CN102577558B

CN102577558B - A kind of report method of Buffer Status Report and subscriber equipment

Info

Publication number: CN102577558B
Application number: CN201080039140.XA
Authority: CN
Inventors: 张健; 黄亚达; 施小娟
Original assignee: ZTE Corp
Current assignee: Haining Hi Tech Zone Science And Innovation Center Co Ltd
Priority date: 2010-06-29
Filing date: 2010-06-29
Publication date: 2016-03-02
Anticipated expiration: 2030-06-29
Also published as: WO2012000177A1; CN102577558A

Abstract

The invention discloses a kind of report method and subscriber equipment of Buffer Status Report, wherein, described method comprises: subscriber equipment (UE) selects buffer data quantity grade table according to the configuring condition of up (UL) component carrier (CC) and/or radio condition; Described UE reports BSR according to selected buffer data quantity grade table to evolved base station (eNB).The present invention can make eNB and UE unambiguously identify the kind of the BSR form that current transmission time interval (TTI) uses, UE can be made under LTE data rate and LTE-A high data rate situation all can to obtain fine-grained accurate scheduling, save Radio Resource, improve wireless resource utility efficiency.

Description

Method for reporting buffer status report and user equipment

Technical Field

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

Background

In an evolved universal terrestrial radio access network (E-UTRAN) of a third generation Long Term Evolution (LTE) system, uplink data is transmitted through a Physical Uplink Shared Channel (PUSCH). Uplink radio resources are allocated to each User Equipment (UE) by an evolved node b (eNB). The multiple access technology adopted by the E-UTRAN is an Orthogonal Frequency Division Multiplexing Access (OFDMA). A Radio Resource Control (RRC) layer of the LTE system sends an RRC message to establish RRC layer link between the UE and the eNB, configure system parameters, and transmit UE capability parameters. The RRC message of the downlink is sent on a Physical Downlink Shared Channel (PDSCH). Some common parameters related to the system, such as cell frequency point and cell system bandwidth, are sent by the eNB to all UEs in the cell in a broadcast message, where the broadcast message is sent on a Physical Broadcast Channel (PBCH).

In order to allocate resources and provide services for each UE according to its own requirements, so as to achieve better multiplexing performance in uplink transmission, and also in order to fully, flexibly and efficiently utilize system bandwidth, the LTE system formulates a special control message for uplink transmission resource allocation of users. The control message dedicated to resource allocation for the PUSCH is sent by the eNB to the UE, and is also called uplink grant (ul grant), and the ul grant is sent on a Physical Downlink Control Channel (PDCCH).

In order to ensure that radio resources are reasonably allocated to each UE, the LTE system requires the UE to report the status of the data volume stored in its buffer, and the report is reported to the eNB in the form of a Buffer Status Report (BSR). In an LTE system, radio interface Logical Channels (LCHs) are set with different priorities, the LCHs are divided into 4 Logical Channel Groups (LCGs), and the BSR reports information about the group number of each LCG of the UE and the amount of data to be transmitted of all the LCHs in the group.

Since the BSR is important reference information for the eNB to perform reasonable radio resource scheduling for the UE, the LTE system specifies various BSR types and transmission rules. The BSRs are classified into a regular buffer status report (regular BSR), a periodic buffer status report (PeriodicBSR), and a padding buffer status report (PaddingBSR) according to an event triggering the BSRs.

Wherein, the triggering conditions of RegularbR include:

the upper layer with high priority logic channel can transmit data arrival, and the priority is higher than the priority of the existing LCH data in the UE buffer zone;

a serving cell change;

the BSR retransmission TIMER (RETX BSR TIMER) times out and there is data in the UE buffer that can be transmitted.

The triggering conditions for the PeriodicBSR are: if the BSR cycle timer (period bsrtimer) times out, the PeriodicBSR is triggered.

The trigger conditions for PaddingBSR are: if neither regular bsr nor PeriodicBSR is to be sent, and the number of bits used for padding in the allocated uplink PUSCH resource is greater than or equal to the sum of a BSRMAC Control Element (CE) and the size of a MAC subheader (subheader) thereof, triggering PaddingBSR.

PaddingBSR is a padding BSR, complementary to RegularBSR and PeriodicBSR, which may be classified as a non-padding BSR, as opposed to a padding BSR. When the uplink does not transmit the regular bsr and the PeriodicBSR, the PaddingBSR can more timely obtain the situation of the UE buffer LCG data change for the eNB.

