CN102104892B - Method for detecting radio link failure - Google Patents
Method for detecting radio link failure Download PDFInfo
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- CN102104892B CN102104892B CN200910254395.7A CN200910254395A CN102104892B CN 102104892 B CN102104892 B CN 102104892B CN 200910254395 A CN200910254395 A CN 200910254395A CN 102104892 B CN102104892 B CN 102104892B
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- radio link
- link failure
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- logic channel
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Abstract
The invention provides a method for detecting radio link failure, and relates to the field of communications. The method comprises the following steps of: when the retransmission times of a radio link control protocol data unit (RLC PDU) on a logic channel of user equipment (UE) achieves the preset maximum retransmission times, acquiring the priority of the logic channel by the UE; and if the priority of the logic channel is higher than the priorities of one or more logic channels in other logic channels of the UE, determining that a radio link of the UE has radio link fails.
Description
Technical field
The present invention relates to the communications field, particularly relate to a kind of method detecting Radio Link Failure (Radio LinkFailure, RLF).
Background technology
3G (Third Generation) Moblie Long Term Evolution (Long Term Evolution, LTE) system is by universal land radio access web (the Evolved Universal Terrestrial Radio Access Network of evolution, E-UTRAN), subscriber equipment (User Equipment, UE), packet-based core networks (EvolvedPacket Core, the EPC) composition of evolution.As shown in Figure 1, E-UTRAN is by base station eNB, mobile management entity (Mobility Management Entity, MME), Service Gateway (Serving-Gateway, S-GW) form, eNB is linked with MME and S-GW by S1 interface, is connected between two eNB by X2 interface.
In order to support higher air interface data speed, E-UTRAN uses OFDM (Orthogonal Frequency Division Multiple Access, OFDMA) technology as air interface technologies.The air interface protocols of E-UTRAN is divided into user face (User Plane) and chain of command (Control) two parts.User face is used for carrying user data; Chain of command function comprises wireless heterogeneous networks (Radio Resource Control, RRC) and Non-Access Stratum (Non-Access Stratum, NAS) controls.Wherein chain of command protocol stack structure as shown in Figure 2.
In order to transmit radio resource control messages between eNB and UE, needing between eNB and UE, set up RRC and connecting (RRC Connection).Correspondingly, the UE not yet setting up RRC connection is in RRC idle condition (RRC_IDLE), and the UE that built vertical RRC connects is in RRC connection status (RRC_CONNECTED).ENB carries out RRM by RRC information to the UE being in RRC_CONNECTED state, or control signal is transmitted (as beep-page message to the UE being in RRC_IDLE state, system message etc.), wherein said RRC information carries by Signaling Radio Bearer (Signaling Radio Bearer, SRB).Due to a variety of causes (as undesirable wireless propagation environment, equipment fault etc.), between eNB and UE, Radio Link Failure may be there is.Between eNB and UE when there is Radio Link Failure, UE can start RRC process of reconstruction and re-establish RRC and connect, or to move into RRC_IDLE state from RRC_CONNECTED state.
In order to support larger air interface data bandwidth, third generation Partnership Program (3rd GenerationPartnership Projects, 3GPP) propose senior Long Term Evolution (Long-Term Evolutionadvanced, LTE-Advanced or LTE-A) standard, LTE system basis adopts series of new techniques, expand from frequency domain, spatial domain, improve the availability of frequency spectrum to reach, increase the objects such as power system capacity.Wherein carrier aggregation (Carrier Aggregation, CA) technology can be polymerized two or more component carrier (Component Carrier, CC) to support wider frequency band, such as, reaches the spectrum aggregating of 100MHz.
For UE, each CC has independently mixed automatic retransfer (Hybrid-Auto RepeatreQuest, HARQ) entity, and single transmission block (Transportation Block, TB) can only transmit on a CC.ENB can dispatch UE and receives on multiple CC simultaneously or send data.For multiple CC, only exist in UE a MAC entity with.As shown in Figure 3.
