CN106993324B

CN106993324B - Cell selection method and device

Info

Publication number: CN106993324B
Application number: CN201610038902.3A
Authority: CN
Inventors: 杜婷
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2016-01-20
Filing date: 2016-01-20
Publication date: 2020-07-07
Anticipated expiration: 2036-01-20
Also published as: CN106993324A; WO2017124805A1

Abstract

The invention provides a cell selection method and a cell selection device. Wherein, the method comprises the following steps: detecting a link state between a current base station and an Evolved Packet Core (EPC) network; and when the link state is detected to be changed from the normal state to the abnormal state, transmitting an indication signaling carrying the abnormal state indication information to the terminal, wherein the indication signaling is used for indicating that the terminal forbids or forbids to select the cell in the cell list information of the cell under the jurisdiction of the current base station within a preset time period for cell access. The invention solves the problem that the terminal energy consumption is larger because the terminal can only be controlled not to access the current cell through the cell level parameters but still needs to search other cells under the base station with abnormal current and Evolved Packet Core (EPC) network links in the related technology, thereby achieving the effect of reducing the terminal energy consumption.

Description

Cell selection method and device

Technical Field

The present invention relates to the field of communications, and in particular, to a cell selection method and apparatus.

Background

In LTE-long term evolution technology, the problem can be solved by designing an algorithm, for example, when a link between a (nomadic) evolved node b (N) eNB and a core network is detected to be abnormal (e.g., disconnection of port S1), setting a cellBarred value as a parameter in a system message SIB1, and sending the message to a terminal to control the terminal not to access a cell where the terminal is currently located. However, the parameters carried in the message sent by the base station are cell level parameters, and the terminal still searches for other cells governed by the eNB (N) after receiving the cell level parameters, which results in higher energy consumption of the terminal.

An effective solution to the above-mentioned problems in the related art has not been proposed.

Disclosure of Invention

The invention provides a cell selection method and a cell selection device, which at least solve the problem that in the related technology, a terminal can only be controlled by cell level parameters to not access a current cell, but the terminal still needs to search other cells under a base station with abnormal current and Evolved Packet Core (EPC) network links, so that the energy consumption of the terminal is high.

According to an aspect of the present invention, there is provided a cell selection method, including: detecting a link state between a current base station and an Evolved Packet Core (EPC) network; and when the link state is detected to be changed from the normal state to the abnormal state, transmitting an indication signaling carrying the abnormal state indication information to a terminal, wherein the indication signaling is used for indicating that the terminal forbids or forbids to select a cell in the cell list information of the cell under the jurisdiction of the current base station within a preset time period for cell access.

Optionally, the indication signaling further carries the cell list information.

Optionally, before issuing the indication signaling carrying the abnormal state indication information to the terminal, the method further includes: and transmitting the cell list information to the terminal in a broadcast message mode.

Optionally, the indication signaling is sent to the terminal in a broadcast message manner.

Optionally, the prohibiting or prohibiting, within a predetermined time period, selection of a cell in the cell list information of the cell dominated by the current base station to perform cell access includes: and the terminal pulls all cell information included in the cell list information into a cell search blacklist so as to forbid the terminal or forbid the terminal to select the cell in the cell list information for cell access within a preset time period.

Optionally, when it is detected that the link state is changed from the abnormal state to the normal state, the method further includes: and deleting the indication signaling.

Optionally, the change from the normal state to the abnormal state includes at least one of: an S1 port outage between the current base station and the EPC network, and an S1 link quality between the current base station and the EPC network are below a predetermined threshold.

According to another aspect of the present invention, there is provided a cell selection method, including: receiving an indication signaling sent by a current base station, wherein the indication signaling carries abnormal state indication information when a link state between the current base station and an Evolved Packet Core (EPC) network is changed from a normal state to an abnormal state; and prohibiting or prohibiting the selection of the cell in the cell list information of the cell dominated by the current base station for cell access in a preset time period according to the indication signaling.

Optionally, the indication signaling further carries the cell list information.

Optionally, before receiving the indication signaling sent by the current base station, the method further includes: and acquiring and storing the cell list information issued by the current base station in a broadcast message mode.

Optionally, the prohibiting or prohibiting, within a predetermined time period, selection of a cell in the cell list information of the cell dominated by the current base station to perform cell access includes: pulling all cell information included in the cell list information into a cell search blacklist; and starting a timer, and deleting the information of all the cells from the cell search blacklist when the timer reaches the preset time period.

According to still another aspect of the present invention, there is provided a cell selection apparatus including: the detection module is used for detecting the link state between the current base station and the EPC network; and the first processing module is used for sending an indication signaling carrying the abnormal state indication information to a terminal when detecting that the link state is changed from the normal state to the abnormal state, wherein the indication signaling is used for indicating that the terminal forbids or forbids to select a cell in the cell list information of the cell under the jurisdiction of the current base station for cell access in a preset time period.

Optionally, the indication signaling further carries the cell list information.

Optionally, the apparatus further comprises: and the second processing module is used for issuing the cell list information to the terminal in a broadcast message mode before issuing the indication signaling carrying the abnormal state indication information to the terminal.

