CN101932111A - Method and system for resource scheduling between enhanced base stations - Google Patents
Method and system for resource scheduling between enhanced base stations Download PDFInfo
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Abstract
The invention discloses a method for resource scheduling between enhanced base stations, comprising: configuring resource in a resource reservation queue and time corresponding to the resource; a service enhanced base station (eNB) notifies the resource and the time corresponding to the resource to a non-service eNB; the service eNB and the non-service eNB jointly send or jointly receive data on the resource according to the time corresponding to the resource. The invention also discloses a system for resource scheduling between enhanced base stations. In the system, a configuration unit is used for configuring the resource in the resource reservation queue and the time corresponding to the resource; and a notification unit is used for the service eNB to notify the configured resource and time corresponding to the resource to the non-service eNB. The method and the system of the invention not only can avoid multiple transmitting scheduling information frequently between the service eNB and the non-service eNB while realizing resource scheduling, but also can satisfy the time sequence requirement of retransmitting mixed automatic requests.
Description
Technical field
The present invention relates to wireless communication technology field, relate in particular to that a kind of (eNB carries out the method and system of scheduling of resource between EvolvedNodeB) at enhanced base station.
Background technology
3G (Third Generation) Moblie Long Term Evolution (LTE, Long Term Evolution) Evolved UTRAN (E-UTRAN of system, Evolved Universal Terrestrial Radio Access Network) in, the data of Uplink/Downlink are by last/DSCH Downlink Shared Channel transmission.Give each subscriber equipment (UE) by the eNB Resources allocation.The access technology that E-UTRAN adopts is OFDM (OFDM, OrthogonalFrequency Division Multiplexing) technology, the RRM of E-UTRAN system is compared with second generation mobile communication system, characteristics with big bandwidth, process of many time, its Radio Resource occurs with time and frequency bidimensional, and the number of users that can carry increases greatly.
In the LTE system, the dynamic dispatching of eNB employing generally mode is that UE distributes the up-downgoing air interface resource.When downlink data need send, eNB is at Physical Downlink Control Channel (PDCCH, Physical Downlink Control Channel) gives capable resource assignation (DL Assignment up and down, Downlink Assignment) signaling, in signaling, carry the interface-free resources map information of downlink data transmission, modulation and coded message etc.; When UE is detecting one's own DL Assignment on the PDCCH after, promptly go up downlink data receiving at the Physical Downlink Shared Channel (PDSCH, Physical DownlinkShared CHannel) of same subframe (subframe).When UE had upstream data to send, the capable physically control channel (PUCCH, Physical Uplink Control CHannel) of UE was gone up the request of transmission scheduling of resource and is sent the required interface-free resources of upstream data to the eNB application.ENB issues uplink permission (UL Grant, Uplink Grant) signaling on PDCCH, carry the interface-free resources map information of transmitting uplink data in signaling, modulation and coded message etc.; When UE was detecting one's own UL Grant on the PDCCH after, promptly the Physical Uplink Shared Channel of the 4th subframe (n+3) (PUSCH, PhysicalUplink Shared CHannel) was gone up and is sent upstream data behind this subframe n.The characteristics of dynamic dispatching mode are that (UL, Uplink) data send or descending (DL, Downlink) all to need eNB be that UL Grant or DL Assignment come explicit assigned resources by dispatch command on PDCCH to Data Receiving for UE up each time.
Have obviously periodic characteristics for some professional its data transmit-receive, for example the professional VoP of IP phone (VoIP, Voiceover IP) is one of every 20ms.There is no need in this case to be each packet dynamic assignment interface-free resources, and can adopt semi-persistent scheduling (SPS, Semi-Persistent Scheduling) mode.ENB reserves certain interface-free resources for receiving this professional UE, and notifies UE with DLAssignment or UL Grant mode when first packet of transmitting-receiving on PDCCH.The SPS mode is different from the dynamic dispatching mode and uses different MAC layer signs, and wherein dynamic dispatching mode uses C-RNTI to indicate; The SPS mode uses SPS-RNTI to indicate, thus UE can to distinguish this scheduling of resource be dynamic dispatching mode or SPS mode.In data packet transceive subsequently, UE need not receive the instruction of corresponding scheduling of resource on PDCCH, but according to the pre-configured SPS cycle automatically in the enterprising line data transmitting-receiving of identical resource.The SPS mode has reduced owing to the frequent expense that transmission scheduling of resource signaling causes on PDCCH.
For being positioned at the UE that eNB covers the edge, may receive wireless signal simultaneously near several adjacent base stations, the wireless signal of its emission also can be received by near a plurality of base stations.In this case, can coordinate a plurality of base stations and simultaneously this UE be carried out uniting of up-downgoing data receiving and sending, Here it is, and so-called associating multiple spot is handled (CoMP, Coordinated Multiple Point) technology.Utilize CoMP and relevant signal processing technology, can play the gain of data diversity and spatial reuse, improve the reliability and the data throughout of wireless data transmission the up-downgoing wireless signal.
A plurality of neighbor cells of CoMP participating cooperation may belong to same eNB control, also may belong to different eNB.When the CoMP cooperation occurs between the different e NB, UE only accepts the instruction of up-downgoing scheduling of resource on the PDCCH of an eNB therein, also only upload and mix automatic request retransmission (HARQ, Hybrid Automatic Repeat reQuest) feedback information and other measurement report information to same eNB.This eNB is called service eNB, other be non-service eNB.Under the collaborative scene of a plurality of eNB CoMP participatings, for reaching the purpose that the up-downgoing data aggregate sends, receives, service eNB need send to non-service eNB by X2 interface between eNB with scheduling of resource instruction, from but not service eNB can with service eNB on identical time, frequency resource to/from UE transmission/reception data.As shown in Figure 1.
