CN107333306B

CN107333306B - User equipment and method for accessing CSG cell thereof

Info

Publication number: CN107333306B
Application number: CN201610284218.3A
Authority: CN
Inventors: 林雁
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2016-04-29
Filing date: 2016-04-29
Publication date: 2020-04-21
Anticipated expiration: 2036-04-29
Also published as: CN107333306A

Abstract

A user equipment and a method for accessing the same to a CSG cell, the method comprises the following steps: when confirming that the access macro base station or the cell under the control of the home base station is accessed, the access network discovery and selection function is started, and the white list held by the access network discovery and selection function is not empty, sending an access network information request comprising the current position information of the access network discovery and selection function; receiving an access network information response; the CSG cell information which has the distance from the CSG cell to the CSG cell which is less than a first distance threshold value and has access authority per se is included; according to the access network information response, and referring to the current position information of the access network, automatically searching the history information of the CSG cell visited previously in an auxiliary manner; detecting whether a CSG cell with access authority exists in an area with the distance from the current position smaller than the first distance threshold value or not according to the automatic searching result; and accessing the CSG cell when the CSG cell with the access authority exists. By adopting the scheme, the user equipment can be accessed to the CSG cell or even the CSG cell which has not been visited before.

Description

User equipment and method for accessing CSG cell thereof

Technical Field

The present invention relates to the field of communications, and in particular, to a user equipment and a method for accessing a CSG cell.

Background

The femtocell may be deployed in an Evolved Universal Terrestrial Radio access network (E-UTRAN) network and a Universal Terrestrial Radio Access Network (UTRAN) network.

A cell under the home base station may be referred to as a home base station cell or a Closed Subscriber Group (CSG) cell. The same user may belong to multiple CSGs, each CSG identified by a CSG Identity (ID). A white list is prestored in a User Equipment (UE) that provides a CSG service, where the white list records CSG IDs and Public Land Mobile Network (PLMN) IDs associated with the CSG IDs that the UE is allowed to access, and CSG cells corresponding to other CSG IDs outside the white list are usually inaccessible to the UE. The UE records history information of previously visited CSG cells.

Currently, in the process of reselecting and reporting neighbor indication, the UE supporting the CSG function automatically searches for a history message, acquires information of a CSG cell having an access right according to a search result, and finally accesses the CSG cell.

However, if the CSG cell is accessed by the method described above, the UE cannot access a neighboring CSG cell or even a neighboring CSG cell that has not been visited before.

Disclosure of Invention

The problem solved by the invention is how to realize that the user equipment can be accessed to the nearby CSG cell and even the nearby CSG cell which is not visited before.

In order to solve the above problem, an embodiment of the present invention provides a method for accessing a CSG cell, where the method includes: when the access to a cell under the jurisdiction of a macro base station or a home base station is confirmed, whether a network side starts an access network discovery and selection function is detected; when the network side is confirmed to start the access network discovery and selection function and the white list held by the network side is not empty, sending an access network information request including the current position information of the network side to equipment suitable for realizing the access network discovery and selection function through an S14 interface, so that the equipment suitable for realizing the access network discovery and selection function obtains the information of the CSG cell, the distance between the equipment and the equipment is less than a preset first distance threshold value, and the CSG cell has access authority; receiving the access network information response from the device adapted to implement the access network discovery and selection function; wherein: the access network information response comprises the information of the CSG cell which has the access authority and the distance from the access network information response to the CSG cell is less than the first distance threshold; according to the access network information response, and referring to the current position information of the access network, automatically searching the history information of the CSG cell visited previously in an auxiliary manner; detecting whether a CSG cell with access authority exists in an area with the distance from the current position smaller than the first distance threshold value or not according to the automatic searching result; and accessing the CSG cell when the CSG cell with the access authority exists in the area with the distance from the current position smaller than the first distance threshold.

Optionally, the information of the CSG cell includes: CSG ID, ID of CSG cell; wherein, the public land mobile network ID associated with the CSG ID is the currently serving public land mobile network ID.

Optionally, the access network information response further includes: public land mobile network ID.

Optionally, the access network information response further includes the current location information of the access network.

