WO2012013164A1

WO2012013164A1 - Method for cell selection and terminal embodying cell selection

Info

Publication number: WO2012013164A1
Application number: PCT/CN2011/079577
Authority: WO
Inventors: 谢安江
Original assignee: Xie Anjiang
Priority date: 2010-07-29
Filing date: 2011-09-13
Publication date: 2012-02-02
Also published as: CN102340795A

Abstract

Provided in the present invention is a method for cell selection. The method comprises: setting in a terminal cell a selection criterion on the basis of an initial access service request and a cell selection criterion on the basis of a paging service request; when a terminal is performing a cell selection, working on the basis of the selection criterion set in the terminal on the basis of the initial access service request, selecting a cell meeting the criterion as the cell providing access service, and storing a piece of cell information of the cell selected to provide access service; working on the basis of the selection criterion set in the terminal on the basis of the paging service request, selecting a cell meeting the criterion as the cell providing paging service, and monitoring a paging channel or a paging indicator channel of the cell selected to provide paging service. Relative to the method, also provided in the present invention is a terminal embodying cell selection. The terminal comprises: a storage unit, a selection unit, a monitoring unit, an input unit, and an access request unit.

Description

Cell selection method and terminal for realizing cell selection

Technical field

The present invention relates to the field of mobile communication technologies, and in particular, to a cell selection method and a terminal for implementing cell selection.

Background technique

Currently, mobile communication has become very popular. In order to enable a user to implement mobile communication using his terminal, it is necessary to perform cell selection after the terminal is powered on, thereby enabling the mobile terminal to camp on the selected cell to implement mobile communication. Of course, in actual applications, cell reselection is also required due to reasons such as terminal mobility. At this time, the terminal also needs to perform cell selection, so that the terminal can camp in the newly selected cell to implement mobile communication.

In the prior art, the terminal selects a cell that meets the requirement requirement as a camping cell according to the set cell selection condition, and after selecting the camped cell, the terminal monitors the paging channel and/or the paging indicator channel of the camped cell, when the terminal initiates When the access request is made, an access request is initiated on the random access channel of the camped cell.

With the continuous development of mobile communication technologies, the number of mobile communication users and the amount of traffic are also increasing, which requires a mobile communication network to provide greater communication capacity. In order to improve the communication capacity of the mobile communication network, the micro area and/or the pico cell and/or the femto cell are generally covered in the hot spot area, which forms a multi-layer network coverage structure. In addition, in order to improve indoor coverage quality and provide greater communication capacity, general indoor coverage is also covered by microcells and/or picocells and/or femtocells. The so-called pico or femto cell is still essentially a kind of micro cell, but its coverage radius is smaller, and the base station has lower transmission power. It is mainly used to solve indoor or outdoor small area hotspots such as commercial centers, conference centers, and homes. Communication problem. A multi-layered mobile communication network can provide greater communication capacity, but adopting the cell selection method in the prior art while implementing multi-layer coverage increases the complexity of the operation of the mobile communication network, especially with the micro-cell in the network. And/or the number of pico cells and/or femto cells increases, the paging signaling overhead will also become larger and larger, and the increase of paging signaling overhead will increase channel interference and occupy network resources of other services, so that the communication capacity of the network reduce.

Summary of the invention

In view of this, an object of the present invention is to provide a cell selection method and a terminal for implementing cell selection, to reduce paging signaling overhead in a multi-layer covered mobile communication network, and to reduce the paging signaling overhead of the terminal. Underneath, the paging for the terminal can still be monitored.

To achieve the above object, the present invention provides the following technical solutions:

A cell selection method, the method comprising:

Setting a cell selection condition based on an initial access service requirement in the terminal, where the request includes the cell system information related to the initial access service in the cell system information sent by the cell base station; and setting the paging based in the terminal The cell selection condition required by the service includes a requirement for the cell system information related to the paging service in the cell system information sent by the cell base station;

When the above terminal performs cell selection,

Selecting, according to the cell selection condition based on the initial access service requirement set in the foregoing terminal, a cell that meets the foregoing condition requirement is to provide an access serving cell, and save cell information of the selected access service cell; and/or, according to The cell selection condition based on the paging service requirement set in the foregoing terminal selects a cell that meets the above requirement to provide a paging serving cell, and monitors a paging channel or a paging indicator channel of the selected paging serving cell.

