CN101553020B - Closed user group subdistrict access method based on evolution base station under connecting mode - Google Patents
Closed user group subdistrict access method based on evolution base station under connecting mode Download PDFInfo
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- CN101553020B CN101553020B CN2008100877925A CN200810087792A CN101553020B CN 101553020 B CN101553020 B CN 101553020B CN 2008100877925 A CN2008100877925 A CN 2008100877925A CN 200810087792 A CN200810087792 A CN 200810087792A CN 101553020 B CN101553020 B CN 101553020B
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Abstract
The invention discloses a closed user group subdistrict access method based on an evolution base station under a connecting mode, which comprises the steps: a terminal accessible closed user group subdistrict list is obtained by the evolution base station; a terminal measures neighboring subdistrict signals and reports a measuring report to the evolution base station, and the measuring report comprises neighboring subdistrict marks; and when the evolution base station ensures that the closed user group subdistrict corresponding to the neighboring subdistrict marks is the subdistrict indicated in the terminal accessible closed user group subdistrict list, the terminal is allowed to be accessed into the closed user group subdistrict. The method can access and control the terminal which movesto the closed user group subdistrict in a connecting state based on the evolution base station. In the method, when the objective closed user group subdistrict can not be ensured in the evolution bas e station, the terminal is used for reading tracking area marks of the objective closed user group subdistrict to simplify a processing process.
Description
Technical field
The present invention relates to field of wireless communication; Relate in particular to LTE (Long Term Evolution; Long Term Evolution) in the system; UE (User Equipment, portable terminal) under RRC (Radio Resource Control, the Radio Resource control) connection status is got into the connection control method of CSG (Closed Subscriber Group closed user group or authorized users group) sub-district.
Background technology
As shown in Figure 1, mainly (CoreNetwork CN) forms cellular radio communication system by terminal, base station and core net.The network that the base station is formed is called wireless access network, and (Radio Access Network RAN) is responsible for the Access Layer affairs, such as the management of Radio Resource etc.Can there be physics or connection in logic according to actual conditions between the base station, like being connected of the base station among Fig. 11 and base station 2 or base station 3.Each base station can be connected with one or more than one core net node.Core net is responsible for the Non-Access Stratum affairs, such as position renewal etc.The terminal is meant the various device that can carry out communication with the cellular radio communication network, such as mobile phone, personal digital assistant or notebook computer etc.
If an operator is in the indoor sub-district that disposes the LTE connecting system of family; In order to prevent owing to cross the multi-user and insert these indoor cell the service quality of system is exerted an influence; The UE that so just needs restriction only to belong to particular demographic can be linked into this sub-district; This sub-district that allows certain customers to insert is referred to as the CSG sub-district.And for this CSG sub-district, what its charging maybe be than macrocell is cheap.
A CSG zone is with a TA ID ((Tracking Area ID, tracing area sign) expression.CSG zone has comprised or one group of sub-district that the user that can only allow to belong to particular group inserts.A CSG zone possibly be made up of the single subdistrict that family uses, and also possibly be made up of a plurality of sub-districts in the campus.A sub-district can only belong to certain TA or CSG, and TA can not overlap each other, and CSG can not overlap each other.TA ID is through TAC (Tracking Area Code; Tracking Area Code) and PLMN (Public Land Mobile Network; Public land mobile network) identifies; When network is shared, TAC of Cell Broadcast CB and a plurality of PLMN ID, whether eNB (evolution base station) is the CSG sub-district at the broadcast cell of eating dishes without rice or wine.
Preserve the tabulation whitelist (white list tabulation) that allows to insert the CSG sub-district in the UE, this whitelist is made up of the TA ID set in the CSG zone that UE can insert.Have only the TA ID that includes certain CSG sub-district as the TA IDwhitelist of UE, UE could allow to be linked into this CSG sub-district.
When UE is in RRC_IDLE (Radio Resource control is idle) state; Its CSG cell mobility control is based on UE's; UE judges with the system message of reading certain CSG sub-district whether certain CSG sub-district is suitable resident according to the CSG whitelist that preserves; Have only when this CSG sub-district belongs to its whitelist, the base station just allows UE cell selecting/gravity treatment to this CSG sub-district.When UE is in idle condition, in general UE always can read the system message of adjacent cell; And when UE is in RRC_CONNECTED (Radio Resource control connection) state; How to carry out also not definition of CSG sub-district access control, the system message that UE reads adjacent cell needs the long period, if UE unilaterally reads the system message of adjacent cell; ENB can't confirm dispatching process; And possibly in the time of UE read system message, send business datum or other control information to UE, cause UE and eNB both sides' process inconsistent, thereby current communication process is produced very big influence.