Optionally, the history information includes: a public land mobile network ID, a CSG ID, and an ID of a CSG cell.

Optionally, the history information further includes location information of the CSG cell.

Optionally, the responding according to the access network information and referring to the current location information of the access network, and assisting in automatically searching the history information of the CSG cell visited previously, includes: and only the history information of the CSG cell with the current position smaller than the second distance threshold value is automatically searched.

Optionally, the responding according to the access network information and referring to the current location information of the access network, and assisting in automatically searching the history information of the CSG cell visited previously, includes: and automatically searching only the history information of the CSG ID which is subordinate to the access network information response.

Optionally, the responding according to the access network information and referring to the current location information of the access network, and assisting in automatically searching the history information of the CSG cell visited previously, includes: and automatically searching only the historical information of the public land mobile network ID and the access network information response to which the CSG ID belongs.

Optionally, the responding according to the access network information and referring to the current location information of the access network, and assisting in automatically searching the history information of the CSG cell visited previously, includes: adding CSG cell information not in the history information.

Optionally, the method further comprises: and when the white list is empty, not sending the access network CSG information request.

Optionally, whether the network side starts the access network discovery and selection function is detected through a dynamic host configuration protocol or a domain name resolution system.

Optionally, the device adapted to implement the access network discovery and selection function generates an access network information response, including: the equipment suitable for realizing the access network discovery and selection function acquires a white list of the equipment from a home subscriber server, acquires information of the CSG cell of which the distance to the equipment is less than the first distance threshold value according to the current position information, and filters the information of the CSG cell through the white list to obtain the information of the CSG cell of which the distance to the equipment is less than the first distance threshold value and which has access authority.

Optionally, the accessing the CSG cell includes: when the CSG cell is in an idle state, the CSG cell is accessed through reselection; and when the self is in a connected state, sending a neighbor indication report to the network side to serve as a reference for configuring measurement parameters by the network side, so that the network side evaluates the measurement report and switches the self to the CSG cell.

An embodiment of the present invention provides a user equipment, where the user equipment includes: the first detection unit is suitable for detecting whether the network side starts an access network discovery and selection function when the access of a macro base station or a cell under the control of a home base station is confirmed; a sending unit, adapted to send an access network information request including current location information of the first detection unit to a device adapted to implement the access network discovery and selection function through an S14 interface when the first detection unit confirms that the network side has started the access network discovery and selection function and a white list held by the first detection unit is not empty, so that the device adapted to implement the access network discovery and selection function obtains information of a CSG cell whose distance from the device is less than a preset first distance threshold and which has an access right; a receiving unit adapted to receive the access network information response from the device adapted to implement the access network discovery and selection function; wherein: the access network information response comprises the information of the CSG cell which has the access authority and the distance from the access network information response to the CSG cell is less than the first distance threshold; the automatic searching unit is suitable for responding according to the access network information and referring to the current position information of the automatic searching unit to assist in automatically searching the history information of the CSG cell visited previously; the second detection unit is suitable for detecting whether a CSG cell with access authority exists in an area with the distance from the current position smaller than the first distance threshold value or not according to the automatic searching result; and the cell access unit is suitable for accessing the CSG cell when the CSG cell with the access authority exists in the area with the distance between the current position and the first distance threshold value, which is determined by the second detection unit.

Optionally, the access network information response further includes a public land mobile network ID.

Optionally, the automatic search unit is adapted to automatically search only history information of CSG cells whose distance from the current location of the automatic search unit is smaller than a second distance threshold.

Optionally, the automatic search unit is adapted to: and automatically searching only the history information of the CSG ID which is subordinate to the access network information response.

Optionally, the automatic search unit is adapted to: and automatically searching only the historical information of the public land mobile network ID and the access network information response to which the CSG ID belongs.

Optionally, the automatic search unit is adapted to add CSG cell information that is not within the history information.

Optionally, the sending unit is further adapted to not send the access network CSG information request when the white list is empty.

Optionally, the first detecting unit is adapted to detect whether the network side starts an access network discovery and selection function through a dynamic host configuration protocol or a domain name resolution system.

