CN105282797B - A kind of method and device of closed subscriber group cell gravity treatment - Google Patents
A kind of method and device of closed subscriber group cell gravity treatment Download PDFInfo
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Abstract
The invention discloses a kind of methods of closed user group (CSG) cell reselection, it include: that UE matches the adjacent area CGI list in the CGI information for the macrocell itself the being resident CSG cell information resident with UE history, when successful match, the corresponding CSG cell frequency point of the adjacent area CGI list of successful match is measured；When determining that the physical district ID for measuring and obtaining is within the scope of the CSG physical district ID in the CSG cell information that UE history is resident, assessment is measured to the physical area, and when determining the physical area coincidence measurement evaluation condition, select the physical area for persistent district.The present invention further simultaneously discloses a kind of device of CSG cell gravity treatment.
Description
Technical Field
The present invention relates to the technical field of Long Term Evolution (LTE) mobile communications, and in particular, to a method and an apparatus for Closed Subscriber Group (CSG) cell reselection.
Background
CSG is a concept introduced for a home base station, a group of users using the home base station is divided into a plurality of user groups, and users qualified to provide services using the home base station are considered as members of the user groups, and the user groups formed by the members are called closed user groups.
CSG cells are typically referred to as outdoor macro cells, i.e.: the non-CSG cell is supplemented to enhance indoor coverage and reduce load of an outdoor macro cell to provide higher wireless service quality, so that CSG cell deployment is generally performed under coverage of an existing macro cell, however, users subscribing to a femtocell in the same macro cell coverage also dynamically change, unsubscribe users and newly added users, a coverage topology of the femtocell changes very frequently relative to the coverage of the macro cell, and all CSG cells in the macro cell coverage need to be added to a neighboring cell relationship of the macro cell and change of the neighboring cell is timely managed, which may cause continuous huge workload.
Since The macro cell does not have The neighboring cell relation information of The CSG cell in The coverage area, a User Equipment (UE) cannot automatically reselect The CSG cell according to a method for performing reselection using The neighboring cell information configuration established by a third Generation partnership project (3 GPP) protocol.
Disclosure of Invention
In view of this, embodiments of the present invention are expected to provide a method and an apparatus for reselecting a CSG cell, which can improve a success rate of automatically reselecting the CSG cell by a UE and prolong idle-state standby time of the UE.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the embodiment of the invention provides a method for reselecting a CSG cell, which comprises the following steps:
the UE matches Global Cell identity (CGI) information of a resident macro Cell with a CGI list of a neighboring Cell in CSG Cell information of historical residence of the UE, and when the matching is successful, a CSG Cell frequency point corresponding to the CGI list of the successfully matched neighboring Cell is measured;
and when determining that the physical cell IDentity identifier (ID, IDentity) obtained by measurement is within the ID range of the CSG physical cell in the CSG cell information of the historical residence of the UE, performing measurement evaluation on the physical cell, and when determining that the physical cell meets the measurement evaluation conditions, selecting the physical cell as the residence cell.
In the foregoing solution, before the UE matches the CGI information of the macro cell where the UE resides with the neighboring cell CGI list in the CSG cell information where the UE resides in history, the method further includes: and the UE resides in the CSG cell, and acquires and stores the CSG cell frequency point, the ID range of the CSG physical cell and the CGI list of the neighbor cell of the CSG cell.
In the foregoing solution, the obtaining, by the UE, the CSG physical cell ID range and the neighboring cell CGI list of the CSG cell include:
the UE extracts a CSG physical cell ID range in a System Information block type (SIB, System Information Block type)4 and a co-frequency neighbor cell CGI list of the CSG cell, extracts an inter-frequency neighbor cell CGI list of the CSG cell in SIB5, and the co-frequency neighbor cell CGI list of the CSG cell and the inter-frequency neighbor cell CGI list of the CSG cell jointly form a neighbor cell CGI list of the CSG cell;
wherein, the CGI information included in the neighboring cell CGI list of the CSG cell includes: a CELL Public Land Mobile Network identity (PLMN) ID and a CELL identity CELL ID.
