CN101925128A - Method and device for reporting buffer status report - Google Patents
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Abstract
The invention discloses a method for reporting a buffer status report, which is used for reporting a buffer status under the condition of carrier wave aggregation and comprises the steps that: UE (User Equipment) judges whether a triggering condition of reporting the BSR (Buffer Status Report) is satisfied or not in a communication system adopting a carrier wave aggregation technology; the buffer status is obtained by the UE under the condition that UE confirms that the triggering condition of reporting the BSR is satisfied; and UE determines a member carrier wave from a plurality of member carrier waves and reports the BSR by the determined member carrier wave. The invention also discloses a device used for realizing the method.
Description
Technical field
The present invention relates to the communications field, particularly relate to the method and the device that report buffer status report.
Background technology
The Long Term Evolution of upgrading (LTE Advanced, LTE-A) peak rate of system is compared with the LTE system huge raising, and in order to satisfy this point, the LTE-A system has introduced carrier aggregation (CarrierAggregation, CA) technology.Carrier aggregation technology be meant in a sub-district up-downgoing respectively comprise a plurality of member carriers (Component Carrier, CC), rather than LTE and before wireless communication system in have only the pattern of a cover carrier wave.
From the angle of subscriber equipment (UE), UE is downlink data receiving and schedule information on a plurality of downlink member carriers simultaneously, also can send upstream data and to the feedback of downlink data on a plurality of uplink member carrier.
In addition, transmitting uplink data is by base station scheduling, and to distribute the foundation of ascending resource to UE be the upstream data amount that UE need send in the base station, i.e. the buffer status of UE.Therefore UE need to the base station report buffer status report (Buffer State Report, BSR).
Still there is not at present the solution that under the situation of carrier aggregation, reports BSR.
A kind of possible scheme is that each member carrier all reports a BSR.Because the corresponding transmission channel independently of each member carrier, independent body's transmission block (Transport Block separately, TB), so possibility different members carrier wave can hold the stock number difference of buffer status report, the BSR difference that causes the different members carrier wave to report.Different BSR may be received from different member carriers in the base station in a subframe, cause the misunderstanding of base station easily, and possibly can't the reasonable distribution resource.
Summary of the invention
The embodiment of the invention provides a kind of method and device that reports buffer status report, is used to be implemented under the situation of carrier aggregation report buffer status report.
A kind of method that reports buffer status report is applied to adopt the communication system of carrier aggregation technology, and this method may further comprise the steps:
User equipment (UE) judges whether to satisfy the trigger condition that reports buffer status report BSR;
UE obtains buffer status determining to satisfy under the situation of the trigger condition that reports buffer status report BSR;
UE determines a member carrier from a plurality of member carriers, and reports buffer status report BSR by the member carrier of determining.
A kind of subscriber equipment with carrier aggregation function comprises:
Trigger judge module, be used to judge whether satisfied the trigger condition that reports buffer status report BSR;
Cache module is used for obtaining buffer status determining to satisfy under the situation of the trigger condition that reports buffer status report BSR;
Interface module is used for determining a member carrier from a plurality of member carriers, and reports buffer status report BSR by the member carrier of determining.
The embodiment of the invention reports BSR as far as possible on a member carrier in the communication system that adopts carrier aggregation technology, promptly only report a BSR, has realized reporting buffer status under the situation of carrier aggregation, and has avoided the misunderstanding of base station.
Description of drawings
Fig. 1 is for reporting the main method flow chart of buffer status report in the embodiment of the invention;
Fig. 2 is the method flow diagram that reports buffer status report when limiting trigger condition in the embodiment of the invention;
Fig. 3 is the structure chart of MAC head in the embodiment of the invention;
Fig. 4 is the structure chart of the MAC CE of short-and-medium BSR of the embodiment of the invention and brachymemma BSR;
Fig. 5 is the structure chart of the MAC CE of long BSR in the embodiment of the invention;
Fig. 6 reports the method flow diagram of buffer status for giving the correct time in the restriction in the embodiment of the invention;
Fig. 7 is the structure chart of UE in the embodiment of the invention.
Embodiment
The embodiment of the invention only reports BSR on a member carrier under the situation of carrier aggregation, promptly only report a BSR, has realized reporting buffer status under the situation of carrier aggregation, and has avoided the misunderstanding of base station.
