CN107371195B

CN107371195B - Cell switching method, device and system

Info

Publication number: CN107371195B
Application number: CN201610311242.1A
Authority: CN
Inventors: 陈中明
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2016-05-11
Filing date: 2016-05-11
Publication date: 2021-06-15
Anticipated expiration: 2036-05-11
Also published as: CN107371195A; WO2017193842A1

Abstract

The invention provides a cell switching method, a device and a system. Wherein, the method comprises the following steps: receiving a switching command for indicating a terminal to switch from a source cell to a target cell, wherein the switching command carries first time information used for indicating the terminal to use in the source cell and/or second time information used for indicating the terminal to use in the target cell; the control terminal communicates in the source cell according to the first time information and communicates in the target cell according to the second time information; and when the access of the terminal to the target cell is finished according to the communication in the target cell, determining that the terminal is successfully switched. The invention solves the problem of lower switching efficiency when the cell switching is carried out on the common terminal or the terminal with lower supporting connection capability in the prior art, thereby achieving the effect of keeping the service uninterrupted and improving the switching efficiency.

Description

Cell switching method, device and system

Technical Field

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

Background

Fig. 1 is a schematic diagram of a protocol stack between a User Equipment or called a terminal (UE for short) and a base station (eNodeB for short, eNB) according to the related art, and as shown in fig. 1, a protocol stack of an interface between a UE and an eNB in a Long Term Evolution (Long Term Evolution, LTE for short) is divided into the following protocol layers from bottom to top: a Physical layer (PHY), a Media Access Control (MAC), a Radio Link Control (Radio Link Control, RLC), a Packet Data Convergence (PDCP), and a Radio Resource Control (RRC). Wherein, the PHY layer mainly transmits information to the MAC or higher layer through a transmission channel; the MAC layer mainly provides data transmission and is responsible for wireless resource allocation through a logical channel, and completes functions such as Hybrid ARQ (HARQ for short), Scheduling (SCH for short), priority processing, Multiplexing and demultiplexing (MUX for short), and the like; the RLC layer mainly provides segmentation and retransmission services for user and control data; the PDCP layer mainly transmits user data to the RRC layer or an upper layer of a user plane; the RRC layer mainly performs broadcasting (Broadcast), Paging (Paging), radio resource control connection management, radio bearer control, mobility function, terminal measurement reporting and control. Before the UE sends data to the base station, it needs to obtain uplink synchronization with the base station, that is, obtain a Time Advance (TA), and the UE achieves this purpose through a random access process, which is implemented at the MAC layer.

In a mobile communication system, in order to ensure service quality and provide good service experience for users, after a UE establishes a connection with a network in a certain cell, the UE still needs to measure signal quality of a serving cell and a neighboring cell and select a suitable cell for handover, so as to meet a mobility requirement. Fig. 2 is a flowchart of handover according to the related art, and as shown in fig. 2, in steps S202-S210, in the LTE system, when the terminal UE 202 receives a command from the network side and needs to perform handover (point a in fig. 2), the user plane resets (including MAC layer reset and PDCP and RLC layer re-establishment) and updates the configurations of the MAC, PDCP and RLC layers according to the requirement of the handover command, including configuring the bottom layer to use an integrity protection algorithm (integrity protection algorithm) and a ciphering algorithm (ciphering algorithm) of the target cell, and perform random access in the target cell 206, after the random access is completed, the UE may communicate with the target cell 206 (point B in fig. 2), and the UE 202 sends a handover complete command to the target cell 206. The UE 202 needs to disconnect data communication with the source cell 204 when the target cell 206 performs the random access procedure. Between the points a and B, the UE 202 cannot normally communicate with the source cell 204 and the target cell 206, which is called the interruption time of handover, and the interruption time is the time occupied by the random access procedure, i.e. the time between the start and the completion of the random access.

That is, currently, in the cell handover process, a certain interruption time is required to complete the handover from the source cell to the target cell, which inevitably requires interruption of the currently executed terminal service. Therefore, how to enable the normal terminal or the terminal with low connection supporting capability to realize the non-interrupted switching is a problem which needs to be solved urgently.

Disclosure of Invention

The embodiment of the invention provides a cell switching method, a device and a system, which are used for at least solving the problem of low switching efficiency caused by long service interruption time in the switching process of a related cell.

According to an embodiment of the present invention, a cell handover method is provided, including: receiving a handover command for instructing a terminal to handover from a source cell to a target cell, wherein the handover command carries first time information for instructing the terminal to use in the source cell and/or second time information for instructing the terminal to use in the target cell; controlling the terminal to communicate in the source cell according to the first time information and controlling the terminal to communicate in the target cell according to the second time information; and when the terminal completes the access of the terminal to the target cell according to the communication in the target cell, determining that the terminal is successfully switched.

Optionally, after receiving the handover command for instructing the terminal to handover from the source cell to the target cell, the method further includes: and acquiring a subframe indicated by the first time information in each radio frame and a subframe indicated by the second time information in each radio frame according to the switching command.

Optionally, the obtaining, according to the handover command, a subframe indicated by the first time information in each radio frame, and a subframe indicated by the second time information in each radio frame include: acquiring a subframe allocation mode indicated by a preset bit in the switching command; and acquiring the subframe indicated by the first time information in each wireless frame and the subframe indicated by the second time information in each wireless frame according to the indicated subframe allocation mode.

Optionally, the subframe indicated by the first time information includes: even subframes in each radio frame or odd subframes in each radio frame; the subframe indicated by the second time information includes: odd subframes in each radio frame or even subframes in each radio frame.

Optionally, the subframe indicated by the first time information includes: the first five subframes in each radio frame or the last five subframes in each radio frame; the subframe indicated by the second time information includes: the last five subframes in each radio frame or the first five subframes in each radio frame.

Optionally, the subframe indicated by the first time information and the subframe indicated by the second time information are alternately configured according to a predetermined subframe width.

Optionally, the subframe indicated by the first time information and the subframe indicated by the second time information are alternately configured according to a predetermined subframe width from an odd-numbered frame of every two radio frames, or the subframe indicated by the first time information and the subframe indicated by the second time information are alternately configured according to the predetermined subframe width from an even-numbered frame of every two radio frames.

Optionally, the predetermined subframe width includes at least one of: two subframes, four subframes.

Optionally, when the handover command carries first time information used for indicating that the terminal is in use in the source cell, the second time information is determined according to the first time information.

Optionally, the controlling the terminal to communicate in the source cell according to the first time information and to communicate in the target cell according to the second time information includes: controlling the terminal to communicate in the source cell on a subframe indicated by the first time information; and controlling the terminal to execute a random access process to the target cell on the subframe indicated by the second time information.

Optionally, the controlling the terminal to perform the random access procedure to the target cell on the subframe indicated by the second time information includes: acquiring a target subframe used by the target cell for executing the random access process; searching the target subframe on the subframe indicated by the second time information; and sending random access preamble information to the target cell on the target subframe found on the subframe indicated by the second time information, wherein the random access preamble information carries a predetermined identifier configured to the terminal by the target cell.

Optionally, after receiving the handover command for instructing the terminal to handover from the source cell to the target cell, the method further includes: and adjusting the conversion parameters of the terminal in a preset subframe.

Optionally, adjusting the conversion parameter of the terminal in a predetermined subframe includes: adjusting the switching parameter of the terminal in a first subframe of subframes indicated by the first time information and the second time information respectively; or adjusting the transition parameter of the terminal in the last subframe of the subframes indicated by the first time information and the second time information, respectively.

Optionally, after the terminal completes access to the target cell according to the communication in the target cell, the method further includes at least one of: automatically deleting the first time information and/or the second time information in the switching command; and disconnecting the terminal from the source cell.

According to another embodiment of the present invention, a cell handover method is provided, including: sending a handover command for instructing the terminal to handover from a source cell to a target cell to the terminal, wherein the handover command carries first time information for instructing the terminal to use in the source cell and/or second time information for instructing the terminal to use in the target cell; communicating with the terminal in the source cell according to the first time information; and when the terminal completes the access to the target cell according to the communication in the target cell, disconnecting the terminal from the terminal.

Optionally, before the sending, to the terminal, a handover command for instructing the terminal to handover from the source cell to the target cell, the method further includes: configuring, in the handover command, a subframe indicated by the first time information in each radio frame and/or a subframe indicated by the second time information in each radio frame; and generating the switching command according to the subframe indicated by the first time information and/or the subframe indicated by the second time information.

Optionally, the configuring, in the handover command, a subframe indicated by the first time information in each radio frame, and/or a subframe indicated by the second time information in each radio frame includes: configuring the even numbered subframes in each radio frame as the subframes indicated by the first time information, and configuring the odd numbered subframes in each radio frame as the subframes indicated by the second time information; or configuring odd subframes in each radio frame as subframes indicated by the first time information, and configuring odd subframes in each radio frame as subframes indicated by the second time information.

