WO2012126313A1

WO2012126313A1 - Method and device for reestablishing rrc connection

Info

Publication number: WO2012126313A1
Application number: PCT/CN2012/071693
Authority: WO
Inventors: 常俊仁; 李亚娟; 张永平; 张亮亮
Original assignee: 华为技术有限公司
Priority date: 2011-03-18
Filing date: 2012-02-28
Publication date: 2012-09-27
Also published as: CN102685785B; CN102685785A

Abstract

Disclosed are a method and device for reestablishing a Radio Resource Control (RRC) connection, which belong to the field of ratio communications. The method comprises: when a first RRC connection has a radio link failure, a terminal performing cell reselection; if a cell reselected by the terminal belongs to a second site, or the cell reselected by the terminal and a cell of a second RRC connection belong to the same cell group, the terminal reselecting another cell or the terminal stopping a cell reselection operation and releasing the first RRC connection; and if the cell reselected by the terminal doest not belong to the second site, or the cell reselected by the terminal and the cell of the second RRC connection do not belong to the same cell group, the terminal performing RRC connection reestablishment based on the reselected cell. The present invention provides a reestablishment scheme for maintaining an RRC connection between a terminal and different sites. When a connection between the terminal and one site fails, the terminal can guarantee data services of the terminal through an RRC connection reestablishment process.

Description

Radio resource control method and device for reestablishing RRC connection

This application is submitted to the Chinese Patent Office on March 18, 2011, and the application number is

The priority of the Chinese Patent Application entitled "Method and Apparatus for RRC Connection Re-establishment of Radio Resource Control" is incorporated herein by reference.

Technical field

The present invention relates to the field of wireless communications, and in particular, to a method and device for radio resource control RRC connection re-establishment. Background technique

Carrier aggregation is the aggregation of multiple carriers into a larger bandwidth carrier to support high-speed data rates. In some application scenarios, a terminal needs to aggregate carriers from two different sites, which is called carrier aggregation technology between different sites.

In the context of carrier aggregation between different sites mentioned above, one terminal and the network can maintain one

The RRC (Radio Resource Control) connection can also maintain two RRC connections. The maintenance of an RRC connection means that the terminal only establishes a bearer for transmitting an RRC control message with one of the stations. The so-called maintenance of two RRC connections means that the terminal and the two stations simultaneously establish bearers for transmitting RRC control messages.

Regardless of whether it is a single RRC connection or a dual RRC connection, there may be a case where a connection between the terminal and a certain site fails with a wireless link. Therefore, how to perform RRC connection re-establishment, restore the current service of the terminal, and improve the user experience is a problem that needs to be solved.

Summary of the invention

In order to solve the problem of reestablishing the RRC connection between the terminal and the multiple sites, the embodiment of the present invention provides a method and device for reestablishing the radio resource control RRC connection.

The technical solution is as follows:

A RRC connection re-establishment method, where a terminal currently attached by a terminal includes a first station and a second station, where the terminal maintains a first RRC connection with the first station, and the terminal and the second station Maintaining a second RRC connection, the method includes:

When the first RRC connection fails to generate a radio link, the terminal performs cell reselection; if the cell reselected by the terminal belongs to the second station, or if the terminal reselects small The cell connected to the second RRC belongs to the same cell group, the terminal reselects another cell or the terminal stops the cell reselection operation and releases the first RRC connection;

If the cell that the terminal reselects does not belong to the second station, or if the cell that the terminal reselects does not belong to the same cell group, the terminal is based on the reselection The cell performs RRC connection re-establishment.

An RRC connection re-establishment method, where a station currently attached to a terminal includes a first station and a second station, and the terminal maintains a first RRC connection with the first station, where the method includes: when the first When the RRC connection fails, the second station receives a report message that the first RRC connection fails to generate a radio link that is sent by the terminal;

Determining, by the second station, whether the terminal is allowed to perform a first RRC connection re-establishment, or determining whether the terminal is allowed to perform RRC connection re-establishment with the second station;

And the second station sends an indication message corresponding to the determination result to the terminal according to the determination result.

An RRC connection re-establishment method, where a station currently attached to a terminal includes a first station and a second station, and the terminal maintains a first RRC connection with the first station, where the method includes: when the first When the radio link fails to be generated by the RRC connection, the terminal determines whether the signal quality of the cell of the second station is lower than a preset threshold;

If not lower than a preset threshold, the terminal selects a cell of the second site as a target cell for RRC connection re-establishment;

The terminal performs an RRC connection re-establishment process to the target cell of the second station.

An RRC connection re-establishment method, where a station currently attached to a terminal includes a first station and a second station, and the terminal maintains a first RRC connection with the first station, where the method includes: when the first When the RRC connection fails to generate a radio link, the terminal determines whether the terminal and the second station are in synchronization,

If the terminal keeps synchronization with the second station, the terminal sends a report message or a RRC connection fast re-establishment request that the first RRC connection fails to generate a radio link to the second station; An RRC connection re-establishment message returned by the second station, where the RRC connection re-establishment message carries a parameter for reestablishing an RRC connection;

The terminal re-establishes a new RRC connection with the second station according to the parameter for reestablishing the RRC connection. An RRC connection re-established terminal, where the terminal currently attached to the terminal includes a first station and a second station, where the terminal maintains a first RRC connection with the first station, and the terminal and the second Maintaining a second RRC connection between the sites, where the terminal includes:

a cell reselection module, configured to perform cell reselection when a radio link failure occurs in the first RRC connection;

a first processing module, configured to: if the reselected cell belongs to the second station, or if the reselected cell and the second RRC connected cell belong to the same cell group, reselect another cell or stop cell reselection Operating and releasing the first RRC connection;

a second processing module, configured to: if the reselected cell does not belong to the second station, or if the reselected cell and the second RRC connected cell do not belong to the same cell group, perform, according to the reselected cell The RRC connection is re-established.

An RRC connection re-establishment site, where the site is a site to which the terminal is currently attached, and the site currently attached to the terminal further includes a first site, and the first RRC connection is maintained between the terminal and the first site. The site includes:

a receiving module, configured to receive, when the first RRC connection fails, a radio link failure report message that the first RRC connection is sent by the terminal;

a determining module, configured to determine whether the terminal is allowed to perform a first RRC connection re-establishment, or determine whether the terminal is allowed to perform RRC connection re-establishment with the station;

And a sending module, configured to send, according to the determination result, an indication message corresponding to the determination result to the terminal.

An RRC connection re-established terminal, where the terminal currently attached to the terminal includes a first station and a second station, and the terminal maintains a first RRC connection with the first station, where the terminal includes: a determining module, And determining, when the first RRC connection fails the radio link, whether the signal quality of the cell of the second station is lower than a preset threshold;

a selecting module, configured to: if the threshold is not lower than a preset threshold, the terminal selects a cell of the second site as a target cell that is reestablished by the RRC connection;

And a connection establishing module, configured to perform an RRC connection re-establishment process to the target cell of the second station.

An RRC connection re-established terminal, where the terminal currently attached to the terminal includes a first station and a second station, and the terminal maintains a first RRC connection with the first station, where the terminal includes: a determining module, configured to determine, when the first RRC connection fails to generate a radio link, whether the terminal and the second station are in synchronization,

a sending module, configured to send, to the second station, a report message that the first RRC connection fails to generate a radio link or an RRC connection fast re-establishment request if the terminal is synchronized with the second station;

a receiving module, configured to receive an RRC connection re-establishment message returned by the second station, where the RRC connection re-establishment message carries a parameter for reestablishing an RRC connection;

And a connection establishing module, configured to re-establish a new RRC connection with the second station according to the parameter of the reestablishing the RRC connection.

