WO2014000173A1

WO2014000173A1 - Method for camping in cell, terminal, and base station

Info

Publication number: WO2014000173A1
Application number: PCT/CN2012/077603
Authority: WO
Inventors: 张宏平; 曾清海
Original assignee: 华为技术有限公司
Priority date: 2012-06-27
Filing date: 2012-06-27
Publication date: 2014-01-03
Also published as: CN103650587A

Abstract

Disclosed is a method for camping in a cell, comprising: receiving a frequency band list or a cell list from a base station, cells under the frequency band list or in the cell list being cells not allowing camping; when cell selection, cell reselection or connection reestablishment is performed, searching for a cell for camping, where during cell searching, searching is prohibited from being performed on the cells under the frequency band list or in the cell list. Also disclosed are a terminal and a base station. Through the present invention, the time spent by a terminal in cell selection, cell reselection or connection reestablishment can be reduced.

Description

Cell resident method, terminal and base station

The present invention relates to the field of mobile communications, and in particular, to a cell camping method, a terminal, and a base station. Background technique

CA (Carrier Aggregation) is a technology proposed by LTE-A (Long Term Evolution-Advanced) in its Release-10 version to significantly improve spectrum efficiency and user throughput. The idea is that the UE (User Equipment) can use multiple CCs (Component Carriers) for uplink and downlink communication, where each component carrier corresponds to one cell, and these cells have the same or overlapping coverage areas. One of these aggregated cells is a PCell (Primary Cell), and the other is a SCell (Secondary Cell).

In the Release-11 version of LTE-A, the concept of NCT (new carrier type) carrier is introduced. The NCT carrier is mainly used for CA enhancement technology. The enhancement effect is as follows: Enhance spectrum efficiency and improve Three aspects of network support and energy conservation. In the Release-11 version, the NCT cell (the cell using the N CT carrier) cannot be configured independently to the UE, and can only be configured as a secondary cell to the UE, that is, the UE cannot camp in the NCT cell.

Currently, after the UE is powered on, the UE generally performs cell selection first, so as to camp on a certain cell, and then initiates a service, and must initiate a service in the camped cell. In addition, as the UE moves, the UE performs cell reselection to replace the camped cell. In addition, when the radio link fails between the UE and the cell, the UE performs a connection re-establishment operation. The connection re-establishment process first performs cell selection and re-establishes the connection on the selected cell. The process of cell selection or cell reselection is as follows: The UE selects a certain frequency band to search for a cell, and when searching for a cell, according to the PSS (Primary Synchronization Signal) or SSS (Secondary Synchronization Signal) sent by the cell. Performing synchronization and identification of the cell. When the UE searches for the PCI (Physical Cell Identity) of the cell, the system information of the cell is read, and the signal strength of the cell is measured, and then, according to the measurement result, whether to perform in the cell is performed. Resident.

However, since the NCT cell still sends the PSS or SSS to the UE, the UE may try to camp in the NCT cell, but because the Release-11 version specifies that the UE cannot camp in the NCT cell. Leaving, therefore, the UE's attempt to camp in the NCT cell will inevitably fail, which will increase the time it takes the UE to perform cell selection or cell reselection or connection re-establishment. Summary of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a cell camping method, a terminal, and a base station, which can enable the terminal to perform cell selection, cell reselection, or when performing cell selection, cell reselection, or connection reestablishment. The time it takes for the connection to be re-established.

In order to solve the above technical problem, the embodiment of the present invention provides a cell camping method, including: receiving a frequency band list or a cell list from a base station, where the small cell in the frequency band list or the cell list is a forbidden camping cell;

When performing cell selection, cell reselection, or connection re-establishment, the search cell camps, but when searching for a cell, it is prohibited to search for cells in the band list or in the cell list.

Correspondingly, an embodiment of the present invention further provides a cell resident method, including:

Sending a frequency band list or a cell list to the terminal, where the cell in the frequency band list or the cell list is a forbidden camping cell, to indicate that the terminal prohibits searching for the frequency band when performing cell selection, cell reselection, or connection re-establishment. A cell under the list or in the cell list.