The method also includes:

After the terminal selects to provide an access service cell and provides a paging service cell,

The terminal periodically monitors and/or triggers the terminal to listen to the broadcast channel of the selected bearer cell information of the selected access service cell, and when the cell information of the selected access service cell is monitored, the The terminal updates the saved cell information of the selected access service cell; and/or the terminal periodically monitors and/or triggers the terminal to listen to the broadcast channel of the selected bearer cell information of the paging service cell. When monitoring the cell information of the selected paging serving cell, the terminal updates the saved cell information of the selected paging serving cell; and/or,

The terminal periodically monitors and/or triggers the event to monitor, by the event, the signal level and/or signal quality of the currently selected serving serving cell and/or the currently selected paging serving cell and/or neighboring cell, and Determining, according to the monitoring result, whether the terminal needs to reselect to provide an access service cell, and if yes, triggering the terminal to select a cell selection condition that meets the foregoing condition according to a cell selection condition based on an initial access service requirement set in the terminal. The cell is provided with an access serving cell, and saves the cell information of the selected access service cell, otherwise, the terminal keeps the currently selected access service cell unchanged; and/or whether reselection is required to provide the paging service The cell, if yes, triggers the terminal to select a cell that meets the foregoing requirement according to a cell selection condition set according to a paging service requirement set in the terminal to provide a paging serving cell, and monitor the selected paging serving cell. The paging channel or paging indicator channel, otherwise, the terminal keeps the currently selected paging service cell unchanged.

The method further includes:

When the terminal initiates an access request, the terminal first reads the cell information of the currently selected access service cell saved in the terminal; after the terminal reads the cell information, the terminal indicates the cell information. Initiating an access request on the random access channel; or,

When the terminal initiates an access request, the terminal first reads the cell information of the currently selected access service cell saved in the terminal; after the terminal reads the cell information, the terminal indicates the cell information. Listening on the broadcast channel carrying the cell information, obtaining cell information providing the access service cell at the current time; and obtaining, by the terminal, the cell information of the access service cell at the current time, providing the access service cell at the current time An access request is initiated on the random access channel indicated by the cell information.

The method further includes:

After the terminal initiates an access request on the random access channel that provides the access service cell, the terminal selects the access service cell to accept the access request initiated by the terminal on the random access channel of the cell. Providing access services for the terminal.

A terminal for implementing cell selection, the terminal comprising:

a storage unit, configured to store cell information of the access service cell selected by the selecting unit and cell information of the paging service cell selected by the selecting unit;

a selecting unit, configured to select one of the monitored cells according to the initial access service requirement according to the cell selection condition based on the initial access service requirement set in the terminal and the cell selection condition based on the paging service requirement The cell of the cell selection condition provides a paging serving cell for providing the access serving cell and selecting a cell that meets the cell selection condition based on the paging service requirement from the monitored cell;

a monitoring unit, configured to monitor, by the storage unit, a paging channel or a paging indicator channel of a cell that provides a cell information description of a paging serving cell, when a paging for the terminal is monitored on the paging channel, Sending a message to the access request unit in response to the paging;

An input unit, configured to input an instruction for notifying the access request unit to initiate an active call;

The access requesting unit is configured to: when receiving an instruction of the input unit to initiate an active call or receiving a message of the listening unit that responds to the paging, initiate the access to the cell that is provided by the storage unit and provides the cell information of the access service cell request.

It can be seen from the above that, in the present invention, the terminal selects one of the monitored cells according to the cell selection condition based on the initial access service requirement set in the terminal and the cell selection condition based on the paging service requirement. The cell based on the cell selection condition of the initial access service requirement is to provide an access service cell and select a cell that meets the cell selection condition based on the paging service requirement from the monitored cell to provide a paging serving cell, in the cell selection process. The cell providing the access service and the cell providing the paging service selected by the terminal may be two different cells, which enables the terminal to select a cell with a defective paging service or even no paging service at all. Entering the serving cell, and selecting another cell to provide the paging serving cell, and listening to the paging channel or paging indicator channel of the selected paging serving cell, which makes the terminal defective or even fundamental even if one paging service is selected If the cell that does not provide the paging service provides the access service cell, the pin can still be monitored. The paging terminal. Based on the above technical features of the present invention, in a case where a macro cell provides a paging service in a multi-layer covered mobile communication network, the micro cell and/or the pico cell and/or the femto cell in the macro cell coverage area may be closed. a paging service, the terminal still being able to select a micro cell or a pico cell or a femto cell from the micro cell and/or the pico cell and/or the femto cell to provide an access serving cell, and select the macro cell to provide Paging the serving cell and listening to the paging channel or paging indicator channel of the selected paging serving cell, which enables the terminal to provide access even in selecting a micro cell or a pico cell or a femto cell that does not provide paging service at all. In the case of entering the serving cell, paging for the terminal can still be monitored. Obviously, the paging service that closes the micro cell and/or the pico cell and/or the femto cell in the coverage area of the macro cell may reduce paging signaling overhead, and the technical solution provided by the present invention enables the terminal to be In the case where the paging signaling overhead is reduced, paging for the terminal can still be monitored.