In the above scheme, the measurement evaluation conditions are: the physical cell frequency point is a pilot frequency point of the macro cell, or the physical cell frequency point is a same frequency point of the macro cell, and the signal quality of the physical cell is higher than that of the macro cell.
An embodiment of the present invention further provides a CSG cell reselection apparatus, where the apparatus includes: a matching module and a measuring module; wherein,
the matching module is used for matching the CGI information of the macro cell where the UE resides with a neighboring CGI list in the CSG cell information where the UE historically resides, and triggering the measurement module when the matching is successful;
and the measuring module is used for measuring the CSG cell frequency point corresponding to the successfully matched CGI list of the neighboring cell, performing measurement evaluation on the physical cell when the physical cell ID obtained by measurement is determined to be within the CSG physical cell ID range in the CSG cell information of the historical residence of the UE, and selecting the physical cell as the residence cell when the physical cell is determined to meet the measurement evaluation conditions.
In the above scheme, the apparatus further comprises: and the obtaining module is used for obtaining and storing the CSG cell frequency point, the CSG physical cell ID range and the CGI list of the neighboring cell of the CSG cell when the UE resides in the CSG cell.
In the foregoing solution, the obtaining, by the obtaining module, the ID range of the CSG physical cell and the CGI list of the neighboring cell of the CSG cell includes:
the obtaining module extracts a CSG physical cell ID range in SIB4 and a common-frequency neighboring cell CGI list of the CSG cell, and extracts a different-frequency neighboring cell CGI list of the CSG cell in SIB 5; the common-frequency neighboring cell CGI list of the CSG cell and the pilot-frequency neighboring cell CGI list of the CSG cell jointly form a neighboring cell CGI list of the CSG cell;
wherein, the CGI information included in the neighboring cell CGI list of the CSG cell includes: cell PLMN ID and CELLID.
In the above scheme, the measurement evaluation conditions are: the physical cell frequency point is a pilot frequency point of the macro cell, or the physical cell frequency point is a same frequency point of the macro cell, and the signal quality of the physical cell is higher than that of the macro cell.
According to the method and the device for reselecting the CSG cell, provided by the embodiment of the invention, the UE matches the CGI of the resident macro cell with the CGI list of the neighbor cell in the CSG cell information of the historical residence of the UE, and when the matching is successful, the CSG cell frequency point corresponding to the CGI list of the neighbor cell which is successfully matched is measured; and when determining that the measured physical cell ID is within the CSG physical cell ID range in the CSG cell information of the UE historical residence, performing measurement evaluation on the physical cell, and when determining that the physical cell meets the measurement evaluation conditions, selecting the physical cell as the residence cell. Therefore, when the UE approaches the CSG cell each time, the CSG cell can be automatically reselected under the condition that a user does not sense, the success rate of automatically reselecting the CSG cell by the UE is improved, and the power consumption of the UE is reduced, so that the idle state standby time of the UE is prolonged.
Drawings
Fig. 1 is a flowchart illustrating a method for reselecting a CSG cell according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a method for reselecting a CSG cell according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a topological relationship between a macro cell and a CSG cell according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a method for reselecting a CSG cell according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating a method for reselecting a quad CSG cell according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a CSG cell reselection apparatus according to an embodiment of the present invention.
