CN102111252B - Hybrid automatic repeat request-based repeat resource distribution method - Google Patents
Hybrid automatic repeat request-based repeat resource distribution method Download PDFInfo
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- CN102111252B CN102111252B CN200910265588.2A CN200910265588A CN102111252B CN 102111252 B CN102111252 B CN 102111252B CN 200910265588 A CN200910265588 A CN 200910265588A CN 102111252 B CN102111252 B CN 102111252B
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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
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1861—Physical mapping arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
Abstract
The invention discloses a hybrid automatic repeat request (HARQ)-based repeat source distribution method, which solves the problem of resource conflict caused by the inconsistency of transmission modes of a terminal and a base station. The method comprises the following steps that: in a transmission process of an HARQ data packet, when the terminal fails to transmit the data packet for the Nth time and/or the base station fails to receive the data packet for the Nth time, the base station indicates that the transmission mode for a repeat data packet changes in a downlink control signaling transmitted to the terminal, wherein the downlink control signaling at least also comprises a new transmission mode and the information of an uplink feedback channel position; after receiving and analyzing the downlink control signaling, the terminal transmits an acknowledgement (ACK) at the uplink feedback channel position, and performs transmission in the new transmission mode when the data packet is repeated for the (N+s)th time; and after receiving the ACK transmitted by the terminal, the base station distributes uplink resources according a new resource distribution mode, wherein the N and the s are both natural numbers, and the N+s is less than or equal to a maximum repeat number.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of re-transmission resource allocation methods based on mixed automatic retransfer request (Hybrid Automatic Repeat Request, referred to as HARQ).
Background technology
HARQ technology is the improvement to traditional HARQ (Automatic Repeat Request, referred to as ARQ) technology.HARQ technology combines ARQ technology and forward error correction (Forward ErrorConnection, referred to as FEC) technology, and then become fading channel while having reduced to receiving the impact of error rates of data, make wireless communication system that higher more stable data throughout can be provided.HARQ is the 4G (4 of current main flow
thgeneration, the 4th third-generation mobile communication technology) system, Long Term Evolution (Long-Term Evolution for example, one of referred to as LTE) key technology of system and IEEE (Institute of Electrical andElectronics Engineers, IEEE-USA) 802.16m system.
The working mechanism of HARQ is that transmitting terminal sends a packet to receiving terminal, receiving terminal is received after packet, according to decoding situation, send a feeding back ACK (Acknowledgement, confirm to send successfully) or NACK (Non-Acknowledgement confirms that transmission is unsuccessful) to transmitting terminal.If that transmitting terminal is received is ACK, represent transmission success, need not retransmit.If that transmitting terminal is received is NACK, represent to transmit unsuccessful, transmitting terminal can resend a packet to receiving terminal, receiving terminal again feeding back ACK or NACK to transmitting terminal.Often once transmit, the number of retransmissions RetransNum of receiving terminal and transmitting terminal needs to add 1, until just can abandon transmission while arriving maximum retransmission, carries out packet loss processing.
In Frequency Division Duplexing (FDD) (Frequency Division Duplex, referred to as FDD) system, uplink/downlink can transmit data or signal simultaneously, and HARQ mechanism is related with its resource structures.In order to reduce the system delay causing due to system link structure, and the data load on flexible allocation uplink/downlink, by a radio frames Further Division, be the subframe that a plurality of time granularities are less conventionally.Wherein, a shared number of sub frames (being time span) of packet is TTI (Transmission TimeInterval, Transmission Time Interval).For example, in the wireless frame structure shown in Fig. 1, a radio frames is divided into 8 subframes, and the principle increasing progressively in order, carries out serial number to all radio frames, is called for short frame number, and as shown in Figure 1,8 subframes are expressed as SF0-SF7.Wherein, up link has identical frame structure with down link.
At time division duplex (Time Division Duplex, referred to as TDD) in system, for based on OFDM (Orthogonal Frequency Division Multiplexing, OFDM) or OFDMA (Orthogonal Frequency Division Multiple Access, OFDM access) wireless communication system, frame structure and the resource structures of this wireless communication system of feedback procedure Main Basis of its HARQ, frame structure is described the control structure of Radio Resource in time domain, and resource structures has been described the control structure of Radio Resource on frequency domain.Frame structure is divided into Radio Resource the unit of different brackets in time domain, as superframe (Superframe), frame (Frame), subframe (Subframe) and symbol (Symbol), for example, by being set, different control channel (, broadcast channel, clean culture and Multicast Channel etc.) realizes scheduling controlling.
As shown in Figure 2, Radio Resource is divided into superframe in time domain, and each superframe comprises 4 frames, and each frame comprises 8 subframes, and subframe is comprised of 6 basic OFDM symbols.In frame structure, in each grade unit, specifically comprising bandwidth that how many OFDM symbols need to support according to real system and/or the factors such as circulating prefix-length of OFDM symbol determines.Wherein in each frame, can comprise several sub-frame of uplink and descending sub frame, the packet sending at descending sub frame sends to terminal by base station, and terminal is carried out HARQ feedback by sub-frame of uplink again; The packet sending at sub-frame of uplink equally sends to base station by terminal, and HARQ feedback is carried out by descending sub frame again in base station.