Summary of the invention
The technical problem that the present invention will solve provides under the connection mode closed user group subdistrict access method based on evolution base station, carries out the access control based on eNB to being in the terminal that connection status is moved to the CSG sub-district.
In order to address the above problem, the invention provides under a kind of connection mode based on the closed user group subdistrict access method of evolution base station, comprising: but evolution base station obtains the access into closed subscriber group cell tabulation at terminal; The terminal is measured the signal of adjacent cell, to the evolution base station reporting measurement reports, comprises the adjacent cell sign in the said measurement report; When evolution base station confirms that but the corresponding closed user group cell of said adjacent cell sign is the sub-district of indicating in the access into closed subscriber group cell tabulation at terminal, allow said terminal to insert this closed user group cell.
Further, when the current area that said evolution base station is judged said terminal has the closed user group adjacent area, but obtain the access into closed subscriber group cell tabulation at terminal.
Further, but said evolution base station obtains the mode of terminal access into closed subscriber group cell tabulation is a kind of in the following mode: obtain from mobile management entity, obtain, obtain from other evolution base station through the X2 mouth from said end.
Further; Said evolution base station is according to the unique definite closed user group cell of said adjacent cell sign; And but this closed user group cell allows said terminal to be linked into this sub-district when being the sub-district in the access into closed subscriber group cell tabulation at said terminal.
Further; Said evolution base station is according to the unique definite closed user group cell of said adjacent cell sign; When but this closed user group cell is not the sub-district in the access into closed subscriber group cell tabulation at said terminal, do not allow said terminal to be linked into this sub-district.
Further; When said evolution base station is confirmed a plurality of closed user group cell according to said adjacent cell sign; The tracing area of indicating said terminal to read its target closed user group cell identifies and is sent to said evolution base station; When said evolution base station judges that according to said tracing area sign but the target closed user group cell at terminal is the sub-district in the access into closed subscriber group cell tabulation of terminal, allow said terminal to be linked into its target closed user group cell.
Further; When said evolution base station is confirmed a plurality of closed user group cell according to said adjacent cell sign; The tracing area of indicating said terminal to read its target closed user group cell identifies and is sent to said evolution base station; When said evolution base station judges that according to said tracing area sign but the target closed user group cell at terminal is not the sub-district in the access into closed subscriber group cell tabulation of terminal, do not allow said terminal to be linked into its target closed user group cell.
Further, said adjacent cell is designated the Access Layer sign of adjacent cell.
Further, said terminal obtains the tracing area sign of its target closed user group cell through reading the adjacent cell broadcast.
Further, said method is applicable to long evolving system.
Through method of the present invention, can carry out access control to being in the terminal that connection status is moved to the CSG sub-district based on eNB.In the method, only when eNB can't confirm target CS G sub-district, just make UE remove to read the TA ID of target CS G sub-district, simplified processing procedure.
Description of drawings
Fig. 1 is the structure chart of cellular radio communication system;
Fig. 2 is based on the flow chart of the closed user group subdistrict access method of evolution base station among the present invention;
Fig. 3 is the network topological diagram of closed user group cell in the specific embodiment.
Embodiment
Among the present invention, the closed user group subdistrict access method based on evolution base station under the connection mode comprises the steps:
Step 201 during the UE access base station, is obtained the CSG cell list that UE can insert when the current area of base station judges UE has the CSG adjacent area;
The base station obtains a kind of that the mode of the CSG whitelist that inserts of this UE can be in the following mode: the base station is from MME (Mobility Management Entity; Mobile management entity) locates to obtain; The base station obtains from UE, and the base station obtains from other eNB through the X2 mouth.
In this step, when the current area of base station judges UE has the CSG adjacent area, just remove to obtain UE and can insert CSG sub-district whitelist, can save the message traffic of system.
Step 202, UE measures the signal of adjacent cell according to the measuring control information of base station configuration, and to the base station reporting measurement reports, comprises the adjacent cell sign in the measurement report, and wherein adjacent cell is represented with physical layer identifications PHY ID;
Wherein adjacent cell can be used GCID, the expression of Access Layers (AS) such as GCID and PHY ID sign, and comparatively speaking, the field length of PHY ID is shorter than the field length of above-mentioned other sign, takies in order to reduce interface-free resources, generally uses PHY ID.UE just can be known the PHY ID of CSG sub-district through cell search process.
