CN101686116A - Method, system and device for indicating progress of reserved hybrid automatic repeat request - Google Patents
Method, system and device for indicating progress of reserved hybrid automatic repeat request Download PDFInfo
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Abstract
The invention discloses a method, a system and a device for indicating the progress of an reserved hybrid automatic repeat request (HARQ), which comprises that indication information is determined according to a mapping relationship preset in a network side, and is transmitted to a user equipment (UE) side through a radio resource control (RRC) signaling by the network side; the mapping relationship comprises the relationship between a semi-persistent schedule (SPS) period and the process number of the reserved HARQ; after receiving the RRC signaling, the UE side determines the process numberof the reserved HARQ indicated in the indication information according to the SPS period and the mapping relationship preset in the UE side. The invention not only can notify the UE through the RRC signaling to reserve HARQ process for SPS, but also can cause the UE to directly understand the meaning of the RRC signaling according to the SPS period and the mapping relationship, thus reducing the loading of the RRC signaling.
Description
Technical field
The present invention relates to the communications field, particularly a kind of reserved hybrid automatic repeat request process indicating means, system and equipment.
Background technology
Present LTE (Long Term Evolution, Long Term Evolution) about SPS (semi-persistentschedule, semi-continuous scheduling) descending HARQ (Hybrid Automatic Repeat reQuest, mix automatic repeat requests) conclusion reached of process number is: SPS uses the HARQ process number of reserving, dynamic dispatching can be used the HARQ process number of keeping for SPS, use RRC (Radio Resource Control, Radio Resource control) signaling UE (User Equipment, subscriber equipment) the HARQ process number of Yu Liuing, can reserve one or more HARQ process numbers, and HARQ process number and SFN (SystemFrame Number, System Frame Number) binding.
But the deficiencies in the prior art are: determine at present just the HARQ process number that uses RRC signaling UE to reserve, but when adopting this scheme, need carry more information in the RRC signaling of the HARQ process number that notice UE reserves, make that the RRC signaling traffic load is bigger.
Summary of the invention
The invention provides a kind of reserved hybrid automatic repeat request process indicating means, system and equipment, notify UE to reserve the problem of HARQ process in order to solve by the RRC signaling.
The embodiment of the invention provides a kind of reserved hybrid automatic repeat request HARQ process indicating means, comprises the steps:
Determine indication information according to the mapping relations that are preset in network side, network side is sent to user equipment side with this indication information by radio resource control signaling, and described mapping relations comprise the relation between semi-continuous scheduling cycle and the reserved hybrid automatic repeat request number of processes;
User equipment side is determined reserved hybrid automatic repeat request number of processes indicated in the described indication information according to semi-continuous scheduling cycle and the described mapping relations that are preset in user equipment side after receiving radio resource control signaling.
Preferably, described mapping relations comprise maximum transmitted time delay and/or RTT (Round Trip Time, two-way time), and the relation between semi-continuous scheduling cycle and the reserved hybrid automatic repeat request number of processes.
Preferably, further comprise:
The HARQ process of keeping for SPS begins upwards to reserve continuously from the process number of minimum, or begins to reserve downwards continuously from the process number of maximum.
The present invention also provides a kind of reserved hybrid automatic repeat request process indication mechanism, comprises network equipment, UE, wherein:
Network equipment, the indication information that is used for determining according to mapping relations is sent to subscriber equipment by radio resource control signaling, and described mapping relations comprise the relation between semi-continuous scheduling cycle and the reserved hybrid automatic repeat request number of processes;
Subscriber equipment, be used for after receiving radio resource control signaling, determine reserved hybrid automatic repeat request number of processes indicated in the described indication information according to the employed semi-continuous scheduling of user equipment side cycle and mapping relations, described mapping relations comprise the relation between semi-continuous scheduling cycle and the reserved hybrid automatic repeat request number of processes.
