CN105282797B - Method and device for closed subscriber group cell reselection - Google Patents

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

Method and device for closed subscriber group cell reselection

technical field

The present invention relates to the technical field of Long Term Evolution (LTE, Long Term Evolution) mobile communication, in particular to a method and device for reselecting a Closed Subscriber Group (CSG, Closed Subscriber Group) cell.

Background technique

CSG is a concept introduced for home base stations. People who use home base stations are divided into some user groups. Users who are eligible to use home base stations to provide services are considered members of the user group. The user group composed of these members is called closed user group.

CSG cells are generally used as outdoor macro cells, that is, as a supplement to non-CSG cells, to enhance indoor coverage and reduce the load of outdoor macro cells to provide higher wireless service quality. Therefore, CSG cells are generally deployed in existing macro cells. However, the users who sign up to use the Femtocell within the coverage of the same macro cell also change dynamically. There are unsubscribed users and new users. All CSG cells within the coverage of the macro cell are added to the neighbor cell relationship of the macro cell, and the system changes in time, which will lead to a continuous and huge workload.

Since the macro cell does not have the neighbor cell relationship information of the CSG cell in the coverage area, the user terminal (UE, UserEquipment) cannot perform reselection using the neighbor cell information configuration according to the 3rd Generation Partnership Project (3GPP, The 3rd Generation Partnership Project) protocol The method automatically reselects to the CSG cell.

Contents of the invention

In view of this, the embodiments of the present invention expect to provide a method and device for reselecting a CSG cell, which can improve the success rate of automatic reselection of a UE to a CSG cell and prolong the standby time of the UE in an idle state.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

An embodiment of the present invention provides a method for reselecting a CSG cell, the method comprising:

The UE matches the CGI (Cell Global Identification) information of the macro cell where it resides with the neighbor cell CGI list in the CSG cell information where the UE has historically camped. The CSG cell frequencies corresponding to the list are measured;

When it is determined that the measured physical cell identity code (ID, IDentity) is within the range of the CSG physical cell ID in the CSG cell information where the UE has historically resided, perform measurement and evaluation on the physical cell, and determine that the physical cell meets When measuring and evaluating conditions, the physical cell is selected as the camping cell.

In the above solution, before the UE matches the CGI information of the macro cell where the UE is camped on with the neighbor cell CGI list in the CSG cell information where the UE has previously camped, the method further includes: the UE camps on the CSG cell, obtains and Save the frequency point of the CSG cell, the ID range of the CSG physical cell and the CGI list of the neighboring cells of the CSG cell.

In the above solution, the UE obtaining the CSG physical cell ID range and the CSG cell neighbor CGI list includes:

The UE extracts the CSG physical cell ID range in System Information Block Type (SIB, System Information BlockType) 4 and the same-frequency neighbor cell CGI list of the CSG cell, and extracts the inter-frequency neighbor cell CGI of the CSG cell in SIB5 A list, the CGI list of the same-frequency neighbors of the CSG cell and the CGI list of the different-frequency neighbors of the CSG cell together form the CGI list of the neighbors of the CSG cell;

Wherein, the CGI information contained in the neighboring cell CGI list of the CSG cell includes: a public land mobile network identity (PLMN, Public Land Mobile Network) ID of a cell and a cell ID of a cell.

In the above solution, the measurement evaluation condition is: the frequency point of the physical cell is a different frequency point of the macro cell, or the frequency point of the physical cell is the same frequency point of the macro cell, and the frequency point of the physical cell is The signal quality is higher than that of the macro cell.

The embodiment of the present invention also provides a CSG cell reselection device, the device includes: a matching module, a measurement module; wherein,

The matching module is configured to match the CGI information of the macro cell where the UE resides with the neighbor cell CGI list in the CSG cell information where the UE has historically resided, and trigger the measurement module when the matching is successful;

The measurement module is configured to measure the frequency point of the CSG cell corresponding to the successfully matched neighboring cell CGI list, and determine that when the measured physical cell ID is within the range of the CSG physical cell ID in the CSG cell information where the UE has historically resided, Performing measurement evaluation on the physical cell, and selecting the physical cell as a camping cell when it is determined that the physical cell meets the measurement evaluation condition.

