WO2012000177A1

WO2012000177A1 - Buffer status report reporting method and user device

Info

Publication number: WO2012000177A1
Application number: PCT/CN2010/074750
Authority: WO
Inventors: 张健; 黄亚达; 施小娟
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-06-29
Filing date: 2010-06-29
Publication date: 2012-01-05
Also published as: CN102577558B; CN102577558A

Abstract

A Buffer Status Report (BSR) reporting method and user device are provided by the present invention, wherein said method includes the following steps: a User Equipment (UE) selects a buffer size levels table according to the configuration status of the Uplink (UL) Component Carrier (CC) and/or the radio condition; said UE reports the BSR to an evolved NodeB (eNB) according to the selected buffer size levels table. Application of the present invention enables the eNB and the UE to unambiguously recognize the type of the BSR table used in the current Transmission Time Interval (TTI), enables the UE to get fine-grained accurate scheduling in the condition of both the LTE data rate and the LTE-A high data rate, saves the radio resources, and improves the utilization of the radio resources.

Description

Method for reporting buffer status report and user equipment

The present invention relates to the field of wireless communication technologies, and in particular, to a method for reporting a buffer status report in a wireless network, and a user equipment (User Equipment, UE for short).

Background technique

In the Evolved Universal Terrestrial Radio Access Network (E-UTRAN) of the third-generation mobile communication Long Term Evolution (LTE) system, the uplink data passes through the physical uplink. Physical Uplink Shared Channel (PUSCH) transmission. An uplink radio resource is allocated to each user equipment (User Equipment, UE for short) by an Evolved NodeB (eNB). The multiple access technology used by E-UTRAN is Orthogonal Frequency Division Multiplexing Access (OFDMA) technology. The Radio Resource Control (RRC) layer of the LTE system sends an RRC message to implement many processes such as establishing an RRC layer link, configuring system parameters, and transmitting UE capability parameters between the UE and the eNB. The RRC message of the downlink is sent on a Physical Downlink Shared Channel (PDSCH). Some common parameters related to the system, such as the cell frequency point and the cell system bandwidth, are sent by the eNB to all intra-cell UEs in the broadcast message, and the broadcast message is sent on the Physical Broadcast Channel (PBCH). of. In order to allocate resources and provide services to each UE according to its own needs, to achieve better multiplexing performance in uplink transmission, and to fully utilize system bandwidth in a flexible and efficient manner, the LTE system formulates uplink transmission resource allocation for users. A special control message. The control message dedicated to the resource allocation of the PUSCH is sent by the eNB to the UE, and the resource allocation control message is also referred to as an uplink grant (UpLink Grant, UL Grant for short), and the UL Grant is in the physical downlink control channel. (Physical Downlink Control Channel, referred to as PDCCH) is sent. In order to ensure that the radio resources are allocated to each UE, the LTE system requires the UE to report the status of the data stored in the buffer. The report is reported to the eNB in the form of a Buffer Status Report (BSR). In the LTE system, the Logical CHannel (LCH) is set to have different priorities. The LCHs are divided into four logical channel groups (LCGs). The BSR reports the groups of the UEs. The serial number and the information of the amount of data to be transmitted of all LCHs in the group. Since the BSR is an important reference information for the eNB to perform reasonable radio resource scheduling for the UE, the LTE system specifies various types and transmission rules of the BSR. According to the events that trigger the BSR, the BSR is divided into a regular buffer status report (Regular BSR), a periodic buffer status report (RTB), and a padding status report (Padding BSR). Among them, the trigger conditions of Regular B SR include:

> The upper layer with high priority logical channel can transmit data, and its priority is higher than the existing LCH data in the UE buffer;

> serving cell change; BSR retransmission timer ( RETX - BSR - TIMER ) times out, and there is data that can be transmitted in the UE buffer.

The trigger condition of the Periodic BSR is: If the BSR period timer (PERIODIC BSR TIMER) times out, the Periodic BSR is triggered.

The trigger condition of the Padding BSR is: if there is neither a Regular BSR to be sent nor a Periodic BSR to be sent, and the number of bits used for padding in the allocated uplink PUSCH resource is greater than or equal to the BSR MAC Control Element (Control Element, referred to as The sum of the sizes of CE and its sub-header triggers the Padding BSR.

The Padding BSR is a padded BSR that complements the Regular BSR and the Periodic BSR. In contrast, the Regular BSR and the Periodic BSR can be classified as unfilled BSRs. When the uplink does not send the Regular BSR and the Periodic BSR, the Padding BSR can let the eNB obtain the UE buffer LCG data change in a timely manner.

Regular BSR and Periodic BSR are encapsulated as media access control layer protocol data units. A MAC CE in the Media Access Control Protocol Data Unit (MAC PDU for short). The Padding BSR is padded in the padding bits (Padding) of the MAC PDU. The MAC PDU is sent on the PUSCH. According to the definition of the current LTE MAC layer protocol standard (3GPP TS36.321), the foregoing MAC PDU is as shown in FIG. 1. One MAC PDU is composed of one MAC header (header), zero or more MAC CEs, and zero. Or a plurality of MAC Service Data Units (SDUs) and optional padding bits (Padding). The MAC header is composed of multiple MAC sub-headers, and each MAC sub-header corresponds to the MAC CE, MAC SDU or Padding arranged after the MAC header in the order of arrangement, as shown in FIG. 2 and FIG. 3. The MAC sub-header of the BSR MAC CE corresponds to Figure 3 and is in the R/R/E/LCID format, where R is a reserved bit and E is an extended bit, indicating that there are other sub-message headers after the sub-message header. The LCID contained in the MAC sub-header is the type of the corresponding MAC CE or MAC SDU or Padding. The LCID of the above line is explained as follows.