Optionally, the device adapted to implement the access network discovery and selection function is adapted to obtain a white list of itself from a home subscriber server, obtain information of a CSG cell whose distance from itself is smaller than the first distance threshold according to the current location information, and filter the information of the CSG cell through the white list to obtain information of the CSG cell whose distance from itself is smaller than the first distance threshold and which has an access right.

Optionally, the cell access unit is adapted to access the CSG cell by reselection when the cell access unit is in an idle state; and when the network side is in a connected state, sending a neighbor indication report to the network side to serve as a reference for configuring measurement parameters of the network side, so that the network side further evaluates the measurement report and switches the network side to the CSG cell.

Compared with the prior art, the technical scheme of the invention has the following advantages:

the method comprises the steps of obtaining information of CSG cells which have access authority and have distances smaller than a preset first distance threshold value from an access network through an access network information response from an access network discovery and selection function, further responding according to the access network information and referring to current position information of the access network, assisting automatic search of history information of the CSG cells visited previously, then detecting whether the CSG cells having access authority exist in an area which has the distances smaller than the first distance threshold value from the current position, and finally accessing the CSG cells.

Drawings

Fig. 1 is a flowchart illustrating a method for accessing a CSG cell according to an embodiment of the present invention;

fig. 2 is a diagram of a scenario for accessing a CSG cell according to an embodiment of the present invention;

fig. 3 is a signaling diagram illustrating a method for accessing a CSG cell according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an apparatus for accessing a CSG cell in an embodiment of the present invention.

Detailed Description

In order to solve the above problem, the embodiment of the present invention obtains the information of the CSG cell having access right and a distance from the CSG cell to the CSG cell that is smaller than the preset first distance threshold through the access network information response from the access network discovery and selection function, and then according to the access network information response, and referring to the current position information of the self, the automatic search of the history information of the CSG cell visited previously is assisted, then detecting whether a CSG cell with access authority exists in an area with the distance from the current position being less than the first distance threshold value, finally accessing the CSG cell, since the information of the CSG cell in the access network information response from the access network discovery and selection function is reliable, since the information of the CSG cell other than the history information can be acquired, the user equipment can efficiently access the neighboring CSG cell and the neighboring CSG cell that has not been visited before.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

A method for accessing a CSG cell in an embodiment of the present invention is shown below, and as shown in fig. 1, the method is described in detail in steps with reference to fig. 1 below:

step S101: and determining whether to access a macro base station or a cell under the jurisdiction of the home base station.

In a specific implementation, when it is determined to access a cell under the jurisdiction of a macro base station or a home base station, step S102 may be executed; otherwise, the flow may end.

Step S102: whether the network side starts the access network discovery and selection function is detected, and the white list held by the network side is not empty.

In a specific implementation, the fact that the white list of the UE is not empty means that the UE is a CSG member user, that is, means that the UE has the right to access the CSG cell.

It should be noted that the ANDSF is deployed in the core network, and the core network may select whether to start the ANDSF function. When the ANDSF function is turned on, the ANDSF may communicate with the UE through the S14 interface, and assist the UE in selecting an access network according to the location information reported by the UE and the user network selection preference, for example, the ANDSF may provide the UE with available access network type information (for example, whether the network type is a cellular network or a WLAN), access network ID information (for example, a cell ID and a Service Set Identification (SSID)), and whether data Service information is provided through a core network.

In specific implementation, the UE has multiple ways to detect whether the network side starts the access network discovery and selection function, for example, the UE can detect through a dynamic host configuration protocol, and also can detect whether the network side starts the access network discovery and selection function through a domain name resolution system.

When it is determined that the network side has started the access network discovery and selection function and the white list held by the network side is not empty, step S103 may be executed; otherwise, the procedure may be ended, that is, if the white list is empty, the access network CSG information request is not sent.

Step S103: sending an access network information request including its own current location information to a device adapted to implement the access network discovery and selection function over an S14 interface.