Optionally, the indication signaling is further configured to instruct the terminal to pull all cell information included in the cell list information into a cell search blacklist, so as to prohibit the terminal or prohibit the terminal from selecting a cell in the cell list information for cell access within a predetermined time period.

Optionally, the apparatus further comprises: and the deleting module is used for deleting the indication signaling when the link state is detected to be changed from the abnormal state to the normal state.

According to still another aspect of the present invention, there is provided a cell selection apparatus including: a receiving module, configured to receive an indication signaling sent by a current base station, where the indication signaling carries abnormal state indication information when a link state between the current base station and an Evolved Packet Core (EPC) network changes from a normal state to an abnormal state; and the forbidding module is used for forbidding or forbidding to select the cell in the cell list information of the cell under the jurisdiction of the current base station for cell access in a preset time period according to the indication signaling.

Optionally, the indication signaling further carries the cell list information.

Optionally, the apparatus further comprises: and the third processing module is used for acquiring and storing the cell list information issued by the current base station in a broadcast message mode before receiving the indication signaling issued by the current base station.

Optionally, the disabling module includes: a first processing unit, configured to pull all cell information included in the cell list information into a cell search blacklist; and the second processing unit is used for starting a timer and deleting the information of all the cells from the cell search blacklist when the timer reaches the preset time period.

According to the invention, the link state between the current base station and the EPC network is detected; and when the link state is detected to be changed from the normal state to the abnormal state, transmitting an indication signaling carrying the abnormal state indication information to the terminal, wherein the indication signaling is used for indicating that the terminal forbids or forbids to select the cell in the cell list information of the cell under the jurisdiction of the current base station within a preset time period for cell access. That is to say, when detecting that the link state between the current base station and the EPC network is an abnormal state, the present invention issues the cell list information of the cell under the jurisdiction of the current base station and the indication information of the abnormal state to the terminal, so that the terminal can select not to access the cell under the jurisdiction of the current base station or select not to access the cell under the jurisdiction of the current base station within a predetermined time period according to the received indication signaling, but can quickly search for the cell with the link state in a normal state, thereby avoiding the problem that the terminal can only be controlled not to access the current cell by the cell level parameter, but the terminal still needs to search other cells under the base station with abnormal link with the EPC network of the current and EPC network of the evolved packet core, which results in large energy consumption of the terminal, and further achieving the effect of reducing energy consumption of the terminal.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a flow chart of a method of cell selection according to an embodiment of the present invention;

fig. 2 is a flowchart (one) of a cell selection method according to an embodiment of the present invention;

fig. 3 is a flow chart of a cell selection method according to an embodiment of the present invention (two);

fig. 4 is a flow chart of another cell selection method according to an embodiment of the present invention;

fig. 5 is a flow chart of a method of cell selection according to an alternative embodiment of the invention (iii);

fig. 6 is a flow chart of a method of cell selection according to an alternative embodiment of the present invention (four);

fig. 7 is a block diagram of a cell selection apparatus according to an embodiment of the present invention;

fig. 8 is a block diagram (one) of a cell selection apparatus according to an embodiment of the present invention;

fig. 9 is a block diagram of a structure of a cell selection apparatus according to an embodiment of the present invention (two);

fig. 10 is a block diagram of another cell selection apparatus according to an embodiment of the present invention;

fig. 11 is a block diagram (one) of another cell selection apparatus according to an embodiment of the present invention;

fig. 12 is a block diagram of another cell selection apparatus according to an embodiment of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

In this embodiment, a method for cell selection is provided, and fig. 1 is a flowchart of a method for cell selection according to an embodiment of the present invention, as shown in fig. 1, the flowchart includes the following steps:

step S102, detecting the link state between the current base station and an EPC network;

step S104, when detecting that the link state is changed from the normal state to the abnormal state, sending an indication signaling carrying the abnormal state indication information to the terminal, wherein the indication signaling is used for indicating that the terminal forbids or forbids to select the cell in the cell list information of the cell under the jurisdiction of the current base station within a preset time period to carry out cell access.

Optionally, in this embodiment, an application scenario of the cell selection method includes, but is not limited to: detecting interruption of an S1 port between a current base station and an Evolved Packet Core (EPC) network, and detecting that the quality of an S1 link between the current base station and the EPC network drops to a certain threshold value. In the application scenario, detecting the link state between the current base station and an Evolved Packet Core (EPC) network; and when the link state is detected to be changed from the normal state to the abnormal state, transmitting an indication signaling carrying the abnormal state indication information to the terminal, wherein the indication signaling is used for indicating that the terminal forbids or forbids to select the cell in the cell list information of the cell under the jurisdiction of the current base station within a preset time period for cell access. That is to say, in this embodiment, when it is detected that the link state between the current base station and the EPC network is an abnormal state, the cell list information of the cell under the jurisdiction of the current base station and the indication information of the abnormal state are issued to the terminal, so that the terminal selects not to access the cell under the jurisdiction of the current base station or selects not to access the cell under the jurisdiction of the current base station within a predetermined time period according to the received indication signaling, and can search for a cell with the link state in a normal state, thereby avoiding a problem that the terminal can only be controlled not to access the cell under the jurisdiction by using the cell level parameter, but the terminal still needs to search for other cells under the base station with the link abnormality between the current base station and the EPC network, which results in a large energy consumption of the terminal, and further achieving an effect of reducing the energy consumption of the terminal.