Referring to Fig. 1, in the communication system of carrier aggregation, report the main method flow process of buffer status report as follows in the present embodiment:
Step 101:UE judges and determines to satisfy the trigger condition that reports BSR.
Step 102:UE obtains buffer status.
Step 103:UE determines a member carrier from a plurality of member carriers, and reports buffer status report BSR by the member carrier of determining.Concrete, UE determines to carry the member carrier of BSR from a plurality of member carriers, can be any member carrier that can carry BSR.If all member carriers all do not have enough available resources to report BSR in the current subframe, in a plurality of member carriers of next subframe, determine to carry the member carrier of BSR so.
Wherein, trigger condition comprises: conventional BSR trigger condition, periodically BSR trigger condition and BSR trigger condition incidentally.
Conventional BSR (Regular BSR) trigger condition is: (1) triggering when having data to arrive than the data arrival of the data higher priority in the current cache (buffer) or in originally for empty buffer; Trigger when (2) in the overtime and buffer memory of RETX_BSR_TIMER (retransmit BSR timer) data being arranged.
Periodically BSR (Periodic BSR) trigger condition is: trigger under the overtime situation of BSR periodic report timer (PERIODICBSR TIMER).
Incidentally BSR (Padding BSR) trigger condition is: if UE in organizing media access control layer Packet Data Unit (MAC PDU), also has resource to use except the data of needs transmission, can trigger Padding BSR.
More than three kinds of trigger conditions may be triggered simultaneously, and may trigger a plurality of incidentally BSR simultaneously.Therefore, present embodiment is by offering the purpose that realization only reports a BSR on restriction trigger condition and the restriction BSR.Describe in detail below by two embodiment.
Referring to Fig. 2, report the method flow of buffer status report as follows when limiting trigger condition in the present embodiment:
Whether step 201:UE judges to have triggered before the current subframe and reports BSR, if then continue step 204, otherwise continue step 202.This step can avoid taking place a plurality of triggerings.
Step 202:UE judges whether to satisfy conventional BSR trigger condition or cycle BSR trigger condition, if satisfy a trigger condition at least, then continues step 203, otherwise continues step 205.
Step 203:UE triggers according to conventional BSR trigger condition or cycle BSR trigger condition and reports BSR, and obtains buffer status.Conventional BSR or all report complete BSR when the cycle, BSR was triggered.Wherein, BSR is divided into complete BSR and non-complete BSR from the form angle.Complete BSR comprises long BSR and short BSR.Non-complete BSR comprises the BSR of brachymemma.
Step 204:UE has judged whether that available resources can report BSR, if then continue step 207, otherwise process ends.
Step 205:UE judges whether to satisfy incidentally BSR trigger condition, if, then continue step 206, otherwise process ends.When a plurality of member carriers had the available resources that can place BSR incidentally, UE judged and determines that also a member carrier triggers incidentally BSR.
Because the priority of conventional BSR or cycle BSR is higher than incidentally BSR, so earlier conventional BSR or cycle BSR are judged in the present embodiment.
Step 206:UE foundation incidentally BSR trigger condition triggers BSR on a member carrier, and obtains buffer status.
Step 207:UE determines that from a plurality of member carriers a member carrier reports BSR.UE may trigger the BSR that reports different-format according to different trigger conditions, can be according to definite member carrier from a plurality of member carriers of the required resource of the BSR that reports.
UE can further be restarted RETX_BSR_TIMER.If the BSR that reports in step 207 is not the BSR of brachymemma, then UE also need be restarted PERIODIC BSR TIMER, so that next time trigger condition is judged.
In step 206, each member carrier can be used for carrying the incidentally stock number possibility difference of BSR under the situation of carrier aggregation, and from satisfying actual needs and saving resource view and consider, incidentally BSR triggers following specific implementation:
When the data of having only a logic channel group in the buffer memory of UE need to give the correct time, UE according to one incidentally BSR on the member carrier of size more than or equal to first resource threshold (as 2 bytes (byte)) of available resources, report short BSR; Can be to report short BSR on any member carrier that satisfies condition;
When the data that a plurality of logic channel groups are arranged in the buffer memory of UE need to give the correct time, UE according to one incidentally BSR on the member carrier of size more than or equal to second resource threshold (as 4byte) of available resources, report long BSR; Wherein second resource threshold is greater than first resource threshold;
In the buffer memory of UE, there are the data of a plurality of logic channel groups to report, and the size of not having available resources is during more than or equal to the member carrier of second resource threshold, and UE reports the BSR of brachymemma on the member carrier of size more than or equal to first resource threshold of available resources.
