CN108616874B - RRC reconstruction optimization method - Google Patents
RRC reconstruction optimization method Download PDFInfo
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- CN108616874B CN108616874B CN201611190010.1A CN201611190010A CN108616874B CN 108616874 B CN108616874 B CN 108616874B CN 201611190010 A CN201611190010 A CN 201611190010A CN 108616874 B CN108616874 B CN 108616874B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
- H04W8/24—Transfer of terminal data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
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Abstract
The application discloses a Radio Resource Control (RRC) reestablishment optimization method, which comprises the following steps: newly adding an RRC reestablishment contention resolution timer, wherein the maximum value of the RRC reestablishment contention resolution timer is greater than that of the contention resolution timer; and the network side identifies the capability of the UE, uses the RRC reestablishment contention resolution timer to reestablish the RRC for the UE supporting the RRC reestablishment contention resolution timer, and uses the contention resolution timer to reestablish the RRC for the UE not supporting the RRC reestablishment contention resolution timer. By applying the technical scheme disclosed by the application, the call drop rate can be reduced, the RRC reconstruction success rate can be improved, and particularly, the gain is obvious in a scene that microwave transmission is used at an S1/X2 port on the system side.
Description
Technical Field
The present application relates to the field of mobile communications technologies, and in particular, to an RRC reestablishment optimization method.
Background
In the current 3GPP protocol, a contention resolution timer used in a random access procedure in a Radio Resource Control (RRC) reestablishment procedure is defined by a protocol as well as other contention-based random access contention resolution timers, and the values are as follows:
mac-ContentionResolutionTimer ENUMERATED{sf8,sf16,sf24,sf32,sf40,sf48,sf56,sf64}
the description of mac-ContentionResolutionTimer in 3GPP TS 36.321[6] is: contention resolution timer, values in subframes, value sf8 corresponding to 8 subframes, sf16 corresponding to 16 subframes, and so on.
According to the protocol, the maximum value of the random access contention resolution timer in the RRC reestablishment process is 64ms, which requires that in the reestablishment process, the UE and the network side initiate a random access process from the UE and send MSG1 to the network side, and perform radio and transmission resource allocation for the terminal to the network side, and then the MSG4 including the contention resolution identity MAC control unit and the reestablishment message is received by the UE is less than 64 ms. The network side may not issue the reestablishment message within 64ms due to various reasons, which may cause the contention resolution timer to time out and the reestablishment to fail.
The reason for the reconstruction failure may be that the reconstruction processing time is long due to an internal abnormality on the network side, and the transmission time for reconstructing the relevant message by using a microwave transmission scene at the S1 port or the X2 port is too long. The maximum value of the contention resolution timer specified by the protocol is 64ms, and the contention resolution timer cannot be expanded.
Disclosure of Invention
The application provides an RRC reestablishment optimization method to improve the success rate of RRC reestablishment.
The application provides a Radio Resource Control (RRC) reestablishment optimization method, which comprises the following steps:
newly adding an RRC reestablishment contention resolution timer, wherein the maximum value of the RRC reestablishment contention resolution timer is greater than that of the contention resolution timer;
and the network side identifies the capability of the UE, uses the RRC reestablishment contention resolution timer to reestablish the RRC for the UE supporting the RRC reestablishment contention resolution timer, and uses the contention resolution timer to reestablish the RRC for the UE not supporting the RRC reestablishment contention resolution timer.
Preferably, the newly added RRC reestablishment contention resolution timer includes: and newly adding RRC reestablishment competition resolving timer information element in the system information block.
Preferably, the network side identifying the UE capability includes:
a network side sends a system information block to UE through a system message, wherein the system information block carries the time length of a RRC reestablishment contention resolution timer;
the network side sends a UE capability query message to the UE;
a network side receives UE Capability information UECapabilityinformation fed back by UE, wherein a Capability indication supporting RRC reestablishment competition resolving timer is added in the UE-EUTRA-Capability information cell;
and the network side acquires whether the UE supports the RRC reestablishment contention resolution timer capability or not according to the RRC reestablishment contention resolution timer capability support indication.
Preferably, the value of the RRC reestablishment contention resolution timer includes: sf8, sf16, sf24, sf32, sf40, sf48, sf56, sf64, sf128, sf256, sf512, sf1024, wherein:
the value sf8 corresponds to 8 subframes;
the value sf16 corresponds to 16 subframes;
the value sf24 corresponds to 24 subframes;
the value sf32 corresponds to 32 subframes;
the value sf40 corresponds to 40 subframes;
the value sf48 corresponds to 48 subframes;
the value sf56 corresponds to 56 subframes;
the value sf64 corresponds to 64 subframes;
the value sf128 corresponds to 128 subframes;
the value sf256 corresponds to 256 subframes;
the value sf512 corresponds to 512 subframes;
the value sf1024 corresponds to 1024 subframes.
According to the technical scheme, the RRC reestablishment optimization method solves the timer parameter through newly adding the RRC reestablishment competition, can reduce the call drop rate, greatly improves the RRC reestablishment success rate, and particularly has obvious gain for a scene that a system side S1/X2 port uses microwave transmission.
Drawings
Fig. 1 is a schematic processing flow diagram after the UE acquires the RRC reestablishment contention resolution timer parameter from the system message including the system information block according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below by referring to the accompanying drawings and examples.
The invention adds RRC reestablishment competition resolving timer parameter (mac-contentionResolutiontimer-RrcConnectionReestab) on the network side, the value of the parameter is increased by 128ms, 256ms, 512ms and 1024ms on the basis of the value of the existing competition resolving timer, and the parameter is broadcasted to UE in the air interface. The network side identifies the UE capability, uses the RRC reestablishment contention resolution timer mac-contentResolutionTimer-RrcConnectionReestab for the UE supporting the RRC reestablishment contention resolution timer, and still uses the mac-contentResolutionTimer for the UE not supporting the RRC reestablishment contention resolution timer, thereby ensuring the compatibility.
