CN110366218B - Cell switching method and device - Google Patents
Cell switching method and device Download PDFInfo
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- CN110366218B CN110366218B CN201810322560.7A CN201810322560A CN110366218B CN 110366218 B CN110366218 B CN 110366218B CN 201810322560 A CN201810322560 A CN 201810322560A CN 110366218 B CN110366218 B CN 110366218B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/04—Reselecting a cell layer in multi-layered cells
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Abstract
The embodiment of the invention provides a method and a device for cell switching, wherein the method comprises the following steps: receiving a measurement report sent by a terminal; generating a list of candidate handover cells based on the measurement report; acquiring the cell user average rate of the cell with the maximum field strength in the candidate switching cell list; judging whether the average speed of the cell users meets a first preset condition or not; if yes, acquiring a coverage threshold of the cell; judging whether the coverage threshold of the cell meets a second preset condition or not; if so, taking the cell as a target cell for the terminal switching; sending a cell switching command to the terminal; and the terminal is used for switching to the target cell according to the cell switching command. The embodiment of the invention avoids the problem of sudden drop of the terminal transmission rate after switching caused by disordered transmission, more users or other hidden faults of the switched target cell, also avoids the problem that the terminal transmission rate after switching suddenly drops and cannot be recovered for a long time, and improves the user perception.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a cell switching method and a cell switching apparatus.
Background
With the development of communication networks, the data transmission rate requirements become higher and higher. Handover is an important function in wireless network resources and has a significant impact on the performance of the network. The good switching algorithm can select a more appropriate network for the user, and not only can provide seamless connection for the user, but also can provide better service quality. The larger the capacity of the network, the more traffic classes, the more factors are considered in the handover to meet the QoS (Quality of Service) requirements of different services.
Currently, the most commonly used handover in mobile communication networks is coverage-based handover, which mainly includes three phases, namely handover measurement, handover decision and handover execution.
In the measurement stage, UE performs relevant measurement according to a measurement configuration message issued by an eNodeB, reports a measurement result to the eNodeB when the quality of a received signal of a certain cell exceeds a moving threshold, and ENB adds the measurement result to a target or candidate cell list; and in the decision stage, the eNodeB evaluates according to the measurement result reported by the UE and the coverage threshold configured on the network side to determine whether to trigger the switching. And in the execution stage, the eNodeB issues a switching command to control the UE to be switched to the target cell according to the decision result, and the UE completes the switching.
The switching based on coverage is based on the cell field intensity measured by a terminal, only the level conditions of the cell and a target cell are considered, whether hidden dangers exist in the target cell or not is ignored, for example, the target cell has transmission disorder, transmission hidden faults, a large number of users and the like, so that the uplink and downlink rates drop suddenly after users are switched to the target cell, the rates cannot be recovered for a long time, and the user perception is extremely deteriorated.
Disclosure of Invention
In view of the foregoing problems, embodiments of the present invention provide a cell handover method and a corresponding cell handover apparatus.
In order to solve the above problem, an embodiment of the present invention discloses a method for cell handover, including:
receiving a measurement report sent by a terminal;
generating a list of candidate handover cells based on the measurement report;
acquiring the cell user average rate of the cell with the maximum field strength in the candidate switching cell list;
judging whether the average speed of the cell users meets a first preset condition or not;
if yes, acquiring a coverage threshold of the cell;
judging whether the coverage threshold of the cell meets a second preset condition or not;
if so, taking the cell as a target cell for the terminal switching;
sending a cell switching command to the terminal; and the terminal is used for switching to the target cell according to the cell switching command.
Preferably, the step of obtaining the average rate of the cell users of the cell with the highest field strength in the candidate handover cell list includes:
acquiring the cell type of the cell;
if the cell is an intra-station cell, acquiring the cell user average rate of the intra-station cell;
and if the cell is an inter-station cell, acquiring the average rate of cell users of the cell through X2 interactive messages.
Preferably, the step of determining whether the average rate of the cell users meets a first preset condition includes:
judging whether the average speed of the cell users is greater than a preset minimum cell user average speed or not;
the step of judging whether the coverage threshold of the cell meets a second preset condition comprises:
and judging whether the field intensity of the cell is greater than a preset threshold value of a service cell.
Preferably, the method further comprises:
and if the average speed of the cell users does not meet a first preset condition, deleting the cell from the candidate handover cell list.