The regular bsr and the PeriodicBSR are both encapsulated as a mac ce in a media access control protocol data unit (mac pdu for short). Padding bsr is padded in 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 MAC pdu is shown in fig. 1, and a MAC pdu is composed of a MAC header (header), 0 or more MAC ces, 0 or more MAC Service Data Units (SDU) and optional Padding bits (Padding). The MAC header is composed of a plurality of MAC subheaders, and each MAC subheader sequentially corresponds to MACCE, MAC sdu or Padding arranged behind the MAC header according to the sequence of arrangement, as shown in fig. 2 and fig. 3. The MAC subheader of bsrmaccoe corresponds to fig. 3 and is in R/E/LCID format, where R is reserved bit and E is extension bit, indicating that there are other subheaders after the subheader. The LCID contained in the MAC sub-header is the type of the corresponding MAC ce or MAC sdu or Padding, as explained below for the uplink LCID.

According to the definition of the current LTEMAC layer protocol standard (3 gpppts36.321), PaddingBSR can only transmit using Padding bits of mac pdu.

There are two BSR formats defined by the LTE system, as shown in fig. 4 and fig. 5, the BSR format shown in fig. 4 is referred to as a short BSR format or a Truncated (Truncated) BSR format, and the BSR format shown in fig. 5 is referred to as a long BSR format. The BSR is carried by the PUSCH. When UE triggers BSR and only one LCG has data to be transmitted, the UE reports the BSR by adopting a short BSR format; when the BSR triggered by the UE is a RegularBSR or a PeriodicBSR and a plurality of LCGs have data to be transmitted, the UE reports the BSR by adopting a long BSR format; and when the BSR triggered by the UE is a PaddingBSR, a plurality of LCGs have data to be transmitted and the Padding bit length of the MACPDU is not enough to send the long BSR format, the UE reports the PaddingBSR by adopting the truncated BSR format.

In both of the above BSR formats, the BSR of a single LCG is represented by 6 bits, and the value of this 6bit is used as a sequence number (index) in a buffer data size class (bufferszevels) table of the BSR, which is specifically described as follows:

the BSR format and the transmission rule are defined in the current LTE erelease8 standard, and in order to meet the rapidly increasing requirements of various wireless services in the present and future, the next evolution standard of LTE erelease8 has also begun to enter into the formulation process, i.e., the LTE-Advanced (LTE-a) standard.

LTE-a is a standard introduced by the3rd generation partnership project (3 GPP) organization to meet the requirements of the International Telecommunications Union (ITU) Advanced international mobile telecommunications-Advanced (IMT-Advanced). The LTE-a system is an evolution version based on the LTE erelease8 system, and introduces many new technologies to meet the basic requirements of IMT-Advanced, wherein an important technology is Carrier Aggregation (CA). Due to the shortage of wireless spectrum resources, spectrum resources owned by mobile operators in the world are often scattered, and the IMT-Advanced requires a higher peak rate index (supporting 100Mbps in the case of high mobility and 1Gbps in the case of low mobility), and the bandwidth of 20MHz maximum in the current LTE standard cannot meet the IMT-Advanced requirements, so that the bandwidth needs to be extended to a higher bandwidth, for example, Frequency Division Duplex (FDD) supports 80MHz maximum, and Time Division Duplex (TDD) supports 100MHz maximum, so that the data amount that the UE can transmit is increased by several times compared with LTE. In addition to bandwidth increase, in order to achieve higher speed, Multiple Input Multiple Output (MIMO) is also a core technology for improving throughput of the LTE-a system. Considering the uplink bandwidth increase (5 times of the LTE bandwidth) and the uplink dual-stream MIMO (2 times of the LTE single stream), the uplink rate of the UE in the LTE-a system will be improved to 10 times of the LTE maximum.

