CN108882293B - Cell switching method, terminal and computer readable storage medium - Google Patents
Cell switching method, terminal and computer readable storage medium Download PDFInfo
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- CN108882293B CN108882293B CN201810596785.1A CN201810596785A CN108882293B CN 108882293 B CN108882293 B CN 108882293B CN 201810596785 A CN201810596785 A CN 201810596785A CN 108882293 B CN108882293 B CN 108882293B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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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
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information
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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
- H04W36/0085—Hand-off measurements
- H04W36/0088—Scheduling hand-off measurements
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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
- H04W36/0085—Hand-off measurements
- H04W36/0094—Definition of hand-off measurement parameters
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Abstract
The embodiment of the application discloses a cell switching method, which can comprise the following steps: when the current cell transmits service data, receiving a measurement configuration message sent by a source base station corresponding to the current cell; the measurement configuration message carries neighbor cell information and measurement parameters; determining the bandwidth of the adjacent cell corresponding to the adjacent cell information based on the preset network deployment information; when the current connection is normal and the bandwidth of the adjacent cell meets the preset lower limit range of the broadband, increasing a preset offset for the threshold value reported by triggering of the event corresponding to the pilot frequency cell in the measurement parameters to obtain an adjusted measurement parameter; and judging whether to report a measurement report based on the adjustment measurement parameter, wherein the measurement report is used for the source base station to carry out switching judgment. The embodiment of the application also discloses a terminal and a computer readable storage medium.
Description
Technical Field
The present disclosure relates to data transmission processing technologies in the field of communications, and in particular, to a cell switching method, a terminal, and a computer-readable storage medium.
Background
With the popularization and improvement of the 4th Generation mobile communication technology (4G) network and the overall improvement of terminal processing performance, especially the popularity of third party applications APP such as QQ, wechat, etc., more users start to conduct communication on terminals (e.g., mobile terminals). Therefore, the performance of the network delay of the terminal directly affects the use of the user.
At present, when a terminal performs a service, it needs to use a wireless network for communication, and in a practical process, a scenario with a small bandwidth may occur due to network deployment of an operator, for example, Band3 and Band8 supported by a mobile operator are only 5M, Band5 supported by a telecommunications operator is only 3M and 5M, so when the terminal performs a service processing using a small bandwidth, because the bandwidth is small, the number of resources allocated to the terminal by the wireless network is small, and thus a transmission delay occurs when the terminal performs a service processing or service data transmission on allocated resources or frequency bands, thereby causing a stuck phenomenon.
Disclosure of Invention
The embodiment of the application provides a cell switching method, a terminal and a computer-readable storage medium, which can reduce the transmission delay of data from the terminal to an air interface, improve the real-time performance of data transmission and improve the performance of the terminal.
The technical scheme of the application is realized as follows:
the embodiment of the application provides a cell switching method, which comprises the following steps:
when a current cell carries out service data transmission, receiving a measurement configuration message sent by a source base station corresponding to the current cell; the measurement configuration message carries neighbor cell information and measurement parameters;
determining the bandwidth of the adjacent cell corresponding to the adjacent cell information based on preset network deployment information;
when the current connection is normal and the bandwidth of the adjacent cell meets a preset broadband lower limit range, increasing a preset offset by a threshold value reported by triggering of an event corresponding to a pilot frequency cell in the measurement parameters to obtain an adjusted measurement parameter;
and judging whether to report a measurement report based on the adjusted measurement parameters, wherein the measurement report is used for the source base station to carry out switching judgment.
In the above scheme, before receiving the measurement configuration message sent by the source base station corresponding to the current cell, the method further includes:
acquiring historical measurement records and historical position information;
analyzing the bandwidth of the historical adjacent cell corresponding to the historical position information from the historical measurement record;
and taking the corresponding relation between the historical position information and the bandwidth of the historical adjacent cell as the preset network deployment information.
In the foregoing solution, the determining, based on preset network deployment information, a bandwidth of a neighboring cell corresponding to the neighboring cell information includes:
acquiring current position information;
and obtaining the bandwidth of the adjacent cell corresponding to the current position information from the preset network deployment information.
In the foregoing solution, after receiving the measurement configuration message sent by the source base station corresponding to the current cell, and before performing a handover decision based on the adjusted measurement parameter, the method further includes:
and performing neighbor cell measurement based on the neighbor cell information to obtain measurement information of the neighbor cell.