Under the collaborative scene of a plurality of eNB CoMP participatings, if adopt the dynamic dispatching mode fully, then corresponding to each up-downgoing transfer of data, service eNB all must be notified to non-service eNB with corresponding resource scheduling information before transfer of data.Consider that Transmission Time Interval (TTI, Transport Time Interval) only is 1ms, issuing of dynamic dispatching instruction may be very frequent, that is to say between service eNB and non-service eNB and also will transmit schedule information continually.In addition, existing HARQ issues dispatch command, transfer of data, and the HARQ feedback, actions such as data re-transmission have strict sequential requirement.For example require after UL or DL transfer of data 4ms, to send the HARQ feedback.When CoMP is collaborative when occurring between a plurality of eNB, a large amount of schedule informations and data need transmit by the X2 interface between the eNB, the transmission delay of X2 interface will require to cause very big difficulty with relevant processing time-delay to keeping the HARQ sequential, even can't satisfy the requirement of HARQ sequential.
In sum, under the collaborative scene of a plurality of eNB CoMP participatings, adopt existing dynamic dispatching mode fully, have the shortcoming of two aspects, on the one hand: between service eNB and non-service eNB, need repeatedly to transmit continually schedule information; On the other hand: repeatedly transmit the time-delay that schedule information causes, be unfavorable for keeping even can't satisfying the sequential requirement of HARQ.At present, still do not have effective resource scheduling scheme, can avoid the shortcoming of above-mentioned two aspects.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method and system of carrying out scheduling of resource between eNB, when realizing scheduling of resource, can not only avoid between service eNB and non-service eNB, repeatedly transmitting schedule information continually, and can satisfy the sequential requirement of HARQ.
For achieving the above object, technical scheme of the present invention is achieved in that
Carry out the method for scheduling of resource between a kind of enhanced base station, this method comprises:
Resource in the resource allocation reserved queue and with the corresponding moment of resource;
Service enhanced base station (eNB) the described resource that will dispose and notify non-service eNB with the corresponding moment of described resource;
Described service eNB and the described non-service eNB basis and the corresponding moment of described resource, on described resource, unite transmission simultaneously or unite the reception data.
Wherein, when adopting the dynamic dispatching mode, described service eNB is notified described non-service eNB by the X2 interface scheduling message; Wherein, comprise in the described X2 interface scheduling message: each resource Ri that disposes in the described resource reservation formation and with the corresponding moment Ti of each resource; I is the integer more than or equal to 1;
Under downlink data transmission situation, described service eNB and described non-service eNB are united the transmission downlink data simultaneously constantly at Ti on Ri; Perhaps, under the upstream data reception condition, described service eNB and described non-service eNB are received upstream data at Ri first line of a couplet splice grafting constantly simultaneously at Ti+4ms.
Wherein, under downlink data transmission situation, before uniting the transmission downlink data on the Ri, also comprise:
Give subscriber equipment (UE) in Ti described service eNB of the moment with downlink resource assignment transmitting signaling downwards; Wherein, the resource of described downlink resource assignment signaling appointment is described Ri;
Also comprise after on Ri, uniting the transmission downlink data:
After described UE detects described downlink resource assignment signaling, Ti constantly UE on described Ri, receives service eNB and non-service eNB and unites the merging of transmission and decode;
After the data decode success, UE replys to successful respond or the failure of the automatic request retransmission HARQ of service eNB feedback mixing constantly at Ti+4ms.
Wherein, under the upstream data reception condition, before receiving upstream data, Ri first line of a couplet splice grafting also comprises:
Permit transmitting signaling downwards to give UE uplink in Ti described service eNB of the moment; Wherein, the resource of described uplink permission signaling appointment is described Ri;
UE sends upstream data at Ti+4ms moment UE after detecting described uplink permission signaling on described Ri;
After receiving upstream data, Ri first line of a couplet splice grafting also comprises:
Non-service eNB is transmitted to service eNB with the upstream data that is received; Service eNB is replied to successful respond or the failure of UE feedback HARQ constantly at Ti+8ms after decoding successfully to the upstream data merging that receives.
Wherein, when adopting semi-persistent scheduling (SPS) mode, described eNB notifies described non-service eNB by the X2 interface scheduling message; Wherein, comprise in the described X2 interface scheduling message: each the identical resource R that disposes in the described resource reservation formation, with corresponding initial time T1 of initial resource and semi-persistent scheduling cycle SPS_Period;
Under downlink data transmission situation, during initial condition, described service eNB and described non-service eNB are united the transmission downlink data simultaneously constantly at T1 on described R; Every when reaching a SPS_Period state, described service eNB and described non-service eNB are united the transmission downlink data simultaneously at T1+SPS_Period constantly on described R;
Perhaps, under the upstream data reception condition, during initial condition, described service eNB and described non-service eNB are received upstream data at described R first line of a couplet splice grafting constantly simultaneously at T1+4ms; Every when reaching a SPS_Period state, described service eNB and described non-service eNB are united the transmission downlink data simultaneously at T1+SPS_Period constantly on described R.