In the above solution, the device further includes: an acquisition module, configured to acquire and save the frequency point of the CSG cell, the ID range of the CSG physical cell, and the CGI list of neighboring cells of the CSG cell when the UE camps on the CSG cell .

In the above solution, the acquisition module acquiring the CSG physical cell ID range and the CSG cell neighbor CGI list includes:

The obtaining module extracts the CSG physical cell ID range in SIB4 and the same-frequency neighbor CGI list of the CSG cell, and extracts the different-frequency neighbor CGI list of the CSG cell in SIB5; wherein, the same-frequency neighbor CGI list of the CSG cell The frequency neighbor CGI list and the inter-frequency neighbor CGI list of the CSG cell together form the neighbor CGI list of the CSG cell;

Wherein, the CGI information contained in the neighboring cell CGI list of the CSG cell includes: cell PLMN ID and CELLID.

In the above solution, the measurement evaluation condition is: the frequency point of the physical cell is a different frequency point of the macro cell, or the frequency point of the physical cell is the same frequency point of the macro cell, and the frequency point of the physical cell is The signal quality is higher than that of the macro cell.

In the CSG cell reselection method and device provided by the embodiments of the present invention, the UE matches the CGI of the macro cell where it resides with the CGI list of neighboring cells in the CSG cell information where the UE has historically resided. Measure the frequency of the CSG cell corresponding to the successful neighbor cell CGI list; when it is determined that the measured physical cell ID is within the range of the CSG physical cell ID in the CSG cell information where the UE has historically resided, perform measurement and evaluation on the physical cell, And when it is determined that the physical cell meets the measurement evaluation condition, select the physical cell as the cell to reside on. In this way, it can ensure that the UE automatically reselects to the CSG cell every time it approaches the CSG cell without the user's perception, improves the success rate of the UE's automatic reselection to the CSG cell, reduces UE power consumption and increases UE idle state standby time.

Description of drawings

FIG. 1 is a schematic flowchart of a method for CSG cell reselection according to Embodiment 1 of the present invention;

FIG. 2 is a schematic flowchart of a method for reselecting a CSG cell according to Embodiment 2 of the present invention;

FIG. 3 is a schematic diagram of a topological relationship between a macro cell and a CSG cell according to an embodiment of the present invention;

FIG. 4 is a schematic flowchart of a method for reselecting a CSG cell according to Embodiment 3 of the present invention;

FIG. 5 is a schematic flowchart of a method for reselecting a CSG cell according to Embodiment 4 of the present invention;

FIG. 6 is a schematic diagram of the composition and structure of an apparatus for CSG cell reselection according to an embodiment of the present invention.

Detailed ways

Figure 1 is a schematic flow chart of a method for reselecting a CSG cell according to Embodiment 1 of the present invention. As shown in Figure 1 , the method for reselecting a CSG cell in this embodiment includes:

Step 101: The UE matches the CGI information of the macro cell where it is camped on with the neighboring cell CGI list in the CSG cell information where the UE has previously camped. take measurements;

Before this step, the method further includes: the UE camps on a CSG cell, obtains relevant information of the CSG cell, and saves the relevant information of the CSG cell to the CSG cell information (CsgHistoryInfo) where the UE has historically resided, and simultaneously writes In this way, the relevant information of the above-mentioned CSG cell will not be lost after the UE is powered off, and can still be read and used after the next boot;

Wherein, the relevant information of the CSG cell includes: CSG cell frequency point (CsgEarfcn), CSG ID, PLMN ID of the CSG cell, CSG physical cell ID range (CsgPhysCellIdRange) and a neighbor cell CGI list of the CSG cell;

Correspondingly, the CSG cell information where the UE has historically camped includes: the CSG cell frequency point, CSGID, CSG cell PLMNID, CSG physical cell ID range, and CSG cell neighbor CGI list of the CSG cell where the UE has historically camped;

Here, when the UE camps on a CSG cell for the first time, the user is required to camp on an allowed CSG cell through manual CSG selection; or, the UE is set to the automatic CSG selection mode, and the CSG cell has the strongest coverage after the UE is powered on. During the initial camping process at startup, the CSG cell with the strongest coverage will be selected for camping;

The acquisition by the UE of the CSG physical cell ID range and the neighbor cell CGI list of the CSG cell includes:

The UE extracts the CSG physical cell ID range in SIB4 and the same-frequency neighboring cell CGI list of the CSG cell, and extracts the different-frequency neighboring cell CGI list of the CSG cell in SIB5; wherein, the same-frequency neighboring cell CGI list of the CSG cell The CGI list of frequency neighbors and the CGI list of inter-frequency neighbors of the CSG cell together form the CGI list of neighbors of the CSG cell, and the CGI list of neighbors of the CSG cell can store up to N neighbors of the CSG cell CGI information, N is a positive integer, and the value of N can be set according to the actual situation;

Here, the CGI information contained in the neighboring cell CGI list of the CSG cell includes: cell PLMN ID and CELLID.

Further, before the UE acquires the CSG physical cell ID range and the CSG cell neighbor CGI list, the method further includes: adding cell identity (cellIdentity) information elements in SIB4 and SIB5 respectively, and setting the cell identity The information element is only mandatory for CSG cells. In this way, it does not affect the configuration of the system information SIB4 of the existing common macro cells. When deploying CSG cells, add the CGI information of the same-frequency adjacent cells of the CSG cell to the same-frequency adjacent cells in SIB4. List, add the CGI information of the inter-frequency adjacent cell of the CSG cell to the inter-frequency adjacent cell list in SIB5; add the same-frequency adjacent cell list structure of SIB4 and the inter-frequency adjacent cell list structure of SIB5 after adding the cell identity information element All include: physCellId information element, q-OffsetCell information element and cellIdentity information element;

Here, it should be noted that the above operation before the UE selects and accesses the macro cell only needs to be performed during the initial use of the CSG cell reselection method of the present invention, that is, only the UE has saved the relevant information of the CSG cell That is, it can be directly used in subsequent CSG cell reselection by the UE.

Further, the UE matches the CGI information of the macro cell with the neighboring cell CGI list in the CSG cell information where the UE has historically resided, and if the matching is successful, it means that the macro cell exists in the successfully matched neighboring cell CGI list CGI information, it can also indicate that the macro cell is a neighboring cell of the CSG cell corresponding to the successfully matched neighboring cell CGI list;

The measuring the frequency point of the CSG cell corresponding to the CGI list of the neighboring cell that is successfully matched includes: detecting the physical cell ID on the frequency point of the CSG cell.

Step 102: When it is determined that the measured physical cell ID is within the range of the CSG physical cell ID in the CSG cell information where the UE has historically resided, perform measurement and evaluation on the physical cell, and when it is determined that the physical cell meets the measurement evaluation conditions , selecting the physical cell as the resident cell;

Here, when the UE detects that there is a physical cell ID on the frequency point of the CSG cell, and determines that the measured physical cell ID is within the range of the CSG physical cell ID in the CSG cell information where the UE has historically camped, it indicates that the physical cell For a CSG cell, the measurement and evaluation of this physical cell can be enabled;

The measurement evaluation condition is: the frequency point of the physical cell is a different frequency point of the macro cell, or the frequency point of the physical cell is the same frequency point of the macro cell, and the signal quality of the physical cell is higher than The signal quality of the macro cell.

Fig. 2 is a schematic flow chart of the CSG cell reselection method in Embodiment 2 of the present invention. In the embodiment of the present invention, the UE has already camped in the CSG cell, and has saved the relevant information of the CSG cell to the CSG cell where the UE has historically camped. In the information, the UE is in an idle state, and as the UE moves, it will select a macro cell with better signal, as shown in Figure 2, the CSG cell reselection method in this embodiment includes:

Step 201: UE selects and accesses a macro cell;

Here, the UE may select and access the macro cell by using an existing access method.

Step 202: Match the CGI information of the macro cell with the neighbor cell CGI list in the CSG cell information where the UE has historically resided, and judge whether the matching is successful. If the matching is successful, perform step 203; when the matching fails, perform step 202: 207;

Here, the CGI information of the macro cell is matched with the neighboring cell CGI list in the CSG cell information where the UE has historically resided, and if the matching is successful, it means that the CGI of the macro cell is stored in the successfully matched neighboring cell CGI list information, that is, it can indicate that the macro cell is a neighboring cell of the CSG cell corresponding to the successfully matched neighboring cell CGI list.