In the foregoing solution, the determining whether to report the measurement report based on the adjusted measurement parameter includes:
judging whether an event triggering condition is met or not according to the measurement information of the adjacent cell and the adjustment measurement parameter;
when the event trigger condition is met, sending the measurement report to the source base station to realize cell switching;
and when the event trigger condition is not met, continuing to transmit the service data in the current cell.
In the foregoing solution, before increasing the threshold value, which is reported by triggering an event corresponding to a pilot frequency cell in the measurement parameter, by a preset offset, the method further includes:
detecting the operation of the service data to obtain operation information;
when the operation information represents that the service data transmission is normal, detecting that the current connection is normal;
and when the operation information represents that the service data transmission is abnormal, detecting that the current connection is abnormal.
An embodiment of the present application provides a terminal, including:
a receiving unit, configured to receive a measurement configuration message sent by a source base station corresponding to a current cell when a current cell performs service data transmission; the measurement configuration message carries neighbor cell information and measurement parameters;
a determining unit, configured to determine, based on preset network deployment information, a bandwidth of a neighboring cell corresponding to the neighboring cell information;
a setting unit, configured to increase a preset offset by a threshold value, which is reported by event triggering corresponding to a different-frequency cell in the measurement parameters, when a current connection is normal and a bandwidth of the adjacent cell meets a preset lower-limit wideband range, so as to obtain an adjusted measurement parameter;
and a judging unit, configured to judge whether to generate a measurement report based on the adjusted measurement parameter, where the measurement report is used for the source base station to perform handover decision.
In the above terminal, the terminal further includes: an acquisition unit;
the obtaining unit is configured to obtain a historical measurement record and historical location information before receiving a measurement configuration message sent by a source base station corresponding to the current cell; analyzing the bandwidth of the historical adjacent cell corresponding to the historical position information from the historical measurement record; and taking the corresponding relation between the historical position information and the bandwidth of the historical adjacent cell as the preset network deployment information.
In the terminal, the determining unit is specifically configured to obtain current location information; and obtaining the bandwidth of the adjacent cell corresponding to the current position information from the preset network deployment information.
In the above terminal, the terminal further includes: a measuring unit;
and the measurement unit is configured to, after receiving the measurement configuration message sent by the source base station corresponding to the current cell and before performing a handover decision based on the adjustment measurement parameter, perform neighbor cell measurement based on the neighbor cell information to obtain measurement information of the neighbor cell.
In the above terminal, the terminal further includes: a sending unit and a service unit;
the judging unit is specifically configured to judge whether an event triggering condition is satisfied according to the measurement information of the neighboring cell and the adjusted measurement parameter;
the sending unit is configured to send the measurement report to the source base station when the event trigger condition is met, so as to implement cell handover;
and the service unit is used for continuing to transmit service data in the current cell when the event trigger condition is not met.
In the above terminal, the terminal further includes: a detection unit;
the detecting unit is configured to detect operation of service data before increasing a preset offset to a threshold value triggered and reported by an event corresponding to a pilot frequency cell in the measurement parameter, so as to obtain operation information; when the operation information represents that the service data transmission is normal, determining that the current connection is normal; and when the operation information represents that the service data transmission is abnormal, determining that the current connection is abnormal.
An embodiment of the present application further provides a terminal, including:
a receiver, a transmitter, a processor and a storage medium having stored thereon processor-executable instructions, received data of the receiver and transmitted data of the transmitter, the receiver, the transmitter and the storage medium operating over a communication bus in dependence of the processor, the instructions when executed by the processor performing the above-mentioned cell handover method.
Embodiments of the present application provide a computer storage medium storing executable instructions, which when executed by one or more processors, perform the cell handover method described above.
The embodiment of the application provides a cell switching method, a terminal and a computer readable storage medium, wherein the terminal receives a measurement configuration message sent by a source base station corresponding to a current cell when the current cell transmits service data; the measurement configuration message carries neighbor cell information and measurement parameters; determining the bandwidth of the adjacent cell corresponding to the adjacent cell information based on the preset network deployment information; when the current connection is normal and the bandwidth of the adjacent cell meets the preset lower limit range of the broadband, increasing a preset offset for the threshold value reported by triggering of the event corresponding to the pilot frequency cell in the measurement parameters to obtain an adjusted measurement parameter; and judging whether to report a measurement report based on the adjustment measurement parameter, wherein the measurement report is used for the source base station to carry out switching judgment. By adopting the technical implementation scheme, when the terminal transmits service data in the current cell and the network side equipment (base station) triggers the switching process in the moving process of the terminal, because the terminal can receive the measurement configuration message and under the premise that the current cell still has enough service data processing (namely the current connection is normal), when judging whether the adjacent cell belongs to the cell with the small bandwidth (meeting the bandwidth in the preset broadband lower limit range), the difficulty of event trigger reporting judgment is increased by increasing the value of the judgment threshold (contained in the adjustment measurement parameter) for triggering the generation of the measurement report, so that the measurement report can be reported to the base station side in a delayed manner, the process of delaying cell switching can be achieved, thereby avoiding the delay of data transmission when the cell is switched to the cell with the small bandwidth, and under the condition that the current cell can support the service data, the real-time performance of data transmission is improved, and the performance of the terminal is further improved.