For a descending/ascending HARQ process, one or more subframes on downlink/uplink are assigned to this HARQ process, for carrying data channel, correspondingly, one or more subframes on uplink/downlink are also assigned to this HARQ process, for carrying feedback channel.For example, for an ascending HARQ process, the one or more sub-frame of uplink in up link are used for carrying data channel, and correspondingly, the one or more descending sub frames on down link are for carrying the feedback channel corresponding with data channel.
In addition, system can arrange broadcast channel or claim Broadcast Control Channel in first descending sub frame in superframe, owing to being positioned at superframe head, also referred to as superframe head (Superframe Header), and sends the system informations such as resource mapping; And the control channel that system can also arrange clean culture and/or multicast character sends the scheduling control informations such as resource distribution.Simultaneity factor can also have A-MAP (Advanced MAP, senior MAP) channel, A-MAP channel is positioned on descending sub frame, transmit Service controll information, at least can comprise Non user-specific (non-user is special-purpose) A-MAP IE (Information Element, information element), HARQ feedback (HARQ feedback) A-MAP IE, Power control (power control) A-MAP IE, one of control informations such as Assignment A-MAP IE or combination in any.In some communication system (as Wimax 16m communication system), some control information (as Nonuser-specific A-MAP IE) can send for whole users in a frequency partition or a region.According to factors such as networking technology, interference mitigation technology and types of service, resource structures is divided into a plurality of frequency partition (Frequency Partition, referred to as FP) by bandwidth available on frequency domain.
In some relevant communication standard, stipulate at present first attached bag of transmission means (for example resource transmission position) the transmission upstream data bag of stipulating in just according to IE after terminal is received a UL Basic Assignment IE (up basic distribution IE).If transmission is first failed to be received side and is correctly decoded, re-transmission can change the transmission means (for example resource transmission position) of retransmission packet, but can not change place subframe numbers.For example, if really need to change the transmission means (resource transmission position) retransmitting, need base station to send again a UL Basic Assignment IE to notify newly assigned resource to send position; If do not need to change resource, do not send position, do not send UL Basic Assignment IE, as long as terminal does not receive that UL Basic Assignment IE will send position by the resource of front UL Basic Assignment IE indication and send upstream data, so just may produce the collision problem of resource.
As shown in Figure 3, when terminal 1 sends packet failure, 1 one NACK of terminal can be given in base station, may send a UL Basic Assignment A-MAP IE to terminal 1 simultaneously, if terminal 1 is received this UL Basic Assignment A-MAP IE, can send position B by new resource and send retransmission packet, and just still can send position A transmission packet by former resource as do not received UL Basic Assignment A-MAP IE terminal 1, and resource transmission position A has likely distributed to terminal 2 uses, like this, terminal 1 and terminal 2 share resource transmission position transmission data will cause collision, two packets can not correctly be transmitted.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of re-transmission resource allocation methods based on mixed automatic retransfer request, the inconsistent and resource conflict problem of generation of the transmission means that solves terminal and base station.
In order to address the above problem, the invention provides a kind of re-transmission resource allocation methods based on mixed automatic retransfer request, in the transmitting procedure of a mixed automatic retransfer request (HARQ) packet, described method comprises:
Terminal is receiving described packet for the N time when failed sending described packet failure and/or base station for the N time, base station indicates the transmission means that retransmits described packet to change in sending to the descending control signaling of terminal, in this descending control signaling, at least also comprise: new transmission means, and uplink feedback channel positional information;
Terminal is received and is parsed after this descending control signaling, on described uplink feedback channel position, sends and confirms to send successfully (ACK), when retransmitting described packet the N+s time, according to described new transmission means, transmits;
Base station is received after the ACK of terminal transmission, according to new resource distribution mode, is distributed ascending resource;
Wherein, N, s is natural number, and N+s is less than or equal to maximum retransmission.
Further, described base station indicates the transmission means that retransmits described packet to change in the following ways:
By comprising and heavily distribute indication information in described descending control signaling, and described heavy distribution indication information gets particular value, and indication transmission means changes.
Further, described base station changes by the transmission means of the described packet of descending control signaling indication re-transmission of particular type.
Further, described descending control signaling comprises up basic assignment information element (UL BasicAssignment IE).
Further, the descending control signaling of described particular type comprises up basic heavy assignment information element (UL Basic ReAssignment IE).
Further, described terminal is received and is parsed after described descending control signaling, when retransmitting described packet the N+1 time to the N+s-1 time, still according to former transmission means, transmits, and wherein, s is more than or equal to 2.
Further, if described terminal is not received described descending control signaling, still according to former transmission means, retransmit described packet.
Further, if described base station is not received the ACK that described terminal sends or is received and confirm to send unsuccessful (NACK), still according to former resource distribution mode, distribute ascending resource, meanwhile, resend described descending control signaling or adopt more sane code check and/or modulation system to send described descending control signaling.
Further, described transmission means comprises one of following information or combination in any: resource sends position, the position of multiple-input and multiple-output mode, modulation coding mode, mixed automatic retransfer request feedback channel.