The beneficial effects brought by the technical solutions provided by the embodiments of the present invention are:

The RRC connection re-establishment scheme is maintained between the terminal and the different sites. When the connection between the terminal and a site fails, the terminal can re-establish the data service of the terminal through the RRC connection re-establishment process.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, 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 the present invention. For some embodiments, other drawings may be obtained from those skilled in the art without departing from the drawings.

1 is a flowchart of a method for RRC connection re-establishment provided in Embodiment 1 of the present invention; FIG. 2 is an information interaction diagram of RRC connection re-establishment provided in Embodiment 2 of the present invention; FIG. 3 is provided in Embodiment 3 of the present invention; FIG. 4 is a flowchart of an RRC connection re-establishment information provided in Embodiment 4 of the present invention; FIG. 5 is a flowchart of a method for re-establishing an RRC connection provided in Embodiment 5 of the present invention; 6 is a message interaction diagram of RRC connection re-establishment provided in Embodiment 6 of the present invention; FIG. 7 is a flowchart of a method for RRC connection re-establishment provided in Embodiment 7 of the present invention; FIG. 8 is provided in Embodiment 8 of the present invention; RRC connection re-establishment information interaction diagram; FIG. 9 is an RRC connection re-establishment information interaction diagram provided in Embodiment 9 of the present invention; FIG. 10 is a schematic structural diagram of a RRC connection re-establishment terminal provided in Embodiment 10 of the present invention; 11 is a schematic structural diagram of a RRC connection re-establishment station provided in Embodiment 11 of the present invention; FIG. 12 is a schematic structural diagram of a terminal for reestablishing an RRC connection according to Embodiment 12 of the present invention; FIG. 13 is a schematic structural diagram of a terminal for reestablishing an RRC connection according to Embodiment 13 of the present invention. detailed description

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

Example 1

Referring to FIG. 1, the embodiment provides a method for reestablishing an RRC connection. The station currently attached to the terminal includes a first station and a second station, and the first RRC connection is maintained between the terminal and the first station, and the terminal and the second station are maintained. Maintaining a second RRC connection, the method includes:

S11: When the radio link fails in the first RRC connection, the terminal performs cell reselection.

S12: If the cell that the terminal reselects belongs to the second station, or if the cell that the terminal reselects belongs to the same cell group, the terminal reselects another cell or the terminal stops the cell reselection operation and releases the first RRC connection;

S13: If the cell that the terminal reselects does not belong to the second station, or if the cell that the terminal reselects does not belong to the same cell group, the terminal performs RRC connection re-establishment based on the reselected cell.

The embodiment provides a RRC connection re-establishment scheme between the terminal and the different sites. When the connection between the terminal and a site fails, the terminal can ensure the data service of the terminal through the RRC connection re-establishment process. And if the cell that the terminal reselects belongs to the second station or the cell that is connected to the second RRC belongs to the same cell group, the terminal reselects another cell or the terminal stops the cell reselection operation, thereby facilitating reducing the RRC connection reestablishment delay.

In this embodiment, the first RRC connection may be based on the first cell, and the second RRC connection is connected to the second cell, so that the terminal implements carrier aggregation from the first station and the second station. A cell in the embodiment of the present invention can be regarded as a component carrier (CC, Component Carrier). The terminal may re-establish an RRC connection with the first station on the reselected cell, so that the terminal maintains a connection with both sites. Example 2

This embodiment is improved on the basis of Embodiment 1. Referring to FIG. 2, in the context of carrier aggregation between different sites, the RRC connection re-establishment scheme based on the dual RRC connection is as follows:

100: The station currently attached to the terminal includes a first station and a second station, and between the terminal and the first station, and between the terminal and the second station, respectively, maintaining two independent RRC connections.

In this embodiment, the RRC connection between the terminal and the first station is referred to as a first RRC connection, and the RRC connection between the terminal and the second station is referred to as a second RRC connection.

101: In the process of communication, a wireless link failure occurs in the first RRC connection between the terminal and the first station, that is, the terminal loses the first RRC connection between the terminal and the first station.

102: After the radio link fails in the first RRC connection between the terminal and the first station, the terminal performs cell reselection. The reselection may be for a first RRC connection where a failure has occurred.

102a: If the cell that the terminal reselects belongs to the second station, or the cell that the terminal reselects belongs to the same cell group (Cell Group), the terminal reselects another cell or the terminal stops the cell reselection operation. And then release the first RRC connection that failed the radio link.

Here, d, the block refers to a set of cells that can share the same timing advance.

This step is beneficial to reduce the RRC connection re-establishment delay.

102b: If the cell that the terminal reselects does not belong to the second station, or the cell that the terminal reselects does not belong to the same cell group (Cell Group), the terminal performs an RRC connection based on the reselected cell. Re-establish the process.

102b1: If the terminal performs the RRC connection re-establishment based on the reselected cell, the terminal continues the previous service.

102b2: If the terminal performs RRC connection re-establishment failure based on the reselected cell, the terminal actively releases the first RRC connection, and then sends a first RRC connection re-establishment failure event to the second station on the currently normal second RRC connection. Or a report message of the first RRC connection release event.

The terminal fails to perform the RRC connection re-establishment based on the reselected cell, and may be that the terminal fails to perform the RACH (Random Access Channel) process or the terminal receives the RRC connection re-establishment reject message.

After 102b2, optionally, this embodiment can also perform 103 and 104.

103: After receiving the report message sent by the terminal, the second station reports the first RRC connection re-establishment failure event or the first RRC connection release event to the first station. Specifically, the second station may forward the first RRC connection re-establishment failure event or the first RRC connection release event report message to the first station.

104: After receiving the first RRC connection re-establishment failure event or the first RRC connection release event reported by the second station, the first station releases the connection context information of the terminal.

The embodiment provides a RRC connection re-establishment scheme between the terminal and the different sites. When the connection between the terminal and a site fails, the terminal can ensure the data service of the terminal through the RRC connection re-establishment process. And if the cell that the terminal reselects belongs to the second station or the cell that is connected to the second RRC belongs to the same cell group, the terminal reselects another cell or the terminal stops the cell reselection operation, thereby facilitating reducing the RRC connection reestablishment delay. Example 3

Referring to FIG. 3, this embodiment provides a method for RRC connection re-establishment. The station currently attached to the terminal includes a first station and a second station, and the first RRC connection is maintained between the terminal and the first station, and the method includes:

S21: When the radio link fails in the first RRC connection, the second station receives a report message that the radio link failure occurs in the first RRC connection sent by the terminal.

S22: The second station determines whether the terminal is allowed to perform the first RRC connection re-establishment, or determines whether the terminal is allowed to perform the RRC connection re-establishment with the second station;

S23: The second station sends an indication message corresponding to the determination result to the terminal according to the determination result. The embodiment provides a RRC connection re-establishment scheme between the terminal and the different sites. When the connection between the terminal and a site fails, the terminal can ensure the data service of the terminal through the RRC connection re-establishment process. And determining, by the network side, whether the terminal is allowed to perform the first RRC connection re-establishment, preventing the terminal from blindly performing the first RRC connection re-establishment, and saving the time wasted by the blind RRC connection re-establishment failure, thereby facilitating reducing the RRC connection re-establishment delay. Example 4

This embodiment is improved on the basis of Embodiment 3.

Referring to FIG. 4, in the context of carrier aggregation between different sites, the RRC connection re-establishment scheme based on the dual RRC connection is as follows:

200: The station currently attached to the terminal includes a first station and a second station, and the terminal and the first station Between the terminal and the second station, two independent RRC connections are respectively maintained, and the two RRC connections may be based on different cells, so that carrier aggregation can be implemented.

201: In the process of communication, the first RRC connection between the terminal and the first station fails with a wireless link, that is, the terminal loses the first RRC connection between the terminal and the first station.

202: The terminal sends a report message that the first RRC connection fails to generate a radio link to the second station by using the currently normal second RRC connection.