Drawings
Fig. 1 is a diagram of a communication system architecture provided by an embodiment of the present application;
fig. 2 is a first flowchart of a cell handover method according to an embodiment of the present application;
fig. 3 is a second flowchart of a cell handover method according to an embodiment of the present application;
fig. 4 is a first schematic structural diagram of a terminal according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a terminal according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long term evolution (Long term evolution, LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication System, or a 5G System.
Illustratively, a communication system 100 applied in the embodiment of the present application is shown in fig. 1. The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, a terminal). Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within that coverage area. Optionally, the Network device 110 may be a base Station (BTS) in a GSM system or a CDMA system, a base Station (NodeB, NB) in a WCDMA system, an evolved Node B (eNB or eNodeB) in an LTE system, or a wireless controller in a Cloud Radio Access Network (CRAN), or a Network device in a Mobile switching center, a relay Station, an Access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, a Network-side device in a 5G Network, or a Network device in a Public Land Mobile Network (PLMN) for future evolution, or the like.
The communication system 100 further comprises at least one terminal device 120 located within the coverage area of the network device 110. As used herein, "terminal equipment" includes, but is not limited to, connections via wireline, such as Public Switched Telephone Network (PSTN), Digital Subscriber Line (DSL), Digital cable, direct cable connection; and/or another data connection/network; and/or via a Wireless interface, e.g., to a cellular Network, a Wireless Local Area Network (WLAN), a digital television Network such as a DVB-H Network, a satellite Network, an AM-FM broadcast transmitter; and/or means of another terminal device arranged to receive/transmit communication signals; and/or Internet of Things (IoT) devices. A terminal device arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal", or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; personal Communications Systems (PCS) terminals that may combine cellular radiotelephones with data processing, facsimile, and data Communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. Terminal Equipment may refer to an access terminal, User Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, User terminal, wireless communication device, User agent, or User Equipment. An access terminal may be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device having Wireless communication capabilities, a computing device or other processing device connected to a Wireless modem, a vehicle mounted device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolved PLMN, etc.
The cell handover method provided by the present application is implemented based on the architecture shown in fig. 1.
Example one
An embodiment of the present application provides a cell handover method, as shown in fig. 2, the method may include:
s101, when a current cell transmits service data, receiving a measurement configuration message sent by a source base station corresponding to the current cell; the measurement configuration message carries neighbor information and measurement parameters.
An application scenario of the cell switching method provided by the embodiment of the present invention may be as follows: when a terminal (i.e., UE) moves from a current cell (source cell) where the terminal is located to an adjacent cell (target cell) in the moving process, a cell handover is required.
It should be noted that, in the moving process, the terminal is in a state of performing service data transmission in the current cell, that is, the terminal is moving in a connected state.
It should be noted that, preferably, the network environment implemented by the embodiment of the present invention may be LTE.
Optionally, the terminal in the embodiment of the present invention may be an electronic device with a wireless communication function, for example, a mobile phone, a tablet, and the like, which is not limited in the embodiment of the present application.
In the embodiment of the present application, when the terminal covers the whole cell well, the terminal is usually in a situation that 2-3 cells (i.e. multiple cells) cover simultaneously when moving. For the transmission of the current service data of the terminal, the RF resource or IP link of the current cell may support the current data requirement, and therefore, the cell handover method provided by the present application is implemented based on such consideration.
It should be noted that, during the moving process of the user mobile terminal, the user mobile terminal may perform handover from the current cell to the target cell, which causes Resource reconstruction of a Radio Resource Control (RRC) layer, that is, reconnection of rrcreestablstriement and TCP/IP data in an upper layer. The general handover procedure starts with the neighbor cell measurement of the terminal, reports the measurement report obtained by the measurement to the base station, and the base station determines that all the measurement reports issue rrcreeconfiguration to perform the handover procedure. Namely: it should be noted that, in the embodiment of the present invention, the specific implementation of the switching process may be: a terminal receives a measurement configuration message sent by a source base station; the terminal carries out measurement of adjacent cells based on the measurement configuration message to obtain a measurement report; the terminal reports the measurement report to the source base station; the terminal receives a switching instruction sent by a source base station based on a measurement report; and the terminal performs a random access process of the target cell according to the switching instruction to complete cell switching.