DRAWINGS

FIG. 1 is a schematic diagram of a terminal for implementing cell selection according to an embodiment of the present invention.

detailed description

Embodiments of the present invention provide a cell selection method and a terminal that implements cell selection.

The embodiments of the present invention are described in detail below.

A preferred embodiment of the invention includes the following steps:

When the terminal performs cell selection, selecting, according to the cell selection condition based on the initial access service requirement set in the terminal, the cell that meets the foregoing requirement is to provide an access serving cell, and save the selected access service cell. Cell information; selecting, according to the cell selection condition based on the paging service requirement set in the terminal, a cell that meets the foregoing condition requirement to provide a paging serving cell, and listening for a paging channel or paging of the selected paging serving cell Indicate the channel.

The terminal periodically monitors and/or triggers the terminal to listen to the broadcast channel of the selected bearer cell information of the selected access service cell, and when the cell information of the selected access service cell is monitored, the The terminal updates the saved cell information of the selected access service cell;

The terminal periodically monitors and/or triggers the terminal to listen to the broadcast channel of the selected bearer cell information of the paging serving cell, and when the cell information of the selected paging serving cell is changed, The terminal updates the saved cell information of the selected paging service cell;

In the above steps, the cell selection condition based on the initial access service requirement is set in the terminal, and the cell selection condition based on the initial access service requirement set in the terminal is now described as follows:

1. A cell selection condition based on an initial access service requirement set in a terminal, which includes a request for cell system information related to an initial access service in a cell system information transmitted by a cell base station, and a signal level to the cell and/or Or the requirement of the signal quality; the cell selection condition based on the initial access service requirement set in the terminal does not include the requirement of only the cell system information related to the paging service in the cell system information transmitted by the cell base station. The cell system information related only to the paging service includes information such as whether paging service and paging channel configuration are provided.

2. The cell selection condition based on the initial access service requirement set in the terminal may include: requesting, in the cell system information sent by the base station that is selected to provide the access service cell, that the cell accepts the terminal in the The indication information of the access request is initiated on the cell random access channel.

3. The cell selection condition based on the initial access service requirement set in the terminal may include requesting that the cell refuses to accept the terminal in the cell system information sent by the base station that is selected to provide the access service cell. The cell initiates an access request indication message on the random access channel.

To match the description of item 2 or 3 above, it also includes requirements:

In the mobile communication system, the cell system information sent by the at least one cell base station includes indication information indicating that the cell accepts the terminal to initiate an access request on the cell random access channel; and/or, in the mobile communication system And adding, to the cell system information sent by the at least one cell base station, indication information indicating that the cell refuses to accept the terminal to initiate an access request on the random access channel of the cell.

In a specific implementation, a field is added or redefined in the cell system information, where the bearer indicates that the cell accepts the indication information that the terminal initiates an access request on the random access channel of the cell, or prompts the cell to refuse to accept the terminal. Instructing information of an access request is initiated on the random access channel of the cell.

In the above steps, the cell selection condition based on the paging service requirement is set in the terminal, and the cell selection condition based on the paging service requirement set in the terminal is now described as follows:

1. A cell selection condition based on a paging service requirement set in a terminal, which includes a request for cell system information related to a paging service in a cell system information transmitted by a cell base station, and a signal level and/or signal to the cell. The quality requirement; the cell selection condition based on the paging service requirement set in the terminal may or may not include the requirement of the cell system information related only to the initial access service in the cell system information sent by the cell base station. The cell system information related only to the initial access service includes whether to provide information such as an initial access service and a random access channel configuration.

2. The cell selection condition based on the paging service requirement set in the terminal may include that the cell system information sent by the base station that is selected to provide the paging service cell is prompted to provide the cell to provide the paging channel. The indication information of the service of the terminal is called.

3. The cell selection condition based on the paging service requirement set in the terminal may include requesting that the cell is not prompted to be provided on the paging channel in the cell system information sent by the base station that selects the paging serving cell. An indication of paging the service of the terminal.