Optionally, the configuring, in the handover command, a subframe indicated by the first time information in each radio frame, and/or a subframe indicated by the second time information in each radio frame includes: configuring the first five subframes of each radio frame as the subframes indicated by the first time information, and configuring the last five subframes of each radio frame as the subframes indicated by the second time information; or configuring the last five subframes in each radio frame as the subframes indicated by the first time information, and configuring the first five subframes in each radio frame as the subframes indicated by the second time information.

Optionally, the configuring, in the handover command, a subframe indicated by the first time information in each radio frame, and/or a subframe indicated by the second time information in each radio frame includes: and alternately configuring the subframe indicated by the first time information and/or the subframe indicated by the second time information according to a preset subframe width.

Optionally, the alternately configuring, according to a predetermined subframe width, the subframe indicated by the first time information and/or the subframe indicated by the second time information includes: starting from an odd frame of every two wireless frames, alternately configuring subframes indicated by the first time information and/or subframes indicated by the second time information according to the preset subframe width; or starting from an even-numbered frame of every two wireless frames, and alternately configuring the subframe indicated by the first time information and/or the subframe indicated by the second time information according to the preset subframe width.

Optionally, configuring, in the handover command, a subframe indicated by the first time information in each radio frame, and/or a subframe indicated by the second time information in each radio frame includes: and configuring a subframe allocation mode at a predetermined bit, wherein the subframe allocation mode is used for indicating the configuration of the subframe indicated by the first time information and/or the subframe indicated by the second time information in each radio frame.

Optionally, before the sending, to the terminal, a handover command for instructing the terminal to handover from the source cell to the target cell, the method further includes: configuring a predetermined subframe for adjusting a transition parameter in the handover command, wherein the transition parameter includes at least one of: frequency, bandwidth.

According to still another embodiment of the present invention, there is provided a cell switching apparatus including: a receiving unit, configured to receive a handover command for instructing a terminal to handover from a source cell to a target cell, where the handover command carries first time information used for instructing the terminal to use in the source cell and/or second time information used for instructing the terminal to use in the target cell; a control unit configured to control the terminal to perform communication in the source cell according to the first time information and to control the terminal to perform communication in the target cell according to the second time information; and a switching unit, configured to determine that the terminal is successfully switched after the terminal completes access to the target cell according to communication in the target cell.

Optionally, the method further comprises: a first obtaining unit, configured to obtain, according to the handover command, a subframe indicated by the first time information in each radio frame and a subframe indicated by the second time information in each radio frame after the receiving of the handover command instructing the terminal to handover from the source cell to the target cell.

Optionally, the first obtaining unit includes: a first obtaining module, configured to obtain, after the receiving a handover command for instructing a terminal to handover from a source cell to a target cell, a subframe allocation manner indicated by a predetermined bit in the handover command; a second obtaining module, configured to obtain, according to the indicated subframe allocation manner, a subframe indicated by the first time information in each radio frame, and a subframe indicated by the second time information in each radio frame.

According to still another embodiment of the present invention, there is provided a cell switching apparatus including: a sending unit, configured to send, to a terminal, a handover command for instructing the terminal to handover from a source cell to a target cell, where the handover command carries first time information used for instructing the terminal to use in the source cell and/or second time information used for instructing the terminal to use in the target cell; a communication unit, configured to communicate with the terminal in the source cell according to the first time information; a switching unit, configured to disconnect the terminal from the target cell after the terminal completes access to the target cell according to communication in the target cell.

Optionally, the method further comprises: a first configuration unit, configured to configure, in the handover command, a subframe indicated by the first time information in each radio frame and/or a subframe indicated by the second time information in each radio frame before the handover command instructing the terminal to handover from the source cell to the target cell is sent to the terminal; and a generating unit, configured to generate the handover command according to the subframe indicated by the first time information and/or the subframe indicated by the second time information.

Optionally, the first configuration unit includes: a first configuration module, configured to configure even subframes in each radio frame as subframes indicated by the first time information, and configure odd subframes in each radio frame as subframes indicated by the second time information; or a second configuration module, configured to configure odd subframes in each radio frame as subframes indicated by the first time information, and configure odd subframes in each radio frame as subframes indicated by the second time information.

Optionally, the first configuration unit includes: a third configuring module, configured to configure the first five subframes in each radio frame as subframes indicated by the first time information, and configure the last five subframes in each radio frame as subframes indicated by the second time information; or a fourth configuring module, configured to configure the last five subframes in each radio frame as the subframes indicated by the first time information, and configure the first five subframes in each radio frame as the subframes indicated by the second time information.

Optionally, the first configuration unit includes: a fifth configuring module, configured to alternately configure, according to a predetermined subframe width, a subframe indicated by the first time information and a subframe indicated by the second time information.

Optionally, the fifth configuration module includes: a first configuration sub-module, configured to alternately configure, starting from an odd-numbered frame of every two radio frames, a subframe indicated by the first time information and/or a subframe indicated by the second time information according to the predetermined subframe width; or a second configuration submodule, configured to alternately configure, from an even-numbered frame of every two radio frames, a subframe indicated by the first time information and/or a subframe indicated by the second time information according to the predetermined subframe width.

Optionally, the first configuration unit includes: a sixth configuring module, configured to configure a subframe allocation manner at a predetermined bit, where the subframe allocation manner is used to indicate a configuration of a subframe indicated by the first time information and/or a subframe indicated by the second time information in each radio frame.

Optionally, the method further comprises: an adjusting unit, configured to configure a predetermined subframe for adjusting a transition parameter in the handover command before the handover command for instructing the terminal to handover from the source cell to the target cell is sent to the terminal, where the transition parameter includes at least one of: frequency, bandwidth.

According to another embodiment of the present invention, a cell switching system is provided, including a base station corresponding to a source cell and a terminal, where the base station corresponding to the source cell sends a handover command to the terminal, where the handover command is used to instruct the terminal to switch from the source cell to a target cell, where the handover command carries first time information used to instruct the terminal to use in the source cell and/or second time information used to instruct the terminal to use in the target cell; the terminal performs communication in the source cell according to the first time information and performs communication in the target cell according to the second time information; and when the terminal completes the access of the terminal to the target cell according to the communication in the target cell, determining that the terminal is successfully switched.

According to still another embodiment of the present invention, there is also provided a storage medium. The storage medium is configured to store program code for performing the steps of: receiving a handover command for instructing a terminal to handover from a source cell to a target cell, wherein the handover command carries first time information for instructing the terminal to use in the source cell and/or second time information for instructing the terminal to use in the target cell; controlling the terminal to communicate in the source cell according to the first time information and controlling the terminal to communicate in the target cell according to the second time information; and when the terminal completes the access of the terminal to the target cell according to the communication in the target cell, determining that the terminal is successfully switched.

Optionally, the storage medium is further arranged to store program code for performing the steps of: and after receiving a switching command for instructing the terminal to switch from the source cell to the target cell, acquiring a subframe indicated by the first time information in each radio frame and a subframe indicated by the second time information in each radio frame according to the switching command.

Optionally, the storage medium is further arranged to store program code for performing the steps of: acquiring a subframe allocation mode indicated by a preset bit in the switching command; and acquiring the subframe indicated by the first time information in each wireless frame and the subframe indicated by the second time information in each wireless frame according to the indicated subframe allocation mode.

According to the invention, in the process of switching the terminal from the source cell to the target cell, the terminal is respectively interacted with the source cell and the target cell in a time division multiplexing mode, namely, the terminal is communicated in the source cell according to the first time information in the switching command and communicated in the target cell according to the second time information in the switching command, so that the random access process of the target cell is executed while the terminal is kept connected with the source cell before the terminal is successfully switched to the target cell, the terminal service is ensured not to be interrupted, the problems that the currently executed terminal service needs to be interrupted when the terminal with lower connection supporting capacity is switched to the cell, the switching efficiency is lower due to longer service interruption time are further solved, and the effect of improving the cell switching efficiency is further realized.

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 diagram illustrating a protocol stack between a user equipment and a base station in the related art;

fig. 2 is a flowchart of a cell handover method in the related art;

fig. 3 is a flow chart of an alternative cell switching method according to an embodiment of the present invention;

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

fig. 5 is a schematic diagram of an alternative cell handover method according to an embodiment of the present invention;

fig. 6 is a flow chart of yet another alternative cell switching method according to an embodiment of the present invention;

fig. 7 is a flow chart of yet another alternative cell switching method according to an embodiment of the present invention;

fig. 8 is a schematic diagram of an alternative cell switching apparatus according to an embodiment of the present invention;

fig. 9 is a schematic diagram of another alternative cell switching apparatus according to an embodiment of the present invention; and

fig. 10 is a schematic diagram of an alternative cell switching system 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.

