CN101784122A - Method for processing physical random access channel configuration information - Google Patents
Method for processing physical random access channel configuration information Download PDFInfo
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Abstract
The invention provides a method for processing physical random access channel configuration information, which is applied to a communication system comprising a first evolution base station having a first cell and a second evolution base station having one or more identical-frequency cells adjacent to the first cell. The method comprises that: the first evolution base station receives a measurement reporting message from user equipment residing in the first cell, wherein the measurement reporting message carries PRACH configuration information of one or more identical-frequency adjacent cells; and the first evolution base station acquires the PRACH configuration information of the identical-frequency adjacent cells from the measurement reporting message. The method has the advantage of eliminating interference produced by random access.
Description
Technical field
The present invention relates to the communications field, in particular to the processing method of Physical Random Access Channel (Physical Random Access Channel abbreviates PRACH as) configuration information.
Background technology
Long Term Evolution (Long Term Evolution, abbreviating LTE as) network comprises: evolution Universal Terrestrial Radio Access Network (Evolved Universal Terrestrial Radio AccessNetwork, abbreviate E-UTRAN as) base station, evolution base station (Evolved NodeB, abbreviate eNB as), evolution packet switching center, evolution block core (Evolved PacketCore abbreviates EPC as).
In the LTE system, one cover PRACH configuration parameter when setting up, each sub-district is all arranged, the configuration of PRACH mainly comprises: the PRACH configuration index, be used to produce the logic root sequence index u and the circulation skew Ncs of Access Preamble sequence (Preamble) at random, the high-speed mobile attribute of sub-district, the frequency domain position skew (Prach-Frequency Offset) of PRACH.Above-mentioned configuration is notified to subscriber equipment (User Equipment abbreviates UE as) by system broadcast information, and wherein, the PRACH configuration index is represented form and the PRACH channel configuration of Preamble; The high speed attribute of logic root sequence index u, circulation skew Ncs and sub-district is used to produce 64 Preamble sequences that use this sub-district; The frequency domain position skew of PRACH is used for determining the extreme lower position skew of PRACH channel on frequency domain.
In the LTE system, if UE need be mutual with network side, then UE need at first obtain uplink synchronous, at this moment, just needs to initiate random access procedure.The process that UE and network side carry out uplink synchronous mainly comprises following operation:
Step 1: UE sends the sequence of choosing of Access Preamble at random according to the Preamble form on the PRACH channel of choosing.
Step 2: network side sends accidental access response to UE after receiving the sequence of Access Preamble at random of UE.
After this, UE after the response that receives article one Preamble coupling, promptly think obtained synchronously with network side after, no longer receive other accidental access response, send Preamble up to next time, follow-up UE continues alternately according to accidental access response and network side.
Above-mentioned random access procedure can be divided into based on the access at random of competition with based on non-competing two kinds of forms that insert at random.For the access at random based on competition, the sequence of Access Preamble at random of PRACH channel in the step 1 and transmission all is that UE selects in the PRACH configuration that this sub-district allows at random; And for based on non-competing access at random, the PRACH channel in the step 1 and the Preamble sequence of transmission all are that network side is selected in the PRACH configuration that this sub-district allows and notified UE by the UE dedicated signaling.
In above-mentioned random access procedure, can run into interference problem under certain conditions, Fig. 1 is the schematic diagram that inserts interference at random according to correlation technique, as shown in Figure 1, sub-district A (belonging to eNB1) and sub-district B (belonging to eNB2) are the homogeneous-frequency adjacent-domain of LTE, and adopt identical PRACH configuration, when the UE that normally resides in sub-district A initiates to insert at random, the Preamble that UE sends might be received simultaneously by two sub-districts, at this moment, network side is owing to can't determine the sub-district that UE is affiliated, and therefore, sub-district A and sub-district B can reply accidental access response to UE.Can not influence the reception of UE although it is so for this sub-district accidental access response, but, load is handled in the access at random that has increased sub-district B that inserts at random of UE, disturbed the reception of random access code among the B of sub-district, may cause the mistake that timing advance is estimated among the B of sub-district, also increased among the B of sub-district the probability of access interference at random, and because sub-district B may can send the ascending resource authorization signaling to UE in accidental access response, the Radio Resource that so also can have influence on sub-district B uses, and therefore may waste the ascending wireless resource of sub-district B.
For manual maintenance workload and the optimization network capabilities that reduces network, current at next generation mobile networks (Next Generation Mobile Network, abbreviate NGMN as) in the demand that proposes of tissue, LTE need support self-organizing network (Self-OrganizedNetwork, abbreviate SON as) function, wherein, the self-configuring function and the self-optimization function that comprise network.Can dispose by the PRACH that the self-configuring function and the self-optimization function of network are revised the sub-district automatically.But the prerequisite of self-organizing network function is to need sub-district A and sub-district B to know the other side's PRACH configuration mutually.Therefore, for two homogeneous-frequency adjacent-domains that do not belong to same eNB, the PRACH configuration information that how to obtain the adjacent area is the problem that needs solve.