Preferably, the method further comprises:
and if the coverage threshold of the cell does not meet a second preset condition, deleting the cell from the candidate handover cell list.
Preferably, the cell user average rate includes a cell uplink user average rate, and/or a cell downlink user average rate.
Correspondingly, the embodiment of the invention discloses a device for cell switching, which comprises:
the receiving module is used for receiving a measurement report sent by a terminal;
a first generating module for generating a candidate handover cell list based on the measurement report;
a first obtaining module, configured to obtain a cell user average rate of a cell with a largest field strength in the candidate handover cell list;
a first judging module, configured to judge whether the average rate of the cell users meets a first preset condition;
a second obtaining module, configured to obtain a coverage threshold of the cell;
a second judging module, configured to judge whether a coverage threshold of the cell meets a second preset condition;
a determining module, configured to use the cell as a target cell for the terminal handover;
a sending module, configured to send a cell switching command to the terminal; and the terminal is used for switching to the target cell according to the cell switching command.
Preferably, the first obtaining module includes:
a cell type obtaining submodule for obtaining the cell type of the cell;
an intra-station cell obtaining submodule, configured to obtain a cell user average rate of an intra-station cell if the cell is the intra-station cell;
and the inter-station cell acquisition submodule is used for acquiring the average rate of cell users of the cell through X2 interactive messages if the cell is the inter-station cell.
Preferably, the first judging module includes:
the rate judgment submodule is used for judging whether the average rate of the cell users is greater than the preset average rate of the users in the lowest cell;
the second judging module includes:
and the field intensity judgment submodule is used for judging whether the field intensity of the cell is greater than a preset threshold value of a service cell.
Preferably, the device further comprises:
and the deleting module is used for deleting the cell from the candidate handover cell list if the average speed of the cell users does not meet a first preset condition.
Preferably, the deleting module is further configured to delete the cell from the candidate handover cell list if the coverage threshold of the cell does not satisfy a second preset condition.
Preferably, the cell user average rate includes a cell uplink user average rate, and/or a cell downlink user average rate.
The embodiment of the invention has the following advantages:
in the embodiment of the invention, after receiving a measurement report sent by a terminal, a base station generates a candidate switching cell list based on the measurement report, acquires the cell user average rate of a cell with the maximum field strength in the candidate switching cell list, then judges whether the cell user average rate meets a first preset condition, if so, acquires the coverage threshold of the cell, then judges whether the coverage threshold of the cell meets a second preset condition, if so, takes the cell as a target cell for terminal switching, and finally sends a cell switching command to the terminal; and the terminal is used for switching to the target cell according to the cell switching command. Therefore, the transmission rate of the target cell is acquired before the terminal is switched to the target cell, so that the problem that the transmission rate of the switched terminal suddenly drops due to transmission disorder, more users or other invisible faults of the switched target cell is avoided, the problem that the transmission rate of the switched terminal suddenly drops and cannot be restored for a long time after switching is also avoided, and the use perception of the user is improved.
Drawings
FIG. 1 is a flowchart illustrating the steps of an embodiment of a method for cell handover in accordance with the present invention;
fig. 2 is a block diagram of an embodiment of a cell switching apparatus according to the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1, a flowchart illustrating steps of an embodiment of a cell handover method according to the present invention is shown, which may specifically include the following steps:
in the embodiment of the present invention, the terminal may have the following characteristics:
(1) on a hardware architecture, a device has a central processing unit, a memory, an input unit and an output unit, that is, the device is often a microcomputer device having a communication function. In addition, various input modes such as a keyboard, a mouse, a touch screen, a microphone, a camera and the like can be provided, and input can be adjusted as required. Meanwhile, the equipment often has a plurality of output modes, such as a telephone receiver, a display screen and the like, and can be adjusted according to needs;
(2) on a software system, the device must have an operating system, such as Windows Mobile, Symbian, Palm, Android, iOS, and the like. Meanwhile, the operating systems are more and more open, and personalized application programs developed based on the open operating system platforms are infinite, such as a communication book, a schedule, a notebook, a calculator, various games and the like, so that the requirements of personalized users are met to a great extent;
(3) in terms of communication capacity, the device has flexible access mode and high-bandwidth communication performance, and can automatically adjust the selected communication mode according to the selected service and the environment, thereby being convenient for users to use. The device can support GSM (Global System for Mobile Communication), WCDMA (Wideband Code Division Multiple Access), CDMA2000(Code Division Multiple Access), TDSCDMA (Time Division-Synchronous Code Division Multiple Access), Wi-Fi (WIreless-Fidelity), WiMAX (world Interoperability for Microwave Access), etc., thereby adapting to various systems of networks, not only supporting voice service, but also supporting various WIreless data services;
(4) in the aspect of function use, the equipment focuses more on humanization, individuation and multi-functionalization. With the development of computer technology, devices enter a human-centered mode from a device-centered mode, and the embedded computing, control technology, artificial intelligence technology, biometric authentication technology and the like are integrated, so that the human-oriented purpose is fully embodied. Due to the development of software technology, the equipment can be adjusted and set according to individual requirements, and is more personalized. Meanwhile, the device integrates a plurality of software and hardware, and the function is more and more powerful.