In LTE system, for transmitting uplink data, UE is receiving eNB at physics Dedicated Control Channel (Physical Dedicated Control Channel, PDCCH) the upper uplink authorization (UplinkGrant sent, UL Grant) after signaling, according to the Physical Resource Block of wherein specifying (Physical ResourceBlock, PRB) the large each logical channel data of young pathbreaker (namely rlc protocol data cell RLC PacketData Unit, RLC PDU) according to priority with preferential speed (Priority Bit Rate, PBR) require to be multiplexed into MAC protocol packet, and the PRB specified at UL Grant transmits.
For eNB and UE supporting CA, the PRB resource of specifying in UL Grant may comprise the PRB resource on multiple up CC simultaneously, and therefore each logical channel data of UE is mapped in the resource of multiple up CC according to certain rule.At certain transmission time, the data on same logic channel may in one or more up CC transmitted over resources.Likely there is such situation:
Situation 1: certain RLC PDU and retransmission packet thereof are repeatedly dispatched and transmitted on a certain CC within a period of time.If the reasons such as the quality of wireless channel due to this CC is undesirable likely cause this RLCPDU to retransmit for many times unsuccessfully and reach the RLC maximum retransmission of Operation system setting.According to the RLF detection principle of LTE, UE will think and there occurs Radio Link Failure and start RRC process of reconstruction or RRC_IDLE state of moving into.But now other CC may still can normally work, UE does not need according to Radio Link Failure process;
Situation 2: transmit although certain RLC PDU and retransmission packet thereof are scheduled on different CC, but retransmit unsuccessfully on each different CC due to this RLC PDU retransmission packet of accidental reason and reach the RLC maximum retransmission of Operation system setting, thus triggering unnecessary Radio Link Failure process.
As seen from the above, cannot detect under multicarrier condition that supporting the UE of CA whether wireless link is failed, may occur causing unnecessary RRC rebuild or enter RRC_IDLE state because of error detection exactly.
Summary of the invention
The method of detection Radio Link Failure provided by the invention, accurately can detect Radio Link Failure.
To achieve the above object of the invention, the invention provides following technical scheme:
Detect a method for Radio Link Failure, comprising:
When on the logic channel of UE, wireless link control protocol data cell (RLC PDU) number of retransmissions reaches the maximum retransmission pre-set, UE side obtains the priority of described logic channel;
If the priority of described logic channel is higher than priority one or more in other logic channels of described UE, then determine that Radio Link Failure occurs described UE.
Further, described method also has following features: described method also comprises:
When determining that Radio Link Failure occurs described UE, trigger Radio Link Failure process.
Further, described method also has following features:
The rlc layer of described UE side or wireless heterogeneous networks (RRC) layer detect described UE and whether Radio Link Failure occur.
Further, described method also has following features:
When described rrc layer determines whether Radio Link Failure occurs, following information is that described rrc layer obtains from rlc layer, comprising:
On described logic channel, RLC PDU number of retransmissions reaches described maximum retransmission;
The priority of described logic channel.
Detect a method for Radio Link Failure, comprising:
When on the logic channel of UE, RLC PDU number of retransmissions reaches the maximum retransmission pre-set, start Radio Link Failure and detect timer, before described Radio Link Failure detects timer expiry, whether whole logic channels that UE detects side described UE there is RLC PDU number of retransmissions to reach described maximum retransmission;
If have RLCPDU number of retransmissions to reach the logic channel of described maximum retransmission in the time before described Radio Link Failure detects timer startup and time-out, determine that Radio Link Failure occurs described UE.
Further, described method also has following features:
The rlc layer of described UE side or rrc layer detect whether Radio Link Failure occurs.
Further, described method also has following features:
When described rrc layer determines whether Radio Link Failure occurs, following information is that described rrc layer obtains from rlc layer, comprising:
On described logic channel, the number of retransmissions of RLC PDU reaches described maximum retransmission;
In time before described Radio Link Failure detects timer startup and time-out, RLC PDU number of retransmissions reaches the logic channel of described maximum retransmission.
Further, described method also has following features: described method also comprises:
If Radio Link Failure detected, then stop described Radio Link Failure to detect timer, and trigger Radio Link Failure process.
Further, described method also has following features: described method also comprises:
If described Radio Link Failure detects timer expiry, then do not trigger Radio Link Failure process.
