CN101674167A - Constant allocation mode-based data communication method and communication system - Google Patents
Constant allocation mode-based data communication method and communication system Download PDFInfo
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- CN101674167A CN101674167A CN 200810160867 CN200810160867A CN101674167A CN 101674167 A CN101674167 A CN 101674167A CN 200810160867 CN200810160867 CN 200810160867 CN 200810160867 A CN200810160867 A CN 200810160867A CN 101674167 A CN101674167 A CN 101674167A
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Abstract
The invention provides a constant allocation mode-based data communication method and a communication system. The method comprises that: a transmitting end transmits constant allocated data to a receiving end in a constant allocation area; when needing to retransmit the constant allocated data, a system divides a retransmission area which corresponds to the constant allocation area and is used forthe retransmission in real time in transmission resources; and the transmitting end retransmits the constant allocated data to the receiving end in the retransmission area. By defining the retransmission area and adopting a packet and asynchronization HARQ mechanism, the constant allocation mode-based data communication method and the communication system improve a constant allocation scheme, wherein the packet refers to transmitting retransmitted packets in the retransmission area in a centralized way; and the asynchronization refers to that the retransmission areas in each wireless frame can be different. The constant allocation mode-based data communication method and the communication system reduce resource retransmission overhead, solve the problem of resource holes in the retransmission areas, avoid resource waste and improve the utilization ratio of the resources.
Description
Technical field
The present invention relates to the mobile communication technology field, be specifically related to a kind of data communications method and communication system based on constant allocation mode.
Background technology
Mix and retransmit (Hybrid Automatic Retransmission Request automatically, abbreviate HARQ as) be automatic re-transmission (Automatic Retransmission Request, abbreviate ARQ as) and forward error correction coding (Forward Error Correction abbreviates FEC as) unite the technology of use.
Constant-scheduling (Persistent Allocation), be meant Resource Block regular hour scope intercycle distribute to fixing user, to adapt to some periodicity, the fixed-size business of payload, as VoIP (Voice over Intemet Protocol, internet voice) characteristics can be saved the overhead that resource mapping information is brought like this.The resource of constant-scheduling and modulation coding mode remained unchanged in the constant-scheduling valid period, cancelled up to constant distribution.TDD-OFDM (Time DivisionDuplex-Orthogonal Frequency Division Multiplexing, TDD OFDM) the constant-scheduling zone in the system as shown in Figure 1, the zone is the resource of descending constant-scheduling shown in its bend grid, and the zone is the resource of up constant-scheduling shown in the vertical-horizontal gauze lattice; A radio frames is made of 8 subframes, and the cycle of constant-scheduling is that 4 radio frames are distributed once.
For the business of constant-scheduling, user's data was dispatched with certain cycle, and as shown in Figure 1, a constant-scheduling cycle is 4 radio frames.Every through a dispatching cycle, the resource constant distribution of this position is given corresponding user, cancels this business up to this user.Like this, need not carry out the resource allocation indication at every turn, only need original allocation and finish to distribute, and the effective period that indicates distribution.
In standard 802.16e, for the re-transmission under the constant-scheduling, employing be asynchronous HARQ mode, each retransmission packet all needs information such as resource indication, modulation coding mode like this, if the packet that retransmits increases, will cause expense to increase.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of data communications method and communication system based on constant allocation mode, the expense that can reduce to retransmit, and reduce complexity, adapt to the constant-scheduling characteristics more.
In order to address the above problem, the invention provides a kind of data communications method based on constant-scheduling, comprising:
Transmitting terminal sends the constant-scheduling data to receiving terminal on the constant-scheduling zone;
When needing to retransmit described constant-scheduling data, what system was real-time marks off in transfer resource corresponding to the described constant-scheduling re-transmission zone, that be used for this re-transmission zone at every turn;
Transmitting terminal retransmits described constant-scheduling data to receiving terminal on described re-transmission zone.
Further, the re-transmission zone that marks off in transfer resource that system is real-time is meant:
The position and the size of this shared transfer resource in zone specified as retransmitting the zone in zone of Dynamic Definition in transfer resource, base station in retransmitting map information.
Further, the re-transmission zone that marks off in transfer resource that system is real-time is meant:
The base station selects a conduct to retransmit the zone from broadcast message in the predefined semi-static zone, this re-transmission area relative presumptive area of indication is ID number in retransmitting map information;
When the re-transmission zone varied in size with described presumptive area, the variable quantity of re-transmission zone with respect to described presumptive area indicated in the base station in retransmitting map information.
Further, when the constant-scheduling zone is positioned at n radio frames, be positioned at the n+i * RTT radio frames with re-transmission zone corresponding, that be used for the re-transmission of i secondary data, this constant-scheduling zone; Described RTT is for mixing the retransmission time interval that retransmits automatically.
Further, in the same radio frames, be associated in corresponding to the re-transmission region class in different constant-schedulings zone and form a big re-transmission zone together.
Further, need retransmit described constant-scheduling data conditions comprises: the constant-scheduling data that be not received the entirely true reception of end in the first constant-scheduling data that transmit on the constant-scheduling zone, retransmit on the re-transmission zone are not received the entirely true reception of end;
Transmitting terminal is meant retransmitting described constant-scheduling data to receiving terminal on the described re-transmission zone: when once transmitting described constant-scheduling data before transmitting terminal sends, be not received in the corresponding region and rectify the constant-scheduling data that really receive.
