CN102843706A - Method, device and system for optimizing RACH (Random Access Channel) configuration parameters - Google Patents
Method, device and system for optimizing RACH (Random Access Channel) configuration parameters Download PDFInfo
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- CN102843706A CN102843706A CN2011101700233A CN201110170023A CN102843706A CN 102843706 A CN102843706 A CN 102843706A CN 2011101700233 A CN2011101700233 A CN 2011101700233A CN 201110170023 A CN201110170023 A CN 201110170023A CN 102843706 A CN102843706 A CN 102843706A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/002—Transmission of channel access control information
- H04W74/008—Transmission of channel access control information with additional processing of random access related information at receiving side
Abstract
The invention discloses a method, a device and a system for optimizing RACH (Random Access Channel) configuration parameters, which are used for optimizing the RACH configuration parameters of a cell accurately. UE (User Equipment) disclosed by the invention reports the measured accurate random access delay information to an eNB (Evolved Node B) through signaling of a standard Uu interface, so that a sufficient basis for the eNB to decide whether to carry out the RACH optimized decision and implementation is provided, further, the optimization of the RACH configuration parameters of the cell can be more accurately realized, and the network performance can be improved.
Description
Technical field
The present invention relates to wireless communication system, relate in particular to a kind of Long Term Evolution (Long Term Evolution, LTE) RACH (Random Access Channel, RACH) configuration parameter optimization method, Apparatus and system under the framework.
Background technology
Wireless communication system obtains increasing deployment and application with its open network architecture, and along with popularizing of wireless communication system, the unreasonable meeting of RACH parameter configuration brings negative effect to user experience in the communication system.The unreasonable meeting of RACH parameter configuration causes following problem: the RACH resource contention can cause that delay in call establishment is big, switching delay is big, the call setup success rate is low, handover success rate is low etc.For covering and the capacity that promotes long evolving system, and the experience that promotes the user, need the RACH configuration parameter of sub-district in the network be optimized, make the access disposal ability at random of system and performance reach optimum.
The important evidence whether the RACH configuration parameter of sub-district is optimized is exactly the access delay at random of UE in the sub-district, if in the sub-district subscriber equipment (User Equipment, UE) access delay is excessive at random, then influences user experience certainly.Under the actual conditions; (Evolved NodeB eNB) is difficult to the accurately access delay at random of assessment UE, for example in evolution base station/base station; After the leading number that UE sends its random access procedure is reported to eNB; Because should beginning to send random access guiding from UE, complete random access procedure receives that up to UE competition solves ID and finishes dealing with, and this time, eNB only can't accurate Calculation according to the leading transmission number of times of UE.Same, access delay itself is exactly a Millisecond at random, if to the assessment errors of this time delay also at Millisecond, then can bring uncertainty to the RACH Parameter Optimization.
According to top description, can accurately obtain the access delay at random of UE, directly the accuracy of the RACH configuration parameter optimization of sub-district is brought influence.
Summary of the invention
Consider above-mentioned problem, propose this invention, the objective of the invention is to propose method, Apparatus and system that a kind of RACH configuration parameter is optimized, be used for exactly the RACH configuration parameter of sub-district is optimized.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of RACH configuration parameter optimization method, said method comprises:
The base station receive user equipment (UE) through and the base station between the random access information that reports of interface Uu mouth, said random access information comprises access delay at random;
The base station is added up the access delay at random of UE in the sub-district, and statistics is carried out the decision-making that the RACH configuration parameter is optimized as one of decision condition of carrying out the optimization of RACH RACH configuration parameter.
Further; Said method also comprised the step of UE record random access information UE reports random access information through the Uu mouth before, said access delay at random is: first random access guiding of UE transmission is to receiving that the solution of access contention at random sign ID and this access contention at random that receives of correct handling that eNB sends solve the time that identifies ID.
Further, UE reports random access information through following mode:
ENB UE in the sub-district sends the random access information inquiry request message; UE sends random access information query requests response message after receiving the random access information inquiry request message, and in random access information query requests response message, carries the random access information that is write down.
