Summary of the invention
The present invention provides a kind of reserved hybrid automatic repeat request process indicating means, system and equipment, notifies UE to reserve the problem of HARQ process in order to solve through the RRC signaling.
The embodiment of the invention provides a kind of reserved hybrid automatic repeat request HARQ process indicating means, comprises the steps:
Mapping relations according to being preset in network side are confirmed indication information; Network side is sent to user equipment side with this indication information through radio resource control signaling, and said 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 said indication information according to semi-continuous scheduling cycle and the said mapping relations that are preset in user equipment side after receiving radio resource control signaling.
Preferably, said 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 comprises:
Mapping block is used for confirming mapping relations that said mapping relations comprise the relation between semi-continuous scheduling cycle and the reserved hybrid automatic repeat request number of processes;
Sending module is used for the indication information of confirming according to mapping relations is sent to subscriber equipment through radio resource control signaling;
Subscriber equipment comprises:
Mapping block is used for confirming 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 said indication information according to semi-continuous scheduling cycle and mapping relations.
Preferably; The mapping block of said network equipment is further used for confirming mapping relations; Said 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;
The mapping block of said subscriber equipment is further used for confirming mapping relations, and said 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, said network equipment also comprises:
Process is reserved module, is further used for the process number of the HARQ process of keeping for SPS from minimum begun upwards to reserve continuously, 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 confirming 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 said indication information according to SPS cycle and mapping relations.
Preferably, said mapping block is further used for according to maximum transmitted time delay and/or minimum RTT two-way time, and the SPS cycle is confirmed mapping relations with reservation HARQ number of processes relation.
Beneficial effect of the present invention is following:
In embodiments of the present invention, because network side will be sent to the UE side through the RRC signaling according to the indication information that the mapping relations that are preset in network side are confirmed, and mapping relations are confirmed 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 said indication information according to SPS cycle and the said 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 through 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.
Embodiment
Describe below in conjunction with the accompanying drawing specific embodiments of the invention.
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; 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 through 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 that Fig. 1 is a VoIP business model sketch map because 20ms is the data arrives cycle of VoIP (Voice over IP, IP-based voice transfer); 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, just can only stop retransmitting if UE has been lacked in reservation, or scheduling retransmit; Fig. 2 causes the sketch map 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 is not sure of to the repeating transmission of first packet or to the repeating transmission of second packet.
The problems referred to above can solve through reserving a plurality of HARQ processes; Fig. 3 for SPS reserves a plurality of processes to solve the sketch map 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 confirmed is the repeating transmission of x process, can confirm 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, in the maximum transmitted time delay, will make DTD just cross over three HARQ processes possibly.That is to say, need to reserve at least 3 processes and could keep not conflicting of process.Fig. 4 is the conflict sketch map in the time of under the VoIP maximum delay, need striding across 3 processes, and is 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 possibly 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.
Can know that by above-mentioned analysis the process number that SPS reserves is relevant with SPS cycle, maximum transmitted time delay and minimum RTT.That is to say that when through 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 combines the information among the RRC just can judge the process number of reservation through being preset in mapping relations between factor such as SPS cycle on the UE and the reservation HARQ process number 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 confirm 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, describe in the face of its embodiment down.
Fig. 5 is for reserving HARQ process indicating means implementing procedure sketch map, and is as shown in the figure, can comprise the steps:
Step 501, basis are preset in the mapping relations of network side and confirm indication information, and network side is sent to UE with this indication information through the RRC signaling, and said mapping relations comprise the SPS cycle and reserve the relation between the HARQ number of processes.
Step 502, UE side are after receiving the RRC signaling, and the UE lateral root is determined reservation HARQ number of processes indicated in the said indication information according to SPS cycle and the said mapping relations that are preset in the UE side.
Step 501 is all confirmed according to SPS cycle and reservation HARQ number of processes relation with the mapping relations in the step 502; It is arranged on network side and UE side respectively in advance; Network side concerns to confirm indication information according to this, and the UE side then parses the content of indication information according to this relation.In most cases, a kind of SPS cycle is the relation of one-to-many with reserving the HARQ number, and for example, for the SPS cycle of 10ms, its corresponding reservation HARQ can be 2, also can be 3; And for example: in the SPS cycle of 60ms, its corresponding reservation HARQ can be 3, also can be 4.Concrete selection is reserved several, is confirmed by network side.
