CN101877908B - Base stations and method for synchronously scheduling resources among same - Google Patents
Base stations and method for synchronously scheduling resources among same Download PDFInfo
- Publication number
- CN101877908B CN101877908B CN200910137956.5A CN200910137956A CN101877908B CN 101877908 B CN101877908 B CN 101877908B CN 200910137956 A CN200910137956 A CN 200910137956A CN 101877908 B CN101877908 B CN 101877908B
- Authority
- CN
- China
- Prior art keywords
- sub
- frame number
- scheduling
- system frame
- subframe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses base stations and a method for synchronously scheduling resources among the same. The method comprises the following steps of: calculating the subframe offset Y' and a system frame number N' in the total number range of subframes capable of being positioned in a wireless frame according to a system frame number N of a service base station or a non-service station and the delay summation Tdelay and the protective time T protection summation of X and X2 interfaces at finishing moment of a construction resource scheduling instruction after the service base station finishing constructing an uplink resource scheduling instruction; adjusting the subframe offset Y' and the system frame number N' according to a preset subframe for resource scheduling to obtain a system frame number N'' and a subframe offset Y''; and transmitting a resource scheduling message carrying the system frame number N'' and the subframe offset Y'' to the non-service base station for participating in combined multipoint processing by using the service base station through the X2 interface. The invention ensures that all the base stations participating in the synergism to synchronously transmit and receive data.
Description
Technical field
The present invention relates to the scheduling of resource technology of base station in wireless communication field, particularly relate to the method for synchronously scheduling resources between base station under associating Multipoint process (CoMP, Coordinated Multiple Point) scene and corresponding 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 transmitted by uplink/downlink shared channel.Each subscriber equipment (UE, User Equipment) is given by base station (eNB, evo1ved NodeB) Resources allocation.The access technology that E-UTRAN adopts, OFDM (OFDM, Orthogonal Frequency Division Multiplexing) technology, the RRM of E-UTRAN system is compared with second generation mobile communication system, there is the feature of large bandwidth, many time courses, its Radio Resource occurs with time and frequency bidimensional, and the number of users that can carry increases greatly.
For the user equipment (UE) (i.e. terminal) being positioned at eNB covering edge, may receive the wireless signal from neighbouring several adjacent eNB, its wireless signal launched also can be received by neighbouring multiple eNB simultaneously.In this case, multiple eNB can be coordinated carry out combining of up-downgoing data receiving and sending, the associating Multipoint process CoMP technology alleged by Here it is to this UE simultaneously.Utilize CoMP and relevant signal processing technology, the gain of data diversity and spatial reuse can be played uplink and downlink wireless signal, improve reliability and the data throughout of Wireless Data Transmission.
Multiple neighbor cells of CoMP participating cooperation may belong to same eNB and control, and also may belong to different eNB (Inter eNB) and control.When CoMP cooperation occurs in the scene of different eNB participations, Physical Downlink Control Channel (the PDCCH of a UE only eNB wherein, Physical Downlink Control Channel) instruction of upper reception scheduling downlink resource, also only mixed spin system (HARQ, Hybrid Automatic Repeat reQuest) feedback information and other measurement report information are uploaded to same eNB.This eNB is called service eNB (Serving eNB), and other eNB is called non-serving eNB (Non-Serving eNB), or is called cooperation eNB (Collaborative Enb).
Under the scene that multiple eNB CoMP participating is collaborative, for reaching the object that multiple eNB uplink and downlink data aggregate sends, receives, Serving eNB needs scheduling of resource instruction to send to Non-Serving eNB by X2 interface between eNB, thus make Non-Serving eNB on identical time and frequency resource, data can be sent to UE with Serving eNB, or receive data from UE, that is Non-Serving eNB and Serving eNB synchronously send/receive data to/from UE.
As shown in Figure 1, have two eNB, one is service eNB, and another is non-serving eNB.Two eNB carry out data aggregate transmission and reception to being positioned at its user equipment (UE) covering edge together.But only have service eNB to control all scheduling of resource instructions, non-serving eNB participates in associated treatment according to the scheduling of service eNB passively.
Dynamic resource scheduling according to LTE system specifies, eNB is asynchronous system to the scheduling downlink resource of UE, namely the data transmission TTI moment that descending HARQ process number is corresponding with it does not have fixed correspondence, eNB is the TTI moment that descending HARQ process selection sends data, and give row dispatch command (DL Assignment up and down by being engraved in PDCCH channel when TTI, Downlink Assignment) notify that UE receives, need to carry corresponding HARQ process number in DL Assignment.UE receives descending scheduling instruction and downlink data receiving (DL Data, Downlink Data) transmits at same Transmission Time Interval (TTI, Transport Time Interval).ENB is the method for synchronization to the ascending resource scheduling of UE, and it is fixed correspondence that the data that namely HARQ process number is corresponding with it send the TTI moment.To UE, upstream data license (Uplink Grant) is sent in its fixing corresponding TTI moment to certain ascending HARQ course eNB, does not need to carry ascending HARQ course number in upstream data license.That TTI after 3 TTI of UE after receiving upstream data license, sends upstream data to eNB.
Under the CoMP scene of Inter eNB, due to the transmission delay of X2 interface, Non-Serving eNB receives resource scheduling information from Serving eNB and has the delayed of certain hour.Before Non-Serving eNB receives resource scheduling information and carries out data transmission, reception preparation, Serving eNB can not to UE down distributing resource dispatch command on its PDCCH control channel, and therefore Serving eNB needed according to the time of the corresponding postponement of X2 transmission delay to UE down distributing resource dispatch command.But because X2 transmission delay is not accurate and invariable, therefore still cannot ensure that Serving eNB and Non-Serving eNB combines the upstream data of reception UE in the same TTI moment simultaneously or sends downlink data to UE.