Correspondingly, an embodiment of the present invention further discloses a terminal, including:

a receiving unit, configured to receive a frequency band list or a cell list from the base station, where the cell in the frequency band list or the cell list is a forbidden camping cell;

The search unit is configured to: when performing cell selection, cell reselection, or connection re-establishment, the search cell camps, but when searching for a cell, prohibiting searching for cells in the frequency band list or in the cell list.

Correspondingly, an embodiment of the present invention further discloses a base station, including:

a sending unit, configured to send a frequency band list or a cell list to the terminal, where the cell in the frequency band list or the cell list is a forbidden camping cell, to indicate that the terminal performs cell selection, cell reselection, or connection re-establishment, It is forbidden to search for cells in the frequency band list or in the cell list.

Embodiments of the present invention have the following beneficial effects:

In the embodiment of the present invention, the base station sends the information of the forbidden camping cell to the terminal in advance, so when the terminal performs cell selection, cell reselection, or connection re-establishment, the forbidden camping cell is not searched, thereby preventing the terminal from attempting to prohibit the camping cell. By camping, the possibility of terminal camping failure is reduced, thereby reducing the time it takes for the terminal to perform cell selection, cell reselection, or connection re-establishment. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic flowchart diagram of an embodiment of a cell camping method on a terminal side of the present invention;

2 is a schematic flowchart diagram of an embodiment of a cell camping method on a base station side of the present invention;

3 is a schematic structural diagram of an embodiment of a terminal of the present invention;

4 is a schematic structural diagram of an embodiment of a base station of the present invention. detailed description

BRIEF DESCRIPTION OF THE DRAWINGS The technical solutions in the embodiments of the present invention will be described in detail with reference to the accompanying drawings. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative work are within the scope of the present invention.

The terminals in the following refer to various types of user equipment such as mobile communication terminals, UEs, MEs (Mobile Equipments), and other devices supporting various types of wireless communication technologies. Base stations in the following include, but are not limited to, Node B, eNB (evolved Node B, evolved base station), access point.

Please refer to FIG. 1 , which is a schematic flowchart of an embodiment of a cell camping method on the terminal side of the present invention. The method flow of Figure 1 includes:

Step S11: Receive a frequency band list or a cell list from the base station, where the cell in the frequency band list or the cell list is a forbidden camping cell.

The base station transmits the information of the forbidden cell to the terminal in the manner of the frequency band list when one or some frequency bands are all provided for use by the forbidden camping cell. When a certain frequency band is provided for use by both the prohibited camping cell and the normal cell (non-banned camping cell), the base station transmits the information of the camping cell to the terminal in a cell list manner.

Further, the frequency band in the frequency band list in step S11 may be an NCT frequency band, and the NCT frequency band means that all cells in the frequency band are NCT cells. The cell in the cell list in step S11 is an NCT cell. Since the NCT cell cannot be independently configured for the terminal, it can only be configured as a secondary cell to the terminal, so An NCT cell is a cell in which a terminal is prohibited from camping.

Further, two methods for receiving a frequency band list or a cell list from a base station are introduced:

The first is that the terminal reads the SIB (System Information Block) message of the cell broadcast, where the SIB message carries the frequency band list or the cell list. Here, the base station can extend the existing SIB message to carry the uplink frequency band list or the cell list information, or the base station newly adds a SIB message specifically carrying the frequency band list or the cell list. Here, the terminal can access the network, for example, to boot the attached network, and read the SIB message broadcast by the cell.

The other is that the RRC (Radio Resource Control) connection of the terminal is received by the base station, and the RRC connection release message is received from the base station, where the RRC connection release message carries the frequency band list or the cell list. When the terminal accesses the network, for example, the terminal is powered on to perform the network attach operation, and the terminal and the base station establish an RRC connection. After the RRC connection is established, before the terminal enters the idle state, the base station sends an RRC connection release message to the terminal to release the establishment. The RRC connection may be performed by the base station to carry the frequency band list or the cell list through the RRC connection release message to achieve the purpose of transmitting the information of the forbidden camp cell to the terminal.