It should be noted that the value of the predetermined time period may be any time period greater than 0, and is not limited herein.

Optionally, in this embodiment, the link status includes, but is not limited to: the state of an S1 port between the base station and the EPC network, and the state of an S1 link between the current base station and the EPC network; the above-mentioned link state changing from the normal state to the abnormal state includes but is not limited to: an interruption of an S1 port between the current base station and the EPC network; the S1 link quality between the current base station and the EPC network drops to a certain threshold value, which is not limited herein.

Optionally, in this embodiment, the indication signaling may only carry the abnormal state indication information; or, the abnormal state indication information and the cell list information may also be carried.

In the following, with reference to a specific example, two kinds of indication signaling, that is, the indication signaling carrying only the abnormal state indication information and the indication signaling carrying the abnormal state indication information and the cell list information, are described in this embodiment respectively. The current base station is illustrated by using a (nomadic) evolved node b (N) eNB as an example.

In one example of this embodiment, when a (Nomadic) evolved base station (Nomadic, abbreviated as N) (evolvedNode B, abbreviated as eNB) detects an interruption of S1 port with EPC, or when S1 link quality drops to a certain threshold, trigger (N) eNB to generate an indication signaling (e.g., Search _ barredlst), which contains (N) a list of cells under the jurisdiction of eNB. And broadcasting in a broadcast message (such as SIB1), the UE obtaining the indication signaling will prohibit the user from performing measurement search on the cells in the list (the terminal UE pulls the cells in the list into a blacklist), and starts a timer, the time is set to be T, when the timer expires, the UE deletes the cells previously pulled into the blacklist from the blacklist, the UE can search the cell under the eNB (N) (if the UE does not leave the original cell), if the S1 port is recovered, the cell is accessed, if the S1 port is still disconnected, the above steps are repeated, the cells governed by the eNB (N) are pulled into the blacklist, and the timer is started.

In another example of this embodiment, when the UE enters a cell under the jurisdiction of the eNB (N), the eNB (N) broadcasts its governed cell List information MyCell _ List in a system broadcast message, and obtains and stores this List information. When the (N) eNB is interrupted with the port S1 of the macro EPC, or the S1 link quality drops to a certain threshold value, triggering the (N) eNB to generate an indication signaling (e.g. S1_ INTERRUPT), broadcasting through a system broadcast message (e.g. SIB1), after obtaining the information, the terminal UE triggers to pull the cells in the list previously stored into a blacklist, and starting a timer, setting the time to be T, when the timer expires, the terminal UE deletes the cells in the list previously pulled into the blacklist from the blacklist, but still stores the cells in a SIM (USIM) card, the UE can search the cell under the (N) eNB again (if the terminal UE does not leave the original cell), if the port S1 recovers, the cell is accessed, if the port S1 is still disconnected, the steps are repeated, the cells under the (N) eNB are pulled into the blacklist, and the timer is started.

In an optional implementation manner, the indication signaling sent by the current base station to the terminal also carries cell list information.

By simultaneously issuing the cell list information and the abnormal state indication information to the terminal, the terminal can forbid searching all cells in the cell list according to the indication information, and the energy consumption of the terminal during searching is reduced. And if there is a cell under the base station with a normal link with the EPC (e.g., normal port S1), the time delay for the terminal to search for the cell under the base station with a normal link with the EPC can be further shortened.

In an optional implementation manner, before issuing the indication signaling carrying the abnormal state indication information to the terminal, the method further includes the following steps:

and step S11, the cell list information is sent to the terminal by the broadcast message.

Optionally, in this embodiment, when the current base station detects that the link state between the current base station and the EPC network changes from a normal state to an abnormal state, the current base station may only issue an indication signaling carrying the indication information of the abnormal state to the terminal, but before detecting the link state between the current base station and the EPC network, issue the cell list information to the terminal in a broadcast message manner, so that after receiving the indication signaling carrying the indication information of the abnormal state sent by the current base station, the terminal may prohibit the terminal from accessing the cell included in the cell list information, thereby reducing energy consumption when the terminal searches. And if there is a cell under the base station with a normal link with the EPC (e.g., normal port S1), the time delay for the terminal to search for the cell under the base station with a normal link with the EPC can be further shortened.

In an optional embodiment, the indication signaling is sent to the terminal by way of a broadcast message.

It should be noted that, in this embodiment, the broadcast message may be a SIBI.

The indication signaling is sent to the terminal in a broadcast message mode, so that the terminal accessed into the cell under the control of the current base station can receive the indication signaling instead of sending the indication signaling to the terminal in sequence, and the process of sending the indication signaling by the current base station is simplified.

In an optional embodiment, the prohibiting or prohibiting, within a predetermined time period, selection of a cell in the cell list information of the cell under the jurisdiction of the current base station to perform cell access includes the following steps:

in step S21, the terminal pulls all cell information included in the cell list information into a cell search blacklist to prohibit the terminal or prohibit the terminal from selecting a cell in the cell list information for cell access within a predetermined time period.