That is, when the current cell performs service data transmission, the terminal receives a measurement configuration message sent by a source base station corresponding to the current cell due to movement; the measurement configuration message carries neighbor information and measurement parameters.
In this embodiment of the present application, the measurement configuration message may carry: the neighbor list (neighbor information), the decision threshold parameter (measurement parameter), etc., and in addition, the measurement configuration message may also carry information such as report configuration, measurement identifier, quantity configuration, etc.
It should be noted that the measurement may include: co-frequency measurement and inter-frequency measurement. Wherein, the same frequency measurement is to measure the downlink frequency point of the adjacent cell which is the same as the downlink frequency point of the current cell. The pilot frequency measurement is to measure a downlink frequency point (same cell or adjacent cell) different from the downlink frequency point of the current cell.
In the embodiment of the present application, a scenario in which a terminal mainly aims at a different-frequency cell to implement handover is provided, and therefore, the terminal aims at different-frequency measurement.
S102, based on the preset network deployment information, determining the bandwidth of the adjacent cell corresponding to the adjacent cell information.
In the embodiment of the application, the terminal stores preset network deployment information in advance, and the mapping relationship between the position represented by the preset network deployment information and the bandwidth of the adjacent cell is obtained based on historical measurement statistics of the terminal. The specific process can be as follows:
acquiring historical measurement records and historical position information;
analyzing the bandwidth of the historical adjacent cell corresponding to the historical position information from the historical measurement record;
and taking the corresponding relation between the historical position information and the bandwidth of the historical adjacent cell as the preset network deployment information.
In this way, the process of determining, by the terminal, the bandwidth of the neighboring cell corresponding to the neighboring cell information based on the preset network deployment information may include: s1021-1022. The following were used:
and S1021, acquiring the current position information.
And S1022, obtaining the bandwidth of the adjacent cell corresponding to the current position information from the preset network deployment information.
The terminal can acquire the current position information of the terminal through a positioning function or a notification of a base station, and the preset network deployment information is the corresponding relation between the historical position information and the bandwidth of the historical adjacent cell, so that the terminal can acquire the bandwidth of the adjacent cell corresponding to the terminal at the moment from the preset network deployment information as long as the current position of the terminal is the place where the terminal has come before. Thus, after the terminal acquires the preset network deployment information, the terminal can determine the bandwidth of the neighboring cell at the current position based on the preset deployment information.
The location information may be a place name, a longitude and latitude, or a location represented by a cell coverage, and the like, which is not limited in the embodiment of the present application.
It should be noted that in the practical process, a small bandwidth scenario may occur due to network deployment of an operator, for example, Band3 and Band8 supported by a mobile operator are only 5M, and Band5 supported by a telecommunications operator is only 3M and 5M, so that when a terminal uses a cell with a small bandwidth to perform service processing, because the bandwidth is small, the number of resources allocated to the terminal by a wireless network is small, and thus, a stuck phenomenon occurs due to transmission delay when the terminal performs service processing or service data transmission on the allocated resources or frequency bands. Therefore, in the embodiment of the present application, it is determined whether the neighboring cell is a cell with a small bandwidth or not according to the motion trajectory of the user, that is, the current position information, and some different handover processes are performed for the cell with the small bandwidth.
S103, when the current connection is normal and the bandwidth of the adjacent cell meets the preset broadband lower limit range, increasing a preset offset by the threshold value reported by triggering of the event corresponding to the pilot frequency cell in the measurement parameters to obtain the adjusted measurement parameters.
And S104, judging whether to report a measurement report based on the adjustment of the measurement parameters, wherein the measurement report is used for the source base station to carry out switching judgment.
After obtaining the measurement parameters and the bandwidths of the adjacent cells, the terminal adjusts the threshold value of event trigger reporting corresponding to the inter-frequency cell in the measurement parameters when the current connection is normal and the adjacent cell is a cell with a small bandwidth (meeting a preset lower limit range of the broadband), and increases the threshold value of event trigger reporting by a preset offset, thereby obtaining the adjusted measurement parameters.