Index (serial number) LCID value

00000 CCCH (Common Control Channel)

00001-01010 Identity of the logical channel

(logical channel identification)

01011-11001 Reserved (reserved)

11010 Power Headroom Report

(power headroom report)

11011 C-RNTI

(Cell wireless network temporary identification)

11100 Truncated BSR (Truncate BSR)

11101 Short BSR (short BSR)

11110 Long BSR (Long BSR)

11111 Padding (fill bits) According to the current protocol standard of the LTE MAC layer (3Gpp TS36.321), the Padding BSR can only transmit using the Padding bit of the MAC PDU.

There are two types of BSR formats defined by the LTE system. As shown in Figure 4 and Figure 5, the BSR format shown in Figure 4 is called the short BSR format or the Truncated BSR format. The BSR format shown in Figure 5 is called Long BSR format. The BSR is carried by the PUSCH. When the UE triggers the BSR, and only one LCG has data to be transmitted, the UE reports the BSR in a short BSR format. When the BSR triggered by the UE is a Regular BSR or a Periodic BSR, and multiple LCGs have data to be transmitted, the UE釆The BSR is reported in the long BSR format. When the BSR triggered by the UE is a Padding BSR, and multiple LCGs have data to be transmitted, and the Padding bit length of the MAC PDU is insufficient to transmit the long BSR format, the UE uses the truncated BSR. Format to report Padding BSR. In the above two BSR formats, the BSR of a single LCG is represented by 6 bits. The value of the 6 bit is used as a sequence number in the BSR buffer size levels table. The details of the table are as follows:

Index Buffer Size (BS) value Index Buffer Size (BS) value [bytes] [bytes]

(Serial number) (Serial number)

(buffer data amount value) (bytes) (buffer data amount value) (bytes)

0 32 1 132 < BS <= 1326

1 0 < ω BS <= 10 33 1326 < BS <= 1552

II

2 10 < BS < o= 12 34 1552 < BS <= 1817

3 12 < BS <= 14 35 1817 < BS <= 2127

4 14 < BS <= 17 36 2127 < BS <= 2490

5 17 < BS <= 19 37 2490 < BS <= 2915

6 19 < BS <= 22 38 2915 < BS <= 3413

7 22 < BS <= 26 39 3413 < BS <= 3995

8 26 < BS <= 31 40 3995 < BS <= 4677

9 31 < BS <= 36 41 4677 < BS <= 5476

10 36 < BS <= 42 42 5476 < BS <= 641 1

1 1 42 < BS <= 49 43 641 1 < BS <= 7505

12 49 < BS <= 57 44 7505 < BS <= 8787

13 57 < BS <= 67 45 8787 < BS <= 10287

14 67 < BS <= 78 46 10287 < BS <= 12043

15 78 < BS <= 91 47 12043 < BS <= 14099

16 91 < BS <= 107 48 14099 < BS <= 16507

17 107 < BS <= 125 49 16507 < BS <= 19325

18 125 < BS <= 146 50 19325 < BS <= 22624

19 146 < BS <= 171 51 22624 < BS <= 26487

20 171 < BS <= 200 52 26487 < BS <= 31009 21 200 < BS <= 234 53 31009 < BS <= 36304

22 234 < BS <= 274 54 36304 < BS <= 42502

23 274 < BS <= 321 55 42502 < BS <= 49759

24 321 < BS <= 376 56 49759 < BS <= 58255

25 376 < BS <= 440 57 58255 < BS <= 68201

26 440 < BS <= 515 58 68201 < BS <= 79846

27 515 < BS <= 603 59 79846 < BS <= 93479

28 603 < BS <= 706 60 93479 < BS <= 109439

29 706 < BS <= 826 61 109439 < BS <= 128125

30 826 < BS <= 967 62 128125 < BS <= 150000

31 967 < BS <=1 132 63 BS > 150000

To A counter? ? The definitions of the definitions are all defined in the current LTE release 8 standard. In order to meet the current and future demand for various wireless services, the next evolution standard of LTE release 8 has begun to enter the formulation process, namely LTE-Advanced (LTE). - Advanced, referred to as LTE-A) standard.

LTE-A is the 3rd Generation Partner Project (3GPP) organization to meet the International Telecommunication Union (ITU) International Mobile Telecommunication-Advanced (IMT- Advanced) is the standard that was introduced. The LTE-A system is an evolved version based on the LTE release 8 system. It introduces many new technologies to meet the basic requirements of IMT-Advanced. One of the important technologies is Carrier Aggregation (CA). Due to the current shortage of wireless spectrum resources, the spectrum resources owned by mobile operators in the world tend to be scattered, and IMT-Advanced requires higher peak rate indicators (100 Mbps for high mobility and 1 Gbps for low mobility). The current 20MHz bandwidth of the LTE standard cannot meet the requirements of IMT-Advanced, so it needs to be expanded to higher bandwidth, such as Frequency Division Duplex (FDD). Supports up to 80MHz, Time Division Duplex (TDD) supports up to 100MHz, so the amount of data that the UE can transmit is several times larger than that of LTE. In addition to increased bandwidth, in order to achieve higher speeds, Multi Input Multi Output (MIMO) is also the core technology to improve the throughput of LTE-A systems. Considering the increase of the uplink bandwidth (up to 5 times of the LTE bandwidth) and the uplink dual-stream MIMO (twice the LTE single stream), in the LTE-A system, the uplink rate of the UE will be increased to 10 times that of LTE.