Step S12: When performing cell selection, cell reselection, or connection re-establishment, the search cell camps, but when searching for a cell, it is prohibited to search for cells in the frequency band list or in the cell list.

The difference between the step S12 and the existing one is that, when cell selection, cell reselection or connection reestablishment is performed, since the camped cell information is prohibited in step S11, the search is not performed in step S12. In addition, the process of searching and camping on the remaining cells is well known to those skilled in the art and will not be described herein.

In this embodiment, when the terminal selects, reselects, or re-establishes the connection, the terminal does not perform a search for the forbidden camping cell (preferably, the camping cell is prohibited to be an NCT cell), that is, does not attempt to camp in the cell that is prohibited from camping. Therefore, the possibility of terminal camping failure can be reduced, and the time taken by the terminal in performing cell selection, cell reselection, or connection re-establishment can be reduced, and the terminal can be saved.

Referring to FIG. 2, it is a schematic flowchart of an embodiment of a cell camping method on a base station side of the present invention. The method flow of Figure 2 includes:

Step S21: Obtain a frequency band list or a cell list, where the cells in the frequency band list or the cell list are prohibited to camp on the cell.

The base station may obtain a frequency band list or a cell list of a base station in the network or an adjacent base station by using OAM (Operation and Maintenance Management), etc. The frequency band list may refer to the NCT frequency band, and the cell list obtained here may refer to the NCT cell list, that is, the cell in the cell list is an NCT cell. It should be noted that if a certain frequency band is planned to be used by a prohibited camping cell during the network planning period, the above operation is performed to obtain a frequency band list; if in the network planning, a certain frequency band is planned to be both When it is forbidden to camp on the cell and used by the normal cell, the above operation is performed to obtain the cell list.

Step S22: Send the frequency band list or the cell list to the terminal, to instruct the terminal to search for a cell in the frequency band list or in the cell list when performing cell selection, cell reselection, or connection re-establishment.

It should be noted that, in each transmission process of step S22, step S21 is not necessary. For example, the base station may perform step S21 only once and perform step S22 a plurality of times.

The following describes two ways to send the frequency band list or cell list to the terminal:

One is to broadcast the SIB information, and carry the frequency band list or cell list in the SIB information. Here, the base station can extend the existing SIB message to carry the uplink frequency band list or the cell list information, or the base station newly adds a SIB message specifically carrying the frequency band list or the cell list.

The other is to carry the frequency band list or the cell list in the RRC connection release message by sending an RRC connection release message to the terminal. When the terminal accesses the network, for example, the terminal is powered on for network attachment operation, and the base station and the terminal establish an RRC connection. After the RRC connection is established, the base station sends an RRC connection release message to the terminal before the terminal enters the idle state. The established RRC connection, in which the base station can carry the frequency band list or the cell list through the RRC connection release message, so as to achieve the purpose of transmitting the information of the forbidden camp cell to the terminal.

In this embodiment, the base station sends the information of the forbidden cell to the terminal in advance, so that the terminal does not attempt to camp in the cell that is prohibited from camping in the cell selection, cell reselection, or connection re-establishment, thereby lowering the terminal station. The possibility of failure is left, thereby reducing the time taken by the terminal to perform cell selection, cell reselection, or connection re-establishment, and this method is advantageous for implementing terminal energy saving.

The apparatus for performing the above methods will be described below.

Please refer to FIG. 3, which is a schematic structural diagram of an embodiment of a terminal of the present invention. The terminal 1 includes: a receiving unit 11 configured to receive a frequency band list or a cell list from a base station, where the cell in the frequency band list or the cell list is a forbidden camping cell.

The base station transmits the information of the forbidden cell to the terminal in a band list manner when one or some frequency bands are all provided for use by the forbidden camping cell. When a certain frequency band is provided to the no-parking cell When used and provided to a normal cell (non-banned camping cell), the base station transmits the information of the camping cell to the terminal in a cell list manner.

