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User terminal and cell selection method and device thereof

A cell selection and user terminal technology, applied in the field of wireless communication, can solve problems such as affecting user experience, small number of cells, high power consumption, etc., to improve user experience, realize resource reuse, and reduce power consumption.

Active Publication Date: 2016-07-20
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0027] However, the cell storage information in the USIM card usually only saves the relevant information of several cells that the terminal has resident before shutdown, and the number of saved cells is small, usually only the relevant information of 3 cells that the terminal has resident information
Moreover, this solution can only achieve better results when the terminal is in the same geographical location when it is turned off and turned on, and it cannot bring much help to the subsequent cell selection when the geographical location changes.
[0028] However, when the applicable cell cannot be found by using the cell storage information in the USIM card, it is necessary to search for the applicable cell through the initial cell selection process, which often leads to a long time spent in cell selection, resulting in a large power consumption. affect user experience

Method used

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  • User terminal and cell selection method and device thereof
  • User terminal and cell selection method and device thereof
  • User terminal and cell selection method and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] As described below, an embodiment of the present invention provides a cell selection method.

[0077] refer to figure 1 The flow chart of the cell selection method is shown in detail below through specific steps:

[0078] S101. In response to a received cell selection request, try to find a suitable cell by using cell storage information.

[0079] After the terminal is turned on (or when it enters the coverage area from the blind area), it starts the cell selection process in response to the received cell selection request. Wherein, the cell selection request is usually delivered by the non-access stratum.

[0080] As mentioned above, there may be cell storage information in the USIM card, and the cell storage information can usually record information about one or more cells in the form of a list. For each cell recorded, it can include the carrier frequency information of the cell Or optional cell parameters, etc. If there is stored cell information in the USIM car...

Embodiment 2

[0114] As described below, an embodiment of the present invention provides a cell selection device.

[0115] refer to image 3 The structural block diagram of the cell selection device shown:

[0116] The cell selection device includes: a frequency point storage unit 304, a first network selection unit 301, a second network selection unit 302, a third network selection unit 303 and a cell selection unit 305; wherein the main functions of each unit are as follows:

[0117] A frequency point storage unit 304, configured to pre-store central frequency point information;

[0118] The first network selection unit 301 is configured to respond to the received cell selection request and try to use cell storage information to find a suitable cell;

[0119] The second network selection unit 302 is configured to try to find a suitable cell by using the center frequency point information when the first network selection unit 301 does not find a suitable cell by using the cell storage in...

Embodiment 3

[0135] As described below, an embodiment of the present invention provides a user terminal.

[0136] The user terminal includes an access stratum and a non-access stratum. After the terminal is turned on, usually the non-access layer can send a cell selection request to the access layer to start the cell selection process.

[0137] The difference from the prior art is that the user terminal also includes a cell selection device as provided in the embodiment of the present invention. Therefore, the user terminal can try to find a suitable cell by using the center frequency point information when no suitable cell is found by using the cell storage information. The center frequency point information is about each center frequency point found by the terminal in the previous use process information, so that the situation of using the initial cell selection process to search for applicable cells can be reduced, the efficiency of cell selection is improved, user experience is also i...

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PUM

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Abstract

The invention discloses a user terminal and a cell selection method and device thereof. The method comprises the following steps: attempting to use cell storage information to search a proper cell in response to a received cell selection request; attempting to use central frequency point information to search the proper cell under the condition that the proper cell is unsearched through the adoption of the cell storage information, wherein the center frequency point information is information of each center frequency point found by the terminal in the former use process; attempting to search the proper cell through the initial cell selection process under the condition that the proper cell is unsearched through the adoption of the center frequency point information; after searching the proper cell, selecting the proper cell. Under the condition that the proper cell is unsearched through the adoption of the cell storage information, the center frequency point information is used for searching the proper cell in attempting, thereby reducing the condition of using the initial cell selection process to search the proper cell; the efficiency of cell selection is improved, the user experience is improved, and the power consumption is reduced.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a user terminal and a cell selection method and device thereof. [0002] Terminology Explanation [0003] UE——UserEquipment——user terminal, referred to as terminal; [0004] AS - AccessStratum - access layer; [0005] NAS - Non-AccessStratum - non-access stratum; [0006] RF——RadioFrequency——radio frequency; [0007] ARFCN——AbsoluteRadioFrequencyChannelNumber——absolute radio channel number; [0008] ValidARFCN——center frequency point, the frequency point that really exists in the real network; [0009] Suitable cell——a cell that is suitable for the cell, meets the residence conditions of the cell, and can conduct normal business; [0010] Acceptable cell——acceptable cell, which cannot carry out normal business, but can initiate an emergency call; [0011] PLMN——PublicLandMobileNetwork——Public land mobile network, a network established and operated by t...

Claims

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Application Information

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IPC IPC(8): H04W48/16
CPCY02D30/70
Inventor 宋铁城刘艳春
Owner SPREADTRUM COMM (SHANGHAI) CO LTD