To match the description of item 2 or 3 above, it also includes requirements:

In the mobile communication system, the cell system information transmitted by the at least one cell base station includes indication information indicating that the cell provides the terminal with the service for paging the terminal on the paging channel; and/or, in the mobile communication system In the cell system information sent by the at least one cell base station, the indication information indicating that the cell refuses to provide the terminal with the service for paging the terminal on the paging channel is added.

In a specific implementation, a field is added or redefined in the cell system information, and is used to carry indication information indicating that the cell provides the terminal with a service for paging the terminal on the paging channel or prompts the cell to reject the The terminal provides indication information for paging the service of the terminal on the paging channel.

A preferred embodiment of the present invention further includes:

The cell selected by the terminal to provide an access service may reject the terminal to select a cell serving the paging service.

The cell selected by the terminal to provide access to the serving cell may also accept that the terminal selects it as a paging serving cell.

In a specific implementation, the network side explicitly knows whether the cell system information sent by the base station of one cell meets the cell selection condition based on the paging service requirement set in the terminal, that is, the location-based search set in the terminal The request for cell selection in the cell selection condition required by the call service is related to the cell system information related to the paging service in the cell system information transmitted by the cell base station, which is disclosed to the network side. The cell system information sent by the cell base station may be configured according to whether the cell provides the paging service to the terminal. When a cell provides the paging service to the terminal, the cell system information sent by the cell base station is configured to be in the terminal. The cell selection condition based on the paging service requirement set in the media system information related to the paging service in the cell system information sent by the cell base station; when a cell refuses to provide the paging service to the terminal, Configuring the cell system information sent by the base station of the cell to be in a cell selection condition that is not in accordance with the paging service requirement set in the terminal, and related to the cell system information related to the paging service in the cell system information sent by the cell base station Claim. The network side also explicitly knows whether the cell system information sent by the base station of one cell meets the cell selection condition based on the initial access service requirement set in the terminal, that is, the initial access based on the terminal is set. The requirement of the cell selection condition related to the service and the cell system information related to the initial access service in the cell system information transmitted by the cell base station is disclosed to the network side. When a cell allows the terminal to initiate an access request on the cell random access channel, the cell system information sent by the cell base station is configured to meet the cell selection condition based on the initial access service requirement set in the terminal. The request relates to the cell system information related to the initial access service in the cell system information sent by the cell base station; when a cell rejects the terminal to initiate an access request on the cell random access channel, the cell base station is configured to send The cell system information is a requirement that the cell selection information related to the initial access service in the cell system information transmitted by the cell base station is not met in the cell selection condition based on the initial access service requirement set in the terminal. Configuring the cell system information sent by one cell base station to meet the cell system information related to the initial access service in the cell system information sent by the cell base station in the cell selection condition based on the initial access service requirement set in the terminal And configuring the cell system information sent by the cell base station to be related to the paging service related to the cell system information sent by the cell base station in the cell selection condition that is not in accordance with the paging service requirement set in the terminal Requirements for community system information. In this way, when the terminal selects the cell to provide an access service cell, the cell rejects the terminal to select the cell to provide the paging service.

Certainly, the cell system information sent by one cell base station may be configured to be related to the initial access service in the cell system information that is sent to the cell base station in the cell selection condition that is determined according to the initial access service requirement set in the terminal. The requirement of the cell system information; and configuring the cell system information sent by the cell base station to be in the cell system information related to the paging service requirement set in the terminal, and the cell system information sent to the cell base station The request for community system information related to the service. In this way, when the terminal selects the cell to provide an access service cell, the cell accepts that the terminal selects the cell as a paging service.

A preferred embodiment of the present invention further includes:

When the terminal is in the CELL_PCH state or the URA_PCH state, the serving paging cell is selected as the downlink transmission serving cell.

A preferred embodiment of the present invention further includes:

When the terminal transitions from the CELL_PCH state or the URA_PCH state to the CELL_FACH state, the serving cell is transmitted with the selected access service cell as a signal.

A preferred embodiment of the present invention further includes:

Establishing a paging service association list on the network side, the list including a cell that refuses to provide a service for paging the terminal on the paging channel, and each of the lists in the list refuses to provide a cell that pages the service of the terminal on the paging channel Associated with at least one cell providing a service for paging the terminal on a paging channel, and the latter is a neighboring cell of the former; when the terminal interacts with the network side on a channel currently selected to provide an access serving cell, and When the network side determines, according to the cell system information configuration, that the currently selected provided access service cell of the terminal refuses to provide the service for paging the terminal on the paging channel, the network side infers that the terminal currently provides the paging service cell. Is a cell in a cell associated with the currently selected provided access service cell and providing a service for paging the terminal on the paging channel, registered in the paging service association list; further, the network side infers when the terminal When transferring to the CELL_PCH state or the URA_PCH state, the downlink transmission serving cell is provided on the paging channel with the provision of the currently selected provided access service cell. A cell serving cell of the terminal.