Optionally, in the report message, the measurement result of the cell of the terminal under the first station may be carried. 203: After the second station receives the report message reported by the terminal, the second station determines whether the terminal is allowed to perform the first RRC connection re-establishment.

There are two specific methods for determining this step.

The first one is: The second station determines whether to allow the terminal to perform the first RRC connection re-establishment based on the measurement result of the cell in the first station reported by the terminal. If the second station allows the terminal to perform the first RRC connection re-establishment, the second station sends the first RRC re-establishment indication message to the terminal, where the terminal determined by the second station may perform the first The RRC connects to the information of the re-established cell.

The second type is: The second station asks the first station whether to allow the terminal to perform the first RRC connection re-establishment, and receives the inquiry result returned by the first station. Specifically, the second station sends a first RRC connection re-establishment negotiation message to the first station to report that the first RRC connection of the first station fails to generate a radio link. Further, the second station may simultaneously query the first station. Whether the terminal is allowed to perform the first RRC connection re-establishment. The first RRC connection re-establishment negotiation message may carry the measurement result of the cell of the terminal under the first station. Then, the first station sends a first RRC connection re-establishment negotiation acknowledgement message or a first RRC connection re-establishment reject message to the second station to notify the second station whether to allow the terminal to perform the first RRC connection re-establishment. The first RRC connection re-establishment acknowledgement message may include information about a cell that the terminal determines that the terminal can perform the first RRC connection re-establishment.

In this step, the network determines whether the terminal is allowed to perform the first RRC connection re-establishment, prevents the terminal from blindly performing the first RRC connection re-establishment, and saves the wasteful time of the blind RRC connection re-establishment failure, thereby facilitating reducing the RRC connection re-establishment delay. . After the second station determines whether the terminal is allowed to perform the first RRC connection re-establishment, if allowed, the second station sends a first RRC connection re-establishment indication message to the terminal by using the second RRC connection, to notify the terminal to perform the first RRC connection. Re-establishing, further, the indication information of the first RRC connection re-establishment may include information about a cell that is determined by the first station or determined by the second station to perform a first RRC connection re-establishment;

If not allowed, the second station sends a first RRC connection reestablishment indication message to the terminal through the second RRC connection to notify the terminal not to perform the first RRC connection re-establishment process. Further, after receiving the indication message that the first RRC connection re-establishment is prohibited, the terminal releases the current first RRC connection.

If the first determining method is adopted by the 203, that is, the second station autonomously determines whether the terminal is allowed to perform the first RRC connection re-establishment, after 204, optionally, the embodiment may further perform 205.

205: If the second station determines that the terminal is not allowed to perform the first RRC connection re-establishment, the second station sends a report message of the first RRC connection release to the first station, indicating that the first station releases the connection context information of the terminal.

The embodiment provides a RRC connection re-establishment scheme between the terminal and the different sites. When the connection between the terminal and a site fails, the terminal can ensure the data service of the terminal through the RRC connection re-establishment process. And determining, by the network side, whether the terminal is allowed to perform the first RRC connection re-establishment, preventing the terminal from blindly performing the first RRC connection re-establishment, and saving the time wasted by the blind RRC connection re-establishment failure, thereby facilitating reducing the RRC connection re-establishment delay. In this embodiment, if the second site allows the terminal to perform RRC connection re-establishment with the second station, the terminal may establish a connection to the second site, if the connection between the original terminal and the second site is called As a second RRC connection, the new RRC connection established between the terminal and the second station at this time may be referred to as a third RRC connection. Example 5

Referring to FIG. 5, this embodiment provides a method for reestablishing an RRC connection. The station currently attached to the terminal includes a first station and a second station, and the first RRC connection is maintained between the terminal and the first station. The method includes:

S31: When the radio link fails in the first RRC connection, the terminal determines whether the signal quality of the cell at the second station is lower than a preset threshold;

S32: If the preset threshold is not lower than (ie equal to or higher than), the terminal selects the second site. The cell is a target cell that is re-established as an RRC connection;

S33: The terminal performs an RRC connection re-establishment process to the target cell of the second station.

The embodiment provides a RRC connection re-establishment scheme between the terminal and the different sites. When the connection between the terminal and a site fails, the terminal can ensure the data service of the terminal through the RRC connection re-establishment process. If the terminal meets certain conditions, the cell reselection is performed. Otherwise, the cell of the second site or the cell of the non-RRC connected cell group is directly selected as the target cell of the RRC connection re-establishment, which saves the time for cell reselection, thereby facilitating the reduction of the RRC connection. Re-establish delay. Example 6

This embodiment is improved on the basis of Embodiment 5.

Referring to Figure 6, in the context of carrier aggregation between different sites, the RRC connection re-establishment scheme based on a single RRC connection is as follows:

300: The station currently attached to the terminal includes a first station and a second station, and the terminal maintains an RRC connection with the first station.

In this embodiment, the RRC connection between the terminal and the first station is referred to as a first RRC connection, and the cell that maintains the RRC connection under the first site is referred to as an RRC connected cell group, and the second site to which the terminal is currently attached is placed. A cell that does not maintain an RRC connection is referred to as a non-RRC connected cell group.

301: In the process of communication, the first RRC connection between the terminal and the first station fails with a wireless link, that is, the terminal loses the first RRC connection between the terminal and the first station.

302: The terminal performs cell reselection.

Further, a threshold value for performing cell reselection by one terminal is preset; if the signal quality of the cell at the second site currently attached by the terminal is lower than the threshold, or if the non-RRC connected cell group or the non-RRC connected cell group If the signal quality of the intra-cell is lower than the threshold, the terminal performs the cell reselection operation; otherwise, if the quality of the cell under the second site to which the terminal is currently attached is equal to or higher than the threshold, or if the non-RRC connection If the signal quality of the cell in the cell group or the non-RRC connected cell group is equal to or higher than the threshold, the terminal directly selects the cell of the second site or the cell of the non-RRC connected cell group as the target cell of the RRC connection reestablishment, instead of Perform a cell reselection process.

In this step, the terminal performs the cell reselection only after the condition is met. Otherwise, the cell of the second site or the cell of the non-RRC connected cell group is directly selected as the target cell of the RRC connection re-establishment, and the cell reselection process is not performed, thereby saving the cell weight. The selected time, which is beneficial to reduce the RRC connection re-establishment Delay.

303: The terminal performs an RRC connection re-establishment process to the target cell of the second site, where the method includes: 303a: the terminal sends a random access preamble to the second station.

303b: The second station sends a random access response message to the terminal.

303c: The terminal sends an RRC connection re-establishment request message to the second station.

303d: The second station sends a contention resolution message to the terminal.

303e: The second station sends an RRC connection re-establishment message to the terminal, where the message carries parameters required for the terminal to establish a new RRC connection.

During the terminal performing the RRC connection re-establishment process, the second station may send an indication to the terminal that the signal quality of the cell in which the radio link failed to occur or the signal quality of the cell in the first station where the radio link fails occurs. Specifically, the second station may indicate the signal quality in a random access response message, a contention resolution message, or an RRC connection re-establishment message.

304: The terminal reports, according to the indication, the signal quality of the cell in which the radio link fails, or the signal quality of the cell in the first station where the radio link fails.

The signal quality of the cell may be a non-periodic CQI (Channel Quality Indicator) value, or RSRP (Reference Signal Receiving Power), RSRQ (Reference Signal Receiving Quality), and the like.

305: After the second station receives the signal quality of the cell sent by the terminal, the second station determines whether to let the terminal continue to use or release the cells.

Specifically, the second station may determine, according to the signal quality of the cell reported by the terminal, that when the terminal uses the cell, send a cell configuration or an activation command to the terminal, instructing the terminal to use the cell; Or when the second station determines that the terminal releases the cell, sending a cell removal or deactivation command to the terminal, instructing the terminal to release the cell.