The LTE-A version 10 (Rel-10) system CA aggregates up to five component carriers (CC) for downlink and/or uplink to support a maximum transmission bandwidth of 100 MHz, and uplink (UpLink, UL for short). The total number of configurations is less than or equal to the total configuration of Downlink (DL) CCs. Each CC corresponds to a Hybrid Automatic Repeat Request (HARQ) entity and a transport channel. There is a separate PDCCH on each DL CC to indicate resource allocation on the CC or resource allocation on other CCs, which is divided into a downlink resource allocation (DL assignment) or an uplink grant (UL grant). When the CC index (CIF) is configured, a 3-bit CIF on the PDCCH indicates component carrier identification information. The UE is configured with one downlink primary carrier (DL PCC, Downlink Primary CC) and one uplink primary carrier (UL PCC, Uplink Primary CC), and can configure 0 to 4 downlink secondary carriers (DL SCC, Downlink Secondary CC) and/or Or 0~4 uplink secondary carriers (UL SCC, Uplink Secondary CC). The DL PCC and the UL PCC form the primary serving cell (PCell) of the UE, and the PCell provides security and NAS mobility information, synchronization, access, system information, paging, etc., and the UE randomly connects. Entry can only be done through PCell. The UL PCC is configured with a PUCCH resource that transmits signaling such as HARQ ACK/NACK (Acknowledgement/No Acknowledgment), Scheduling Request (SR), and Channel Quality Indicator (CQI). The DL SCC and its associated UL SCC form a secondary serving cell (SCell). The SCell provides higher bandwidth and data throughput as the added radio resources, and the SCell may not include the UL SCC configuration. UL PCC and DL PCC are associated by information indicated by System Information Block 2 (SIB2); UL SCC and DL SCC are associated by SIB2 or dedicated signaling such as information indicated by RRC signaling; UL SCC can also be associated with DL SCC or DL PCC The reference DL CC that measures the downlink path loss or the reference DL CC that measures the timing advance is associated. At any time, the RRC Connected (RRC-CONNECTED) state of the UE must maintain a DL PCC and a UL PCC configuration. From the perspective of UE power saving and CC management, the eNB can pass the MAC. The CE activates/deactivates a certain DL SCC, and the DL PCC cannot be activated/deactivated. The UE does not monitor the PDCCH, does not receive the PDSCH, does not perform CQI related measurements, does not receive system information, supports mobility related measurements, turns off the baseband and/or radio frequency part modules, and performs corresponding RF frequencies on the DL SCC in the deactivated state. Point adjustment. Whether the UL SCC needs to support the activation/deactivation function and the corresponding UE behavior, such as whether to stop transmitting the reference signal (Sounding Reference Signal, SRS for short) or PUSCH data on the corresponding UL SCC, is currently under discussion.