Further, said random access information inquiry request message is a UE information request UEInformationRequest message, and said random access information query requests response message is the UEInformationResponse of a UE information response message.
Further, also comprise the leading number of sending in the random access procedure, the identification information whether random access procedure is competed in the said random access information.
Based on the embodiment of the invention, the present invention also proposes a kind of base station, and said base station comprises:
Enquiry module is used for sending the random access information inquiry request message to UE;
Receiver module is used to receive the random access information query requests response message that UE feeds back, and carries the random access information that UE writes down in the said random access information query requests response message, comprises access delay at random in the said random access information;
Statistical module is used for the access delay at random of UE in the sub-district is added up;
Decision-making module is used for the statistics of statistical module is carried out the decision-making that the RACH configuration parameter is optimized as one of decision condition of carrying out the optimization of RACH RACH configuration parameter.
Based on the embodiment of the invention, the present invention also proposes a kind of UE, and said UE comprises:
Logging modle is used to write down random access information, and said random access information comprises access delay at random;
Computing module is used to calculate access delay at random;
Reporting module is used for after receiving the random access information inquiry request message that sends the base station, sends random access information query requests response message to the base station, in random access information query requests response message, random access information is reported the base station.
Based on base station and the UE that the embodiment of the invention provides, the present invention also proposes a kind of RACH configuration parameter optimization system, in this system:
Said UE be used for through and the base station between the Uu mouth report random access information, said random access information comprises access delay at random;
Said base station is used to receive the random access information that UE reports; And the access delay at random of UE in the sub-district added up, statistics is carried out the decision-making that the RACH configuration parameter is optimized as one of decision condition of carrying out the optimization of RACH RACH configuration parameter.
Further, in the said system, also comprise the leading number of sending in the random access procedure, the identification information whether random access procedure is competed in the said random access information; Said access delay at random is: UE sends first random access guiding to receiving that the access contention at random that eNB sends solves the time that identifies ID and this access contention at random that receives solution sign of correct handling ID.
The signaling of UE among the present invention through standard Uu interface, with measure accurately at random the access delay information reporting supply eNB to whether carrying out the RACH optimum decision to eNB with execution provides sufficient foundation, help RACH optimize more reasonable, the lifting network performance.
Description of drawings
The UE flow chart of steps of the method for measurement of access delay at random in a kind of sub-district that Fig. 1 provides for the embodiment of the invention;
Fig. 2 is a UE access delay measurement and report process chart at random;
A kind of RACH configuration parameter optimization system structural representation that Fig. 3 provides for the embodiment of the invention.
Embodiment
Basic thought of the present invention is: the access delay at random of UE record oneself; And it is reported to eNB through the Uu mouth between UE and the eNB; Make eNB can accurately get access to the access delay at random of all UE in the sub-district; ENB to the UE that receives at random access delay information add up, thereby for the optimization of RACH configuration parameter provides foundation, realize exactly optimization to the RACH configuration parameter of sub-district.
For making the object of the invention, technical scheme and advantage clearer, below lift embodiment and with reference to accompanying drawing, to further explain of the present invention.
Embodiment 1:
The UE flow chart of steps of the method for measurement of access delay at random in a kind of sub-district that Fig. 1 provides for the embodiment of the invention, this method comprises the steps:
Step 101, UE initiate random access procedure, and the record random access information;
Said random access information comprises access delay at random, and said access delay at random is: UE sends first random access guiding to receiving that the access contention at random that eNB sends solves the time that identifies ID and this access contention at random that receives solution sign of correct handling ID;
Step 102, eNB UE in the sub-district sends the random access information inquiry request message;
Among this embodiment, eNB is through sending the random access information that UE information request UEInformationRequest message is inquired about UE to UE, and the present invention also can realize the inquiry of UE random access information through revising other existing signaling or newly-increased signaling message;
Step 103, UE report random access information;
Among this embodiment, after UE receives the UEInformationRequest message that eNB sends, send the UE UEInformationResponse of information response message, random access information is reported eNB through this message to eNB;
The present invention is reported to eNB with the access delay at random of this UE record in the rach-ReportReq-r9 of UEInformationResponse message cell; Among this embodiment, in the rach-Report-r9 cell, increase the raDelayTime-r9 cell and be used to carry access delay at random, its unit is a millisecond (ms).