Wherein, under downlink data transmission situation, during initial condition, before uniting the transmission downlink data on the R, also comprise:
Give UE in T1 described service eNB of the moment with downlink resource assignment transmitting signaling downwards; Wherein, the resource of described downlink resource assignment signaling appointment is described R;
Also comprise after on R, uniting the transmission downlink data:
After described UE detects described downlink resource assignment signaling, T1 constantly UE on described R, receives service eNB and non-service eNB and unites the merging of transmission and decode;
After the data decode success, UE replys to successful respond or the failure of service eNB feedback HARQ constantly at T1+4ms.
Wherein, under the upstream data reception condition, during initial condition, before receiving upstream data, R first line of a couplet splice grafting also comprises:
Permit transmitting signaling downwards to give UE uplink in T1 described service eNB of the moment; Wherein, the resource of described uplink permission signaling appointment is described R;
After UE detected described uplink permission signaling, at T1+4ms constantly, UE sent upstream data on described R;
After receiving upstream data, R first line of a couplet splice grafting also comprises:
Non-service eNB is transmitted to service eNB with the upstream data that is received; Service eNB is replied to successful respond or the failure of UE feedback HARQ constantly at T1+8ms after decoding successfully to the upstream data merging that receives.
Carry out the system of scheduling of resource between a kind of enhanced base station, this system comprises: dispensing unit, notification unit and transmitting element/receiving element; Wherein,
Dispensing unit, be used for the resource allocation reserved queue resource and with the corresponding moment of resource;
Notification unit is used for described resource that service eNB will dispose and notifies non-service eNB with the corresponding moment of described resource;
Transmitting element is used for described service eNB and the described non-service eNB basis and the corresponding moment of described resource, unites the transmission data simultaneously on described resource; Perhaps, receiving element is used for described service eNB and the described non-service eNB basis and the corresponding moment of described resource, receives data at described resource first line of a couplet splice grafting simultaneously.
Wherein, described notification unit is further used for adopting under the dynamic dispatching mode state, and described service eNB is notified described non-service eNB by the X2 interface scheduling message; Wherein, comprise in the described X2 interface scheduling message: each resource Ri that disposes in the described resource reservation formation and with the corresponding moment Ti of each resource; I is the integer more than or equal to 1;
Described transmitting element is further used for described service eNB and described non-service eNB and unites the transmission downlink data constantly simultaneously at Ti on Ri.
Wherein, described notification unit is further used for adopting under the dynamic dispatching mode state, and described service eNB is notified described non-service eNB by the X2 interface scheduling message; Wherein, comprise in the described X2 interface scheduling message: each resource Ri that disposes in the described resource reservation formation and with the corresponding moment Ti of each resource; I is the integer more than or equal to 1;
Receiving element is further used for described service eNB and described non-service eNB and receives upstream data at Ri first line of a couplet splice grafting simultaneously constantly at Ti+4ms.
Wherein, described notification unit is further used for adopting under the SPS mode state, and described eNB notifies described non-service eNB by the X2 interface scheduling message; Wherein, comprise in the described X2 interface scheduling message: each the identical resource R that disposes in the described resource reservation formation, with corresponding initial time T1 of initial resource and SPS_Period;
Described transmitting element, when being further used for initial condition, described service eNB and described non-service eNB are united the transmission downlink data simultaneously constantly at T1 on described R; Every when reaching a SPS_Period state, described service eNB and described non-service eNB are united the transmission downlink data simultaneously at T1+SPS_Period constantly on described Ri.
Wherein, described notification unit is further used for adopting under the SPS mode state, and described eNB notifies described non-service eNB by the X2 interface scheduling message; Wherein, comprise in the described X2 interface scheduling message: each the identical resource R that disposes in the described resource reservation formation, with corresponding initial time T1 of initial resource and SPS_Period;
Described receiving element, when being further used for initial condition, described service eNB and described non-service eNB are received upstream data at described R first line of a couplet splice grafting constantly simultaneously at T1+4ms; Every when reaching a SPS_Period state, described service eNB and described non-service eNB are united the transmission downlink data simultaneously at T1+SPS_Period constantly on described Ri.
Resource in the resource allocation reserved queue of the present invention and with the corresponding moment of resource; Service eNB is notified non-service eNB with the resource of configuration with the corresponding moment of resource; Service eNB and the non-service eNB basis and the corresponding moment of resource, on resource, unite transmission simultaneously or unite the reception data.
The present invention is not changing existing HARQ mechanism to guarantee under the compatible prerequisite, by changing the realization technology of scheduling of resource, that is: service eNB and non-service eNB are at first appointed the moment that will send or receive data in advance in the mode of notice, and the resource corresponding with this moment, this resource promptly sends the resource location of data; Afterwards, service eNB and the non-service eNB basis and the corresponding moment of resource, on resource, unite transmission simultaneously or unite the reception data, reduce with this and repeatedly transmit the time-delay influence next that schedule information causes the CoMP data carousel.Adopt resource scheduling scheme of the present invention to have the advantage of two aspects, on the one hand: make and under the collaborative CoMP scene of a plurality of eNB, can reduce frequent necessity of transmitting schedule information between service eNB and non-service eNB, can guarantee that simultaneously service eNB and non-service eNB can carry out the active data joint transmission under this resource scheduling scheme, realize the gain that CoMP brought; On the other hand, can effectively alleviate of the strict demand of HARQ sequential, even make the sequential requirement that under bigger X2 time delay, also can satisfy existing HARQ mechanism for the X2 transmission delay by this resource scheduling scheme.