The preset lower limit of the wideband is a bandwidth range of a small bandwidth, for example, 3M to 5M, and the preset lower limit of the wideband may be a continuous range value or at least one value, which is not limited in the embodiments of the present application.
It should be noted that, in this embodiment of the present application, a premise that the terminal may be switched to the cell with the small bandwidth in a delayed manner is that a connection status of the current cell of the terminal is normal, which is sufficient to continue supporting service data transmission of the terminal. That is, before the adjustment of the measurement parameters is performed, the terminal needs to perform the following processes:
and S109, detecting the operation of the service data to obtain operation information.
And S110, when the operation information represents that the service data transmission is normal, detecting that the current connection is normal.
And S111, when the operation information represents that the service data transmission is abnormal, detecting that the current connection is abnormal.
The terminal tests the connection status of the service data server at the user side, tests parameters (operation information) such as PING or packet loss rate, namely detects the operation state of the service data, thereby obtaining the operation information. The terminal can know whether the service data can be normally transmitted or not through the operation information, and then determines whether the current connection state is normal or not, namely when the operation information represents that the service data is normally transmitted, the terminal detects that the current connection is normal (enough to support the current service processing); when the operation information represents that the service data transmission is abnormal, the terminal detects that the current connection is abnormal (the current service processing is not supported sufficiently). When the current connection is normal, the terminal can improve the difficulty of reporting the measurement report and delay the switching. When the current connection is abnormal, the terminal performs the existing switching process to realize cell switching.
It should be noted that, when the terminal receives the measurement configuration information, the terminal starts to perform measurement, but the threshold is increased by the terminal for triggering the reporting decision threshold of the event for reporting the measurement report, which increases the difficulty of reporting the measurement report, so as to avoid the situation that the terminal is switched to the small bandwidth cell to perform service data transmission and is stuck.
Here, the handover requires the terminal (UE) to report the measurement result (i.e. measurement report), and the reporting can be divided into periodic reporting and event-triggered reporting, where the periodic reporting is configured by the base station, and the terminal only needs to directly report the measurement result. In the embodiment of the present application, for the event triggered reporting mode, the event triggered reporting is further divided into events of a same-frequency system, events of a different-frequency system, and events of different systems. The measurement configuration message carries the relevant parameters for event triggering and reporting. The method comprises the following specific steps:
a1: the source cell is better than a certain threshold; this event can be used to turn off measurements for certain cells;
a2: the source cell is worse than a certain threshold; this event may be used to start measurements for certain cells, since a handover or the like may occur after this event;
a3: the neighbor cell is better than the source cell by a certain threshold;
a4: the neighbor cell is better than a certain threshold;
a5: the source cell is worse than a certain threshold and the neighbor cell is better than a certain threshold;
b1: the quality of the adjacent area of the different system is higher than a certain threshold;
b2: the quality of the source cell is lower than a certain threshold and the quality of the adjacent cell of the different system is higher than a certain threshold.
In the embodiment of the present invention, the event triggering report triggering the terminal to perform inter-frequency measurement may be an A3 event, an a4 event, or an a5 event.
It should be noted that, in this embodiment of the present application, for an LTE system, handover, inter-frequency measurement start or stop thresholds, transmission mode conversion, and the like are all performed depending on information in an RRC Connection Reconfiguration signaling, and a UE performs a decision by testing levels of a source cell and a neighboring cell, and sends a measurement report after a condition is satisfied. Different measurement reports are sent on different events, each measurement report has one and only one MeasId, and one MeasId corresponds to one event. For example, MeasId1 corresponds to co-frequency A3, MeasId14 corresponds to 4-3 redirection, MeasId15 corresponds to inter-frequency a1 event, MeasId7 corresponds to inter-frequency a2 event, MeasId14 corresponds to inter-frequency A3 event, MeasId13 corresponds to inter-frequency a5 event, and MeasId9 corresponds to inter-frequency MR strong neighbor reporting, etc. Here, after obtaining the measurement report and reporting the measurement report, the terminal obtains an RRC Connection Reconfiguration (handover command) for issuing a handover command, where the handover command carries a Physical Cell Identifier (PCI) of the target Cell. However, if the terminal does not obtain the measurement report, the terminal does not perform cell switching first.
The adjustment of the measurement parameters is described below using the a3 event as an example.
Event a3 triggers that the quality of the neighbor cell is higher than the serving cell by a certain offset value.