Summary of the invention
At in the correlation technique for two homogeneous-frequency adjacent-domains that do not belong to same eNB, can't obtain the adjacent area the PRACH configuration information problem and the present invention is proposed, for this reason, main purpose of the present invention is to provide the processing method of PRACH configuration information, one of to address the above problem at least.
To achieve these goals, according to an aspect of the present invention, provide a kind of processing method of PRACH configuration information.
Processing method according to PRACH configuration information of the present invention, be applied to comprise first evolution base station and have the communication system of second evolution base station of one or more homogeneous-frequency adjacent-domains of first sub-district with first sub-district, said method comprises: first evolution base station receives the measurement reporting message from the subscriber equipment that resides in first sub-district, wherein, measure the PRACH configuration information that carries one or more homogeneous-frequency adjacent-domains in the reporting message; First evolution base station obtains the PRACH configuration information of homogeneous-frequency adjacent-domain from measure reporting message.
Preferably, before the measurement reporting message of first evolution base station reception from subscriber equipment, said method also comprises: subscriber equipment is carried out common frequency measurement, and sends measurement report to first evolution base station, wherein, carry the Physical Cell Identifier of one or more homogeneous-frequency adjacent-domains in the measurement report; Subscriber equipment obtains the PRACH configuration information from the broadcast message of the homogeneous-frequency adjacent-domain of first evolution base station indication, and the PRACH configuration information of the homogeneous-frequency adjacent-domain that obtains is reported first evolution base station by measuring reporting message.
Preferably, before the measurement reporting message of first evolution base station reception from subscriber equipment, said method also comprises: subscriber equipment is carried out common frequency measurement according to the measurement indication of first evolution base station, and measurement result reported first evolution base station, wherein, carry homogeneous-frequency adjacent-domain sign to be measured in the measurement of first evolution base station indication; Subscriber equipment is according to the report indication of first evolution base station based on measurement feedback, from the broadcast message of the corresponding homogeneous-frequency adjacent-domain of homogeneous-frequency adjacent-domain sign, obtain the PRACH configuration information, and the PRACH configuration information of the homogeneous-frequency adjacent-domain that obtains is reported first evolution base station by measuring reporting message.
Preferably, first evolution base station obtained the PRACH configuration information of homogeneous-frequency adjacent-domain from measure reporting message after, said method also comprises: first evolution base station judged whether the PRACH configuration information of homogeneous-frequency adjacent-domain is identical with a PRACH configuration information of first sub-district; If identical, then first evolution base station is that first sub-district is provided with the PRACH configuration information different with the PRACH configuration information of all homogeneous-frequency adjacent-domains again.
Preferably, the PRACH configuration information of judging homogeneous-frequency adjacent-domain and a PRACH configuration information identical comprising whether: determine first set of the logic root sequence of homogeneous-frequency adjacent-domain according to the logic root sequence index u in the PRACH configuration information of homogeneous-frequency adjacent-domain, circulation skew Ncs and sub-district high-speed mobile attribute; Determine second set of the logic root sequence of first sub-district according to the logic root sequence index u in the PRACH configuration information, circulation skew Ncs and sub-district high-speed mobile attribute; If there are not common factor in first set and second set, determine that then the PRACH configuration information of homogeneous-frequency adjacent-domain is different with a PRACH configuration information; If existing, first set and second set occur simultaneously, then skew determines that homogeneous-frequency adjacent-domain sends the 3rd set of the time-frequency domain position that Access Preamble sequence at random uses according to the configuration index in the PRACH configuration information of homogeneous-frequency adjacent-domain and frequency domain position, determines that according to the configuration index in the PRACH configuration information and frequency domain position skew first sub-district sends the 4th set of the time-frequency domain position that Access Preamble sequence at random uses; If there are not common factor in the 3rd set and the 4th set, the PRACH configuration information of then determining homogeneous-frequency adjacent-domain is different with a PRACH configuration information, if the 3rd set and the 4th set exist occur simultaneously, determine that then the PRACH configuration information of homogeneous-frequency adjacent-domain is identical with a PRACH configuration information.
Preferably, the PRACH configuration information comprises: configuration index, the logic root sequence index u that is used to produce Access Preamble sequence at random and circulation skew Ncs, sub-district high-speed mobile attribute, frequency domain position skew.
To achieve these goals, according to an aspect of the present invention, also provide a kind of processing method of PRACH configuration information.