Preferably, described network equipment is further used for determining mapping relations, and described mapping relations comprise maximum transmitted time delay and/or minimum two-way time, and the relation between semi-continuous scheduling cycle and the reserved hybrid automatic repeat request number of processes;
Described subscriber equipment is further used for determining mapping relations, and described mapping relations comprise maximum transmitted time delay and/or minimum two-way time, and the relation between semi-continuous scheduling cycle and the reserved hybrid automatic repeat request number of processes.
Preferably, the HARQ process that network equipment is further used for keeping for SPS begins upwards to reserve continuously from the process number of minimum, or begins to reserve downwards continuously from the process number of maximum.
The embodiment of the invention provides a kind of network equipment of indicating the reserved hybrid automatic repeat request process, comprising:
Mapping block is used for determining mapping relations that described mapping relations comprise the relation between semi-continuous scheduling cycle and the reserved hybrid automatic repeat request number of processes;
Sending module, the indication information that is used for determining according to mapping relations is sent to UE by the RRC signaling.
Preferably, described mapping block is further used for according to maximum transmitted time delay and/or minimum RTT two-way time, and the SPS cycle is determined mapping relations with reservation HARQ number of processes relation.
Preferably, further comprise:
Process is reserved module, and the HARQ process that is used for keeping for SPS begins upwards to reserve continuously from the process number of minimum, or begins to reserve downwards continuously from the process number of maximum.
The embodiment of the invention provides a kind of subscriber equipment that is used for the reserved hybrid automatic repeat request process of definite indication, comprising:
Mapping block is used for determining mapping relations according to SPS cycle and reservation HARQ number of processes relation;
Determination module is used for after receiving the RRC signaling, determines reservation HARQ number of processes indicated in the described indication information according to SPS cycle and mapping relations.
Preferably, described mapping block is further used for according to maximum transmitted time delay and/or minimum RTT two-way time, and the SPS cycle is determined mapping relations with reservation HARQ number of processes relation.
Beneficial effect of the present invention is as follows:
In embodiments of the present invention, because network side will be sent to the UE side by the RRC signaling according to the indication information that the mapping relations that are preset in network side are determined, and mapping relations are determined according to SPS cycle and reservation HARQ number of processes relation; Therefore, the UE side is after receiving the RRC signaling, and the UE side just can be determined reservation HARQ number of processes indicated in the described indication information according to SPS cycle and the described mapping relations that are preset in the UE side.That is to say that UE just can directly understand according to mapping relations according to the SPS cycle and information implication indicated in the RRC signaling.So it is the indication scheme that SPS reserves the HARQ process that the embodiment of the invention has not only provided by RRC signaling UE.Can also make UE directly understand the implication of RRC signaling according to mapping relations, reduce the load of RRC signaling according to the SPS cycle.
Description of drawings
Fig. 1 is a VoIP business model schematic diagram in the embodiment of the invention;
Fig. 2 is for drawing the schematic diagram of HARQ process collision in the embodiment of the invention during for process of SPS reservation;
Fig. 3 is for reserving a plurality of processes to solve the schematic diagram of HARQ process collision for SPS in the embodiment of the invention;
The conflict schematic diagram of Fig. 4 when under the VoIP maximum delay, needing to stride across 3 processes in the embodiment of the invention;
Fig. 5 reserves HARQ process indicating means implementing procedure schematic diagram in the embodiment of the invention;
Fig. 6 is a reserved hybrid automatic repeat request process indication mechanism structural representation in the embodiment of the invention;
Fig. 7 is the network equipment structural representation of indication reserved hybrid automatic repeat request HARQ process in the embodiment of the invention;
Fig. 8 is for being used for the user device architecture schematic diagram of definite reserved hybrid automatic repeat request HARQ process of indicating in the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described.