A preferred embodiment of the present invention further includes:

When the terminal selected to provide the paging service cell change causes a CELL cell update or URA update, and the terminal newly selects to provide the paging service cell to allow the terminal to initiate on the random access channel because of CELL cell update or URA update. When accessing, the terminal interacts with the network side on the newly selected channel providing the paging service cell to complete the CELL cell update or URA update process. Here, the terminal newly provides the paging service cell to allow the terminal to initiate access on the random access channel because of the CELL cell update or the URA update, and does not represent that the terminal newly provides the paging service cell is the said The currently selected access service cell selected by the terminal;

When the terminal selected to provide the paging service cell change causes a CELL cell update or URA update, and the terminal newly selects to provide the paging service cell to reject the terminal, the CELL cell update or URA update is initiated on the random access channel. When accessing, the terminal interacts with the network side on the channel currently selected to provide the access service cell, and completes the CELL cell update or URA update process.

The CELL cell update or URA update process may be implemented in different manners. Another preferred embodiment for completing the CELL cell update or URA update process is given below. The preferred embodiment includes:

When the terminal selected to provide the paging service cell change causes the CELL cell update or the URA update, the terminal interacts with the network side on the channel currently selected to provide the access service cell, and completes the CELL cell update or URA update process.

A preferred embodiment of the present invention further includes:

When the cell system information transmitted by the base station of one cell does not meet the cell selection condition based on the paging service requirement set in the terminal, the radio network controller connected to the cell base station does not send the paging to the cell base station. Paging signaling of the terminal in idle mode; the radio network controller connected to the cell base station does not send paging signal of the terminal in the CELL_PCH state to the cell base station; wireless connection with the cell base station The network controller does not send paging signal to the cell base station that is paging the terminal in the URA_PCH state.

In a specific implementation, the network side explicitly knows whether the cell system information sent by the base station of one cell meets the cell selection condition based on the paging service requirement set in the terminal, that is, the location-based search set in the terminal The request for cell selection in the cell selection condition required by the call service is related to the cell system information related to the paging service in the cell system information transmitted by the cell base station, which is disclosed to the network side. The cell system information sent by the cell base station may be configured according to whether the cell provides the paging service to the terminal. When a cell provides the paging service to the terminal, the cell system information sent by the cell base station is configured to be in the terminal. The cell selection condition based on the paging service requirement set in the media system information related to the paging service in the cell system information sent by the cell base station; when a cell refuses to provide the paging service to the terminal, Configuring the cell system information sent by the base station of the cell to be in a cell selection condition that is not in accordance with the paging service requirement set in the terminal, and related to the cell system information related to the paging service in the cell system information sent by the cell base station Claim.

When a cell refuses to provide paging service to the terminal, the radio network controller connected to the cell base station may not send paging signaling of the terminal in the idle mode to the cell base station; and the cell base station The connected radio network controller may not send the paging signaling of the terminal in the CELL_PCH state to the cell base station; the radio network controller connected to the cell base station may not send the paging to the cell base station in the URA_PCH state. Paging signaling of the terminal.

A preferred embodiment of the present invention further includes:

When the cell system information transmitted by the base station of one cell does not meet the cell selection condition based on the paging service requirement set in the terminal, the mobile switching center does not send the paging to the radio network controller connected to the cell base station. Paging signaling of the terminal in idle mode; the mobile switching center does not send paging paging of the terminal in a CELL_PCH state to a radio network controller connected to the cell base station; the mobile switching center does not The radio network controller connected to the cell base station transmits paging information of the terminal that is in the URA_PCH state.

When a cell refuses to provide paging service to the terminal, the mobile switching center may not send paging paging of the terminal in idle mode to the radio network controller connected to the cell base station; the mobile switching center may Not transmitting paging paging of the terminal in a CELL_PCH state to a radio network controller connected to the cell base station; the mobile switching center may not send a paging in a URA_PCH state to a radio network controller connected to the cell base station Paging signaling of the terminal.

