CN111479288A

CN111479288A - Cell switching method and system

Info

Publication number: CN111479288A
Application number: CN201910065195.0A
Authority: CN
Inventors: 常永东
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2019-01-23
Filing date: 2019-01-23
Publication date: 2020-07-31
Anticipated expiration: 2039-01-23
Also published as: CN111479288B

Abstract

The embodiment of the invention provides a cell switching method and a cell switching system, relates to the technical field of communication, and comprises the steps of extracting cache data volume from cache state reports when the cache state reports continuously sent by a mobile terminal are received, counting the number of the cache state reports, sending RRC reconfiguration information to the mobile terminal when the number is larger than a preset report number threshold value and the cache data volume of each cache state report is larger than a preset cache data volume threshold value, wherein the RRC reconfiguration information carries a switching threshold value, and the mobile terminal performs cell switching according to the switching threshold value.

Description

Cell switching method and system

Technical Field

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

Background

In a 4 th generation mobile communication network, two standards of TD-L TE (Time Division L ong TermEvolution) and FDD-L0 TE (Frequency Division duplex Dual L1 ong TermEvolution) exist, wherein TD-L TE transmits an uplink signal and a downlink signal respectively in different Time slots on the same Frequency band, and FDD-L TE transmits the uplink signal and the downlink signal respectively on two symmetrical Frequency channels, so that the uplink signal quality of FDD-L TE is better than that of TD-L TE for the same bandwidth, and at the moment, the mobile terminal can be switched from a TD-L TE cell to an FDD-L TE cell under a TD-L TE and FDD-L TE fusion networking scene.

In the prior art, two switching schemes exist, the first scheme is based on coverage switching and comprises the steps that firstly, a mobile terminal measures RSRP (reference signal Receiving Power) received from base stations corresponding to a TD-L TE cell and a plurality of candidate FDD-L TE cells, then, if the RSRP of the TD-L0 TE cell is smaller than a certain threshold value, an FDD-L TE cell with the largest RSRP is selected from the candidate FDD-L TE cells, and finally, the mobile terminal is switched to the FDD-L TE cell, the second scheme is based on load balancing switching and comprises the steps of firstly, respectively calculating the ratio of PRB (Physical Resource Block) and the number of cell users of the TD-L TE cell and the FDD-L TE cell, and then, if the ratio of the TD-L TE cell is larger than a certain threshold value, switching the TD-L TE cell to the FDD-L TE cell according to the difference of the ratio of the FDD-L TE cell and the cell users, and then, switching the TD-L TE cell to L.

However, the above two schemes cannot identify the large data volume service, and cannot accurately switch the mobile terminal performing the large data volume service from the TD-L TE cell to the FDD-L TE cell, so that the quality of the large data volume service cannot be ensured.

Disclosure of Invention

In view of the above, the present invention is proposed to provide a cell handover method and system that overcomes or at least partially solves the above mentioned problems.

According to an aspect of the present invention, there is provided a cell handover method, the method including:

under the condition of receiving cache state reports continuously sent by the mobile terminal, extracting cache data volume from the cache state reports, and counting the number of the cache state reports;

and sending RRC reconfiguration information to the mobile terminal under the condition that the number is greater than a preset report number threshold value and the cache data volume of each cache state report is greater than a preset cache data volume threshold value, wherein the RRC reconfiguration request carries a switching threshold value, and the mobile terminal performs cell switching according to the switching threshold value.

Optionally, the performing cell handover according to the handover threshold includes:

determining a reference parameter aiming at a target cell adopted by cell switching;

and under the condition that the reference parameter is larger than the switching threshold value, switching the mobile terminal from the cell corresponding to the base station to the target cell.

Optionally, the determining a reference parameter for a target cell used for cell handover, where the handover threshold is a reference signal received power threshold, and the reference parameter is a reference signal received power, includes:

sending a channel test request to a target base station corresponding to the target cell;

receiving a reference signal sent by the target base station to the mobile terminal;

and calculating the power of the reference signal received by the mobile terminal to obtain the reference signal receiving power.