Summary of the invention

The LTE standard buffer data volume level table (abbreviated as BSR table in this paper) can only represent the maximum 150K data in fine-grained manner, and all other services larger than 150K belong to the same BSR level, that is, if the BSR table of LTE is still used, then The high-throughput LTE-A service will make it impossible for the network to distinguish the UE from the 150K to 1500K buffer state, resulting in an inefficient allocation of resources. Therefore, 3GPP adds at least one new BSR table based on the BSR table of LTE to meet the requirements of the buffer state of 150K to 1500K accurately under the LTE-A large service throughput. However, how to use these forms after the UE supports multiple BSR forms has not been determined. The technical problem to be solved by the present invention is to provide a method for reporting a buffer status report and a user equipment to report a BSR in the case of multiple BSR tables. In order to solve the above technical problem, the present invention provides a buffer status report (BSR) reporting method, including: a user equipment (UE) selects a downlink (UL) component carrier (CC) according to an allocation condition and/or a wireless condition. The rushing area data amount ranking table; and the UE reporting the BSR to the evolved base station (eNB) according to the selected buffer data amount level table. Preferably, in the step of the UE selecting a buffer data amount level table according to the configuration condition of the UL CC and/or the wireless condition, the buffer data quantity level table selected by the UE is the first data quantity level table or the first a data volume ranking table; wherein the first data volume ranking table is a buffer number used by a Long Term Evolution (LTE) system According to the data level table, the second data volume level table is a buffer data volume level table for high data rate supported by the Advanced Long Term Evolution (LTE-A) system. Preferably, the step of the UE selecting a buffer data amount level table according to a configuration condition of the UL CC includes: when the UE configures one UL CC, selecting a first data amount level table; when the UE is configured When one or more UL CCs are selected, the second data amount level table is selected. Preferably, the radio condition is a downlink path loss measurement result; the step of the UE selecting the buffer data volume level table according to the radio condition comprises: when the downlink path loss measurement result is higher than a preset downlink path loss measurement result threshold, the UE selects a first data volume level table; when the downlink path loss measurement result is lower than a preset downlink path loss measurement result threshold, the UE selects a second data amount level table; or, the wireless condition is a channel quality indicator (CQI) measurement result; The step of the UE selecting the buffer data amount level table according to the wireless condition includes: when the CQI measurement result is lower than the preset CQI measurement result threshold, the UE selects the first data quantity level table; when the CQI measurement result is higher than the preset CQI When the result threshold is measured, the UE selects a second data amount level table; or, the radio condition is a power headroom report (PHR) value; and the step of the UE selecting the buffer data amount level table according to the radio condition includes: when the PHR value is low When the preset PHR threshold is reached, the UE selects the first data amount level table; when the PHR value is higher than the preset PHR threshold, the UE selects the second data amount level table. Preferably, the downlink path loss measurement result is one of the following: a downlink path loss measurement result of a downlink (DL) primary carrier (PCC), and a downlink path loss measurement in a DL CC associated with all UL CCs configured by the UE. The minimum or maximum value or average value of the result, the downlink path loss measurement result of the DL CC associated with any UL CC configured by the UE, and the downlink path loss measurement result of the DL CC associated with the specific UL CC; the CQI The measurement result is one of the following: a CQI measurement result of the DL PCC, a minimum value or a maximum value or an average value of CQI measurement results in the DL CC associated with all UL CCs configured by the UE, and any UL CC configured by the UE CQI measurement result of the associated DL CC, CQI measurement result of the DL CC associated with the specific UL CC; The PHR value is one of the following: a PHR value of the UL PCC, a minimum or maximum value or an average value of PHRs in all UL CCs configured by the UE, a PHR value of any one of the UL CCs configured by the UE, and a specific The PHR value of the UL CC and the PHR value of the UE. Preferably, the method further comprises: determining the DL CC associated with the UL CC according to an indication in the system information block 2 (SIB2) or a radio resource control (RRC) indication or a downlink path loss measurement reference or a timing advance measurement reference. Preferably, when the radio condition is a downlink path loss measurement result, the method further includes: when the BSR is reported by the UE, reporting the downlink path loss measurement result to the eNB; when the radio condition is CQI And the method further includes: when the UE_L3⁄4 BSR, reporting the CQI measurement result to the eNB; when the radio condition is a PHR value, the method further includes: reporting, by the UE, B In the case of SR, the PHR value is also sent to the eNB. Preferably, the step of the UE reporting the BSR to the eNB according to the selected buffer data volume level table includes: when the BSR is triggered to be reported, and the at least one UL CC has an uplink resource, the UE follows the selected buffer. The area data volume level table calculates the buffer data size level, generates a BSR medium access control layer control element (MAC CE), and reports the BSR to the UL CC with the uplink resource. In order to solve the above technical problem, the present invention provides a user equipment (UE), including a selection module and a reporting module, where: the selection module is configured to: according to an uplink (UL) component carrier (CC) configuration and/or wireless The conditional selection buffer data quantity level table; the reporting module is configured to: report the BSR to the evolved base station (eNB) according to the buffer data quantity level table selected by the selection module. Preferably, the selecting module is configured to: select a first data amount level table or a second data amount level table according to a configuration condition of the UL CC and/or a wireless condition; wherein the first data quantity level table is a long term evolution (LTE) Number of buffers used by the system According to the data level table, the second data volume level table is a buffer data volume level table for high data rate supported by the Advanced Long Term Evolution (LTE-A) system. Preferably, the selecting module is configured to: when the UE is configured with one UL CC, select a first data volume level table; when the UE is configured with more than one UL CC, select a second data volume Rating table. Preferably, the selecting module is configured to: when the wireless condition is a downlink path loss measurement result, when the downlink path loss measurement result is higher than a preset downlink path loss measurement result threshold, the first data volume level table is selected, and the current When the path loss measurement result is lower than the preset downlink path loss measurement result threshold, the second data amount level table is selected; or, when the wireless condition is the channel quality indicator (CQI) measurement result, when the CQI measurement result is lower than the preset When the CQI measurement result threshold is selected, the first data amount level table is selected, and when the CQI measurement result is higher than the preset CQI measurement result threshold, the second data amount level table is selected; or, the wireless condition is a power headroom report ( When the PHR value is lower than the preset PHR threshold, the first data amount level table is selected, and when the PHR value is higher than the preset PHR threshold, the second data amount level table is selected. Preferably, the downlink path loss measurement result is one of the following: a downlink (DL) primary carrier

The downlink path loss measurement result of (PCC), the minimum or maximum value or average value of the downlink path loss measurement result in the DL CC associated with all UL CCs configured by the UE, and the DL associated with any UL CC configured by the UE The downlink path loss measurement result of the CC, the downlink path loss measurement result of the DL CC associated with the specific UL CC; the CQI measurement result is one of the following: CQI measurement result of the DL PCC, and all UL CCs configured by the UE The minimum or maximum value or average value of the CQI measurement result in the associated DL CC, the CQI measurement result of the DL CC associated with any UL CC configured by the UE, and the CQI measurement result of the DL CC associated with the specific UL CC The PHR value is one of the following: a PHR value of the UL PCC, a minimum or maximum value or an average value of PHRs in all UL CCs configured by the UE, a PHR value of any one of the UL CCs configured by the UE, and a specific The PHR value of the UL CC and the PHR value of the UE. Preferably, the reporting module is further configured to: report the downlink path loss measurement result to the eNB when the wireless condition is a downlink path loss measurement result; when the wireless condition is a CQI measurement As a result, the CQI measurement result is reported to the eNB; when the radio condition is a PHR value, the PHR value is uploaded to the eNB. Preferably, the reporting module is configured to: when the BSR is triggered to be reported, and when at least one UL CC has an uplink resource, calculate a buffer data size level according to the selected buffer data amount level table, and generate a BSR media connection. The control layer control element (MAC CE) is sent to the BSR in the UL CC with the uplink resource.