A preferred embodiment of the present invention further includes:

When the cell system information transmitted by the base station of a cell does not meet the cell selection condition based on the paging service requirement set in the terminal, the cell base station does not send the paging signaling of the terminal on the paging channel. .

When a cell refuses to provide paging service to the terminal, the cell base station does not send paging paging for paging the terminal on the paging channel.

It should be noted:

1. Select, according to the cell selection condition based on the initial access service requirement set in the foregoing terminal, a cell that meets the foregoing condition requirement to provide an access serving cell, and save cell information of the selected access service cell.

In a specific implementation, the cell information of the selected access service cell is saved, and the cell information of the selected access service cell is selectively saved. Certainly, according to the cell selection condition based on the paging service requirement set in the foregoing terminal, selecting a cell that meets the foregoing condition requirement is to provide a paging serving cell, and when saving the cell information of the selected paging serving cell, It is selective to save the cell information of the selected paging service cell.

2. The terminal periodically monitors and/or triggers the event to monitor the signal level and/or signal quality of the currently selected serving serving cell and/or the currently selected paging serving cell and/or neighboring cell. And determining, according to the monitoring result, whether the re-selection needs to provide an access service cell, and if yes, triggering, by the terminal, selecting, according to the cell selection condition based on the initial access service requirement set in the terminal, that the foregoing condition is met. The required cell is to provide an access service cell, and saves the cell information of the selected access service cell, otherwise, the terminal keeps the currently selected access service cell unchanged; and/or, whether it needs to be re-selected to provide the search Calling the serving cell, if yes, triggering the terminal to select, according to the cell selection condition based on the paging service requirement set in the terminal, a cell that meets the foregoing condition requirement to provide a paging serving cell, and monitor the selected provisioning paging The paging channel or paging indicator channel of the serving cell, otherwise, the terminal keeps the currently selected paging serving cell unchanged.

The terminal periodically monitors and/or triggers the event to monitor the signal level and/or signal quality of the currently selected serving serving cell and/or the currently selected paging serving cell and/or neighboring cell. The method relates to monitoring the signal level and/or the signal quality of the neighboring cell. Preferably, the terminal only monitors the signal level and/or signal quality of the neighboring cell currently selected to provide the access service cell. Of course, monitoring the signal level and/or signal quality of the neighboring cell, there are other implementations, for example, the terminal can monitor the signal level and/or signal quality of the neighboring cell currently selected to provide the access cell; The signal level and/or signal quality of the neighboring cell currently selected to provide the paging serving cell is monitored.

When the terminal needs to reselect to provide an access service cell, the terminal selects a suitable cell from the current neighboring cell to provide an access service cell; when the terminal needs to reselect to provide a paging service cell, the terminal The terminal is a cell that provides a paging service by selecting a suitable cell from the current neighboring cell. The method for determining the current neighboring cell is as follows. The preferred implementation manner is that the neighboring cell that is currently selected to provide the access service cell is the current neighboring cell. Of course, there is another implementation manner. For example, the terminal considers the neighbor cell currently providing the access service cell and the neighbor cell currently providing the paging service cell as the current neighbor cell.

The terminal initiates an access request, and the terminal may initiate an access request, or the terminal may initiate an access request by responding to the paging.

4. According to the situation of the terminal, the terminal selects the cell differently. In one case, the terminal performs the power-on operation and triggers the terminal to perform cell selection. In another case, when the terminal needs to perform cell reselection, the terminal triggers. The terminal performs cell selection.

5. When a cell refuses to provide a paging service to the terminal, the cell may be the currently selected cell of the terminal, or may not be the currently selected cell of the terminal. In other words, a cell refusing to provide paging service to the terminal means that the cell refuses to provide paging service to the terminal regardless of whether the cell is the currently selected cell of the terminal.

6. In this document, providing a paging service to the terminal specifically points to the terminal providing a service for paging the terminal on a paging channel.

7. In this paper, the initial access specifically refers to access on a random access channel.

The terminal for implementing cell selection according to the embodiment of the present invention is described below with reference to the accompanying drawings. Referring to FIG. 1, the terminal includes:

The storage unit 101 is configured to store cell information of the access service cell selected by the selecting unit and cell information of the paging service cell selected by the selecting unit;

The selecting unit 102 is configured to select one of the monitored cells according to the initial access service requirement according to the cell selection condition based on the initial access service requirement and the cell selection condition based on the paging service requirement set in the terminal. The cell of the cell selection condition provides a paging serving cell for providing an access serving cell and selecting a cell that meets the cell selection condition based on the paging service requirement from the monitored cell;

The monitoring unit 103 is configured to monitor, by the storage unit, a paging channel or a paging indicator channel of the cell that provides the cell information description of the paging serving cell, when the paging channel for the terminal is monitored on the paging channel. Sending a message to the access request unit in response to the paging;

The input unit 104 is configured to input an instruction for notifying the access request unit to initiate an active call;

The access requesting unit 105 is configured to: when receiving an instruction of the input unit to initiate an active call or receiving a message of the intercepting unit responding to the paging, send the cell to the storage unit to provide the cell information description of the access service cell Into the request.