Detailed Description
Fig. 1 is a flowchart illustrating a CSG cell reselection method according to an embodiment of the present invention, as shown in fig. 1, the CSG cell reselection method according to this embodiment includes:
step 101: the UE matches the CGI information of the resident macro cell with a neighboring cell CGI list in the CSG cell information of the UE historical resident, and when the matching is successful, the CSG cell frequency point corresponding to the neighboring cell CGI list which is successfully matched is measured;
before this step, the method further comprises: the UE resides in the CSG cell, acquires the related information of the CSG cell, stores the related information of the CSG cell into the CSG cell information (CsgHistoryInfo) which is resided by the UE in history, and writes the related information into a nonvolatile memory at the same time, so that the related information of the CSG cell cannot be lost after the UE is powered off and can be read and used after the UE is powered on next time;
wherein the relevant information of the CSG cell comprises: a CSG cell frequency point (CsgEarfcn), a CSG ID, a PLMN ID of the CSG cell, a CSG physical cell ID range (CsgPhysCellIdRange) and a CGI list of the neighbor cell of the CSG cell;
correspondingly, the information of the CSG cell where the UE resides historically includes: the UE comprises a CSG cell frequency point where the UE is resided historically, a CSGID, a PLMNID of the CSG cell, an ID range of a CSG physical cell and a CGI list of a neighboring cell of the CSG cell;
here, the UE first resides in a CSG cell, and requires the user to reside in an allowed CSG cell in a manual CSG selection manner; or, the UE is set to be in an automatic CSG selection mode, the CSG cell is the strongest coverage after the UE is started, and the CSG cell with the strongest coverage is selected to reside in the initial residence process of the UE after the UE is started;
the UE obtaining the CSG physical cell ID range and the neighboring CGI list of the CSG cell includes:
the UE extracts a CSG physical cell ID range in SIB4 and a co-frequency neighboring cell CGI list of the CSG cell, and extracts a co-frequency neighboring cell CGI list of the CSG cell in SIB 5; the common-frequency neighboring cell CGI list of the CSG cell and the pilot-frequency neighboring cell CGI list of the CSG cell jointly form a neighboring cell CGI list of the CSG cell, the neighboring cell CGI list of the CSG cell can store neighboring cell CGI information of N CSG cells at most, N is a positive integer, and the value of N can be set according to actual conditions;
here, the CGI information included in the neighboring cell CGI list of the CSG cell includes: cell PLMN ID and CELLID.
Further, before the UE acquires the ID range of the CSG physical cell and the CGI list of the neighboring cell of the CSG cell, the method further includes: respectively adding cell identity (cellIdentity) cells in an SIB4 and an SIB5, and setting the cell identity cells to be only a necessary option for a CSG cell, so that the configuration of system information SIB4 of the conventional common macro cell is not affected, when the CSG cell is deployed, adding the CGI information of the same-frequency neighboring cell of the CSG cell to a same-frequency neighboring cell list in the SIB4, and adding the CGI information of the different-frequency neighboring cell of the CSG cell to the different-frequency neighboring cell list in the SIB 5; the same-frequency neighbor list structure of the SIB4 and the different-frequency neighbor list structure of the SIB5 after the cell identity information element is added include: a physcellld cell, a q-OffsetCell cell, and a cellIdentity cell;
here, it should be noted that the operation before the UE selects and accesses the macro cell is only performed during the initial use of the CSG cell reselection method of the present invention, that is, only the UE needs to store the relevant information of the CSG cell, and the UE can be directly used in the subsequent CSG cell reselection.
Further, the UE matches the CGI information of the macro cell with a neighboring cell CGI list in CSG cell information that the UE resides in history, and if the matching is successful, it indicates that the CGI information of the macro cell is stored in the neighboring cell CGI list that is successfully matched, which may indicate that the macro cell is a neighboring cell of the CSG cell corresponding to the neighboring cell CGI list that is successfully matched;
the measuring the frequency point of the CSG cell corresponding to the neighboring cell CGI list that is successfully matched includes: and detecting the physical cell ID on the CSG cell frequency point.
Step 102: when determining that the measured physical cell ID is in the CSG physical cell ID range in the CSG cell information of the UE historical residence, performing measurement evaluation on the physical cell, and when determining that the physical cell meets the measurement evaluation conditions, selecting the physical cell as the residence cell;
here, when the UE detects that a physical cell ID exists on the CSG cell frequency point and determines that the measured physical cell ID is within the CSG physical cell ID range in the CSG cell information that the UE resides in history, it indicates that the physical cell is a CSG cell, and measurement and evaluation on the physical cell can be started;
the measurement evaluation conditions are: the physical cell frequency point is a pilot frequency point of the macro cell, or the physical cell frequency point is a same frequency point of the macro cell, and the signal quality of the physical cell is higher than that of the macro cell.