Further, transmitting terminal retransmits described constant-scheduling data to receiving terminal and is meant on described re-transmission zone:
According to preceding when once transmitting described constant-scheduling data in the corresponding region ACK/NACK information of son burst retransmit the son burst, be the son burst of NACK for feedback information, transmitting terminal resends to receiving terminal in retransmitting the zone; For feedback information is the son burst of ACK feedback, and transmitting terminal does not resend in retransmitting the zone.
Further, described method also comprises:
Be the resource cavity that the son burst of ACK causes in retransmitting the zone for feedback information, the son burst of base station after with the resource cavity moved to retransmitting regional section start successively, makes to retransmit that each height burst is connected in the zone; The size that retransmits the zone equals the summation of the sub size that happens suddenly of data of each re-transmission.
Further, transmitting terminal is the base station, and when receiving terminal was terminal, this method specifically comprised:
A, base station send the constant-scheduling data to terminal on descending constant-scheduling zone;
B, terminal are fed back the ACK/NACK information that happens suddenly for each data with the form of feedback index bit mapping bitmap;
C, when having nack message, the base station is real-time marking off corresponding to the described constant-scheduling re-transmission zone, that be used for this re-transmission zone in transfer resource, and by retransmitting map information notice terminal, carry out step D;
When not having nack message, the constant-scheduling transfer of data in this constant-scheduling cycle is finished;
D, be the son burst of NACK for feedback information, the base station resends to terminal in retransmitting the zone; For feedback information is the son burst of ACK feedback, and the base station does not resend in retransmitting the zone;
The base station sends to terminal with described feedback index bitmap; Receive in the son burst of terminal according to described feedback index bitmap nack message correspondence in retransmitting the zone; Return step B.
Further, transmitting terminal is a terminal, and when receiving terminal was the base station, this method specifically comprised:
A, terminal send the constant-scheduling data to the base station on descending constant-scheduling zone;
The ACK/NACK information that happens suddenly for each data is fed back with the form of feedback index bit mapping bitmap in b, base station;
When having nack message, what the base station was real-time marks off in transfer resource corresponding to the described constant-scheduling re-transmission zone, that be used for this re-transmission zone, and by retransmitting map information notice terminal, carries out step c;
When not having nack message, the constant-scheduling transfer of data in this constant-scheduling cycle is finished;
C, be the son burst of NACK for feedback information, terminal resends to the base station in retransmitting the zone; For feedback information is the son burst of ACK feedback, and terminal does not resend in retransmitting the zone;
Receive in the son burst of d, base station terminal nack message correspondence in retransmitting the zone; Return step b.
The present invention also provides a kind of communication system based on constant-scheduling, comprising: base station and terminal; On up direction, terminal is as transmitting terminal, and the base station is as receiving terminal; On down direction, the base station is as transmitting terminal, and terminal is as receiving terminal; Transmitting terminal sends the constant-scheduling data to receiving terminal on the constant-scheduling zone;
The base station is used for when each needs retransmit described constant-scheduling data, real-time in transfer resource, mark off regional and notify terminal corresponding to the re-transmission zone, that be used for this re-transmission of described constant-scheduling;
Transmitting terminal retransmits described constant-scheduling data to receiving terminal on described re-transmission zone.
Further, marking off in transfer resource that the base station is real-time retransmits the zone and notifies terminal to be meant:
Zone of Dynamic Definition in transfer resource, base station retransmits map information to terminal as retransmitting the zone, sending, and specifies the position and the size of this shared transfer resource in zone in retransmitting map information.
Further, marking off in transfer resource that the base station is real-time retransmits the zone and notifies terminal to be meant:
The base station is selected one as the re-transmission zone in the predefined semi-static zone from broadcast message, send and retransmit map information to terminal, indicates this to retransmit area relative presumptive area ID number in retransmitting map information;
When the re-transmission zone varied in size with described presumptive area, the variable quantity of re-transmission zone with respect to described presumptive area indicated in the base station in retransmitting map information.
Further, satisfy in the re-transmission zone that the base station marked off:
When the constant-scheduling zone is positioned at n radio frames, be positioned at the n+i * RTT radio frames with re-transmission zone corresponding, that be used for the re-transmission of i secondary data, this constant-scheduling zone; Described RTT is for mixing the retransmission time interval that retransmits automatically.
Further, the base station also is used for same radio frames is associated in corresponding to the re-transmission region class in different constant-schedulings zone and forms a big re-transmission zone together.
Further, need retransmit described constant-scheduling data conditions comprises: the constant-scheduling data that be not received the entirely true reception of end in the first constant-scheduling data that transmit on the constant-scheduling zone, retransmit on the re-transmission zone are not received the entirely true reception of end;
Transmitting terminal is meant retransmitting described constant-scheduling data to receiving terminal on the described re-transmission zone: when once transmitting described constant-scheduling data before transmitting terminal sends, be not received in the corresponding region and rectify the constant-scheduling data that really receive.
Further, transmitting terminal retransmits described constant-scheduling data to receiving terminal and is meant on described re-transmission zone:
Transmitting terminal according to preceding when once transmitting described constant-scheduling data in the corresponding region ACK/NACK information of son burst retransmit the son burst, be the son burst of NACK for feedback information, in retransmitting the zone, resend to receiving terminal; For feedback information is the son burst of ACK feedback, does not resend in retransmitting the zone.
Further, the base station also is used for the burst of the son behind the resource cavity is moved to retransmitting regional section start successively, and interior each the height burst in re-transmission zone is connected; The size that retransmits the zone equals the summation of the sub size that happens suddenly of data of each re-transmission; The son burst that to pass regional internal feedback information be ACK of attaching most importance to of described resource cavity.