The present invention also can report access delay at random through revising other existing signaling or newly-increased signaling message, and the present invention does not limit;
Step 104, eNB carry out statistical analysis to the access delay at random that all UE in the sub-district report;
Step 105, eNB are according to the UE of a period of time in the sub-district statistic analysis result of access delay at random; And the RACH configuration information of network performance index and adjacent area etc.; Judge whether to satisfy RACH and optimize trigger condition, if satisfy then execution in step 106, otherwise execution in step 104;
The optimization of step 106, execution RACH configuration parameter.
Embodiment 2:
Like Fig. 2 is UE access delay measurement and report process chart at random, through UE oneself access delay is at random carried out record, and is reported to eNB, for the RACH configuration optimization of sub-district provides effective support.The detailed step of this embodiment is following:
Step 1, the resident sub-district cell A that arrives of UE; Read the relevant configuration information of RACH in the cell broadcast information; For some reason, when initiating service request service request, UE initiates random access procedure like UE; In random access procedure, the moment that record sends random access guiding for the first time is T1.
Step 2, UE and cell A carry out random access procedure, and UE receives that access contention solves ID at random, and this ID of correct handling; Think then to insert at random successfully and finish that is inserting when successfully finishing, the UE record should be T2 in moment; Then; UE is through calculating the access delay at random that T2-T1 obtains this UE, and simultaneously, UE also writes down its leading number of in random access procedure, sending, whether random access procedure information such as competition take place.
Carry out RRC between step 3, UE and the eNB and connect the process of setting up;
After step 4, UE RRC connection are set up successfully; ENB issues UE information request UEInformationRequest message to this UE; This request message requests UE reports its random access information, and said random access information comprises the leading number of sending in access delay, the random access procedure at random, the identification information whether random access procedure is competed etc.
After step 5, UE receive UEInformationRequest message; Whether competition takes place in the leading number of sending in the random access procedure with its record, the random access procedure and after random access information such as access delay is filled at random, send to eNB through UEInformationResponse message;
Step 6, eNB carry out statistical analysis to the UE random access information that inserts in the sub-district; And the access probability of combination sub-district and the condition of access delay probability; Whether decision-making need be optimized the RACH configuration parameter of sub-district; In the time need being optimized, then carrying out RACH and optimize, otherwise do not carry out other operation the RACH configuration parameter of sub-district.
In sum, utilize the access delay at random of UE record oneself, and it is reported to the mode of eNB; ENB can the accurate assessment sub-district in the situation of access delay at random of UE; And can effectively carry out the optimization of RACH configuration parameter according to assessment result, and insert success rate to improve the LTE system, reduce access delay; Reduce presence of intercell interference, promote cell capacity.
Embodiment 3
A kind of RACH configuration parameter optimization system structural representation that Fig. 3 provides for this embodiment; This system comprises UE and base station; Said UE be used for through and the base station between the Uu mouth report random access information, said random access information comprises access delay at random.Preferably, also can comprise the leading number of sending in the random access procedure, the identification information whether random access procedure is competed in the said random access information; Access delay at random of the present invention is: UE sends first random access guiding to receiving that the access contention at random that eNB sends solves the time that identifies ID and this access contention at random that receives solution sign of correct handling ID;
In this system; Said base station is used to receive the random access information that UE reports; And the access delay at random of UE in the sub-district added up, statistics is carried out the decision-making that the RACH configuration parameter is optimized as one of decision condition of carrying out the optimization of RACH RACH configuration parameter.
Said base station further comprises: enquiry module 311, statistical module 312, decision-making module 313;
Enquiry module 311 is used for sending the random access information inquiry request message to UE, and receives the random access information query requests response message of UE feedback, carries the random access information that UE writes down in the said random access information query requests response message;
Statistical module 312 is used for the access delay at random of UE in the sub-district is added up;
Decision-making module 313 is used for the statistics of statistical module 312 is carried out the decision-making that the RACH configuration parameter is optimized as one of decision condition of carrying out the optimization of RACH RACH configuration parameter.