The present invention is conveniently implemented to enable the UE to dynamically adjust the BSR table used in accordance with its radio conditions and/or traffic requirements to facilitate efficient scheduling of the eNB. The present invention can make the eNB and the UE unambiguously identify the type of the BSR table used by the current transmission time interval (ΤΉ), and can enable the UE to obtain fine-grained and precise scheduling in both the LTE data rate and the LTE-A high data rate. , saving wireless resources and improving wireless resource utilization.

1 is a schematic diagram of a MAC PDU defined by the LTE standard; FIG. 2 is a schematic diagram of a MAC subheader defined by the LTE standard; FIG. 3 is a schematic diagram of a MAC subheader defined by the LTE standard; FIG. 4 is a short BSR and truncation defined by the LTE standard FIG. 5 is a schematic diagram of a long BSR defined by the LTE standard; FIG. 6 is a schematic diagram of Embodiment 1 reported by the LTE-A CA BSR; FIG. 7 is a schematic diagram of Embodiment 2 reported by the LTE-A CA BSR; -A schematic diagram of Embodiment 3 reported by the A CA BSR; FIG. 9 is a schematic diagram of the composition of the UE according to an embodiment of the present invention.

Preferred embodiment of the invention The basic idea of the present invention is: LTE-A CA supports at least two buffer data volume level tables (ie, BSR tables), BSR tables used by LTE systems (first data volume level table, represented by BT0), and LTE- The BSR table (second data volume rating table, indicated by BT1) used by the A system to support high data rates. The UE selects the BSR table according to the CC configuration and/or the wireless condition, and reports the BSR according to the selected BSR table.

The UE can identify the corresponding BSR table without any ambiguity by explicitly identifying the BSR MAC CE or by using a preset rule to enable the eNB to receive the BSR. Solution 1: The UE selects the BSR form according to the UL CC configuration. Specifically, it may be: when the UE is configured with one UL CC, BT0 is selected; when the UE is configured with more than one UL CC, BT1 is selected. The solution is based on the idea that when the UE is configured with only one UL CC, it cannot achieve a higher uplink data rate than the LTE Rel-8 single carrier and obtain a larger uplink grant, so the BSR can still be calculated using BT0. BT0 can also be used in the case of MIMO. When multiple UL CCs are configured, it is generally the UE's traffic demand or eNB scheduling requirements, which requires high data rate support, and may obtain a larger uplink grant. Therefore, BT1 can be used for more accurate scheduling.

Solution 2: The UE selects a BSR form according to wireless conditions. The wireless condition may refer to a downlink path loss (DL pathloss) measurement result, or a channel quality indicator (CQI) measurement result, or a power headroom report (PHR) value. (1) When the wireless condition is the downlink path loss measurement result: When the downlink path loss measurement result is higher than the preset downlink path loss measurement result threshold, the UE selects BT0; when the downlink path loss measurement result is lower than the preset downlink path loss measurement result At the threshold, the UE selects BT0. The downlink path loss measurement result may be one of the following: a downlink path loss measurement result of the DL PCC, and a minimum value or a maximum value or an average value of the downlink path loss measurement result in the DL CC associated with all UL CCs configured by the UE. The downlink path loss measurement result of the DL CC associated with any UL CC configured by the UE, and the downlink path loss measurement result of the DL CC associated with the specific UL CC. The association between the UL CC and the DL CC may be based on the SIB2 indication or the RRC indication or the downlink path loss measurement. Test or timing to measure the reference in advance.

When the UE reports the BSR, the downlink path loss measurement result may be reported at the same time.

(2) When the radio condition is the channel quality indicator (CQI) measurement result: when the CQI measurement result is lower than the preset CQI measurement result threshold, the UE selects BT0; when the CQI measurement result is higher than the preset CQI measurement result threshold, The UE selects BT1. The CQI measurement result may be one of the following: a CQI measurement result of the DL PCC, a minimum or maximum value or an average value of CQI measurement results in the DL CC associated with all UL CCs configured by the UE, and any configured by the UE The CQI measurement result of the DL CC associated with a UL CC, and the CQI measurement result of the DL CC associated with the specific UL CC. The association relationship between the UL CC and the DL CC may be based on a SIB2 indication or an RRC indication or a downlink path loss measurement reference or a timing advance measurement reference.

When the UE reports the BSR, the CQI measurement result may be reported at the same time.

(3) When the wireless condition is the power headroom report (PHR) value: When the PHR value is lower than the preset PHR threshold, the UE selects BT0; when the PHR value is higher than the preset PHR threshold, the UE selects BT1. The above PHR value is one of the following: PHR value of UL PCC, all configured by the UE

The minimum or maximum value or average value of the PHR in the UL CC, the PHR value of any one of the UL CCs configured by the UE, the PHR value of the specific UL CC, and the PHR value of the UE.

When the UE ^ reports the BSR, the PHR value can be simultaneously extracted. The solution is based on the idea that when the radio conditions are not good, it can not achieve a higher uplink data rate than the LTE Rel-8 single carrier and obtain a larger uplink grant, so the BSR can still be calculated using BT0. BT0 can also be used in the case of MIMO. When the radio conditions are good, the UE may obtain a larger uplink grant, so using BT1 can be more accurately scheduled.