As shown in Figure 2.In Fig. 2, each grid represents a TTI width (1ms) in sequential.When service eNB is ready for scheduling of resource, consider to non-serving eNB and send the delayed of schedule information, service eNB just sends resource descending scheduling instruction (DL Assignment) by after delay a period of time on its PDCCH channel, sends downlink data (DL Data) on PDSCH channel simultaneously.But the delay due to the actual generation of X2 interface may be greater than or less than the delay that service eNB is estimated, causes non-serving eNB to send downlink data in the different TTI moment, thus the failure causing associating data to send, both waste resource, too increase interference.
Summary of the invention
Technical problem to be solved by this invention is to provide the method for synchronously scheduling resources between a kind of base station and corresponding base station, can make multiple eNB accurately at the upstream data of same reception UE or to UE transmission downlink data.
In order to solve the problems of the technologies described above, the invention provides the method for synchronously scheduling resources between a kind of base station, comprising:
When after the instruction of serving BS structure scheduling of resource, calculate and represent the unified System Frame Number N " and sub-frame offset Y " sending the scheduling of resource instruction moment in the base station of all participation associating Multipoint process; That is:
According to serving BS or the current System Frame Number N of non-serving base stations, and according to the delay summation T completing moment X, X2 interface of structure scheduling of resource instruction
delayand guard time T
protectionsum, calculates and can be in sub-frame offset Y ' in the sum of subframe in radio frames scope and System Frame Number N ', and adjusted by sub-frame offset Y ' and System Frame Number N ' according to the predetermined subframe of scheduling of resource, try to achieve System Frame Number N " and sub-frame offset Y ";
Serving BS sends to the non-serving base stations participating in associating Multipoint process the scheduling of resource message carrying System Frame Number N " and sub-frame offset Y " by X2 interface.
Further, the method also comprises:
All base stations all in the time tranfer interval T TI moment that System Frame Number N " and sub-frame offset Y " determines, send scheduling of resource instruction to user equipment (UE).
Further, serving BS or the current System Frame Number N of non-serving base stations refer to:
If serving BS and the current System Frame Number of non-serving base stations and frame boundaries synchronously align, then get the System Frame Number of any one base station as current System Frame Number N;
If the System Frame Number of serving BS and described non-serving base stations border that is inconsistent and/or System Frame Number does not line up, then serving BS and non-serving base stations are carried out the synchronous adjustment of System Frame Number, or to be as the criterion with the System Frame Number of the base station after comparatively and sub-frame offset at computational resource scheduling instance and to adjust, using the System Frame Number after adjustment as current System Frame Number N.
Further, serving BS calculates and can be in sub-frame offset Y ' in the sum of subframe in radio frames scope and System Frame Number N ', specifically comprises:
According to the delay summation T completing moment X, X2 interface of structure scheduling of resource instruction
delayand guard time T
protectionsum, calculates sub-frame offset Y, that is:
Y＝X+T
delay+T
protection；
Wherein, X, T
delay, T
protectionand Y is all in units of TTI;
If the sub-frame offset Y calculated is less than subframe sum in radio frames, namely Y is in radio frames within the scope of subframe, then current System Frame Number N is namely as the transmission of actual data or the System Frame Number N ' of the time of reception, the Y calculated and sub-frame offset value Y ';
If calculate sub-frame offset to be more than or equal in radio frames subframe sum, namely Y exceeds subframe scope in radio frames, then using N+1 as System Frame Number N ', using Y to number of sub frames delivery in radio frames as sub-frame offset value Y '; That is:
N′＝N+1；Y′＝Y mod10。
Further, sub-frame offset Y ' and System Frame Number N ' adjusts in the predetermined subframe of ascending resource scheduling by serving BS, tries to achieve System Frame Number N " and sub-frame offset Y ", specifically comprises:
When the described sub-frame offset Y ' calculated conforms to the predetermined subframe of ascending resource scheduling, then using N ', Y ' directly as System Frame Number N " and sub-frame offset Y "; When the sub-frame offset Y ' calculated is not inconsistent with the predetermined subframe of ascending resource scheduling, then System Frame Number N ' is adjusted to N '+1 and tries to achieve System Frame Number N ", and predetermined subframe Y ' being adjusted to described ascending resource scheduling tries to achieve sub-frame offset Y ";
All base stations, all in the TTI moment that System Frame Number N " and sub-frame offset Y " determines, send ascending resource scheduling instruction to user equipment (UE) or receive upstream data from UE.
Further, serving BS, by sub-frame offset Y ' and System Frame Number N " the unified subframe Y adjusted in multiple descending predetermined subframe ", is tried to achieve System Frame Number N " and sub-frame offset Y ", is specifically comprised:
When the described sub-frame offset Y ' calculated is less than last subframe in descending predetermined subframe, by sub-frame offset Y ', of adjusting in described descending predetermined subframe is greater than Y ' and subframe immediate with Y ', try to achieve sub-frame offset Y ", and using N ' as System Frame Number N "; When being more than or equal to last subframe in descending predetermined subframe as the sub-frame offset Y ' calculated, sub-frame offset Y ' being adjusted in descending predetermined subframe in first subframe, tries to achieve sub-frame offset Y ", and using N '+1 as System Frame Number N ";
All base stations all in the TTI moment that System Frame Number N " and sub-frame offset Y " determines, send scheduling downlink resource instruction to user equipment (UE).