In step 203 and step 206, mention the BSR of three kinds of forms.BSR comprises MAC head and MAC Control Element (MAC CE) two parts, and wherein the form of MAC head can be referring to shown in Figure 3.Long BSR is different at the form of the MAC of BSR CE part with short BSR and brachymemma BSR, referring to the MAC CE of short BSR shown in Figure 4 and brachymemma BSR partly and the MAC CE part of long BSR shown in Figure 5.Can be good at BSR reports used bit number to report used bit number more than short BSR and brachymemma BSR.Wherein, the LCID (Logical Channel ID) in the MAC head is used to identify the logical channel number of corresponding load part, and the BSR of long BSR, short BSR and brachymemma respectively has a LCID.E represents extended bit, and being used to indicate next byte is MAC head or MAC load.R represents reserved bit.LCG ID presentation logic channel group numbering always has 4 logic channel groups in the present embodiment, represent with 0～3 respectively.Buffer Size represents the metadata cache amount in the counterlogic channel group
Referring to Fig. 6, giving the correct time in the restriction in the present embodiment reports the method flow of buffer status report as follows:
Step 601:UE judges whether to satisfy conventional BSR trigger condition or cycle BSR trigger condition, if satisfy a trigger condition at least, then continues step 602, otherwise continues step 603.
Step 602:UE triggers conventional BSR or cycle BSR, and obtains buffer status.This step can connect step 603 later on, also can connect step 605 later on.
Step 603:UE judges whether each member carrier satisfies incidentally BSR trigger condition, if having at least a member carrier to satisfy incidentally BSR trigger condition, then continues step 604, otherwise continues step 605.
Step 604:UE triggers satisfying on the member carrier of trigger condition according to BSR incidentally and triggers BSR, and obtains buffer status.
Step 605:UE has judged whether that BSR triggers, and the resource of holding BSR is arranged, if having, then continues step 606, otherwise process ends.
Step 606:UE judges whether that existing MAC PDU has comprised BSR, if, process ends then, otherwise continue step 607.
Step 607:UE determines that from a plurality of member carriers a member carrier reports BSR.When triggering conventional BSR, BSR and incidentally during BSR periodically, UE according to the conventional BSR that triggers or periodically BSR report BSR.When triggering a plurality of incidentally BSR, UE only reports BSR in a member carrier.
Wherein step 605 and 606 execution sequence can exchange, as judging whether that earlier existing MAC PDU has comprised BSR, if process ends then, otherwise judged whether that again BSR triggers, and the resource of holding BSR is arranged, if the BSR triggering is arranged and the resource of holding BSR is arranged, then continue step 607, otherwise process ends.
In step 604, UE is according to trigger and when reporting incidentally BSR, the member carrier of selecting to carry complete BSR reports, and is implemented as follows as far as possible:
Give the correct time on the data of having only a logic channel group in the buffer memory of UE need, UE reports short BSR on the member carrier of size more than or equal to first resource threshold of available resources;
Give the correct time on the data that a plurality of logic channel groups are arranged in the buffer memory of UE need, UE reports long BSR on the member carrier of size more than or equal to second resource threshold of available resources; Wherein second resource threshold is greater than first resource threshold;
In the buffer memory of UE, there are the data of a plurality of logic channel groups to report, and the size of not having available resources is during more than or equal to the member carrier of second resource threshold, and UE reports the BSR that comprises brachymemma on the member carrier of size more than or equal to first resource threshold of available resources.
Understood the implementation procedure that reports buffer status under the situation of carrier aggregation by above introduction, this process mainly realizes that by UE the 26S Proteasome Structure and Function to UE is introduced below.
Referring to Fig. 7, UE comprises triggering judge module 701, cache module 702 and interface module 703 in the present embodiment.