Scheme 1 and Scheme 2 may be used in combination, for example, when the UE is configured with multiple CCs and the radio conditions are good, BT1 is used; otherwise, BT0 is used. Still other various possible combinations are considered to be within the scope of the present invention. When the BSR is triggered to be reported, and the uplink resource is available in at least one UL CC, the UE selects according to the selected The BTO or BT1 calculates the buffer quantity level, generates a BSR MAC CE, and reports the BSR on the UL CC with the uplink resource. The invention is further illustrated by the following specific examples. The following examples are all based on the addition of a BSR form (named BT1) to the LTE BSR form (named BT0). The description of the scenario in which more than one BSR table is added is not repeated, and can be done in a similar manner to the two forms. Both the eNB and the UE support CA and multiple BSR tables. BT0 is the BSR form of LTE; BT1 supports high data rate and can represent data between 150K and 1500K in fine-grained manner. The following table lists a possible BT1, in which the buffer size (Buffer Size, BS for short) is between 48-62 and the fine-grained data of 150K to 1500K is indicated. This table is only one possible implementation, and the present invention does not limit the use of the BSR form. When the UE triggers the BSR report, the BSR triggered here may be a Regular BSR, a Periodic BSR, or a Padding BSR, and the BSR format is selected according to the rules of the corresponding protocol.

9T

JOOO Z OAV As shown in FIG. 6, the embodiment 1 reported by the LTE-A CA BSR selects a BSR table according to the configuration of the CC. Step 601: The eNB configures a UL CC for the UE. Step 602: The BSR triggers, and the uplink resource is used for the new transmission on the configured UL CC, and the UE uses the BT0 to calculate and generate a BSR, and reports the BSR. Step 603: UE The traffic demand increases, and the eNB adds one UL CC to the UE; at this time, the UE configures two UL CCs. Step 604: The BSR triggers, and the uplink resource is used for the new transmission on the configured one of the UL CCs, and the UE calculates and generates the BSR by using the BT1, and reports the BSR. Step 605: The eNB deactivates or deletes one of the UL CCs through RRC connection reconfiguration due to coverage or load factors.

Step 606: The BSR triggers, and the uplink resource is used for the new transmission on the UL CC, and the UE calculates and generates the BSR by using the BT0, and reports the BSR. The order of the steps in this embodiment is only an implementation possibility, and there are other various order possibilities. The UE can decide which BSR table report to use according to the number of currently configured or activated UL CCs.

As shown in FIG. 7, the LTE-A CA BSR reports the second embodiment: Step 701: The UE configures two UL CCs. Step 702: The UE configures a radio condition threshold; the threshold is based on downlink path loss measurement (or CQI measurement), and the CC based on is DL PCC or all DL CCs associated with all UL CCs; Step 703: DL PCC The downlink path loss or the minimum downlink loss in all associated DL CCs is below a threshold (or the corresponding CQI measurement is higher than another threshold); Step 704: BSR triggering, at least 1 UL CC There is an uplink resource for the new transmission, and the UE generates a BSR using BT1 to report the BSR. Step 705: The UE radio condition changes, the downlink path loss of the DL PCC or the minimum downlink path loss of all the associated DL CCs is higher than a threshold (or the corresponding CQI measurement is lower than another threshold);

Step 706: The BSR triggers, and the uplink resource is used for the new transmission on the at least one UL CC, and the UE generates the BSR by using the BT0, and reports the BSR. In the foregoing steps 704 and 706, when the UE "reports the BSR, the downlink path loss measurement result or the CQI measurement result may be simultaneously reported. The order of each step in this embodiment is only an implementation possibility. There are other various order possibilities, and the UE can select which BSR table report to use according to the above-mentioned wireless conditions of the currently configured or activated UL CC.

As shown in FIG. 8, the LTE-A CA BSR reports Embodiment 3: Step 801: The UE configures 2 UL CCs. Step 102: The UE configures a radio condition threshold; the threshold is based on a PHR value, and the CC on which the UE is based is a UL PCC or all UL CCs or a designated UL CC or UE; Step 803: PHR or UL CC of the UL PCC The maximum PHR or the minimum PHR or the UE PHR is higher than the corresponding threshold. Step 804: The BSR triggers that there is an uplink resource for the new transmission on the at least one UL CC, and the UE generates the BSR by using the BT1 to report the BSR. Step 805: The UE radio condition changes, the PHR of the UL PCC or the maximum PHR or the minimum PHR or the UE PHR of the all UL CCs is less than a corresponding threshold; Step 806: The BSR triggers, and has an uplink on at least one UL CC. The resource is used for new transmission, and the UE generates a BSR using BT0 to report the BSR. When the UE reports the BSR in the above steps 804 and 806, the PHR can be reported at the same time. The order of the steps in this embodiment is only an implementation possibility, and there are other various sequential possibilities. The UE can select according to the above wireless conditions of the currently configured or activated UL CC. Which BSR form report to use.