Description of drawings
Fig. 1 utilizes the CoMP technology to carry out the schematic network structure of a plurality of eNB Combined Treatment;
Fig. 2 carries out the schematic diagram of scheduling of resource and data transmission between eNB for the application resource reserved queue;
Fig. 3 is the realization flow schematic diagram of the present invention one method embodiment;
Fig. 4 is the realization flow schematic diagram of other method embodiment of the present invention;
Fig. 5 is the realization flow schematic diagram of the another method embodiment of the present invention.
Embodiment
Basic thought of the present invention is: service eNB and non-service eNB according to the resource of appointing in advance and with the corresponding moment of resource, on resource, unite simultaneously and send or unite the reception data.
Be described in further detail below in conjunction with the enforcement of accompanying drawing technical scheme.
Carry out the method for scheduling of resource between a kind of eNB, this method may further comprise the steps:
Resource in step 101, the resource allocation reserved queue and with the corresponding moment of resource.
Here, generally include a plurality of resources in the resource reservation formation, first resource can be called initial resource, can be called initial time with the corresponding moment of initial resource.
Here, the concrete processing procedure after the step 102 is had nothing in common with each other when sending or receive data, below sets forth respectively.
When sending data, also comprise after the step 102:
Step 1031, service eNB and the non-service eNB basis and the corresponding moment of resource are united the transmission data simultaneously on resource.
When receiving data, also comprise after the step 102:
Step 1032, service eNB and the non-service eNB basis and the corresponding moment of resource are received data at resource first line of a couplet splice grafting simultaneously.
Here, this method further comprises: the resource of different transmissions constantly or reception The data is at same frequency domain or different frequency domain.
At above by step 101～step 1031 or by technical scheme that step 101～step 1032 constituted, when adopting dynamic dispatching mode or SPS mode, the concrete processing procedure of these two technical schemes is had nothing in common with each other, and is situation about sending at downlink data by the technical scheme that step 101～step 1031 constituted; And be situation about receiving at upstream data by the technical scheme that step 101～step 1032 constituted, below set forth respectively.
First kind of situation: when adopting the dynamic dispatching mode, at above by technical scheme that step 101～step 1031 constituted, in the step 102, service eNB is notified non-service eNB further by the X2 interface scheduling message with the resource of configuration with the corresponding moment of resource.
Wherein, comprise in the X2 interface scheduling message: each resource Ri that disposes in the resource reservation formation and with the corresponding moment Ti of each resource.I is＞=1 integer, and when i=1, R1 represents the initial resource in the resource reservation formation, and T1 represents the corresponding initial time with initial resource R1.
In the step 1031, service eNB and non-service eNB are further united simultaneously the transmission downlink data constantly at Ti on Ri.
Here, before uniting the transmission downlink data on the Ri, also comprise: give UE with the DLAssignment transmitting signaling downwards in Ti moment service eNB; Wherein, the resource of DL Assignment signaling appointment is Ri.
Here, on Ri, unite and also comprise after sending downlink data: after UE detects DL Assignment signaling, Ti constantly UE on Ri, receives service eNB and non-service eNB and unites the merging of transmission and also decode.After the data decode success, UE replys or fail (NACK) replys to the success (ACK) of service eNB feedback HARQ constantly at Ti+4ms.
Second kind of situation: when adopting the dynamic dispatching mode, at above by technical scheme that step 101～step 1032 constituted, in the step 102, service eNB is notified non-service eNB further by the X2 interface scheduling message with the resource of configuration with the corresponding moment of resource.
Wherein, comprise in the X2 interface scheduling message: each resource Ri that disposes in the resource reservation formation and with the corresponding moment Ti of each resource.I is＞=1 integer, and when i=1, R1 represents the initial resource in the resource reservation formation, and T1 represents the corresponding initial time with initial resource R1.
In the step 1032, service eNB and non-service eNB are further received upstream data at Ri first line of a couplet splice grafting constantly simultaneously at Ti+4ms.
Here, before receiving upstream data, Ri first line of a couplet splice grafting also comprises: give UE with the ULGrant transmitting signaling downwards in Ti moment service eNB; Wherein, the resource of UL Grant signaling appointment is Ri.After UE detects UL Grant signaling, on Ri, send upstream data at Ti+4ms moment UE.
Here, also comprise after Ri first line of a couplet splice grafting is received upstream data: non-service eNB is transmitted to service eNB with the upstream data that is received.Service eNB to the upstream data that receives merge decode successfully after, the ACK that feeds back HARQ to UE in the Ti+8ms moment replys or NACK replys.
The third situation: when adopting the SPS mode, at above by technical scheme that step 101～step 1031 constituted, in the step 102, service eNB is notified non-service eNB further by the X2 interface scheduling message with the resource of configuration with the corresponding moment of resource.
Wherein, comprise in the X2 interface scheduling message: each the identical resource R that disposes in the resource reservation formation, with corresponding initial time T1 of initial resource and semi-persistent scheduling cycle (SPS_Period).
In the step 1031, when initial condition, service eNB and non-service eNB are further united simultaneously the transmission downlink data constantly at T1 on R.
In the step 1031, every when reaching a SPS_Period state, service eNB and non-service eNB are united the transmission downlink data simultaneously further at T1+SPS_Period constantly on R.