After UE measure to accomplish, when measurement event triggers to the base station reporting measurement reports.
The adjacent cell sign that comprises in the measurement report that UE reports can comprise the macrocell sign, also can comprise the CSG cell ID, and the base station can identify according to macrocell, carries out the control that UE inserts corresponding macrocell.
Step 203, the measurement report that the base station reports according to UE confirms that CSG sub-district that wherein PHY ID is corresponding is UE can insert the sub-district of indicating in the CSG cell list time, allows UE to insert this sub-district, flow process finishes.
If the sub-district PHY ID that eNB reports according to UE can uniquely confirm a CSG sub-district, and this CSG sub-district is that UE can insert the sub-district among the whitelist of CSG sub-district, then allows UE to be linked into this sub-district;
If the sub-district PHY ID that eNB reports according to UE can uniquely confirm can not insert the sub-district among the whitelist of CSG sub-district but this CSG sub-district is not UE in a CSG sub-district, then eNB ignores the measurement report of UE; Do not allow UE to be linked into this sub-district;
If eNB finds a plurality of CSG sub-district according to the sub-district PHY ID that reports; Then eNB indication UE reads the TA ID of its target CS G sub-district and is sent to eNB; The TA ID that eNB obtains according to UE judges that its target CS G sub-district is UE can insert the sub-district among the whitelist of CSG sub-district the time, allows UE to be linked into the corresponding target CS G sub-district of this TA ID;
If eNB can find a plurality of CSG sub-district according to the sub-district physical I D that reports; Then eNB indication UE reads the TA ID of its target CS G sub-district and is sent to eNB; The TA ID that eNB obtains according to UE judges that its target CS G sub-district is not that UE is can insert the sub-district among the whitelist of CSG sub-district the time; The measurement report of ignoring UE does not allow UE to be linked into this sub-district.
In specific embodiment one, 6 CSG Microcells are arranged in the macrocell as shown in Figure 2, its TAID and PHY ID are as shown in the figure.UE connects among the process of setting up and the figure macrocell through RRC and sets up RRC and be connected, and eNB passes through the RRC connection procedure, and the CSG whitelist that obtains UE is { TA ID=5, TA ID=6}.
UE gets into the coverage of CSG Cell# 5, and CSG Cell# 5 signal satisfies measures criterion, and UE measures the signal of its adjacent cell, sends measurement report to eNB, and the PHY ID that in measurement report, carries the CSG sub-district is 18;
ENB searches it in abutting connection with the CSG sub-district according to the PHY ID=18 of CSG sub-district, finds that unique CSG sub-district is CSG Cell# 5, and knows that TA ID is 9; The CSG whitelist{TAID=5 that does not belong to UE; TA ID=6}, eNB ignore this measurement report, do not allow UE to insert.
In specific embodiment two, 6 CSG Microcells are arranged in the macrocell as shown in Figure 2, its TAID and PHY ID are as shown in the figure.UE switches entering macrocell shown in Figure 2 through handoff procedure, and the eNB that eNB belonged to from UE through X2 interface originally obtains the CSG whitelist{TAID=5 of this UE, TA ID=6}.
UE gets into the coverage of CSG Cell# 6, and CSG Cell# 6 signal satisfies measures criterion, and UUE measures the signal of its adjacent cell, sends measurement report to eNB, and in report, carries the PHY ID=20 of CSG sub-district;
ENB searches it in abutting connection with the CSG sub-district according to the PHY ID=20 of CSG sub-district, finds that unique CSG sub-district is CSG Cell# 6, and knows that TA ID is 5, belongs to the CSG whitelist{TAID=5 of UE, and TA ID=6}, eNB allow UE to switch to CSG Cell# 6.
In specific embodiment three, 6 CSG Microcells are arranged in the macrocell as shown in Figure 2, its TAID and PHY ID are as shown in the figure.UE macrocell initiate new call out or switch get into macrocell, the eNB of macrocell does not have the CSG whitelist information of UE, macrocell eNB is through the S1 interface, obtains the CSG whitelist{TA ID=5 of UE, TA ID=6} from MME.
UE gets into the coverage of CSG Cell# 3, and CSG Cell# 3 signal satisfies measures criterion, and UE measures the signal of its adjacent cell, sends measurement report to eNB, carries the PHYID=34 of CSG sub-district;
ENB is according to the PHY ID=34 that reports, and being not sure of UE is that CSG Cell# 1 or CSGCell#3 satisfy the measurement criterion, and eNB sends measurement configuration message to UE, and indication UE reads the TA ID of CSG sub-district; The TA ID that UE reads CSG Cell# 3 is 9, is 9 to the TA ID of eNB report CSG sub-district, and eNB judges that this TA ID does not belong to CSG whitelist, the UE access failure, and notice eNB returns to normal measurement configuration.