Step 203: Measure the frequency point of the CSG cell corresponding to the CGI list of the neighboring cell that is successfully matched, and judge whether the measured physical cell ID is within the range of the CSG physical cell ID in the CSG cell information where the UE has historically camped. Within the physical cell ID range, execute step 204; otherwise, execute step 207;

Here, when it is detected that the physical cell ID on the frequency point of the CSG cell corresponding to the CGI list of the neighboring cell that matches successfully is within the range of the CSG physical cell ID, it indicates that the physical cell is a CSG cell, and the measurement of the physical cell can be started Evaluate.

Step 204: Determine whether the physical cell is the same frequency point of the macro cell, if yes, perform step 205; if not, perform step 206.

Step 205: Determine whether the signal quality of the physical cell is higher than the signal quality of the macro cell, if yes, perform step 206; otherwise, perform step 207.

Step 206: UE selects the physical cell as the cell to camp on;

Here, specific operations for the UE to camp on the physical cell include reading cell system information, matching CSG ID, and the like.

Step 207: End this processing flow;

Here, the UE has not been reselected to the CSG cell, and can perform the same-frequency/different-frequency measurement evaluation and reselection process of the macro cell.

Figure 3 is a schematic diagram of the topological relationship between a macro cell and a CSG cell according to an embodiment of the present invention. As shown in Figure 3, it includes a CSG cell (CELL_CSG) and three macro cells (CELL_1, CELL_2, CELL_3), and the information of each cell is shown in the following table :

Table 1

In Figure 3, the three large hexagons represent the wireless coverage of CELL_1, CELL_2, and CELL_3, and the small hexagon represents the wireless coverage of CELL_CSG, where CELL_CSG and CELL_1 are of the same frequency, CELL_CSG and CELL_2 are of different frequencies, and the wireless coverage of CELL_CSG is Part of the coverage area overlaps with CELL_1, and the other part overlaps with CELL_2. Therefore, when configuring CELL_CSG cell neighbor cell information, the same-frequency neighbor cell list of SIB4 includes cellIdentity1 in the CGI of the same-frequency neighbor cell CELL_1, and the inter-frequency neighbor cell list of SIB5 Include the cellIdentity2 in the CGI of the same-frequency neighbor cell CELL_2, and then, when the UE camps on the CELL_CSG, the CSG cell information that the UE has historically camped on includes: the CELL_CSG frequency point, PLMNID, CSG ID, and CSG physical cell ID range, and the CGI list of the neighboring cells of the CELL_CSG; wherein, the CGI list of the neighboring cells of the CELL_CSG includes the CGI information of the macro cells CELL_1 and CELL_2.

Fig. 4 is a schematic flow diagram of a method for reselecting a CSG cell in Embodiment 3 of the present invention. In combination with Fig. 3 , in the embodiment of the present invention, the UE has already camped in CELL_CSG and saved the relevant information of the CELL_CSG to the CSG where the UE has previously camped. In the cell information, the UE is in an idle state, moves to CELL_1, CELL_3, CELL_2 in sequence, and moves to CELL_CSG again, as shown in Figure 4, the method for CSG cell reselection in this embodiment includes:

Step 401: UE moves and camps on macro cell CELL_1;

Here, the UE may use an existing access method to camp on the macro cell CELL_1.

Step 402: Match the CGI information of the macro cell CELL_1 with the neighbor cell CGI list in the CSG cell information where the UE has historically camped;

Here, since the CGI of the macro cell CELL_1 is stored in the neighboring cell CGI list of CELL_CSG, the matching is successful, indicating that CELL_1 is a neighboring cell of the CELL_CSG.

Step 403: Measure the CELL_CSG frequency point, and determine whether the measured physical cell ID is within the range of the CSG physical cell ID in the CSG cell information where the UE has historically camped;

Here, since the measured cell ID is the cell ID of the CELL_CSG whose signal quality gradually becomes weaker, the cell ID of the CELL_CSG is within the range of the CSG physical cell ID.

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 the same-frequency 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 to CELL_1 in the CELL_CSG, the signal quality of the CELL_1 is higher than that of the CELL_CSG, therefore, the UE will not reselect to the CELL_CSG.

Step 406: The UE moves and camps on the macro cell CELL_3;

Here, the UE may use an existing access method to camp on the macro cell CELL_3.