Processing method according to PRACH configuration information of the present invention, be applied to comprise the communication system of first evolution base station and second evolution base station of homogeneous-frequency adjacent-domain, said method comprises: second evolution base station receives the PRACH configuration information from first evolution base station, wherein, the PRACH configuration information is the PRACH configuration information of the Serving cell in first evolution base station.
Preferably, first evolution base station sends the PRACH configuration information by one of following message to second evolution base station: X2 sets up request message, neighbor cell configuration information updating message.
Preferably, first evolution base station is set up response message by X2 and is sent the PRACH configuration information to second evolution base station, before the PRACH configuration information of second evolution base station reception from first evolution base station, said method also comprises: second evolution base station sends X2 to first evolution base station and sets up request message.
Preferably, first evolution base station sends the PRACH configuration information by the evolution base station configuration update message to second evolution base station, and wherein, the PRACH configuration information is the PRACH configuration information of the sub-district of config update in first evolution base station.
Preferably, after the PRACH configuration information of second evolution base station reception from first evolution base station, said method also comprises: second evolution base station judges in the Serving cell of this base station whether have predetermined cell, wherein, the PRACH configuration information of predetermined cell is identical with the PRACH configuration information that receives; If exist, then first evolution base station is provided with the PRACH configuration information different with the PRACH configuration information that receives for the sub-district again.
Preferably, judge the PRACH configuration information and identical the comprising of PRACH configuration information that receives of predetermined cell: first of the logic root sequence of determining predetermined cell according to logic root sequence index u, circulation skew Ncs and the sub-district high-speed mobile attribute of the sub-district in the PRACH configuration information of predetermined cell is gathered; Determine second set of the logic root sequence of this sub-district according to the logic root sequence index u of the sub-district in the PRACH configuration information that receives, circulation skew Ncs and sub-district high-speed mobile attribute; First evolution base station judges whether first set and second set exist common factor, if there is no, determines that then the PRACH configuration information of predetermined cell is different with the PRACH configuration information that receives; If exist, then determine that according to the configuration index of the sub-district in the PRACH configuration information of predetermined cell and frequency domain position skew predetermined cell sends the 3rd set of the time-frequency domain position that Access Preamble sequence at random uses, determine that according to the configuration index of the sub-district in the PRACH configuration information that receives and frequency domain position skew this sub-district sends the 4th set of the time-frequency domain position that Access Preamble sequence at random uses; Judge whether the 3rd set and the 4th set exist common factor, if there is no, the PRACH configuration information of then determining predetermined cell is different with the PRACH configuration information that receives, if exist, determines that then the PRACH configuration information of predetermined cell is identical with the PRACH configuration information that receives.
Preferably, the PRACH configuration information comprises: configuration index, the logic root sequence index u that is used to produce Access Preamble sequence at random and circulation skew Ncs, sub-district high-speed mobile attribute, frequency domain position skew.
By the present invention, adopt the method for eNB reception from the PRACH configuration information of UE or other eNB, solved in the correlation technique for two homogeneous-frequency adjacent-domains that do not belong to same eNB, can't obtain the problem of the PRACH configuration information of adjacent area, and then eliminated and inserted the interference that produces at random.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram that inserts interference at random according to correlation technique;
Fig. 2 is the flow chart according to the processing method of the PRACH configuration information of the embodiment of the invention one;
Fig. 3 is the schematic diagram of the processing method of the PRACH configuration information of example 1 and example 2 according to the present invention;
Fig. 4 is the flow chart of the processing method of the PRACH configuration information of example 3 and example 4 according to the present invention;
Fig. 5 is the flow chart of processing method of the PRACH configuration information of the example 5 according to the present invention;
Fig. 6 is the flow chart according to the processing method of the PRACH configuration information of the embodiment of the invention 6;
Fig. 7 is the flow chart of judging the processing procedure that PRACH configuration is whether identical according to the embodiment of the invention.
Embodiment
Functional overview
Consider in the correlation technique for two homogeneous-frequency adjacent-domains that do not belong to same eNB, can't obtain the problem of the PRACH configuration information of adjacent area, the embodiment of the invention provides the processing method of PRACH configuration information, adopt eNB to obtain the PRACH configuration information, also can set up request message, X2 sets up response message, configuration update message or neighbor cell configuration information updating message and obtains the PRACH configuration information by the X2 that other eNB sends by the measurement reporting message that receives from UE.Can solve the above-mentioned interference problem that inserts at random like this.
Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
Method embodiment
Embodiment one
According to embodiments of the invention, a kind of processing method of PRACH configuration information is provided, be applied to comprise eNB1 and have the communication system of eNB2 of one or more homogeneous-frequency adjacent-domains of first sub-district with first sub-district.Fig. 2 is the flow chart according to the processing method of the PRACH configuration information of the embodiment of the invention one, and as shown in Figure 2, this method comprises that following step S202 is to step S204:
Step S202, eNB1 receives the measurement reporting message from the UE that resides in first sub-district, wherein, measures the PRACH configuration information that carries one or more homogeneous-frequency adjacent-domains in the reporting message.
Step S204, eNB1 obtain the PRACH configuration information of homogeneous-frequency adjacent-domain from measure reporting message.
Before step S202, this method can comprise one of operation:
(1) UE carries out common frequency measurement, and sends measurement report to eNB1, wherein, carries the Physical Cell Identifier (Physical CellID is called for short PCI) of one or more homogeneous-frequency adjacent-domains in the measurement report; UE obtains the PRACH configuration information of homogeneous-frequency adjacent-domain from the broadcast message of the homogeneous-frequency adjacent-domain of eNB1 indication, and the PRACH configuration information that obtains is reported eNB1 by measuring reporting message.
(2) UE carries out common frequency measurement according to the measurement indication of eNB1, and measurement result is reported eNB1, wherein, measures and carries homogeneous-frequency adjacent-domain sign to be measured in the indication; UE is according to the report indication of eNB1 based on measurement feedback, from the broadcast message of the corresponding homogeneous-frequency adjacent-domain of homogeneous-frequency adjacent-domain sign, obtain the PRACH configuration information of homogeneous-frequency adjacent-domain, and the PRACH configuration information of the homogeneous-frequency adjacent-domain that obtains is reported eNB1 by measuring reporting message.
For above-mentioned two kinds of realization situations, will in following example 1 and example 2, be described in detail.
After step S204, said method can also comprise whether the PRACH configuration information of the homogeneous-frequency adjacent-domain that following operation: eNB1 judges that UE reports is identical with a PRACH configuration information of first sub-district; If identical, then eNB1 is that first sub-district is provided with the PRACH configuration information different with homogeneous-frequency adjacent-domain PRACH configuration information again.Wherein, for judge whether identical operations will be described in detail for a homogeneous-frequency adjacent-domain PRACH configuration information and a PRACH configuration information in Fig. 7.
Wherein, the PRACH configuration information in the foregoing description comprises but is not limited to following content: the PRACH configuration index, be used for producing logic root sequence index u and circulation skew Ncs, the high-speed mobile attribute of sub-district and the frequency domain position skew (Prach-FrequencyOffset) of PRACH insert Preamble (prefix sequence) at random.
By this embodiment, adopt the measurement reporting message that receives UE to obtain the method for the PRACH configuration information of homogeneous-frequency adjacent-domain, can eliminate the base station services sub-district disturbs for the access at random of homogeneous-frequency adjacent-domain, reduce adjacent area UE and insert delay and the failure probability that brings because of interference at random, reduce the load of access at random of adjacent area, can also avoid simultaneously disturbing the waste of radio resources of bringing because of inserting at random.
Below in conjunction with Fig. 3 the example 1 of application method embodiment one and the implementation procedure of example 2 being described in detail, for convenience of description, in following two embodiment, is that the situation of homogeneous-frequency adjacent-domain describes with sub-district A among the eNB1 and the sub-district B among the eNB2 only.
Example 1
Fig. 3 is the schematic diagram of the processing method of the PRACH configuration information of example 1 and example 2 according to the present invention, and as shown in Figure 3, this example comprises following operation:
Step 1, if the Serving cell A among the eNB1 supports Automatic Neighboring Relation function (Automatic Neighbor Relation Function, abbreviate ANRF as) the sub-district, part as the normal call flow process, eNB1 carries out common frequency measurement by dedicated signaling indication UE, the report condition that wherein comprises measurement is such as measured signal strengths threshold value etc.
Step 5, UE reports eNB1 with the PRACH configuration information (its structure is as shown in table 1) of sub-district B by measurement report.
Table 1PRACH configuration information structure
| The cell title | Cell type and reference value |
| The PRACH configuration index | Integer (0...63) |
| The cell title | Cell type and reference value |
| Logic root sequence index u | Integer (0...837) |
| Circulation skew Ncs | Integer (0...15) |
| Sub-district high-speed mobile attribute | Boolean |
| The skew of PRACH frequency domain position | Integer (0...104) |
By above-mentioned steps, there is identical PRACH configuration in step 6 if eNB1 finds Serving cell A and sub-district B, then selects the cover PRACH configuration all different with its all homogeneous-frequency adjacent-domains for Serving cell A again by self-configuring.