Fig. 2 is a flowchart illustrating a method for reselecting a CSG cell according to an embodiment of the present invention, where in the embodiment of the present invention, a UE already resides in a CSG cell, and stores relevant information of the CSG cell into CSG cell information in which the UE resides in history, and the UE is in an idle state and will select a macro cell with a better signal as the UE moves, as shown in fig. 2, the method for reselecting a CSG cell according to this embodiment includes:
step 201: UE selects and accesses to a macro cell;
here, the UE may select and access to the macro cell using an existing access method.
Step 202: matching the CGI information of the macro cell with a neighboring cell CGI list in CSG cell information of UE historical residence, judging whether the matching is successful, and executing step 203 when the matching is determined to be successful; if the matching fails, go to step 207;
here, the CGI information of the macro cell is matched with a neighboring cell CGI list in CSG cell information that the UE resides in history, and if the matching is successful, it is indicated that the CGI information of the macro cell is stored in the neighboring cell CGI list that is successfully matched, which may indicate that the macro cell is a neighboring cell of the CSG cell corresponding to the neighboring cell CGI list that is successfully matched.
Step 203: measuring the CSG cell frequency point corresponding to the successfully matched CGI list of the neighboring cell, judging whether the measured physical cell ID is in the CSG physical cell ID range in the CSG cell information of the UE historical residence, and if so, executing the step 204; otherwise, go to step 207;
here, when detecting that the physical cell ID on the CSG cell frequency point corresponding to the neighboring cell CGI list that is successfully matched is within the CSG physical cell ID range, it indicates that the physical cell is a CSG cell, and measurement and evaluation on the physical cell can be started.
Step 204: judging whether the physical cell is the co-frequency point of the macro cell, if so, executing step 205; if not, step 206 is performed.
Step 205: judging whether the signal quality of the physical cell is higher than that of the macro cell, if so, executing step 206; otherwise, step 207 is performed.
Step 206: the UE selects the physical cell as a resident cell;
here, the specific operation of the UE camping on the physical cell includes reading cell system information, matching CSG ID, and the like.
Step 207: ending the processing flow;
here, the UE may perform measurement evaluation and reselection process of the macro cell common frequency/different frequency without reselecting the CSG cell.
Fig. 3 is a schematic view of a topological relationship between a macro CELL and a CSG CELL according to an embodiment of the present invention, as shown in fig. 3, the topological relationship includes a CSG CELL (CELL _ CSG) and three macro CELLs (CELL _1, CELL _2, and CELL _3), and information of each CELL is shown in the following table:
TABLE 1
In fig. 3, three large hexagons respectively represent the wireless coverage ranges of CELL _1, CELL _2, and CELL _3, and a small hexagon represents the wireless coverage range of CELL _ CSG, where CELL _ CSG is the same frequency as CELL _1, CELL _ CSG is the different frequency from CELL _2, one part of the wireless coverage range of CELL _ CSG overlaps CELL _1, and the other part overlaps CELL _2, so that when configuring CELL _ CSG CELL neighboring CELL information, the same-frequency neighboring CELL list of SIB4 includes cellIdentity1 in the CGI of the same-frequency neighboring CELL _1, and the different-frequency neighboring CELL list of SIB5 includes cellIdentity2 in the CGI of the same-frequency neighboring CELL _2, and further, when the UE resides in CELL _ CSG, the CSG CELL information where the UE resides in history includes: the CELL _ CSG frequency point, the PLMNID, the CSG ID, the ID range of the CSG physical CELL and the CGI list of the adjacent CELL of the CELL _ CSG; the neighboring CELL CGI list of CELL _ CSG includes CGI information of macro CELLs CELL _1 and CELL _ 2.