The present invention also provides a kind of re-transmission resource allocation methods based on mixed automatic retransfer request, and in the transmitting procedure of a HARQ packet, described method comprises:
Terminal is receiving described packet for the N time when failed sending described packet failure and/or base station for the N time, base station indexed resource in sending to the descending control signaling of terminal sends position and changes, and at least also comprises: new resource sends position in described control signal;
Terminal is received after described control signal, when retransmitting described packet the N+1 time, in described new resource, sends on position and transmits;
Base station is when distributing ascending resource, and the former resource that retains described terminal sends position; And knowing that described terminal sends on position and retransmits after described packet in new resource, distributes ascending resource according to new resource distribution mode;
Wherein, N is natural number, and N is less than maximum retransmission.
Further, described base station knows that terminal retransmits described packet on new resource transmission position in the following manner:
Base station comprises uplink feedback channel positional information in described descending control signaling, terminal is received after described descending control signaling, on described uplink feedback channel position, send ACK, described base station knows that according to the described ACK receiving terminal is to send on position and retransmit described packet in new resource;
Or base station knows that by Data Detection terminal is to retransmit described packet on new resource transmission position or on former resource transmission position.
Further, described base station one of in the following manner or the combination indication resource that retransmits described packet send position and change:
By comprising and heavily distribute indication information in described descending control signaling, and described heavy distribution indication information is particular value, and the resource that indication retransmits described packet sends position and changes;
By the descending control signaling of particular type, indicate the resource transmission position that retransmits described packet to change.
The present invention provides again a kind of re-transmission resource allocation methods based on mixed automatic retransfer request, and described method comprises:
Base station sends non-user's dedicated signaling for the whole terminals in a frequency partition, indicate the transmission means that whether has terminal to retransmit upstream data bag in this frequency partition to change, if indicate the transmission means of a certain terminal to change, by descending control signaling, new transmission means sent to corresponding terminal;
Terminal in described frequency partition receives after non-user's dedicated signaling, if change has occurred indication transmission means, and corresponding terminal parses goes out described descending control signaling, according to new transmission means wherein, retransmits described upstream data bag.
Further, the terminal in described frequency partition is received after described non-user's dedicated signaling, if change has occurred indication transmission means, and described descending control signaling is irrelevant with oneself, still according to former transmission means, retransmits described upstream data bag.
Further, the terminal in described frequency partition is received after described non-user's dedicated signaling, if fail to parse described descending control signaling, do not allow to send upstream data, but number of retransmissions is added 1;
Base station knows that terminal does not solve after described descending control signaling, resends described descending control signaling or sends the higher descending control signaling of robustness.
Further, described non-user's dedicated signaling comprises non-user-specific information element (Non-userSpecific A-MAP IE), and described descending control signaling comprises up basic assignment information element (ULBasic Assignment A-MAP IE).
HARQ provided by the invention retransmits resource allocation methods, has solved a plurality of up users and has shared the problem that channel transmission data may exist conflict, has reduced the error rate, and then has improved the efficiency of transmission of system.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, for explaining the present invention, is not construed as limiting the invention together with embodiments of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of radio frames;
Fig. 2 is the frame structure schematic diagram of wireless communication system;
Fig. 3 is that ascending HARQ retransmits the schematic diagram bumping;
Fig. 4 is the schematic flow sheet of the re-transmission resource allocation methods of application example of the present invention;
Fig. 5 is the schematic flow sheet of the re-transmission resource allocation methods of Another Application example of the present invention.
Embodiment
Re-transmission resource allocation methods provided by the invention adopts following technical scheme:
Scheme one
This scheme mainly comprises the steps:
In the transmitting procedure of a HARQ packet, at N, (N is natural number to terminal, and N is less than or equal to maximum retransmission R) this packet failure of inferior transmission, and/or at the N time, (N is natural number in base station, and N is less than maximum retransmission R) while receiving the failure of this packet, base station indicates the transmission means that retransmits this packet to change in sending to the descending control signaling of terminal, in this descending control signaling, at least also comprise: new transmission means, and uplink feedback channel positional information;
Terminal is received after this descending control signaling, on described uplink feedback channel position, send and confirm to send successfully (ACK), when N+s (s is natural number, and N+s is less than or equal to maximum retransmission R) this packet of inferior re-transmission, according to described new transmission means, transmit;
Base station is received after the ACK of terminal transmission, according to new resource distribution mode, is distributed ascending resource.
Preferably, base station in the following ways indicating terminal transmission means change:
1, by the descending control signaling of particular type, indicate transmission means whether to change, as signaling type 1 represents that transmission means does not change, 2 of signaling types represent that transmission meanss change; And/or
2, by the indication information in the descending control signaling of same type, indicate, as comprising in the descending control signaling sending, base station heavily distributes (Reassignment) indication information, whether the transmission means that is used to indicate re-transmission upstream data changes, when the value of this Reassignment is a certain particular value (as 1), indication transmission means changes.