The inventor notices in the invention process: the cycle of SPS does not decide fully at present, and the tendency of discussion is that TDD (Time Division Duplex, time division duplex) supports { 10,20,30,40,60,80,120,160,320,640}, FDD (Frequency Division Duplex, Frequency Division Duplexing (FDD)) supports { 10,20,32,40,64,80,128,160,320,640}, unit is ms (millisecond), and notifies UE the HARQ process number of reservation by the RRC signaling.Wherein the default value for FDD and TDD all is 20ms, why 20ms is that the default value of FDD and TDD is because 20ms is VoIP (Voice over IP, IP-based voice transfer) data arrive the cycle, Fig. 1 is a VoIP business model schematic diagram, as shown in Figure 1, the VoIP business mainly is divided into active period (talkspurt) and quiet period (silent period), and the VoIP of active period wraps big or small basic fixed, and the arrival cycle is 20ms; The packet of quiet period is littler than voice packets, and the arrival cycle is 160ms.The packet of active period adopts the SPS transmission, and the packet of quiet period adopts dynamic dispatching.In business model, be can not be greater than 50ms to the delay requirement of VoIP.
Why LTE reserves a plurality of processes and gives SPS, be because retransmitting leap SPS during the cycle, if having lacked UE, reservation just can only stop retransmitting, or scheduling retransmits, Fig. 2 causes the schematic diagram of HARQ process collision when reserving a process for SPS, as shown in Figure 2, under the situation of only staying a HARQ process, if double repeating transmission UE does not have and can correctly receive, and when retransmitting for the third time, crossed over the SPS cycle, repeating transmission at this moment just be can not determine to the repeating transmission of first packet or to the repeating transmission of second packet.
The problems referred to above can solve by reserving a plurality of HARQ processes, Fig. 3 for SPS reserves a plurality of processes to solve the schematic diagram of HARQ process collision, as shown in Figure 3, when reserving two processes, can be according at PDCCH (physical downlink control channel, Physical Downlink Control Channel) the 3rd packet that the HARQ process ID in is determined is the repeating transmission of x process, can determine that the 4th packet is the repeating transmission of process y according to the HARQ process ID among the PDCCH simultaneously.
When carrying out the VoIP business, if the SPS cycle is 20ms, and the maximum transmitted time delay is 50ms, will make DTD just cross over three HARQ processes possibly in the maximum transmitted time delay.That is to say, need to reserve at least 3 processes and could keep not conflicting of process.The conflict schematic diagram of Fig. 4 when under the VoIP maximum delay, needing to stride across 3 processes, as shown in Figure 4.In like manner, if be 10ms in the SPS cycle, or under the situation of SPS cycle less than 10ms, use could keep not conflicting of process to SPS just may to need to reserve more HARQ process.
In addition, RTT (Round Trip Time, two-way time) is for sending data, feedback NACK (affirmations), send the required time of retransmission data once more, to the minimum descending RTT of FDD be 8ms, RTT is relevant with subframe position with frame format with the TDD minimum.
As the above analysis, the process number of SPS reservation is relevant with SPS cycle, maximum transmitted time delay and minimum RTT.That is to say that when by RRC signaling UE being the indication of SPS reservation HARQ process, UE can understand the implication of RRC signaling according to the particular kind of relationship of SPS cycle, maximum transmitted time delay and minimum RTT, thereby reaches the purpose of indication HARQ process number.Further, can also reduce the load of RRC signaling.
In other words, because the HARQ process number of factor such as SPS cycle and required reservation has closely relation (in other words after factors such as SPS cycle are definite, the HARQ number of processes scope of its reservation is confirmable), therefore, from network side, only need the HARQ process number that additional a spot of information just can notify UE to reserve on RRC, and for the UE side, UE just can judge the process number of reservation by being preset in factor such as SPS cycle on the UE and the mapping relations between the reservation HARQ process number in conjunction with the information among the RRC after obtaining relevant information such as SPS cycle.Simultaneously can also because of utilize factor such as SPS cycle with reserve between the HARQ process number determine concern this rule, reduce the amount of information of the process number that carries on the RRC, and then the load of minimizing RRC signaling.
According to above-mentioned analysis, a kind of reservation HARQ process number indicating means is provided in the embodiment of the invention, below its embodiment is described.
Fig. 5 as shown in the figure, can comprise the steps: for reserving HARQ process indicating means implementing procedure schematic diagram
According to above-mentioned analysis, the HARQ number of processes not only has relation closely with the SPS cycle, and also there is close relation in it with maximum transmitted time delay, minimum RTT two-way time.Therefore, mapping relations can also be further according to the maximum transmitted time delay and/or minimum two-way time RTT, and the SPS cycle with reserve HARQ number of processes relation and determine.