Optionally, the method further comprises:

and under the condition that the number is less than or equal to a preset report number threshold value, or the cache data volume of at least one cache state report is less than or equal to a preset cache data volume threshold value, allocating wireless resources to the mobile terminal according to the cache data volume so as to transmit data corresponding to the cache data volume.

Optionally, the uplink transmission quality of the base station is better than that of the target base station, the base station is a TD-L TE base station, and the target base station is an FDD-L TE base station.

Optionally, the buffer status report is for buffer data transmitted in real time.

According to another aspect of the present invention, there is provided a cell switching system, the system comprising a base station and a mobile terminal, the base station comprising:

the buffer status report processing module is used for extracting buffer data volume from the buffer status reports and counting the number of the buffer status reports under the condition of receiving the buffer status reports continuously sent by the mobile terminal;

the RRC reconfiguration module is used for sending RRC reconfiguration information to the mobile terminal under the condition that the number is greater than a preset report number threshold value and the cache data volume of each cache state report is greater than a preset cache data volume threshold value, wherein the RRC reconfiguration request carries a switching threshold value;

the mobile terminal includes:

and the switching module is used for carrying out cell switching according to the switching threshold value.

Optionally, the switching module includes:

the reference parameter determining submodule is used for determining a reference parameter which is adopted by cell switching and aims at a target cell;

and the target cell switching submodule is used for switching the mobile terminal from the cell corresponding to the base station to the target cell under the condition that the reference parameter is greater than the switching threshold value.

Optionally, the handover threshold is a reference signal received power threshold, the reference parameter is a reference signal received power, and the reference parameter determining sub-module includes:

a channel test request unit, configured to send a channel test request to a target base station corresponding to the target cell;

a reference signal receiving unit, configured to receive a reference signal sent by the target base station to the mobile terminal;

and the reference signal receiving power receiving unit is used for calculating the power of the reference signal received by the mobile terminal to obtain the reference signal receiving power.

Optionally, the base station further includes:

and the wireless resource allocation module is used for allocating wireless resources to the mobile terminal according to the cache data volume to transmit data corresponding to the cache data volume when the number is less than or equal to a preset report number threshold value or the cache data volume of at least one cache state report is less than or equal to a preset cache data volume threshold value.

The embodiment of the invention has the following advantages:

the method comprises the steps of extracting cache data volume from cache state reports under the condition that the cache state reports continuously sent by a mobile terminal are received, counting the number of the cache state reports, and sending RRC reconfiguration information to the mobile terminal under the condition that the number is larger than a preset report number threshold value and the cache data volume of each cache state report is larger than a preset cache data volume threshold value, wherein the RRC reconfiguration request carries a switching threshold value, and the mobile terminal performs cell switching according to the switching threshold value.

The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a flowchart illustrating a first step of a cell handover method according to a first embodiment of the present invention;

fig. 2 is a flowchart illustrating the steps of a second embodiment of a cell handover method according to the present invention;

fig. 3 shows a block diagram of a third embodiment of a cell switching system according to the present invention;

fig. 4 shows a block diagram of a fourth embodiment of a cell switching system according to the present invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

Example one

Referring to fig. 1, a flowchart illustrating a first step of a cell handover method according to a first embodiment of the present invention is shown, which may specifically include the following steps:

step 101, under the condition of receiving the buffer status reports continuously sent by the mobile terminal, extracting the buffer data volume from the buffer status reports, and counting the number of the buffer status reports.

The embodiment of the invention is suitable for application scenes that the mobile terminal transmits big data to the base station, such as transmitting big videos, big files and the like. In practical application, before the mobile terminal transmits big data, firstly, the big data to be transmitted is added to a data cache region of the mobile terminal; then, sending a buffer status report of the data buffer area to the base station; and finally, after receiving the wireless resource allocated by the base station according to the buffer status report, transmitting the big data to the base station from the data buffer area.