306: Optionally, after the terminal performs the RRC connection re-establishment, the second station sends, to the first station, indication information that the RRC connection of the terminal is changed, used to notify the first station, and subsequently needs to send the terminal to the terminal by using the second station. RRC control message.

The embodiment provides a RRC connection re-establishment scheme between the terminal and the different sites. When the connection between the terminal and a site fails, the terminal can ensure the data service of the terminal through the RRC connection re-establishment process. And the terminal satisfies certain conditions to perform cell reselection, otherwise directly selects the second site. The cell of the cell or the non-RRC connected cell group serves as the target cell for reestablishment of the RRC connection, which saves the time for cell reselection, thereby facilitating the reduction of the RRC connection reestablishment delay. Example 7

Referring to FIG. 7, the embodiment provides a method for reestablishing an RRC connection. The station currently attached to the terminal includes a first station and a second station, and the first RRC connection is maintained between the terminal and the first station. The method includes:

S41: When the radio link fails in the first RRC connection, the terminal determines whether the terminal and the second station are in synchronization,

S42: If the terminal keeps synchronization with the second station, the terminal sends a first RRC connection to the second station to generate a radio link failure report message or an RRC connection fast re-establishment request;

S43: The terminal receives an RRC connection re-establishment message returned by the second station, where the RRC connection re-establishment message carries a parameter for reestablishing the RRC connection;

S44: The terminal re-establishes a new RRC connection with the second station according to the parameter for reestablishing the RRC connection.

The embodiment provides a RRC connection re-establishment scheme between the terminal and the different sites. When the connection between the terminal and a site fails, the terminal can ensure the data service of the terminal through the RRC connection re-establishment process. And in the case that the terminal is synchronized with the second station, the RRC connection re-establishment without the random access procedure is performed, thereby facilitating the reduction of the RRC connection re-establishment delay. Example 8

Referring to Figure 8, in the context of carrier aggregation between different sites, the RRC connection re-establishment scheme based on a single RRC connection is as follows:

400: The station currently attached to the terminal includes a first station and a second station, and the terminal maintains an RRC connection with the first station.

In this embodiment, the RRC connection between the terminal and the first station is referred to as a first RRC connection. The RRC-connected cell under the first site is referred to as an RRC-connected cell group, and the un-allocated RRC-connected cell at the second site to which the terminal is currently attached is referred to as a non-RRC-connected cell group.

401: In the process of communication, a radio link failure occurs in the RRC connection between the terminal and the first station, that is, the terminal loses the RRC connection between the terminal and the first station. 402: After the first RRC connection between the terminal and the first station fails, the terminal determines whether the terminal keeps synchronization with the second station. If the terminal determines that the current station is synchronized with the second station, the terminal determines that the terminal does not perform random connection. The RRC connection of the incoming process is re-established.

In this case, when the terminal and the second station are synchronized, the RRC connection re-establishment without the random access procedure is performed, thereby facilitating the reduction of the RRC connection re-establishment delay.

After 402, execute 403a or 403b.

403a: After determining that the RRC connection re-establishment without the random access procedure can be performed, the terminal sends a report message that the first RRC connection fails to generate a radio link to the second station by using the physical uplink control channel (PUCCH channel) to notify the The first RRC connection of the second station fails to generate a radio link, or the RRC connection fast re-establishment request information is sent to notify the second station to quickly establish a new RRC connection.

403b: The terminal determines whether there is a valid uplink grant (Up Link Grant) on the second site. 403bl: If there is no valid uplink grant, the terminal sends an SR (Scheduling Request) to the second station by using a PUCCH (Physical Uplink Control Channel) channel, and the second station allocates an uplink grant to the terminal and sends the uplink grant to the terminal. The terminal, by using the allocated uplink grant, sends an RRC connection fast re-establishment request message to the second station or a report message that the first RRC connection fails to generate a radio link.

The RRC connection fast re-establishment request message or the report message that the radio link failure occurs in the first RRC connection may reuse the existing RRC connection re-establishment request message. Optionally, the RRC connection fast re-establishment request message or the first RRC connection occurrence radio link failure report message may also be a physical layer signaling, a MAC CE (MAC Control Element, MAC Control Element or MAC Control Signaling) or RRC message.

403b2: If there is a valid uplink grant, the terminal sends a RRC Connection Fast Re-establishment Request message to the second station by using the currently valid uplink grant or a report message that the radio link failure occurs in the first RRC connection.

Here, the priority of the RRC connection fast re-establishment request message or the first RRC connection occurrence radio link failure report message may be set to be the highest, so that in the case that there is a valid uplink grant, the terminal may preferentially utilize the current valid. The uplink grants a report message that the RRC connection fast re-establishment request message is sent to the second station or the first RRC connection fails.

404: The second station receives the report that the first RRC connection fails to generate a radio link. After the message "or" RRC connection fast re-establishment request message", the second station establishes a new RRC connection for the terminal, and sends an RRC connection re-establishment message to the terminal, the message containing parameters required for the terminal to re-establish the RRC connection.

Optionally, the second station may carry, in the RRC connection re-establishment message, an indication of the signal quality of the cell in which the radio link failure occurs or the signal quality of the cell in the first station where the radio link fails. The signal quality of the cell may be an aperiodic CQI value, RSRP, or RSRQ.

405: After receiving the RRC connection re-establishment message sent by the second station, the terminal establishes a new RRC connection with the second station according to the parameter required to re-establish the RRC connection in the message.

Optionally, the terminal reports, according to the indication, the signal quality of the cell in which the radio link fails, or the signal quality of the cell in the first station where the radio link fails, to the second station. After receiving the signal quality of the cell, the second station determines whether to let the terminal continue to use or release the cells according to the signal quality of the cell reported by the terminal, and when it is determined that the terminal uses the cell, send the terminal to the terminal. a cell configuration or an activation command, instructing the terminal to use the cell, or when the second station determines that the terminal releases the cell, sending a cell removal or deactivation command to the terminal, instructing the terminal to release the Said cell.

406: Optionally, after the terminal performs the RRC connection re-establishment, the second station sends, to the first station, indication information that the RRC connection of the terminal changes, used to notify the first station, and subsequently needs to send the terminal to the terminal by using the second station. RRC control message.

The embodiment provides a RRC connection re-establishment scheme between the terminal and the different sites. When the connection between the terminal and a site fails, the terminal can ensure the data service of the terminal through the RRC connection re-establishment process. And in the case that the terminal is synchronized with the second station, the RRC connection re-establishment without the random access procedure is performed, thereby facilitating the reduction of the RRC connection re-establishment delay. Example 9

This embodiment is improved on the basis of Embodiment 3.

Referring to Figure 9, in the context of carrier aggregation between different sites, the RRC connection re-establishment scheme based on single RRC connection is as follows:

500: The station currently attached to the terminal includes a first station and a second station, and the terminal maintains an RRC connection with the first station. In this embodiment, the RRC connection between the terminal and the first station is referred to as a first RRC connection. The cell that maintains the RRC connection under the first site is referred to as an RRC connected cell group, and the un-allocated RRC connected cell under the second site to which the terminal is currently attached is referred to as a non-RRC connected cell group.

501: In the process of communication, a radio link failure occurs in the RRC connection between the terminal and the first station, that is, the terminal loses the RRC connection between the terminal and the first station.

502: After the radio link failure occurs in the first RRC connection between the terminal and the first station, the terminal determines whether the terminal and the second station are in synchronization, and if the terminal determines that the current station is synchronized with the second station, performing 503a or 503b.

503a: The terminal sends a report message that the first RRC connection fails the wireless link to the second station by using the PUCCH channel, and notifies the current first RRC connection of the second station that the radio link fails.