In the step 501, because indication information is the obligating process number of determining according to mapping relations, i.e. indication be any situation in the aforementioned many-one relationship, therefore, when expressing same number, always can be owing to the relation between SPS cycle and the reservation HARQ number of processes uses amount of information still less to express.Such as: when need are expressed four processes of reservation, need 2 bit to represent usually at least; Yet owing to have relation between SPS and the HARQ, and SPS is under the cycle accordingly, its number of processes that may reserve is 2 kinds of situations determining,, so only need 1bit can give expression to the number of processes of this SPS under the cycle.Analyze as preceding, when the SPS cycle is 10ms, its possible obligating process number is 2 or 3, therefore, after having determined that SPS is 10ms, only make and just can indicate possible number of processes with a bit, 2 HARQ processes are reserved in expression as bit " 0 ", and bit " 1 " then represents to reserve 3 HARQ processes.That is to say, utilize the SPS cycle and reserve the mapping relations of the rule setting between the HARQ number of processes can be in same bit extra indicate more information.
Situation when further being different ms with the SPS cycle is more below come why solving the HARQ process of notice UE reservation and can make RRC realize that with still less loading the HARQ process of notifying UE to reserve describes why with these mapping relations.
From the above, at present typical VoIP business, the HARQ process number that needs is 1～3.Just also may need to reserve more HARQ process for the littler SPS cycle.
In order to simplify the load of RRC signaling, can stipulate to keep for the HARQ process of SPS upwards to reserve continuously from process number 0 beginning of minimum, can certainly begin from the process number of maximum to reserve downwards continuously.Such effect is the same.Can significantly reduce expression and reserve the bit number of HARQ process.Such as only just representing reservation to process 0～process 3 with 2 bits.In concrete the enforcement, behind indication obligating process number, by reserving from minimum or from the mode of maximum, then can when the indication number of processes, just can reach the purpose of indication process number, beginning to stay two such as indication from minimum, is 0 o'clock at minimum process number, and that is exactly process 0 and process 1 undoubtedly.
For 30ms and above SPS cycle, then striding across two HARQ processes is 60ms or bigger, can obtain can holding at least 4 re-transmissions in the cycle at two SPS according to minimum RTT, therefore maximum retransmission can be set is 4, and guarantees can retransmit in the SPS transmission cycle 4 times by scheduling.Consider to consider to reserve minimum 3 processes in order to compromise at the process number of the load of RRC signaling and reservation.
Can adopt the process number of multiple scheme according to above analysis by RRC signaling UE reservation, for example:
Scheme one:
Can adopt three kinds of state representation of two bits to reserve a process, two processes, three kinds of situations of three processes, remaining state temporarily can not use.
Scheme two:
Also can reserve a process, two processes, three processes or four processes with four kinds of state representation of two bits.
, when crossing over two processes,, can carry out 4 times at least according to minimum RTT calculating FDD and retransmit, and TDD can carry out having retransmitted for three times at least, and the probability of re-transmission failure is very little more than three times at the VoIP business if at this moment last process does not have transmission correct.If correct data abandon that to influence meeting very little also not transmitting of receiving in next SPS cycle like this, so also can adopt a bit to represent to reserve the situation of 1 process and two processes.And equal 10ms and less than the situation of 10ms, it is not enough reserving a HARQ process for the SPS cycle, then can adopt this moment the another one bit to identify 2 or 3 the HARQ processes reserved.
Scheme three:
Represent only to reserve 1 or two HARQ processes greater than 1 bit that can adopt of 30ms at interval for SPS, the obligating process number is from maximum or minimum beginning and reservation continuously equally.
1 bit that can adopt that is equal to or less than 10ms for SPS at interval represents to reserve 2 or three HARQ processes, and same obligating process number is from maximum or minimum beginning and continuous the reservation.