Fig. 4 is a flowchart illustrating a method for reselecting a CSG CELL according to an embodiment of the present invention, and referring to fig. 3, in an embodiment of the present invention, a UE already resides in a CELL _ CSG and stores relevant information of the CELL _ CSG into CSG CELL information in which the UE has historically resided, and the UE is in an idle state, sequentially moves to CELL _1, CELL _3, and CELL _2 in order, and moves to CELL _ CSG again, as shown in fig. 4, the method for reselecting a CSG CELL according to this embodiment includes:
step 401: the UE moves and resides in a macro CELL CELL _ 1;
here, the UE may camp on the macro CELL _1 using the existing access method.
Step 402: matching the CGI information of the macro CELL CELL _1 with a neighboring CELL CGI list in the CSG CELL information of UE historical residence;
here, since the CGI of the macrocell CELL _1 is stored in the neighboring CELL CGI list of the CELL _ CSG, successful matching indicates that the CELL _1 is a neighboring CELL of the CELL _ CSG.
Step 403: measuring the CELL _ CSG frequency point, and judging whether the physical CELL ID obtained by measurement is in the CSG physical CELL ID range in the CSG CELL information of the UE historical residence;
here, since the CELL ID of CELL _ CSG, whose signal quality gradually weakens, is measured, the CELL ID of CELL _ CSG is within the CSG physical CELL ID range.
Step 404: judging whether the CELL _ CSG frequency point is the same frequency point of the CELL _ 1;
here, the CELL _ CSG frequency point is an intra-frequency point of the CELL _ 1.
Step 405: judging whether the signal quality of the CELL _ CSG is higher than the signal quality of the CELL _ 1;
here, since the UE has moved from CELL _ CSG to CELL _1, the signal quality of CELL _1 is higher than that of CELL _ CSG, and therefore, the UE does not reselect to CELL _ CSG.
Step 406: the UE moves and resides in a macro CELL CELL _ 3;
here, the UE may camp on the macro CELL _3 using the existing access method.
Step 407: matching the CGI of the macro CELL CELL _3 with a neighboring CELL CGI list in CSG CELL information of historical residence of UE;
here, since the CGI of CELL _ CSG is not included in the CGI list of the neighboring CELL of CELL _ CSG, the matching fails, indicating that the macro CELL _3 is not a neighboring CELL of CELL _ CSG, and therefore, the UE does not reselect to the CELL _ 3.
Step 408: the UE moves and resides in a macro CELL CELL _ 2;
here, the UE may camp on the macro CELL _2 using the existing access method.
Step 409: matching the CGI of the CELL _2 with a neighboring CELL CGI list in CSG CELL information of historical residence of the UE;
here, since the CGI of the macrocell CELL _2 is stored in the neighboring CELL CGI list of the CELL _ CSG, a successful matching indicates that the macrocell CELL _2 is a neighboring CELL of the CELL _ CSG.
Step 410: measuring the CELL _ CSG frequency point, and judging whether the physical CELL ID obtained by measurement is in the CSG physical CELL ID range in the CSG CELL information of the UE historical residence;
here, since the signal of CELL _ CSG gradually becomes better during the movement of the UE from the coverage of the macro CELL _2 to the coverage of CELL _ CSG, the UE detects the physical CELL ID of CELL _ CSG within the CSG physical CELL ID range in the CSG CELL information where the UE has historically camped at f 1.
Step 411: judging whether the CELL _ CSG is a same-frequency point of the CELL _ 2;
here, the CELL _ CSG frequency point is an inter-frequency point of the CELL _ 2.
Step 412: and the UE selects the CELL _ CSG as a resident CELL.