In a specific implementation, if it is determined that the network side has already started the access network discovery and selection function and the white list held by the UE itself is not empty, an access network information request including its current location information may be actively sent to a device adapted to implement the access network discovery and selection function through the S14 interface. For ANDSF, after receiving the access network information request, ANDSF may obtain a white list of the UE from a Home Subscriber Server (HSS), and further obtain CSG cell information located near the UE from an operator according to the location information of the UE carried in the access network information request, and then filter the CSG cell information using the white list, so-called filtering, that is, obtaining the CSG cell information near the UE and where the UE is a member user. It should be understood that, the vicinity mentioned here means that the distance from the user is smaller than a preset first distance threshold, and a person skilled in the art may set the first distance threshold according to actual needs, and the size of the first distance threshold does not set any limit to the scope of the present invention.

In a specific implementation, the information of the CSG cell includes: CSG ID and ID of CSG cell, wherein the default of the public land mobile network ID related to the CSG ID is the current service public land mobile network ID.

In an embodiment of the present invention, the access network information response may further include a frequency point or a public land mobile network ID, where the public land mobile network ID may be different from a currently serving public land mobile network ID, and may generally occur in a scenario supporting a shared network.

Step S104: receiving the access network information response from the device adapted to implement the access network discovery and selection function; wherein: and the access network information response comprises the information of the CSG cell which has the access authority and the distance from the CSG cell to the access network information response is less than the first distance threshold.

In specific implementation, the ANDSF may send, to the UE, CSG cell information that the distance from the UE is smaller than a preset first distance threshold and the UE is a member user, through an access network information response.

Step S105: and according to the access network information response, and by referring to the current position information of the access network, automatically searching the history information of the CSG cell visited previously in an auxiliary manner.

In a specific implementation, when receiving the access network information response, the UE may assist in automatically searching the history information of the CSG cell visited previously according to the access network information response and by referring to the current location information of the UE. In this way, since the information of the CSG cell in the access network information response from the ANDSF is relatively reliable, and the information of the CSG cell other than the history information can be obtained, it is possible to realize that the user equipment can efficiently access the neighboring CSG cell or the neighboring CSG cell that has not been visited before.

It should be noted that the access network information response may include the current location information of itself, or may not include the current location information of itself.

In a specific implementation, the UE records information of all CSG cells visited by the UE, so as to form history information. In order to distinguish different CSG cells belonging to different public land mobile network IDs, the history information includes: a public land mobile network ID, a CSG ID, and an ID of a CSG cell.

If the UE has a function, such as GPS, to be turned on at the time of recording the history information, in an embodiment of the present invention, the history information may further include location information of the CSG cell. It is to be understood that the location information may have various forms, for example, the location information may be GPS location information, or may also be fingerprints of signal strengths of neighboring cells, and the like. The form of the location information does not set any limit to the scope of the present invention.

In a specific implementation, according to different contents of the history information and the access network information response, there may be a plurality of ways to implement the response according to the access network information and refer to the current location information of the access network to assist in automatically searching the history information of the CSG cell visited previously.

For example, if the access network information response includes the current location information of the access network in addition to the CSG cell information that is smaller than the preset first distance threshold and that is a member user, when the access network information response is performed to assist in automatically searching the history information of the CSG cell that has been visited previously by referring to the current location information of the access network, only the history information of the CSG cell whose current location is smaller than the second distance threshold may be automatically searched. That is, if a certain CSG cell is too far away from the UE and the UE cannot access the CSG cell temporarily, the UE may not search the corresponding history information. Therefore, CSG cells with certain coverage areas far away from the current position of the UE can be filtered, and the accuracy of reselection or neighbor indication reporting is improved. And by filtering the historical information, the complexity of the UE searching process can be reduced, and the execution efficiency is improved. It should be noted that, a person skilled in the art may set the size of the second distance threshold according to actual needs.

It should be noted that the first and second distance thresholds are only for convenience of description and do not represent a size relationship, that is, the first distance threshold may be equal to the second distance threshold, and the first distance threshold may be greater than or less than the second distance threshold. The skilled person can set the distance according to actual needs, but no matter how the size and relative size relationship of the first and second distance thresholds are, the protection scope of the present invention is not limited, and is within the protection scope of the present invention.

For example, if the access network information response does not include a public land mobile network ID, when the history information of the CSG cell visited previously is assisted to be automatically searched according to the access network information response and by referring to the current location information of the access network, only the history information of the CSG ID belonging to the access network information response may be automatically searched.