The buffer status report is sent by the mobile terminal to the base station, and is used to indicate buffer data information that needs to be sent, such as buffer data amount.

It can be understood that when the mobile terminal needs to continuously transmit data for a plurality of times within a certain time period, the buffer status report needs to be sent to the base station for a plurality of times.

It should be noted that, when the mobile terminal is located in the cell range corresponding to the base station, the time interval between the continuously transmitted buffer status reports is less than or equal to a preset time threshold.

It can be understood that the time threshold may be set according to an actual application scenario, and the embodiment of the present invention does not limit the time threshold.

And 102, sending RRC reconfiguration information to the mobile terminal under the condition that the number is greater than a preset report number threshold value and the cache data amount of each cache state report is greater than a preset cache data amount threshold value, wherein the RRC reconfiguration request carries a switching threshold value, and the mobile terminal performs cell switching according to the switching threshold value.

The report number threshold and the buffer data amount threshold can be preset and stored in the base station side. It can be understood that both the report number threshold and the buffer data amount threshold may be set according to an actual application scenario, and the embodiment of the present invention does not limit the thresholds.

RRC (Radio Resource Control) reconfiguration information may be used to Control reconfiguration of Radio resources. In the embodiment of the present invention, the handover threshold may be carried in the RRC reconfiguration message to perform cell handover.

The switching threshold is used for determining whether to switch, and when the reference parameter measured by the mobile terminal is greater than or equal to the switching threshold, switching is carried out; and when the reference parameter measured by the mobile terminal is smaller than the switching threshold value, not switching.

It can be understood that when the number is less than or equal to the report number threshold, or the buffer data amount of at least one buffer status report is less than or equal to the buffer data amount threshold, it indicates that the uplink data amount sent by the mobile terminal is normal, and the uplink quality will not be degraded, and at this time, the RRC reconfiguration command does not need to be sent, i.e., cell handover does not need to be performed.

The embodiment of the invention provides a cell switching method which comprises the steps of extracting cache data volume from cache state reports and counting the number of the cache state reports when the cache state reports continuously sent by a mobile terminal are received, sending RRC reconfiguration information to the mobile terminal when the number is larger than a preset report number threshold and the cache data volume of each cache state report is larger than a preset cache data volume threshold, wherein the RRC reconfiguration request carries a switching threshold, and the mobile terminal carries out cell switching according to the switching threshold.

Example two

Referring to fig. 2, a flowchart illustrating a step of a second embodiment of a cell handover method according to the present invention is shown, which may specifically include the following steps:

step 201, the base station extracts the amount of the buffer data from the buffer status report and counts the number of the buffer status reports when receiving the buffer status reports continuously sent by the mobile terminal, wherein the buffer status reports are for the buffer data transmitted in real time.

This step can refer to the detailed description of step 101, and is not described herein again.

Step 202, the base station sends RRC reconfiguration information to the mobile terminal when the number is greater than a preset report number threshold and the buffer data amount of each buffer status report is greater than a preset buffer data amount threshold, where the RRC reconfiguration request carries a handover threshold.

This step can refer to the detailed description of step 102, and is not described herein again.

In step 203, the mobile terminal determines a reference parameter for the target cell used for cell handover.

The reference parameter can indicate the signal receiving quality of the mobile terminal to the target cell, and the higher the signal receiving quality is, the larger the reference parameter is; the lower the signal reception quality, the smaller the reference parameter.

Optionally, in another embodiment of the present invention, the switching threshold is a reference signal received power threshold, the reference parameter is a reference signal received power, and the step 203 includes sub-steps 2031 to 2033:

substep 2031, sending a channel test request to the target base station corresponding to the target cell.

Wherein the channel test request is used to test the radio channel quality of the target base station to determine a reference parameter (e.g., reference signal received power).

The reference signal received power threshold may be set according to an actual application scenario, and is not limited in the embodiment of the present invention.