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 confirm.
In the step 501; Because indication information is the obligating process number of confirming according to mapping relations; Promptly indication is 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 possibly reserve is 2 kinds of situation confirming,, 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 was 10ms, its possible obligating process number was 2 or 3, therefore; After having confirmed that SPS is 10ms; Only make and just can indicate possible number of processes with a bit, 2 HARQ processes are reserved in expression like bit " 0 ", and bit " 1 " then representes 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 using the SPS cycle for different ms is below again 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 is professional, and the HARQ process number that needs is 1~3.Just also possibly 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 fromprocess 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 the practical implementation, behind indication obligating process number, through 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 exactlyprocess 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 in the SPS transmission cycle, can retransmit 4 times through 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 kinds of schemes to pass through the process number that RRC signaling UE reserves according to above analysis, for example:
Scheme one:
Can adopt three kinds of STA representations of two bits to reserve a process, two processes, three kinds of situation of three processes, remaining state temporarily can not use.
Scheme two:
Also can use four kinds of STA representations of two bits to reserve a process, two processes, three processes or four processes.
, 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 to the VoIP business if at this moment last process does not have transmission correct.If proper data abandons 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 representes 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, so the practical implementation that the execution mode in system and the equipment can reference method, and the place of repetition no longer describes.
Fig. 6 is reserved hybrid automatic repeat request process indication mechanism structural representation, and is as shown in the figure, comprisesnetwork equipment 601, UE602 in the system, wherein:
Be used for the indication information of confirming according to mapping relations is sent to subscriber equipment through radio resource control signaling atnetwork equipment 601, said 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 said indication information according to the employed semi-continuous scheduling of user equipment side cycle and mapping relations, said mapping relations comprise the relation between semi-continuous scheduling cycle and the reserved hybrid automatic repeat request number of processes.
In the enforcement,, confirm mapping relations according to SPS cycle and reservation HARQ number of processes relation earlier in network equipment one side; To be sent to UE through the RRC signaling according to the indication information that mapping relations are confirmed then;
In UE one side, be preset with according to SPS cycle and reservation HARQ number of processes relation and confirm mapping relations; After receiving the RRC signaling, just can determine reservation HARQ number of processes indicated in the said indication information like this according to SPS cycle and mapping relations.
In the system, said network equipment can be further used for confirming mapping relations, and said 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;
Said subscriber equipment is further used for confirming mapping relations, and said 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 the HARQ process of keeping for SPS is upwards reserved fromprocess number 0 beginning of minimum continuously, or begin to reserve downwards continuously from the process number of maximum.
Fig. 7 is for the network equipment structural representation of indication reserved hybrid automatic repeat request HARQ process, and is as shown in the figure, can comprise in the network equipment:
Mapping block 6011 is used for confirming mapping relations, and said mapping relations comprise the SPS cycle and reserve the relation between the HARQ number of processes;
Sendingmodule 6012 is used for the indication information of confirming according to mapping relations is sent to UE through 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 confirmed mapping relations with reservation HARQ number of processes relation.
In network equipment, can further include: process is reservedmodule 6013, is used for the HARQ process of keeping for SPS is upwards reserved fromprocess number 0 beginning of minimum continuously, or begins to reserve downwards continuously from the process number of maximum.
Fig. 8 is the user device architecture sketch map that is used for the reserved hybrid automatic repeat request HARQ process of definite indication, and is as shown in the figure, can comprise among the UE:
Mapping block 6021 is used for confirming mapping relations, and said mapping relations comprise the SPS cycle and reserve the relation between the HARQ number of processes;
Determination module 6022 is used for after receiving the RRC signaling, determines reservation HARQ number of processes indicated in the said indication information according to SPS cycle and mapping relations.
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 confirmed mapping relations with reservation HARQ number of processes relation.
Visible by above-mentioned enforcement, UE can directly understand the situation of obligating process according to different state 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 through 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, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.