Further, the frequency band in the foregoing frequency band list may be an NCT frequency band, and the NCT frequency band means that all cells in the frequency band are NCT cells. The cell in the cell list in the above is an NCT cell. Since the NCT cell cannot be independently configured to the terminal, it can only be configured as a secondary cell to the terminal. Therefore, the NCT cell is a cell in which the terminal is prohibited from camping.

The receiving unit 11 is configured to read a SIB (System Information Block) message broadcast by the cell, where the SIB message carries the frequency band list or the cell list. Here, the base station can extend the existing SIB message to carry the upper band list or the cell list information, or the base station adds a SIB message specifically carrying the band list or the cell list. Here, after the terminal accesses the network, for example, the power-on attachment network is performed, and the SIB message broadcast by the cell is read by the receiving unit 11.

The receiving unit 11 is configured to receive an RRC connection release message from the base station when the RRC connection of the terminal is released by the base station, where the RRC connection release message carries the frequency band list or the cell list. When the terminal accesses the network, for example, the terminal is powered on for network attachment operation, and the terminal and the base station establish an RRC connection. After the RRC connection is established, the base station sends an RRC connection release message to the terminal before the terminal enters the idle state. The established RRC connection; at this time, the base station may carry the frequency band list or the cell list through the RRC connection release message to achieve the purpose of transmitting the information of the forbidden camp cell to the terminal.

The searching unit 12 is configured to search for a cell to camp when performing cell selection, cell reselection, or connection re-establishment, but when searching for a cell, prohibit searching for a cell in the cell list or in the cell list received by the receiving unit 11.

The difference between the search unit 12 and the existing one is that when performing cell selection, cell reselection or connection re-establishment, since the receiving unit 11 has received the forbidden camping cell information, the searching unit 12 does not search for these cells. In addition, the process of the search unit 12 searching and camping on the remaining cells is well known to those skilled in the art, and details are not described herein.

In this embodiment, when the terminal selects, reselects, or re-establishes the connection, the terminal does not perform a search for the forbidden camping cell (preferably, the camping cell is prohibited to be an NCT cell), that is, does not attempt to camp in the cell that is prohibited from camping. Therefore, the possibility of terminal camping failure can be reduced, and the time taken by the terminal in performing cell selection, cell reselection, or connection re-establishment can be reduced, and the terminal can be saved. Please refer to FIG. 4, which is a schematic structural diagram of an embodiment of a base station according to the present invention. The base station 2 includes: an obtaining unit 21, configured to acquire a frequency band list or a cell list, where the cell in the frequency band list or the cell list is a forbidden camping cell.

The obtaining unit 21 may obtain the frequency band list or the cell list of the base station in the network or the adjacent base station by using an OAM (Operation and Maintenance Management), etc. The frequency band list obtained herein may refer to the NCT frequency band, and the cell obtained here The list may refer to an NCT cell list, that is, the cell in the cell list is an NCT cell. It should be noted that, if a certain frequency band is planned to be used by a prohibited camping cell during the network planning period, the above operation is performed to obtain a frequency band list; if in the network planning, a certain frequency band is planned as When it is forbidden to camp on the cell and used by the normal cell, the above operation is performed to obtain the cell list.

In this example, the forbidden camping cell may refer to those that are configured to use the NCT carrier. Since the cell is configured to use the NCT carrier, the cell cannot be independently configured to the terminal, and can only be configured as a secondary cell to the terminal. Any resident attempts on this cell will fail.

The sending unit 22 is configured to send the frequency band list or the cell list to the terminal, to instruct the terminal to search for a cell in the frequency band list or in the cell list when performing cell selection, cell reselection, or connection re-establishment.

It should be noted that the acquisition operation of the acquisition unit 21 is not necessary during each transmission of the transmission unit 22. For example: The base station can perform the acquisition unit 21 only once and the transmission unit 22 multiple times.