In specific embodiment four, 6 CSG Microcells are arranged in the macrocell as shown in Figure 2, its TAID and PHY ID are as shown in the figure.UE macrocell initiate new call out or switch get into macrocell, macrocell eNB does not have the CSG whitelist information of UE, macrocell eNB is through the S1 interface, obtains the CSG whitelist{TA ID=5 of UE, TA ID=6} from MME.
UE gets into the coverage of CSG Cell# 1, and CSG Cell# 1 signal satisfies measures criterion, and UE measures the signal of its adjacent cell, sends measurement report to eNB, and in report, carries the PHY ID=34 of CSG sub-district;
ENB is according to the PHY ID=34 that reports, and being not sure of UE is that CSG Cell# 1 or CSGCell#3 satisfy the measurement criterion, and eNB sends measurement configuration message to UE; Indication UE reads the TA ID of CSG sub-district; It is 5 that UE reads TA ID, is 5 to the TA ID of eNB report CSG sub-district, and eNB judges that this TA ID belongs to CSG whitelist; Confirm that UE gets into the coverage of CSG Cell# 1, allow UE to switch to CSG Cell# 1.
Said method is applicable to the LTE system.
In the said method, UE can be known the PHY ID of CSG sub-district through short cell search process consuming time, and only when eNB can't confirm target CS G sub-district according to the PHY ID that receives, eNB just made UE read the TA ID of target CS G sub-district, has simplified processing procedure; And eNB indication UE reads the TA ID of target CS G sub-district, and it is consuming time longer that UE reads adjacent cell broadcast process, also can not influence the dispatching process of eNB to this UE, guarantees that communication process is normal.
The present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art are when making various corresponding changes and distortion according to the present invention, and these change and be out of shape the protection range that all should belong to the appended claim of the present invention accordingly.
Claims (8)
- Under the connection mode based on the closed user group subdistrict access method of evolution base station, it is characterized in that,But evolution base station obtains the access into closed subscriber group cell tabulation at terminal;The terminal is measured the signal of adjacent cell, to the evolution base station reporting measurement reports, comprises the adjacent cell sign in the said measurement report;When evolution base station confirms that but the corresponding closed user group cell of said adjacent cell sign is the sub-district of indicating in the access into closed subscriber group cell tabulation at terminal, allow said terminal to insert this closed user group cell;When said evolution base station is confirmed a plurality of closed user group cell according to said adjacent cell sign; The tracing area of indicating said terminal to read its target closed user group cell identifies and is sent to said evolution base station; When said evolution base station judges that according to said tracing area sign but the target closed user group cell at terminal is the sub-district in the access into closed subscriber group cell tabulation of terminal, allow said terminal to be linked into its target closed user group cell; When said evolution base station judges that according to said tracing area sign but the target closed user group cell at terminal is not the sub-district in the access into closed subscriber group cell tabulation of terminal, do not allow said terminal to be linked into its target closed user group cell.
- 2. the method for claim 1 is characterized in that,When the current area that said evolution base station is judged said terminal has the closed user group adjacent area, but obtain the access into closed subscriber group cell tabulation at terminal.
- 3. the method for claim 1 is characterized in that,It is a kind of in the following mode that but said evolution base station obtains the mode of terminal access into closed subscriber group cell tabulation: obtain from mobile management entity, obtain from said end, obtain from other evolution base station through the X2 mouth.
- 4. the method for claim 1 is characterized in that,Said evolution base station is confirmed a closed user group cell according to said adjacent cell sign is unique, but and this closed user group cell when being the sub-district in the access into closed subscriber group cell tabulation at said terminal, allow said terminal to be linked into this sub-district.
- 5. the method for claim 1 is characterized in that,Said evolution base station is confirmed a closed user group cell according to said adjacent cell sign is unique, but when this closed user group cell is not the sub-district in the access into closed subscriber group cell tabulation at said terminal, does not allow said terminal to be linked into this sub-district.
- 6. like claim 1,4 or 5 described methods, it is characterized in that,Said adjacent cell is designated the Access Layer sign of adjacent cell.
- 7. the method for claim 1 is characterized in that,Said terminal obtains the tracing area sign of its target closed user group cell through reading the adjacent cell broadcast.
- 8. the method for claim 1 is characterized in that,Said method is applicable to long evolving system.
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