At above initial condition, before uniting the transmission downlink data on the R, also comprise during initial condition: give UE with DL Assignment transmitting signaling downwards in T1 moment service eNB; Wherein, the resource of DL Assignment signaling appointment is R.
On R, unite during initial condition and also comprise after sending downlink data: after UE detects the DLAssignment signaling, T1 constantly UE on R, receives service eNB and non-service eNB and unites the merging of transmission and also decode.After the data decode success, UE replys or NACK replys to the ACK of service eNB feedback HARQ constantly at T1+4ms.
The 4th kind of situation: when adopting the SPS mode, at above by technical scheme that step 101～step 1032 constituted, in the step 102, service eNB is notified non-service eNB further by the X2 interface scheduling message with the resource of configuration with the corresponding moment of resource.
Wherein, comprise in the X2 interface scheduling message: each the identical resource R that disposes in the resource reservation formation, with corresponding initial time T1 of initial resource and SPS_Period.
In the step 1032, when initial condition, service eNB and non-service eNB are further received upstream data at R first line of a couplet splice grafting constantly simultaneously at T1+4ms.
In the step 1032, every when reaching a SPS_Period state, service eNB and non-service eNB are united the transmission downlink data simultaneously at T1+SPS_Period constantly on R.
At above initial condition, before receiving upstream data, R first line of a couplet splice grafting also comprises during initial condition: give UE with UL Grant transmitting signaling downwards in T1 moment service eNB; Wherein, the resource of UL Grant signaling appointment is R.After UE detected UL Grant signaling, at T1+4ms constantly, UE sent upstream data on R.
Also comprise after R first line of a couplet splice grafting is received upstream data during initial condition: non-service eNB is transmitted to service eNB with the upstream data that is received.Service eNB to the upstream data that receives merge decode successfully after, the ACK that feeds back HARQ to UE in the T1+8ms moment replys or NACK replys.
Be illustrated in figure 2 as Fig. 2 carries out scheduling of resource and data transmission for the application resource reserved queue between eNB schematic diagram, among Fig. 2, the shade of left oblique line is filled expression: the resource location in the reserved resource formation; The shade of right oblique line is filled expression: send the resource location that DL Assignment signaling is adopted on the PDCCH of service eNB; The shade of cross spider is filled expression: send the resource location that downlink data (DL Data) is adopted on the PDSCH of service eNB or non-service eNB; T1～T4 represents respectively and the corresponding moment of each resource location; TTI is 1ms.
In sum, the present invention mainly comprises following content: service eNB is reserved certain downlink resource for the downlink data that may arrive in a period of time in the future, and these resources may be continuous in time, also may distribute at regular intervals.The time interval can be identical, and is promptly periodic; Also can be inequality, promptly acyclic.Physical Resource Block (PRB, the PhysicalResource Block) position of the reserved resource of different time on frequency domain can be identical, also can be different.These reserved resources generally all use identical modulation and coded system (MCS, Modulation and Coding Scheme).These reserved resource pieces on different time have formed a reserved resource formation.
Service eNB sends to non-service eNB with the resource obligate information in these a period of times, notifies non-service eNB to carry out the moment T1 of downlink data transmission first simultaneously.T1 determines by the combination of system frame number SFN and subframe skew n is unique, service eNB will be considered the delay that schedule information and data transmit and the processing delay of non-service eNB on X2 interface when calculate selecting T1, thereby guarantee that service eNB and non-service eNB can both be ready to send downlink data in the T1 moment.
Begin to send the DLAssignment signaling to UE on down control channel PDCCH in T1 moment service eNB, the resource of using with assignment is first Resource Block in the reserved resource formation.Service eNB sends downlink data to UE simultaneously with non-service eNB on identical reserved resource in the corresponding constantly TTI of T1; When next reserved resource piece moment corresponding T2 arrived, service eNB began to send DL Assignment signaling to UE equally on PDCCH, and the resource of using with assignment is second Resource Block in the reserved resource formation.Service eNB sends downlink data to UE simultaneously with non-service eNB on the corresponding constantly identical reserved resource of T2; So continue in the reserved resource formation that all resources have used up or the buffering area formation in do not had new data.Above process as shown in Figure 2.
The time interval in the resource reservation formation between each reserved resource can be 0, and this moment, reserved resource was continuous in time; The time interval can be identical, and this moment, reserved resource was periodic in time.
For reserved resource is the cycle in time, and the MCS of position on frequency domain and use is also identical, and this moment, scheduling was similar to the SPS mode.Service eNB can be that SPS_Period is notified to UE with the configuration information of SPS by the RRC signaling.Like this, service eNB only need be engraved in when T1 and issue DL Assignment signaling on the PDCCH, here DL Assignment signaling uses SPS-RNTI to identify as UE, SPS_Period afterwards can directly send downlink data on the time on the PDSCH fixed resource, UE can be automatically according to SPS_Period downlink data receiving on appointed resource.Equally, service eNB also only needs in the X2 schedule information, is that SPS_Period is notified to the non-service eNB of service with corresponding SPS configuration information, and non-service eNB promptly simultaneously sends downlink data with service eNB according to SPS_Period on appointed resource.
If certain downlink data decoding failure needs to retransmit, service eNB will use dynamic dispatching to distribute new descending re-transmission resource, and re-transmission does not influence service eNB and non-service eNB sends data by the reserved resource formation.Non-service eNB can participate in data retransmission and unite transmission, also can not participate in.When service eNB needs non-service eNB to participate in retransmitting, will send to non-service eNB retransmitting relevant schedule information by X2 interface, both sides finish data retransmission jointly and send on time of agreement and resource.