Example 1

In this embodiment, a cell handover method is provided, and fig. 3 is a flowchart according to an embodiment of the present invention, as shown in fig. 3, the flowchart includes the following steps:

s302, receiving a handover command for instructing a terminal to handover from a source cell to a target cell, wherein the handover command carries first time information for instructing the terminal to use in the source cell and/or second time information for instructing the terminal to use in the target cell;

s304, the control terminal communicates in the source cell according to the first time information and communicates in the target cell according to the second time information;

s306, after the terminal completes the access of the terminal to the target cell according to the communication in the target cell, the terminal is determined to be successfully switched.

Optionally, in this embodiment, the cell handover method may be, but is not limited to, applied to a terminal of a cell handover system. Specifically, the terminal receives a handover command for instructing the terminal to handover from a source cell to a target cell, where the handover command carries first time information for instructing the terminal to use in the source cell and/or second time information for instructing the terminal to use in the target cell; the terminal communicates in a source cell according to the first time information and communicates in a target cell according to the second time information; and when the access of the terminal to the target cell is finished according to the communication in the target cell, determining that the terminal is successfully switched.

It should be noted that, in this embodiment, in the process of switching the terminal from the source cell to the target cell, the terminal interacts with the source cell and the target cell respectively by using a time division multiplexing manner, that is, the terminal communicates with the source cell according to the first time information in the handover command and communicates with the target cell according to the second time information in the handover command, so that before the terminal is successfully switched to the target cell, the terminal can maintain connection with the source cell and communicate with the target cell at the same time, so as to ensure that the terminal service is not interrupted, and further overcome the problem that in the prior art, when a terminal or a terminal with low support connection capability performs cell switching, the currently executed terminal service needs to be interrupted, and the service interruption time is long, which results in lower switching efficiency, and further achieve the effect of improving the cell switching efficiency.

Optionally, in this embodiment, when the handover command carries first time information used for indicating that the terminal is in use in the source cell, the second time information may be determined by calculating according to a predetermined algorithm, but not limited to, according to the first time information.

Optionally, in this embodiment, after receiving a handover command for instructing the terminal to handover from the source cell to the target cell, the method further includes: and acquiring a subframe indicated by the first time information in each radio frame and a subframe indicated by the second time information in each radio frame according to the switching command.

That is, in the present embodiment, the first time information in the handover command may be, but is not limited to, a subframe usable between the terminal and the base station corresponding to the source cell in each radio frame, and the second time information in the handover command may be, but is not limited to, a subframe usable between the terminal and the base station corresponding to the target cell in each radio frame.

The subframe configuration manner in each radio frame may include, but is not limited to, at least one of the following:

1) acquiring identifiers which are respectively configured on each subframe in each wireless frame and correspond to a source cell and a target cell, wherein the identifiers are used for indicating whether the subframe is available in the source cell or the target cell;

2) and acquiring a subframe allocation mode indicated by a preset bit in the switching command, wherein the subframe allocation mode is used for indicating a subframe indicated by the first time information in each radio frame and a subframe indicated by the second time information in each radio frame.

It should be noted that, in the embodiment, in the above mode 2), the subframe allocation manner indicated by the predetermined bit may be a preconfigured manner, such as bit 00 flag manner one, 01 flag manner two, 10 flag manner three, 11 flag manner four, and so on. The pre-configuration mode may include, but is not limited to: a predetermined configuration mode, a default configuration mode and a random configuration mode.

Further, in this embodiment, configuring the subframe according to the predetermined configuration manner may include, but is not limited to, at least one of:

1) the subframe indicated by the first time information includes: even numbered subframes in each radio frame, the subframes indicated by the second time information include: odd subframes in each radio frame; or, the subframe indicated by the first time information includes: odd subframes in each radio frame; the subframe indicated by the second time information includes: even numbered subframes in each radio frame;

for example, each radio frame is repeated, the source cell uses even numbered subframes of each radio frame, and the target cell uses odd numbered subframes of each radio frame, or vice versa, the source cell uses odd numbered subframes of each radio frame, and the target cell uses even numbered subframes of each radio frame.

2) The subframe indicated by the first time information includes: the first five subframes in each radio frame, the subframe indicated by the second time information comprising: the last five subframes in each radio frame; or, the subframe indicated by the first time information includes: the last five subframes in each radio frame, the subframe indicated by the second time information includes: the first five subframes in each radio frame.

For example, each radio frame is repeated, the source cell uses the first five subframes of each radio frame and the target cell uses the last five subframes of each radio frame, or vice versa, the source cell uses the last five subframes of each radio frame and the target cell uses the first five subframes of each radio frame.

3) The subframe indicated by the first time information and the subframe indicated by the second time information are alternately configured according to a predetermined subframe width.

For example, the alternate configuration is repeated in a predetermined subframe width in each radio frame, or every two or every three or every four subframes. Wherein the predetermined subframe width comprises at least one of: two subframes, four subframes.

Optionally, in this embodiment, the alternating configuration in every two radio frames may include, but is not limited to, at least one of the following: the subframe indicated by the first time information and the subframe indicated by the second time information are alternately configured according to a predetermined subframe width from an odd-numbered frame of every two radio frames, or the subframe indicated by the first time information and the subframe indicated by the second time information are alternately configured according to a predetermined subframe width from an even-numbered frame of every two radio frames.

For example, every two radio frames are repeated, the first two subframes of the even-numbered frame are used by the source cell, the next two subframes are used by the target cell, and so on; or, the first two subframes of the even-numbered frame are used by the target cell, the next two subframes are used by the source cell, and so on; or, the first two subframes of the odd-numbered frame are used by the source cell, the next two subframes are used by the target cell, and so on; or, the first two subframes of the odd-numbered frame are used by the target cell, the next two subframes are used by the source cell, and so on.

For another example, every two radio frames are repeated, the first four subframes of the even-numbered frame are used by the source cell, the next four subframes are used by the target cell, and so on; or, the first four subframes of the even-numbered frame are used by the target cell, the next four subframes are used by the source cell, and so on; or, the first four subframes of the odd-numbered frame are used by the source cell, the next four subframes are used by the target cell, and so on; or, the first four subframes of the odd-numbered frame are used by the target cell, the next four subframes are used by the source cell, and so on.

Optionally, in this embodiment, after receiving a handover command for instructing the terminal to handover from the source cell to the target cell, the method further includes: and adjusting the conversion parameters of the terminal in a preset subframe.

In this embodiment, the adjusting of the terminal switching parameter in the predetermined subframe may include, but is not limited to: judging whether a switching condition is met according to the switching command, wherein the switching condition comprises at least one of the following conditions: the source cell and the target cell are same-frequency cells, and the bandwidths of the source cell and the target cell are the same; and when the switching condition is not met, adjusting the switching parameter of the terminal in a preset subframe.

Optionally, in this embodiment, adjusting the transition parameter of the terminal in the predetermined subframe includes:

1) adjusting the conversion parameters of the terminal in a first subframe in subframes indicated by the first time information and the second time information respectively; or

2) And adjusting the conversion parameter of the terminal in the last subframe in the subframes indicated by the first time information and the second time information respectively.

It should be noted that, in this embodiment, since the switching parameter needs to be adjusted not only when the handover is performed from the source cell to the target cell, the terminal can normally execute the corresponding service; when switching from the target cell to the source cell, the switching parameter also needs to be adjusted so that the terminal can normally execute the corresponding service. Here, when interacting with the base stations of the cells respectively corresponding to the indicated subframes in a time division multiplexing manner, corresponding parameter conversion is required, for example, when the source cell and the target cell are different-frequency cells, corresponding frequency conversion is required; for another example, when the operating bandwidths of the source cell and the target cell are different, corresponding bandwidth conversion is required.

The description is made with reference to the example shown in fig. 4:

s402, the terminal 402 and the base station corresponding to the source cell 404 perform normal data communication;

s404, the terminal 402 receives a handover command (as shown in point a in fig. 4) sent by the network side (the base station corresponding to the source cell 404), and the terminal 402 obtains a subframe or time information (subframe indicated by the first time information) that can be used by the terminal in the source cell 404 and a subframe or time information (subframe indicated by the second time information) that can be used in the target cell 406 through the handover command, applies the configuration of the target cell according to the requirement of the handover command, and simultaneously retains the configuration of the source cell;

s406, the terminal 402 performs a handover procedure, as in step S406-1, the terminal 402 performs normal data transceiving in the source cell 404 through the usable subframe or time, as in step S406-2, the terminal 402 performs a random access procedure in the target cell 406 through the usable subframe or time;

s408, after the random access is completed, the terminal 402 may perform data communication with the target cell 406 (as shown in point B in fig. 4);

s410, the terminal 402 sends a handover complete command to the target cell 406, and performs user plane reset (including MAC layer reset and PDCP, RLC layer re-establishment) by itself, disconnects the source cell, and applies the configuration of the target cell, so that all subframes or time on the target cell can be used normally.