In an LTE-a release 10(Rel-10) system CA, at most 5 Component Carriers (CCs) are aggregated in DownLink and/or UpLink to support a maximum transmission bandwidth of 100MHz, respectively, and a total number of UpLink (UpLink, UL) CCs is configured to be less than or equal to a total number of DownLink (DL) CCs. Each CC corresponds to a hybrid automatic repeat request (HARQ) entity and a transport channel. Each DLCC has an independent PDCCH indicating resource allocation on the CC or resource allocation on other CCs, which is classified as downlink resource allocation (dl assignment) or uplink grant (ul grant). When a CC Index (CIF) is configured, a 3-bit CIF on the PDCCH indicates component carrier identity information. The UE configures 1 downlink primary carrier (DLPCC) and 1 uplink primary carrier (ULPCC), and may configure 0 to 4 downlink secondary carriers (DLSCC, downlink secondary cc) and/or 0 to 4 uplink secondary carriers (ULSCC). The DLPCC and the ULPCC form a primary serving cell (PCell) of the UE, the PCell provides functions of security and non-access stratum mobility information (securityandsamobiliityinfo), synchronization, access, system information, paging, and the like, and the UE random access can only be performed through the PCell. Ul pcc is configured with PUCCH resources for transmitting signaling such as harq ack/NACK (acknowledgement/negative acknowledgement), Scheduling Request (SR), and Channel Quality Indicator (CQI). The DLSCC and its associated ul scc constitute a secondary serving cell (SCell) that provides higher bandwidth and data throughput as an added radio resource, and the SCell may also not contain ul scc configuration. ULPCC and DLPCC are associated by information indicated by system information block 2(SIB 2); the ul scc and DLSCC are associated with each other through SIB2 or dedicated signaling such as information indicated by RRC signaling; the ULSCC may also be associated with a reference DLCC for the DLSCC or DLPCC based on the measured downlink path loss or a reference DLCC for the measured timing advance. At any time, the UE in RRC CONNECTED (RRC _ CONNECTED) state must maintain the configuration of one DLPCC and one ULPCC. From the perspective of UE power saving and CC management, the eNB may activate/deactivate a certain DLSCC through the mac ce, and the DLPCC cannot be activated/deactivated. And the UE does not monitor the PDCCH, does not receive the PDSCH, does not perform measurement related to CQI, does not receive system information, supports measurement related to mobility, closes a baseband and/or radio frequency part module and performs corresponding RF frequency point adjustment on the DLSCC in the deactivated state. For whether the ul scc needs to support an activation/deactivation function and whether a corresponding UE behavior, such as whether to stop sending a reference signal (SRS) or PUSCH data on the corresponding ul scc, 3GPP is currently under discussion.

Disclosure of Invention

The buffer data size class table (BSR table for short) of the LTE standard can only represent data of 150K at the maximum with fine granularity, and all the other services greater than 150K belong to the same BSR level, i.e. if the BSR table of LTE is still used, the LTE-a service with high throughput will make the network unable to distinguish the buffer state of the UE between 150K and 1500K, thereby resulting in the inefficient and rational allocation of resources. Therefore, the 3GPP adds at least one new BSR table on the basis of the BSR table of LTE to meet the requirement of accurately reflecting the buffer status from 150K to 1500K under the condition of large service throughput of LTE-a. But it has not been determined how to use multiple BSR tables after the UE supports these tables.

The technical problem to be solved by the present invention is to provide a method and a user equipment for reporting a buffer status report, so as to report BSRs under the condition of multiple BSR forms.

In order to solve the above technical problem, the present invention provides a method for reporting a Buffer Status Report (BSR), including:

selecting a buffer data volume grade table by User Equipment (UE) according to the configuration condition and/or the wireless condition of an Uplink (UL) Component Carrier (CC); and

and the UE reports the BSR to an evolved node B (eNB) according to the selected buffer data volume grade table.

Preferably, in the step of selecting the buffer data size level table by the UE according to the configuration condition and/or radio condition of the ULCC, the buffer data size level table selected by the UE is the first data size level table or the second data size level table;

the first data volume grade table is a buffer data volume grade table used by a Long Term Evolution (LTE) system, and the second data volume grade table is a buffer data volume grade table supporting a high data rate used by an advanced long term evolution (LTE-A) system.

Preferably, the step of selecting, by the UE, a buffer data size level table according to the configuration condition of the ULCC includes:

selecting a first data volume level table when the UE configures 1 ULCC;

selecting a second data volume level table when the UE is configured with more than 1 ULCC.

Preferably, the wireless condition is a downlink path loss measurement result; the step that the UE selects the buffer data size grade table according to the wireless condition comprises the following steps: when the downlink path loss measurement result is higher than a preset threshold of the downlink path loss measurement result, the UE selects a first data volume grade 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 volume grade table; or,

the radio condition is a Channel Quality Indication (CQI) measurement; the step that the UE selects the buffer data size grade table according to the wireless condition comprises the following steps: when the CQI measurement result is lower than a preset CQI measurement result threshold, the UE selects a first data volume grade table; when the CQI measurement result is higher than a preset CQI measurement result threshold, the UE selects a second data volume grade table; or,

the radio condition is a Power Headroom Report (PHR) value; the step that the UE selects the buffer data size grade table according to the wireless condition comprises the following steps: when the PHR value is lower than a preset PHR threshold, the UE selects a first data volume grade table; and when the PHR value is higher than the preset PHR threshold, the UE selects a second data volume grade 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), a minimum value, a maximum value, or an average value of downlink path loss measurement results in DLCCs associated with all ULCCs configured by the UE, a downlink path loss measurement result of a DLCC associated with any ULCC configured by the UE, and a downlink path loss measurement result of a DLCC associated with a specific ULCC;

the CQI measurement is one of: the measurement result of the CQI of the DLPCC, the minimum value, the maximum value, or the average value of the measurement results of the CQIs in the DLCCs associated with all the ULCCs configured by the UE, the measurement result of the CQI of the DLCC associated with any one ULCC configured by the UE, and the measurement result of the CQI of the DLCC associated with a specific ULCC;

the PHR value is one of the following: the PHR value of the ULPCC, the minimum value, the maximum value or the average value of the PHR in all the ULCCs configured by the UE, the PHR value of any one ULCC configured by the UE, the PHR value of a specific ULCC and the PHR value of the UE.