Because the SPS cycle is that 20ms is more special, can carry out 3 to 4 times when striding across three transmission and retransmit, therefore promptly can adopt 1 process or 2 processes also can adopt the scheme of 2 processes or 3 processes to the situation that equals 20ms at interval with SPS.But after regulation, just no longer change.
Based on same inventive concept, the present invention also provides a kind of reserved hybrid automatic repeat request process indication mechanism, a kind of network equipment of reserved hybrid automatic repeat request process, a kind of subscriber equipment that is used for the reserved hybrid automatic repeat request process of definite indication of indicating, owing to all be based on same inventive concept, the principle of its technical solution problem is similar, therefore the concrete enforcement that the execution mode in system and the equipment can reference method, the place of repetition no longer describes.
Fig. 6 is a reserved hybrid automatic repeat request process indication mechanism structural representation, as shown in the figure, comprises network equipment 601, UE602 in the system, wherein:
The indication information that is used for determining according to mapping relations at network equipment 601 is sent to subscriber equipment by radio resource control signaling, and described mapping relations comprise the relation between semi-continuous scheduling cycle and the reserved hybrid automatic repeat request number of processes;
After UE602 is used for receiving radio resource control signaling, determine reserved hybrid automatic repeat request number of processes indicated in the described indication information according to the employed semi-continuous scheduling of user equipment side cycle and mapping relations, described mapping relations comprise the relation between semi-continuous scheduling cycle and the reserved hybrid automatic repeat request number of processes.
In the enforcement,, determine mapping relations according to SPS cycle and reservation HARQ number of processes relation earlier in network equipment one side; To be sent to UE by the RRC signaling according to the indication information that mapping relations are determined then;
In UE one side, be preset with according to SPS cycle and reservation HARQ number of processes relation and determine mapping relations; After receiving the RRC signaling, just can determine reservation HARQ number of processes indicated in the described indication information like this according to SPS cycle and mapping relations.
In the system, described network equipment can be further used for determining mapping relations, and described mapping relations comprise maximum transmitted time delay and/or minimum two-way time, and the relation between semi-continuous scheduling cycle and the reserved hybrid automatic repeat request number of processes;
Described subscriber equipment is further used for determining mapping relations, and described mapping relations comprise maximum transmitted time delay and/or minimum two-way time, and the relation between semi-continuous scheduling cycle and the reserved hybrid automatic repeat request number of processes.
In network equipment, can also be further used for and to keep for the HARQ process of SPS upwards to reserve continuously, or begin to reserve downwards continuously from the process number of maximum from process number 0 beginning of minimum.
Fig. 7 is the network equipment structural representation of indication reserved hybrid automatic repeat request HARQ process, as shown in the figure, can comprise in the network equipment:
Sending module 6012, the indication information that is used for determining according to mapping relations is sent to UE by the RRC signaling.
Wherein, mapping block can also be further used for according to maximum transmitted time delay and/or minimum RTT two-way time, and the SPS cycle is determined mapping relations with reservation HARQ number of processes relation.
Can further include in network equipment: process is reserved module 6013, is used for keeping for the HARQ process of SPS upwards to reserve continuously from process number 0 beginning of minimum, or begins to reserve downwards continuously from the process number of maximum.
Fig. 8 is the user device architecture schematic diagram that is used for the reserved hybrid automatic repeat request HARQ process of definite indication, as shown in the figure, can comprise among the UE:
Wherein, mapping block can be further used for according to maximum transmitted time delay and/or minimum RTT two-way time, and the SPS cycle is determined mapping relations with reservation HARQ number of processes relation.
By above-mentioned enforcement as seen, UE can directly understand the situation of obligating process according to different states in embodiments of the present invention.Concrete, UE just is appreciated that the implication of RRC signaling according to mapping relations according to the SPS cycle.Therefore, not only to have provided by RRC signaling UE be the indication scheme that SPS reserves the HARQ process to the embodiment of the invention.Can also make UE directly understand the implication of RRC signaling according to mapping relations, also reduce the load of RRC signaling according to the SPS cycle.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (11)
1, a kind of reserved hybrid automatic repeat request process indicating means is characterized in that, comprises the steps:
Determine indication information according to the mapping relations that are preset in network side, network side is sent to user equipment side with this indication information by radio resource control signaling, and described mapping relations comprise the relation between the hybrid automatic repeat request process number of semi-continuous scheduling cycle and reservation;
User equipment side is determined reserved hybrid automatic repeat request number of processes indicated in the described indication information according to semi-continuous scheduling cycle and the described mapping relations that are preset in user equipment side after receiving radio resource control signaling.