The subframes allocated in the source cell and the target cell may include at least one of the following cases as shown in fig. 5:

the first method is as follows: repeating every radio frame, the source cell adopting even numbered subframes of every radio frame, the target cell adopting odd numbered subframes of every radio frame, or vice versa, the source cell adopting odd numbered subframes of every radio frame, the target cell adopting even numbered subframes of every radio frame,

the second method comprises the following steps: repeating every two wireless frames, wherein the first two subframes of the even-numbered frame are used by the source cell, the second two subframes are used by the target cell, and the like, or vice versa, the first two subframes of the even-numbered frame are used by the target cell, the second two subframes are used by the source cell, and the like, or the first two subframes of the odd-numbered frame are used by the source cell, the second two subframes are used by the target cell, and the like, or the first two subframes of the odd-numbered frame are used by the target cell, the second two subframes are used by the source cell, and the like.

The third method comprises the following steps: repeating every two wireless frames, wherein the first four subframes of the even-numbered frame are used by the source cell, the next four subframes are used by the target cell, and the like, or vice versa, the first four subframes of the even-numbered frame are used by the target cell, the next four subframes are used by the source cell, and the like, or the first four subframes of the odd-numbered frame are used by the source cell, the next four subframes are used by the target cell, and the like, or the first four subframes of the odd-numbered frame are used by the target cell, the next four subframes are used by the source cell, and the like.

The method is as follows: each radio frame repetition, the source cell using the first five subframes of each radio frame and the target cell using the last five subframes of each radio frame, or vice versa, the source cell using the last five subframes of each radio frame and the target cell using the first five subframes of each radio frame,

the above mode can be expressed by one indication bit, such as bit 00 marking mode one, 01 marking mode two, 10 marking mode three, 11 marking mode four, and so on

The fifth mode is as follows: or each radio frame repetition or every two, three or four waiting radio frame repetitions, allocating an indication identification bit to each time unit, such as each subframe, wherein the indication identification bit is 0 or 1 for the source cell and the indication identification bit is 1 or 0 for the target cell, and the random allocation can be realized.

In the above manner, one indication bit per time unit is required.

According to the embodiment provided by the application, in the process of switching the terminal from the source cell to the target cell, the terminal is respectively interacted with the source cell and the target cell by adopting a time division multiplexing mode, namely, the terminal is communicated with the source cell according to the first time information in the switching command and is communicated with the target cell according to the second time information in the switching command, so that the terminal can be communicated with the target cell while the connection with the source cell is kept before the terminal is successfully switched to the target cell, the terminal service is ensured not to be interrupted, the problems that the currently executed terminal service needs to be interrupted when the terminal or the terminal with lower support connection capacity is subjected to cell switching in the prior art, the switching efficiency is lower due to longer service interruption time are solved, and the effect of improving the cell switching efficiency is further realized.

As an optional scheme, after receiving a handover command for instructing the terminal to handover from the source cell to the target cell, the method further includes:

s1, acquiring the subframe indicated by the first time information in each radio frame and the subframe indicated by the second time information in each radio frame according to the handover command.

Optionally, in this embodiment, the manner of configuring the subframe in each radio frame may include, but is not limited to, at least one of the following:

for example, as shown in fig. 5, each subframe in the radio frame is configured with a corresponding identifier to indicate an available cell, for example, if the source cell is configured with identifier 1 and the target cell is configured with identifier 0, the subframes respectively indicated by the first time information and the second time information in the radio frame can be obtained by obtaining the corresponding identifiers in the handover command.

For example, when the predetermined bit indicates 00, the radio frame is indicated to be a subframe configured for the source cell and the target cell in the manner shown in fig. 5; when the predetermined bit indication is 01, indicating that the radio frame is a subframe configured for the source cell and the target cell in a second manner as shown in fig. 5; when the predetermined bit indication is 10, indicating that the radio frame is a subframe configured for the source cell and the target cell in the manner shown in fig. 5; when the predetermined bit indication is 11, it indicates that the radio frame is a subframe configured for the source cell and the target cell in the manner shown in fig. 5. It should be noted that, as the mode style increases, the number of bits of the predetermined bit may be increased, for example, the predetermined bit of 3 bits is used to indicate 8 configuration modes, and the specific process is the above process, and is not described herein again.

According to the embodiment provided by the application, the subframes configured for the source cell and the target cell are respectively obtained according to the switching command, so that the terminal can be switched from the source cell to the target cell under the condition of uninterrupted service according to the time division multiplexing mode on the corresponding different subframes, and the cell switching efficiency is further ensured.

As an alternative, the subframe indicated by the first time information includes: even subframes in each radio frame or odd subframes in each radio frame; the subframe indicated by the second time information includes: odd numbered subframes in each radio frame or even numbered subframes in each radio frame.

As an alternative, the subframe indicated by the first time information includes: the first five subframes in each radio frame or the last five subframes in each radio frame; the subframe indicated by the second time information includes: the last five subframes in each radio frame or the first five subframes in each radio frame.

As an alternative, the subframe indicated by the first time information and the subframe indicated by the second time information are alternately configured according to a predetermined subframe width.

Optionally, in this embodiment, starting from an odd-numbered frame of every two radio frames, the subframe indicated by the first time information and the subframe indicated by the second time information are alternately configured according to a predetermined subframe width, or starting from an even-numbered frame of every two radio frames, the subframe indicated by the first time information and the subframe indicated by the second time information are alternately configured according to a predetermined subframe width.

Through the embodiment provided by the application, the corresponding subframes are configured for the source cell and the target cell according to different modes, so that the service is not interrupted in the process of switching the terminal from the source cell to the target cell, the purpose of reducing the service interruption time is achieved, and the problem of low efficiency caused by service interruption required by cell switching at present is solved.

As an optional scheme, the controlling the terminal to perform communication in the source cell according to the first time information, and the controlling the terminal to perform communication in the target cell according to the second time information includes:

s1, the control terminal communicates in the source cell on the sub-frame indicated by the first time information;

and S2, the control terminal executes the random access process to the target cell on the subframe indicated by the second time information.

Optionally, in this embodiment, the controlling the terminal to perform the random access procedure to the target cell on the subframe indicated by the second time information includes:

s22, acquiring a target subframe used by the target cell for executing the random access process;

s24, searching a target subframe on the subframe indicated by the second time information;

and S26, sending random access preamble information to the target cell on the target subframe found on the subframe indicated by the second time information, wherein the random access preamble information carries a predetermined identifier configured to the terminal by the target cell.

It should be noted that the subframe in which the target cell performs the random access procedure is a predetermined target subframe, and not all subframes may perform the random access procedure, and thus, in this embodiment, when the terminal performs the random access procedure on the target cell on the subframe indicated by the second time information, the method may include, but is not limited to: and sending random access preamble information to the target cell on the target subframe for executing random access searched from the subframe indicated by the second time information, wherein the random access preamble information carries a predetermined identifier configured to the terminal by the target cell. Therefore, the subframe of the terminal accessing the target cell is further searched and obtained from the screened candidate subframes, so that the random access process of the target cell is completed on the subframe.

s1, adjusting the switching parameter of the terminal in the predetermined subframe.

It should be noted that, in this embodiment, when it is inferred that the source cell and the target cell are different-frequency cells (different operating frequency points) or cells with different operating bandwidths (same operating frequency points) according to the handover command, the method may, but is not limited to, perform corresponding adjustment on the handover parameters on a predetermined subframe, for example, perform the corresponding adjustment on the handover parameters, such as the handover operating frequency or adjust the operating bandwidth.

As an optional scheme, after completing the access of the terminal to the target cell according to the communication in the target cell, the method further includes at least one of the following steps:

s1, automatically deleting the first time information and/or the second time information in the switching command;

and S2, disconnecting the terminal from the source cell.

According to the embodiment provided by the application, the corresponding content in the switching command is automatically deleted, so that the deletion operation is prevented from being executed through multiple times of signaling interaction, and the switching efficiency is further ensured. In addition, the interactive overhead of the switching process is greatly reduced.

Specifically, the cell switching method is described with reference to the example shown in fig. 6:

as an alternative embodiment, it is assumed that cell 1 (source cell) is a cell of LTE, and the center carrier frequency is f 1. Cell 2 (target cell) is a cell of LTE, which is a neighbor cell of cell 1, and the center carrier frequency is f 2. That is, the source cell and the target cell are inter-frequency cells.