Preferably, the method further comprises:

determining the DLCC associated with the ULCC according to an indication in a 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 UE reports BSR, the UE also reports the downlink path loss measurement result to the eNB;

when the radio condition is a CQI measurement, the method further comprises: when the UE reports BSR, the UE also reports the CQI measurement result to the eNB;

when the radio condition is a PHR value, the method further includes: and when the UE reports BSR, reporting the PHR value to the eNB.

Preferably, the step of reporting the BSR to the eNB by the UE according to the selected buffer data volume level table includes:

and when reporting the BSR is triggered and at least one ULCC has uplink resources, the UE calculates the data volume grade of the buffer according to the selected data volume grade table of the buffer, generates a BSR media access control layer control element (MACCE), and reports the BSR on the ULCC having the uplink resources.

In order to solve the above technical problem, the present invention provides a User Equipment (UE), including a selecting module and a reporting module, wherein:

the selection module is configured to: selecting a buffer data volume level table according to the configuration situation and/or the wireless condition of an Uplink (UL) Component Carrier (CC);

the reporting module is configured to: and reporting the BSR to an evolved node B (eNB) according to the buffer data volume grade table selected by the selection module.

Preferably, the selection module is configured to: selecting a first data volume grade table or a second data volume grade table according to the configuration condition and/or the wireless condition of the ULCC;

Preferably, the selection module is configured to: selecting a first data volume level table when the UE configures 1 ULCC; selecting a second data volume level table when the UE is configured with more than 1 ULCC.

Preferably, the selection module is configured to: when the wireless condition is a downlink path loss measurement result, selecting a first data volume grade table when the downlink path loss measurement result is higher than a preset downlink path loss measurement result threshold, and selecting a second data volume grade table when the downlink path loss measurement result is lower than the preset downlink path loss measurement result threshold; or when the wireless condition is a Channel Quality Indicator (CQI) measurement result, selecting a first data volume grade table when the CQI measurement result is lower than a preset CQI measurement result threshold, and selecting a second data volume grade table when the CQI measurement result is higher than the preset CQI measurement result threshold; or, when the radio condition is a Power Headroom Report (PHR) value, selecting a first data volume class table when the PHR value is lower than a preset PHR threshold, and selecting a second data volume class table when the PHR value is higher than the preset PHR threshold.

Preferably, the reporting module is further configured to: when the wireless condition is a downlink path loss measurement result, reporting the downlink path loss measurement result to the eNB; when the wireless condition is a CQI measurement result, reporting the CQI measurement result to the eNB; and when the wireless condition is a PHR value, reporting the PHR value to the eNB.

Preferably, the reporting module is configured to: and when reporting the BSR is triggered and at least one ULCC has uplink resources, calculating the data volume grade of the buffer according to the selected data volume grade table of the buffer, generating a BSR media access control layer control element (MACCE), and reporting the BSR on the ULCC having the uplink resources.

The invention is convenient to implement, and the UE can dynamically adjust the used BSR table according to the wireless condition and/or the traffic requirement so as to facilitate the eNB to carry out high-efficiency scheduling. The invention can enable the eNB and the UE to unambiguously identify the type of the BSR table used by the current Transmission Time Interval (TTI), and can enable the UE to obtain fine-grained accurate scheduling under the conditions of LTE data rate and LTE-A high data rate, thereby saving wireless resources and improving the utilization rate of the wireless resources.

Brief description of the drawings

Figure 1 is a diagram of mac pdus defined by the LTE standard;

fig. 2 is a diagram of a MAC subheader defined by the LTE standard;

FIG. 3 is a diagram of a MAC subheader defined by the LTE standard;

fig. 4 is a schematic diagram of a short BSR and a truncated BSR 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 an LTE-ACABR report in embodiment 1;

FIG. 7 is a diagram of an LTE-ACABR report embodiment 2;

FIG. 8 is a diagram of LTE-ACABR reporting in embodiment 3;

fig. 9 is a schematic diagram of a UE according to an embodiment of the present invention.