Triggering judge module 701 is used to judge and definite satisfied trigger condition that reports buffer status report BSR.Concrete, trigger judge module 701 and judge whether to satisfy conventional BSR trigger condition, cycle BSR trigger condition and BSR trigger condition etc. incidentally.Trigger judge module 701 and can limit trigger condition, promptly judge and determine to have satisfied conventional BSR trigger condition or periodicity BSR trigger condition, and do not carry out the incidentally judgement of BSR trigger condition; And when a plurality of member carriers have the available resources that can place BSR incidentally, judge and also determine only on a member carrier, to trigger incidentally BSR.Perhaps, when triggering judge module 701 and defining a plurality of trigger conditions and satisfy, 703 of trigger interface modules report a BSR.
Give the correct time on the data of having only a logic channel group in the cache module 702 need, interface module 703 reports short BSR on the member carrier of size more than or equal to first resource threshold of available resources;
Give the correct time on the data that a plurality of logic channel groups are arranged in the cache module 702 need, interface module 703 reports long BSR on the member carrier of size more than or equal to second resource threshold of available resources; Wherein second resource threshold is greater than first resource threshold;
In cache module 702, there are the data of a plurality of logic channel groups to report, and the size of not having available resources is during more than or equal to the member carrier of second resource threshold, and interface module 703 reports the BSR of brachymemma on the member carrier of size more than or equal to first resource threshold of available resources.
UE also comprises: report judge module, be used to judge whether that the MAC PDU of existing member carrier has comprised BSR.Interface module 703 is under the situation not in judged result, reports buffer status report BSR in a member carrier.
More than to restriction and the restriction that reports and each configuration parameter etc. of trigger condition among the UE, by multiplexing and assembling (multiplexing and assembly) entity control.
Be used to realize that the software of the embodiment of the invention can be stored in storage mediums such as floppy disk, hard disk, CD and flash memory.
The embodiment of the invention only reports BSR on a member carrier under the situation of carrier aggregation, promptly only report a BSR, has realized reporting buffer status report under the situation of carrier aggregation, and has avoided the misunderstanding of base station.The embodiment of the invention only determines a trigger condition by the restriction trigger condition, has then realized reporting BSR on a member carrier according to a trigger condition.And the embodiment of the invention provides another kind of implementation, does not limit trigger condition, satisfying under the situation of a plurality of trigger conditions, and the mode that restriction reports, thus realized on a member carrier, reporting BSR.And the embodiment of the invention provides subsequent expansion under the situation that triggers a plurality of incidentally BSR, introduce the space of other padding MAC CE.。
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (14)
1. method that reports buffer status report is applied to adopt the communication system of carrier aggregation technology, it is characterized in that, said method comprising the steps of:
User equipment (UE) judges whether to satisfy the trigger condition that reports buffer status report BSR;
UE obtains buffer status determining to satisfy under the situation of the trigger condition that reports buffer status report BSR;
UE determines a member carrier from a plurality of member carriers, and reports buffer status report BSR by the member carrier of determining.
2. the method for claim 1 is characterized in that, trigger condition comprises: conventional BSR trigger condition, periodically BSR trigger condition and at least a trigger condition in the BSR trigger condition incidentally.
3. method as claimed in claim 2, it is characterized in that, UE judges whether that the step that satisfies the trigger condition that reports buffer status report BSR comprises: UE judges whether to satisfy conventional BSR trigger condition or periodicity BSR trigger condition, and does not carry out the incidentally judgement of BSR trigger condition; When a plurality of member carriers had the available resources that can place BSR incidentally, UE judged whether a member carrier satisfies incidentally BSR trigger condition.
4. method as claimed in claim 2 is characterized in that, UE judges whether that the step that satisfies the trigger condition that reports buffer status report BSR comprises: UE judges whether to satisfy conventional BSR trigger condition, periodically BSR trigger condition and BSR trigger condition incidentally;
UE reports the step of buffer status report BSR to comprise by the member carrier of determining: UE is determining to have satisfied conventional BSR trigger condition, BSR trigger condition and incidentally under the situation of BSR trigger condition periodically, according to conventional BSR that triggers or periodicity BSR, report buffer status report BSR by the member carrier of determining.