As shown in FIG. 9, the UE in the embodiment of the present invention includes a selection module 91 and a reporting module 92, where:

The selection module 91 is configured to: select according to the configuration of the UL CC and/or wireless conditions

The BSR table is configured to report the BSR to the eNB according to the BSR table selected by the selection module 91. Preferably, the selecting module 91 is configured to: select BT0 or BT1 according to a configuration situation of the UL CC and/or a wireless condition; wherein the BT0 is a BSR table used by the LTE system, and the BT1 is used by the LTE-A system. Support for high data rate BSR forms. Preferably, the selection module 91 is configured to: when the UE is configured with one UL CC, select BT0; when the UE is configured with one or more UL CCs, select BT1. Preferably, the selection module 91 is configured to: when the wireless condition is a downlink path loss measurement result, when the downlink path loss measurement result is higher than a preset downlink path loss measurement result threshold, select BT0, when the downlink path loss measurement result BT1 is selected when the threshold of the downlink loss measurement result is lower than the preset threshold; or, when the wireless condition is the CQI measurement result, when the CQI measurement result is lower than the preset CQI measurement threshold, BT0 is selected, when the CQI measurement result When the threshold is higher than the preset CQI measurement result, BT1 is selected; or, when the wireless condition is the PHR value, when the PHR value is lower than the preset PHR threshold, BT0 is selected, and when the PHR value is higher than the preset PHR gate For a limited time, select BT 1. The downlink path loss measurement result may be one of the following: a downlink path loss measurement result of the DL PCC, and a minimum value or a maximum value or an average value of the downlink path loss measurement result in the DL CC associated with all UL CCs configured by the UE. a downlink path loss measurement result of the DL CC associated with any UL CC configured by the UE, and a downlink path loss measurement result of the DL CC associated with the specific UL CC; the CQI measurement result may be one of the following : CQI measurement result of DL PCC, minimum or maximum value or average value of CQI measurement result in DL CC associated with all UL CCs configured by the UE, CQI measurement of DL CC associated with any UL CC configured by the UE Result The CQI measurement result of the DL CC associated with the determined UL CC; the PHR value may be one of the following: a PHR value of the UL PCC, a minimum or maximum value or an average value of the PHR in all UL CCs configured by the UE The PHR value of any one of the UL CCs configured by the UE, the PHR value of the specific UL CC, and the PHR value of the UE. Preferably, the selecting module 91 is further configured to: determine, according to the indication in the SIB2 or the RRC indication or the downlink path loss measurement reference or the timing advance measurement reference, the DL CC associated with the UL CC. Preferably, the reporting module 92 is further configured to: report the downlink path loss measurement result to the eNB when the radio condition is a downlink path loss measurement result; when the radio condition is a CQI measurement result, The eNB reports the CQI measurement result; when the radio condition is a PHR value, the PHR value is sent to the eNB. Preferably, the reporting module 92 is configured to: when the BSR is triggered to be reported, and the at least one UL CC has an uplink resource, calculate a buffer size level according to the selected BSR table, generate a BSR MAC CE, and have an uplink resource. The UL CC reports the BSR.

In the above embodiment, since the eNB knows in advance the method for the UE to select the BSR table according to the rule or the configuration, it can be unambiguously knowing which BSR table the received BSR is calculated according to, so as to know how much buffer data should be followed. The amount is uplink authorized for more precise scheduling. In addition to the UE and the eNB determining based on the same rule, the type of the BSR table may be distinguished by the same or the same LCID, or the eNB may notify the UE of the type of the BSR table used according to certain conditions.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct the associated hardware, such as a read only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the foregoing embodiment may be implemented in the form of hardware, or may be implemented in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software. While the invention has been described in connection with the specific embodiments, the modifications and the modifications Such modifications and variations are considered to be within the scope of the invention and the scope of the appended claims.

INDUSTRIAL APPLICABILITY The present invention provides a method for reporting a buffer status report and a UE, which selects a BSR table according to a configuration condition of a UL CC and/or a radio condition, so that an eNB and a UE unambiguously identify a current transmission time interval (TTI). The type of BSR table used can enable the UE to obtain fine-grained and precise scheduling in the case of LTE data rate and LTE-A high data rate, which saves radio resources and improves radio resource utilization.

Claims

Claim

A method for reporting a buffer status report (BSR), comprising: a user equipment (UE) selecting a buffer data amount level table according to an uplink (UL) component carrier (CC) configuration condition and/or a wireless condition; And reporting, by the UE, to the evolved base station (eNB) according to the selected buffer data volume level table.

BSR.

2. The method according to claim 1, wherein: in the step of the UE selecting a buffer data amount level table according to a configuration condition of the UL CC and/or a wireless condition, the buffer data amount level selected by the UE The table is a first data volume ranking table or a second data volume ranking table; wherein the first data volume ranking table is a buffer data volume ranking table used by a Long Term Evolution (LTE) system, and the second data volume rating The table is a high data rate buffer data volume level table used by the Advanced Long Term Evolution (LTE-A) system.

3. The method according to claim 2, wherein: the step of the UE selecting a buffer data amount level table according to a configuration condition of the UL CC comprises: selecting the first data when the UE is configured with one UL CC The quantity level table; when the UE is configured with more than one UL CC, the second data amount level table is selected.