503b: The terminal determines whether there is a valid uplink grant (Up Link Grant) on the second site. 503bl: If there is no valid uplink grant, the terminal uses PUCCH (Physical Uplink)

The control channel, the physical uplink control channel, the channel sends an SR (Scheduling Request) to the second station, and the second station grants the uplink to the terminal, and the terminal sends the first to the second station by using the allocated uplink grant. The RRC connection generates a report message that the radio link fails.

503b2: If there is a valid uplink grant, the terminal sends a report message that the first RRC connection fails to the radio link to the second station by using the currently valid uplink grant.

Here, the sending priority of the report message that the first RRC connection fails the radio link may be set to the highest, so that in the case that there is a valid uplink grant, the terminal may preferentially send the first to the second station by using the currently valid uplink grant. An RRC connection generates a report message that the radio link fails.

504: After the second station receives the report message reported by the terminal, the second station determines whether the terminal is allowed to perform the first RRC connection re-establishment or the second station determines whether the terminal is allowed to perform the RRC connection re-establishment with the second station.

There are two specific methods for determining this step.

The first type is: the second station determines whether to allow the terminal to perform the first RRC connection re-establishment or the second station determines whether to allow the terminal to establish a new one with the second station, based on the measurement result of the cell under the first station reported by the terminal. RRC connection.

The second type is: the second station asks the first station whether to allow the terminal to perform the first RRC connection. Establish, and receive the result of the inquiry returned by the first site. Specifically, the second station sends a first RRC connection re-establishment negotiation message to the first station to report that the first RRC connection fails to generate a radio link. Further, the second station simultaneously asks the first station whether to allow the terminal to execute. The first RRC connection is re-established. The sending, by the second station, the first RRC connection re-establishment negotiation message to the first station may carry the measurement result of the cell of the terminal under the first station. The first station then feeds back the first RRC connection re-establishment negotiation acknowledgement message or the first RRC connection re-establishment reject message to the second station to notify the second station whether to allow the terminal to perform the first RRC connection re-establishment. The first RRC connection re-establishment acknowledgement message may include information about a cell that the terminal determines that the terminal can perform the first RRC connection re-establishment. In addition, in the method, the second station may also determine whether to allow the UE to perform RRC connection re-establishment with the second station if the first station rejects the first RRC connection re-establishment. The specific determination method can be the same as in the first method.

In this step, the network determines whether the terminal is allowed to perform the first RRC connection re-establishment or whether to perform the RRC connection re-establishment with the second station, preventing the terminal from blindly performing the RRC connection re-establishment, and saving the waste of the blind RRC connection re-establishment failure. Time, which is beneficial to reduce the RRC connection re-establishment delay.

505: The second station determines whether the terminal is allowed to perform the first RRC connection re-establishment or determines whether the terminal is allowed to perform the RRC connection re-establishment with the second station,

505a. If the terminal is allowed to perform the first RRC connection re-establishment, the second station sends a first RRC connection re-establishment indication message to the terminal to notify the terminal to perform the first RRC connection re-establishment. Further, the indication message that the second station sends the first RRC connection re-establishment to the terminal may include that the terminal determined by the first station or determined by the second station may perform the first RRC connection Information about the established cell.

505b. If the terminal is allowed to perform RRC connection re-establishment with the second station, the second station sends an RRC connection re-establishment indication message to the terminal to notify the terminal to perform RRC connection re-establishment with the second station. Further, the sending, by the second station, the RRC connection re-establishment indication message to the terminal may include information about a cell that the terminal determines that the terminal can perform RRC connection re-establishment with the second station.

505c, if it is determined that the terminal is not allowed to perform the first RRC connection re-establishment, the second station sends a first RRC connection re-establishment prohibition indication message to the terminal, to notify the terminal not to perform the first The RRC connection re-establishment process. Further, after receiving the indication message that the first RRC connection re-establishment is prohibited, the terminal releases the current first RRC connection. Or if it is determined that the terminal is not allowed to perform the first RRC connection re-establishment and determines that the terminal is not allowed to perform the RRC connection re-establishment with the second station, the second station sends an indication message of the RRC connection re-establishment prohibition to the terminal, to The terminal is notified not to perform the RRC connection re-establishment process. Further, after receiving the indication message of the RRC connection re-establishment inhibition, the terminal releases the current first RRC connection.

If the first determination method adopted by the 504 is that the second station autonomously determines whether the terminal is allowed to perform the first RRC connection re-establishment, the embodiment may also perform 506.

506: If the second station determines that the terminal is not allowed to perform the first RRC connection re-establishment, the second station sends a report message of the first RRC connection release to the first station, instructing the first station to release the connection context information of the terminal.

The embodiment provides a RRC connection re-establishment scheme between the terminal and the different sites. When the connection between the terminal and a site fails, the terminal can ensure the data service of the terminal through the RRC connection re-establishment process. And determining, by the network side, whether the terminal is allowed to perform the first RRC connection re-establishment or whether to perform the RRC connection re-establishment with the second station, preventing the terminal from blindly performing the RRC connection re-establishment, and saving the waste of the blind RRC connection re-establishment failure. Therefore, it is advantageous to reduce the RRC connection re-establishment delay. Example 10

Referring to FIG. 10, the embodiment provides a RRC connection re-establishment terminal. The station currently attached to the terminal includes a first station and a second station, and the first RRC connection is maintained between the terminal and the first station, and the terminal and the second station are maintained. Maintaining a second RRC connection, the terminal includes:

a cell reselection module 601, configured to perform cell reselection when a radio link failure occurs in the first RRC connection;

The first processing module 602 is configured to: if the reselected cell belongs to the second station, or if the reselected cell belongs to the same cell group as the second RRC connected cell, reselect another cell or stop the cell reselection operation and release First RRC connection;

The second processing module 603 is configured to perform RRC connection re-establishment based on the reselected cell if the reselected cell does not belong to the second station, or if the reselected cell does not belong to the same cell group. The terminal further includes a reporting module, after executing the second processing module,

If the terminal fails to perform the RRC connection re-establishment with the reselected cell, the terminal sends a first RRC connection re-establishment failure event or a first RRC connection release event report message to the second station on the second RRC connection.

The embodiment provides a RRC connection re-establishment scheme between the terminal and the different sites. When the connection between the terminal and a site fails, the terminal can ensure the data service of the terminal through the RRC connection re-establishment process. And if the cell that the terminal reselects belongs to the second station or the cell that is connected to the second RRC belongs to the same cell group, the terminal reselects another cell or the terminal stops the cell reselection operation, thereby facilitating reducing the RRC connection reestablishment delay. Example 11

Referring to FIG. 11, the embodiment provides a RRC connection re-establishment site, where the site is a site to which the terminal is currently attached, and the site currently attached by the terminal further includes a first site, and the first RRC connection is maintained between the terminal and the first site. Sites include:

The receiving module 701 is configured to: when the first RRC connection fails to generate a radio link, the first RRC connection sent by the receiving terminal fails to generate a radio link failure report message;

The determining module 702 is configured to determine whether the terminal is allowed to perform the first RRC connection re-establishment, or determine whether the terminal is allowed to perform the RRC connection re-establishment with the station;

The sending module 703 is configured to send, according to the determination result, an indication message corresponding to the determination result to the terminal.

The determining module 704 is specifically configured to: if the terminal has a second RRC connection with the station, determine whether to allow the terminal to perform the first RRC connection re-establishment; if there is no second RRC connection between the terminal and the station, determine whether to allow the terminal to perform the first The RRC connection is re-established, or it is determined whether the terminal is allowed to perform RRC connection re-establishment with the station.

If the terminal has a second RRC connection with the second station, the sending module is specifically configured to: if the terminal is allowed to perform the first RRC connection re-establishment, send the first RRC connection re-establishment indication message to the terminal by using the second RRC connection, to Notifying the terminal to perform the first RRC connection re-establishment; if the terminal is not allowed to perform the first RRC connection re-establishment, sending the first RRC connection re-establishment prohibition indication message to the terminal through the second RRC connection, to notify the terminal not to perform the first RRC connection Re-established.