Optionally, in this embodiment, all cell information included in the cell list information issued by the current base station is pulled into the cell search blacklist, so that the terminal may be prohibited from selecting a cell in the cell list information for cell access, and energy consumption during terminal search is reduced. And if there is a cell under the base station with a normal link with the EPC (e.g., normal port S1), the time delay for the terminal to search for the cell under the base station with a normal link with the EPC can be further shortened.

In an optional embodiment, upon detecting that the link status changes from the abnormal status to the normal status, the method further comprises the steps of:

step S31, the indication signaling is deleted.

Optionally, in this embodiment, when it is detected that the link state between the current base station and the EPC network is changed from the abnormal state to the normal state, the current base station deletes the indication signaling, so that the terminal can normally access the cell under the jurisdiction of the current base station.

In an optional embodiment, the change of the link state between the current base station and the evolved packet core EPC network from the normal state to the abnormal state includes at least one of: the S1 port interruption between the current base station and the EPC network, and the S1 link quality between the current base station and the EPC network are lower than the preset threshold.

The present embodiment will be described below with reference to specific examples.

In one example of the present embodiment, cell selection is mainly performed from the current base station (e.g., (N) eNB) side. The current indication signaling carries abnormal state indication information and cell list information. The following description is made with reference to fig. 2, wherein the following steps are included:

step S201, (N) eNB detects that S1 port will be disconnected, or S1 link quality is reduced to a certain threshold value) or just disconnected;

step S202, triggering (N) eNB to generate an indication signaling Search _ BarredList, wherein the indication includes (N) list information of a cell (including a cell ID) managed by the eNB and interruption indication information of an S1 port;

step S203, (N) the eNB broadcasts Search _ barredlst information in a broadcast message (e.g., SIB 1);

the terminal UE starts a timer, the time is set to be T, when the timer is up, the UE deletes the cell of the Search _ barredlst previously pulled into the blacklist from the blacklist, and the UE can Search for the cell A under the eNB again (N) (if the UE does not leave the original cell);

step S204, (N) the eNB detects whether the port S1 recovers, if yes, the step S205 is executed, and if no, the step S203 is executed;

step S205, triggering (N) the eNB to delete the Search _ barredlst information (e.g., S1 gateway interrupt indication information), and the UE camping on the cell governed by the eNB (N).

In another example of the present embodiment, cell selection is also mainly performed from the current base station (e.g., N) eNB) side. Wherein, the current indication signaling carries the abnormal state indication information. The following description is made with reference to fig. 3, wherein the following steps are included:

step S301, (N) eNB includes List information (for example, MyCell _ List) of all cells under its jurisdiction into system information and broadcasts the system information to each cell (for example, SIB 1);

(N) reading the list of all cells managed by the eNB by the UE of the cell managed by the eNB, and storing the list;

step S302, (N) the eNB detects whether the port S1 is disconnected, whether the link quality of S1 is reduced to a certain threshold value or not, if so, the step S303 is executed, if not, the eNB continues to detect whether the port S1 is disconnected, whether the link quality of S1 is reduced to a certain threshold value or not, and if not, the eNB continues to detect whether the port S1 is disconnected or not;

step S303, triggering (N) the eNB to generate an indication signaling S1_ INTERRUPT, and broadcasting the information in a system broadcast message;

the UE acquires the indication signaling to trigger the user to pull the cell in the List MyCell _ List into a cell search blacklist;

the UE starts a timer, the time is set to be T, when the timer is up, the UE deletes the cell pulled into the blacklist from the blacklist and still stores the cell in an SIM (USIM) card, and the UE can search (N) the cell A under the eNB (if the UE does not leave the original cell);

step S304, (N) the eNB detects whether the port S1 recovers, if so, the step S305 is executed; if not, step S303;

step S305, triggering (N) eNB to delete S1_ INTERRUP information, such as S1 port interrupt indication information, and then UE can reside in the cell governed by (N) eNB.

A method for cell selection is further provided in this embodiment, and fig. 4 is a flowchart of another method for cell selection according to an embodiment of the present invention, as shown in fig. 4, the flowchart includes the following steps:

step S402, receiving an indication signaling sent by a current base station, wherein the indication signaling carries abnormal state indication information when a link state between the current base station and an Evolved Packet Core (EPC) network is changed from a normal state to an abnormal state;

and step S404, according to the indication signaling, prohibiting or prohibiting selecting the cell in the cell list information of the cell under the jurisdiction of the current base station within a preset time period to carry out cell access.