Optionally, in another embodiment of the present invention, the uplink transmission quality of the base station is better than that of the target base station, the base station is a TD-L TE base station, and the target base station is an FDD-L TE base station.

For example, the mobile terminal is switched from a TD-L TE cell (corresponding to a TD-L TE base station) to an FDD-L TE cell (corresponding to an FDD-L TE base station), so that the quality of big data transmission can be effectively ensured.

Sub-step 2032, receiving the reference signal sent by the target base station to the mobile terminal.

When the base station receives the channel test request, the base station transmits a reference signal to the mobile terminal. The reference signal may or may not contain simple character information. The reference signals are typically small to conserve channel resources.

Substep 2033, calculating the power of the reference signal received by the mobile terminal to obtain the reference signal received power.

Wherein, the reference signal power is an average value of signal powers received on all subcarriers carrying the reference signal within a certain symbol.

The embodiment of the invention can accurately determine the channel quality according to the reference signal receiving power, thereby ensuring that the accuracy of cell switching is higher.

Step 204, under the condition that the reference parameter is greater than the handover threshold, handing over the mobile terminal from the cell corresponding to the base station to the target cell.

It is to be appreciated that when the reference parameter is less than or equal to the handover threshold, the mobile terminal is not handed over to the target cell.

In the embodiment of the invention, the reference parameter is the reference signal received power, and the switching threshold is the reference signal received power threshold. Thereby, it is possible to obtain: when the reference signal receiving power is larger than the reference signal receiving power threshold value, the mobile terminal is switched to a target cell; when the reference signal received power is less than or equal to the reference signal received power threshold, the mobile terminal is not handed over to the target cell.

The embodiment of the invention can accurately switch the cell by referring to the parameter and the switching threshold value.

Step 205, when the number is less than or equal to a preset report number threshold, or the buffer data amount of at least one of the buffer status reports is less than or equal to a preset buffer data amount threshold, allocating a radio resource to the mobile terminal according to the buffer data amount to transmit data corresponding to the buffer data amount.

It is understood that when the number is less than or equal to the report number threshold, or the amount of buffered data of at least one of the buffered status reports is less than or equal to the buffered data amount threshold, the amount of data to be transmitted by the mobile terminal is smaller. According to the embodiment of the invention, when the transmission data volume of the mobile terminal is small, transmission preparation is prepared, so that the cache data to be transmitted can be transmitted.

For simplicity of explanation, the method embodiments are described as a series of acts or combinations, but those skilled in the art will appreciate that the embodiments are not limited by the order of acts described, as some steps may occur in other orders or concurrently with other steps in accordance with the embodiments of the invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.

EXAMPLE III

Referring to fig. 3, a block diagram illustrating a third embodiment of a cell switching system according to the present invention, where the system includes a base station 301 and a mobile terminal 302, and the base station 301 includes:

the buffer status report processing module 3011, configured to, in a case that buffer status reports continuously sent by the mobile terminal are received, extract a buffer data amount from the buffer status reports, and count the number of the buffer status reports;

the RRC reconfiguration module 3012 is configured to send RRC reconfiguration information to the mobile terminal when the number is greater than a preset report number threshold and the buffer data amount reported by each buffer state is greater than a preset buffer data amount threshold, where the RRC reconfiguration request carries a handover threshold.

The mobile terminal 302 includes:

a handover module 3021, configured to perform cell handover according to the handover threshold.

The embodiment of the invention provides a cell switching system, which comprises a base station and a mobile terminal, and is characterized in that the base station comprises a buffer state report processing module used for extracting buffer data volume from the buffer state reports and counting the number of the buffer state reports when the buffer state reports continuously sent by the mobile terminal are received, and an RRC reconfiguration module used for sending RRC reconfiguration information to the mobile terminal when the number is greater than a preset report number threshold and the buffer data volume of each buffer state report is greater than a preset buffer data volume threshold, wherein the RRC reconfiguration request carries a switching threshold, and the mobile terminal comprises a switching module used for carrying out cell switching according to the switching threshold.