Example 2
Fig. 3 is the schematic diagram of the processing method of the PRACH configuration information of example 1 and example 2 according to the present invention, and as shown in Figure 3, this example comprises following operation:
Step 1, part as the normal call flow process, eNB1 carries out common frequency measurement by dedicated signaling indication UE, can carry the tabulation of co-frequency neighbor cell in the dedicated signaling here, comprise sub-district B in this tabulation, in addition, also comprise the report condition of each measurement in the signaling, such as measured signal strengths threshold value etc.
Step 5 if UE can obtain the PRACH configuration information of sub-district B, then reports to eNB1 by measuring reporting message.
By above-mentioned steps, there is identical PRACH configuration in step 6 if eNB1 finds Serving cell A and sub-district B, then selects the cover PRACH configuration all different with its all homogeneous-frequency adjacent-domains for Serving cell again by self-configuring.
By above-mentioned example 1 and example 2, eNB notice UE carries out homogeneous-frequency adjacent-domain and measures, in the measurement reporting message of UE, increase the PRACH configuration information of adjacent area, example 1 is with the difference of example 2: when eNB1 notice UE carries out common frequency measurement, the eNB1 indication UE of example 1 measures and finds and report homogeneous-frequency adjacent-domain, the sub-district of not specifying UE to measure, and the sub-district that the eNB1 of example 2 has specified UE to measure.
Embodiment two
According to embodiments of the invention, a kind of processing method of PRACH configuration information also is provided, be applied to comprise the communication system of the different e NB (such as eNB1 and eNB2) of homogeneous-frequency adjacent-domain, this method comprises: eNB2 receives the PRACH configuration information from eNB1, wherein, the PRACH configuration information is the PRACH configuration information of all Serving cells in the eNB1.
Particularly, eNB1 sends to eNB2 by one of following message that PRACH configuration information: X2 sets up request message, X2 sets up response message, eNB configuration update message, neighbor cell configuration information updating message (this message is in the message default according to the embodiment of the invention).
Wherein, send the PRACH configuration information if eNB1 sets up response message by X2 to eNB2, then before the PRACH configuration information of eNB2 reception from eNB1, eNB2 sends X2 to eNB1 and sets up request message.
If eNB1 sends the PRACH configuration information by the eNB configuration update message to eNB2, then the PRACH configuration information is the PRACH configuration information of the sub-district of config update in the eNB1.
Further, after the PRACH configuration information of eNB2 reception from eNB1, whether have predetermined cell in the Serving cell of eNB2 judgement oneself, wherein, the PRACH configuration information of predetermined cell is identical with the PRACH configuration information of the homogeneous-frequency adjacent-domain that receives; If exist, then eNB1 is the different PRACH configuration informations of all homogeneous-frequency adjacent-domain PRACH configuration informations of this cell configuration and its again.Wherein, whether identical operations will be described in detail in Fig. 7 for the PRACH configuration information of the PRACH configuration information of judging predetermined cell and the homogeneous-frequency adjacent-domain that receives.
Wherein, above-mentioned PRACH configuration information can include but not limited to following content: configuration index, the logic root sequence index u that is used to produce Access Preamble sequence at random and circulation skew Ncs, sub-district high-speed mobile attribute, frequency domain position skew.
By this embodiment, the method of homogeneous-frequency adjacent-domain PRACH configuration information is obtained in employing from other eNB, can eliminate the base station services sub-district disturbs for the access at random of homogeneous-frequency adjacent-domain, reduce adjacent area UE and insert delay and the failure probability that brings because of interference at random, reduce the load of access at random of adjacent area, can also avoid simultaneously disturbing the waste of radio resources of bringing because of inserting at random.
Be described in detail below in conjunction with the implementation procedure of example 3 to 6 couples of application method embodiment two of example, wherein, comprised in the following example eNB1 by X2 set up request message, X2 sets up one of response message, eNB configuration update message, these four kinds of message of neighbor cell configuration information updating message send situation from the PRACH configuration information to eNB2.
Example 3
Fig. 4 is the flow chart of the processing method of the PRACH configuration information of example 3 and example 4 according to the present invention, and as shown in Figure 4, this example comprises following operation (step S402 is to step S404):
Step S402, eNB1 initiates X2 to eNB2 and sets up request process, and eNB1 sends X2 to eNB2 and sets up request message, preferably, can set up in the service cell information of request message at X2, carry the PRACH configuration information (the structure reference table 1 of PRACH configuration information) of all sub-districts of this eNB.
Step S404, the X2 that eNB2 receives the eNB1 transmission sets up after the request message, eNB2 returns X2 to eNB1 and sets up response message, and set up the cell information that carries eNB2 local service sub-district in the response message at X2, in the cell information of Serving cell, comprise the PRACH configuration information (PRACH configuration information structure reference table 1) of all sub-districts of this eNB.