It is pointed out that above dispatching method is equally applicable to upstream data and sends, except data transmitting time in upstream data sends by the requirement of HARQ sequential than the late 4ms of UL Grant time of reception, all the other processes are identical.
As seen: adopt the present invention, by application resource reserved queue between service eNB and non-service eNB, can reduce effectively and between eNB, frequently transmit resource scheduling information under the CoMP scene, by using the time interval between the bigger reserved resource, can effectively alleviate X2 transmission and relevant treatment time delay simultaneously to striding the difficulty that eNB scheduling and transfer of data are brought.
Method embodiment one: as shown in Figure 3, how the present embodiment explanation uses the present invention is carried out continuous downlink data joint transmission between service eNB and non-service eNB, may further comprise the steps:
Step 101, arrive when service eNB has downlink data, data are buffered.Service eNB reaches the resource that the downlink data that may receive has in the future been reserved 4 TTI for having, and at T1, T2, T3, T4 constantly, corresponding reservation PRB resource may be identical, also may be at diverse location respectively.Service eNB is given non-service eNB by the X2 interface scheduling message with the resource reservation queue notification; The wherein initial moment T1 moment accurately specifies in the mode that System Frame Number (SFN) adds subframe skew (subframe), and all the other T2, T3, T4 can be with reference to specifying with TTI mode at interval with T1.
Here, comprise in the X2 interface scheduling message: UE sign, resource reservation formation, the scheduling that constantly is made of the T1 moment～T4 are constantly.Wherein, the T1 moment, the T2 moment, the T3 moment and T4 correspond respectively to reserved resource 1 in the resource reservation formation, resource 2, resource 3 and resource 4 constantly, and resource 1～resource 4 also can adopt R1～R4 to represent.
Here, comprise in the DL Assignment signaling: resource 1 relevant information.
Here, service eNB and the non-service eNB data that send to UE are represented with DL data1 and DL data2 respectively.
Here, comprise in the DL Assignment signaling: resource 2 relevant informations.
If step 107 reserved resource by all scheduling uses, still has data to be sent in the buffering area, the resource reservation formation that the service eNB structure is new is also notified non-service eNB, and the data of a beginning new round send.
Here, comprise in the X2 interface scheduling message: UE sign, resource reservation formation, the scheduling that constantly is made of the T5 moment～T7 are constantly.Wherein, the T5 moment, the T6 moment and T7 correspond respectively to reserved resource 5 in the resource reservation formation, resource 6 and resource 7 constantly, and resource 5, resource 6 and resource 7 also can adopt R5～R7 to represent.And the initial moment T5 of the new resource reservation formation of structure also accurately specifies in the mode of SFN+subframe constantly, and all the other T6, T7 can be with reference to specifying with TTI mode at interval with T1.
Method embodiment two: as shown in Figure 4, how present embodiment explanation uses the present invention is carried out continuous upstream data and unites reception between service eNB and non-service eNB.
Step 201,, UE needs to send when having upstream data.Service eNB reaches the resource that the upstream data that may send has in the future been reserved 4 TTI for having, and at T1, T2, T3, T4 constantly, corresponding reservation PRB resource may be identical, also may be at diverse location respectively.Service eNB is given non-service eNB by the X2 interface scheduling message with the resource reservation queue notification; Wherein initial moment T1 accurately specifies in the mode of SFN+subframe constantly, and all the other T2, T3, T4 can be with reference to specifying with TTI mode at interval with T1.
Here, comprise in the X2 interface scheduling message: UE sign, resource reservation formation, the scheduling that constantly is made of the T1 moment～T4 are constantly.Wherein, the T1 moment, the T2 moment, the T3 moment and T4 correspond respectively to reserved resource 1 in the resource reservation formation, resource 2, resource 3 and resource 4 constantly, and resource 1～resource 4 also can adopt R1～R4 to represent.
Here, comprise in the UL Grant signaling: resource 1 relevant information.
Here, service eNB and the non-service eNB data that send to UE are represented with UL data1 and UL data2 respectively.
Here, comprise in the UL Grant signaling: resource 2 relevant informations.
If step 208 reserved resource is by all scheduling uses, UE still has upstream data to send request, and the resource reservation formation that the service eNB structure is new is also notified non-service eNB, the data transmission of a beginning new round.
Here, comprise in the X2 interface scheduling message: UE sign, resource reservation formation, the scheduling that constantly is made of the T5 moment～T7 are constantly.Wherein, the T5 moment, the T6 moment and T7 correspond respectively to reserved resource 5 in the resource reservation formation, resource 6 and resource 7 constantly, and resource 5, resource 6 and resource 7 also can adopt R5～R7 to represent.And the initial moment T5 of the new resource reservation formation of structure also accurately specifies in the mode of SFN+subframe constantly, and all the other T6, T7 can be with reference to specifying with TTI mode at interval with T1.
Method embodiment three: as shown in Figure 5, if present embodiment explanation reserved resource has some cycles and uses identical resource and MCS, can use the SPS scheduling mode between service eNB and non-service eNB.
Step 301, arrive when service eNB has downlink data, data are buffered.The resource of service eNB decision reservation period is dispatched in the SPS mode.Service eNB sends scheduling message by X2 interface to non-service eNB, carries following information in scheduling message: the time T 1 of data transmission first, and with SFN+subframe combination expression, interface-free resources information, SPS_Period, UE sign etc.