In this embodiment, the base station sends the information of the forbidden cell to the terminal in advance, thereby causing the terminal to In cell selection, cell reselection or connection re-establishment, no attempt is made to camp in a cell that is forbidden to camp, so that the possibility of terminal camping failure can be reduced, thereby reducing terminal selection, cell reselection or connection reestablishment. The time spent in the immediate time, and this way is conducive to energy saving in the terminal.

A person skilled in the art can understand that all or part of the process of implementing the above embodiment method can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. In execution, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and those skilled in the art can understand all or part of the process of implementing the above embodiments, and according to the claims of the present invention. The equivalent change is still within the scope of the invention.

Claims

Rights request

1. A cell residency method, characterized by including:

Receive a frequency band list or a cell list from the base station, and the cells under the frequency band list or in the cell list are prohibited cells;

When performing cell selection, cell reselection or connection re-establishment, a cell is searched for camping, but when searching for a cell, it is prohibited to search for cells under the frequency band list or in the cell list.

2. The method of claim 1, wherein the receiving the frequency band list or cell list from the base station includes:

Read the system information block SIB information of the cell, the SIB information carries the frequency band list or cell list; or

Receive a radio resource control RRC connection release message from the base station, where the RRC connection release message carries the frequency band list or cell list.

3. The method according to claim 1 or 2, characterized in that the frequency band in the frequency band list is a new carrier type NCT frequency band, or the cell in the cell list is an NCT cell.

4. A cell residency method, characterized by including:

Send a frequency band list or a cell list to the terminal, and the cells under the frequency band list or in the cell list are prohibited cells to instruct the terminal to prohibit searching for the frequency band when performing cell selection, cell reselection or connection re-establishment. cells under the list or in the cell list.

5. The method of claim 4, wherein sending the frequency band list or cell list to the terminal includes:

Broadcast SIB information, where the SIB information carries the frequency band list or cell list; or send an RRC connection interpretation message to the terminal, where the RRC connection interpretation message carries the frequency band list or cell list.

6. The method according to claim 4 or 5, characterized in that: the frequency band in the frequency band list is a new carrier type NCT frequency band, or the cell in the cell list is an NCT cell;

Before sending the frequency band list or cell list to the terminal, the method further includes: obtaining the frequency band list or cell list.

7. A terminal, characterized by including:

A receiving unit, configured to receive a frequency band list or a cell list from the base station, where the cells under the frequency band list or in the cell list are prohibited cells;

The search unit is used to search for cells to camp on when performing cell selection, cell reselection or connection re-establishment. However, when searching for cells, it is prohibited to search for cells under the frequency band list or in the cell list.

8. The terminal according to claim 7, characterized in that,

The receiving unit is used to read the SIB information of the cell, and the SIB information carries the frequency band list or cell list; or

The receiving unit is configured to receive an RRC connection interpretation message from a base station, where the RRC connection interpretation message carries the frequency band list or cell list.

9. The terminal according to claim 7 or 8, wherein the frequency band in the frequency band list is an NCT frequency band, or the cell in the cell list is an NCT cell.

10. A base station, characterized in that it includes:

A sending unit, configured to send a frequency band list or a cell list to the terminal. The cells under the frequency band list or in the cell list are prohibited cells to instruct the terminal to perform cell selection, cell reselection or connection re-establishment. Searching for cells under the frequency band list or in the cell list is prohibited.

11. The base station according to claim 10, characterized in that,

The sending unit is used to broadcast SIB information, and the SIB information carries the frequency band list or cell list; or

The sending unit is configured to send an RRC connection interpretation message to the terminal, where the RRC connection interpretation message carries the frequency band list or cell list.

12. The base station according to claim 10 or 11, wherein the frequency band in the frequency band list is a new carrier type NCT frequency band, or the cell in the cell list is an NCT cell;

The base station further includes: an acquisition unit, configured to acquire the frequency band list or cell list before sending the frequency band list or cell list to the terminal.