Further, when transmitting terminal is the base station, when receiving terminal is terminal:
The base station also is used for feedback index bitmap is sent to terminal;
Terminal also is used for son according to described feedback index bitmap nack message correspondence in retransmitting the zone and receives on happening suddenly.
Above-mentioned at least one technical scheme of the present invention, retransmit the zone by defining, it is perfect to adopt the asynchronous HARQ mechanism of grouping that the constant-scheduling scheme has been carried out, and the grouping here is meant retransmission packet is concentrated on transmission in the re-transmission zone, so just, saved expense only with specifying the parameter that retransmits the zone; Asynchronous be meant in each radio frames retransmit the zone can be different, make scheme more flexible like this.The present invention further adopts the re-transmission resource of the ACK/NACK information of feedback as feedback index Bitmap information mapping HARQ, has reduced to retransmit the expense of resource, and has solved the problem that retransmits the resource cavity in zone, avoids the wasting of resources, improves resource utilization.Other features and advantages of the present invention will be set forth in the following description; Purpose of the present invention and other advantages can realize and obtain by specifically noted mode in the specification of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of the resource division of constant-scheduling;
Fig. 2 is that the present invention uses constant-scheduling zone and re-transmission area schematic in the example one;
Fig. 3 is a re-transmission resource mapping schematic diagram of using example one according to the present invention;
Fig. 4 is a up constant-scheduling asynchronous packet HARQ schematic diagram of using example two according to the present invention;
Fig. 5 is up constant-scheduling asynchronous packet HARQ method schematic diagram.
Embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is described in detail; Should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.
Based on the above-mentioned permanent resource scheduling consideration of big this defective of HARQ expense down to existing in the correlation technique, the present invention proposes the asynchronous HARQ mechanism of grouping under a kind of constant allocation mode, be applied to support the communication environment of HARQ under the permanent resource schedulable condition---such as the communication of HARQ in the TDD-OFDM system, the expense that can reduce to retransmit, and reduce complexity, adapt to constant business characteristic more.
A kind of data communications method based on constant allocation mode of the present invention comprises:
Transmitting terminal sends the constant-scheduling data to receiving terminal on the constant-scheduling zone;
When needing to retransmit described constant-scheduling data, what system was real-time marks off in transfer resource corresponding to the described constant-scheduling re-transmission zone, that be used for this re-transmission zone at every turn;
Transmitting terminal retransmits described constant-scheduling data to receiving terminal on described re-transmission zone.
What is called is meant that in real time system divides according to current resource situation and channel situation etc., that is to say that position, the size in the re-transmission zone that at every turn marks off is indefinite.
Described constant-scheduling zone is the transfer resource of the constant-scheduling of system divides in the prior art, comprises up constant-scheduling zone and/or descending constant-scheduling zone.
Can know by inference, each corresponding with same constant-scheduling zone retransmits the zone and also corresponds to each other; The number in the re-transmission zone of a constant-scheduling zone correspondence is not more than maximum retransmission; Herein for convenience of description, the re-transmission zone that is respectively applied for each secondary data re-transmission is called successively: the 1st data retransmission district, the 2nd data retransmission district, the 3rd data retransmission district ...
Optionally, system can define described re-transmission zone in retransmitting map information; Also can use predefined semi-static zone in the broadcast message, indication is as described ID number of retransmitting regional presumptive area in retransmitting map information.
Optionally, when use retransmitting the map information definition when retransmitting the zone, system is real-time marks off in transfer resource and retransmits the zone and can refer to:
The position and the size of this shared transfer resource in zone specified as retransmitting the zone in new zone of Dynamic Definition in transfer resource, base station in retransmitting map information.
Optionally, when the semi-static zone that use pre-defines, and to indicate for ID number when retransmitting the zone, system is real-time marks off in transfer resource and retransmits the zone and can be meant:
The base station selects a conduct to retransmit the zone from broadcast message in the predefined semi-static zone, this re-transmission area relative presumptive area of indication is ID number in retransmitting map information;
When the re-transmission zone varied in size with described presumptive area, the variable quantity of re-transmission zone with respect to described presumptive area indicated in the base station in retransmitting map information; This variable quantity can be that unit indicates in retransmitting map information with the number of time slot.
Send the ACK confirmation to transmitting terminal when usually, receiving terminal correctly receives; When correctly receiving, receiving terminal do not send nack message to transmitting terminal; Transmitting terminal knows with ACK/NACK information whether receiving terminal correctly receives.
Optionally, the time interval between the ACK/NACK feedback areas corresponding with it of up constant-scheduling zone and descending constant-scheduling zone will be satisfied at least the requirement greater than processing delay etc., with the cycle that guarantees all data burst re-transmissions in this constant-scheduling zone be a radio frames;
Each retransmit the zone with preceding when once transmitting described constant-scheduling data the subframe at corresponding ACK/NACK feedback areas place the interval of N subframe will be arranged at least, with time delay demands such as assurance processing; The size of N is according to system's actual conditions decision.
Optionally, each corresponding with same constant-scheduling zone retransmits the zone, and such as the 1st data retransmission district, the 2nd data retransmission district, the 3rd data retransmission district etc. lay respectively in the different radio frames; Constant-scheduling zone with retransmit the zone with its corresponding each and also be arranged in different radio frames.