Further, described method also has following features:
Described Radio Link Failure detects the rlc layer or rrc layer startup and stopping that timer is UE side.
Further, described method also has following features:
The duration that described Radio Link Failure detects timer is that evolved base station (eNB) is by system message or the configuration of RRC dedicated signaling.
Technical scheme provided by the invention, when on logic channel, RLC PDU number of retransmissions reaches maximum retransmission, according to the priority of described logic channel or before RLC detects timer expiry the RLC PDU number of retransmissions of described logic channel and/or other logic channels, determine whether Radio Link Failure occurs, realize the object accurately detecting Radio Link Failure, decrease the Radio Link Failure process that rrc layer is unnecessary, save air-link resources.
Accompanying drawing explanation
Fig. 1 is LTE system structural representation;
Fig. 2 is LTE chain of command protocol stack structure schematic diagram;
Fig. 3 is the mapping relations schematic diagram of multiple CC, HARQ entity and MAC entity;
Fig. 4 is the method flow diagram detecting Radio Link Failure in embodiment one;
Fig. 5 is the method flow diagram detecting Radio Link Failure in embodiment two;
Fig. 6 is the method flow diagram detecting Radio Link Failure in embodiment three;
Fig. 7 is the method flow diagram detecting Radio Link Failure in embodiment four;
Fig. 8 is the method flow diagram detecting Radio Link Failure in embodiment five;
Fig. 9 is the method flow diagram detecting Radio Link Failure in embodiment six.
Embodiment
Below in conjunction with accompanying drawing, the technical scheme that the embodiment of the present invention provides is described further.
Embodiment one
In the present embodiment, RLC detects Radio Link Failure according to the priority of logic channel, detailed process as shown in Figure 4:
Step 101, be in affirmation mode RLC entity in RLC PDU number of retransmissions reach the maximum retransmission of Operation system setting;
Step 102, rlc layer judge that whether the priority of described RLC entity counterlogic channel is higher than priority one or more in other logic channels, if so, then perform step 103; Otherwise flow process terminates;
Other logic channels described in the present invention are jointly for same UE provides the channel of transmit data functionality with described logic channel;
Wherein refer to that the priority of this logic channel is the highest or higher relative to other logic channels higher than priority one or more in other logic channels.
To rrc layer, step 103, described rlc layer notify that in described RLC entity, RLC PDU number of retransmissions reaches maximum retransmission;
Step 104, described rrc layer start RLF handling process.
Wherein said RLF handling process comprises startup RRC process of reconstruction or RRC_IDLE state of being moved into by UE.
Embodiment two
In the present embodiment, RRC detects Radio Link Failure according to the priority of logic channel, detailed process as shown in Figure 5:
Step 201, be in affirmation mode RLC entity in RLC PDU number of retransmissions reach the maximum retransmission of Operation system setting;
To rrc layer, step 202, described RLC notify that in described RLC entity, RLC PDU number of retransmissions reaches maximum retransmission, and report the logic channel ID that described RLC entity is corresponding simultaneously;
Step 203, described RRC, according to described logic channel ID, judge that whether the priority of described logic channel is higher than priority one or more in other logic channels, if so, then perform step 204; Otherwise flow process terminates;
Step 204, described rrc layer start RLF handling process.
Embodiment three
In the present embodiment, the PLCPDU number of retransmissions that rlc layer detects other logic channels before timer expiry according to RLF detects Radio Link Failure, detailed process as shown in Figure 6:
Step 301, be in affirmation mode RLC entity in RLC PDU number of retransmissions reach the maximum retransmission of Operation system setting;
Step 302, rlc layer start RLF and detect timer;
The duration that wherein said RLF detects timer is that evolved base station (eNB) is by system message or the configuration of RRC dedicated signaling.
Wherein said RRC dedicated signaling refers to the RRC signaling issuing particular UE.
Step 303, before described RLF detects timer expiry, if there is the RLC PDU number of retransmissions in other RLC entities to reach described maximum retransmission, then perform step 304; Otherwise flow process terminates.
Other RLC entities described in the present invention are jointly for same UE provides the entity of transmit data functionality with described RLC.
Wherein RLC PDU reaches the number of the RLC entity of maximum retransmission can be one or more.