Preferred embodiments of the invention

The basic concept of the invention is as follows: the LTE-ACA supports at least two buffer data volume class tables (i.e., BSR tables), a BSR table (a first data volume class table, denoted by BT0) used by the LTE system, and a BSR table (a second data volume class table, denoted by BT1) supporting a high data rate, which is used for the LTE-a system. And the UE selects a BSR form according to the CC configuration condition and/or the wireless condition and reports the BSR according to the selected BSR form.

The UE may enable the eNB to unambiguously identify the corresponding BSR table after receiving the BSR through explicit identification in the bsrmaccoe or through a preset rule.

The first scheme is as follows: and the UE selects a BSR table according to the ULCC configuration condition.

Specifically, it may be: when the UE configures 1 ULCC, BT0 is selected; BT1 was selected when the UE configured more than 1 ULCC.

The scheme is based on the idea that: when the UE is configured with only one ULCC, a higher uplink data rate and a larger uplink grant than those in the lte rel-8 single carrier case cannot be achieved, and therefore the BSR can still be calculated using BT 0. BT0 may also be used in the MIMO case. When multiple ULCCs are configured, typically UE traffic requirements or eNB scheduling requirements requiring high data rate support, larger uplink grants may be obtained and thus more accurate scheduling may be obtained using BT 1.

Scheme II: the UE selects a BSR table according to radio conditions.

The radio condition may refer to a downlink loss (DLpathloss) measurement result, or a Channel Quality Indicator (CQI) measurement result, or a Power Headroom Report (PHR) value.

(1) 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 UE selects BT 0; and when the downlink path loss measurement result is lower than a preset downlink path loss measurement result threshold, the UE selects BT 0.

The downlink path loss measurement result may be one of the following: the measurement result of the downlink path loss of the DLPCC, the minimum value, the maximum value or the average value of the measurement results of the downlink path loss in the DLCCs associated with all the ULCCs configured by the UE, the measurement result of the downlink path loss of the DLCC associated with any one ULCC configured by the UE, and the measurement result of the downlink path loss of the DLCC associated with the specific ULCC. The association between the ULCC and the DLCC may be based on SIB2 indication or RRC indication or downlink loss measurement reference or timing advance measurement reference.

And when the UE reports the BSR, the UE can report the downlink path loss measurement result at the same time.

(2) When the radio condition is a Channel Quality Indication (CQI) measurement: when the CQI measurement result is lower than a preset CQI measurement result threshold, the UE selects BT 0; when the CQI measurement is higher than a preset CQI measurement threshold, the UE selects BT 1.

The CQI measurement may be one of: the CQI measurement result of the DLPCC, the minimum value, the maximum value, or the average value of the CQI measurement results in the DLCCs associated with all the ULCCs configured by the UE, the CQI measurement result of the DLCC associated with any one ULCC configured by the UE, and the CQI measurement result of the DLCC associated with a specific ULCC. The association between the ULCC and the DLCC may be based on SIB2 indication or RRC indication or downlink loss measurement reference or timing advance measurement reference.

And when the UE reports the BSR, the CQI measurement result can be reported simultaneously.

(3) When the radio condition is a Power Headroom Report (PHR) value: when the PHR value is lower than a preset PHR threshold, the UE selects BT 0; when the PHR value is higher than the preset PHR threshold, the UE selects BT 1.

And when the UE reports the BSR, the PHR value can be reported at the same time.

The scheme is based on the idea that when the wireless condition is not good, higher uplink data rate and larger uplink authorization can not be achieved under the condition of being larger than the LTEREl-8 single carrier, so that the BSR can still be calculated by using BT 0. BT0 may also be used in the MIMO case. When radio conditions are good, the UE may get a larger uplink grant and thus may get more accurate scheduling using BT 1.

Scheme one and scheme two can 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 combinations are contemplated as being within the scope of the present invention.

And when the report of the BSR is triggered and at least one ULCC has uplink resources, the UE calculates the number grade of the buffer area according to the selected BT0 or BT1 to generate BSRMACCE, and reports the BSR on the ULCC having the uplink resources.

The invention is further illustrated by the following specific examples.

The following examples are all exemplified by adding a new BSR table (named BT1) on the basis of the LTEBSR table (named BT 0). The description of the scenario of adding more than one BSR table is not repeated, and the scenario can be completed in a similar manner by using 2 tables. Both the eNB and the UE support CA and various BSR tables. BT0 is BSR table of LTE; BT1 supports high data rates, representing data between 150K and 1500K at fine granularity. The following table lists one possible BT1, where fine granularity among Buffer Size (BS) classes 48-62 indicates buffer data of around 150K to 1500K. This table is only one possible implementation and the present invention does not limit the necessity to use this BSR table. When the UE triggers BSR reporting, the triggered BSR may be a RegularBSR, a PeriodicBSR or a PaddingBSR, and BSR format selection is performed according to rules of a corresponding protocol.