Optionally, when the constant-scheduling zone is positioned at n radio frames, be positioned at the n+i * RTT radio frames with re-transmission zone corresponding, that be used for the re-transmission of i secondary data, this constant-scheduling zone; Described RTT (Round Trip Time) is for mixing the retransmission time interval that retransmits automatically.During practical application, if do not have resource in the n+i * RTT radio frames, the re-transmission zone that then is used for the i time re-transmission also can be placed on follow-up radio frames.
Optionally, in the same radio frames, can cascade form a big re-transmission zone corresponding to the re-transmission zone in different constant-schedulings zone together.
Need retransmit described constant-scheduling data conditions comprises: the constant-scheduling data that be not received the entirely true reception of end in the first constant-scheduling data that transmit on the constant-scheduling zone, retransmit on the re-transmission zone are not received the entirely true reception of end;
Optionally, transmitting terminal retransmits described constant-scheduling data to receiving terminal and can be meant on described re-transmission zone:
In each retransmits the zone, be not received the data of rectifying the constant-scheduling that really receives when once transmitting described constant-scheduling data before the transmission in the corresponding region, specifically that is to say: be not received the data of rectifying the constant-scheduling that really receives in the constant-scheduling zone when once transmitting described constant-scheduling data before in the 1st data retransmission district, sending; Be not received the data of the 2nd the correct constant-scheduling that receives of end when once transmitting described constant-scheduling data before in the 2nd data retransmission district, sending in the 1st data retransmission district; Be not received the son burst of the 3rd the correct constant-scheduling that receives of end when once transmitting described constant-scheduling data before in the 3rd data retransmission district, sending in the 2nd data retransmission district; And by that analogy.
In the constant-scheduling zone, send the new data burst of constant-scheduling, the number of data burst is by the number of users of scheduling and the resource size decision of each user distribution.
Optionally, each number that retransmits data burst in the zone is not received the number of rectifying the data burst that really receives and the size decision of each burst when once transmitting described constant-scheduling data by preceding in the corresponding region, specifically that is to say: in the 1st data retransmission district the number of data burst by preceding when once transmitting described constant-scheduling data in the constant-scheduling zone be not received the number of rectifying the data burst that really receives and the size decision of each burst; The number of data burst is not received the number of rectifying the data burst that really receives, retransmit for the 1st time and the size decision of each burst when once transmitting described constant-scheduling data by preceding in the 2nd data retransmission district; The number of data burst is not received the number of rectifying the data burst that really receives, retransmit for the 2nd time and the size decision of each burst when once transmitting described constant-scheduling data by preceding in the 3rd data retransmission district; And the like.
Optionally, the mapping of son burst generates a constant regional mapping table in the constant zone, changes when the burst that constant regional mapping table only distributes in constant zone changes.Constant regional mapping table comprise in have: the connection ID under the son burst, the shared resource size of son burst.
Retransmit in the zone at the 1st time, the burst of each height is according to the preceding success or not of sub-burst transfer in the constant-scheduling zone of correspondence when once transmitting described constant-scheduling data, the ACK/NACK information that son happened suddenly in the constant-scheduling zone of correspondence when promptly feedback preceding once transmitted described constant-scheduling data, shine upon the son burst that retransmits for the 1st time in the zone with the form of feedback index bitmap (position mapping) and divide, the size of each height burst is by the acquisition of tabling look-up in aforesaid constant regional mapping table.
Further, for descending HARQ, the sequence that the son burst ACK/NACK information in the descending sub frame when above-mentioned feedback index bitmap is meant and once transmits described constant-scheduling data by terminal feedback preceding in the corresponding region is formed;
Further, for ascending HARQ, the sequence that the son burst ACK/NACK information in the sub-frame of uplink when above-mentioned feedback index bitmap is meant and once transmits described constant-scheduling data by base station feedback preceding in the corresponding region is formed;
Feedback index bitmap corresponds to 0, and (perhaps 1) bit table is shown the NACK feedback, and corresponding son burst will resend in retransmitting the zone; Feedback index bitmap corresponds to 1, and (perhaps 0) bit table is shown the ACK feedback, and corresponding son burst will repeating transmission in retransmitting the zone.Be fed back to the resource cavity that the son burst of ACK causes in retransmitting the zone, by the mode filling cavity of follow-up Resource Block displacement.
Optionally, above-mentioned Resource Block displacement is meant: the son burst that originally will transmit, because professional cancellation (constant zone) or receive the ACK feedback and need in the corresponding retransmission zone, not retransmit, formation resource cavity, son thereafter happens suddenly according to the size in resource cavity, successively to constant-scheduling zone or retransmit regional section start and move, so that each height burst is connected.
The number of son burst is by the number decision of the son burst that is fed back to NACK in the corresponding region of last time feeding back in each re-transmission zone.The son burst that retransmits is unified into the Resource Block of an integral body through the time slot displacement.
The size that retransmits the zone equals the summation of the sub size that happens suddenly of data of each re-transmission; The acquisition of in aforesaid constant regional mapping table, tabling look-up of the time slot of each burst.
Similar with the 1st data retransmission district, in the 2nd data retransmission district, the burst of each height is according to the preceding success or not of sub-burst transfer in the 1st the data retransmission district of correspondence when once transmitting described constant-scheduling data, be the ACK/NACK information of son burst in the 1st the data retransmission district of up feedback preceding correspondence when once transmitting described constant-scheduling data, shine upon the 2nd the son burst in the data retransmission district with the form of bitmap and divide.Further, be fed back to the son burst of NACK, will in the 2nd data retransmission district, resend; Be fed back to the son burst of ACK, will in the 2nd data retransmission district, do not retransmit.Be fed back to the resource cavity that the son burst of ACK causes in retransmitting the zone, by the mode filling cavity of follow-up Resource Block displacement.