If there is no second RRC connection between the terminal and the second station, the sending module is specifically used for If the terminal is allowed to perform the first RRC connection re-establishment, the second station sends a first RRC connection re-establishment indication message to the terminal to notify the terminal to perform the first RRC connection re-establishment; if the terminal is allowed to perform the RRC with the second station The connection re-establishment, the second station sends an indication message of the RRC connection re-establishment to the terminal, to notify the terminal to perform RRC connection re-establishment with the second station; or if the terminal is not allowed to perform the first RRC connection re-establishment, the second station Sending a first RRC connection re-establishment prohibition indication message to the terminal to notify the terminal not to perform the first RRC connection re-establishment; or if the terminal is not allowed to perform the first RRC connection re-establishment, and the terminal is not allowed to perform the second station The RRC connection is re-established, and the second station sends an indication message of the RRC connection re-establishment prohibition to the terminal to notify the terminal not to perform the RRC connection re-establishment.

The indication message of the first RRC connection re-establishment includes information of the cell determined by the first station or the station determined by the station may perform the first RRC connection re-establishment;

The indication message of the RRC connection re-establishment includes information of a cell that the station determined by the station can perform re-establishment with the station performing the RRC connection.

Determining module, specifically for

Determining whether to allow the terminal to perform the first RRC connection re-establishment or determining whether to allow the terminal to establish a new RRC connection with the second station based on the measurement result of the cell in the first station reported by the terminal; or sending the first RRC to the first station The connection re-establishment negotiation message reports that the first RRC connection of the first station fails to occur.

The first RRC connection re-establishment negotiation message carries the measurement result of the cell of the terminal under the first station.

The receiving module is further configured to send a first RRC connection re-establishment negotiation message to the first station, to report whether the first station returns the first RRC connection, and the first station returns whether to allow the terminal to perform the first RRC connection. Re-established result information.

The receiving module is further configured to send, by the first station, a first RRC connection re-establishment negotiation message, to report that the first station first RRC connection fails to generate a radio link,

And if the first station allows the terminal to perform the first RRC connection re-establishment, receiving the first RRC connection re-establishment negotiation acknowledgement message sent by the first station, where the acknowledgement message includes the cell that the first station determines that the terminal can perform the first RRC connection re-establishment Information; or

If the first station does not allow the terminal to perform the first RRC connection re-establishment, the first RRC connection re-establishment rejection message sent by the first station is received. Send module, also used

If the station does not allow the terminal to perform the first RRC connection re-establishment, the first RRC connection release indication message is sent to the first station, so that the first station releases the connection context information of the terminal.

The indication message is a physical downlink control signaling PDCCH, a MAC CE, or a radio resource control RRC message.

The embodiment provides a RRC connection re-establishment scheme between the terminal and the different sites. When the connection between the terminal and a site fails, the terminal can ensure the data service of the terminal through the RRC connection re-establishment process. And determining, by the network side station, whether the terminal is allowed to perform the first RRC connection re-establishment, preventing the terminal from blindly performing the first RRC connection re-establishment, and saving the time wasted by the blind RRC connection re-establishment failure, thereby facilitating reducing the RRC connection re-establishment delay. . Example 12

Referring to FIG. 12, the embodiment provides a RRC connection re-establishment terminal. The station currently attached to the terminal includes a first station and a second station, and the terminal maintains a first RRC connection with the first station, where the terminal includes:

The determining module 801 is configured to determine, when the radio link fails in the first RRC connection, whether the signal quality of the cell of the second station is lower than a preset threshold;

The selecting module 802 is configured to: if the threshold is equal to or higher than the preset threshold, the terminal selects the cell of the second site as the target cell of the RRC connection re-establishment;

The connection establishing module 803 is configured to perform an RRC connection re-establishment process to the target cell of the second station.

The terminal also includes:

a receiving module, configured to receive, during an RRC connection re-establishment process, an indication sent by the second station to report a signal quality of a cell that fails to generate a radio link or a signal quality of a cell under the first station where a radio link fails;

The reporting module is configured to report, according to the indication, the signal quality of the cell in which the radio link fails or the signal quality of the cell in the first station where the radio link fails.

The embodiment provides a RRC connection re-establishment scheme between the terminal and the different sites. When the connection between the terminal and a site fails, the terminal can ensure the data service of the terminal through the RRC connection re-establishment process. And the terminal satisfies certain conditions to perform cell reselection, otherwise directly selects the second site. The cell of the cell or the non-RRC connected cell group serves as the target cell for reestablishment of the RRC connection, which saves the time for cell reselection, thereby facilitating the reduction of the RRC connection reestablishment delay. Example 13

Referring to FIG. 13, the embodiment provides a RRC connection re-establishment terminal. The station currently attached to the terminal includes a first station and a second station, and the terminal maintains a first RRC connection with the first station, where the terminal includes:

The determining module 901 is configured to determine, when the radio link fails in the first RRC connection, whether the terminal and the second station are in synchronization,

The sending module 902 is configured to send the first to the second station if the terminal is synchronized with the second station.

The RRC connection generates a radio link failure report message or an RRC connection fast re-establishment request; the receiving module 903 is configured to receive an RRC connection re-establishment message returned by the second station, where the RRC connection re-establishment message carries a parameter for reestablishing the RRC connection;

The connection establishing module 904 is configured to re-establish a new RRC connection with the second station according to the parameter for reestablishing the RRC connection.

Sending module, specifically for

The physical uplink control channel PUCCH channel is used to send a report message to the second station that the first RRC connection fails the radio link or the RRC connection fast re-establishment request.

Sending module, specifically for

Determining whether there is a valid uplink grant between the terminal and the second site;

If there is no valid uplink grant, sending a scheduling request to the second station, and receiving the uplink grant allocated by the second station, using the allocated uplink grant to send the first RRC connection to the second station to generate a radio link failure report message or an RRC connection Quickly re-establish the request;

If there is a valid uplink grant, a valid uplink grant is used to send a first RRC connection to the second station to generate a radio link failure report message or an RRC connection fast re-establishment request.

The RRC connection re-establishment message carries the indication information indicating the signal quality of the cell in which the radio link fails to occur or the indication information of the signal quality of the cell in the first station where the radio link fails. The terminal further includes a reporting module, configured to perform the receiving After the module, according to the indication, the signal quality of the cell in which the radio link fails or the signal quality of the cell in the first station where the radio link fails occurs is reported to the second station. The embodiment provides a RRC connection re-establishment scheme between the terminal and the different sites. When the connection between the terminal and a site fails, the terminal can ensure the data service of the terminal through the RRC connection re-establishment process. And in the case that the terminal is synchronized with the second station, the RRC connection re-establishment without the random access procedure is performed, thereby facilitating reducing the RRC connection re-establishment delay.

In the foregoing embodiments, multiple sites establish an RRC connection with the terminal, and each RRC connection may be based on different cells, thereby implementing carrier aggregation between the sites. A plurality of stations for implementing carrier aggregation may be base stations or home base stations, and the like. For example, one of the sites may be a macro base station, and the other site is a home base station; or one site is a base station and the other site is a relay station, which is not limited in this embodiment. When a terminal is attached to a site, it can work by connecting to the site. The terminal may have an RRC connection with the attached site, but such a connection may sometimes fail. When such a connection fails, the method or device of the embodiment of the present invention may be used to implement reconnection to improve service performance. The terminal may include, but is not limited to, a user equipment (UE) of various forms, such as a mobile phone and a computer. The specific embodiment is not limited in this embodiment.