In order to solve the problems of the technologies described above, the invention provides a kind of serving BS carrying out isochronous resources scheduling, comprising: scheduling of resource instruction constructing module, scheduling instance computing module and message transmission/reception module; Wherein:
Scheduling of resource instruction constructing module, is connected with scheduling instance computing module and message transmission/reception module respectively, for after the instruction of structure scheduling of resource, the moment X completing the instruction of structure scheduling of resource is exported to scheduling instance computing module; Return at scheduling instance computing module and represent the unified System Frame Number N " and sub-frame offset Y " sending the scheduling of resource instruction moment in the base station of all participation associating Multipoint process, System Frame Number N " and sub-frame offset Y " is exported to message transmission/reception module;
Scheduling instance computing module, for according to serving BS or the current System Frame Number N of non-serving base stations, and according to the described X of input, the delay summation T of X2 interface
delayand guard time T
protectionsum, calculate and can be in sub-frame offset Y ' within the scope of the subframe of radio frames and System Frame Number N ', and according to the predetermined subframe of scheduling of resource, sub-frame offset Y ' and System Frame Number N ' is adjusted, try to achieve System Frame Number N " and sub-frame offset Y ", the N tried to achieve " and Y " is returned to scheduling of resource instruction constructing module;
Message transmission/reception module, for inserting in scheduling of resource message by the System Frame Number N " and sub-frame offset Y " of input, will send to the non-serving base stations of all participation associating Multipoint process by X2 interface in this scheduling of resource message.
Further, serving BS or the current System Frame Number N of non-serving base stations refer to:
If serving BS and the current System Frame Number of non-serving base stations and frame boundaries synchronously align, then get the System Frame Number of any one base station as current System Frame Number N;
If the System Frame Number of serving BS and non-serving base stations border that is inconsistent and/or System Frame Number does not line up, then serving BS and non-serving base stations are carried out the synchronous adjustment of System Frame Number, or to be as the criterion with the System Frame Number of the base station after comparatively and sub-frame offset at computational resource scheduling instance and to adjust, using the System Frame Number after adjustment as current System Frame Number N.
Further,
Scheduling instance computing module, calculates the sub-frame offset Y ' that can be in radio frames in subframe sum scope and refers to System Frame Number N ': according to the delay summation T completing moment X, X2 interface of structure scheduling of resource instruction
delayand guard time T
protectionsum, calculates sub-frame offset Y, that is:
Y＝X+T
delay+T
protection；
Wherein, X, T
delay, T
protectionand Y is all in units of TTI;
If the sub-frame offset Y calculated to be less than in radio frames subframe sum, namely Y is in radio frames within the scope of subframe, then current System Frame Number N namely as System Frame Number N ', the Y calculated and sub-frame offset value Y ';
If the sub-frame offset calculated to be more than or equal in radio frames subframe sum, namely Y exceeds subframe scope in radio frames, then using N+1 as System Frame Number N ', using Y to number of sub frames delivery in radio frames as sub-frame offset value Y '; That is:
N′＝N+1；Y′＝Y mod10。
Further,
Scheduling instance computing module, adjusts in the predetermined subframe of ascending resource scheduling by sub-frame offset Y ' and System Frame Number N ', tries to achieve described System Frame Number N " and sub-frame offset Y ", that is:
When the sub-frame offset Y ' calculated conforms to the predetermined subframe of described ascending resource scheduling, then using N ', Y ' directly as System Frame Number N " and sub-frame offset Y "; When the sub-frame offset Y ' calculated is not inconsistent with the predetermined subframe of ascending resource scheduling, then System Frame Number N ' is adjusted to N '+1 and tries to achieve System Frame Number N ", and predetermined subframe Y ' being adjusted to ascending resource scheduling tries to achieve sub-frame offset Y ".
Further,
Scheduling instance computing module, by sub-frame offset Y ' and System Frame Number N " the unified subframe Y adjusted in multiple descending predetermined subframe ", tries to achieve described System Frame Number N " and described sub-frame offset Y ", that is:
When being less than last subframe in descending predetermined subframe as the sub-frame offset Y ' calculated, one of being adjusted to by sub-frame offset Y ' in descending predetermined subframe is greater than Y ' and subframe immediate with described Y ', try to achieve sub-frame offset Y ", and using N ' as System Frame Number N "; When being more than or equal to last subframe in descending predetermined subframe as the sub-frame offset Y ' calculated, sub-frame offset Y ' being adjusted in descending predetermined subframe in first subframe, tries to achieve sub-frame offset Y ", and using N '+1 as System Frame Number N ".
In order to solve the problems of the technologies described above, the invention provides a kind of non-serving base stations carrying out isochronous resources scheduling, comprising: comprise interconnective message transmission/reception module and scheduling of resource moment parsing module; Wherein:
Message transmission/reception module, for exporting to scheduling of resource moment parsing module by the scheduling of resource message from serving BS received by X2 interface; After receiving the System Frame Number N " and sub-frame offset Y " that scheduling of resource moment parsing module returns, when System Frame Number N " and sub-frame offset Y " determines, send upstream or downstream dispatch command to UE, or receive upstream data from UE;
Scheduling of resource moment parsing module, for returning to message transmission/reception module by the System Frame Number N " and sub-frame offset Y " in the expression scheduling of resource moment parsed in the scheduling of resource message from input.
Between the base station that the present invention proposes, the method for synchronously scheduling resources and corresponding base station, can solve the stationary problem carrying out collaborative scheduling of resource existence between multiple eNB well.Scheme has taken into full account the impact that interface transmission and processing delay are brought cooperative scheduling, simultaneously for the instability of this delay, eliminated by the method being adjusted to specific T TI the scheduling of resource moment, thus be ensure that the eNB that all participations are worked in coordination with can transmit and receive data at identical timing synchronization.
Accompanying drawing explanation
Fig. 1 is the schematic network structure utilizing CoMP technology to carry out multiple eNB Combined Treatment;
Fig. 2 is the stationary problem schematic diagram existed in the scheduling of resource between eNB;
Fig. 3 is the method flow diagram of synchronously scheduling resources between base station of the present invention;
Fig. 4 is the key diagram of the embodiment of the method 1 of synchronously scheduling resources between base station of the present invention;
Fig. 5 is the key diagram of the embodiment of the method 2 of synchronously scheduling resources between base station of the present invention;
Fig. 6 is the key diagram of the embodiment of the method 3 of synchronously scheduling resources between base station of the present invention;
Fig. 7 is the key diagram of the embodiment of the method 4 of synchronously scheduling resources between base station of the present invention;
Fig. 8 is the structured flowchart carrying out the serving base station embodiment of isochronous resources scheduling of the present invention;
Fig. 9 is the structured flowchart carrying out the non-serving base stations embodiment of isochronous resources scheduling of the present invention.