The method comprises the following steps: the UE is currently in a connected state in cell 1. The network side issues a Measurement task (Measurement control) of a trigger event (A3) that the signal quality of the neighboring cell is better than that of the serving cell to the UE, and the carrier frequency of a Measurement object is f 2.

Step two: and the UE performs Measurement, finds that the cell 2 on the f2 meets the trigger condition of the event A3, and reports a Measurement report (Measurement report) to the network side.

Step three: the network side decides to let the UE Handover (Handover) to cell 2 and sends a Handover preparation command (Handover request) to cell 2.

Step four: after receiving the Handover preparation command, the Cell 2 allocates a preamble, which is included in a Handover command (Handover request ack) and transmitted to the Cell 1, where the Handover command further includes a Cell-Radio Network temporary Identity (C-RNTI) of the terminal allocated by the Cell 2 in the Cell 2 and information of the Cell 2 (for example, information related to f2 and f2 and other information of the Cell 2), and the Cell 1 forwards the Handover command to the UE (RRC reconfiguration).

Step five: after receiving the handover command, the UE knows that the subframe or time information of the active cell, i.e. cell 1, is, for example, the first five subframes of each radio frame, and the subframe or time information of the target cell, i.e. cell 2, is, for example, the last five subframes of each radio frame, i.e. the mode four, and knows that the time division multiplexing seamless handover needs to be performed, according to the specification or default, the terminal performs frequency conversion in the first subframe allocated to a certain cell, i.e. in the first subframe of the first five subframes (the time information allocated to the source cell) of each radio frame, the terminal converts the working frequency point to the source cell (the subsequent four subframes can work in the source cell), in the first subframe of the subsequent five subframes (the time information allocated to the target cell) of each radio frame, the terminal converts the working frequency point to the target cell (the subsequent four subframes can work in the target cell), normal data scheduling then begins.

Or, according to the regulation or default, the terminal performs frequency conversion in the last subframe allocated to a certain cell, that is, in the last subframe (time information allocated to the source cell) of the first five subframes of each radio frame, the terminal converts the working frequency point to the target cell (the subsequent subframe is allocated to the target cell and is therefore to be converted), and in the last subframe (time information allocated to the target cell) of the last five subframes of each radio frame, the terminal converts the working frequency point to the source cell (the subsequent subframe is allocated to the source cell and is therefore to be converted), and then starts normal data scheduling.

The above is that the terminal knows the time or sub-frame when the terminal performs frequency conversion through the indication in the handover command, or the time or sub-frame is called as the time or sub-frame allowing service interruption.

The configuration related to the cell 2 is applied, including the configuration related to the RACH in the MAC layer and the configuration related to the RACH in the physical layer, and a random access procedure is performed in subframes (the last five subframes of each radio frame) that can be used by the cell 2, that is, the terminal sends a random access preamble (Message1) to the cell 2, where the Message1 includes a dedicated preamble (dedicated preamble) provided by the cell 2, and is a dedicated resource configured by the cell 2 to the terminal.

At this time, the terminal performs normal data communication on cell 1 using the subframes (the first five subframes of each radio frame) that cell 1 can use.

Step six: after receiving the Message1, the cell 2 reserves resources for the UE, and responds to the Message2, which includes the TA and/or the grant information (UL grant) transmitted by the UE on the uplink.

Step seven: after the UE receives the Message2, the random access procedure without collision executed in the cell 2 is finished, the UE obtains downlink synchronization and TA with the cell 2, considering that the handover is successful, the terminal completes the reset procedure of the user plane protocol by itself, resets the subframes including the MAC layer reset, the PDCP layer and the RLC layer re-establishment, and automatically deletes the subframe or time information of the source cell and the target cell configured in the handover command, that is, starts to communicate with the cell 2 at this time, all subframes of the target cell (i.e., the cell 2) can be used normally, sends a Message3(HO complete) for indicating that the handover is completed to the cell 2, the cell 2 notifies the core network to perform Path switching (Path Switch), and indicates the cell 1, the UE has accessed the cell 2, and at this time, the terminal disconnects the communication with the cell 1. After receiving the indication, the cell 1 will know that the information of the subframe configured in the time division multiplexing manner is invalid.

In the above, since the target cell is for performing the random access procedure, the time allocation may be performed according to the configuration of the random access of the target cell.

As another alternative, it is assumed that cell 1 (source cell) is a cell of LTE, and the center carrier frequency is f 1. Cell 2 (target cell) is a cell of LTE, which is a neighbor cell of cell 1, and the center carrier frequency is f 1. That is, the source cell and the target cell are co-frequency cells.

The method comprises the following steps: the UE is currently in a connected state in cell 1. The network side issues a Measurement task (Measurement control) of a trigger event (A3) that the signal quality of the neighboring cell is better than that of the serving cell to the UE, and the carrier frequency of a Measurement object is f 1.

Step two: and the UE performs Measurement, finds that the cell 2 on the f1 meets the trigger condition of the event A3, and reports a Measurement report (Measurement report) to the network side.

Step five: after receiving the handover command, the UE knows that the subframes or time information of the active cell, i.e. cell 1, are even subframes of each radio frame, and the subframes or time information of the target cell, i.e. cell 2, are odd subframes of each radio frame, i.e. mode one, knows that it is necessary to perform seamless handover of time division multiplexing,

the configuration related to the cell 2 is applied, including the configuration related to the RACH in the MAC layer and the configuration related to the RACH in the physical layer, and a random access procedure is performed in subframes (odd subframes of each radio frame) that can be used by the cell 2, that is, the terminal sends a random access preamble (Message1) to the cell 2, where the Message1 includes a dedicated preamble (dedicated preamble) provided by the cell 2, and is a dedicated resource configured by the cell 2 to the terminal.

At this time, the terminal performs normal data communication in cell 1 using subframes (even-numbered subframes per radio frame) that can be used by cell 1.

Step seven: after the UE receives the Message2, the random access procedure without collision executed in the cell 2 is finished, the UE obtains downlink synchronization and TA with the cell 2, considering that the handover is successful, the terminal completes the reset procedure of the user plane protocol by itself, the reset includes the reset of the MAC layer, the reestablishment of the PDCP layer and the RLC layer, and starts to communicate with the cell 2, all subframes of the cell 2 can be used normally, sends a Message3(HO complete) for indicating that the handover is finished to the cell 2, the cell 2 informs the core network to perform Path switching (Path Switch), and indicates the cell 1, the UE has accessed the cell 2, and at this time, the terminal disconnects the communication with the cell 1. After receiving the indication, the cell 1 will know that the information of the subframe configured in the time division multiplexing manner is invalid.

The fifth step may also be, but is not limited to: after receiving the handover command, the UE knows the subframe or time information of the active cell, i.e., cell 1, and the subframe or time information of the target cell, i.e., cell 2, for example, the first two subframes of each even-numbered radio frame are configured to cell 1, the next two subframes are configured to cell 2, and so on, i.e., manner two, it knows that the time division multiplexing seamless handover needs to be performed.

But also not limited to: after receiving the handover command, the UE learns the subframe or time information of the active cell, i.e., cell 1, and the subframe or time information of the target cell, i.e., cell 2, for example, the first four subframes of each even-numbered frame are configured to cell 1, the next four subframes are configured to cell 2, and so on, i.e., the third method.

The UE may also, but not limited to, obtain subframe or time information of an active cell, that is, cell 1, and subframe or time information of a target cell, that is, cell 2, after receiving the handover command, for example, in each radio frame, a bit set to 0 indicates that the UE is configured to be used by cell 1, a bit set to 1 indicates that the UE is configured to be used by cell 2, and the configuration is 00011111100, that is, each radio frame, and

subframes

0, 1, and 2 are configured to cell 1; 3. 4, 5, 6, 7 sub-frames are configured to the cell 2; 8. subframe number 9 is allocated to cell 1.

In this example, since the source cell and the target cell are of the same frequency, the terminal does not need to perform frequency conversion, and thus does not need to perform designation of a time or a subframe for frequency conversion. If the terminal needs to do other preparation work, such as adjusting the working bandwidth, etc., the execution time or the designated manner of the sub-frame, reference may be made to the above example.

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.

Example 2

In this embodiment, a cell handover method is provided, and fig. 7 is a flowchart according to an embodiment of the present invention, as shown in fig. 7, the flowchart includes the following steps:

s702, sending a switching command for indicating the terminal to switch from a source cell to a target cell to the terminal, wherein the switching command carries first time information used for indicating the terminal to use in the source cell and/or second time information used for indicating the terminal to use in the target cell;

s704, communicating with the terminal in the source cell according to the first time information;

s706, when the access of the terminal to the target cell is completed according to the communication in the target cell, the connection with the terminal is disconnected.