Here, service eNB and the non-service eNB data that send to UE are represented with DL data1 and DL data2 respectively.
Carry out the system of scheduling of resource between a kind of eNB, this system comprises: dispensing unit, notification unit and transmitting element.Wherein, dispensing unit, be used for the resource allocation reserved queue resource and with the corresponding moment of resource.Notification unit is used for service eNB and notifies non-service eNB with the resource of configuration with the corresponding moment of resource.Transmitting element is used for service eNB and the non-service eNB basis and the corresponding moment of resource, unites the transmission data simultaneously on resource.
Here, adopting under the dynamic dispatching mode state, notification unit is further used for service eNB and notifies non-service eNB by the X2 interface scheduling message; Wherein, comprise in the X2 interface scheduling message: each resource Ri that disposes in the resource reservation formation and with the corresponding moment Ti of each resource; I is＞=1 integer.Transmitting element is further used for service eNB and non-service eNB and unites the transmission downlink data constantly simultaneously at Ti on Ri.
Here, adopting under the SPS mode state, notification unit is further used for eNB and notifies non-service eNB by the X2 interface scheduling message; Wherein, comprise in the X2 interface scheduling message: each the identical resource R that disposes in the resource reservation formation, with corresponding initial time T1 of initial resource and SPS_Period.Transmitting element, when being further used for initial condition, service eNB and non-service eNB are united the transmission downlink data simultaneously constantly at T1 on R; Every when reaching a SPS_Period state, service eNB and non-service eNB are united the transmission downlink data simultaneously at T1+SPS_Period constantly on R.
The another kind of specific implementation of this system is: this system comprises: dispensing unit, notification unit and receiving element.Wherein, dispensing unit, be used for the resource allocation reserved queue resource and with the corresponding moment of resource.Notification unit is used for service eNB and notifies non-service eNB with the resource of configuration with the corresponding moment of resource.Receiving element is used for service eNB and the non-service eNB basis and the corresponding moment of resource, receives data at resource first line of a couplet splice grafting simultaneously.
Here, adopting under the dynamic dispatching mode state, notification unit is further used for service eNB and notifies non-service eNB by the X2 interface scheduling message; Wherein, comprise in the X2 interface scheduling message: each resource Ri that disposes in the resource reservation formation and with the corresponding moment Ti of each resource; I is＞=1 integer.Receiving element is further used for service eNB and non-service eNB and receives upstream data at Ri first line of a couplet splice grafting simultaneously constantly at Ti+4ms.
Here, when adopting under the SPS mode state, notification unit is further used for eNB and notifies non-service eNB by the X2 interface scheduling message; Wherein, comprise in the X2 interface scheduling message: each the identical resource R that disposes in the resource reservation formation, with corresponding initial time T1 of initial resource and SPS_Period.Receiving element, when being further used for initial condition, service eNB and non-service eNB are received upstream data at R first line of a couplet splice grafting constantly simultaneously at T1+4ms; Every when reaching a SPS_Period state, service eNB and non-service eNB are united the transmission downlink data simultaneously at T1+SPS_Period constantly on R.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (12)
1. carry out the method for scheduling of resource between the enhanced base station, it is characterized in that this method comprises:
Resource in the resource allocation reserved queue and with the corresponding moment of resource;
Service enhanced base station (eNB) the described resource that will dispose and notify non-service eNB with the corresponding moment of described resource;
Described service eNB and the described non-service eNB basis and the corresponding moment of described resource, on described resource, unite transmission simultaneously or unite the reception data.
2. method according to claim 1 is characterized in that, when adopting the dynamic dispatching mode, described service eNB is notified described non-service eNB by the X2 interface scheduling message; Wherein, comprise in the described X2 interface scheduling message: each resource Ri that disposes in the described resource reservation formation and with the corresponding moment Ti of each resource; I is the integer more than or equal to 1;
Under downlink data transmission situation, described service eNB and described non-service eNB are united the transmission downlink data simultaneously constantly at Ti on Ri; Perhaps, under the upstream data reception condition, described service eNB and described non-service eNB are received upstream data at Ri first line of a couplet splice grafting constantly simultaneously at Ti+4ms.
3. method according to claim 2 is characterized in that, under downlink data transmission situation, also comprises before uniting the transmission downlink data on the Ri:
Give subscriber equipment (UE) in Ti described service eNB of the moment with downlink resource assignment transmitting signaling downwards; Wherein, the resource of described downlink resource assignment signaling appointment is described Ri;
Also comprise after on Ri, uniting the transmission downlink data:
After described UE detects described downlink resource assignment signaling, Ti constantly UE on described Ri, receives service eNB and non-service eNB and unites the merging of transmission and decode;
After the data decode success, UE replys to successful respond or the failure of the automatic request retransmission HARQ of service eNB feedback mixing constantly at Ti+4ms.
4. method according to claim 2 is characterized in that, under the upstream data reception condition, also comprises before Ri first line of a couplet splice grafting is received upstream data:
Permit transmitting signaling downwards to give UE uplink in Ti described service eNB of the moment; Wherein, the resource of described uplink permission signaling appointment is described Ri;
UE sends upstream data at Ti+4ms moment UE after detecting described uplink permission signaling on described Ri;
After receiving upstream data, Ri first line of a couplet splice grafting also comprises:
Non-service eNB is transmitted to service eNB with the upstream data that is received; Service eNB is replied to successful respond or the failure of UE feedback HARQ constantly at Ti+8ms after decoding successfully to the upstream data merging that receives.