4. The method according to claim 2, wherein: the wireless condition is a downlink path loss measurement result; the step of the UE selecting a buffer data amount level table according to the wireless condition comprises: when the downlink path loss measurement result is higher than a preset When the downlink path loss measurement result threshold is used, the UE selects the first data volume level table; when the downlink path loss measurement result is lower than the preset downlink path loss measurement result threshold, the UE selects the second data volume level table; or, the wireless condition The channel quality indicator (CQI) measurement result; the step of the UE selecting the buffer data amount level table according to the wireless condition includes: when the CQI measurement result is lower than the preset CQI measurement result When the threshold is used, the UE selects the first data volume level table; when the CQI measurement result is higher than the preset CQI measurement result threshold, the UE selects the second data volume level table; or, the wireless condition is a power headroom report (PHR) The step of the UE selecting the buffer data volume level table according to the wireless condition includes: when the PHR value is lower than the preset PHR threshold, the UE selects the first data volume level table; when the PHR value is higher than the preset PHR threshold The UE selects a second data volume rating table.

5. The method according to claim 4, wherein: the downlink path loss measurement result is one of: a downlink path loss measurement result of a downlink (DL) primary carrier (PCC), and all UL CCs configured by the UE The minimum or maximum value or average value of the downlink path loss measurement result in the associated DL CC, the downlink path loss measurement result of the DL CC associated with any UL CC configured by the UE, and the DL CC associated with the specific UL CC Downstream path loss measurement result;

The CQI measurement result is one of the following: a CQI measurement result of the DL PCC, a minimum value or a maximum value or an average value of CQI measurement results in the DL CC associated with all UL CCs configured by the UE, and any configured by the UE CQI measurement result of DL CC associated with a UL CC, CQI measurement result of DL CC associated with a specific UL CC; the PHR value is one of the following: PHR value of UL PCC, all UL configured by UE The minimum or maximum value or average value of the PHR in the CC, the PHR value of any UL CC configured by the UE, the PHR value of the specific UL CC, and the PHR value of the UE.

6. The method according to claim 5, the method further comprising: determining according to an indication in the system information block 2 (SIB2) or a radio resource control (RRC) indication or a downlink path loss measurement reference or a timing advance measurement reference. The DL CC associated with the UL CC.

The method of claim 4, wherein: when the radio condition is a downlink path loss measurement result, the method further includes: when the UE is configured to perform a BSR, further reporting the Line loss measurement result; When the radio condition is a CQI measurement result, the method further includes: when the UE_L3⁄4 BSR, reporting the CQI measurement result to the eNB; when the radio condition is a PHR value, the method further The method further includes: when the UE reports the B SR, the PHR value is also sent to the eNB.

The method according to any one of claims 1 to 7, wherein: the step of reporting, by the UE, the BSR to the eNB according to the selected buffer data volume level table comprises: triggering reporting of the BSR, and at least one When the UL CC has an uplink resource, the UE calculates a buffer data size level according to the selected buffer data amount level table, and generates a BSR medium access control layer control element (MAC CE), and the UL CC with the uplink resource. Report the BSR.

A user equipment (UE), comprising a selection module and a reporting module, wherein: the selection module is configured to: select a buffer data amount according to an uplink (UL) component carrier (CC) configuration condition and/or a wireless condition The reporting module is configured to: report the BSR to the evolved base station (eNB) according to the buffer data volume level table selected by the selection module.

10. The UE according to claim 9, wherein: the selecting module is configured to: select a first data amount level table or a second data amount level table according to a configuration condition of the UL CC and/or a wireless condition;

The first data volume ranking table is a buffer data volume ranking table used by a Long Term Evolution (LTE) system, and the second data volume ranking table is a high data supported by an Advanced Long Term Evolution (LTE-A) system. Rate buffer data volume level table.

The UE according to claim 10, wherein: the selecting module is configured to: when the UE is configured with one UL CC, select a first data amount level table; when the UE is configured with more than one When the UL CC is selected, the second data level is selected. Table.

The UE according to claim 10, wherein: the selecting module is configured to: when the wireless condition is a downlink path loss measurement result, when the downlink path loss measurement result is higher than a preset downlink path loss measurement result threshold Selecting a first data volume level table, and selecting a second data volume level table when the downlink path loss measurement result is lower than a preset downlink path loss measurement result threshold; or, the wireless condition is a channel quality indicator (CQI) measurement result When the CQI measurement result is lower than the preset CQI measurement result threshold, the first data quantity level table is selected, and when the CQI measurement result is higher than the preset CQI measurement result threshold, the second data quantity level table is selected; or When the wireless condition is a power headroom report (PHR) value, when the PHR value is lower than a preset PHR threshold, the first data volume level table is selected, and when the PHR value is higher than the preset PHR threshold, the second is selected. Data volume rating table.

The UE according to claim 12, wherein: the downlink path loss measurement result is one of: a downlink path loss measurement result of a downlink (DL) primary carrier (PCC), and all UL CCs configured by the UE The minimum or maximum value or average value of the downlink path loss measurement result in the associated DL CC, the downlink path loss measurement result of the DL CC associated with any UL CC configured by the UE, and the DL CC associated with the specific UL CC Downstream path loss measurement result;

The UE according to claim 12, wherein: the reporting module is further configured to: when the wireless condition is a downlink path loss measurement result, The eNB reports the downlink path loss measurement result; when the radio condition is a CQI measurement result, reporting the CQI measurement result to the eNB; when the radio condition is a PHR value, reporting the information to the eNB PHR value.

The UE according to any one of claims 9 to 14, wherein: the reporting module is configured to: when triggering reporting of a BSR, and when at least one UL CC has an uplink resource, according to the selected buffer The data volume level table calculates the buffer data level, generates a BSR medium access control layer control element (MAC CE ), and reports the BSR to the UL CC with the uplink resource.