Preferably, if adopt aforesaid way 2, when in the descending control signaling that base station sends, Reassignment information equals 0 (or a certain particular value), this descending control signaling is used to indicate a packet of the first biography of terminal, or transmission means does not change.Also be, if do not need to change the transmission means of upstream data when retransmitting, base station does not need to send a descending control signaling, when terminal is not received descending control signaling, still according to primary transmission means (as sent for the first time the position of data), sends upstream data.Only, when needs change the transmission means that retransmits upstream data, base station is just sent out a descending control signaling again.
In addition, because base station is just to redistribute ascending resource after receiving the described ACK that terminal sends, for assurance terminal is consistent with the transmission means of base station, terminal is received after the indication that transmission means changes, when sending described ACK, this re-transmission will be transmitted according to former transmission means.
For example, base station sends signaling S1 to terminal, a packet of the first biography of indicating terminal, and in described signaling, Reassignment information equals 0 (or a certain determined value);
If terminal is at the N time, (N is more than or equal to 1 and be less than maximum retransmission R, N wherein, R is the integer that is more than or equal to 1) transmission data failure, and base station need to change the transmission means that retransmits this packet, base station need to send a signaling S2 by down channel to terminal before the N+1 time transmission, information Reassignment wherein equals 1 (or a certain determined value), the transmission means of designation data bag changes, and in signaling S2, notify new transmission means, also have the feedback channel location index of an information indicating finger to information S2 simultaneously;
Terminal is by solution content wherein after receiving signaling S2, and the position of learning feedback channel, does not first retransmit and use the transmission means of new indication to send data at the N+1 time, but still according to the transmission means of the N time transmission, send upstream data bag.Meanwhile, send an acknowledge message ACK on the feedback channel position of appointment, informing base station corresponding terminal has been received signaling S2;
Base station confirms that signaling S2 is gone out by terminal parses after receiving ACK, if (m is natural number to also have N+1+m, and N+1+m is less than or equal to R) inferior re-transmission, base station receives packet according to the transmission means of indicating in S2 when the inferior retransmission packet of N+1+m (m is natural number, and N+1+m is less than or equal to R) receives.If the acknowledge message ACK that terminal sends on feedback channel is not received in base station, think that corresponding terminal do not receive signaling S2, (m is natural number to N+1+m, and N+1+m is less than or equal to R) still can use during inferior reception retransmission data packet may the N time and transmission means that the N+1 time transmission used receives, rather than the transmission means of indicating in signaling S2.
Wherein, base station sends above-mentioned signaling S1 and S2 can have identical or different configuration and content.
Further, in ascending HARQ mechanism, base station sends the transmission means of upstream data by descending control signaling notification terminal, described transmission means comprises one of following or combination: resource sends position, the position of MIMO (Multiple Input Multiple Output, multiple-input and multiple-output) mode, modulation coding mode, HARQ feedback channel.Wherein, resource sends position and refers to packet occupied subcarrier on time domain and frequency domain in communication system.MIMO mode refers to the mode that system is carried out many antennas STC (SpaceTime Coding, Space Time Coding), maybe can claim MIMO code check.Modulation coding mode refers to modulator approach and the coding method of using when resource sends.The position of HARQ feedback channel refers to HARQ feedback information occupied subcarrier on time domain and frequency domain in communication system.
Scheme two
This scheme mainly comprises the steps:
In the transmitting procedure of a HARQ packet, at the N time, (N is natural number to terminal, and N is less than or equal to maximum retransmission R) send this packet unsuccessfully, base station indicates the resource transmission position that retransmits this packet to change in sending to the descending control signaling of terminal, at least also comprises: new resource sends position in this control signal;
Terminal is received after this control signal, when retransmitting this packet the N+1 time, in new resource, sends on position and transmits;
Base station is when distributing ascending resource, and the former resource that retains described terminal sends position, and is knowing that terminal sends on position and retransmits after upstream data in described new resource, distributes ascending resource according to new resource distribution mode.
Wherein, whether base station changes indexed resource transmission position in the following ways:
1, by dissimilar descending control signaling, indicate, as signaling type 1 represents that transmission means does not change, 2 of signaling types represent that transmission means changes; And/or
2, by the indication information in the descending control signaling of same type, indicate, as base station comprises in the descending control signaling sending, heavily distribute (Reassignment) indication information, by the different values of this Reassignment, indicate the transmission means that retransmits upstream data bags whether to change.
2 is example in the above described manner, if terminal is at the N time, (N is more than or equal to 1, be less than maximum retransmission R) transmission data failure, and base station need to change the transmission means that retransmits this packet, to terminal, send the new transmission means of descending control signaling S3 notification terminal, and for the first time re-transmission (the N+1 time) of new transmission means after this descending control signaling S3 receives comes into force.
Terminal is received after signaling S3, if Reassignment equals 1 (or a certain determined value), retransmits for the N+1 time just according to new transmission means transmission packet.Now, base station is when distributing upstream data resource, and by retain for this terminal simultaneously, new resource sends position and former resource sends position.If terminal parses has gone out corresponding signaling S3, by the transmission means transmission packet with new; If terminal does not parse corresponding signaling S3, still with old transmission means transmission packet.