Step 407: Match the CGI of the macro cell CELL_3 with the neighbor cell CGI list in the CSG cell information where the UE has historically camped;

Here, since the CGI list of the neighboring cell of CELL_CSG does not contain the CGI of CELL_3, the matching fails, indicating that the macro cell CELL_3 is not a neighboring cell of CELL_CSG, and therefore, the UE will not reselect to the CELL_3.

Step 408: The UE moves and camps on the macro cell CELL_2;

Here, the UE may use an existing access method to camp on the macro cell CELL_2.

Step 409: Match the CGI of CELL_2 with the neighbor cell CGI list in the CSG cell information where the UE has historically camped;

Here, since the CGI of the macro cell CELL_2 is stored in the neighboring cell CGI list of CELL_CSG, the matching is successful, indicating that the macro cell CELL_2 is a neighboring cell of the CELL_CSG.

Step 410: Measure the CELL_CSG frequency point, and judge whether the measured physical cell ID is within the range of the CSG physical cell ID in the CSG cell information where the UE has historically camped;

Here, since the UE is moving from the coverage of the macro cell CELL_2 to the coverage of CELL_CSG, the signal of CELL_CSG gradually becomes better, and the UE will eventually detect the physical cell ID of CELL_CSG on f1, and the physical cell ID of CELL_CSG Within the range of the CSG physical cell ID in the CSG cell information where the UE has historically camped.

Step 411: judging whether the CELL_CSG is the same-frequency frequency point of the CELL_2;

Here, the CELL_CSG frequency point is a different frequency point of the CELL_2.

Step 412: UE selects the CELL_CSG as the cell to camp on.

FIG. 5 is a schematic flow diagram of a method for reselecting a CSG cell according to Embodiment 4 of the present invention. With reference to FIG. 3 , in this embodiment of the present invention, the UE has already camped in a CSG cell, and has saved the relevant information of the CSG cell to the UE history camping In the remaining CSG cell information, the UE is in an idle state, moves to CELL_2, CELL_3, CELL_1 in sequence, and moves to CELL_CSG again, as shown in Figure 5, the CSG cell reselection method in this embodiment includes:

Step 501: UE moves and camps on macro cell CELL_2;

Here, the UE may use an existing access method to camp on the macro cell CELL_2.

Step 502: Match the CGI of the macro cell CELL_2 with the neighbor cell CGI list in the CSG cell information where the UE has historically camped;

Here, since the CGI of the macro cell CELL_2 is stored in the neighboring cell CGI list of CELL_CSG, the matching is successful, indicating that CELL_2 is the neighboring cell of the CELL_CSG.

Step 503: Perform measurement on the CELL_CSG frequency point, and determine whether the measured physical cell ID is within the range of the CSG physical cell ID in the CSG cell information where the UE has historically camped;

Here, since the measured physical cell ID of the CELL_CSG whose signal quality gradually becomes weaker, the physical cell ID of the CELL_CSG is within the range of the CSG physical cell ID.

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 a different frequency point of the CELL_2.

Step 505: UE selects the CELL_CSG as the cell to camp on;

Here, as the UE moves away from the CELL_CSG, when the CELL_CSG cannot be measured on the CELL_CSG frequency point, it will not reselect to the CELL_CSG.

Step 506: The UE moves and camps on the macro cell CELL_3;

Here, the UE may use an existing access method to camp on the macro cell CELL_3.

Step 507: Match the CGI of the macro cell CELL_3 with the neighbor cell CGI list in the CSG cell information where the UE has historically camped;

Here, since the CGI list of the neighboring cell of the CELL_CSG does not contain the CGI of the CELL_3, the matching fails, indicating that the macro cell CELL_3 is not a neighboring cell of the CELL_CSG, and therefore, the UE will not reselect to the CELL_3.

Step 508: The UE moves and camps on the macro cell CELL_1.

Step 509: Match the CGI of the macro cell CELL_1 with the neighbor cell CGI list in the CSG cell information where the UE has historically camped;

Here, since the CGI of the macro cell CELL_1 is stored in the neighboring cell CGI list of the CELL_CSG, the matching is successful, indicating that the macro cell CELL_1 is a neighboring cell of the CELL_CSG.