After this, if eNB1 successfully receives X2 and sets up response message, and eNB1 finds that there is the identical homogeneous-frequency adjacent-domain of PRACH configuration in certain Serving cell in this eNB, then selects the cover PRACH configuration all different with its all homogeneous-frequency adjacent-domains for this Serving cell again by self-configuring.
Example 4
Fig. 4 is the flow chart of the processing method of the PRACH configuration information of example 3 and example 4 according to the present invention, and as shown in Figure 4, this example comprises following operation (step S402 is to step S404):
Step S402, eNB1 initiates X2 to eNB2 and sets up request process, eNB1 sends X2 to eNB2 and sets up request message, and sets up in the service cell information of request message at X2, carries the PRACH configuration information (the structure reference table 1 of PRACH configuration information) of all sub-districts of this eNB;
The X2 that step S404, eNB2 receive the eNB1 transmission sets up after the request message, and eNB2 returns X2 to eNB1 and sets up response message.Preferably, can set up the cell information that carries eNB2 local service sub-district in the response message, in the cell information of Serving cell, comprise the PRACH configuration information (the structure reference table 1 of PRACH configuration information) of all sub-districts of this eNB at X2.
In step S404, if finding the Serving cell in this eNB, eNB2 has the identical homogeneous-frequency adjacent-domain of PRACH configuration, then select the cover PRACH configuration all different for this Serving cell again with its all homogeneous-frequency adjacent-domains by self-configuring.
By above-mentioned example 3 and example 4, eNB sets up message by X2, increase the PRACH configuration information of sub-district in the service cell information the inside that X2 sets up message, correspondingly, in the X2 of target BS sets up the service cell information of target BS of response message, increase the PRACH configuration information of sub-district.
Example 5
Fig. 5 is the flow chart of processing method of the PRACH configuration information of the example 5 according to the present invention, and as shown in Figure 5, this example comprises following operation (step S502 is to step S504):
Step S502, eNB1 initiates eNB config update process to eNB2, eNB1 sends the eNB configuration update message to eNB2, and in the service cell information of eNB configuration update message, carries the PRACH configuration information (the structure reference table 1 of PRACH configuration information) of this eNB config update sub-district;
Step S504, eNB2 receive after the eNB configuration update message of eNB1 transmission, preferably, can preserve the information of the renewal sub-district of eNB1, wherein, the information of the renewal sub-district of eNB1 comprises the PRACH configuration information of sub-district, then, eNB2 returns eNB config update acknowledge message to eNB1.
In step S504, if eNB config update process success, and eNB2 finds that there is the identical homogeneous-frequency adjacent-domain of PRACH configuration in the Serving cell in this eNB, then selects the cover PRACH configuration all different with its all homogeneous-frequency adjacent-domains for Serving cell again by self-configuring.
By this example, eNB increases the PRACH configuration information of Serving cell in the service cell information that sends to the target eNB configuration update message.
Example 6
Fig. 6 is the flow chart according to the processing method of the PRACH configuration information of the embodiment of the invention 6, and as shown in Figure 6, this example comprises following operation (step S602 is to step S604):
Step S602, the neighbor cell configuration information updating process that eNB1 initiates to eNB2, eNB1 sends neighbor cell configuration information updating message to eNB2, and carries the PRACH configuration information (the structure reference table 1 of PRACH configuration information) of the Serving cell of eNB1 in neighbor cell configuration information updating message.
Step S604, eNB2 receive after the neighbor cell configuration information updating message of eNB1 transmission, preferably, can preserve the PRACH configuration information of the Serving cell of eNB1, and then, eNB2 returns neighbor cell configuration information updating acknowledge message to eNB1.
In step S604, if finding the Serving cell of this eNB, eNB2 has the identical homogeneous-frequency adjacent-domain of PRACH configuration, then select the cover PRACH configuration all different for this Serving cell again with its all homogeneous-frequency adjacent-domains by self-configuring.
By this example, eNB obtains the PRACH configuration information of the homogeneous-frequency adjacent-domain of Serving cell by the message of other X2 interface.
In above-mentioned 6 examples, all related to the processing of judging that PRACH configuration is whether identical, the process to this processing is described in detail below.
Fig. 7 is the flow chart of judging the processing procedure that PRACH configuration is whether identical according to the embodiment of the invention, as shown in Figure 7, provided a kind of method that judges whether to come reprovision Serving cell PRACH parameter, comprised following operation (step S702 is to step S712) by self-configuring:
Step S702, eNB determines that according to logic root sequence index u, circulation skew Ncs and the sub-district high-speed mobile attribute of Serving cell Serving cell produces the set U1 of the logic root sequence of 64 Preamble uses.