The technical solution of the present application is described in detail by a preferred embodiment.
One, newly added cell
An RRC reestablishment contention resolution timer information element is newly added in a System Information Block (SIB). Preferably, a contention resolution timer information element may be added in the SIB2 as follows:
sf128, sf256, sf512, sf1024 are added compared to the existing contention resolution timer, where the value sf128 corresponds to 128 subframes, the value sf256 corresponds to 256 subframes, the value sf512 corresponds to 512 subframes, and the value sf1024 corresponds to 1024 subframes.
An indication for supporting RRC reestablishment contention resolution timer Capability is newly added in a UE-EUTRA-Capability (user equipment universal mobile telecommunications system terrestrial radio access Capability) cell, and is shown as the following slashed line part:
second, the processing flow
Fig. 1 is a schematic processing flow diagram after the UE acquires an RRC reestablishment contention resolution timer parameter (mac-contentresolutiontimer-rcconnectionrequest) from a system message including a system information block, where the processing flow includes:
Step 103: after the EUTRAN sends a UE capability query message (UE capability inquiry) to the UE, the UE capability information (UE capability information) is received, and it is known whether the UE supports RRC reestablishment of the contention resolution timer capability.
Step 108: after receiving the message, EUTRAN prepares for reconstructing resources such as wireless and transmission required, if EUTRAN configures the duration of a RRC reestablishment contention resolution timer and the UE supports the RRC reestablishment contention resolution timer according to the extendedcondationresolution-r 13 indication of the UE capability, then the UE sends RRCConnectionReestablisture to the UE within the duration of the RRC reestablishment contention resolution timer.
Description related to related messages in fig. 1:
systeminformation is filed in 3GPP protocol 36.3315.2.2;
RRCConnectionReestablistenergeRequest/RRCConnectionReestablistment see 3GPP protocol 36.3315.3.7;
the uecapabilitynequery/UECapabilityInformation is referred to the protocol 36.3315.6.3.
By adopting the technical scheme provided by the application, the success rate of RRC reconstruction is greatly improved, and particularly, the gain is obvious in a scene that a system side S1/X2 port uses microwave transmission.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.
Claims (2)
1. A Radio Resource Control (RRC) reestablishment optimization method is characterized by comprising the following steps:
newly adding an RRC reestablishment contention resolution timer, wherein the maximum value of the RRC reestablishment contention resolution timer is greater than that of the contention resolution timer mac-contentionResolutiontimer;
the network side identifies the UE capability, uses the RRC reestablishment contention resolution timer to reestablish the RRC for the UE supporting the RRC reestablishment contention resolution timer, and uses the contention resolution timer mac-contentionResolutiontimer to reestablish the RRC for the UE not supporting the RRC reestablishment contention resolution timer;
the newly added RRC reestablishment contention resolution timer comprises: newly adding RRC reestablishment competition resolving timer information element in the system information block;
the network side recognizing the UE capability comprises the following steps:
a network side sends a system information block to UE through a system message, wherein the system information block carries the time length of a RRC reestablishment contention resolution timer;
the network side sends a UE capability query message to the UE;
a network side receives UE Capability information UECapabilityinformation fed back by UE, wherein a Capability indication supporting RRC reestablishment contention resolution timer is added in a UE-EUTRA-Capability cell in the UECapabilityinformation;
and the network side acquires whether the UE supports the RRC reestablishment contention resolution timer capability or not according to the RRC reestablishment contention resolution timer capability support indication.
2. The method of claim 1, wherein:
the value of the RRC reestablishment contention resolution timer includes: sf8, sf16, sf24, sf32, sf40, sf48, sf56, sf64, sf128, sf256, sf512, sf1024, wherein:
the value sf8 corresponds to 8 subframes;
the value sf16 corresponds to 16 subframes;
the value sf24 corresponds to 24 subframes;
the value sf32 corresponds to 32 subframes;
the value sf40 corresponds to 40 subframes;
the value sf48 corresponds to 48 subframes;
the value sf56 corresponds to 56 subframes;
the value sf64 corresponds to 64 subframes;
the value sf128 corresponds to 128 subframes;
the value sf256 corresponds to 256 subframes;
the value sf512 corresponds to 512 subframes;
the value sf1024 corresponds to 1024 subframes.
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| CN201611190010.1A CN108616874B (en) | 2016-12-21 | 2016-12-21 | RRC reconstruction optimization method |
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| CN201611190010.1A CN108616874B (en) | 2016-12-21 | 2016-12-21 | RRC reconstruction optimization method |
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| CN108616874B true CN108616874B (en) | 2021-05-14 |
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| CN102448181B (en) * | 2010-09-30 | 2016-04-06 | 重庆重邮信科通信技术有限公司 | TDD-LTE system contention resolved accidental access method |
| CN103580777B (en) * | 2012-07-20 | 2018-03-23 | 中兴通讯股份有限公司 | User equipment auxiliary information control method, device and system |
| DE112013000242B4 (en) * | 2012-10-28 | 2019-10-17 | Lg Electronics Inc. | Operation with different timers in a wireless communication system |
| CN104581925B (en) * | 2013-10-29 | 2019-01-08 | 电信科学技术研究院 | A kind of timed maintenance method and device under coverage enhancement mechanism |
| CN104159319A (en) * | 2014-08-26 | 2014-11-19 | 大唐移动通信设备有限公司 | Method of transmitting competition solution information and base station |
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