In this scheme, base station can adopt following two kinds of modes to confirm whether terminal parses signaling S3:
A, the position of feedback channel is notified in base station in signaling S3, and terminal sends ACK to terminal after receiving signaling S3 on the feedback channel position of appointment, and informing base station has parsed signaling S3;
B, base station is without notification terminal feedback channel position in signaling S3, and terminal also need not send uplink feedback information ACK/NACK to base station.Data Detection can be passed through in base station, learns that terminal is according to new transmission means or former transmission means transmission data, thereby learns whether terminal parses signaling S3.
Scheme three
This scheme mainly comprises the steps:
Base station sends non-user's dedicated signaling for the whole terminals in a frequency partition, whether indicate in this frequency partition has the transmission means of terminal to change, if indicate the transmission means of a certain terminal to change, by descending control signaling, new transmission means sent to corresponding terminal;
Terminal in described frequency partition receives after non-user's dedicated signaling, if change has occurred indication transmission means, and counterpart terminal parses described descending control signaling, according to new transmission means wherein, retransmits upstream data;
When base station knows that by Data Detection terminal retransmits upstream data according to new transmission means, according to new resource distribution mode, distribute ascending resource.
Further, if counterpart terminal fails to parse described descending control signaling, do not allow to retransmit upstream data;
The unaltered terminal of other transmission meanss, after knowing that according to STID described descending control signaling and oneself are irrelevant, still retransmits upstream data according to former transmission means; If it is irrelevant with oneself that the unaltered terminal of other transmission meanss fails to parse described descending control signaling, equally do not allow to retransmit upstream data yet.
Like this, Data Detection can be passed through in base station, which terminal not to send upstream data according to, can determine the terminal of failing to parse described descending control signaling.If change the terminal of transmission means, fail to parse described descending control signaling, base station need to resend described descending control signaling for described terminal, until described terminal correctly parses described descending control signaling or reaches maximum retransmission.In addition, base station also can determine by the ACK of terminal whether terminal receives control signal.
Preferably, in this scheme, if terminal is at the N time, (N is more than or equal to 1, be less than maximum retransmission R) transmission data failure, and this packet A has changed transmission means in re-transmission, base station can above send the indication information of a bit by the control signal S4 (as the Non-user Specific A-MAP IE in 16m communication system) of whole terminals in for a frequency partition, and whether the transmission means that this indication information is used to indicate a terminal in frequency partition changes.If this information is 0 (or a certain determined value), illustrate and do not have the transmission means of terminal to change, even if terminal does not parse some or some control signal (as the UL Basic Assignment A-MAP IE in 16m communication system), but know that these control signals and oneself are irrelevant, the transmission means that still can use according to last time transmission sends.If this information is 1 (or a certain determined value), explanation has the transmission means of some or some terminal that change has occurred, these terminals must parse whole control signals or just can transmit data with own relevant control signal, otherwise do not allow to retransmit upstream data bag.The for the first time re-transmission (the N+1 time) of new transmission means after this descending control signaling S4 receives comes into force.For the terminal that does not parse A-MAP IE, even without sending the corresponding number of retransmissions of data, also must add 1, to guarantee the consistent of base station and terminal number of retransmissions.
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described.If do not conflicted, the feature in each embodiment of the application and embodiment can combine mutually.
Embodiment mono-
In the present embodiment, by up basic distribution A-MAP IE (UL BasicAssignment A-MAP IE in communication system, hereinafter also referred to as A-MAP IE) as descending control signaling, and using a bit in A-MAP IE as ReAssignment indication information.If ReAssignment=0, illustrate that so this UL Basic Assignment A-MAP IE is the A-MAP IE to new data packets, after terminal parses goes out, transmission means as indicated sends packet at once, and base station also receives packet according to corresponding transmission means; If ReAssignment=1, illustrates that this ULBasic Assignment A-MAP IE distributes the resource again of retransmission data packet may.
It is example that the resource of take below in transmission means sends position, to retransmitting resource allocation flow, is further described.As shown in Figure 4, the A-MAP IE that terminal 1 sends according to base station, while transmitting for the first time packet failure on resource transmission position A, base station is sent on the B of position and retransmits in new resource by A-MAP IE indication, terminal 1 is after receiving this A-MAP IE signaling, when this (for the second time) transmits, still in the resource of not upgrading, send on the A of position and send data, and need to receive this A-MAP IE by a uplink feedback channel transmission ACK/NACK informing base station.Base station is after receiving the ACK of 1 couple of this A-MAPIE of terminal, just can be when upper once (for the third time) transmit by new resource distribution mode, distribute ascending resource, so the next retransmission time ability onset that need to send of this UL Basic Assignment A-MAP IE.
As shown in Figure 5, in step (5), if the ACK of the A-MAP IE sending in 1 pair of step of terminal (4) is not received in base station, or receive NACK, base station thinks that terminal 1 do not receive corresponding UL Basic Assignment A-MAP IE so, base station changes the indication sending in repeating step (4) the A-MAP IE of transmission means, until step (9) is received after the ACK of terminal 1 transmission, just can when the 4th transmission, by new resource distribution mode, distribute ascending resource, in resource, send the ascending resource of position B distributing terminals 1.In addition, base station receives after the ACK that terminal 1 sends, and confirms that terminal receives indication, the former resource of terminal 1 can be sent to position A and distribute to other terminal (as terminal 2).