In practical application, before sending a measurement report to a base station, a terminal receives a measurement configuration message sent by the base station to perform related measurement, where the measurement configuration message mainly includes parameters such as an object, a cell list, a reporting mode, a measurement identifier, and an event parameter measured by a UE (User Equipment).
If the UE finds an A3, a4, or a5 event through measurement, the cell received signal strength satisfying the condition is reported to the eNB (Evolved Node B, i.e., base station) through a measurement report in the form of A3, a4, or a 5.
The LTE (Long Term Evolution) measurement events mainly include the following: event A1, Event A2, Event A3, Event A4, Event A5, Event B1, and Event B2.
Event a1(Serving belows better than threshold): the quality of the signal of the service cell is higher than a certain threshold, and when the event meeting the condition is reported, the eNodeB stops the measurement of the different frequency/different system; similar to 2F events in UMTS (Universal Mobile Telecommunications System); UMTS is a third generation (3G) mobile phone technology, among others. It uses WCDMA as the underlying standard, and is shaped by 3GPP, representing the response of europe to ITUIMT-2000 for the requirements of 3G cellular radio systems. UMTS is also sometimes called 3GSM emphasizing that 3G technology is incorporated and is a successor to the GSM standard. The UMTS packet-switched system has evolved from the GPRS system, so the architecture of the system is quite similar.
Event a2(Serving belongings word threshold): when the signal quality of the serving cell is lower than a certain threshold and an event meeting the condition is reported, the eNodeB starts the measurement of the pilot frequency/the pilot system; similar to 2D events within UMTS;
event A3 (neighbor books offset better than serving): the quality of the same-frequency adjacent cell is higher than that of the service cell, and when an event meeting the condition is reported, the source eNodeB starts a same-frequency switching request;
event A4 (neighbor books between the threshold): the quality of the pilot frequency adjacent cell is higher than a certain threshold, and when an event meeting the condition is reported, the source eNodeB starts a pilot frequency switching request;
event A5(Serving boiler threshold1and neighbor boiler threshold 2): indicating that the quality of the service cell is lower than a certain threshold and the quality of the adjacent cell is higher than a certain threshold; similar to 2B events in UMTS;
event B1(Inter RAT neighbor tables greater than threshold): the quality of the adjacent cell of the different system is higher than a certain threshold, and when the condition event is reported, the source eNodeB starts a different system switching request; similar to the 3C event in UMTS;
event B2(Serving belows word threshold1and inter RAT neighbor books threshold 2): indicating that the quality of the serving cell is below a certain threshold and the quality of the neighbor cells of the inter-system is above a certain threshold, similar to the 3A event for inter-system handover in UMTS.
102, generating a candidate switching cell list based on the measurement report;
in practical applications, a UE can detect multiple neighboring cells, and then receive field strength signals of the multiple neighboring cells, so if the UE detects that the field strength signals of the multiple neighboring cells satisfy the conditions of the A3, a4, or a5 event, the field strength signals are recorded in a measurement report at the same time. Therefore, after receiving the measurement report sent by the terminal, the base station may obtain all neighboring cells satisfying the handover condition of the terminal from the measurement report, and generate a candidate handover cell list including all neighboring cells satisfying the handover condition.
specifically, after generating the candidate handover cell list, the base station may start to continue detecting from the candidate handover cell with the largest field strength, and after detecting the cell, continue to detect other candidate handover cells according to the field strength, and so on.
In a preferred embodiment of the present invention, the cell user average rate includes a cell uplink user average rate, and/or a cell downlink user average rate. In practical application, the average rate of the cell users may be the average rate of the cell uplink users, the average rate of the cell downlink users, or both the average rate of the cell uplink users and the average rate of the cell downlink users.