To rrc layer, step 304, described RLC notify that in described RLC, PLC PDU reaches described maximum retransmission and stops described RLF to detect timer;
Step 305, described rrc layer start RLF handling process.
Embodiment four
Detect Radio Link Failure for rlc layer according to the PLCPDU number of retransmissions that RLF detects same logic channel before timer expiry in the present embodiment to be described, detailed process as shown in Figure 7:
Step 401, the RLC PDU be in the RLC entity of affirmation mode reach maximum retransmission;
Step 402, described RLC start RLF and detect timer;
Step 403, before described RLF detects timer expiry, if RLCPDU number of retransmissions reaches maximum retransmission again in described RLC entity, then perform step 404, otherwise flow process terminates;
To rrc layer, step 404, described RLC notify that in described RLC, PLC PDU number of retransmissions reaches described maximum retransmission and stops RLF detecting timer;
Step 405, rrc layer start RLF handling process.
Embodiment five
Step 501, be in affirmation mode RLC entity in RLC PDU number of retransmissions reach maximum retransmission;
To rrc layer, step 502, rlc layer notify that described RLC reaches maximum retransmission, and report the logic channel ID that this event is corresponding simultaneously;
Step 503, described rrc layer start RLF and detect timer;
Step 504, to detect before timer expiry at RLF, if there is the RLCPDU number of retransmissions in other RLC entities to reach maximum retransmission, then perform step 505, otherwise flow process terminates;
Step 505, described RLC reach maximum retransmission to the number of retransmissions of RLC PDU in rrc layer notice other RLC entities described, and report the logic channel ID that other RLC entities described in this event are corresponding simultaneously;
Step 506, described rrc layer stop RLF detecting timer, and start RLF handling process.
Embodiment six
Detect Radio Link Failure for RRC according to the PLCPDU number of retransmissions that RLF detects other logic channels before timer expiry in the present embodiment to be described, detailed process as shown in Figure 9:
Step 601, be in affirmation mode RLC entity in RLC PDU number of retransmissions reach maximum retransmission;
To rrc layer, step 602, rlc layer notify that in described RLC, RLC PDU number of retransmissions reaches described maximum retransmission, and report the logic channel ID that described RLC entity is corresponding simultaneously;
Step 603, described rrc layer start RLF and detect timer;
If step 604 is before described RLF detects timer expiry, if RLC PDU number of retransmissions reaches described maximum retransmission again in described RLC entity, then perform step 605, otherwise flow process terminates;
To described rrc layer, step 605, described RLC notify that in described RLC, RLC PDU number of retransmissions reaches maximum retransmission again, and report the logic channel ID that described RLC entity is corresponding simultaneously;
Step 606, described rrc layer stop described RLF detect timer and start RLF handling process.
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment is that the hardware that can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, this program perform time, step comprising embodiment of the method one or a combination set of.
In addition, each functional unit in each embodiment of the present invention can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.If described integrated module using the form of software function module realize and as independently production marketing or use time, also can be stored in a computer read/write memory medium.
The above-mentioned storage medium mentioned can be read-only memory, disk or CD etc.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range described in claim.
Claims (10)
1. detect a method for Radio Link Failure, it is characterized in that, comprising:
When on the logic channel of UE, wireless link control protocol data cell RLC PDU number of retransmissions reaches the maximum retransmission pre-set, UE side obtains the priority of described logic channel;
If the priority of described logic channel is higher than priority one or more in other logic channels of described UE, then determine that Radio Link Failure occurs described UE.
2. method according to claim 1, is characterized in that, also comprises:
When determining that Radio Link Failure occurs described UE, trigger Radio Link Failure process.
3. method according to claim 1 and 2, is characterized in that, the rlc layer of described UE side or radio resource control RRC layer detect described UE and whether Radio Link Failure occur.
4. method according to claim 3, is characterized in that, when described rrc layer determines whether Radio Link Failure occurs, following information is that described rrc layer obtains from rlc layer, comprising:
On described logic channel, RLC PDU number of retransmissions reaches described maximum retransmission;
The priority of described logic channel.