The detailed description of the embodiment of the apparatus corresponding to the first embodiment of the method may refer to the first embodiment, and will not be repeated herein.

Example four

Referring to fig. 4, a block diagram illustrating a fourth embodiment of a cell switching system according to the present invention, the system includes a base station 401 and a mobile terminal 402, where the base station 401 includes:

the buffer status report processing module 4011 is configured to, in a case that buffer status reports continuously sent by the mobile terminal are received, extract a buffer data amount from the buffer status reports, and count the number of the buffer status reports, where the buffer status reports are for buffer data transmitted in real time.

The RRC reconfiguration module 4012 is configured to send RRC reconfiguration information to the mobile terminal when the number is greater than a preset report number threshold and the buffer data amount of each buffer status report is greater than a preset buffer data amount threshold, where the RRC reconfiguration request carries a handover threshold.

A radio resource allocation module 4013, configured to allocate radio resources to the mobile terminal according to the buffer data amount when the number is less than or equal to a preset report number threshold, or the buffer data amount of at least one of the buffer status reports is less than or equal to a preset buffer data amount threshold, so as to transmit data corresponding to the buffer data amount.

The mobile terminal 402 includes:

a handover module 4021, configured to perform cell handover according to the handover threshold; optionally, in this embodiment of the present invention, the switching module 4021 includes:

the reference parameter determining sub-module 40211 is configured to determine a reference parameter for the target cell, which is used for cell handover.

The target cell switching sub-module 40212 is configured to switch the mobile terminal from the cell corresponding to the base station to the target cell when the reference parameter is greater than the switching threshold.

Optionally, in another embodiment of the present invention, the handover threshold is a reference signal received power threshold, the reference parameter is reference signal received power, and the reference parameter determining sub-module 40211 includes:

The second embodiment of the method corresponds to the second embodiment of the apparatus, and the detailed description thereof can refer to the second embodiment, which is not repeated herein.

For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.

The algorithms and displays presented herein are not inherently related to any particular computer, virtual machine, or other apparatus. Various general purpose systems may also be used with the teachings herein. The required structure for constructing such a system will be apparent from the description above. Moreover, the present invention is not directed to any particular programming language. It is appreciated that a variety of programming languages may be used to implement the teachings of the present invention as described herein, and any descriptions of specific languages are provided above to disclose the best mode of the invention.

In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.

Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.

The various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. It will be appreciated by those skilled in the art that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components in a cell switching apparatus according to embodiments of the present invention. The present invention may also be embodied as apparatus or device programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present invention may be stored on computer-readable media or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.

Claims

1. A cell switching method is applied to a base station, and is characterized in that the method comprises the following steps:

2. The method of claim 1, wherein the performing the cell handover according to the handover threshold comprises:

3. The method of claim 2, wherein the handover threshold is a reference signal received power threshold, the reference parameter is a reference signal received power, and the determining the reference parameter for the target cell for cell handover comprises:

4. The method of claim 1, further comprising:

5. The method of claim 3, wherein the uplink transmission quality of the base station is better than that of the target base station, and wherein the base station is TD-L TE base station and the target base station is FDD-L TE base station.

6. The method of claim 1, wherein the buffer status report is for buffer data transmitted in real time.

7. A cell switching system, the system comprising a base station and a mobile terminal, wherein the base station comprises:

the mobile terminal includes:

8. The system of claim 7, wherein the switching module comprises:

9. The system of claim 8, wherein the handover threshold is a reference signal received power threshold, the reference parameter is a reference signal received power, and the reference parameter determination sub-module comprises:

10. The system of claim 7, wherein the base station further comprises:

11. The system of claim 9, wherein the uplink transmission quality of the base station is better than that of the target base station, and wherein the base station is TD-L TE base station and the target base station is FDD-L TE base station.

12. The system of claim 7, wherein the buffer status report is for buffer data transmitted in real time.