Optionally, in this embodiment, an application scenario of the cell selection method includes, but is not limited to: detecting interruption of an S1 port between a current base station and an Evolved Packet Core (EPC) network, and detecting that the quality of an S1 link between the current base station and the EPC network drops to a certain threshold value. In the application scenario, a terminal receives an indication signaling sent by a current base station, wherein the indication signaling carries abnormal state indication information when a link state between the current base station and an Evolved Packet Core (EPC) network is changed from a normal state to an abnormal state; and the terminal forbids or forbids to select the cell in the cell list information of the cell dominated by the current base station for cell access according to the indication signaling. That is to say, in this embodiment, when the terminal receives the indication signaling sent by the current base station and carrying the abnormal state indication information when the link state between the current base station and the evolved packet core EPC network changes from the normal state to the abnormal state, forbidding to select the cell in the cell list information of the cell under the jurisdiction of the current base station for cell access, or forbidding to select the cell in the cell list information of the cell under the jurisdiction of the current base station for cell access in a preset time period, searching the cell with the link state in the normal state, therefore, the problem that the terminal energy consumption is large because the terminal can only be controlled not to access the current cell through the cell level parameters but still needs to search other cells under the base station with the current and abnormal Evolved Packet Core (EPC) network links is solved, and the effect of reducing the terminal energy consumption is achieved.

Optionally, in this embodiment, the indication signaling may be an indication signaling that only carries the abnormal state indication information; or, the indication signaling may also carry the abnormal state indication information and the cell list information.

In the following, with reference to a specific example, two kinds of indication signaling, that is, the indication signaling carrying only the abnormal state indication information and the indication signaling carrying the abnormal state indication information and the cell list information, are described in this embodiment respectively. The current base station is illustrated by taking an (mobile) evolved node b (N) eNB as an example.

In one example of this embodiment, when a (Nomadic) evolved base station (Nomadic, abbreviated as N) (evolved node B, abbreviated as eNB) detects an S1 port interruption with the EPC, or when the S1 link quality drops to a certain threshold, the eNB is triggered to generate an indication signaling (e.g., Search _ barredlst), which includes (N) a list of cells under the jurisdiction of the eNB. And broadcasting in a broadcast message (such as SIB1), the UE obtaining the indication signaling will prohibit the user from performing measurement search on the cells in the list (the terminal UE pulls the cells in the list into a blacklist), and starts a timer, the time is set to be T, when the timer expires, the UE deletes the cells previously pulled into the blacklist from the blacklist, the UE can search the cell under the eNB (N) (if the UE does not leave the original cell), if the S1 port is recovered, the cell is accessed, if the S1 port is still disconnected, the above steps are repeated, the cells governed by the eNB (N) are pulled into the blacklist, and the timer is started.

In another example of this embodiment, (N) eNB broadcasts its governed cell List information MyCell _ List in a system broadcast message, and when UE enters the cell governed by (N) eNB, this List information is obtained and saved. When the (N) eNB is interrupted with the port S1 of the macro EPC, or the S1 link quality drops to a certain threshold value, triggering the (N) eNB to generate an indication signaling (e.g. S1_ INTERRUPT), broadcasting through a system broadcast message (e.g. SIB1), after obtaining the information, the terminal UE triggers to pull the cells in the list previously stored into a blacklist, and starting a timer, setting the time to be T, when the timer expires, the terminal UE deletes the cells in the list previously pulled into the blacklist from the blacklist, but still stores the cells in a SIM (USIM) card, the UE can search the cell under the (N) eNB again (if the terminal UE does not leave the original cell), if the port S1 recovers, the cell is accessed, if the port S1 is still disconnected, the steps are repeated, the cells under the (N) eNB are pulled into the blacklist, and the timer is started.

In an optional embodiment, the indication signaling further carries the cell list information.

Optionally, in this embodiment, after receiving the indication signaling that also carries the cell list information, the terminal may prohibit searching for all cells in the cell list according to the indication information, so as to reduce energy consumption when the terminal searches for the cells. And if there is a cell under the base station with a normal link with the EPC (e.g., normal port S1), the time delay for the terminal to search for the cell under the base station with a normal link with the EPC can be further shortened.

In an optional implementation manner, before receiving the indication signaling sent by the current base station, the method further includes the following steps:

step S41, obtaining and storing the cell list information issued by the current base station in a broadcast message manner.

Optionally, in this embodiment, after accessing to the cell within the jurisdiction of the current base station, the terminal acquires and stores the cell list information issued by the current base station in a broadcast message manner, so that after receiving the indication signaling carrying the abnormal state indication information sent by the current base station, the terminal may prohibit the terminal from accessing to the cell included in the cell list information according to the acquired and stored cell list information, thereby reducing energy consumption during terminal search. And if there is a cell under the base station with a normal link with the EPC (e.g., normal port S1), the time delay for the terminal to search for the cell under the base station with a normal link with the EPC can be further shortened.

In an optional embodiment, prohibiting or prohibiting, within a predetermined time period, selecting a cell in the cell list information of the cell dominated by the current base station to perform cell access includes the following steps:

step S51, pulling all cell information included in the cell list information into a cell search blacklist;

step S52, a timer is started, and when the timer reaches the predetermined time period, all cell information is deleted from the cell search black list.

Optionally, in this embodiment, all cell information included in the cell list information issued by the current base station is pulled into the cell search blacklist, so that the terminal may be prohibited from selecting all cells in the cell list information for cell access, and energy consumption during terminal search is reduced. And if there is a cell under the base station with a normal link with the EPC (e.g., normal port S1), the time delay for the terminal to search for the cell under the base station with a normal link with the EPC can be further shortened. And meanwhile, after all cell information included in the cell list information is pulled into a cell search blacklist, a timer is started, so that when the timer reaches preset time and the link state is detected to be changed from the abnormal state to the normal state, the terminal can be timely and quickly accessed to the cell managed by the current base station.