By that analogy, be used for son burst in the re-transmission zone that the i secondary data retransmits according to preceding when once transmitting described constant-scheduling data, be used in the re-transmission zone that the i-1 secondary data retransmits the sub ACK/NACK information that happens suddenly and shine upon.
Optionally, when transmitting terminal is the base station, when receiving terminal was terminal, this method specifically can comprise:
A, base station send the constant-scheduling data to terminal on descending constant-scheduling zone;
B, terminal are fed back the ACK/NACK information that happens suddenly for each data with the form of feedback index bit mapping bitmap;
C, when having nack message, what the base station was real-time marks off in transfer resource corresponding to the described constant-scheduling re-transmission zone, that be used for this re-transmission zone, and by retransmitting map information notice terminal, carries out step D;
When not having nack message, the constant-scheduling transfer of data in this constant-scheduling cycle is finished;
D, be the son burst of NACK for feedback information, the base station resends to terminal in retransmitting the zone; For feedback information is the son burst of ACK feedback, and the base station does not resend in retransmitting the zone;
The base station sends to terminal with described feedback index bitmap; Receive in the son burst of terminal according to described feedback index bitmap nack message correspondence in retransmitting the zone; Return step B.
Optionally, when transmitting terminal is a terminal, when receiving terminal was the base station, this method specifically can comprise:
A, terminal send the constant-scheduling data to the base station on descending constant-scheduling zone;
The ACK/NACK information that happens suddenly for each data is fed back with the form of feedback index bit mapping bitmap in b, base station;
When having nack message, what the base station was real-time marks off in transfer resource corresponding to the described constant-scheduling re-transmission zone, that be used for this re-transmission zone, and by retransmitting map information notice terminal, carries out step c;
When not having nack message, the constant-scheduling transfer of data in this constant-scheduling cycle is finished;
C, be the son burst of NACK for feedback information, terminal resends to the base station in retransmitting the zone; For feedback information is the son burst of ACK feedback, and terminal does not resend in retransmitting the zone;
Receive in the son burst of d, base station terminal nack message correspondence in retransmitting the zone; Return step b.
The present invention also provides a kind of communication system based on constant-scheduling, comprising: base station and terminal; On up direction, terminal is as transmitting terminal, and the base station is as receiving terminal; On down direction, the base station is as transmitting terminal, and terminal is as receiving terminal; Transmitting terminal sends the constant-scheduling data to receiving terminal on the constant-scheduling zone; Wherein:
The base station is used for when each needs retransmit described constant-scheduling data, real-time in transfer resource, mark off regional and notify terminal corresponding to the re-transmission zone, that be used for this re-transmission of described constant-scheduling;
Transmitting terminal retransmits described constant-scheduling data to receiving terminal on described re-transmission zone.
Optionally, marking off in transfer resource that the base station is real-time retransmits the zone and notifies terminal to be meant:
New zone of Dynamic Definition in transfer resource, base station retransmits map information to terminal as retransmitting the zone, sending, and specifies the position and the size of this shared transfer resource in zone in retransmitting map information.
Optionally, marking off in transfer resource that the base station is real-time retransmits the zone and notifies terminal to be meant:
The base station is selected one as the re-transmission zone in the predefined semi-static zone from broadcast message, send and retransmit map information to terminal, indicates this to retransmit area relative presumptive area ID number in retransmitting map information;
When the re-transmission zone varied in size with described presumptive area, the variable quantity of re-transmission zone with respect to described presumptive area indicated in the base station in retransmitting map information.
Optionally, satisfy in the re-transmission zone that the base station marked off: when the constant-scheduling zone is positioned at n radio frames, be positioned at the n+i * RTT radio frames with re-transmission zone corresponding, that be used for the re-transmission of i secondary data, this constant-scheduling zone; Described RTT is for mixing the retransmission time interval that retransmits automatically.
Optionally, the base station also is used for same radio frames is associated in corresponding to the re-transmission region class in different constant-schedulings zone and forms a big re-transmission zone together.
Optionally, need retransmit described constant-scheduling data conditions comprises: the constant-scheduling data that be not received the entirely true reception of end in the first constant-scheduling data that transmit on the constant-scheduling zone, retransmit on the re-transmission zone are not received the entirely true reception of end;
Transmitting terminal is meant retransmitting described constant-scheduling data to receiving terminal on the described re-transmission zone: when once transmitting described constant-scheduling data before transmitting terminal sends, be not received in the corresponding region and rectify the constant-scheduling data that really receive.
Optionally, transmitting terminal retransmits described constant-scheduling data to receiving terminal and is meant on described re-transmission zone:
Transmitting terminal according to preceding when once transmitting described constant-scheduling data in the corresponding region ACK/NACK information of son burst retransmit the son burst, be the son burst of NACK for feedback information, in retransmitting the zone, resend to receiving terminal; For feedback information is the son burst of ACK feedback, does not resend in retransmitting the zone.
Optionally, the base station also is used for the burst of the son behind the resource cavity is moved to retransmitting regional section start successively, and interior each the height burst in re-transmission zone is connected; The size that retransmits the zone equals the summation of the sub size that happens suddenly of data of each re-transmission; The son burst that to pass regional internal feedback information be ACK of attaching most importance to of described resource cavity.