The method for calculating the downlink average rate of the cell users comprises the following steps: (Qci (QoS Class Identifier) 1(Qci can be understood to represent different service types) to Qci9PDCP successfully send the sum of Data amount of downlink Data plane SDU/1024) × 8/statistic period, accumulating the Data transmission duration from the first Data scheduling of each DRB downlink of each UE in the cell (the molecular statistics does not include the number of bytes of PDCP (Packet Data Convergence Protocol) SDU forwarded to other eNBs through an X2 or S1 interface in the switching process, and does not include whether the lower layer is retransmitted or failed in transmission).
The method for calculating the uplink average rate of the cell users comprises the following steps: (sum of accumulated data for uplink data plane SDU/1024) × 8/statistical period from Qci1 to Qci9, the data transmission duration from the first data scheduling on each DRB of each UE in the cell is accumulated.
In addition, the period for obtaining the average rate of the cell users may be set according to actual needs, for example, the average rate may be set at 9: 00 AM-10: 00AM obtains the average rate of cell users, which may also be at 6: 00 PM-8: 00PM obtains the average rate of the cell users, which is not limited in the embodiment of the present invention. However, the time period must be an integer multiple of the minimum granularity, and in general, the time granularity for the operator to extract the index is 15 minutes, 1 cell, and 1 day.
In the embodiment of the present invention, a cell-level uplink and downlink user average rate counter may be added in the base station, and the counter updates the cell user average rate every 15 minutes or an integral multiple thereof.
In a preferred embodiment of the present invention, the step of obtaining the average rate of the cell users of the cell with the highest field strength in the candidate handover cell list includes:
acquiring the cell type of the cell;
if the cell is an intra-station cell, acquiring the cell user average rate of the intra-station cell;
and if the cell is an inter-station cell, acquiring the average rate of cell users of the cell through X2 interactive messages.
In practical application, a terminal detects that other cells except a currently accessed serving cell may belong to a base station which is the same as the serving cell, such a cell is called an "intra-station cell", and may also belong to a base station which is different from the serving cell, such a cell is called an "inter-station cell", and different base stations and communication modes are also different, so that it is necessary to identify a cell type of a cell with the largest field strength in a candidate handover cell list, that is, to determine whether the cell is an intra-station cell or an inter-station cell.
If the cell is an intra-station cell, the base station can directly acquire the cell user average rate of the cell from the counter of the cell; if the cell is an inter-station cell, the cell user average rate of the detected cell needs to be acquired through the X2 interaction message, for example, the current cell may be requested to the target cell through the X2HANDOVER Request message.
after the cell user average rate of the detected cell is obtained, whether the cell user average rate of the detected cell meets a first preset condition or not can be judged.
In a preferred embodiment of the present invention, the step of determining whether the average rate of the cell users meets a first preset condition includes:
judging whether the average speed of the cell users is greater than a preset minimum cell user average speed or not;
and if the average speed of the cell users does not meet a first preset condition, deleting the cell from the candidate handover cell list.
In practical application, when there are other hidden fault factors such as transmission disorder, hidden fault in transmission, and a large number of users in a cell, the uplink and downlink rates drop suddenly after a user switches to a new cell, and the rate cannot be recovered for a long time, thereby affecting the normal use of the user.
Therefore, in the embodiment of the present invention, the average rate of users in the lowest cell is preset, and if the average rate of users in the cell to be detected is lower than the average rate of users in the lowest cell, the users cannot be used normally after being switched to the cell, so the cell to be detected is deleted from the candidate handover cell list, and then the cell with the second highest field strength in the candidate handover cell list is continuously detected for detection.
and if the average speed of the cell users of the detected cell is higher than the average speed of the users of the lowest cell, continuing to detect the coverage threshold of the cell.
in a preferred embodiment of the present invention, the step of determining whether the coverage threshold of the cell satisfies a second preset condition includes:
judging whether the field intensity of the cell is greater than a preset threshold value of a service cell;
and if the coverage threshold of the cell does not meet a second preset condition, deleting the cell from the candidate handover cell list.