In an optional embodiment, the detecting, by the current base station, that the link state between the current base station and the evolved packet core EPC network changes from a normal state to an abnormal state includes at least one of: the S1 port between the current base station and the EPC network is interrupted, and the quality of the S1 link between the current base station and the EPC network is lower than a preset threshold value.

In an example of this embodiment, the current indication signaling carries the abnormal state indication information and the cell list information, and the current base station takes (N) eNB as an example for description. The following description is made with reference to fig. 5, wherein the following steps are included:

(N) when the eNB detects that the port S1 is disconnected (the link quality of S1 is reduced to a certain threshold value) or just disconnected, triggering (N) the eNB to generate an indication signaling Search _ BarredList, wherein the indication contains (N) cell (including cell ID) information governed by the eNB and interruption indication information of the port S1; (N) the eNB broadcasts Search _ barredlst in a broadcast message (such as SIB 1);

step S501, UE reads the Search _ BarredList information to pull the cell in the information into a blacklist;

step S502, UE starts a timer, the set time is T, when the timer is up, the UE deletes the cell of Search _ BarredList previously pulled into the blacklist from the blacklist;

step S503, the UE may search for the cell a under eNB (N) again (if the UE does not leave the original cell);

step S504, UE judges whether to read Search _ BarredList information, if not, step S505 is executed, if yes, step S501 is executed;

step S505, the UE camps on cell a under the eNB.

In another example of this embodiment, the current indication signaling carries the abnormal state indication information, and the current base station takes (N) eNB as an example for description. The following description is made with reference to fig. 6, wherein the following steps are included:

(N) eNB includes the List MyCell _ List of all cells under its jurisdiction into the system information and broadcasts to each cell (for example, SIB 1). And the UE reads the list of all cells belonging to the UE and stores the list. (N) when the eNB detects that the port S1 is disconnected (the link quality of S1 is reduced to a certain threshold value) or just disconnected, triggering (N) the eNB to generate an indication signaling S1_ INTERRUPT, and broadcasting the information in a system broadcast message;

step S601, the UE reads S1_ INTERRUPT information to pull the cell in the information into a blacklist;

step S602, UE starts a timer, the set time is T, when the timer is up, UE deletes the cell pulled into the blacklist from the blacklist, but still stores in SIM (USIM) card;

step S603, the UE may search for the cell a under the eNB (N) again (if the UE does not leave the original cell);

step S604, the UE judges whether the S1_ INTERRUPT information is read, if yes, the step S601 is executed, and if not, the step S605 is executed;

step S605, the UE camps on cell a under the (N) eNB.

Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.

In this embodiment, a cell selection apparatus is further provided, and the apparatus is used to implement the foregoing embodiments and preferred embodiments, and the description of the apparatus is omitted for brevity. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

Fig. 7 is a block diagram of a cell selection apparatus according to an embodiment of the present invention, as shown in fig. 7, the apparatus includes:

1) a detection module 72, configured to detect a link state between a current base station and an Evolved Packet Core (EPC) network;

2) a first processing module 74, configured to, when it is detected that the link state is changed from the normal state to the abnormal state, send an indication signaling carrying the indication information of the abnormal state to the terminal, where the indication signaling is used to indicate that the terminal prohibits or prohibits selecting a cell in the cell list information of the cell governed by the current base station for cell access within a predetermined time period.

Optionally, in this embodiment, an application scenario of the cell selection method includes, but is not limited to: detecting interruption of an S1 port between a current base station and an Evolved Packet Core (EPC) network, and detecting that the quality of an S1 link between the current base station and the EPC network drops to a certain threshold value. In the application scenario, detecting the link state between the current base station and an Evolved Packet Core (EPC) network; and when the link state is detected to be changed from the normal state to the abnormal state, transmitting an indication signaling carrying the abnormal state indication information to the terminal, wherein the indication signaling is used for indicating that the terminal forbids or forbids to select the cell in the cell list information of the cell under the jurisdiction of the current base station within a preset time period for cell access. That is to say, in this embodiment, when it is detected that the link state between the current base station and the EPC network is an abnormal state, the cell list information of the cell under the jurisdiction of the current base station and the indication information of the abnormal state are issued to the terminal, so that the terminal selects not to access the cell under the jurisdiction of the current base station according to the received indication signaling, or selects not to access the cell under the jurisdiction of the current base station within a predetermined time period, and can search for a cell with the link state in a normal state, thereby avoiding a problem that the terminal can only be controlled not to access the cell under the current by using the cell level parameter, but the terminal still needs to search for other cells under the base station with the abnormal link with the EPC network of the current EPC network and the EPC network of the evolved packet core, which results in a large energy consumption of the terminal, and further achieves an effect of reducing.

In an alternative implementation manner, fig. 8 is a block diagram (a) of a cell selection apparatus according to an embodiment of the present invention, and as shown in fig. 8, the apparatus includes, in addition to all modules shown in fig. 7:

1) the second processing module 82 is configured to, before issuing the indication signaling carrying the abnormal state indication information to the terminal, issue the cell list information to the terminal in a broadcast message manner.