Fig. 5 is a flowchart illustrating a method for reselecting a four CSG CELL according to an embodiment of the present invention, and with reference to fig. 3, in the embodiment of the present invention, a UE already resides in a CSG CELL, and stores relevant information of the CSG CELL into CSG CELL information in which the UE has historically resided, and the UE is in an idle state, sequentially moves to CELL _2, CELL _3, and CELL _1 in sequence, and moves to CELL _ CSG again, as shown in fig. 5, the method for reselecting a CSG CELL according to this embodiment includes:
step 501: the UE moves and resides in a macro CELL CELL _ 2;
here, the UE may camp on the macro CELL _2 using the existing access method.
Step 502: matching the CGI of the macro CELL CELL _2 with a neighboring CELL CGI list in CSG CELL information of historical residence of UE;
here, since the CGI of the macrocell CELL _2 is stored in the neighboring CELL CGI list of the CELL _ CSG, successful matching indicates that the CELL _2 is a neighboring CELL of the CELL _ CSG.
Step 503: measuring the CELL _ CSG frequency point, and judging whether the physical CELL ID obtained by measurement is in the CSG physical CELL ID range in the CSG CELL information of the UE historical residence;
here, since the physical CELL ID of CELL _ CSG, whose signal quality gradually weakens, is measured, the physical CELL ID of CELL _ CSG is within the CSG physical CELL ID range.
Step 504: judging whether the CELL _ CSG frequency point is the same frequency point of the CELL _ 2;
here, the CELL _ CSG frequency point is an inter-frequency point of the CELL _ 2.
Step 505: the UE selects the CELL _ CSG as a resident CELL;
here, as the UE moves away from CELL _ CSG, when CELL _ CSG is not measured on the frequency point of CELL _ CSG, the CELL _ CSG is not reselected.
Step 506: the UE moves and resides in a macro CELL CELL _ 3;
here, the UE may camp on the macro CELL _3 using the existing access method.
Step 507: matching the CGI of the macro CELL CELL _3 with a neighboring CELL CGI list in CSG CELL information of historical residence of UE;
here, since the CGI of CELL _ CSG is not included in the CGI list of the neighboring CELL of CELL _ CSG, the matching fails, indicating that the macro CELL _3 is not a neighboring CELL of CELL _ CSG, and therefore, the UE does not reselect to CELL _ 3.
Step 508: the UE moves and camps on the macro CELL _ 1.
Step 509: matching the CGI of the macro CELL CELL _1 with a neighboring CELL CGI list in CSG CELL information of historical residence of UE;
here, since the CGI of the macrocell CELL _1 is stored in the neighboring CELL CGI list of the CELL _ CSG, successful matching indicates that the macrocell CELL _1 is a neighboring CELL of the CELL _ CSG.
Step 510: measuring the CELL _ CSG frequency point, and judging whether the physical CELL ID obtained by measurement is in the CSG physical CELL ID range in the CSG CELL information of the UE historical residence;
here, since the signal of CELL _ CSG becomes better during the UE moving from the coverage of macro CELL _1 to the coverage of CELL _ CSG, the UE will detect the physical CELL ID of CELL _ CSG within the CSG physical CELL ID range at f 1.
Step 511: judging whether the CELL _ CSG frequency point is the same frequency point of the CELL _ 1;
here, the CELL _ CSG frequency point is an intra-frequency point of the CELL _ 1.
Step 512: judging whether the signal quality of the CELL _ CSG is higher than the signal quality of the CELL _ 1;
here, as the UE moves from the coverage of CELL _1 to the coverage of CELL _ CSG, the signal quality of CELL _ CSG becomes better and higher than the signal quality of CELL _1, and when the signal quality of CELL _ CSG is higher than the signal quality of CELL _1, CELL reselection to CELL _ CSG may be initiated.
Step 513: and the UE selects the CELL _ CSG as a resident CELL.
Fig. 6 is a schematic structural diagram of a device for CSG cell reselection according to an embodiment of the present invention, and as shown in fig. 6, the device for CSG cell reselection according to the embodiment of the present invention includes: a matching module 61 and a measuring module 62; wherein,
the matching module 61 is configured to match CGI information of a macro cell where the UE resides with a neighboring CGI list in CSG cell information where the UE resides historically, and trigger the measurement module 62 when matching is successful;
the measurement module 62 is configured to measure a CSG cell frequency point corresponding to the successfully matched neighboring CGI list, perform measurement and evaluation on the physical cell when determining that the measured physical cell ID is within a CSG physical cell ID range in the CSG cell information that the UE historically resides in, and select the physical cell as a residing cell when determining that the physical cell meets measurement and evaluation conditions.