Embodiment
The method of synchronously scheduling resources between base station provided by the invention, its inventive concept is: when after the instruction of service eNB structure scheduling of resource, calculate represent all eNB combine the System Frame Number N " and sub-frame offset Y " sending or receive the data moment combination array (N ", Y "); That is:
According to service eNB or the current System Frame Number N of non-serving eNB, and according to getting out the moment X of resource scheduling information, the delay summation T of X2 interface
delayand guard time T
protectionsum, calculates and can be in sub-frame offset Y ' and System Frame Number N ' in the total scope of subframe in radio frames; Meanwhile, be eliminate the instability that X2 interface postpones, a specific subframe Y in several specific subframe adjusted in sub-frame offset Y ' unification " on, and adjustment System frame number N ' as required, try to achieve combine array (N ", Y ").
Service eNB sends scheduling of resource message by X2 interface to the non-serving eNB participating in associating data processing, within the message with (N ", all eNB of Y ") explication combines the TTI moment sending data or reception data; All eNB (N ", the TTI moment that Y ") specifies, to UE send downlink data or from UE receive upstream data.
Launch in detail to describe to above-mentioned design of the present invention below in conjunction with accompanying drawing and preferred embodiment, thus clear, intactly state out technical scheme of the present invention.
The method of synchronously scheduling resources between base station of the present invention, as shown in Figure 3, comprises the steps:
310,320: when after the instruction of service eNB structure scheduling of resource, calculate sub-frame offset (Sub-frame offset) Y, that is:
Y＝X+T
delay+T
protection (1)
In formula:
X is the moment that service eNB has got out resource scheduling information, represents with TTI subframe numbers;
T
delayfor the delay summation of X2 interface, in units of TTI; T
delayobtain by carrying out measurement between eNB;
T
protectionfor guard time, in units of TTI; T
protectionset by webmaster according to actual needs.
330、340：
If the Y tried to achieve is less than subframe sum 10 in radio frames, namely sub-frame offset Y to be in radio frames within the scope of subframe, then service eNB or the current System Frame Number (SFN of non-serving eNB, System Frame Number) N is namely as the transmission of actual data or the System Frame Number N ' of the time of reception, and namely the Y tried to achieve calculates sub-frame offset value Y '; That is:
N′＝N；Y′＝Y； (2)
If the Y tried to achieve is more than or equal to subframe sum 10 in radio frames, namely sub-frame offset Y exceeds subframe scope in radio frames, then (N+1) is as the transmission of actual data or the System Frame Number N ' of the time of reception, and namely the Y tried to achieve calculates sub-frame offset value Y ' to the result of number of sub frames delivery in radio frames; That is:
N′＝N+1；Y′＝Y mod10； (3)
If service eNB or the current System Frame Number of non-serving eNB and frame boundaries synchronously align, then only need in service eNB or the current System Frame Number of non-serving eNB.Otherwise, namely the frame number of service eNB and non-serving eNB border that is inconsistent and/or system-frame does not line up yet, then need service eNB before CoMP data send, carry out the synchronous adjustment of System Frame Number with non-serving eNB, or service eNB considers that when computational resource scheduling instance the frame number difference between eNB initiatively adjusts, that is with eNB comparatively after System Frame Number and sub-frame offset be as the criterion and adjust.
350: by unified for calculating sub-frame offset value Y ' in a specific subframe in several specific subframe, and adjust N ' as required, try to achieve combination array (N ", Y ");
In order to eliminate the instability that X2 interface postpones, by sub-frame offset Y ' unification in the predetermined subframe of in several predetermined subframe, that is all eNB only carry out collaborative scheduling of resource in certain several specific subframe.The mobility scale that the quantity of predetermined subframe and subframe numbers can postpone according to X2 interface and systematic function consider, and are that example illustrates here with the specific subframe of y1, y2, y3:
If y2 > Y ' >=y1, then Y "=y2; (4)
If y3 > Y ' >=y2, then Y "=y3; (5)
If Y ' >=y3, then Y "=y1; And N "=N '+1; (6)
The combination array finally obtained for (N ", Y ") namely represents that actual data send or the System Frame Number N of the time of reception " and sub-frame offset Y ".
360: service eNB sends scheduling of resource message by X2 interface to the non-serving eNB participating in associating data processing, within the message with combine array (N ", Y "), all eNB of explication combines the TTI moment of transmission data or reception data;
370: all eNB (N ", Y ") combines TTI moment of specify of array, sends downlink data or from UE reception upstream data to UE.
The method of scheduling downlink resource is synchronously carried out between embodiment 1:eNB
As shown in Figure 4, in figure, each grid represents a TTI width (1ms) in sequential.Each radio frames (10ms) comprises 10 subframes (1ms), and label is 0 ~ 9 respectively.System Frame Number and the frame boundaries of service eNB and non-serving eNB synchronously align.Suppose that service eNB has been restricted to only at Isosorbide-5-Nitrae, 7 three predetermined subframe send descending scheduling signaling.
Service eNB is N at System Frame Number, in frame sub-frame offset be 3 moment be ready for scheduling downlink resource, 6 TTI should be postponed according to delay parameter and guardtime calculation of parameter, namely send descending scheduling the 9th subframe.
But because subframe 9 does not belong to Isosorbide-5-Nitrae, 7 three predetermined subframe, so increase the 1st subframe being deferred to next system-frame to send descending scheduling instruction, namely send descending scheduling instruction in (N+1, the 1) moment.
Scheduling instance will be informed non-serving eNB with the number of combinations prescription formula of (N+1,1) by service eNB in X2 interface message, thus all eNB can carry out downlink data transmission mutually in the same time.
If there is multiple non-serving eNB, and delay between service eNB and these non-serving eNB is different, then calculate by above principle respectively, and service eNB is dispatched by the maximum result of delay.