In an optional embodiment, the indication signaling is further used to instruct the terminal to pull all cell information included in the cell list information into a cell search blacklist, so as to prohibit or prohibit the terminal from selecting a cell in the cell list information for cell access within a predetermined time period.

In an alternative implementation manner, fig. 9 is a block diagram (ii) of a cell selection apparatus according to an embodiment of the present invention, and as shown in fig. 9, the apparatus includes, in addition to all modules shown in fig. 7:

1) a deleting module 92, configured to delete the indication signaling when it is detected that the link status changes from the abnormal status to the normal status.

In an optional embodiment, the change of the link state between the current base station and the evolved packet core EPC network from the normal state to the abnormal state includes at least one of: the S1 port between the current base station and the EPC network is interrupted, and the quality of the S1 link between the current base station and the EPC network is lower than a preset threshold value.

In this embodiment, another cell selection apparatus is further provided, and the apparatus is used to implement the foregoing embodiments and preferred embodiments, which have already been described and are not described again. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

Fig. 10 is a block diagram of another cell selection apparatus according to an embodiment of the present invention, as shown in fig. 10, the apparatus including:

1) a receiving module 102, configured to receive an indication signaling sent by a current base station, where the indication signaling carries abnormal state indication information when a link state between the current base station and an Evolved Packet Core (EPC) network changes from a normal state to an abnormal state;

2) and a forbidding module 104, configured to forbid or forbid, within a predetermined time period, selection of a cell in the cell list information of the cell governed by the current base station for cell access according to the indication signaling.

Optionally, in this embodiment, an application scenario of the cell selection method includes, but is not limited to: detecting interruption of an S1 port between a current base station and an Evolved Packet Core (EPC) network, and detecting that the quality of an S1 link between the current base station and the EPC network is reduced to a certain threshold value. In the application scenario, a terminal receives an indication signaling sent by a current base station, wherein the indication signaling carries abnormal state indication information when a link state between the current base station and an Evolved Packet Core (EPC) network is changed from a normal state to an abnormal state; and the terminal forbids or forbids to select the cell in the cell list information of the cell dominated by the current base station for cell access according to the indication signaling. That is to say, in this embodiment, when the terminal receives the indication signaling sent by the current base station and carrying the abnormal state indication information when the link state between the current base station and the evolved packet core EPC network changes from the normal state to the abnormal state, forbidding to select the cell in the cell list information of the cell under the jurisdiction of the current base station for cell access, or forbidding to select the cell in the cell list information of the cell under the jurisdiction of the current base station for cell access in a preset time period, searching the cell with the link state in the normal state, therefore, the problem that the terminal energy consumption is large because the terminal can only be controlled not to access the current cell through the cell level parameters but still needs to search other cells under the base station with the current and abnormal Evolved Packet Core (EPC) network links is solved, and the effect of reducing the terminal energy consumption is achieved.

In an optional implementation manner, fig. 11 is a block diagram (a) of another cell selection apparatus according to an embodiment of the present invention, and as shown in fig. 11, the apparatus includes, in addition to all modules shown in fig. 10:

1) the third processing module 112 is configured to, before receiving the indication signaling sent by the current base station, obtain and store the cell list information sent by the current base station in a broadcast message manner.

In an optional implementation manner, fig. 12 is a block diagram (ii) of another cell selection apparatus according to an embodiment of the present invention, and as shown in fig. 12, the prohibiting module 104 includes:

1) a first processing unit 122, configured to pull all cell information included in the cell list information into a cell search blacklist;

2) a second processing unit 124, configured to start a timer, and delete the all-cell information from the cell search blacklist when the timer reaches the predetermined time period.

It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in a plurality of processors.

The embodiment of the invention also provides a storage medium. Alternatively, in the present embodiment, the storage medium may be configured to store program codes for performing the following steps:

s1, detecting the link state between the current base station and the EPC network;

and S2, when detecting that the link state is changed from the normal state to the abnormal state, sending an indication signaling carrying the abnormal state indication information to the terminal, wherein the indication signaling is used for indicating that the terminal forbids or forbids to select the cell in the cell list information of the cell under the jurisdiction of the current base station for cell access in a preset time period.

Optionally, the storage medium is further arranged to store program code for performing the steps of:

s3, receiving an indication signaling sent by a current base station, wherein the indication signaling carries abnormal state indication information when a link state between the current base station and an Evolved Packet Core (EPC) network is changed from a normal state to an abnormal state;

and S4, according to the indication signaling, prohibiting or prohibiting in a preset time period selecting the cell in the cell list information of the cell under the jurisdiction of the current base station to carry out cell access.

Optionally, in this embodiment, the storage medium may include, but is not limited to: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

Alternatively, in the present embodiment, the processor executes the above steps S1, S2 according to program codes already stored in the storage medium.

Alternatively, in the present embodiment, the processor executes the above steps S3, S4 according to program codes already stored in the storage medium.

Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.