Step 510: Measure the CELL_CSG frequency point, and determine whether the measured physical cell ID is within the range of the CSG physical cell ID in the CSG cell information where the UE has historically camped;

Here, since the UE moves from the coverage of the macro cell CELL_1 to the coverage of CELL_CSG, the signal of CELL_CSG becomes better, and the UE will eventually detect the physical cell ID of CELL_CSG on f1, and the physical cell ID of CELL_CSG is in Within the range of the CSG physical cell ID.

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 the same-frequency frequency point of the CELL_1.

Step 512: Determine 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 the CELL_CSG is getting better and better, and will eventually be higher than the signal quality of the CELL_1. When the signal quality of the CELL_CSG is higher than the When the signal quality of CELL_1 is above mentioned, cell reselection to CELL_CSG can be initiated.

Step 513: UE selects the CELL_CSG as the cell to camp on.

FIG. 6 is a schematic diagram of the structure of a device for CSG cell reselection in an embodiment of the present invention. As shown in FIG. 6 , the composition of a device for CSG cell reselection in an embodiment of the present invention includes: a matching module 61 and a measurement module 62; wherein,

The matching module 61 is configured to match the CGI information of the macro cell where the UE resides with the neighbor cell CGI list in the CSG cell information where the UE has historically resided, and trigger the measurement module 62 when the matching is successful;

The measurement module 62 is configured to measure the frequency point of the CSG cell corresponding to the successfully matched neighboring cell CGI list, and determine when the measured physical cell ID is within the range of the CSG physical cell ID in the CSG cell information where the UE has historically resided , performing measurement evaluation on the physical cell, and selecting the physical cell as a camping cell when it is determined that the physical cell meets the measurement evaluation condition.

Further, the device further includes: an obtaining module 63, configured to obtain relevant information of the CSG cell when the UE camps on the CSG cell, and save the relevant information of the CSG cell to the information of the CSG cell where the UE has historically camped At the same time, the relevant information of the CSG cell is written into the non-volatile memory, so that the above-mentioned CSG-related information will not be lost after the shutdown, and can still be read and used after the next startup; wherein, the relevant information of the CSG cell Information includes: CSG cell frequency point, CSG ID, PLMNID, CSG physical cell ID range and CSG cell neighbor CGI list;

Correspondingly, the CSG cell information where the UE has historically camped includes: the CSG cell frequency point, CSG ID, CSG cell PLMNID, CSG physical cell ID range, and CSG cell neighbor CGI list of the CSG cell where the device has historically camped;

The acquiring module 63 acquiring the CSG physical cell ID range and the CSG cell neighbor CGI list includes:

The acquisition module 63 extracts the CSG physical cell ID range in SIB4 and the CGI list of the same-frequency adjacent cells of the CSG cell, and extracts the CGI list of the different-frequency adjacent cells of the CSG cell in SIB5, and the CGI list of the same-frequency adjacent cells of the CSG cell. The neighbor CGI list and the inter-frequency neighbor CGI list of the CSG cell together form the neighbor CGI list of the CSG cell, and the CSG neighbor CGI list can store up to N neighbor CGIs of the CSG cell Information, N is a positive integer, and the value of N can be set according to the actual situation;

Wherein, the CGI information included in the neighbor cell CGI list of the CSG cell includes: cell PLMN ID and CELLID; here, the cell ID is the neighbor of the CSG cell added by adding the cellIdentity information element in SIB4 and SIB5 Area identity information; the cellIdentity information element is only mandatory for CSG cells, so that it does not affect the configuration of the system information SIB4 of the existing common macro cells, and when deploying CSG cells, increase the CGI information of the same frequency adjacent cells of CSG cells To the same-frequency neighbor list in SIB4, add the different-frequency neighbor CGI information of the CSG cell to the different-frequency neighbor list in SIB5; add the same-frequency neighbor list structure of SIB4 and SIB5 after adding the cell identity information element The structure of the inter-frequency neighboring cell list includes: physCellId information element, q-OffsetCell information element and cellIdentity information element.

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 has historically camped, and if the matching is successful, it indicates that there are With the CGI information of the macro cell, it can be indicated that the macro cell is a neighboring cell of the CSG cell corresponding to the successfully matched neighboring cell CGI list.