All or part of the technical solutions provided by the above embodiments may be implemented by software programming, and the software program is stored in a readable storage medium such as a hard disk, a optical disk or a floppy disk in a computer.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., which are within the spirit and scope of the present invention, should be included in the protection of the present invention. Within the scope.

Claims

Rights request

A radio resource control RRC connection re-establishment method, where a station currently attached to a terminal includes a first station and a second station, and the terminal maintains a first RRC connection with the first station, where the terminal and the Maintaining a second RRC connection between the second sites, where the method includes: when the first RRC connection fails to generate a radio link, the terminal performs cell reselection; if the terminal reselects The cell belongs to the second station, or if the cell that is reselected by the terminal and the cell that is connected to the second RRC belong to the same cell group, the terminal reselects another cell or the terminal stops the cell reselection operation. Release the first RRC connection;

The method according to claim 1, wherein after the terminal performs RRC connection re-establishment based on the reselected cell, the method includes:

If the terminal fails to perform RRC connection re-establishment with the reselected cell, the terminal sends a first RRC connection re-establishment failure event or a first RRC connection release to the second station on the second RRC connection. Report message for the event.

The method according to claim 2, wherein the sending, by the second RRC connection, a report message of a first RRC connection re-establishment failure event or a first RRC connection release event to the second station After that, including:

The second station reports a first RRC connection re-establishment failure event or a first RRC connection release event to the first station to notify the first station to release connection context information of the terminal.

A radio resource control RRC connection re-establishment method, where a station currently attached to a terminal includes a first station and a second station, and the terminal maintains a first RRC connection with the first station, where The methods include:

When the first RRC connection fails to generate a radio link, the second station receives a report message that the first RRC connection fails to generate a radio link that is sent by the terminal;

Sending, by the second station, an indication corresponding to the determination result to the terminal according to the determination result Message.

The method according to claim 4, wherein the second station determines whether the terminal is allowed to perform a first RRC connection re-establishment, or determines whether the terminal is allowed to perform execution with the second station. The RRC connection is re-established, including:

If the terminal has a second RRC connection with the second station, the second station determines whether the terminal is allowed to perform the first RRC connection re-establishment; or

If there is no second RRC connection between the terminal and the second station, the second station determines whether the terminal is allowed to perform the first RRC connection re-establishment, or determines whether the terminal is allowed to perform the second The RRC connection between the sites is re-established.

6. The method according to claim 5, wherein if there is a second RRC connection between the terminal and the second station,

And sending, by the second station, an indication message corresponding to the determination result to the terminal according to the determination result, including:

If the terminal is allowed to perform the first RRC connection re-establishment, the second station sends an indication message of the first RRC connection re-establishment to the terminal by using the second RRC connection, to notify the terminal to perform the first RRC connection. Re-establish; or

If the terminal is not allowed to perform the first RRC connection re-establishment, the second station sends a first RRC connection re-establishment prohibition indication message to the terminal by using the second RRC connection, to notify the terminal not to perform the first An RRC connection is re-established.

7. The method according to claim 5, wherein if there is no second RRC connection between the terminal and the second station,

If the terminal is allowed to perform the first RRC connection re-establishment, the second station sends a first RRC connection re-establishment indication message to the terminal to notify the terminal to perform the first RRC connection re-establishment; or

If the terminal is allowed to perform RRC connection re-establishment with the second station, the second station sends an indication message of RRC connection re-establishment to the terminal, to notify the terminal to perform execution with the second station. RRC connection re-establishment; or

If the terminal is not allowed to perform the first RRC connection re-establishment, the second station is to the end Sending, by the terminal, an indication message that the first RRC connection re-establishment is prohibited, to notify the terminal that the first RRC connection re-establishment is not performed; or

If the terminal is not allowed to perform the first RRC connection re-establishment, and the terminal is not allowed to perform RRC connection re-establishment with the second station, the second station sends an RRC connection re-establishment prohibition to the terminal. An indication message to notify the terminal not to perform RRC connection re-establishment.

8. Method according to claim 6 or 7, characterized in that

The first RRC connection re-establishment indication message includes information that is determined by the first station or determined by the second station, where the terminal may perform a first RRC connection re-establishment; or the RRC connection re-establishment The indication message includes information that the terminal determined by the second station can perform RRC connection re-establishment with the second station.

The second station determines whether to allow the terminal to perform the first RRC connection re-establishment or the second station determines whether to allow the terminal to establish a new relationship with the second station, based on the measurement result of the cell under the first station reported by the terminal. RRC connection;

Or the second station sends a first RRC connection re-establishment negotiation message to the first station to report that the first RRC connection of the first station fails to generate a radio link.

The method according to claim 9, wherein the first RRC connection reestablishment negotiation message carries a measurement result of a cell of the terminal under the first station.

The method according to claim 9, wherein the second station sends a first RRC connection re-establishment negotiation message to the first station to report that the first station first RRC connection occurs a wireless chain. After the road fails, it includes:

And the second station receives, by the first station, whether the terminal is allowed to perform result information of the first RRC connection re-establishment.

The method according to claim 11, wherein the second station receives, by the first station, whether the terminal is allowed to perform the first RRC connection re-establishment result information, including:

If the first station allows the terminal to perform the first RRC connection re-establishment, the second station receives the first RRC connection re-establishment negotiation confirmation message sent by the first station, and the acknowledgement disappears. The information including the information that the terminal determined by the first station can perform the first RRC connection re-establishment; or

And if the first station does not allow the terminal to perform the first RRC connection re-establishment, the second station receives the first RRC connection re-establishment rejection message sent by the first station.

The method according to claim 4, wherein, after determining, by the second station, whether the terminal is allowed to perform the first RRC connection re-establishment, the method includes:

If the second station does not allow the terminal to perform the first RRC connection re-establishment, the second station sends an indication message of the first RRC connection release to the first station, to notify the first station to release the Connection context information for the terminal.

The method according to claim 4, wherein the indication message is a physical downlink control signaling PDCCH, a medium access control MAC control element CE, or a radio resource control RRC message.

A radio resource control RRC connection re-establishment method, where a terminal currently attached by a terminal includes a first station and a second station, and the terminal maintains a first RRC connection with the first station, where The methods include:

When the first RRC connection fails to generate a radio link, the terminal determines whether the signal quality of the cell of the second station is lower than a preset threshold;

The method according to claim 15, wherein the method further comprises: in the RRC connection re-establishment process, the terminal receiving the wireless link failure of the uplink sent by the second station An indication of the signal quality of the cell or the signal quality of the cell at the first station where the radio link failed;

The terminal according to the indication, to the second station, the signal quality of the cell in which the radio link fails or the signal quality of the cell in the first station where the radio link fails.

The method according to claim 16, wherein the terminal reports, to the second station, a signal quality of a cell in which a radio link fails or a radio link failure occurs according to the indication. After the signal quality of the cell under a station, including: When the second station determines, according to the signal quality of the cell reported by the terminal, that the terminal uses the cell, sends a cell configuration or an activation command to the terminal, instructing the terminal to use the cell, or determining When the terminal releases the cell, the terminal sends a cell removal or deactivation command to the terminal, instructing the terminal to release the cell.

The method according to claim 15, wherein after the terminal performs an RRC connection re-establishment process to the target cell of the second site, the method includes:

After the terminal performs the RRC connection re-establishment, the second station sends, to the first station, indication information that the RRC connection of the terminal is changed, to notify the first station to pass the second site. Sending an RRC Control message to the terminal.

A radio resource control RRC connection re-establishment method, where a terminal currently attached to a terminal includes a first station and a second station, and the terminal maintains a first RRC connection with the first station, where The methods include:

When the first RRC connection fails to generate a radio link, the terminal determines whether the terminal and the second station are in synchronization,

The terminal re-establishes a new with the second site according to the parameter of the reestablishing the RRC connection.

RRC connection.