The method of ascending resource scheduling is synchronously carried out between embodiment 2:eNB
As shown in Figure 5.In figure, each grid represents a TTI width (1ms) in sequential.Each radio frames (10ms) comprises 10 subframes (1ms), and label is 0 ~ 9 respectively.System Frame Number and the frame boundaries of service eNB and non-serving eNB synchronously align.Distinguish to some extent with descending scheduling, because uplink scheduling is the method for synchronization, for specific up mixed spin system HARQ process, its scheduling is all carried out at specific TTI, does not therefore need as descending scheduling, specify several specific TTI.
Service eNB is N at System Frame Number, in frame sub-frame offset be 3 moment be ready to, for ascending HARQ course carries out ascending resource scheduling, 6 TTI should be postponed according to delay parameter and guardtime calculation of parameter, namely send uplink scheduling the 9th subframe.
But due to the scheduling of ascending HARQ course can not be carried out in subframe 9, next moment i.e. System Frame Number N+1 must be waited until, sub-frame offset be 2 moment issue UL Grant again, namely issue UL Grant in (N+1, the 2) moment.
Scheduling instance will be informed non-serving eNB with the number of combinations prescription formula of (N+1,2) by service eNB in X2 interface message, thus all eNB can carry out upstream data reception mutually in the same time.
The method of semipermanent scheduling of resource (SPS, Semi-Persistent Scheduling) is synchronously carried out between embodiment 3:eNB
As shown in Figure 6.In figure, each grid represents a TTI width (1ms) in sequential.Each radio frames (10ms) comprises 10 subframes (1ms), and label is 0 ~ 9 respectively.System Frame Number and the frame boundaries of service eNB and non-serving eNB synchronously align.SPS is dispatched, because service eNB no longer transmits scheduling of resource instruction to non-serving eNB within a certain period of time, all eNB carry out data transmission automatically according to the SPS cycle, so the synchronous alignment of dispatching first is particularly important, therefore can to postpone a period of times with what ensure eNB between synchronous backward for dispatch command more as one sees fit in SPS situation.Suppose that service eNB has been restricted to only at Isosorbide-5-Nitrae, 7 three predetermined subframe send descending scheduling signaling.
Service eNB is N at System Frame Number, in frame sub-frame offset be 3 moment be ready for scheduling downlink resource, 6 TTI should be postponed according to delay parameter and guardtime calculation of parameter, namely send descending scheduling the 9th subframe.
But because subframe 9 does not belong to Isosorbide-5-Nitrae, 7 three predetermined subframe, so increase the 4th subframe being deferred to next system-frame to send descending scheduling instruction, namely send descending scheduling instruction in (N+1, the 4) moment.
Scheduling instance will be informed non-serving eNB with the compound mode of (N+1,4) by service eNB in X2 interface message, thus all eNB can carry out downlink data transmission mutually in the same time.
Embodiment 4: the System Frame Number between service eNB and non-serving eNB and subframe number the method for synchronously scheduling resources between eNB when there are differences
If the frame number of service eNB and non-serving eNB is inconsistent, and the border of system-frame does not line up yet.Service eNB carried out the synchronous of System Frame Number with non-serving eNB before CoMP data send, or service eNB considers that when computational resource scheduling instance the frame number difference between eNB initiatively adjusts, as shown in Figure 7.
Non-serving eNB frame number differs as n with service eNB frame number, and subframe numbers difference is 2.Service eNB is N at System Frame Number, in frame sub-frame offset be 3 moment be ready for scheduling downlink resource, calculate by preceding method and should postpone till TTI moment of (N+1,1).Consider the frame number difference between eNB, scheduling instance will be informed non-serving eNB with the number of combinations prescription formula of (N+n+1,3) by service eNB in X2 interface message, thus all eNB can carry out downlink data transmission mutually in the same time.
As shown in Figure 8, be the structured flowchart carrying out the serving base station embodiment of isochronous resources scheduling of the present invention, this serving BS 800 comprises: scheduling of resource instruction constructing module 810, scheduling instance computing module 820 and message transmission/reception module 830; Wherein:
Scheduling of resource instruction constructing module 810, be connected with scheduling instance computing module 820 and message transmission/reception module 830 respectively, for after structure scheduling of resource instruction, by be ready to resource scheduling information moment its TTI subframe numbers X, export to scheduling instance computing module 820; And scheduling instance computing module 820 return represent the scheduling of resource moment combination array (N ", time Y "), will (N ", Y ") be inserted in will to send scheduling of resource message in, export to message transmission/reception module 830;
Scheduling instance computing module 820, for according to service eNB or the current System Frame Number N of non-serving eNB, and according to the delay summation T of TTI subframe numbers X, X2 interface
delayand guard time T
protectionsum, calculates and can be in sub-frame offset Y ' within the scope of the subframe of radio frames and System Frame Number N '; Meanwhile, sub-frame offset Y ' unification is adjusted to a specific subframe Y in several specific subframe " on, and adjustment System frame number N ' as required; try to achieve combination array (N ", Y "), and should (N ", Y ") returns to scheduling of resource instruction constructing module 810;
Message transmission/reception module 830, for sending to the non-serving eNB of all participation associating data processings by X2 interface by the scheduling of resource message of input.
Certainly, the scheduling of resource instruction constructing module 810 in this embodiment and scheduling instance computing module 820 can be combined into a module, or scheduling instance computing module 820 is contained in scheduling of resource instruction constructing module 810.
As shown in Figure 9, be the structured flowchart carrying out the non-serving base stations embodiment of isochronous resources scheduling of the present invention, this non-serving base stations 900 comprises interconnective message transmission/reception module 910 and scheduling of resource moment parsing module 920; Wherein:
Message transmission/reception module 910, for by received by X2 interface from service eNB scheduling of resource message, export to scheduling of resource moment parsing module 920; (, send downlink data to UE, or receive upstream data from UE when N ", after Y "), be N ' and skew subframe is Y at System Frame Number " what receive that scheduling of resource moment parsing module 920 returns;
Scheduling of resource moment parsing module 920, for from input scheduling of resource message in parse represent the scheduling of resource moment combination array (N ", Y "), and by resolve (N ", Y ") returns to message transmission/reception module 910.