As shown in fig. 6, embodiment 1 of LTE-ACABSR reporting:

and the UE selects a BSR table according to the configuration condition of the CC.

Step 601: the eNB configures one ULCC for the UE;

step 602: triggering BSR, wherein uplink resources are used for new transmission on the configured ULCC, the UE calculates and generates the BSR by using BT0, and reports the BSR;

step 603: the UE traffic demand increases, and the eNB increases one ULCC for the UE; the UE is now configured with two ULCCs.

Step 604: triggering the BSR, wherein uplink resources are used for new transmission on one configured ULCC, and the UE calculates and generates the BSR by using the BT1 and reports the BSR.

Step 605: due to coverage or loading factors, the eNB deactivates or deletes 1 of them by RRC connection reconfiguration.

Step 606: triggering BSR, wherein uplink resources are used for new transmission on ULCC, and the UE calculates and generates BSR by using BT0 and reports the BSR.

The order of the steps in this embodiment is just one implementation possibility, and there are other possibilities in various orders, and the UE may decide which BSR table report to use according to the number of currently configured or activated ULCCs.

As shown in fig. 7, for LTE-ACABSR reporting example 2:

step 701: the UE is configured with 2 ULCCs.

Step 702: UE configures a wireless condition threshold value; the threshold value is based on downlink path loss measurement (or CQI measurement), and the CC based on the threshold value is all DLCCs associated with DLPCC or all ULCCs;

step 703: a downlink path loss of the DLPCC or a minimum downlink path loss of all the associated DLCCs is lower than a threshold (or a corresponding CQI measurement is higher than another threshold);

step 704: triggering BSR, wherein uplink resources are used for new transmission on at least 1 ULCC, and the UE uses BT1 to generate BSR and reports the BSR.

Step 705: UE radio condition changes, downlink path loss of the DLPCC or minimum downlink path loss among all the associated DLCCs is higher than a threshold (or corresponding CQI measurement is lower than another threshold);

step 706: triggering BSR, wherein uplink resources are used for new transmission on at least 1 ULCC, and the UE uses BT0 to generate BSR and reports the BSR.

In step 704 and step 706, when the UE reports the BSR, the UE may report the downlink path loss measurement result or the CQI measurement result at the same time.

The order of the steps in this embodiment is just one implementation possibility, and there are other possibilities in various orders, and the UE may select which BSR table report to use according to the above-mentioned radio conditions of the currently configured or activated ul cc.

As shown in fig. 8, for LTE-ACABSR reporting embodiment 3:

step 801: the UE is configured with 2 ULCCs.

Step 102: UE configures a wireless condition threshold value; the threshold value is based on the PHR value, and the CC based on the PHR value is ULPCC or all ULCCs or the designated ULCC or UE;

step 803: the maximum PHR or the minimum PHR or UEPHR in the PHR or ULCC of the ULPCC is higher than the corresponding threshold value;

step 804: triggering BSR, wherein uplink resources are used for new transmission on at least 1 ULCC, and the UE uses BT1 to generate BSR and reports the BSR.

Step 805: UE wireless condition changes, and the PHR of the ULPCC or the maximum PHR or the minimum PHR or the UEPHR in all the ULCCs is smaller than a corresponding threshold value;

step 806: triggering BSR, wherein uplink resources are used for new transmission on at least 1 ULCC, and the UE uses BT0 to generate BSR and reports the BSR.

When the UE reports the BSR in steps 804 and 806, the PHR may be reported at the same time.

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

the selection module 91 is arranged to: selecting a BSR table according to the configuration condition and/or the wireless condition of the ULCC;

the reporting module 92 is configured to: and reporting the BSR to the eNB according to the BSR form selected by the selection module 91.

Preferably, the selection module 91 is configured to: selecting BT0 or BT1 according to the configuration condition and/or wireless condition of ULCC; the BT0 is a BSR table used by an LTE system, and the BT1 is a BSR table used by an LTE-A system and supporting high data rate.

Preferably, the selection module 91 is configured to: selecting BT0 when the UE configures 1 ULCC; when the UE is configured with more than 1 ULCC, BT1 is selected.