5. detect a method for Radio Link Failure, it is characterized in that, comprising:
When on the logic channel of UE, RLC PDU number of retransmissions reaches the maximum retransmission pre-set, start Radio Link Failure and detect timer, before described Radio Link Failure detects timer expiry, whether whole logic channels that UE detects side described UE there is RLC PDU number of retransmissions to reach described maximum retransmission;
If have RLC PDU number of retransmissions to reach the logic channel of described maximum retransmission in the time before described Radio Link Failure detects timer startup and time-out, determine that Radio Link Failure occurs described UE;
If Radio Link Failure detected, then stop described Radio Link Failure to detect timer, and trigger Radio Link Failure process.
6. method according to claim 5, is characterized in that, the rlc layer of described UE side or rrc layer detect whether Radio Link Failure occurs.
7. method according to claim 6, is characterized in that, when described rrc layer determines whether Radio Link Failure occurs, following information is that described rrc layer obtains from rlc layer, comprising:
On described logic channel, the number of retransmissions of RLC PDU reaches described maximum retransmission;
In time before described Radio Link Failure detects timer startup and time-out, RLC PDU number of retransmissions reaches the logic channel of described maximum retransmission.
8. method according to claim 5, is characterized in that, also comprises:
If described Radio Link Failure detects timer expiry, then do not trigger Radio Link Failure process.
9. method according to claim 8, is characterized in that, described Radio Link Failure detects the rlc layer or rrc layer startup and stopping that timer is UE side.
10. method according to claim 5, is characterized in that, the duration that described Radio Link Failure detects timer is that evolved base station eNB is by system message or the configuration of RRC dedicated signaling.
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| CN200910254395.7A CN102104892B (en) | 2009-12-22 | 2009-12-22 | Method for detecting radio link failure |
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| CN200910254395.7A CN102104892B (en) | 2009-12-22 | 2009-12-22 | Method for detecting radio link failure |
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104685930B (en) | 2013-04-09 | 2019-02-19 | 华为技术有限公司 | A kind of means of communication and terminal |
| CN105873115B (en) * | 2015-01-23 | 2021-06-25 | 中兴通讯股份有限公司 | Network resource adjustment method and terminal between access technology networks |
| CN107426823B (en) * | 2016-05-23 | 2020-12-04 | 上海无线通信研究中心 | Method and system for multiplexing media access control layer |
| PL3596958T3 (en) * | 2017-03-13 | 2024-02-19 | Nokia Technologies Oy | Duplication and rlc operation in new radio access technology |
| KR102626164B1 (en) * | 2017-06-15 | 2024-01-18 | 삼성전자 주식회사 | Method and apparatus for packet transmission control |
| CN109428687B (en) * | 2017-07-21 | 2020-12-15 | 华为技术有限公司 | Method and device for triggering Radio Link Failure (RLF) |
| CN110495202B (en) * | 2017-07-24 | 2021-04-02 | Oppo广东移动通信有限公司 | Method for processing radio link failure, terminal equipment and network equipment |
| WO2019153285A1 (en) * | 2018-02-09 | 2019-08-15 | Oppo广东移动通信有限公司 | Configuration method for rlc entity, and related device |
| CN111480389B (en) * | 2018-03-22 | 2021-11-19 | Oppo广东移动通信有限公司 | Information transmission method and device and computer storage medium |
| CN110719614B (en) * | 2018-07-13 | 2021-11-05 | 普天信息技术有限公司 | Data transmission method and system |
| CN110740469B (en) * | 2018-07-18 | 2022-12-09 | 维沃移动通信有限公司 | Method for determining monitoring result and terminal |
| CN110831095B (en) * | 2018-08-11 | 2021-11-19 | 华为技术有限公司 | Communication method and communication device |
| CN111510950B (en) * | 2019-01-31 | 2021-12-17 | 大唐移动通信设备有限公司 | Transmission processing method, terminal and network equipment |
| CN114640971A (en) * | 2020-12-15 | 2022-06-17 | 维沃移动通信有限公司 | Processing method and device for sidelink transmission, terminal and network equipment |
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| US20090175175A1 (en) * | 2008-01-04 | 2009-07-09 | Interdigital Patent Holdings, Inc. | Radio link control reset using radio resource control signaling |
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