5. method according to claim 1 is characterized in that, when adopting semi-persistent scheduling (SPS) mode, described eNB notifies described non-service eNB by the X2 interface scheduling message; Wherein, comprise in the described X2 interface scheduling message: each the identical resource R that disposes in the described resource reservation formation, with corresponding initial time T1 of initial resource and semi-persistent scheduling cycle SPS_Period;
Under downlink data transmission situation, during initial condition, described service eNB and described non-service eNB are united the transmission downlink data simultaneously constantly at T1 on described R; Every when reaching a SPS_Period state, described service eNB and described non-service eNB are united the transmission downlink data simultaneously at T1+SPS_Period constantly on described R;
Perhaps, under the upstream data reception condition, during initial condition, described service eNB and described non-service eNB are received upstream data at described R first line of a couplet splice grafting constantly simultaneously at T1+4ms; Every when reaching a SPS_Period state, described service eNB and described non-service eNB are united the transmission downlink data simultaneously at T1+SPS_Period constantly on described R.
6. method according to claim 5 is characterized in that, under downlink data transmission situation, during initial condition, also comprises before uniting the transmission downlink data on the R:
Give UE in T1 described service eNB of the moment with downlink resource assignment transmitting signaling downwards; Wherein, the resource of described downlink resource assignment signaling appointment is described R;
Also comprise after on R, uniting the transmission downlink data:
After described UE detects described downlink resource assignment signaling, T1 constantly UE on described R, receives service eNB and non-service eNB and unites the merging of transmission and decode;
After the data decode success, UE replys to successful respond or the failure of service eNB feedback HARQ constantly at T1+4ms.
7. method according to claim 5 is characterized in that, under the upstream data reception condition, during initial condition, also comprises before R first line of a couplet splice grafting is received upstream data:
Permit transmitting signaling downwards to give UE uplink in T1 described service eNB of the moment; Wherein, the resource of described uplink permission signaling appointment is described R;
After UE detected described uplink permission signaling, at T1+4ms constantly, UE sent upstream data on described R;
After receiving upstream data, R first line of a couplet splice grafting also comprises:
Non-service eNB is transmitted to service eNB with the upstream data that is received; Service eNB is replied to successful respond or the failure of UE feedback HARQ constantly at T1+8ms after decoding successfully to the upstream data merging that receives.
8. carry out the system of scheduling of resource between the enhanced base station, it is characterized in that this system comprises: dispensing unit, notification unit and transmitting element/receiving element; Wherein,
Dispensing unit, be used for the resource allocation reserved queue resource and with the corresponding moment of resource;
Notification unit is used for described resource that service eNB will dispose and notifies non-service eNB with the corresponding moment of described resource;
Transmitting element is used for described service eNB and the described non-service eNB basis and the corresponding moment of described resource, unites the transmission data simultaneously on described resource; Perhaps, receiving element is used for described service eNB and the described non-service eNB basis and the corresponding moment of described resource, receives data at described resource first line of a couplet splice grafting simultaneously.
9. system according to claim 8 is characterized in that, described notification unit is further used for adopting under the dynamic dispatching mode state, and described service eNB is notified described non-service eNB by the X2 interface scheduling message; Wherein, comprise in the described X2 interface scheduling message: each resource Ri that disposes in the described resource reservation formation and with the corresponding moment Ti of each resource; I is the integer more than or equal to 1;
Described transmitting element is further used for described service eNB and described non-service eNB and unites the transmission downlink data constantly simultaneously at Ti on Ri.
10. system according to claim 8 is characterized in that, described notification unit is further used for adopting under the dynamic dispatching mode state, and described service eNB is notified described non-service eNB by the X2 interface scheduling message; Wherein, comprise in the described X2 interface scheduling message: each resource Ri that disposes in the described resource reservation formation and with the corresponding moment Ti of each resource; I is the integer more than or equal to 1;
Receiving element is further used for described service eNB and described non-service eNB and receives upstream data at Ri first line of a couplet splice grafting simultaneously constantly at Ti+4ms.
11. system according to claim 8 is characterized in that, described notification unit is further used for adopting under the SPS mode state, and described eNB notifies described non-service eNB by the X2 interface scheduling message; Wherein, comprise in the described X2 interface scheduling message: each the identical resource R that disposes in the described resource reservation formation, with corresponding initial time T1 of initial resource and SPS_Period;
Described transmitting element, when being further used for initial condition, described service eNB and described non-service eNB are united the transmission downlink data simultaneously constantly at T1 on described R; Every when reaching a SPS_Period state, described service eNB and described non-service eNB are united the transmission downlink data simultaneously at T1+SPS_Period constantly on described Ri.
12. system according to claim 8 is characterized in that, described notification unit is further used for adopting under the SPS mode state, and described eNB notifies described non-service eNB by the X2 interface scheduling message; Wherein, comprise in the described X2 interface scheduling message: each the identical resource R that disposes in the described resource reservation formation, with corresponding initial time T1 of initial resource and SPS_Period;
Described receiving element, when being further used for initial condition, described service eNB and described non-service eNB are received upstream data at described R first line of a couplet splice grafting constantly simultaneously at T1+4ms; Every when reaching a SPS_Period state, described service eNB and described non-service eNB are united the transmission downlink data simultaneously at T1+SPS_Period constantly on described Ri.
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