For example, if the access network information response includes a public land mobile network ID, when the access network information response refers to the current location information of the access network and assists in automatically searching the history information of the CSG cell visited previously, only the public land mobile network ID and the history information of the CSG ID belonging to the access network information response may be automatically searched.

For example, when it is found that the access network information response includes CSG cell information that is not included in the history information, when assisting in automatically searching for history information of a CSG cell that has been visited previously by referring to the current location information of the access network information response according to the access network information response, CSG cell information that is not included in the history information may be added. Therefore, the situation that an ideal CSG cell with good channel quality and right access exists in the vicinity of the UE, but the CSG cell is not visited by the UE and the UE cannot reselect or report the neighbor indication only by the historical information can be avoided, so that the accuracy of accessing the CSG cell by the UE can be improved, and the user experience can be improved.

Step S106: and detecting whether a CSG cell with access authority exists in an area with the distance from the current position smaller than the first distance threshold value according to the automatic searching result.

In a specific implementation, when it is determined that a CSG cell having an access right exists in an area smaller than the first distance threshold from the current location, step S107 may be executed; otherwise, the flow may end.

Step S107: and accessing the CSG cell.

In particular implementations, the UE may access the CSG cell in a variety of ways. Such as: if the CSG cell is in an idle state, the CSG cell can be accessed through reselection; if the CSG cell is in a connected state, a neighbor indication report may be sent to the network side as a reference for configuring measurement parameters by the network side, and then the network side evaluates the measurement report and switches itself to the CSG cell.

In order to make the present invention better understood and implemented by those skilled in the art, the following detailed description is provided by an access scenario of a CSG cell.

As shown in fig. 2, the scenario may include: network side 21, ANDSF22, UE23, macro cell 24, CSG cell 1, CSG cell 2, and CSG cell 3, where: the ANDSF22 may communicate with the user equipment 23 via an S14 interface.

Referring to the signaling diagram of the CSG cell access method shown in fig. 3, the macro base station 31, the CSG cell 32, the UE23, and the ANDSF22 interact with each other through signaling.

The access procedure of the CSG cell is described below with reference to fig. 2 and 3:

step S31: the UE23 accesses a cell under the jurisdiction of the macro base station 31.

In a specific implementation, the UE23 may access the macro cell 24 in the cell under the jurisdiction of the macro base station 31, and after the access is completed, perform S32.

Step S32: ANDSF22 was found.

In an implementation, the UE23 may discover the ANDSF22 through DHCP or DNS, that is, determine whether the network side 21 turns on the ANDSF22 function.

Step S33: UE23 actively sends an access network information request to ANDSF 22.

In a specific implementation, after the UE23 finds the ANDSF22, it may determine whether the white list is empty, where the white list is not empty, which means that the UE23 is a CSG member user, and then if the UE23 is a CSG member user, may actively send an access network (CSG) information request to the ANDSF22 through the S14 interface, where the request includes current location information of the UE 23. If the UE23 is not a CSG member subscriber, then an access network (CSG) information request will not be initiated.

Step S34: ANDSF22 sends an access network (CSG) information response to UE 23.

In a specific implementation, the ANDSF22 may obtain a white list of the UE23 from the HSS, and then obtain CSG cell information located near the UE23 from an operator according to the UE23 location information carried in the access network information request, and further filter the CSG cell information by using the white list, that is, reserve: CSG cell information about the UE23 that is a member user of UE23 is then sent to UE23 via an access network (CSG) information response. For example, although there are CSG cell 1, CSG cell 2 and CSG cell 3 in fig. 2, the information of CSG cell 1 may be retained after filtering by ANDSF 22.

It should be noted that the CSG cell information may include a PLMN ID (optional), a frequency point (optional), a CSG ID, a physical cell ID, location information (optional), and the like where the CSG cell is located.

Step S35, the UE23 evaluates whether there is a CSG cell that is a member of itself nearby.

In particular implementations, the UE23 may optimize the automatic search based on the latest CSG cell information in the access information response and with reference to the current location information of the UE23 to detect whether there is a CSG cell in the vicinity that is a member of itself.

If it is confirmed after the evaluation that there is a CSG cell of which itself is a member in the vicinity, the UE23 may perform S36; otherwise, the flow may end.