Optionally, in this embodiment, the cell handover method may be, but is not limited to, applied to a base station corresponding to a source cell of a cell handover system. Specifically, a base station corresponding to a source cell sends a handover command for instructing a terminal to handover from the source cell to a target cell to the terminal, wherein the handover command carries first time information for instructing the terminal to use in the source cell and/or second time information for instructing the terminal to use in the target cell; the base station corresponding to the source cell communicates with the terminal in the source cell according to the first time information; and when the terminal completes the access of the terminal to the target cell according to the communication in the target cell, the connection with the terminal is disconnected.

Optionally, in this embodiment, before sending, to the terminal, a handover command for instructing the terminal to handover from the source cell to the target cell, the method further includes: configuring a subframe indicated by the first time information in each radio frame and/or a subframe indicated by the second time information in each radio frame in the handover command; and generating a switching command according to the subframe indicated by the first time information and/or the subframe indicated by the second time information.

1) respectively configuring identifiers corresponding to a source cell and/or a target cell on each subframe in each wireless frame, wherein the identifiers are used for indicating whether the subframe is available in the source cell or the target cell;

2) and configuring a subframe allocation mode at a preset bit, wherein the subframe allocation mode is used for indicating a subframe indicated by the first time information in each radio frame and/or indicating a subframe indicated by the second time information in each radio frame.

Optionally, in this embodiment, the subframe configuration manner may include, but is not limited to, at least one of the following:

1) configuring even numbered subframes in each wireless frame as subframes indicated by the first time information, and configuring odd numbered subframes in each wireless frame as subframes indicated by the second time information; or configuring odd subframes in each radio frame as subframes indicated by the first time information, and configuring odd subframes in each radio frame as subframes indicated by the second time information.

2) Configuring even numbered subframes in each wireless frame as subframes indicated by the first time information, and configuring odd numbered subframes in each wireless frame as subframes indicated by the second time information; or configuring odd subframes in each radio frame as subframes indicated by the first time information, and configuring odd subframes in each radio frame as subframes indicated by the second time information.

3) And alternately configuring the subframe indicated by the first time information and/or the subframe indicated by the second time information according to the preset subframe width.

Optionally, in this embodiment, alternately configuring, according to a predetermined subframe width, a subframe indicated by the first time information and a subframe indicated by the second time information includes:

(1) starting from an odd frame of every two wireless frames, alternately configuring subframes indicated by the first time information and/or subframes indicated by the second time information according to a preset subframe width; or

(2) And starting from an even-numbered frame of every two radio frames, alternately configuring the subframe indicated by the first time information and/or the subframe indicated by the second time information according to a preset subframe width.

Optionally, in this embodiment, before sending, to the terminal, a handover command for instructing the terminal to handover from the source cell to the target cell, the method further includes: configuring a predetermined subframe for adjusting a transition parameter in the handover command, wherein the transition parameter comprises at least one of: frequency, bandwidth.

It should be noted that, in this embodiment, when the handover command indicates that the source cell and the target cell are inter-frequency cells or cells with different working bandwidths, corresponding adjustment needs to be performed on the handover parameters in the handover process, for example, frequency conversion or bandwidth adjustment.

Optionally, in this embodiment, the predetermined subframe may include, but is not limited to:

1) a first subframe in subframes indicated by the first time information and the second time information;

2) the last subframe among the subframes indicated by the first time information and the second time information.

The description is made with reference to the example shown in fig. 4:

In the above manner, one indication bit per time unit is required.

As an optional scheme, before sending a handover command to the terminal for instructing the terminal to handover from the source cell to the target cell, the method further includes:

s1, configuring, in the handover command, a subframe indicated by the first time information in each radio frame, and/or a subframe indicated by the second time information in each radio frame;

and S2, generating a switching command according to the subframe indicated by the first time information and/or the subframe indicated by the second time information.

According to the embodiment provided by the application, the terminal is switched from the source cell to the target cell under the condition of uninterrupted service according to the time division multiplexing mode on the corresponding different subframes according to the switching command for generating the subframes configured for the source cell and the target cell respectively, so that the cell switching efficiency is ensured.

As an optional scheme, configuring, in the handover command, a subframe indicated by the first time information in each radio frame, and/or a subframe indicated by the second time information in each radio frame includes:

1) configuring even numbered subframes in each wireless frame as subframes indicated by the first time information, and configuring odd numbered subframes in each wireless frame as subframes indicated by the second time information; or

2) And configuring odd subframes in each wireless frame as subframes indicated by the first time information, and configuring odd subframes in each wireless frame as subframes indicated by the second time information.

1) configuring the first five subframes in each wireless frame as subframes indicated by the first time information, and configuring the last five subframes in each wireless frame as subframes indicated by the second time information; or

2) And configuring the last five subframes in each wireless frame as the subframes indicated by the first time information, and configuring the first five subframes in each wireless frame as the subframes indicated by the second time information.

1) and alternately configuring the subframe indicated by the first time information and/or the subframe indicated by the second time information according to the preset subframe width.

Optionally, in this embodiment, alternately configuring, according to a predetermined subframe width, a subframe indicated by the first time information and/or a subframe indicated by the second time information includes:

s1, configuring a subframe allocation manner at a predetermined bit, wherein the subframe allocation manner is used to indicate the configuration of the subframe indicated by the first time information and/or the subframe indicated by the second time information in each radio frame.

For example, when the predetermined bit indicates 00, the radio frame is indicated to be a subframe configured for the source cell and the target cell in the manner shown in fig. 5; when the predetermined bit indication is 01, indicating that the radio frame is a subframe configured for the source cell and the target cell in a second manner as shown in fig. 5; when the predetermined bit indication is 10, indicating that the radio frame is a subframe configured for the source cell and the target cell in the manner shown in fig. 5; when the predetermined bit indication is 11, it indicates that the radio frame is a subframe configured for the source cell and the target cell in the manner shown in fig. 5.

It should be noted that, as the mode style increases, the number of bits of the predetermined bit may be increased, for example, the predetermined bit of 3 bits is used to indicate 8 configuration modes, and the specific process is the above process, and is not described herein again.

s1, configuring a predetermined subframe for adjusting a transition parameter in the handover command, wherein the transition parameter includes at least one of: frequency, bandwidth.

Example 3

In this embodiment, a cell switching apparatus is further provided, and the apparatus is used to implement the foregoing embodiments and preferred embodiments, and details of which have been already described are omitted. 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. 8 is a block diagram of a cell switching apparatus according to an embodiment of the present invention, and as shown in fig. 8, the apparatus includes:

1) a receiving unit 802, configured to receive a handover command for instructing a terminal to handover from a source cell to a target cell, where the handover command carries first time information used for instructing the terminal to use in the source cell and/or second time information used for instructing the terminal to use in the target cell;

2) a control unit 804, configured to control the terminal to perform communication in the source cell according to the first time information, and control the terminal to perform communication in the target cell according to the second time information;

3) a switching unit 806, configured to determine that the terminal is successfully switched after the terminal completes access to the target cell according to the communication in the target cell.

Optionally, in this embodiment, the cell switching apparatus may be, but is not limited to, applied to a terminal of a cell switching system. Specifically, the terminal receives a handover command for instructing the terminal to handover from a source cell to a target cell, where the handover command carries first time information for instructing the terminal to use in the source cell and/or second time information for instructing the terminal to use in the target cell; the terminal communicates in a source cell according to the first time information and communicates in a target cell according to the second time information; and after the terminal completes the access of the terminal to the target cell according to the communication in the target cell, determining that the terminal is successfully switched.

The description is made with reference to the example shown in fig. 4:

In the above manner, one indication bit per time unit is required.

As an optional scheme, the method further comprises the following steps:

1) and a first obtaining unit, configured to obtain, according to a handover command, a subframe indicated by the first time information in each radio frame and a subframe indicated by the second time information in each radio frame after receiving the handover command instructing the terminal to handover from the source cell to the target cell.

As an optional solution, the first obtaining unit includes:

1) a first obtaining module, configured to obtain a subframe allocation manner indicated by a predetermined bit in a handover command after receiving the handover command for instructing a terminal to handover from a source cell to a target cell;

2) and the second acquisition module is used for acquiring the subframe indicated by the first time information in each radio frame and the subframe indicated by the second time information in each radio frame according to the indicated subframe allocation mode.

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 different processors in any combination.

Example 4

Fig. 9 is a block diagram of a cell switching apparatus according to an embodiment of the present invention, and as shown in fig. 9, the apparatus includes:

1) a sending unit 902, configured to send, to a terminal, a handover command for instructing the terminal to handover from a source cell to a target cell, where the handover command carries first time information used for instructing the terminal to use in the source cell and/or second time information used for instructing the terminal to use in the target cell;

2) a communication unit 904, configured to communicate with a terminal in a source cell according to the first time information;

3) a switching unit 906, configured to disconnect the connection with the terminal after completing the access of the terminal to the target cell according to the communication in the target cell.