2, the method for claim 1 is characterized in that, described mapping relations comprise maximum transmitted time delay and/or minimum two-way time, and the relation between semi-continuous scheduling cycle and the reserved hybrid automatic repeat request number of processes.
3, method as claimed in claim 1 or 2 is characterized in that, further comprises:
The hybrid automatic repeat request process of keeping for semi-continuous scheduling begins upwards to reserve continuously from the process number of minimum, or begins to reserve downwards continuously from the process number of maximum.
4, a kind of reserved hybrid automatic repeat request process indication mechanism is characterized in that,
Network equipment, the indication information that is used for determining according to mapping relations is sent to subscriber equipment by radio resource control signaling, and described mapping relations comprise the relation between semi-continuous scheduling cycle and the reserved hybrid automatic repeat request number of processes;
Subscriber equipment, be used for after receiving radio resource control signaling, determine reserved hybrid automatic repeat request number of processes indicated in the described indication information according to the employed semi-continuous scheduling of subscriber equipment cycle and mapping relations, described mapping relations comprise the relation between semi-continuous scheduling cycle and the reserved hybrid automatic repeat request number of processes.
5, system as claimed in claim 4, it is characterized in that, described network equipment is further used for determining mapping relations, and described mapping relations comprise maximum transmitted time delay and/or minimum two-way time, and the relation between semi-continuous scheduling cycle and the reserved hybrid automatic repeat request number of processes;
Described subscriber equipment is further used for determining mapping relations, and described mapping relations comprise maximum transmitted time delay and/or minimum two-way time, and the relation between semi-continuous scheduling cycle and the reserved hybrid automatic repeat request number of processes.
6, as claim 4 or 5 described systems, it is characterized in that, the hybrid automatic repeat request process that network equipment is further used for keeping for semi-continuous scheduling begins upwards to reserve continuously from the process number of minimum, or begins to reserve downwards continuously from the process number of maximum.
7, a kind of network equipment of indicating the reserved hybrid automatic repeat request process is characterized in that, comprising:
Mapping block is used for determining mapping relations that described mapping relations comprise the relation between semi-continuous scheduling cycle and the reserved hybrid automatic repeat request number of processes;
Sending module, the indication information that is used for determining according to mapping relations is sent to subscriber equipment by radio resource control signaling.
8, network equipment as claimed in claim 7, it is characterized in that, described mapping block was further used for according to maximum transmitted time delay and/or minimum two-way time, and semi-continuous scheduling cycle and the definite mapping relations of reserved hybrid automatic repeat request number of processes relation.
9, as claim 7 or 8 described network equipments, it is characterized in that, further comprise:
Process is reserved module, and the hybrid automatic repeat request process that is used for keeping for semi-continuous scheduling begins upwards to reserve continuously from the process number of minimum, or begins to reserve downwards continuously from the process number of maximum.
10, a kind of subscriber equipment that is used for the reserved hybrid automatic repeat request process of definite indication is characterized in that, comprising:
Mapping block is used for determining mapping relations according to semi-continuous scheduling cycle and reserved hybrid automatic repeat request number of processes relation;
Determination module is used for after receiving radio resource control signaling, determines reserved hybrid automatic repeat request number of processes indicated in the described indication information according to semi-continuous scheduling cycle and mapping relations.
11, subscriber equipment as claimed in claim 10, it is characterized in that, described mapping block was further used for according to maximum transmitted time delay and/or minimum two-way time, and semi-continuous scheduling cycle and the definite mapping relations of reserved hybrid automatic repeat request number of processes relation.
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