In the present embodiment, when ReAssignment=0, the downstream feedback channel position of the HFA denoting signaling upstream data in UL Basic Assignment A-MAP IE.When ReAssignment=1, the channel of the HFA signaling indication in UL Basic Assignment A-MAP IE represents the uplink feedback channel position of UL BasicAssignment A-MAP IE.Like this, only need to increase 1bit expense adding on UL BasicAssignment A-MAP IE.
Embodiment bis-
The realization flow of the present embodiment and embodiment mono-are basic identical, also need base station assigns for a uplink HARQ feedback channel of A-MAPIE, and base station just can, according to new mode Resources allocation, that is to say and need to wait for that a frame time could onset after receiving the ACK that terminal sends.
Be with the difference of embodiment mono-, the present embodiment carries out certain improvement on the basis of embodiment mono-, has defined a brand-new A-MAP IE signaling, i.e. up basic heavy assignment information element (ULBasic ReAssignment A-MAP IE).Whether, in the present embodiment, base station is without comprise indication information in descending control signaling, but change by UL Assignment A-MAP IE and two kinds of signaling type indicating terminal transmission meanss of UL ReAssignmentA-MAP IE.When base station needs indicating terminal to change transmission means, by the new transmission means of this UL ReAssignment A-MAP IE signaling terminal.In addition, the content of this UL ReAssignment A-MAP IE signaling is compared more succinct with the UL Basic Assignment A-MAP IE in embodiment mono-.Because some basic information had sent and can not change in previous UL Basic Assignment A-MAP IE, for example represent the signaling Long TTI Indicator of attached bag length, the signaling ACID of expression user's HARQ channel label, so can dispense in UL Basic ReAssignment A-MAP IE, the basic information content such as resource indication information, A-MAP IE feedback channel index, IE Type (IE type) need only be comprised, bit expense can be suitably reduced like this.
Embodiment tri-
The present embodiment is optimized in the enterprising step in the basis of embodiment mono-and embodiment bis-, do not need to define new A-MAP IE signaling, still a Reserved (reserving) bit in existing UL Basic Assignment A-MAP IE is used as to ReAssignment indication information.When ReAssignment=0, other information formats in UL Basic Assignment A-MAP IE are constant, it is still 56bit content, when Re Assignment=1, the information content sending in initial UL Basic Assignment A-MAP IE can be saved, therefore, can save part expense.
In fact, the present embodiment is compared with embodiment bis-, both differences are, when ReAssignment=1, need not define a new signaling type, but carry out certain modification for present UL Basic AssignmentA-MAP IE, can delete the information that has comprised and can not change in the UL Basic AssignmentA-MAP IE sending for the first time, such as representing the signaling Long TTI Indicator of attached bag length, represent the signaling ACID etc. of user's HARQ channel label, thereby can save a lot of expenses.
Embodiment tetra-
Current existing Non-user Specific A-MAP IE is the information for all user sends on frequency partition, and the send mode that Non-user Specific A-MAP IE is used is more sane than other IE, other IE of likelihood ratio that Non-user Specific A-MAP IE parses are high.In the present embodiment, can be at the information Reassignment Bit of a bit of Non-user Specific A-MAP IE definition, public by all terminals, as long as the Resource Index (resource index) of any one terminal has been redistributed in base station, Reassignment just puts 1, otherwise while not having the Resource Index of terminal to be reallocated, Reassignment is defaulted as 0.If base station need to change the Resource Index of a terminal, not only Reassignment be put to 1, also will send a UL Basic Assignment A-MAP IE and notify the resource index after corresponding terminal changes (being that resource sends position).
When terminal parses goes out Non-user Specific A-MAP IE and obtains Reassignment=0, illustrate and do not have the Resource of terminal Index to change, even without parsing other IE, still can on original position, send data.
If terminal parses goes out Reassignment=1, must parse corresponding UL BasicAssignment A-MAP IE and could send data, no matter whether the resource of oneself changes, corresponding UL Basic Assignment A-MAP IE comes into force at once after acceptance, without any need for feeding back to base station.
If terminal does not parse UL Basic Assignment A-MAPIE when Reassignment=1, no matter be, originally just do not have or do not have solution out, all can not send on position and send data in corresponding resource, base station can learn that certain terminal does not solve A-MAP IE by following manner:
(1) terminal that solves UL Basic Assignment A-MAP IE has the ACK/NACK feedback for this A-MAP IE.
(2) detect which piece resource location and do not send data, because base station sends position different resource, given each terminal, therefore, base station can determine which terminal does not parse A-MAP IE by this corresponding relation.
For the terminal that does not parse A-MAP IE and Resource Index and change, the same operation will be carried out at next frame (N+1 frame) in base station, send Non-user Specific A-MAP IE and UL Basic Assignment A-MAP IE, until packet correctly parses or reaches maximum retransmission.For not parsing the A-MAP IE relevant to self and Resource Index, there is no the terminal changing, next frame (N+1 frame) does not allow to send upstream data bag.