Optionally, in this embodiment, the cell switching apparatus may be, but is not limited to, applied to a base station corresponding to a source cell of a cell switching system. Specifically, a base station corresponding to a source cell sends a handover command for instructing a terminal to handover from the source cell to a target cell to the terminal, wherein the handover command carries first time information for instructing the terminal to use in the source cell and/or second time information for instructing the terminal to use in the target cell; the base station corresponding to the source cell communicates with the terminal in the source cell according to the first time information; and when the terminal completes the access of the terminal to the target cell according to the communication in the target cell, the connection with the terminal is disconnected.

1) respectively configuring identifiers corresponding to a source cell and a target cell on each subframe in each wireless frame, wherein the identifiers are used for indicating whether the subframe is available in the source cell or the target cell;

The description is made with reference to the example shown in fig. 4:

In the above manner, one indication bit per time unit is required.

As an optional scheme, the method further comprises the following steps:

1) a first configuration unit, configured to configure, in a handover command, a subframe indicated by the first time information in each radio frame and/or a subframe indicated by the second time information in each radio frame before transmitting the handover command instructing the terminal to handover from the source cell to the target cell to the terminal;

2) and the generating unit is used for generating a switching command according to the subframe indicated by the first time information and/or the subframe indicated by the second time information.

As an alternative, the first configuration unit includes:

1) a first configuration module, configured to configure even subframes in each radio frame as subframes indicated by the first time information, and configure odd subframes in each radio frame as subframes indicated by the second time information; or

2) And the second configuration module is used for configuring the odd subframes in each wireless frame as the subframes indicated by the first time information, and configuring the odd subframes in each wireless frame as the subframes indicated by the second time information.

As an alternative, the first configuration unit includes:

1) a third configuration module, configured to configure the first five subframes in each radio frame as subframes indicated by the first time information, and configure the last five subframes in each radio frame as subframes indicated by the second time information; or

2) And a fourth configuration module, configured to configure the last five subframes in each radio frame as subframes indicated by the first time information, and configure the first five subframes in each radio frame as subframes indicated by the second time information.

As an alternative, the first configuration unit includes:

1) and the fifth configuration module is used for alternately configuring the subframe indicated by the first time information and the subframe indicated by the second time information according to the preset subframe width.

Optionally, in this embodiment, the fifth configuration module includes:

(1) the first configuration submodule is used for alternately configuring the subframe indicated by the first time information and/or the subframe indicated by the second time information from the odd-numbered frame of every two wireless frames according to the preset subframe width; or

(2) And the second configuration submodule is used for alternately configuring the subframe indicated by the first time information and/or the subframe indicated by the second time information according to the preset subframe width from the even numbered frame of every two wireless frames.

As an alternative, the first configuration unit includes:

1) and a sixth configuring module, configured to configure a subframe allocation manner at a predetermined bit, where the subframe allocation manner is used to indicate a configuration of a subframe indicated by the first time information and/or a subframe indicated by the second time information in each radio frame.

As an optional scheme, the method further comprises the following steps:

1) an adjusting unit, configured to configure a predetermined subframe for adjusting a transition parameter in a handover command before sending the handover command for instructing the terminal to handover from the source cell to the target cell to the terminal, wherein the transition parameter includes at least one of: frequency, bandwidth.

It should be noted that, in this embodiment, when the handover command indicates that the source cell and the target cell are inter-frequency cells or cells with different operating bandwidths, it is determined that the handover condition is not satisfied, and the method may be but not limited to perform corresponding adjustment on a handover parameter on a predetermined subframe, for example, performing frequency handover or adjusting bandwidth.

Example 5

In this embodiment, a cell switching system is further provided, which includes a base station and a terminal corresponding to a source cell, wherein,

s1, the base station corresponding to the source cell sends a switching command for indicating the terminal to switch from the source cell to the target cell to the terminal, wherein the switching command carries first time information used for indicating the terminal to use in the source cell and/or second time information used for indicating the terminal to use in the target cell;

s2, the terminal communicates in the source cell according to the first time information and communicates in the target cell according to the second time information;

and S3, when the terminal completes the access of the terminal to the target cell according to the communication in the target cell, the terminal is determined to be successfully switched.

Optionally, in this embodiment, the system further includes a base station corresponding to the target cell, for example, as shown in fig. 10, the cell switching system includes a base station 1002 corresponding to the source cell, a terminal 1004, and a base station 1006 corresponding to the target cell.

Specifically, after receiving the handover command from the base station 1002 corresponding to the source cell, the terminal 1004 performs communication in the source cell according to the first time information in the handover command and performs communication in the target cell according to the second time information in the handover command in a time division multiplexing manner (for example, performs a random access procedure to the target cell). Therefore, before the terminal 1004 is successfully switched to the target cell, the connection between the base station 1002 corresponding to the source cell can be maintained, and meanwhile, the base station 1006 corresponding to the target cell also communicates, so as to ensure that the terminal service is not interrupted, thereby overcoming the problem that in the prior art, when a common terminal or a terminal with low support connection capability is subjected to cell switching, the currently executed terminal service needs to be interrupted, and the switching efficiency is low due to long service interruption time, and further achieving the effect of improving the cell switching efficiency.

Optionally, for a specific example in this embodiment, reference may be made to the example described in the optional implementation manner in embodiment 1 and embodiment 2, and this embodiment is not described again here.

Example 6

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, receiving a handover command for instructing a terminal to handover from a source cell to a target cell, wherein the handover command carries first time information for instructing the terminal to use in the source cell and/or second time information for instructing the terminal to use in the target cell;

s2, the control terminal communicates in the source cell according to the first time information and communicates in the target cell according to the second time information;

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

s1, after receiving a handover command instructing the terminal to handover from the source cell to the target cell, acquiring a subframe indicated by the first time information in each radio frame and a subframe indicated by the second time information in each radio frame according to the handover command.

s1, obtaining the sub-frame distribution mode indicated by the preset bit in the switching command;

and S2, acquiring the subframe indicated by the first time information in each wireless frame and the subframe indicated by the second time information in each wireless frame according to the indicated subframe allocation mode.

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.

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 of cell handover, comprising:

receiving a handover command for instructing a terminal to handover from a source cell to a target cell, wherein the handover command carries first time information for instructing the terminal to use in the source cell and/or second time information for instructing the terminal to use in the target cell;

acquiring a subframe allocation mode indicated by a preset bit in the switching command, and acquiring a subframe indicated by the first time information in each radio frame and a subframe indicated by the second time information in each radio frame according to the indicated subframe allocation mode;

controlling the terminal to communicate in the source cell according to the first time information, and controlling the terminal to communicate in the target cell according to the second time information;

and after the terminal completes the access of the terminal to the target cell according to the communication in the target cell, determining that the terminal is successfully switched.

2. The method of claim 1, wherein the subframe indicated by the first time information comprises: even numbered subframes in each radio frame or odd numbered subframes in each radio frame; the subframe indicated by the second time information comprises: odd subframes in each radio frame or even subframes in each radio frame.

3. The method of claim 1, wherein the subframe indicated by the first time information comprises: the first five subframes in each radio frame or the last five subframes in each radio frame; the subframe indicated by the second time information comprises: the last five subframes in each radio frame or the first five subframes in each radio frame.

4. The method of claim 1, wherein the subframes indicated by the first time information and the subframes indicated by the second time information are alternately configured according to a predetermined subframe width.

5. The method of claim 4, wherein the subframes indicated by the first time information and the subframes indicated by the second time information are alternately configured according to a predetermined subframe width from odd numbered frames of every two radio frames, or wherein the subframes indicated by the first time information and the subframes indicated by the second time information are alternately configured according to the predetermined subframe width from even numbered frames of every two radio frames.

6. The method of claim 4, wherein the predetermined subframe width comprises at least one of: two subframes, four subframes.

7. The method of claim 1, wherein when the handover command carries first time information used for indicating the terminal to use in the source cell, the second time information is determined according to the first time information.

8. The method of claim 1, wherein the controlling the terminal to communicate in the source cell according to the first time information and controlling the terminal to communicate in the target cell according to the second time information comprises:

controlling the terminal to communicate in the source cell on a subframe indicated by the first time information;

and controlling the terminal to execute a random access process to the target cell on the subframe indicated by the second time information.