5. method as claimed in claim 2, it is characterized in that, UE determines a member carrier from a plurality of member carriers, and report the step of buffer status report BSR to comprise: when triggering a plurality of incidentally BSR by the member carrier of determining, UE determines a member carrier from a plurality of member carriers, and reports buffer status report BSR by the member carrier of determining.
6. method as claimed in claim 5 is characterized in that, BSR comprises the BSR of long BSR, short BSR and brachymemma;
UE determines a member carrier from a plurality of member carriers, and reports the step of buffer status report BSR to comprise by the member carrier of determining:
Give the correct time on the data of having only a logic channel group in the buffer memory of UE need, UE reports short BSR on the member carrier of size more than or equal to first resource threshold of available resources;
Give the correct time on the data that a plurality of logic channel groups are arranged in the buffer memory of UE need, UE reports long BSR on the member carrier of size more than or equal to second resource threshold of available resources; Wherein second resource threshold is greater than first resource threshold;
In the buffer memory of UE, there are the data of a plurality of logic channel groups to report, and the size of not having available resources is during more than or equal to the member carrier of second resource threshold, and UE reports the BSR of brachymemma on the member carrier of size more than or equal to first resource threshold of available resources.
7. as each described method in the claim 1 to 6, it is characterized in that, UE reports before the buffer status report BSR by the member carrier of determining, judges whether that the media access control layer Packet Data Unit MAC PDU of an existing member carrier has comprised BSR;
UE is under the situation not in judged result, reports buffer status report BSR by the member carrier of determining.
8. the subscriber equipment with carrier aggregation function is characterized in that, comprising:
Trigger judge module, be used to judge whether satisfied the trigger condition that reports buffer status report BSR;
Cache module is used for obtaining buffer status determining to satisfy under the situation of the trigger condition that reports buffer status report BSR;
Interface module is used for determining a member carrier from a plurality of member carriers, and reports buffer status report BSR by the member carrier of determining.
9. subscriber equipment as claimed in claim 8 is characterized in that trigger condition comprises: conventional BSR trigger condition, periodically BSR trigger condition and at least a trigger condition in the BSR trigger condition incidentally.
10. subscriber equipment as claimed in claim 9 is characterized in that, triggers judge module UE and judges whether to satisfy conventional BSR trigger condition or periodicity BSR trigger condition, does not carry out the incidentally judgement of BSR trigger condition simultaneously; And when a plurality of member carriers had the available resources that can place BSR incidentally, UE judged whether a member carrier satisfies incidentally BSR trigger condition.
11. subscriber equipment as claimed in claim 9 is characterized in that, triggers judge module UE and judges whether to satisfy conventional BSR trigger condition, periodically BSR trigger condition and BSR trigger condition incidentally;
Interface module is determining to have satisfied conventional BSR trigger condition, BSR trigger condition and incidentally under the situation of BSR trigger condition periodically, according to conventional BSR that triggers or BSR periodically, reports buffer status report BSR by the member carrier of determining.
12. subscriber equipment as claimed in claim 9 is characterized in that, when triggering a plurality of incidentally BSR, interface module is determined a member carrier from a plurality of member carriers, and reports buffer status report BSR by the member carrier of determining.
13. subscriber equipment as claimed in claim 12 is characterized in that, BSR comprises the BSR of long BSR, short BSR and brachymemma;
Give the correct time on the data of having only a logic channel group in the cache module need, interface module reports short BSR on the member carrier of size more than or equal to first resource threshold of available resources;
Give the correct time on the data that a plurality of logic channel groups are arranged in the cache module need, interface module reports long BSR on the member carrier of size more than or equal to second resource threshold of available resources; Wherein second resource threshold is greater than first resource threshold;
In cache module, there are the data of a plurality of logic channel groups to report, and the size of not having available resources is during more than or equal to the member carrier of second resource threshold, and interface module reports the BSR of brachymemma on the member carrier of size more than or equal to first resource threshold of available resources.
14. as each described subscriber equipment in the claim 8 to 13, it is characterized in that, also comprise: report judge module, be used to judge whether that the MAC PDU of an existing member carrier has comprised BSR;
Interface module is under the situation not in judged result, reports buffer status report BSR by the member carrier of determining.
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