Certainly, the message transmission/reception module 910 in this embodiment and scheduling of resource moment parsing module 920 also can be combined into a module, or scheduling of resource moment parsing module 920 is contained in message transmission/reception module 910.
In sum, the method for synchronously scheduling resources between base station of the present invention and corresponding base station can be found out, solve the stationary problem carrying out collaborative scheduling of resource existence between multiple eNB well.Take into full account the impact that interface transmission and processing delay are brought cooperative scheduling on the one hand, on the other hand for the instability of this delay, eliminated by the scheduling of resource moment is adjusted to specific T TI, thus be ensure that the eNB that all participations are worked in coordination with can transmit and receive data at identical timing synchronization.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.The present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection range that all should belong to the claim appended by the present invention.
Claims (12)
1. the method for synchronously scheduling resources between base station, comprising:
When after the instruction of serving BS structure scheduling of resource, calculate and represent the unified System Frame Number N " and sub-frame offset Y " sending the scheduling of resource instruction moment in the base station of all participation associating Multipoint process; That is:
According to serving BS or the current System Frame Number N of non-serving base stations, and according to the delay summation T completing moment X, X2 interface of described structure scheduling of resource instruction
delayand guard time T
protectionsum, calculate and can be in sub-frame offset Y ' in the sum of subframe in radio frames scope and System Frame Number N ', and according to the predetermined subframe of scheduling of resource, described sub-frame offset Y ' and System Frame Number N ' is adjusted, try to achieve described System Frame Number N " and sub-frame offset Y ";
Described serving BS sends to the non-serving base stations participating in associating Multipoint process the scheduling of resource message carrying described System Frame Number N " and sub-frame offset Y " by described X2 interface.
2. in accordance with the method for claim 1, it is characterized in that, also comprise: all base stations all in the time tranfer interval T TI moment that described System Frame Number N " and sub-frame offset Y " determines, send scheduling of resource instruction to user equipment (UE).
3. according to the method described in claim 1 or 2, it is characterized in that, described serving BS or the current System Frame Number N of non-serving base stations refer to:
If described serving BS and the current System Frame Number of described non-serving base stations and frame boundaries synchronously align, then get the System Frame Number of any one base station as described current System Frame Number N;
If the System Frame Number of described serving BS and described non-serving base stations border that is inconsistent and/or System Frame Number does not line up, then described serving BS and described non-serving base stations are carried out the synchronous adjustment of System Frame Number, or to be as the criterion with the System Frame Number of the base station after comparatively and sub-frame offset at computational resource scheduling instance and to adjust, using the System Frame Number after adjustment as described current System Frame Number N.
4. in accordance with the method for claim 3, it is characterized in that, described serving BS calculates and can be in sub-frame offset Y ' in the sum of subframe in radio frames scope and System Frame Number N ', specifically comprises:
According to the delay summation T completing moment X, described X2 interface of described structure scheduling of resource instruction
delayand described guard time T
protectionsum, calculates sub-frame offset Y, that is:
Y＝X+T
delay+T
protection；
Wherein, described X, described T
delay, T
protectionand described Y is all in units of described TTI;
If the described sub-frame offset Y calculated is less than subframe sum in radio frames, namely described Y is in radio frames within the scope of subframe, then described current System Frame Number N is namely as described System Frame Number N ', the Y calculated and described sub-frame offset value Y ';
If the described sub-frame offset calculated to be more than or equal in radio frames subframe sum, namely described Y exceeds subframe scope in radio frames, then using N+1 as described System Frame Number N ', using described Y to number of sub frames delivery in radio frames as described in sub-frame offset value Y '; That is:
N′＝N+1；Y′＝Y mod10。
5. in accordance with the method for claim 4, it is characterized in that, described sub-frame offset Y ' and System Frame Number N ' adjusts in the predetermined subframe of ascending resource scheduling by described serving BS, tries to achieve described System Frame Number N " and sub-frame offset Y ", specifically comprises:
When the described sub-frame offset Y ' calculated conforms to the predetermined subframe of described ascending resource scheduling, then using described N ', described Y ' directly as described System Frame Number N " and sub-frame offset Y "; When the described sub-frame offset Y ' calculated is not inconsistent with the predetermined subframe of described ascending resource scheduling, then described System Frame Number N ' is adjusted to N '+1 and tries to achieve System Frame Number N ", and the predetermined subframe described Y ' being adjusted to described ascending resource scheduling tries to achieve described sub-frame offset Y ";
All base stations, all in the described TTI moment that described System Frame Number N " and sub-frame offset Y " determines, send ascending resource scheduling instruction to user equipment (UE) or receive upstream data from UE.
6. in accordance with the method for claim 4, it is characterized in that, described serving BS, by described sub-frame offset Y ' and System Frame Number N " the unified subframe Y adjusted in multiple descending predetermined subframe ", is tried to achieve described System Frame Number N " and described sub-frame offset Y ", is specifically comprised:
When the described sub-frame offset Y ' calculated is less than last subframe in described descending predetermined subframe, described sub-frame offset Y ' of adjusting in described descending predetermined subframe is greater than described Y ' and subframe immediate with described Y ', try to achieve described sub-frame offset Y ", and using described N ' as described System Frame Number N "; When the described sub-frame offset Y ' calculated is more than or equal to last subframe in described descending predetermined subframe, described sub-frame offset Y ' to be adjusted in described descending predetermined subframe in first subframe, try to achieve described sub-frame offset Y ", and using described N '+1 as described System Frame Number N ";
All base stations all in the described TTI moment that described System Frame Number N " and described sub-frame offset Y " determines, send scheduling downlink resource instruction to user equipment (UE).