9. The method of claim 8, wherein the controlling the terminal to perform the random access procedure on the target cell on the subframe indicated by the second time information comprises:

acquiring a target subframe used by the target cell for executing the random access process;

searching the target subframe on the subframe indicated by the second time information;

and sending random access preamble information to the target cell on the target subframe found on the subframe indicated by the second time information, wherein the random access preamble information carries a predetermined identifier configured to the terminal by the target cell.

10. The method of claim 1, wherein after the receiving the handover command for instructing the terminal to handover from the source cell to the target cell, further comprising:

and adjusting the conversion parameters of the terminal in a preset subframe.

11. The method of claim 10, wherein the adjusting the transition parameters of the terminal in a predetermined subframe comprises:

adjusting the conversion parameters of the terminal in the first subframe of the subframes indicated by the first time information and the second time information respectively; or

And adjusting the conversion parameters of the terminal in the last subframe of the subframes indicated by the first time information and the second time information respectively.

12. The method of claim 1, wherein after the accessing of the terminal to the target cell is completed according to the communication in the target cell, further comprising at least one of:

automatically deleting the first time information and/or the second time information in the switching command;

and disconnecting the terminal from the source cell.

13. A method of cell handover, comprising:

configuring a subframe allocation mode indicated by a preset bit in a switching command, and configuring a subframe indicated by first time information in each radio frame and a subframe indicated by second time information in each radio frame according to the indicated subframe allocation mode;

sending the handover command for instructing the terminal to handover from a source cell to a target cell to the terminal, wherein the handover command carries the first time information for instructing the terminal to use in the source cell and/or the second time information for instructing the terminal to use in the target cell; communicating with the terminal in the source cell according to the first time information;

and after the terminal completes the access of the terminal to the target cell according to the communication in the target cell, disconnecting the terminal.

14. The method of claim 13, wherein the subframe indicated by the first time information in each radio frame and/or the subframe indicated by the second time information in each radio frame comprises:

configuring even numbered subframes in each radio frame as subframes indicated by the first time information, and configuring odd numbered subframes in each radio frame as subframes indicated by the second time information; or

Configuring odd numbered subframes in each wireless frame as subframes indicated by the first time information, and configuring odd numbered subframes in each wireless frame as subframes indicated by the second time information.

15. The method of claim 13, wherein the subframe indicated by the first time information in each radio frame and/or the subframe indicated by the second time information in each radio frame comprises:

configuring the first five subframes in each radio frame as the subframes indicated by the first time information, and configuring the last five subframes in each radio frame as the subframes indicated by the second time information; or

And configuring the last five subframes in each radio frame as the subframes indicated by the first time information, and configuring the first five subframes in each radio frame as the subframes indicated by the second time information.

16. The method of claim 13, wherein the subframe indicated by the first time information in each radio frame and/or the subframe indicated by the second time information in each radio frame comprises:

and alternately configuring the subframe indicated by the first time information and/or the subframe indicated by the second time information according to a preset subframe width.

17. The method according to claim 16, wherein the alternating the configuration of the subframe indicated by the first time information and/or the subframe indicated by the second time information according to the predetermined subframe width comprises:

starting from an odd frame of every two radio frames, alternately configuring subframes indicated by the first time information and/or subframes indicated by the second time information according to the preset subframe width; or

And starting from an even frame of every two radio frames, alternately configuring the subframe indicated by the first time information and/or the subframe indicated by the second time information according to the preset subframe width.

18. The method of claim 16, wherein the predetermined subframe width comprises at least one of: two subframes, four subframes.

19. The method of claim 13, wherein before the sending the handover command to the terminal for instructing the terminal to handover from the source cell to the target cell, further comprising:

configuring a predetermined subframe for adjusting a transition parameter in the handover command, wherein the transition parameter comprises at least one of: frequency, bandwidth.

20. A cell switching apparatus, comprising:

a receiving unit, configured to receive a handover command for instructing a terminal to handover from a source cell to a target cell, where the handover command carries first time information used for instructing the terminal to use in the source cell and/or second time information used for instructing the terminal to use in the target cell;

a first obtaining unit, configured to obtain a subframe allocation manner indicated by a predetermined bit in the handover command, and obtain a subframe indicated by the first time information in each radio frame and a subframe indicated by the second time information in each radio frame according to the indicated subframe allocation manner;

a control unit, configured to control the terminal to perform communication in the source cell according to the first time information, and control the terminal to perform communication in the target cell according to the second time information;

and the switching unit is used for determining that the terminal is successfully switched after the terminal completes the access of the terminal to the target cell according to the communication in the target cell.

21. The apparatus of claim 20, wherein the subframe indicated by the first time information comprises: even numbered subframes in each radio frame or odd numbered subframes in each radio frame; the subframe indicated by the second time information comprises: odd subframes in each radio frame or even subframes in each radio frame.

22. The apparatus of claim 20, wherein the subframe indicated by the first time information comprises: the first five subframes in each radio frame or the last five subframes in each radio frame; the subframe indicated by the second time information comprises: the last five subframes in each radio frame or the first five subframes in each radio frame.

23. The apparatus of claim 20, wherein the subframes indicated by the first time information and the subframes indicated by the second time information are alternately configured according to a predetermined subframe width.

24. The apparatus of claim 23, wherein the subframes indicated by the first time information and the subframes indicated by the second time information are alternately configured according to a predetermined subframe width from odd numbered frames of every two radio frames, or wherein the subframes indicated by the first time information and the subframes indicated by the second time information are alternately configured according to the predetermined subframe width from even numbered frames of every two radio frames.

25. The apparatus of claim 23, wherein the predetermined subframe width comprises at least one of: two subframes, four subframes.

26. A cell switching apparatus, comprising:

a first configuration unit, configured to configure a subframe allocation manner indicated by a predetermined bit in a handover command, configure a subframe indicated by first time information in each radio frame according to the indicated subframe allocation manner, and configure a subframe indicated by second time information in each radio frame;

a sending unit, configured to send a handover command to a terminal, where the handover command carries first time information used to indicate that the terminal is in the source cell and/or second time information used to indicate that the terminal is in the target cell;

a communication unit, configured to communicate with the terminal in the source cell according to the first time information;

and the switching unit is used for disconnecting the connection with the terminal after the terminal completes the access of the terminal to the target cell according to the communication in the target cell.

27. The apparatus of claim 26, wherein the first configuration unit comprises:

a first configuring module, configured to configure even subframes in each radio frame as subframes indicated by the first time information, and configure odd subframes in each radio frame as subframes indicated by the second time information; or

A second configuring module, configured to configure odd subframes in each radio frame as subframes indicated by the first time information, and configure odd subframes in each radio frame as subframes indicated by the second time information.

28. The apparatus of claim 26, wherein the first configuration unit comprises:

a third configuring module, configured to configure the first five subframes in each radio frame as subframes indicated by the first time information, and configure the last five subframes in each radio frame as subframes indicated by the second time information; or

A fourth configuring module, configured to configure the last five subframes in each radio frame as subframes indicated by the first time information, and configure the first five subframes in each radio frame as subframes indicated by the second time information.

29. The apparatus of claim 26, wherein the first configuration unit comprises:

and a fifth configuration module, configured to alternately configure, according to a predetermined subframe width, a subframe indicated by the first time information and a subframe indicated by the second time information.

30. The apparatus of claim 29, wherein the fifth configuration module comprises:

a first configuration submodule, configured to alternately configure, starting from an odd-numbered frame of every two radio frames, a subframe indicated by the first time information and/or a subframe indicated by the second time information according to the predetermined subframe width; or

And the second configuration submodule is used for alternately configuring the subframe indicated by the first time information and/or the subframe indicated by the second time information according to the preset subframe width from the even numbered frame of every two wireless frames.

31. The apparatus of claim 30, wherein the predetermined subframe width comprises at least one of: two subframes, four subframes.

32. The apparatus of claim 26, further comprising:

an adjusting unit, configured to configure a predetermined subframe for adjusting a transition parameter in a handover command before the handover command for instructing the terminal to handover from a source cell to a target cell is sent to the terminal, wherein the transition parameter includes at least one of: frequency, bandwidth.

33. A cell switching system comprises a base station and a terminal corresponding to a source cell, and is characterized in that,

a base station corresponding to the source cell sends a switching command for indicating the terminal to switch from the source cell to a target cell to the terminal, wherein the switching command carries first time information used for indicating the terminal to use in the source cell and/or second time information used for indicating the terminal to use in the target cell;

the terminal acquires a subframe allocation mode indicated by a preset bit in the switching command, acquires a subframe indicated by the first time information in each wireless frame and a subframe indicated by the second time information in each wireless frame according to the indicated subframe allocation mode;

the terminal communicates in the source cell according to the first time information and communicates in the target cell according to the second time information;

and when the terminal completes the access of the terminal to the target cell according to the communication in the target cell, determining that the terminal is successfully switched.