Specifically, the base station compares the RSRP (Reference Signal Receiving Power) of the detected cell with a preset RSRP threshold of the serving cell, if the RSRP of the detected cell is greater than the preset RSRP threshold of the serving cell, it indicates that the detected cell meets a second preset condition, otherwise, the detected cell is deleted from the candidate handover cell list, and then the cell with the second largest field strength in the candidate handover cell list is continuously detected for detection.
when the detected cell meets the first preset condition and the second preset condition at the same time, the detected cell can be used as a target cell accessed by the terminal.
Specifically, the base station may send a handover command to the terminal after determining the target cell, and the terminal may handover to the target cell after receiving the handover command.
In the embodiment of the invention, after receiving a measurement report sent by a terminal, a base station generates a candidate switching cell list based on the measurement report, acquires the cell user average rate of a cell with the maximum field strength in the candidate switching cell list, then judges whether the cell user average rate meets a first preset condition, if so, acquires the coverage threshold of the cell, then judges whether the coverage threshold of the cell meets a second preset condition, if so, takes the cell as a target cell for terminal switching, and finally sends a cell switching command to the terminal; and the terminal is used for switching to the target cell according to the cell switching command. Therefore, the transmission rate of the target cell is acquired before the terminal is switched to the target cell, so that the problem that the transmission rate of the switched terminal suddenly drops due to transmission disorder, more users or other invisible faults of the switched target cell is avoided, the problem that the transmission rate of the switched terminal suddenly drops and cannot be restored for a long time after switching is also avoided, and the use perception of the user is improved.
It should be noted that, for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the illustrated order of acts, as some steps may occur in other orders or concurrently in accordance with the embodiments of the present 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.
Referring to fig. 2, a block diagram of a cell handover apparatus according to an embodiment of the present invention is shown, which may specifically include the following modules:
a receiving module 201, configured to receive a measurement report sent by a terminal;
a first generating module 202, configured to generate a candidate handover cell list based on the measurement report;
a first obtaining module 203, configured to obtain a cell user average rate of a cell with a maximum field strength in the candidate handover cell list;
a first determining module 204, configured to determine whether the average rate of the cell users meets a first preset condition;
a second obtaining module 205, configured to obtain a coverage threshold of the cell;
a second determining module 206, configured to determine whether the coverage threshold of the cell meets a second preset condition;
a determining module 207, configured to use the cell as a target cell for the terminal handover;
a sending module 208, configured to send a cell switching command to the terminal; and the terminal is used for switching to the target cell according to the cell switching command.
In a preferred embodiment of the present invention, the first obtaining module includes:
a cell type obtaining submodule for obtaining the cell type of the cell;
an intra-station cell obtaining submodule, configured to obtain a cell user average rate of an intra-station cell if the cell is the intra-station cell;
and the inter-station cell acquisition submodule is used for acquiring the average rate of cell users of the cell through X2 interactive messages if the cell is the inter-station cell.
In a preferred embodiment of the present invention, the first determining module includes:
the rate judgment submodule is used for judging whether the average rate of the cell users is greater than the preset average rate of the users in the lowest cell;
the second judging module includes:
and the field intensity judgment submodule is used for judging whether the field intensity of the cell is greater than a preset threshold value of a service cell.
In a preferred embodiment of the present invention, the apparatus further comprises:
and the deleting module is used for deleting the cell from the candidate handover cell list if the average speed of the cell users does not meet a first preset condition.
In a preferred embodiment of the present invention, the deleting module is further configured to delete the cell from the candidate handover cell list if the coverage threshold of the cell does not satisfy a second preset condition.
In a preferred embodiment of the present invention, the cell user average rate includes a cell uplink user average rate, and/or a cell downlink user average rate.
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 embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The method for cell handover and the device for cell handover provided by the present invention are introduced in detail above, and a specific example is applied in the text to explain the principle and the implementation of the present invention, and the description of the above embodiment is only used to help understanding the method of the present invention and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A method of cell handover, comprising:
receiving a measurement report sent by a terminal;
generating a list of candidate handover cells based on the measurement report;
acquiring the cell user average rate of the cell with the maximum field strength in the candidate switching cell list; the cells comprise intra-station cells and inter-station cells;
judging whether the average speed of the cell users meets a first preset condition or not; the first preset condition comprises that the average rate of users in the cell is greater than a preset minimum cell average rate; the cell user average rate comprises a cell uplink user average rate and/or a cell downlink user average rate; the average rate of the cell uplink users is determined by accumulating the sum of uplink data plane SDUs of different service types/1024 × 8/counting period and accumulating the data transmission duration of each DRB uplink of each UE in the cell from the first data scheduling;
if yes, acquiring a coverage threshold of the cell;
judging whether the coverage threshold of the cell meets a second preset condition or not; the second preset condition comprises that the second preset condition is greater than a preset threshold value of a serving cell;
if so, taking the cell as a target cell for the terminal switching;
sending a cell switching command to the terminal; and the terminal is used for switching to the target cell according to the cell switching command.