Step S36: the UE23 accesses the CSG cell 32.

In particular implementations, if the UE23 is in an idle state, the CSG cell 32 may be accessed by reselection; if the UE23 is in the connected state, a neighbor indication report is sent to the network side as a reference for configuring measurement parameters by the network side, and the network side further evaluates the measurement report and finally switches the UE23 to the CSG cell 32.

In summary, through the access network information response from the access network discovery and selection function, information of the CSG cell having the access right and a distance from the CSG cell to the CSG cell that is smaller than the preset first distance threshold is obtained, and then according to the access network information response, by referring to the current location information of the CSG cell, automatic search is performed on history information of the CSG cell that has been visited previously, and then whether the CSG cell having the access right exists in an area having the current location that is smaller than the first distance threshold is detected, and finally the CSG cell is accessed. Since the information of the CSG cell in the access network information response from the ANDSF is relatively reliable, the information of the CSG cell other than the history information can be obtained, and thus, the user equipment can efficiently access to the nearby CSG cell or even the nearby CSG cell that has not been visited before.

In order to enable those skilled in the art to better understand and implement the present invention, a user equipment in the embodiment of the present invention is provided below, and as shown in fig. 4, the user equipment may include: a first detecting unit 41, a transmitting unit 42, a receiving unit 43, an automatic searching unit 44, a second detecting unit 45 and a cell accessing unit 46, wherein:

the first detecting unit 41 is adapted to detect whether the network side starts an access network discovery and selection function when it is determined to access a cell managed by a macro base station or a home base station;

the sending unit 42 is adapted to send, through an interface S14, an access network information request including current location information of the device adapted to implement the access network discovery and selection function to the device adapted to implement the access network discovery and selection function when the first detecting unit 41 confirms that the network side has started the access network discovery and selection function and the white list held by the device is not empty, so that the device adapted to implement the access network discovery and selection function obtains information of a CSG cell, of which the distance from the device adapted to implement the access network discovery and selection function is smaller than a preset first distance threshold and of which the device has access right;

the receiving unit 43 is adapted to receive the access network information response from the device adapted to implement the access network discovery and selection function; wherein: the access network information response comprises the information of the CSG cell which has the access authority and the distance from the access network information response to the CSG cell is less than the first distance threshold;

the automatic searching unit 44 is adapted to respond to the access network information and refer to the current location information of the self to assist in automatically searching the history information of the CSG cell visited previously;

the second detecting unit 45 is adapted to detect whether a CSG cell having an access right exists in an area smaller than the first distance threshold from the current position according to the result of the automatic search;

the cell accessing unit 46 is adapted to access the CSG cell when the second detecting unit 45 determines that the CSG cell having the access right exists in the area whose distance from the current position is smaller than the first distance threshold.

In a specific implementation, the information of the CSG cell may include: CSG ID, ID of CSG cell; wherein, the public land mobile network ID associated with the CSG ID is the currently serving public land mobile network ID.

In an embodiment of the present invention, the information of the CSG cell in the access network information response may further include a public land mobile network ID. In a specific implementation, the access network information response further includes the current location information of the access network.

In a specific implementation, the history information includes: a public land mobile network ID, a CSG ID, and an ID of a CSG cell.

In a specific implementation, the history information further includes location information of the CSG cell.

In a specific implementation, the automatic searching unit 44 is adapted to automatically search only the history information of the CSG cell whose distance from the current location of the CSG cell is smaller than the second distance threshold.

In a specific implementation, the automatic search unit 44 is adapted to: and automatically searching only the historical information of the public land mobile network ID and the access network information response to which the CSG ID belongs.

In an embodiment of the present invention, the automatic searching unit 44 is further adapted to automatically search only history information of public land mobile network IDs and CSG IDs belonging to the access network information response.

In a specific implementation, the automatic searching unit 44 is adapted to add CSG cell information that is not in the history information.

In a specific implementation, the sending unit 42 is further adapted to not send the access network CSG information request when the white list is empty.

In a specific implementation, the first detecting unit 41 is adapted to detect whether the network side starts the access network discovery and selection function through a dynamic host configuration protocol or a domain name resolution system.