For the terminal that does not parse A-MAP IE; even without sending the corresponding number of retransmissions RetransNum of data, also must add 1; consistent to guarantee the RetransNum of base station and terminal; that is to say; even if terminal does not pass packet, arrived the moment that passes packet, RetransNum adds 1 automatically.
Embodiment five
In some relevant communication standard, A-MAP IE is not made an amendment at present, when a UL Basic Assignment A-MAP IE who requires terminal to change transmission packet position sends to after terminal, if that receive when this transmission receives feedback base station is NACK, need to use to A-MAP IE more steadily and surely or the most sane code check and/or modulation system (such as 1/4 code check being changed into 1/8 code check, or change QPSK modulation into BPSK modulation) UL Basic Assignment A-MAP IE is sent once when retransmit next time again, to guarantee that terminal is more prone to parse the UL Basic AssignmentA-MAP IE of current transmission.
Embodiment six
In some communication system, HARQ is longer dispatching cycle regularly, can further improve the method for previous embodiment.Terminal when base station sends after the transmission position change of UL Basic Assignment A-MAP IE or the notifying changed terminal packet of other A-MAP IE, after terminal is received A-MAP IE and is parsed, if send upstream data bag apart from terminal, also have the long period, terminal can send ACK/NACK before sending retransmission data packet may.Base station is receiving that ACK/NACK retransmits the distribution of resource again, if receive ACK, according to the indication in up-to-date A-MAP IE, carry out resource distribution and receive upstream data bag, if receive NACK or do not receive ACK, according to original method, carry out resource distribution and receive upstream data bag.Like this can be so that the terminal of base station send UL BasicAssignment A-MAP IE or other A-MAP IE can just come into force in the re-transmission for the first time after transmission, rather than its re-transmission for the second time after sending comes into force.
Embodiment seven
The present embodiment carries out certain improvement on the basis of previous embodiment, do not define new A-MAPIE signaling type, when terminal cannot correctly parse A-MAP IE and maybe cannot determine whether relevant for oneself A-MAP IE, in the position of distributing, do not send any data, to avoid the upstream data bag of a plurality of terminals to bump, data can be found not send in some resource according to corresponding some prior art in base station.Do not need so up HARQ feedback channel base station just to know whether terminal parses corresponding A-MAP IE.For not parsing corresponding A-MAP IE and resource, send the terminal that position changes, base station is by resending the A-MAP IE that robustness is higher or identical upper while once transmitting, so that terminal is more prone to parse the UL Basic Assignment A-MAP IE of current transmission.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being encompassed in the protection range of the claims in the present invention.
Claims (15)
1. the re-transmission resource allocation methods based on mixed automatic retransfer request, is characterized in that, in the transmitting procedure of a mixed automatic retransfer request HARQ packet, described method comprises:
Terminal is receiving described packet for the N time when failed sending described packet failure and/or base station for the N time, base station indicates the transmission means that retransmits described packet to change in sending to the descending control signaling of terminal, in this descending control signaling, at least also comprise: new transmission means, and uplink feedback channel positional information;
Terminal is received and is parsed after this descending control signaling, sends and confirm to send successful ACK on described uplink feedback channel position, when retransmitting described packet the N+s time, according to described new transmission means, transmits;
Base station is received after the ACK of terminal transmission, according to new resource distribution mode, is distributed ascending resource;
Wherein, N, s is natural number, and N+s is less than or equal to maximum retransmission.
2. the method for claim 1, is characterized in that,
Described base station indicates the transmission means that retransmits described packet to change in the following ways:
By comprising and heavily distribute indication information in described descending control signaling, and described heavy distribution indication information gets particular value, and indication transmission means changes.
3. the method for claim 1, is characterized in that,
Described base station changes by the transmission means of the described packet of descending control signaling indication re-transmission of particular type.
4. method as claimed in claim 2, is characterized in that,
Described descending control signaling comprises up basic assignment information element UL Basic Assignment IE.
5. method as claimed in claim 3, is characterized in that,
The descending control signaling of described particular type comprises up basic heavy assignment information element UL Basic ReAssignment IE.
6. the method for claim 1, is characterized in that,
Described terminal is received and is parsed after described descending control signaling, when retransmitting described packet the N+1 time to the N+s-1 time, still according to former transmission means, transmits, and wherein, s is more than or equal to 2.
7. the method as described in any one of claim 1 to 6, is characterized in that,
If described terminal is not received described descending control signaling, still according to former transmission means, retransmit described packet.
8. the method as described in any one of claim 1 to 6, is characterized in that,
If described base station is not received the ACK that described terminal sends or is received and confirm to send unsuccessful NACK, still according to former resource distribution mode, distribute ascending resource, meanwhile, resend described descending control signaling or adopt more sane code check and/or modulation system to send described descending control signaling.
9. the method as described in any one of claim 1 to 6, is characterized in that,
Described transmission means comprises one of following information or combination in any: resource sends position, the position of multiple-input and multiple-output mode, modulation coding mode, mixed automatic retransfer request feedback channel.