7. carry out a serving BS for isochronous resources scheduling, comprising: scheduling of resource instruction constructing module, scheduling instance computing module and message transmission/reception module; Wherein:
Described scheduling of resource instruction constructing module, be connected with described scheduling instance computing module and described message transmission/reception module respectively, for after the instruction of structure scheduling of resource, the moment X completing the instruction of structure scheduling of resource is exported to described scheduling instance computing module; Return at described scheduling instance computing module and represent the unified System Frame Number N " and sub-frame offset Y " sending the scheduling of resource instruction moment in the base station of all participation associating Multipoint process, described System Frame Number N " and described sub-frame offset Y " is exported to described message transmission/reception module;
Described scheduling instance computing module, for according to serving BS or the current System Frame Number N of non-serving base stations, and according to the described X of input, the delay summation T of X2 interface
delayand guard time T
protectionsum, calculate and can be in sub-frame offset Y ' within the scope of the subframe of radio frames and System Frame Number N ', and according to the predetermined subframe of scheduling of resource, described sub-frame offset Y ' and System Frame Number N ' is adjusted, try to achieve described System Frame Number N " and sub-frame offset Y ", the described N tried to achieve " and described Y " is returned to described scheduling of resource instruction constructing module;
Described message transmission/reception module, for inserting in scheduling of resource message by the described System Frame Number N " and described sub-frame offset Y " of input, will send to the non-serving base stations of all participation associating Multipoint process by described X2 interface in described scheduling of resource message.
8. according to serving BS according to claim 7, it is characterized in that, described serving BS or the current System Frame Number N of non-serving base stations refer to:
If described serving BS and the current System Frame Number of described non-serving base stations and frame boundaries synchronously align, then get the System Frame Number of any one base station as described current System Frame Number N;
If the System Frame Number of described serving BS and described non-serving base stations border that is inconsistent and/or System Frame Number does not line up, then described serving BS and described non-serving base stations are carried out the synchronous adjustment of System Frame Number, or to be as the criterion with the System Frame Number of the base station after comparatively and sub-frame offset at computational resource scheduling instance and to adjust, using the System Frame Number after adjustment as described current System Frame Number N.
9., according to the serving BS described in claim 7 or 8, it is characterized in that,
Described scheduling instance computing module, calculates the sub-frame offset Y ' that can be in radio frames in subframe sum scope and refers to System Frame Number N ': according to the delay summation T completing moment X, described X2 interface of described structure scheduling of resource instruction
delayand described guard time T
protectionsum, calculates sub-frame offset Y, that is:
Y＝X+T
delay+T
protection；
Wherein, described X, described T
delay, T
protectionand described Y is all in units of described TTI;
If the described sub-frame offset Y calculated is less than subframe sum in radio frames, namely described Y to be in radio frames within the scope of subframe, then described current System Frame Number N is namely as the transmission of actual data or the System Frame Number N ' of the time of reception, asks the described Y and described sub-frame offset value Y ' that calculate;
If the described sub-frame offset calculated to be more than or equal in radio frames subframe sum, namely described Y exceeds subframe scope in radio frames, then using N+1 as described System Frame Number N ', using described Y to number of sub frames delivery in radio frames as described in sub-frame offset value Y '; That is:
N′＝N+1；Y′＝Y mod10。
10., according to serving BS according to claim 9, it is characterized in that,
Described scheduling instance computing module, adjusts in the predetermined subframe of ascending resource scheduling by described sub-frame offset Y ' and System Frame Number N ', tries to achieve described System Frame Number N " and sub-frame offset Y ", that is:
When the described sub-frame offset Y ' calculated conforms to the predetermined subframe of described ascending resource scheduling, then using described N ', described Y ' directly as described System Frame Number N " and sub-frame offset Y "; When the described sub-frame offset Y ' calculated is not inconsistent with the predetermined subframe of described ascending resource scheduling, then described System Frame Number N ' is adjusted to N '+1 and tries to achieve System Frame Number N ", and the predetermined subframe described Y ' being adjusted to described ascending resource scheduling tries to achieve described sub-frame offset Y ".
11., according to serving BS according to claim 9, is characterized in that,
Described scheduling instance computing module, by described sub-frame offset Y ' and System Frame Number N " the unified subframe Y adjusted in multiple descending predetermined subframe ", tries to achieve described System Frame Number N " and described sub-frame offset Y ", that is:
When the described sub-frame offset Y ' calculated is less than last subframe in described descending predetermined subframe, described sub-frame offset Y ' of adjusting in described descending predetermined subframe is greater than described Y ' and subframe immediate with described Y ', try to achieve described sub-frame offset Y ", and using described N ' as described System Frame Number N "; When the described sub-frame offset Y ' calculated is more than or equal to last subframe in described descending predetermined subframe, described sub-frame offset Y ' to be adjusted in described descending predetermined subframe in first subframe, try to achieve described sub-frame offset Y ", and using described N '+1 as described System Frame Number N ".