In a specific implementation, the device adapted to implement the access network discovery and selection function generates an access network information response, including: the equipment suitable for realizing the access network discovery and selection function acquires a white list of the equipment from a home subscriber server, acquires information of the CSG cell of which the distance to the equipment is less than the first distance threshold value according to the current position information, and filters the information of the CSG cell through the white list to obtain the information of the CSG cell of which the distance to the equipment is less than the first distance threshold value and which has access authority.

In a specific implementation, the cell accessing unit 46 is adapted to access the CSG cell by reselection when the cell is in an idle state; and when the network side is in a connected state, sending a neighbor indication report to the network side to serve as a reference for configuring measurement parameters of the network side, so that the network side further evaluates the measurement report and switches the network side to the CSG cell.

Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer-readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, and the like.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for accessing a CSG cell, comprising:

when the access to a cell under the jurisdiction of a macro base station or a home base station is confirmed, whether a network side starts an access network discovery and selection function is detected;

when the network side is confirmed to start the access network discovery and selection function and the white list held by the network side is not empty, sending an access network information request including the current position information of the network side to equipment suitable for realizing the access network discovery and selection function through an S14 interface, so that the equipment suitable for realizing the access network discovery and selection function obtains the information of the CSG cell, the distance between the equipment and the equipment is less than a preset first distance threshold value, and the CSG cell has access authority;

receiving an access network information response from the device adapted to implement the access network discovery and selection function; wherein: the access network information response comprises the information of the CSG cell which has the access authority and the distance from the access network information response to the CSG cell is less than the first distance threshold;

according to the access network information response, and referring to the current position information of the access network, automatically searching the history information of the CSG cell visited previously in an auxiliary manner;

detecting whether a CSG cell with access authority exists in an area with the distance from the current position smaller than the first distance threshold value or not according to the automatic searching result;

when determining that a CSG cell with access authority exists in an area which is less than the first distance threshold from the current position, accessing the CSG cell;

when the access network information response comprises CSG cell information which is not included in the history information, adding CSG cell information which is not in the history information when the access network information response refers to the current position information of the access network and assists in automatically searching the history information of the CSG cell visited previously.

2. The method of accessing a CSG cell as claimed in claim 1, wherein the information of the CSG cell comprises: CSGID, ID of CSG cell;

wherein, the public land mobile network ID associated with the CSG ID is the currently serving public land mobile network ID.

3. The method of accessing a CSG cell as claimed in claim 2, wherein the access network information response further includes: public land mobile network ID.

4. The method of accessing a CSG cell as claimed in claim 2, wherein the access network information response further includes current location information of the access network.

5. The method of accessing a CSG cell as claimed in claim 1, wherein the history information comprises: public land mobile network ID, CSGID, and ID of CSG cell.

6. The method of accessing a CSG cell as claimed in claim 5, wherein the history information further includes location information of the CSG cell.

7. The method according to claim 6, wherein the responding according to the access network information and referring to the current location information of the CSG cell itself to assist in automatically searching for history information of the CSG cell visited previously comprises:

and only the history information of the CSG cell with the current position smaller than the second distance threshold value is automatically searched.

8. The method according to claim 1, wherein the responding according to the access network information and referring to the current location information of the access network, assisting in automatically searching the history information of the CSG cell visited previously comprises:

and automatically searching only the historical information of the CSGID which is subordinate to the access network information response.

9. The method according to claim 1, wherein the responding according to the access network information and referring to the current location information of the access network, assisting in automatically searching the history information of the CSG cell visited previously comprises:

and automatically searching only the historical information of the public land mobile network ID and the access network information response to which the CSG ID belongs.

10. The method of accessing a CSG cell as recited in claim 1, further comprising:

and when the white list is empty, not sending the access network information request.

11. The method of accessing a CSG cell as claimed in claim 1, wherein a dynamic host configuration protocol or a domain name resolution system is used to detect whether the network side starts an access network discovery and selection function.