It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for cell selection, comprising:

detecting a link state between a current base station and an Evolved Packet Core (EPC) network;

and when the link state is detected to be changed from the normal state to the abnormal state, transmitting an indication signaling carrying the abnormal state indication information to a terminal, wherein the indication signaling is used for indicating that the terminal forbids or forbids to select a cell in the cell list information of the cell under the jurisdiction of the current base station within a preset time period for cell access.

2. The method of claim 1, wherein the indication signaling further carries the cell list information.

3. The method of claim 1, wherein before sending the indication signaling carrying the abnormal state indication information to the terminal, the method further comprises:

and transmitting the cell list information to the terminal in a broadcast message mode.

4. The method of claim 2, wherein the indication signaling is sent to the terminal by a broadcast message.

5. The method according to claim 2 or 3, wherein the prohibiting or prohibiting, within a predetermined time period, selecting the cell in the cell list information of the cell governed by the current base station for cell access comprises:

and the terminal pulls all cell information included in the cell list information into a cell search blacklist so as to forbid the terminal or forbid the terminal to select the cell in the cell list information for cell access within a preset time period.

6. The method according to claim 1, wherein upon detecting that the link status changes from the abnormal status to the normal status, the method further comprises:

and deleting the indication signaling.

7. The method of claim 1, wherein the change from the normal state to the abnormal state comprises at least one of: an S1 port outage between the current base station and the EPC network, and an S1 link quality between the current base station and the EPC network are below a predetermined threshold.

8. A method for cell selection, comprising:

receiving an indication signaling sent by a current base station, wherein the indication signaling carries abnormal state indication information when a link state between the current base station and an Evolved Packet Core (EPC) network is changed from a normal state to an abnormal state;

and prohibiting or prohibiting the selection of the cell in the cell list information of the cell dominated by the current base station for cell access in a preset time period according to the indication signaling.

9. The method of claim 8, wherein the indication signaling further carries the cell list information.

10. The method of claim 8, before receiving the indication signaling sent by the current base station, further comprising:

and acquiring and storing the cell list information issued by the current base station in a broadcast message mode.

11. The method according to claim 9 or 10, wherein the prohibiting or prohibiting, within a predetermined time period, selecting a cell in the cell list information of the cell governed by the current base station for cell access comprises:

pulling all cell information included in the cell list information into a cell search blacklist;

and starting a timer, and deleting the information of all the cells from the cell search blacklist when the timer reaches the preset time period.

12. The method of claim 8, wherein the change from the normal state to the abnormal state comprises at least one of: an S1 port outage between the current base station and the EPC network, and an S1 link quality between the current base station and the EPC network are below a predetermined threshold.

13. A cell selection apparatus, comprising:

the detection module is used for detecting the link state between the current base station and the EPC network;

and the first processing module is used for sending an indication signaling carrying the abnormal state indication information to a terminal when detecting that the link state is changed from the normal state to the abnormal state, wherein the indication signaling is used for indicating that the terminal forbids or forbids to select a cell in the cell list information of the cell under the jurisdiction of the current base station for cell access in a preset time period.

14. The apparatus of claim 13, wherein the indication signaling further carries the cell list information.

15. The apparatus of claim 13, further comprising:

and the second processing module is used for issuing the cell list information to the terminal in a broadcast message mode before issuing the indication signaling carrying the abnormal state indication information to the terminal.

16. The apparatus of claim 14, wherein the indication signaling is sent to the terminal by a broadcast message.

17. The apparatus according to claim 14 or 15, wherein the indication signaling is further configured to instruct the terminal to pull all cell information included in the cell list information into a cell search blacklist, so as to prohibit the terminal or prohibit the terminal from selecting a cell in the cell list information for cell access within a predetermined time period.

18. The apparatus of claim 13, further comprising:

and the deleting module is used for deleting the indication signaling when the link state is detected to be changed from the abnormal state to the normal state.

19. The apparatus of claim 13, wherein the change from the normal state to the abnormal state comprises at least one of: an S1 port outage between the current base station and the EPC network, and an S1 link quality between the current base station and the EPC network are below a predetermined threshold.

20. A cell selection apparatus, comprising:

a receiving module, configured to receive an indication signaling sent by a current base station, where the indication signaling carries abnormal state indication information when a link state between the current base station and an Evolved Packet Core (EPC) network changes from a normal state to an abnormal state;

and the forbidding module is used for forbidding or forbidding to select the cell in the cell list information of the cell under the jurisdiction of the current base station for cell access in a preset time period according to the indication signaling.

21. The apparatus of claim 20, wherein the indication signaling further carries the cell list information.

22. The apparatus of claim 20, further comprising:

and the third processing module is used for acquiring and storing the cell list information issued by the current base station in a broadcast message mode before receiving the indication signaling issued by the current base station.

23. The apparatus of claim 21 or 22, wherein the disabling module comprises:

a first processing unit, configured to pull all cell information included in the cell list information into a cell search blacklist;

and the second processing unit is used for starting a timer and deleting the information of all the cells from the cell search blacklist when the timer reaches the preset time period.

24. The apparatus of claim 20, wherein the change from the normal state to the abnormal state comprises at least one of: an S1 port outage between the current base station and the EPC network, and an S1 link quality between the current base station and the EPC network are below a predetermined threshold.