of times of described HARQ message and each power adjustment.
Fig. 7 be of the present invention one preferred embodiment, although this preferred embodiment in include counting device 13 ', it will be appreciated by those skilled in the art that, in concrete application, counting device 13 ' is optional.
When after primary network station equipment instantly receives the maximum number of retransmissions that correct re-transmitted signal or arrival presets, its power output is just reset to initial value by source device, source device can the increment of its each power pre-set, when after the HARQ message that receiving system 11 ' receives from the next network equipment at every turn, just according to this power increment, its power output is adjusted, namely in original power output, add this power increment, obtain new power output and the signal previously sent is retransmitted.If after the next stage network equipment receives re-transmitted signal, carrying out check results to this re-transmitted signal is still mistake, then repeat above-mentioned step, until the next stage network equipment receives the maximum number of retransmissions that correct re-transmitted signal or arrival preset, the signal from source device received just is forwarded to the next stage network equipment again by the next stage network equipment, meanwhile, its output power value is reset to initial value by source device.
When source device is when being all reset to initial value by its power output after retransmitting each time, source device can the increment of its each power pre-set, after receiving system 11 ' first time receives the HARQ message from the next network equipment, counting device 13 ' counts this HARQ and adjusts its power output according to pre-set increment, namely on the initial value of power output, this predetermined power increment is added, obtain new power output to retransmit the signal previously sent, after re-transmission, again the power output of source device is reset to initial value.If after the next stage network equipment receives this re-transmitted signal, the result verified this re-transmitted signal is still mistake, then second time sends retransmission request message to source device, counting device 13 ' in source device counts this HARQ message, and according to pre-set increment, its power output is adjusted, namely on the basis of power output initial value, add the value of the predetermined power increment of twice, obtain new power output to retransmit the signal previously sent, after re-transmission, again the power output of source device is reset to initial value.If after the next stage network equipment receives this re-transmitted signal, the result verified this re-transmitted signal is still mistake, then repeat above-mentioned steps, namely before third time retransmits, the basis of power output initial value adds the value of the predetermined power increment of three times, when retransmitting for the 4th time, the basis of power output initial value adds the value of the predetermined power increment of four times, when retransmitting for the N time, the basis of power output initial value adds the value of N predetermined power increment doubly, wherein, N is less than the maximum number of retransmissions preset.Until the next stage network equipment receives the maximum number of retransmissions that correct re-transmitted signal or arrival preset, the signal from source device received just is forwarded to the next stage network equipment again by the next stage network equipment.
More specifically, described predetermined power increment can set according to the concrete condition of channel.
Fig. 8 shows according to another preferred embodiment of the invention, for carrying out the structural representation of the automatic retransmission device of autonomous retransmission in the source device of wireless network.Described automatic retransmission device 1 " comprise receiving system 11 " and signal retransmission arrangement 12 "; Described signal retransmission arrangement 12 " comprise acquisition device 121 " and the second retransmission arrangement 122 "; Described second retransmission arrangement 122 " comprise the second power determining device 1221 " and retransmission device 1222 ".
First, receiving system 11 " for receiving the HARQ message from the next stage network equipment;
Secondly, signal retransmission arrangement 12 " for according to described HARQ message, the signal previously sent is re-started re-transmission with the power output increased.
Particularly, signal retransmission arrangement 12 " in acquisition device 121 " for by obtain in described HARQ message this power adjust indication information;
Signal retransmission arrangement 12 " in the second retransmission arrangement 122 " for based on described power adjustment indication information, the signal previously sent is re-started re-transmission with the power output increased;
More specifically, the second retransmission arrangement 122 " in the second power determining device 1221 " for determining new power output according to described power adjustment indication information;
Second retransmission arrangement 122 " in retransmission device 1222 " for the signal of described previous transmission is retransmitted with described new power output.
Fig. 8 be of the present invention another preferred embodiment, in this embodiment, after the next stage network equipment receives the signal from source device, code check is carried out to this signal.Described code check can comprise cyclic redundancy (CRC) verification or parity check, the code check of other types can also be comprised, as long as can judge the correctness of the signal from source device in transmitting procedure, this is that those skilled in the art will be understood that, therefore not to repeat here.
If check results is correct, the next stage network equipment sends ack signal (ACK) to source device, and the signal from source device received is forwarded to the next stage network equipment again; If check results is mistake, the next stage network equipment sends HARQ message (ARQ, or NAK) to source device.Described source device can comprise subscriber equipment, also can comprise mobile-relay station, as long as source device can adjust its power output according to the HARQ received, this is that those skilled in the art will be understood that, therefore not to repeat here.
At the next stage network equipment to after receiving and carrying out code check from the signal of source device, receiving system 11 in source device " receive from HARQ (ARQ) message of the next stage network equipment; then, signal retransmission arrangement 12 " in acquisition device 121 " from this HARQ message, obtain power adjustment indication information.Particularly, described power adjustment indication information directly can comprise source device and retransmit the power output size that the signal that previously sends should adopt, or comprises the difference of power output of power output that signal that source device retransmits previously transmission should adopt and current source device.When described power adjustment indication information comprise source device retransmit the difference of the power output of power output that the signal that previously sends should adopt and current source device time, as long as this difference to be added the power output of current source device, the power output that the signal that can obtain source device re-transmission previously transmission should adopt.