Preferably, the selection module 91 is configured to: when the wireless condition is a downlink path loss measurement result, selecting BT0 when the downlink path loss measurement result is higher than a preset downlink path loss measurement result threshold, and selecting BT1 when the downlink path loss measurement result is lower than the preset downlink path loss measurement result threshold; or when the wireless condition is a CQI measurement result, selecting BT0 when the CQI measurement result is lower than a preset threshold of the CQI measurement result, and selecting BT1 when the CQI measurement result is higher than the preset threshold of the CQI measurement result; or when the wireless condition is a PHR value, selecting BT0 when the PHR value is lower than a preset PHR threshold, and selecting BT1 when the PHR value is higher than the preset PHR threshold.

The downlink path loss measurement result may be one of the following: a downlink path loss measurement result of the DLPCC, a minimum value, a maximum value or an average value of downlink path loss measurement results in the DLCCs associated with all the ULCCs configured by the UE, a downlink path loss measurement result of the DLCC associated with any one ULCC configured by the UE, and a downlink path loss measurement result of the DLCC associated with a specific ULCC;

the CQI measurement may be one of: the measurement result of the CQI of the DLPCC, the minimum value, the maximum value, or the average value of the measurement results of the CQIs in the DLCCs associated with all the ULCCs configured by the UE, the measurement result of the CQI of the DLCC associated with any one ULCC configured by the UE, and the measurement result of the CQI of the DLCC associated with a specific ULCC;

the PHR value may be one of: the PHR value of the ULPCC, the minimum value, the maximum value or the average value of the PHR in all the ULCCs configured by the UE, the PHR value of any one ULCC configured by the UE, the PHR value of a specific ULCC and the PHR value of the UE.

Preferably, the selection module 91 is further configured to: and determining the DLCC associated with the ULCC according to the indication or RRC indication or downlink path loss measurement reference or timing advance measurement reference in the SIB 2.

Preferably, the reporting module 92 is further configured to: when the wireless condition is a downlink path loss measurement result, reporting the downlink path loss measurement result to the eNB; when the wireless condition is a CQI measurement result, reporting the CQI measurement result to the eNB; and when the wireless condition is a PHR value, reporting the PHR value to the eNB.

Preferably, the reporting module 92 is configured to: and when reporting BSR is triggered and uplink resources exist in at least one ULCC, calculating the size level of the buffer according to the selected BSR table to generate BSRMACCE, and reporting the BSR on the ULCC with the uplink resources.

In the above embodiment, since the eNB knows the method for the UE to select the BSR table in advance according to the rule or the configuration, it can know unambiguously which BSR table the received BSR is calculated according to, and thus know how much buffer data amount the uplink grant should be performed according to, so as to perform more accurate scheduling. Except that the UE and the eNB perform the determination based on the same rule, the UE may also use a flag bit in the MAC sub-header of the bsrmaccoe or use different LCIDs to distinguish the BSR table types, or the eNB may notify the UE of the BSR table types according to a certain condition.

It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing the relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a magnetic or optical disk, and the like. Alternatively, all or part of the steps of the above embodiments may be implemented using one or more integrated circuits. Accordingly, each module/unit in the above embodiments may be implemented in the form of hardware, and may also be implemented in the form of a software functional module. The present invention is not limited to any specific form of combination of hardware and software.

While the invention has been described in conjunction with specific embodiments, it is evident to those skilled in the art that modifications and variations can be made without departing from the spirit or scope of the invention. Such modifications and variations are considered to be within the purview and scope of the invention and the appended claims.

Industrial applicability

The invention provides a method for reporting a buffer status report and UE (user equipment). the UE selects a BSR table according to the configuration condition and/or wireless condition of ULCC (ul cell carrier), so that an eNB (evolved node B) and the UE can unambiguously identify the type of the BSR table used by the current Transmission Time Interval (TTI), the UE can be accurately scheduled with fine granularity under the conditions of LTE (long term evolution) data rate and LTE-A (long term evolution-advanced) high data rate, wireless resources are saved, and the utilization rate of the wireless resources is improved.

Claims

1. A method for reporting a Buffer Status Report (BSR) comprises the following steps:

selecting a buffer data volume grade table by User Equipment (UE) according to the configuration condition of an uplink Component Carrier (CC) and the wireless condition, or selecting the buffer data volume grade table by the User Equipment (UE) according to the wireless condition; and

the UE reports BSR to an evolved node B eNB according to the selected buffer data volume grade table;

wherein the radio conditions include: a downlink path loss measurement result, a Channel Quality Indicator (CQI) measurement result or a Power Headroom Report (PHR) value;

when the radio condition is a downlink path loss measurement result, the step that the UE selects the buffer data volume grade table according to the radio condition comprises the following steps: when the downlink path loss measurement result is higher than a preset threshold of the downlink path loss measurement result, the UE selects a first data volume grade 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 volume grade table;

when the radio condition is a Channel Quality Indicator (CQI) measurement result, the step that the UE selects the buffer data volume grade table according to the radio condition comprises the following steps: when the CQI measurement result is lower than a preset CQI measurement result threshold, the UE selects a first data volume grade table; when the CQI measurement result is higher than a preset CQI measurement result threshold, the UE selects a second data volume grade table;

when the radio condition is a Power Headroom Report (PHR) value, the step that the UE selects the buffer data volume grade table according to the radio condition comprises the following steps: when the PHR value is lower than a preset PHR threshold, the UE selects a first data volume grade table; and when the PHR value is higher than the preset PHR threshold, the UE selects a second data volume grade table.