Further, the apparatus further comprises: an obtaining module 63, configured to obtain relevant information of a CSG cell when the UE resides in the CSG cell, store the relevant information of the CSG cell in CSG cell information that the UE resides in history, and write the relevant information of the CSG cell into a nonvolatile memory at the same time, so that the relevant information of the CSG cell is not lost after the UE is powered off and can be read for use after the UE is powered on next time; wherein the relevant information of the CSG cell comprises: CSG cell frequency point, CSG ID, PLMNID, CSG physical cell ID range and CGI list of neighbor cells of the CSG cell;
correspondingly, the information of the CSG cell where the UE resides historically includes: the device comprises a CSG cell frequency point, a CSG ID, a PLMNID of the CSG cell, a CSG physical cell ID range and a CGI list of a neighboring cell of the CSG cell, wherein the CSG cell frequency point and the CSG ID are resided by the device historically;
the obtaining module 63 obtains the ID range of the CSG physical cell and the CGI list of the neighboring cell of the CSG cell, which includes:
the obtaining module 63 extracts a CSG physical cell ID range in SIB4 and a common-frequency neighboring cell CGI list of the CSG cell, and extracts an inter-frequency neighboring cell CGI list of the CSG cell in SIB5, where the common-frequency neighboring cell CGI list of the CSG cell and the inter-frequency neighboring cell CGI list of the CSG cell together form a neighboring cell CGI list of the CSG cell, the neighboring cell CGI list of the CSG cell can store neighboring cell CGI information of N CSG cells at most, N is a positive integer, and a value of N can be set according to an actual situation;
wherein, the CGI information included in the neighboring cell CGI list of the CSG cell includes: cell PLMN ID and CELLID; here, the CELL ID is neighbor CELL identity information of the CSG CELL, which is added by adding a cellIdentity information element to SIB4 and SIB 5; the cellIdentity cell is only a necessary option for the CSG cell, so that the configuration of the system information SIB4 of the conventional common macro cell is not influenced, when the CSG cell is deployed, the common-frequency neighboring cell CGI information of the CSG cell is added to a common-frequency neighboring cell list in SIB4, and the pilot-frequency neighboring cell CGI information of the CSG cell is added to a pilot-frequency neighboring cell list in SIB 5; the same-frequency neighbor list structure of the SIB4 and the different-frequency neighbor list structure of the SIB5 after the cell identity information element is added include: a physcellld cell, a q-OffsetCell cell, and a cellIdentity cell.
Further, the matching module 61 matches the CGI information of the macro cell where the UE resides with the neighboring cell CGI list in the CSG cell information where the UE historically resides, and if the matching is successful, it indicates that the CGI information of the macro cell is stored in the neighboring cell CGI list that is successfully matched, which may indicate that the macro cell is a neighboring cell of the CSG cell corresponding to the neighboring cell CGI list that is successfully matched.
Further, when the measurement module 62 determines that the measured physical cell ID is within the CSG physical cell ID range in the CSG cell information where the UE resides historically, it indicates that the physical cell is a CSG cell, and measurement and evaluation on the physical cell may be started;
the measurement evaluation conditions are: the physical cell frequency point is a pilot frequency point of the macro cell, or the physical cell frequency point is a same frequency point of the macro cell, and the signal quality of the physical cell is higher than that of the macro cell.
The matching module 61, the measuring module 62 and the obtaining module 63 can be implemented by a Central Processing Unit (CPU) in a server, a Digital Signal Processor (DSP), or a Field Programmable Gate Array (FPGA).