In order to facilitate the understanding of the present invention, an embodiment of the present invention further provides a system for implementing cell selection, where the system includes:

The terminal is configured to read the cell system information sent by the network side device, and select a cell that meets the foregoing condition according to the set cell selection condition based on the initial access service requirement, to provide an access service cell, and according to the set Selecting, according to the cell selection condition of the paging service requirement, a cell that meets the above requirements to provide a paging serving cell;

a network side device, configured to send cell system information, where the cell system information that is sent includes: prompting the cell to provide the terminal with indication information for paging the service of the terminal on the paging channel, or prompting the cell to reject the location The terminal provides indication information for paging the service of the terminal on the paging channel.

The terminal includes:

The network side device includes:

a base station, configured to send cell system information, where the cell system information that is sent includes: prompting the cell to provide the terminal with indication information for paging the service of the terminal on the paging channel, or prompting the cell to reject the terminal Providing indication information for paging the service of the terminal on the paging channel, and providing access and/or paging service to the terminal.

In a specific implementation, the cell selection condition based on the paging service requirement set in the terminal includes: the cell system information that is sent by the base station that requires the selected cell to prompt the cell to provide the terminal with paging on the paging channel. The indication information of the service of the terminal. The terminal according to the cell selection condition based on the initial access service requirement set in the terminal, the cell selection condition based on the paging service requirement, and the cell system information of the candidate cell, and the signal level and/or signal quality of the candidate cell. , respectively, providing an access service cell and providing a paging service cell.

For convenience of description, the terminal that performs cell selection according to the prior art is hereinafter referred to as a single-area selection terminal. In fact, the system for implementing cell selection according to the embodiment of the present invention may further include a single-region selection terminal, and the cell that provides both the access service and the paging service in the system may provide a camping service for the single-area selection terminal.

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. It should be noted that those skilled in the art can also make it without departing from the principles of the present invention. Several modifications and refinements are also considered to be within the scope of the present invention.

Claims

A cell selection method, the method comprising:

Setting a cell selection condition based on an initial access service requirement in the terminal, where the request includes the cell system information related to the initial access service in the cell system information sent by the cell base station; and setting the paging based in the terminal The cell selection condition required by the service includes a requirement for the cell system information related to the paging service in the cell system information sent by the cell base station;

When the above terminal performs cell selection,

Selecting, according to the cell selection condition based on the initial access service requirement set in the foregoing terminal, a cell that meets the foregoing condition requirement is to provide an access serving cell, and save cell information of the selected access service cell; and/or, according to The cell selection condition based on the paging service requirement set in the foregoing terminal selects a cell that meets the above requirement to provide a paging serving cell, and monitors a paging channel or a paging indicator channel of the selected paging serving cell.
The cell selection method according to claim 1, wherein the method further comprises:

After the terminal selects to provide an access service cell and provides a paging service cell,

The terminal periodically monitors and/or triggers the terminal to listen to the broadcast channel of the selected bearer cell information of the selected access service cell, and when the cell information of the selected access service cell is monitored, the The terminal updates the saved cell information of the selected access service cell; and/or the terminal periodically monitors and/or triggers the terminal to listen to the broadcast channel of the selected bearer cell information of the paging service cell. When monitoring the cell information of the selected paging serving cell, the terminal updates the saved cell information of the selected paging serving cell; and/or,

The terminal periodically monitors and/or triggers the event to monitor, by the event, the signal level and/or signal quality of the currently selected serving serving cell and/or the currently selected paging serving cell and/or neighboring cell, and Determining, according to the monitoring result, whether the terminal needs to reselect to provide an access service cell, and if yes, triggering the terminal to select a cell selection condition that meets the foregoing condition according to a cell selection condition based on an initial access service requirement set in the terminal. The cell is provided with an access serving cell, and saves the cell information of the selected access service cell, otherwise, the terminal keeps the currently selected access service cell unchanged; and/or whether reselection is required to provide the paging service The cell, if yes, triggers the terminal to select a cell that meets the foregoing requirement according to a cell selection condition set according to a paging service requirement set in the terminal to provide a paging serving cell, and monitor the selected paging serving cell. The paging channel or paging indicator channel, otherwise, the terminal keeps the currently selected paging service cell unchanged.
The cell selection method according to claim 1, wherein the method further comprises:

When the terminal initiates an access request, the terminal first reads the cell information of the currently selected access service cell saved in the terminal; after the terminal reads the cell information, the terminal indicates the cell information. Initiating an access request on the random access channel; or,

When the terminal initiates an access request, the terminal first reads the cell information of the currently selected access service cell saved in the terminal; after the terminal reads the cell information, the terminal indicates the cell information. Listening on the broadcast channel carrying the cell information, obtaining cell information providing the access service cell at the current time; and obtaining, by the terminal, the cell information of the access service cell at the current time, providing the access service cell at the current time An access request is initiated on the random access channel indicated by the cell information.
The cell selection method according to claim 2, wherein the method further comprises:

When the terminal initiates an access request, the terminal first reads the cell information of the currently selected access service cell saved in the terminal; after the terminal reads the cell information, the terminal indicates the cell information. Initiating an access request on the random access channel; or,

When the terminal initiates an access request, the terminal first reads the cell information of the currently selected access service cell saved in the terminal; after the terminal reads the cell information, the terminal indicates the cell information. Listening on the broadcast channel carrying the cell information, obtaining cell information providing the access service cell at the current time; and obtaining, by the terminal, the cell information of the access service cell at the current time, providing the access service cell at the current time An access request is initiated on the random access channel indicated by the cell information.
The cell selection method according to claim 3 or 4, characterized in that:

After the terminal initiates an access request on the random access channel that provides the access service cell, the terminal selects the access service cell to accept the access request initiated by the terminal on the random access channel of the cell. Providing access services for the terminal.
A cell selection method according to claim 1, 2, 3 or 4, characterized in that:

The terminal selected to provide an access service cell rejects the terminal to select to provide a paging serving cell.
A cell selection method according to claim 1, 2, 3 or 4, characterized in that:

When the terminal is in the CELL_PCH state or the URA_PCH state, the serving paging cell is selected as the downlink transmission serving cell.
A cell selection method according to claim 1, 2, 3 or 4, characterized in that:

When the cell system information transmitted by the base station of one cell does not meet the cell selection condition based on the paging service requirement set in the terminal,

A radio network controller connected to the cell base station does not send paging signal to the cell base station to page the terminal in idle mode; and/or,

The radio network controller connected to the cell base station does not send the paging signal of the terminal in the CELL_PCH state to the cell base station; and/or,

The radio network controller connected to the cell base station does not send paging signal to the cell base station that is in the URA_PCH state.
A cell selection method according to claim 1, 2, 3 or 4, characterized in that:

When the cell system information transmitted by the base station of one cell does not meet the cell selection condition based on the paging service requirement set in the terminal,

The mobile switching center does not transmit paging signaling of the terminal in idle mode to a radio network controller connected to the cell base station; and/or,

The mobile switching center does not send paging signal to the terminal in the CELL_PCH state to the radio network controller connected to the cell base station; and/or,

The mobile switching center does not transmit paging signaling for the terminal in the URA_PCH state to the radio network controller connected to the cell base station.
A terminal for implementing cell selection, where the terminal includes:

a storage unit, configured to store cell information of the access service cell selected by the selecting unit and cell information of the paging service cell selected by the selecting unit;

a selecting unit, configured to select one of the monitored cells according to the initial access service requirement according to the cell selection condition based on the initial access service requirement set in the terminal and the cell selection condition based on the paging service requirement The cell of the cell selection condition provides a paging serving cell for providing the access serving cell and selecting a cell that meets the cell selection condition based on the paging service requirement from the monitored cell;

a monitoring unit, configured to monitor, by the storage unit, a paging channel or a paging indicator channel of a cell that provides a cell information description of a paging serving cell, when a paging for the terminal is monitored on the paging channel, Sending a message to the access request unit in response to the paging;

An input unit, configured to input an instruction for notifying the access request unit to initiate an active call;

The access requesting unit is configured to: when receiving an instruction of the input unit to initiate an active call or receiving a message of the listening unit that responds to the paging, initiate the access to the cell that is provided by the storage unit and provides the cell information of the access service cell request.