Step S704 determines that according to logic root sequence index u, the circulation skew Ncs of sub-district, adjacent area and the high-speed mobile attribute of adjacent area the adjacent area produces the set U2 of the logic root sequence of 64 Preamble uses.
Step S706 judges that whether set U1 and U2 that above-mentioned steps S702 and step S704 produce exist common factor, if above-mentioned set U1 and U2 have common factor, then proceed to step S708; Otherwise, proceed to step S714.
Step S708, eNB determines that according to the PRACH configuration index of Serving cell, the frequency domain position skew (Prach-FrequencyOffset) of PRACH Serving cell sends the set P1 that Preamble uses the time-frequency domain position.
Step S710 determines that according to the PRACH configuration index of adjacent area, the frequency domain position skew (Prach-FrequencyOffset) of PRACH the adjacent area sends the set P2 that Preamble uses the time-frequency domain position.
Step S712 judges that whether set P1 and P2 that above-mentioned steps S708 and step S710 produce exist common factor, if above-mentioned set P1 and P2 have common factor, then proceed to step S716; Otherwise, proceed to step S714.
Step S714, the PRACH configuration is inequality.
Step S716; The PRACH configuration is identical.
In sum, by the above embodiment of the present invention, the method that provides eNB to obtain homogeneous-frequency adjacent-domain PRACH configuration information, eNB can be according to the PRACH configuration information of the homogeneous-frequency adjacent-domain that obtains, reconfigure the PRACH configuration of Serving cell, avoid or reduce interference between the homogeneous-frequency adjacent-domain.Wherein, for the criterion that reconfigures Serving cell PRACH configuration, can be according to above-mentioned Several Parameters identical principle whether, but be not limited to this mode, comprise that also above-mentioned message part is identical, part is different but cause the identical situation of root sequence of preamble.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. the processing method of a Physical Random Access Channel PRACH configuration information, be applied to comprise first evolution base station and have the communication system of second evolution base station of one or more homogeneous-frequency adjacent-domains of described first sub-district with first sub-district, it is characterized in that described method comprises:
Described first evolution base station receives the measurement reporting message from the subscriber equipment that resides in described first sub-district, wherein, carries the PRACH configuration information of described one or more homogeneous-frequency adjacent-domains in the described measurement reporting message;
Described first evolution base station obtains the PRACH configuration information of described homogeneous-frequency adjacent-domain from described measurement reporting message.
2. method according to claim 1 is characterized in that, before the described measurement reporting message of described first evolution base station reception from described subscriber equipment, described method also comprises:
Described subscriber equipment is carried out common frequency measurement, and sends measurement report to described first evolution base station, wherein, carries the Physical Cell Identifier of described one or more homogeneous-frequency adjacent-domains in the described measurement report;
Described subscriber equipment obtains the PRACH configuration information from the broadcast message of the homogeneous-frequency adjacent-domain of described first evolution base station indication, and the PRACH configuration information of the described homogeneous-frequency adjacent-domain that will obtain reports described first evolution base station by described measurement reporting message.
3. method according to claim 1 is characterized in that, before the described measurement reporting message of described first evolution base station reception from described subscriber equipment, described method also comprises:
Described subscriber equipment is carried out common frequency measurement according to the measurement indication of described first evolution base station, and measurement result is reported described first evolution base station, wherein, carries homogeneous-frequency adjacent-domain sign to be measured in the measurement of described first evolution base station indication;
Described subscriber equipment is according to the report indication of described first evolution base station based on described measurement feedback, from the broadcast message of the corresponding homogeneous-frequency adjacent-domain of described homogeneous-frequency adjacent-domain sign, obtain the PRACH configuration information, and the PRACH configuration information of the described homogeneous-frequency adjacent-domain that will obtain reports described first evolution base station by described measurement reporting message.
4. method according to claim 1 is characterized in that, described first evolution base station obtained the PRACH configuration information of described homogeneous-frequency adjacent-domain from described measurement reporting message after, described method also comprised:
Described first evolution base station judges whether the PRACH configuration information of described homogeneous-frequency adjacent-domain is identical with a PRACH configuration information of described first sub-district;
If identical, then described first evolution base station is that described first sub-district is provided with the PRACH configuration information different with the PRACH configuration information of described all homogeneous-frequency adjacent-domains again.