2. The method of claim 1, wherein the step of obtaining the average rate of cell users of the cell with the strongest field in the candidate handover cell list comprises:
acquiring the cell type of the cell;
if the cell is an intra-station cell, acquiring the cell user average rate of the intra-station cell;
and if the cell is an inter-station cell, acquiring the average rate of cell users of the cell through X2 interactive messages.
3. The method according to claim 1 or 2, wherein the step of determining whether the average rate of the cell users meets a first preset condition comprises:
judging whether the average speed of the cell users is greater than a preset minimum cell user average speed or not;
the step of judging whether the coverage threshold of the cell meets a second preset condition comprises:
and judging whether the field intensity of the cell is greater than a preset threshold value of a service cell.
4. The method according to claim 1 or 2, further comprising:
and if the average speed of the cell users does not meet a first preset condition, deleting the cell from the candidate handover cell list.
5. The method according to claim 1 or 2, further comprising:
and if the coverage threshold of the cell does not meet a second preset condition, deleting the cell from the candidate handover cell list.
6. An apparatus for cell handover, comprising:
the receiving module is used for receiving a measurement report sent by a terminal;
a first generating module for generating a candidate handover cell list based on the measurement report;
a first obtaining module, configured to obtain a cell user average rate of a cell with a largest field strength in the candidate handover cell list; the cells comprise intra-station cells and inter-station cells;
a first judging module, configured to judge whether the average rate of the cell users meets a first preset condition; the first preset condition comprises that the average rate of users in the cell is greater than a preset minimum cell average rate; the cell user average rate comprises a cell uplink user average rate and/or a cell downlink user average rate; the average rate of the cell uplink users is determined by accumulating the sum of uplink data plane SDUs of different service types/1024 × 8/counting period and accumulating the data transmission duration of each DRB uplink of each UE in the cell from the first data scheduling;
a second obtaining module, configured to obtain a coverage threshold of the cell;
a second judging module, configured to judge whether a coverage threshold of the cell meets a second preset condition; the second preset condition comprises that the second preset condition is greater than a preset threshold value of a serving cell;
a determining module, configured to use the cell as a target cell for the terminal handover;
a sending module, configured to send a cell switching command to the terminal; and the terminal is used for switching to the target cell according to the cell switching command.
7. The apparatus of claim 6, wherein the first obtaining module comprises:
a cell type obtaining submodule for obtaining the cell type of the cell;
an intra-station cell obtaining submodule, configured to obtain a cell user average rate of an intra-station cell if the cell is the intra-station cell;
and the inter-station cell acquisition submodule is used for acquiring the average rate of cell users of the cell through X2 interactive messages if the cell is the inter-station cell.
8. The apparatus according to claim 6 or 7, wherein the first determining module comprises:
the rate judgment submodule is used for judging whether the average rate of the cell users is greater than the preset average rate of the users in the lowest cell;
the second judging module includes:
and the field intensity judgment submodule is used for judging whether the field intensity of the cell is greater than a preset threshold value of a service cell.
9. The apparatus of claim 6 or 7, further comprising:
and the deleting module is used for deleting the cell from the candidate handover cell list if the average speed of the cell users does not meet a first preset condition.
10. The apparatus according to claim 6 or 7, wherein the deleting module is further configured to delete the cell from the candidate handover cell list if the coverage threshold of the cell does not satisfy a second preset condition.
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| CN101980569A (en) * | 2010-07-22 | 2011-02-23 | 展讯通信（上海）有限公司 | Data service transmission method of dual-mode terminal and dual-mode terminal |
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| CN101980569A (en) * | 2010-07-22 | 2011-02-23 | 展讯通信（上海）有限公司 | Data service transmission method of dual-mode terminal and dual-mode terminal |
| CN102395139A (en) * | 2011-10-08 | 2012-03-28 | 中兴通讯股份有限公司 | Multimode single-standby terminal different-mode type neighbor cell measurement time distribution method and device |
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