12. 1 kinds of non-serving base stations carrying out isochronous resources scheduling, comprising: comprise interconnective message transmission/reception module and scheduling of resource moment parsing module; Wherein:
Described message transmission/reception module, for exporting to described scheduling of resource moment parsing module by the scheduling of resource message from serving BS received by X2 interface; After receiving the System Frame Number N " and sub-frame offset Y " that described scheduling of resource moment parsing module returns, when described System Frame Number N " and described sub-frame offset Y " determines, send upstream or downstream dispatch command to UE, or receive upstream data from UE;
Described scheduling of resource moment parsing module, for returning to described message transmission/reception module by the described System Frame Number N " and described sub-frame offset Y " in the expression scheduling of resource moment parsed in the scheduling of resource message from input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910137956.5A CN101877908B (en) | 2009-04-28 | 2009-04-28 | Base stations and method for synchronously scheduling resources among same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910137956.5A CN101877908B (en) | 2009-04-28 | 2009-04-28 | Base stations and method for synchronously scheduling resources among same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101877908A CN101877908A (en) | 2010-11-03 |
| CN101877908B true CN101877908B (en) | 2015-01-28 |
Family
ID=43020344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910137956.5A Expired - Fee Related CN101877908B (en) | 2009-04-28 | 2009-04-28 | Base stations and method for synchronously scheduling resources among same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101877908B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102594530B (en) * | 2011-01-10 | 2017-12-22 | 中兴通讯股份有限公司 | A kind of method and system for transmitting uplink collaboration data |
| CN102761951B (en) * | 2011-04-26 | 2015-01-07 | 华为技术有限公司 | Clock synchronization processing method, device and communication system |
| CN102761955B (en) * | 2011-12-30 | 2016-04-27 | 慕福奇 | A kind of data transfer control method of multi-hop wireless network |
| CN102638333B (en) * | 2012-03-22 | 2015-06-10 | 电信科学技术研究院 | Method and device for scheduling uplink data |
| CN103391526A (en) * | 2012-05-10 | 2013-11-13 | 华为技术有限公司 | Method and device for data boundary determining and method and device for indicating information sending |
| CN108377178B (en) * | 2012-06-28 | 2020-09-08 | 华为技术有限公司 | Channel state information measuring method, terminal and base station |
| CN103765967A (en) * | 2012-07-31 | 2014-04-30 | 华为技术有限公司 | Channel boundary locating method, user terminal and base station |
| CN104186014B (en) | 2013-02-18 | 2018-08-21 | 华为技术有限公司 | A kind of method and device that net cast synchronizes |
| CN103249164B (en) * | 2013-04-08 | 2015-10-28 | 江苏物联网研究发展中心 | A kind of resource regulating method of chain wireless network and base station |
| CN106550389A (en) * | 2015-09-21 | 2017-03-29 | 中兴通讯股份有限公司 | A kind of acquisition methods of up-link frame number difference, base station, terminal |
| CN106686669B (en) * | 2015-11-11 | 2021-01-26 | 中兴通讯股份有限公司 | Synchronization method and device |
| CN105357726B (en) * | 2015-12-11 | 2018-07-03 | 江苏鑫软图无线技术股份有限公司 | LTE fast switch over method based on downlink timing offset and target BS pre-authorization |
| CN107770867A (en) * | 2016-08-19 | 2018-03-06 | 中兴通讯股份有限公司 | Cooperation control method and device between WAP |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1815909A (en) * | 2005-01-31 | 2006-08-09 | 株式会社日立国际电气 | System and method for synchronization between base stations |
| CN101064561A (en) * | 2006-04-29 | 2007-10-31 | 华为技术有限公司 | Method for realizing uplink synchronization during inter-cell switch process |
-
2009
- 2009-04-28 CN CN200910137956.5A patent/CN101877908B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1815909A (en) * | 2005-01-31 | 2006-08-09 | 株式会社日立国际电气 | System and method for synchronization between base stations |
| CN101064561A (en) * | 2006-04-29 | 2007-10-31 | 华为技术有限公司 | Method for realizing uplink synchronization during inter-cell switch process |
Non-Patent Citations (2)
| Title |
|---|
| Fujitsu.Efficient HARQ Protocol for SIC based DL CoMP.《3GPP TSG-RAN1 #55,R1-084294,Efficient HARQ Protocol for SIC based DL CoMP》.3GPP,2008,全文. * |
| Huawei.Inter-eNB and Intra-eNB Schemes for CoMP in LTE-Advanced.《3GPP TSG RAN WG1#54,R1-083050,Inter-eNB and Intra-eNB Schemes for CoMP in LTE-Advanced》.3GPP,2008,全文. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101877908A (en) | 2010-11-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101877908B (en) | Base stations and method for synchronously scheduling resources among same | |
| US11917570B2 (en) | Reference timing delivery to user equipment with propagation delay compensation | |
| US11283558B2 (en) | Method and apparatus for uplink and downlink transmission alignment | |
| US20200404604A1 (en) | Wireless communication including xr traffic awareness | |
| EP2786630B1 (en) | Efficient spectrum utilization with almost blank subframes | |
| TWI673987B (en) | Flexible frame structure for ofdm systems | |
| CN107534864A (en) | Carry out the LBT technologies of frequency reuse in a communications system using unlicensed wave band | |
| CN109150486B (en) | Measurement method and user equipment | |
| EP2892291B1 (en) | Communication control apparatus, communication control method, terminal apparatus, program and communication control system | |
| CN110417521A (en) | Method, equipment and the storage medium of asynchronous uplink | |
| CN107113675A (en) | Cell switching method, device and equipment | |
| CN106162658A (en) | A kind of method of data transmission | |
| CN104937867A (en) | Intercell interference coordination accounting for machine type communication | |
| CN104272608A (en) | Method for dynamic allocation of radio resources in wireless communication system and device therefor | |
| CN104885506A (en) | Method for sharing wireless resource information in multi-cell wireless communication system and apparatus for same | |
| CN104995980A (en) | Terminal device, base station device, communications method, and integrated circuit | |
| CN104683082A (en) | Wireless communication system and method for carrying out wireless communication in wireless communication system | |
| EP2826185A1 (en) | Systems and methods for configuring downlink harq feedback transmissions in a wireless network | |
| CN105052068A (en) | Method for enabling terminal to transmit and receive signal in wireless communications system and apparatus therefor | |
| CN104995979A (en) | Terminal device, base station device, communication method, and integrated circuit | |
| JP2015523763A (en) | Synchronization tracking reference signal transmission processing, reception processing method and apparatus | |
| CN103796315A (en) | PRB (Physical Resource Block) configuration method and device of USS (UE specific Search Space) | |
| CN101932091A (en) | Coordinated multi-point transmission system and method as well as relevant device | |
| US9282583B2 (en) | Base station, wireless communication method, user equipment, and wireless communication system | |
| CN101882985A (en) | Indicating method for sending hybrid automatic repeat request (HARQ) and base station thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150128 Termination date: 20190428 |