Optionally, when transmitting terminal is the base station, when receiving terminal is terminal:
The base station also is used for feedback index bitmap is sent to terminal;
Terminal also is used for son according to described feedback index bitmap nack message correspondence in retransmitting the zone and receives on happening suddenly.
In the system other realizes that details can be with described in the method.
Using example with two of the present invention below further is illustrated.
Use example one, provide in a kind of TDD-OFDM system, based on the communication means of the asynchronous HARQ of downlink grouped of constant allocation mode
As shown in Figure 2, constant-scheduling is an one-period with a superframe, and a superframe is 4 radio frames; Should retransmit 3 times with hypothesis in the example, the zone that r0 represents is the constant-scheduling zone; R1 is the re-transmission zone that the 1st secondary data retransmits that is used for corresponding to the r0 zone; R2 is the re-transmission zone that the 2nd secondary data retransmits that is used for corresponding to the r0 zone; R3 is the re-transmission zone that the 3rd secondary data retransmits that is used for corresponding to the r0 zone.
Should be with being that the length that equals a radio frames with RRT length is that example describes in the example, so r0, r1, r2, r3 be in time corresponding in the adjacent radio frames, do not get rid of other situation certainly during practical application.
The position of r0, r1, r2, r3 and size dynamically change according to scheduling; Total size decision of the burst that each size that retransmits regional shared time is transmitted by this zone.Each position and size that retransmits the zone indicates in retransmitting map information; Perhaps each re-transmission zone is indicated by the ID in the semi-static zone that pre-defines, and indicates this regional variable quantity in retransmitting map information.
If use the semi-static zone pre-define, and indicate with ID number, then need retransmit the different of territory, map information middle finger area pellucida and presumptive area size this moment, on-the-fly modifies the size in this zone according to the desired zone size.
The attribute of the interior son burst in constant-scheduling zone constitutes constant regional mapping table, and the terminal in all constant-scheduling zones reads this table under situations such as constant-scheduling zone establishment, change, and the update cycle of this table is a dispatching cycle at least.
Table 1, constant regional mapping table
| The son burst | Connect CID | Length (is unit with RU) |
| ??1 | ??RCID | ??x |
| ??2 | ??RCID | ??x |
| ??3 | ??RCID | ??x |
| ??4 | ??RCID | ??x |
| ??5 | ??RCID | ??x |
The mode that son burst employing is shifted in proper order in retransmitting regional r1, r2, r3 remedies the resource cavity.When being fed back to ACK, promptly change son burst and successfully send, do not need to resend, and in retransmitting the zone to should sub-burst position promptly having formed the resource cavity, as shown in Figure 3.5 son bursts are arranged in the constant-scheduling zone, after sending to terminal, terminal feeding back ACK/nack message, son burst 1,2,5 is fed back to NACK, son burst 3,4 is fed back to ACK, promptly retransmit in the zone first, son burst 1,2,5 retransmits, and has formed the cavity of resource on the position of son burst 3,4 correspondences.
According to technology provided by the invention, the mapping relations of the son burst in retransmitting the zone as shown in Figure 4.The feedback information that each son burst of constant zone obtains constitutes an index sequence, sequence is 11001 (to suppose that NACK is 1, ACK is 0), this feedback index of all terminals Bitmap is notified in the base station in the re-transmission map information of constant-scheduling, and this field is called the 1st time and retransmits son burst mapping bitmap; Simultaneously, the base station notifies each the height burst of all terminals shared timeslot number.
It is 1 son burst that the base station retransmits among the feedback index Bitmap, and eliminating among the feedback index Bitmap by the time slot displacement is the resource cavity that 0 son burst is produced; The son burst that retransmits is unified into the Resource Block of an integral body through the time slot displacement.
Terminal reads that corresponding its receives the information of son burst feedback index Bitmap in the re-transmission map information of constant-scheduling, if the feedback bit of the son corresponding with it burst is 1, shows then that retransmitting for the 1st time on the relevant position in zone the son burst of re-transmission is arranged;
In like manner, the son burst is index in the arrangement that each time retransmits in the zone with the preceding ACK/NACK information that once retransmits zone son burst that receiving terminal feeds back, and the base station adopts the mode of bitmap to indicate index and the shared timeslot number of each son burst to all terminals in the re-transmission mapping.
The re-transmission map information is as shown in table 2.
Table 2, re-transmission map information table
| Grammer (Syntax) | Size | Describe |
| ?Retransmission?MAP?for ?Persistent?Allocation ??(?){ | ||
| ?...... | ||
| ?If(Retransmission?Number＝＝1){ | Retransmit for the first time | |
| ?Region?ID?used | ??1bit | Retransmit area I D |
| ?If(Region?ID?used＝＝1) ?{ | Use semi-static zone |
| ??Region?ID | ??xbit | Area I D number |
| ??Changed?Slots ??} | ??xbit | The change amount in zone changes the bottom from the zone; + for increasing;-for reducing; |
| ??If(Region?id?used＝＝0) ??{ | Do not use semi-static zone | |
| ??Symbol?offset/Subframes | ??xbit | Symbol biasing/the sub-frame offset in zone |
| ??Sub-channel?offset | ??xbit | |
| ??Number?of?Symbol/Number?of ??subframes | ??xbit | |
| ??Number?of?Sub-channels | ??xbit | |
| ??} | ||
| ??l?stPersistent?Retransmission ??bitmap | ??xbit | |
| ??} | ||
| ??If(Retransmission?Number＝＝2){ | Retransmit for the second time | |
| ??Region?ID?used | ??1bit | Retransmit area I D |
| ??If(Region?ID?used＝＝1) ??{ | Use semi-static zone | |
| ??Region?ID | ??xbit | Area I D number |
| ??Changed?Slots ??} | ??xbit | The change amount in zone changes the bottom from the zone; + for increasing;-for reducing; |
| ??If(Region?ID?used＝＝0) ??{ | Do not use semi-static zone | |
| ??Symbol?offset/Subframes | ??xbit | Symbol biasing/the sub-frame offset in zone |
| ??Sub-channel?offset | ??xbit | |
| ??Number?of?Symbol/Number?of ??subframes | ??xbit | |
| ??Number?of?Sub-channels | ??xbit | |
| ??} | ||
| ??1stPersistent?Retransmission ??bitmap | ??xbit | |
| ??} |
| ... | ||
Use example two
Fig. 5 is up constant-scheduling asynchronous packet HARQ method schematic diagram.Wherein constant-scheduling zone and re-transmission are across 2 subframes.