Said UE further comprises: logging modle 301, computing module 302, reporting module 303;
Logging modle 301 is used to write down random access information;
Computing module 302 is used to calculate access delay at random;
Reporting module 303 is used for after receiving the random access information inquiry request message that sends the base station, sends random access information query requests response message to the base station, in random access information query requests response message, random access information is reported the base station.
Preferably, said random access information inquiry request message is a UE information request UEInformationRequest message, and said random access information query requests response message is the UEInformationResponse of a UE information response message.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. RACH configuration parameter optimization method is characterized in that said method comprises:
The base station receive user equipment (UE) through and the base station between the random access information that reports of interface Uu mouth, said random access information comprises access delay at random;
The base station is added up the access delay at random of UE in the sub-district, and statistics is carried out the decision-making that the RACH configuration parameter is optimized as one of decision condition of carrying out the optimization of RACH RACH configuration parameter.
2. method according to claim 1; It is characterized in that; UE reports random access information through the Uu mouth before, also comprise the step of UE record random access information, said access delay at random is: first random access guiding of UE transmission is to receiving that the solution of access contention at random sign ID and this access contention at random that receives of correct handling that eNB sends solve the time that identifies ID.
3. method according to claim 2 is characterized in that, UE reports random access information through following mode:
ENB UE in the sub-district sends the random access information inquiry request message; UE sends random access information query requests response message after receiving the random access information inquiry request message, and in random access information query requests response message, carries the random access information that is write down.
4. method according to claim 3; It is characterized in that; Said random access information inquiry request message is a UE information request UEInformationRequest message, and said random access information query requests response message is the UEInformationResponse of a UE information response message.
5. method according to claim 1 is characterized in that, also comprises the leading number of sending in the random access procedure, the identification information whether random access procedure is competed in the said random access information.
6. a base station is characterized in that, said base station comprises:
Enquiry module is used for sending the random access information inquiry request message to UE;
Receiver module is used to receive the random access information query requests response message that UE feeds back, and carries the random access information that UE writes down in the said random access information query requests response message, comprises access delay at random in the said random access information;
Statistical module is used for the access delay at random of UE in the sub-district is added up;
Decision-making module is used for the statistics of statistical module is carried out the decision-making that the RACH configuration parameter is optimized as one of decision condition of carrying out the optimization of RACH RACH configuration parameter.
7. base station according to claim 6; It is characterized in that; Said random access information inquiry request message is a UE information request UEInformationRequest message, and said random access information query requests response message is the UEInformationResponse of a UE information response message.
8. a UE is characterized in that, said UE comprises:
Logging modle is used to write down random access information, and said random access information comprises access delay at random;
Computing module is used to calculate access delay at random;
Reporting module is used for after receiving the random access information inquiry request message that sends the base station, sends random access information query requests response message to the base station, in random access information query requests response message, random access information is reported the base station.
9. a RACH configuration parameter optimization system is characterized in that, this system comprises base station as claimed in claim 6 and the described UE of claim 8;
Said UE be used for through and the base station between the Uu mouth report random access information, said random access information comprises access delay at random;
Said base station is used to receive the random access information that UE reports; And the access delay at random of UE in the sub-district added up, statistics is carried out the decision-making that the RACH configuration parameter is optimized as one of decision condition of carrying out the optimization of RACH RACH configuration parameter.
10. system according to claim 9 is characterized in that, also comprises the leading number of sending in the random access procedure, the identification information whether random access procedure is competed in the said random access information; Said access delay at random is: UE sends first random access guiding to receiving that the access contention at random that eNB sends solves the time that identifies ID and this access contention at random that receives solution sign of correct handling ID.
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| CN2011101700233A CN102843706A (en) | 2011-06-22 | 2011-06-22 | Method, device and system for optimizing RACH (Random Access Channel) configuration parameters |
| PCT/CN2012/071462 WO2012174873A1 (en) | 2011-06-22 | 2012-02-22 | Method, device and system for optimizing random access channel configuration parameters |
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