Further, the concrete state of channel that described power adjustment indication information also can transmit according to current demand signal is determined adaptively.If the state of the channel that current demand signal transmits is poor, then the size that the source device that described power adjustment indication information comprises retransmits the power output needed for signal previously sent correspondingly should increase a larger amplitude on the basis of original power output; If the state of the channel that current demand signal transmits is better, then the size that the source device that described power adjustment indication information comprises retransmits the power output needed for signal previously sent correspondingly should increase a less amplitude on the basis of original power output.
Acquisition device 121 in source device " obtain from this HARQ message power adjustment indication information after; the second power determining device 1221 " determine new power output according to described power indicative information, then, retransmission device 1222 " signal of described previous transmission is retransmitted with described new power output.If after the next stage network equipment receives re-transmitted signal, check results is still mistake, then repeat above-mentioned step, until the next stage network equipment receives the maximum number of retransmissions that correct re-transmitted signal or arrival preset, the signal from source device received just is forwarded to the next stage network equipment again by the next stage network equipment, meanwhile, its output power value is reset to initial value by source device.Further, its power output can also be set as initial value by source device after retransmitting each time, and when second time retransmits, the power output of source device again carries out power adjustment on the basis of initial power output.
Be described specific embodiments of the invention above, it is to be appreciated that the present invention is not limited to above-mentioned specific execution mode, those skilled in the art can make various sizing and amendment within the scope of the appended claims.
Claims (12)
1. in the source device of cordless communication network for carrying out a method for autonomous retransmission to signal based on HARQ, it is characterized in that, comprise the following steps:
A. the HARQ message from the next stage network equipment is received;
C. according to received each described HARQ message, retransmitted with the new power output increased by the signal previously sent, wherein said new power output can set according to the concrete condition of channel relative to the increment of present output power.
2. method according to claim 1, is characterized in that, described step c is further comprising the steps of:
C1 '. according to described HARQ message, determine new power output based on predetermined power increment;
C2 '. the signal of described previous transmission is retransmitted with described new power output.
3. method according to claim 2, is characterized in that, further comprising the steps of after described step a:
B. received is counted the HARQ message of same signal;
Wherein, described step c1 ' also comprises:
-determine described new power output according to the number of times of described HARQ message and the increment of each power adjustment.
4. method according to claim 1, is characterized in that, described HARQ message comprises power adjustment indication information, and described step c comprises the following steps:
C1. indication information is adjusted by obtaining this power in described HARQ message;
C2. based on described power adjustment indication information, the signal previously sent is retransmitted with the power output increased.
5. method according to claim 4, is characterized in that, described step c2 comprises the following steps:
-determine new power output according to described power adjustment indication information;
-signal of described previous transmission is retransmitted with described new power output.
6. the method according to any one of claim 1-5, is characterized in that, described source device comprises subscriber equipment or relay station.
7. in the source device of wireless network for carrying out an automatic retransmission device for autonomous retransmission to signal based on HARQ, it is characterized in that, comprising:
Receiving system, for receiving the HARQ message from the next stage network equipment;
Signal retransmission arrangement, for according to received each described HARQ message, retransmitted with the power output increased by the signal previously sent, wherein said new power output can set according to the concrete condition of channel relative to the increment of present output power.
8. automatic retransmission device according to claim 7, is characterized in that, described signal retransmission arrangement also comprises:
First power determining device, for according to described HARQ message, determines new power output based on predetermined power increment;
First retransmission arrangement, for retransmitting the signal of described previous transmission with described new power output.
9. automatic retransmission device according to claim 8, is characterized in that, also comprises:
Counting device, for counting the HARQ message of same signal received;
Wherein, described first power determining device is also for determining described new power output according to the number of times of described HARQ message and the increment of each power adjustment.
10. automatic retransmission device according to claim 7, is characterized in that, described HARQ message comprises power adjustment indication information, and described signal retransmission arrangement comprises:
Acquisition device, for adjusting indication information by obtaining this power in described HARQ message;
Second retransmission arrangement, for based on described power adjustment indication information, retransmits the signal previously sent with the power output increased.
11. automatic retransmission device according to claim 10, is characterized in that, described second retransmission arrangement comprises:
Second power determining device, for determining new power output according to described power adjustment indication information;
Retransmission device, for retransmitting the signal of described previous transmission with described new power output.
12. automatic retransmission device according to any one of claim 7-11, it is characterized in that, described source device comprises subscriber equipment or relay station.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| PCT/CN2007/003106 WO2009055969A1 (en) | 2007-11-01 | 2007-11-01 | Method of automatic retransmission in wireless communication network and device thereof |
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| CN101855857B true CN101855857B (en) | 2016-02-24 |
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| CN113645012A (en) | 2015-08-14 | 2021-11-12 | 索尼公司 | Electronic device and method in a wireless communication network |
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| CN1155182C (en) * | 2001-09-27 | 2004-06-23 | 华为技术有限公司 | Power control method based on mixed automatic retransmission mechanism |
| JP3679089B2 (en) * | 2002-11-20 | 2005-08-03 | 松下電器産業株式会社 | Base station apparatus and retransmission packet transmission power control method |
| SE0301076D0 (en) * | 2003-04-08 | 2003-04-08 | Ericsson Telefon Ab L M | A method in a telecommunication system |
| CN100358255C (en) * | 2004-08-11 | 2007-12-26 | 华为技术有限公司 | Affirmation information power control method for automatic retransmission request system |
| CN100449980C (en) * | 2004-11-16 | 2009-01-07 | 华为技术有限公司 | Method for regulating power of mixed automatic box transmission request system |
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