10. the re-transmission resource allocation methods based on mixed automatic retransfer request, is characterized in that, in the transmitting procedure of a mixed automatic retransfer request HARQ packet, described method comprises:
Terminal is receiving described packet for the N time when failed sending described packet failure and/or base station for the N time, base station indexed resource in sending to the descending control signaling of terminal sends position and changes, and at least also comprises: new resource sends position in described control signal;
Terminal is received after described control signal, when retransmitting described packet the N+1 time, in described new resource, sends on position and transmits;
Base station is when distributing ascending resource, and the former resource that retains described terminal sends position; And knowing that described terminal sends on position and retransmits after described packet in new resource, distributes ascending resource according to new resource distribution mode;
Wherein, N is natural number, and N is less than maximum retransmission.
11. methods as claimed in claim 10, is characterized in that,
Described base station knows that terminal retransmits described packet on new resource transmission position in the following manner:
Base station comprises uplink feedback channel positional information in described descending control signaling, terminal is received after described descending control signaling, on described uplink feedback channel position, send and confirm to send successful ACK, described base station knows that according to the described ACK receiving terminal is to send on position and retransmit described packet in new resource;
Or base station knows that by Data Detection terminal is to retransmit described packet on new resource transmission position or on former resource transmission position.
12. methods as described in claim 10 or 11, is characterized in that,
Described base station one of in the following manner or the combination indication resource that retransmits described packet send position and change:
By comprising and heavily distribute indication information in described descending control signaling, and described heavy distribution indication information is particular value, and the resource that indication retransmits described packet sends position and changes;
By the descending control signaling of particular type, indicate the resource transmission position that retransmits described packet to change.
13. 1 kinds of re-transmission resource allocation methods based on mixed automatic retransfer request, is characterized in that, described method comprises:
Base station sends non-user's dedicated signaling for the whole terminals in a frequency partition, indicate the transmission means that whether has terminal to retransmit upstream data bag in this frequency partition to change, if indicate the transmission means of a certain terminal to change, by descending control signaling, new transmission means sent to corresponding terminal;
Terminal in described frequency partition receives after non-user's dedicated signaling, if change has occurred indication transmission means, and corresponding terminal parses goes out described descending control signaling, according to new transmission means wherein, retransmits described upstream data bag; Terminal in described frequency partition is received after described non-user's dedicated signaling, if fail to parse described descending control signaling, do not allow to send upstream data, but number of retransmissions is added 1;
Base station knows that terminal does not solve after described descending control signaling, resends described descending control signaling or sends the higher descending control signaling of robustness.
14. methods as claimed in claim 13, is characterized in that,
Terminal in described frequency partition is received after described non-user's dedicated signaling, if change has occurred indication transmission means, and described descending control signaling is irrelevant with oneself, still according to former transmission means, retransmits described upstream data bag.
15. methods as described in claim 13 or 14, is characterized in that,
Described non-user's dedicated signaling comprises non-user-specific information element Non-user Specific A-MAP IE, and described descending control signaling comprises up basic assignment information element UL Basic Assignment A-MAP IE.
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| CN200910265588.2A CN102111252B (en) | 2009-12-25 | 2009-12-25 | Hybrid automatic repeat request-based repeat resource distribution method |
| PCT/CN2010/073430 WO2010148917A1 (en) | 2009-12-25 | 2010-06-01 | Method, base station and terminal for assigning re-transmission resources based on hybrid automatic repeat request |
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| CN102271032B (en) * | 2011-08-09 | 2014-11-19 | 电信科学技术研究院 | Method, system and device for realizing uplink feedback |
| CN103580831B (en) * | 2012-07-24 | 2019-03-01 | 北京三星通信技术研究有限公司 | The method and apparatus for transmitting HARQ-ACK information |
| WO2016000213A1 (en) * | 2014-07-01 | 2016-01-07 | 华为技术有限公司 | Communication method and device, user equipment and communication system |
| CN105337709B (en) * | 2014-07-31 | 2018-10-30 | 成都鼎桥通信技术有限公司 | HARQ computational methods and device |
| CN106921474B (en) * | 2015-12-24 | 2020-12-25 | 华为技术有限公司 | Method, device and system for sending uplink retransmission data |
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| CN108242989B (en) * | 2016-12-27 | 2022-07-15 | 中兴通讯股份有限公司 | Data transmission method, data demodulation method, device and terminal |
| CN108259126B (en) * | 2016-12-29 | 2020-12-15 | 华为技术有限公司 | Phase noise reference signal transmission method and device |
| CN109474382B (en) * | 2017-09-08 | 2021-05-14 | 电信科学技术研究院 | Data transmission method, base station and terminal |
| CN108288996A (en) * | 2018-04-18 | 2018-07-17 | 惠州学院 | Based on unmanned plane shooting video high-fidelity teletransmission method, apparatus, storage medium and electronic equipment |
| CN110944391A (en) * | 2018-09-25 | 2020-03-31 | 华为技术有限公司 | Communication method and device |
| CN111211880B (en) * | 2018-11-21 | 2022-04-22 | 中国信息通信研究院 | Uplink non-orthogonal multiple access transmission feedback method, device and system |
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