The method according to claim 19, wherein the sending, by the terminal, the first RRC connection occurrence radio link failure report message or the RRC connection fast re-establishment request to the second station, includes:

The terminal sends a first to the second station by using a physical uplink control channel PUCCH channel.

The RRC connection generates a radio link failure report message or an RRC connection fast re-establishment request.

The method according to claim 19, wherein the sending, by the terminal, the first RRC connection radio link failure report message or the RRC connection fast re-establishment request to the second station, includes:

Determining, by the terminal, whether there is a valid uplink grant between the terminal and the second station; If there is no valid uplink grant, the terminal sends a scheduling request to the second station, and receives an uplink grant allocated by the second station, and sends a first RRC connection to the second station by using the allocated uplink grant. A report message of a radio link failure or an RRC connection fast re-establishment request occurs;

If there is a valid uplink grant, the terminal uses the valid uplink grant to send a report message to the second station that the first RRC connection fails the radio link or the RRC connection fast reestablishment request.

The method according to claim 19, wherein the RRC connection re-establishment message carries indication information indicating a signal quality of a cell in which a radio link failure occurs or a failure occurs in the first station where a radio link fails. Indication information of the signal quality of the cell;

After the terminal receives the RRC connection re-establishment message returned by the second station, the method includes: the terminal reporting, according to the indication, the signal quality of the cell that fails the radio link or the radio link occurs to the second station. The signal quality of the cell under the first station that failed.

The method according to claim 19, after the terminal re-establishes a new RRC connection with the second station according to the parameters required for reestablishing the RRC connection, the method includes: Sending, to the first station, indication information that the RRC connection of the terminal is changed, to notify the first station to send an RRC control message to the terminal by using the second station.

A radio resource control RRC connection re-establishment terminal, where the terminal currently attached to the terminal includes a first station and a second station, and the terminal maintains a first RRC connection with the first station, where the terminal Maintaining a second RRC connection with the second site, where the terminal includes:

a second processing module, configured to: if the reselected cell does not belong to the second station, or if the reselected cell and the second RRC connected cell do not belong to the same cell group, based on the reselection The area performs RRC connection re-establishment.

The terminal according to claim 24, wherein the terminal further includes a report module, after executing the second processing module,

A radio resource control RRC connection re-establishment site, where the site is a site to which the terminal is currently attached, and the site currently attached to the terminal further includes a first site, and the terminal maintains a relationship between the terminal and the first site. An RRC connection, wherein the site comprises:

The station according to claim 26, wherein the determining module is specifically configured to: if the terminal has a second RRC connection with the station, determine whether to allow the terminal to perform the first RRC connection re-establishment ;

If there is no second RRC connection between the terminal and the station, it is determined whether the terminal is allowed to perform the first RRC connection re-establishment, or whether the terminal is allowed to perform RRC connection re-establishment with the station.

The station according to claim 27, wherein if there is a second RRC connection between the terminal and the second station,

The sending module is specifically used for

If the terminal is allowed to perform the first RRC connection re-establishment, the first RRC connection re-establishment indication message is sent to the terminal by using the second RRC connection, to notify the terminal to perform the first RRC connection re-establishment; or

If the terminal is not allowed to perform the first RRC connection re-establishment, the first RRC connection re-establishment prohibition indication message is sent to the terminal by using the second RRC connection, to notify the terminal that the terminal is not The first RRC connection is reestablished.

29. The station according to claim 27, wherein if there is no second RRC connection between the terminal and the second station,

The sending module is specifically used for

If the terminal is not allowed to perform the first RRC connection re-establishment, the second station sends a first RRC connection re-establishment prohibition indication message to the terminal, to notify the terminal not to perform the first RRC connection re-establishment; or ,

30. The station of claim 28 or 29, wherein

The first RRC connection re-establishment indication message includes information that is determined by the first station or determined by the station, where the terminal can perform a first RRC connection re-establishment; or

The indication message of the RRC connection re-establishment includes information of a cell that the station determines that the terminal can perform RRC connection re-establishment with the station.

The station according to claim 26, wherein the determining module is specifically configured to be used in

Determining whether to allow the terminal to perform the first RRC connection re-establishment or to determine whether to allow the terminal to establish a new RRC connection with the second station, based on the measurement result of the cell under the first station on the terminal;

Or sending a first RRC connection re-establishment negotiation message to the first station to report that the first station first radio link fails to occur in the first RRC connection.

The station according to claim 31, wherein the first RRC connection re-establishment negotiation message carries a measurement result of a cell of the terminal under the first station.

The station of claim 26, wherein the receiving module is further configured to send a first RRC connection re-establishment negotiation message to the first station, to report the first RRC connection of the first station. After a radio link failure occurs,

Receiving, by the first station, whether the terminal is allowed to perform result information of the first RRC connection re-establishment.

The station according to claim 33, wherein the receiving module is further configured to send, by the first station, a first RRC connection re-establishment negotiation message, to report that the first RRC connection occurs at the first station. After the wireless link fails,

Receiving, by the first station, the first RRC connection re-establishment negotiation acknowledgement message sent by the first station, where the first station allows the terminal to perform the first RRC connection re-establishment, the confirmation message includes the The terminal may perform information of the cell that is re-established by the first RRC connection; or if the first station does not allow the terminal to perform the first RRC connection re-establishment, receive the first RRC connection re-establishment reject message sent by the first station. .

The station according to claim 26, wherein the sending module is further configured to: if the station does not allow the terminal to perform the first RRC connection re-establishment, send the first RRC connection release to the first station The indication message, so that the first station releases the connection context information of the terminal.

The station according to claim 26, wherein the indication message is a physical downlink control signaling PDCCH, a medium access control MAC control element CE, or a radio resource control RRC message.

37. A radio resource control RRC connection re-establishment terminal, where the terminal currently attached to the terminal includes a first station and a second station, and the terminal maintains a first RRC connection with the first station, where The terminal includes:

a determining module, configured to determine, when the first RRC connection fails to generate a radio link, whether the signal quality of the cell of the second station is lower than a preset threshold;

The terminal according to claim 37, wherein the terminal further includes: a receiving module, configured to receive, during the RRC connection re-establishment process, a radio link failure that occurs when the second station sends a report An indication of the signal quality of the cell or the signal quality of the cell at the first station where the radio link failed;

The reporting module is configured to report, according to the indication, the signal quality of the cell in which the radio link fails or the signal quality of the cell in the first station where the radio link fails, to the second station.

39. A radio resource control RRC connection re-establishment terminal, where the terminal currently attached to the terminal includes a first station and a second station, and the terminal maintains a first RRC connection with the first station, where The terminal includes:

a determining module, configured to determine, when the first RRC connection fails to generate a radio link, whether the terminal is synchronized with the second station,

The terminal according to claim 39, wherein the sending module is specifically configured to be used in

And transmitting, by using the physical uplink control channel, the PUCCH channel, the first RRC connection to the second station to generate a radio link failure report message or an RRC connection fast re-establishment request.

Determining whether there is a valid uplink grant between the terminal and the second station; if there is no valid uplink grant, sending a scheduling request to the second station, and receiving an uplink grant allocated by the second station, utilizing Sending, by the allocated uplink, a report message or an RRC connection fast re-establishment request for transmitting a first RRC connection failure radio link to the second station;

Sending to the second site using the valid uplink grant if there is a valid uplink grant The first RRC connection generates a radio link failure report message or an RRC connection fast re-establishment request.

The terminal according to claim 39, wherein the RRC connection re-establishment message carries indication information indicating a signal quality of a cell in which a radio link failure occurs or a failure occurs in the first station where a radio link fails. Indication information of the signal quality of the cell;

The terminal further includes a reporting module, configured to report, according to the indication, a signal quality of a cell that fails to generate a radio link or the first failure of a radio link failure according to the indication, according to the indication The signal quality of the cell under the station.