12. The method of accessing a CSG cell as claimed in claim 1, wherein the device adapted to implement the access network discovery and selection function generates an access network information response comprising:

the equipment suitable for realizing the access network discovery and selection function acquires a white list of the equipment from a home subscriber server, acquires information of the CSG cell of which the distance to the equipment is less than the first distance threshold value according to the current position information, and filters the information of the CSG cell through the white list to obtain the information of the CSG cell of which the distance to the equipment is less than the first distance threshold value and which has access authority.

13. The method of accessing a CSG cell as claimed in claim 1, wherein said accessing the CSG cell comprises:

when the CSG cell is in an idle state, the CSG cell is accessed through reselection;

and when the self is in a connected state, sending a neighbor indication report to the network side to serve as a reference for configuring measurement parameters by the network side, so that the network side evaluates the measurement report and switches the self to the CSG cell.

14. A user device, comprising:

the first detection unit is suitable for detecting whether the network side starts an access network discovery and selection function when the access of a macro base station or a cell under the control of a home base station is confirmed;

a sending unit, adapted to send an access network information request including current location information of the first detection unit to a device adapted to implement the access network discovery and selection function through an S14 interface when the first detection unit confirms that the network side has started the access network discovery and selection function and a white list held by the first detection unit is not empty, so that the device adapted to implement the access network discovery and selection function obtains information of a CSG cell whose distance from the device is less than a preset first distance threshold and which has an access right;

a receiving unit adapted to receive an access network information response from the device adapted to implement the access network discovery and selection function; wherein: the access network information response comprises the information of the CSG cell which has the access authority and the distance from the access network information response to the CSG cell is less than the first distance threshold;

the automatic searching unit is suitable for responding according to the access network information and referring to the current position information of the automatic searching unit to assist in automatically searching the history information of the CSG cell visited previously;

the second detection unit is suitable for detecting whether a CSG cell with access authority exists in an area with the distance from the current position smaller than the first distance threshold value or not according to the automatic searching result;

the cell access unit is suitable for accessing the CSG cell when the CSG cell with access authority exists in the area with the distance between the current position and the first distance threshold value determined by the second detection unit;

and the adding unit is suitable for adding the CSG cell information which is not in the history information when the access network information response includes the CSG cell information which is not included in the history information and the self current position information is referred to for assisting to automatically search the history information of the CSG cell visited previously according to the access network information response.

15. The user equipment of claim 14, wherein the information of the CSG cell comprises: CSGID, ID of CSG cell; wherein, the public land mobile network ID associated with the CSGID is the currently serving public land mobile network ID.

16. The UE of claim 14, wherein the response further includes a public land mobile network ID.

17. The UE of claim 15, wherein the response further includes current location information of the UE.

18. The UE of claim 14, wherein the history information comprises: a public land mobile network ID, a CSG ID, and an ID of a CSG cell.

19. The UE of claim 18, wherein the history information further comprises location information of CSG cells.

20. The UE of claim 19, wherein the automatic searching unit is adapted to automatically search only the history information of CSG cells with a distance to the current location of the UE less than a second distance threshold.

21. The user equipment according to claim 14, wherein the automatic search unit is adapted to: and automatically searching only the historical information of the CSGID which is subordinate to the access network information response.

22. The user equipment according to claim 14, wherein the automatic search unit is adapted to: and automatically searching only the historical information of the public land mobile network ID and the access network information response to which the CSG ID belongs.

23. The UE of claim 14, wherein the sending unit is further adapted to not send the request for access network information when the white list is empty.

24. The ue according to claim 14, wherein the first detecting unit is adapted to detect whether the network side turns on an access network discovery and selection function through a dynamic host configuration protocol or a domain name resolution system.

25. The ue according to claim 14, wherein the device adapted to implement the access network discovery and selection function is adapted to obtain a white list of itself from a home subscriber server, obtain information of CSG cells whose distance from itself is smaller than the first distance threshold according to the current location information, and filter the information of CSG cells through the white list to obtain information of CSG cells whose distance from itself is smaller than the first distance threshold and which have access rights.

26. The UE of claim 14, wherein the cell accessing unit is adapted to access the CSG cell through reselection when the UE is in an idle state; and when the network side is in a connected state, sending a neighbor indication report to the network side to serve as a reference for configuring measurement parameters of the network side, so that the network side further evaluates the measurement report and switches the network side to the CSG cell.