2. The method of claim 1, wherein:

the first data volume grade table is a buffer data volume grade table used by a Long Term Evolution (LTE) system, and the second data volume grade table is a buffer data volume grade table supporting a high data rate used by a long term evolution advanced (LTE-A) system.

3. The method of claim 2, wherein:

the step that the UE selects the buffer data size grade table according to the configuration condition of the ULCC comprises the following steps:

selecting a first data volume level table when the UE configures 1 ULCC;

selecting a second data volume level table when the UE is configured with more than 2 ULCCs.

4. The method of claim 1, wherein:

the downlink path loss measurement result is one of the following: a downlink path loss measurement result of the downlink DL primary carrier PCC, a minimum value, a maximum value, or an average value of downlink path loss measurement results in DLCCs associated with all ULCCs configured by the UE, a downlink path loss measurement result of a DLCC associated with any ULCC configured by the UE, and a downlink path loss measurement result of a DLCC associated with a specific ULCC;

5. The method of claim 4, further comprising:

and determining the DLCC associated with the ULCC according to the indication in the system information block 2SIB2 or the radio resource control RRC indication or the downlink path loss measurement reference or the timing advance measurement reference.

6. The method of claim 1, wherein:

when the radio condition is a downlink path loss measurement result, the method further includes: when the UE reports BSR, the UE also reports the downlink path loss measurement result to the eNB;

7. The method of any one of claims 1 to 6, wherein:

the step of reporting the BSR to the eNB by the UE according to the selected buffer data volume level table comprises the following steps:

and when reporting the BSR is triggered and at least one ULCC has uplink resources, the UE calculates the data volume grade of the buffer according to the selected data volume grade table of the buffer, generates a control element MACCE of a BSR media access control layer and reports the BSR on the ULCC having the uplink resources.

8. A User Equipment (UE) comprises a selection module and a reporting module, wherein:

the selection module is configured to: selecting a buffer data volume grade table according to the configuration condition of the uplink UL Component Carrier (CC) and the radio condition, or selecting the buffer data volume grade table according to the radio condition, wherein the radio condition comprises: a downlink path loss measurement result, a Channel Quality Indicator (CQI) measurement result or a Power Headroom Report (PHR) value;

the reporting module is configured to: reporting BSR to an evolution type base station eNB according to the buffer area data volume grade table selected by the selection module;

the selection module is configured to: when the wireless condition is a downlink path loss measurement result, selecting a first data volume grade table when the downlink path loss measurement result is higher than a preset downlink path loss measurement result threshold, and selecting a second data volume grade table when the downlink path loss measurement result is lower than the preset downlink path loss measurement result threshold; when the wireless condition is a Channel Quality Indicator (CQI) measuring result, selecting a first data volume grade table when the CQI measuring result is lower than a preset CQI measuring result threshold, and selecting a second data volume grade table when the CQI measuring result is higher than the preset CQI measuring result threshold; and when the wireless condition is a Power Headroom Report (PHR) value, selecting a first data volume grade table when the PHR value is lower than a preset PHR threshold, and selecting a second data volume grade table when the PHR value is higher than the preset PHR threshold.

9. The UE of claim 8, wherein:

10. The UE of claim 9, wherein:

the selection module is configured to: selecting a first data volume level table when the UE configures 1 ULCC; selecting a second data volume level table when the UE is configured with more than 2 ULCCs.

11. The UE of claim 8, wherein:

12. The UE of claim 1, wherein:

the reporting module is further configured to: when the wireless condition is a downlink path loss measurement result, reporting the downlink path loss measurement result to the eNB; when the wireless condition is a CQI measurement result, reporting the CQI measurement result to the eNB; and when the wireless condition is a PHR value, reporting the PHR value to the eNB.

13. The UE of any of claims 8-12, wherein:

the reporting module is set as follows: and when reporting the BSR is triggered and at least one ULCC has uplink resources, calculating the data volume grade of the buffer according to the selected data volume grade table of the buffer, generating a media access control element (MACCE) of the BSR, and reporting the BSR on the ULCC having the uplink resources.