5. method according to claim 4 is characterized in that, whether the PRACH configuration information of judging described homogeneous-frequency adjacent-domain and a described PRACH configuration information identical comprising:
Determine first set of the logic root sequence of described homogeneous-frequency adjacent-domain according to the logic root sequence index u in the PRACH configuration information of described homogeneous-frequency adjacent-domain, circulation skew Ncs and sub-district high-speed mobile attribute;
Determine second set of the logic root sequence of described first sub-district according to the logic root sequence index u in the described PRACH configuration information, circulation skew Ncs and sub-district high-speed mobile attribute;
If there are not common factor in described first set and described second set, determine that then the PRACH configuration information of described homogeneous-frequency adjacent-domain is different with a described PRACH configuration information;
If existing, described first set and described second set occur simultaneously, then skew determines that described homogeneous-frequency adjacent-domain sends the 3rd set of the time-frequency domain position that Access Preamble sequence at random uses according to the configuration index in the PRACH configuration information of described homogeneous-frequency adjacent-domain and frequency domain position, determines that according to the configuration index in the described PRACH configuration information and frequency domain position skew described first sub-district sends the 4th set of the time-frequency domain position that Access Preamble sequence at random uses;
If there are not common factor in described the 3rd set and described the 4th set, the PRACH configuration information of then determining described homogeneous-frequency adjacent-domain is different with a described PRACH configuration information, if described the 3rd set and described the 4th set exist occur simultaneously, determine that then the PRACH configuration information of described homogeneous-frequency adjacent-domain is identical with a described PRACH configuration information.
6. according to each described method in the claim 1 to 5, it is characterized in that described PRACH configuration information comprises:
Configuration index, the logic root sequence index u that is used to produce Access Preamble sequence at random and circulation skew Ncs, sub-district high-speed mobile attribute, frequency domain position skew.
7. the processing method of a Physical Random Access Channel PRACH configuration information is applied to comprise the communication system of first evolution base station and second evolution base station of homogeneous-frequency adjacent-domain it is characterized in that described method comprises:
Described second evolution base station receives the PRACH configuration information from described first evolution base station, and wherein, described PRACH configuration information is the PRACH configuration information of the Serving cell in described first evolution base station.
8. method according to claim 7 is characterized in that, described first evolution base station sends described PRACH configuration information by one of following message to described second evolution base station:
X2 sets up request message, neighbor cell configuration information updating message.
9. method according to claim 7, it is characterized in that, described first evolution base station is set up response message by X2 and is sent described PRACH configuration information to described second evolution base station, before the described PRACH configuration information of described second evolution base station reception from described first evolution base station, described method also comprises:
Described second evolution base station sends X2 to described first evolution base station and sets up request message.
10. method according to claim 7, it is characterized in that, described first evolution base station sends described PRACH configuration information by the evolution base station configuration update message to described second evolution base station, wherein, described PRACH configuration information is the PRACH configuration information of the sub-district of config update in described first evolution base station.
11. method according to claim 7 is characterized in that, after the described PRACH configuration information of described second evolution base station reception from described first evolution base station, described method also comprises:
Described second evolution base station judges in the Serving cell of this base station whether have predetermined cell, and wherein, the PRACH configuration information of described predetermined cell is identical with the described PRACH configuration information that receives;
If exist, then described first evolution base station is provided with and the different PRACH configuration information of described PRACH configuration information that receives for described sub-district again.
12. method according to claim 11 is characterized in that, judges the PRACH configuration information of described predetermined cell and identical the comprising of described PRACH configuration information that receives:
Determine first set of the logic root sequence of described predetermined cell according to the logic root sequence index u of the sub-district in the PRACH configuration information of described predetermined cell, circulation skew Ncs and sub-district high-speed mobile attribute;
Determine second set of the logic root sequence of this sub-district according to the logic root sequence index u of the sub-district in the described PRACH configuration information that receives, circulation skew Ncs and sub-district high-speed mobile attribute;
Described first evolution base station judges that whether described first set and described second set exist common factor, if there is no, determine that then the PRACH configuration information of described predetermined cell is different with the described PRACH configuration information that receives;
If exist, then determine that according to the configuration index of the sub-district in the PRACH configuration information of described predetermined cell and frequency domain position skew described predetermined cell sends the 3rd set of the time-frequency domain position that Access Preamble sequence at random uses, determine that according to the configuration index of the sub-district in the described PRACH configuration information that receives and frequency domain position skew this sub-district sends the 4th set of the time-frequency domain position that Access Preamble sequence at random uses;
Judge whether described the 3rd set and described the 4th set exist common factor, if there is no, the PRACH configuration information of then determining described predetermined cell is different with the described PRACH configuration information that receives, if exist, determine that then the PRACH configuration information of described predetermined cell is identical with the described PRACH configuration information that receives.
13., it is characterized in that described PRACH configuration information comprises according to each described method in the claim 7 to 12:
Configuration index, the logic root sequence index u that is used to produce Access Preamble sequence at random and circulation skew Ncs, sub-district high-speed mobile attribute, frequency domain position skew.
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