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (8)
1. A method for Closed Subscriber Group (CSG) cell reselection, the method comprising:
the user terminal UE matches the global cell identifier CGI information of the resident macro cell with a neighboring cell CGI list in CSG cell information of historical resident UE, and when the matching is successful, the CSG cell frequency point corresponding to the successfully matched neighboring cell CGI list is measured;
and when determining that the ID of the physical cell obtained by measurement is within the ID range of the CSG physical cell in the CSG cell information of the historical residence of the UE, performing measurement evaluation on the physical cell, and when determining that the physical cell meets the measurement evaluation conditions, selecting the physical cell as the residence cell.
2. The method according to claim 1, wherein before the UE matches the CGI information of the macro cell where the UE camps on to the neighboring CGI list in the CSG cell information where the UE historically camps on, the method further comprises: and the UE resides in the CSG cell, and acquires and stores the CSG cell frequency point, the ID range of the CSG physical cell and the CGI list of the neighbor cell of the CSG cell.
3. The method according to claim 2, wherein the UE obtaining the CSG physical cell ID range and the neighboring CGI list of the CSG cell comprises:
the UE extracts a CSG physical cell ID range in a system information block type SIB4 and a co-frequency neighboring cell CGI list of the CSG cell, and extracts a pilot frequency neighboring cell CGI list of the CSG cell in an SIB5, wherein the co-frequency neighboring cell CGI list of the CSG cell and the pilot frequency neighboring cell CGI list of the CSG cell jointly form a neighboring cell CGI list of the CSG cell;
wherein, the CGI information included in the neighboring cell CGI list of the CSG cell includes: a CELL public land mobile network identity PLMN ID and a CELL identity CELL ID.
4. The method according to any one of claims 1 to 3, wherein the measurement evaluation condition is: the physical cell frequency point is a pilot frequency point of the macro cell, or the physical cell frequency point is a same frequency point of the macro cell, and the signal quality of the physical cell is higher than that of the macro cell.
5. An apparatus for CSG cell reselection, the apparatus comprising: a matching module and a measuring module; wherein,
the matching module is used for matching the CGI information of the macro cell where the UE resides with a neighboring CGI list in the CSG cell information where the UE historically resides, and triggering the measurement module when the matching is successful;
and the measuring module is used for measuring the CSG cell frequency point corresponding to the successfully matched CGI list of the neighboring cell, performing measurement evaluation on the physical cell when the physical cell ID obtained by measurement is determined to be within the CSG physical cell ID range in the CSG cell information of the historical residence of the UE, and selecting the physical cell as the residence cell when the physical cell is determined to meet the measurement evaluation conditions.
6. The apparatus of claim 5, further comprising: and the obtaining module is used for obtaining and storing the CSG cell frequency point, the CSG physical cell ID range and the CGI list of the neighboring cell of the CSG cell when the UE resides in the CSG cell.
7. The apparatus of claim 6, wherein the obtaining module obtains the CSG physical cell ID range and the CGI list of the neighboring cell of the CSG cell comprises:
the obtaining module extracts a CSG physical cell ID range in SIB4 and a common-frequency neighboring cell CGI list of the CSG cell, and extracts a different-frequency neighboring cell CGI list of the CSG cell in SIB 5; wherein,
the common-frequency neighboring cell CGI list of the CSG cell and the pilot-frequency neighboring cell CGI list of the CSG cell jointly form a neighboring cell CGI list of the CSG cell;
wherein, the CGI information included in the neighboring cell CGI list of the CSG cell includes: CELL PLMN ID and CELL ID.
8. The apparatus according to any one of claims 5 to 7, wherein the measurement evaluation condition is: the physical cell frequency point is a pilot frequency point of the macro cell, or the physical cell frequency point is a same frequency point of the macro cell, and the signal quality of the physical cell is higher than that of the macro cell.
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| PCT/CN2014/090383 WO2015117432A1 (en) | 2014-07-21 | 2014-11-05 | Method and device for reselecting closed subscriber group cell, and storage medium |
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