Principle is identical.
To sum up, by means of the present invention, adopt asynchronous packet HARQ mode by the burst of the son in the constant-scheduling zone, utilize feedback index bitmap information mapping to retransmit resource, can reduce the big overhead issues that adopts asynchronous HARQ, can define flexibly simultaneously and retransmit the zone, make rational use of resources, improve resource utilization.
Obviously, those skilled in the art should be understood that, above-mentioned each modular unit of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (19)
1, a kind of data communications method based on constant-scheduling comprises:
Transmitting terminal sends the constant-scheduling data to receiving terminal on the constant-scheduling zone;
When needing to retransmit described constant-scheduling data, what system was real-time marks off in transfer resource corresponding to the described constant-scheduling re-transmission zone, that be used for this re-transmission zone at every turn;
Transmitting terminal retransmits described constant-scheduling data to receiving terminal on described re-transmission zone.
2, the method for claim 1 is characterized in that, the re-transmission zone that marks off in transfer resource that system is real-time is meant:
The position and the size of this shared transfer resource in zone specified as retransmitting the zone in zone of Dynamic Definition in transfer resource, base station in retransmitting map information.
3, the method for claim 1 is characterized in that, the re-transmission zone that marks off in transfer resource that system is real-time is meant:
The base station selects a conduct to retransmit the zone from broadcast message in the predefined semi-static zone, this re-transmission area relative presumptive area of indication is ID number in retransmitting map information;
When the re-transmission zone varied in size with described presumptive area, the variable quantity of re-transmission zone with respect to described presumptive area indicated in the base station in retransmitting map information.
4, the method for claim 1 is characterized in that:
When the constant-scheduling zone is positioned at n radio frames, be positioned at the n+i * RTT radio frames with re-transmission zone corresponding, that be used for the re-transmission of i secondary data, this constant-scheduling zone; Described RTT is for mixing the retransmission time interval that retransmits automatically.
5, method as claimed in claim 4 is characterized in that:
In the same radio frames, be associated in corresponding to the re-transmission region class in different constant-schedulings zone and form a big re-transmission zone together.
6, as each described method in the claim 1 to 5, it is characterized in that:
Need retransmit described constant-scheduling data conditions comprises: the constant-scheduling data that be not received the entirely true reception of end in the first constant-scheduling data that transmit on the constant-scheduling zone, retransmit on the re-transmission zone are not received the entirely true reception of end;
Transmitting terminal is meant retransmitting described constant-scheduling data to receiving terminal on the described re-transmission zone: when once transmitting described constant-scheduling data before transmitting terminal sends, be not received in the corresponding region and rectify the constant-scheduling data that really receive.
7, method as claimed in claim 6 is characterized in that, transmitting terminal retransmits described constant-scheduling data to receiving terminal and is meant on described re-transmission zone:
According to preceding when once transmitting described constant-scheduling data in the corresponding region ACK/NACK information of son burst retransmit the son burst, be the son burst of NACK for feedback information, transmitting terminal resends to receiving terminal in retransmitting the zone; For feedback information is the son burst of ACK feedback, and transmitting terminal does not resend in retransmitting the zone.
8, method as claimed in claim 7 is characterized in that, also comprises:
Be the resource cavity that the son burst of ACK causes in retransmitting the zone for feedback information, the son burst of base station after with the resource cavity moved to retransmitting regional section start successively, makes to retransmit that each height burst is connected in the zone; The size that retransmits the zone equals the summation of the sub size that happens suddenly of data of each re-transmission.
9, the method for claim 1 is characterized in that, transmitting terminal is the base station, and when receiving terminal was terminal, this method specifically comprised:
A, base station send the constant-scheduling data to terminal on descending constant-scheduling zone;
B, terminal are fed back the ACK/NACK information that happens suddenly for each data with the form of feedback index bit mapping bitmap;
C, when having nack message, the base station is real-time marking off corresponding to the described constant-scheduling re-transmission zone, that be used for this re-transmission zone in transfer resource, and by retransmitting map information notice terminal, carry out step D;
When not having nack message, the constant-scheduling transfer of data in this constant-scheduling cycle is finished;
D, be the son burst of NACK for feedback information, the base station resends to terminal in retransmitting the zone; For feedback information is the son burst of ACK feedback, and the base station does not resend in retransmitting the zone;
The base station sends to terminal with described feedback index bitmap; Receive in the son burst of terminal according to described feedback index bitmap nack message correspondence in retransmitting the zone; Return step B.