Further, when the measurement module 62 determines that the measured physical cell ID is within the range of the CSG physical cell ID in the CSG cell information where the UE has historically resided, it indicates that the physical cell is a CSG cell, and the physical cell ID can be enabled for the physical cell. measurement evaluation;

The measurement evaluation condition is: the frequency point of the physical cell is a different frequency point of the macro cell, or the frequency point of the physical cell is the same frequency point of the macro cell, and the signal quality of the physical cell is higher than The signal quality of the macro cell.

Above-mentioned matching module 61, measurement module 62 and acquisition module 63 all can be by central processing unit (CPU, Central Processing Unit) in the server, or digital signal processor (DSP, Digital Signal Processor), or Field Programmable Gate Array ( FPGA, Field Programmable Gate Array) implementation.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (8)

1. A method for closed subscriber group CSG cell reselection, characterized in that the method comprises: The user terminal UE matches the global cell identity code CGI information of the macro cell where it is camped on with the neighbor cell CGI list in the CSG cell information where the UE has historically camped. Cell frequency point for measurement; When it is determined that the measured physical cell identity code ID is within the range of the CSG physical cell ID in the CSG cell information where the UE has historically resided, perform measurement and evaluation on the physical cell, and when it is determined that the physical cell meets the measurement evaluation conditions , selecting the physical cell as the camping cell. 2. The method according to claim 1, wherein before the UE matches the CGI information of the macro cell where the UE resides with the neighbor cell CGI list in the CSG cell information where the UE has previously camped, the method further It includes: the UE camps on the CSG cell, acquires and saves the frequency point of the CSG cell, the ID range of the CSG physical cell, and the CGI list of the neighboring cells of the CSG cell. 3. The method according to claim 2, wherein the acquiring the CSG physical cell ID range and the neighbor cell CGI list of the CSG cell by the UE comprises: The UE extracts the CSG physical cell ID range in the system information block type SIB4 and the CGI list of the same-frequency neighboring cells of the CSG cell, and extracts the CGI list of the inter-frequency neighboring cells of the CSG cell in SIB5, and the CGI list of the CSG cell The same-frequency neighboring cell CGI list and the different-frequency neighboring cell CGI list of the CSG cell jointly form the neighboring cell CGI list of the CSG cell; Wherein, the CGI information contained 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 frequency point of the physical cell is a different frequency point of the macro cell, or the frequency point of the physical cell is The same frequency point of the macro cell, and the signal quality of the physical cell is higher than the signal quality of the macro cell. 5. A device for CSG cell reselection, characterized in that the device comprises: a matching module and a measurement module; wherein, The matching module is configured to match the CGI information of the macro cell where the UE resides with the neighbor cell CGI list in the CSG cell information where the UE has historically resided, and trigger the measurement module when the matching is successful; The measurement module is configured to measure the frequency point of the CSG cell corresponding to the successfully matched neighboring cell CGI list, and determine that when the measured physical cell ID is within the range of the CSG physical cell ID in the CSG cell information where the UE has historically resided, Performing measurement evaluation on the physical cell, and selecting the physical cell as a camping cell when it is determined that the physical cell meets the measurement evaluation condition. 6. The device according to claim 5, further comprising: an acquiring module, configured to acquire and save the CSG cell frequency point and the CSG physical cell ID range when the UE camps on the CSG cell and a neighbor cell CGI list of the CSG cell. 7. The device according to claim 6, wherein the acquisition module acquiring the CSG physical cell ID range and the CSG cell neighbor CGI list comprises: The acquisition module extracts the CSG physical cell ID range in SIB4 and the same-frequency neighbor cell CGI list of the CSG cell, and extracts the different-frequency neighbor cell CGI list of the CSG cell in SIB5; wherein, The same-frequency neighbor CGI list of the CSG cell and the different-frequency neighbor CGI list of the CSG cell together form the neighbor CGI list of the CSG cell; Wherein, the CGI information contained in the neighboring cell CGI list of the CSG cell includes: cell PLMN ID and CELL ID. 8. The device according to any one of claims 5 to 7, wherein the measurement evaluation condition is: the frequency point of the physical cell is a different frequency point of the macro cell, or the frequency point of the physical cell is The same frequency point of the macro cell, and the signal quality of the physical cell is higher than the signal quality of the macro cell.