10, the method for claim 1 is characterized in that, transmitting terminal is a terminal, and when receiving terminal was the base station, this method specifically comprised:
A, terminal send the constant-scheduling data to the base station on descending constant-scheduling zone;
The ACK/NACK information that happens suddenly for each data is fed back with the form of feedback index bit mapping bitmap in b, base station;
When having nack message, what the base station was real-time marks off in transfer resource corresponding to the described constant-scheduling re-transmission zone, that be used for this re-transmission zone, and by retransmitting map information notice terminal, carries out step c;
When not having nack message, the constant-scheduling transfer of data in this constant-scheduling cycle is finished;
C, be the son burst of NACK for feedback information, terminal resends to the base station in retransmitting the zone; For feedback information is the son burst of ACK feedback, and terminal does not resend in retransmitting the zone;
Receive in the son burst of d, base station terminal nack message correspondence in retransmitting the zone; Return step b.
11, a kind of communication system based on constant-scheduling comprises: base station and terminal; On up direction, terminal is as transmitting terminal, and the base station is as receiving terminal; On down direction, the base station is as transmitting terminal, and terminal is as receiving terminal; Transmitting terminal sends the constant-scheduling data to receiving terminal on the constant-scheduling zone;
It is characterized in that:
The base station is used for when each needs retransmit described constant-scheduling data, real-time in transfer resource, mark off regional and notify terminal corresponding to the re-transmission zone, that be used for this re-transmission of described constant-scheduling;
Transmitting terminal retransmits described constant-scheduling data to receiving terminal on described re-transmission zone.
12, system as claimed in claim 11 is characterized in that, marking off in transfer resource that the base station is real-time retransmits the zone and notify terminal to be meant:
Zone of Dynamic Definition in transfer resource, base station retransmits map information to terminal as retransmitting the zone, sending, and specifies the position and the size of this shared transfer resource in zone in retransmitting map information.
13, system as claimed in claim 11 is characterized in that, marking off in transfer resource that the base station is real-time retransmits the zone and notify terminal to be meant:
The base station is selected one as the re-transmission zone in the predefined semi-static zone from broadcast message, send and retransmit map information to terminal, indicates this to retransmit area relative presumptive area ID number in retransmitting map information;
When the re-transmission zone varied in size with described presumptive area, the variable quantity of re-transmission zone with respect to described presumptive area indicated in the base station in retransmitting map information.
14, system as claimed in claim 11 is characterized in that, satisfy in the re-transmission zone that the base station marked off:
When the constant-scheduling zone is positioned at n radio frames, be positioned at the n+i * RTT radio frames with re-transmission zone corresponding, that be used for the re-transmission of i secondary data, this constant-scheduling zone; Described RTT is for mixing the retransmission time interval that retransmits automatically.
15, system as claimed in claim 14 is characterized in that:
The base station also is used for same radio frames is associated in corresponding to the re-transmission region class in different constant-schedulings zone forms a big re-transmission zone together.
16, as each described system in the claim 11 to 15, it is characterized in that:
Need retransmit described constant-scheduling data conditions comprises: the constant-scheduling data that be not received the entirely true reception of end in the first constant-scheduling data that transmit on the constant-scheduling zone, retransmit on the re-transmission zone are not received the entirely true reception of end;
Transmitting terminal is meant retransmitting described constant-scheduling data to receiving terminal on the described re-transmission zone: when once transmitting described constant-scheduling data before transmitting terminal sends, be not received in the corresponding region and rectify the constant-scheduling data that really receive.
17, system as claimed in claim 16 is characterized in that, transmitting terminal retransmits described constant-scheduling data to receiving terminal and is meant on described re-transmission zone:
Transmitting terminal according to preceding when once transmitting described constant-scheduling data in the corresponding region ACK/NACK information of son burst retransmit the son burst, be the son burst of NACK for feedback information, in retransmitting the zone, resend to receiving terminal; For feedback information is the son burst of ACK feedback, does not resend in retransmitting the zone.
18, system as claimed in claim 17 is characterized in that:
The base station also is used for the burst of the son behind the resource cavity is moved to retransmitting regional section start successively, and interior each the height burst in re-transmission zone is connected; The size that retransmits the zone equals the summation of the sub size that happens suddenly of data of each re-transmission; The son burst that to pass regional internal feedback information be ACK of attaching most importance to of described resource cavity.
19, system as claimed in claim 11 is characterized in that, when transmitting terminal is the base station, when receiving terminal is terminal:
The base station also is used for feedback index bitmap is sent to terminal;
Terminal also is used for son according to described feedback index bitmap nack message correspondence in retransmitting the zone and receives on happening suddenly.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108633061A (en) * | 2017-03-25 | 2018-10-09 | 中兴通讯股份有限公司 | Configured transmission determines method and device |
| CN109963346A (en) * | 2017-12-25 | 2019-07-02 | 珠海市魅族科技有限公司 | The dispatching method and device of uplink retransmission resource, transmission block repeating method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108633061A (en) * | 2017-03-25 | 2018-10-09 | 中兴通讯股份有限公司 | Configured transmission determines method and device |
| CN108633061B (en) * | 2017-03-25 | 2023-06-02 | 中兴通讯股份有限公司 | Transmission parameter determining method and device |
| CN108633061B9 (en) * | 2017-03-25 | 2023-09-29 | 中兴通讯股份有限公司 | Transmission parameter determining method and device |
| CN109963346A (en) * | 2017-12-25 | 2019-07-02 | 珠海市魅族科技有限公司 | The dispatching method and device of uplink retransmission resource, transmission block repeating method and device |
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