The decision formula of A3, that is, the event trigger condition is Mn + Ofn + Ocn-Hys > Ms + Ofs + Ocs + Off, where Mn is the neighbor cell measurement result, Off is the specific frequency offset of the neighbor cell frequency, Ocn is the specific cell offset of the neighbor cell, Ms is the measurement result of the serving cell, Off is the specific frequency offset of the serving cell, Ocs is the specific cell offset of the serving cell, Hys is the event A3 hysteresis parameter, and Off is the event A3 offset parameter.
In the embodiment of the application, Ofs + Ocs + Off-Ofn-Ocn + Hys or Ofn + Ocn-Hys-Ofs-Ocs-Off is a threshold value of an A3 event (a threshold value reported by corresponding event trigger). The terminal adds a preset offset custom offset to the threshold value to increase the difficulty of triggering the a3 event, and obtains an adjusted measurement parameter (where the threshold value is added by the preset offset custom offset).
In the embodiment of the present application, the preset offset is a positive number.
After the threshold value reported by the event trigger is increased by the preset offset, the terminal can adjust the measurement parameter according to the new threshold value to judge whether to report the measurement report, and the measurement report is used for the source base station to make a switching judgment. The process that the terminal judges whether to report the measurement report is the process that the judgment is enough to meet the event triggering condition.
Further, after S101 and before S104, the cell handover method provided by the present application may further include: and S105. The following were used:
and S105, performing neighbor cell measurement based on the neighbor cell information to obtain measurement information of the neighbor cell.
In the process of reporting the event trigger by the terminal, the neighbor cell measurement result is needed, so before the judgment, the terminal performs neighbor cell measurement based on the neighbor cell information to obtain the measurement information (neighbor cell measurement result) of the neighbor cell, and reports the event trigger by using the neighbor cell measurement result.
As shown in fig. 3, based on the implementation of S105, the process of S104 may include: S1041-S1043. The following were used:
and S1041, judging whether the event triggering condition is met according to the measurement information and the adjustment measurement parameter of the adjacent cell.
S1042, when the event trigger condition is satisfied, sending the measurement report to the source base station to realize cell switching.
And S1043, when the event trigger condition is not met, continuing to transmit the service data in the current cell.
The terminal may determine whether an event trigger condition corresponding to an event is satisfied, for example, Mn + Ofn + Ocn-Hys > Ms + Ofs + Ocs + Off corresponding to an a3 event, based on the measurement information and the adjustment measurement parameter of the neighboring cell. Therefore, when the event triggering condition is met, the terminal sends the measurement report to the source base station so that the source base station can carry out cell switching judgment to realize cell switching. And when the event triggering condition is not met, the terminal continues to transmit the service data in the current cell. Because the terminal in the prior art improves the difficulty of event triggering reporting, the terminal can not meet the event triggering condition with high probability, so that the terminal continues to transmit service data in the current cell, and the phenomenon of blockage when the cell is switched to a cell with a small bandwidth is avoided.
It should be noted that some event triggers in the event trigger conditions need the current cell measurement result and the neighboring cell measurement result, and some event triggers only need the neighboring cell measurement result, so the terminal may decide not to use the current cell measurement result to further implement the determination of the event trigger conditions for different events, which is not limited in the embodiment of the present application.
It can be understood that, in the process of terminal movement, when the terminal performs service data transmission in the current cell and the network side device (base station) triggers the handover procedure, since the terminal can receive the measurement configuration message and on the premise that the current cell still has enough service data processing (i.e. the current connection is normal), when judging whether the neighboring cell belongs to the cell of the cell bandwidth (meeting the bandwidth within the preset bandwidth lower limit), the difficulty of event-triggered reporting judgment is increased by increasing the value of the judgment threshold (included in the adjustment measurement parameter) for triggering the measurement report to generate, so that the measurement report may be reported to the base station side in a delayed manner, thereby achieving the procedure of delayed cell handover, avoiding the delay of data transmission when the cell is handed over to the cell of the cell bandwidth, and under the condition that the current cell can support service data, the real-time performance of data transmission is improved, and the performance of the terminal is further improved.
Example two
Based on the same inventive concept of the first embodiment, as shown in fig. 4, the present application provides a terminal 1, where the terminal 1 may include:
a receiving unit 10, configured to receive a measurement configuration message sent by a source base station corresponding to a current cell when a current cell performs service data transmission; the measurement configuration message carries neighbor cell information and measurement parameters;
a determining unit 11, configured to determine, based on preset network deployment information, a bandwidth of a neighboring cell corresponding to the neighboring cell information;
a setting unit 12, configured to increase, when the current connection is normal and the bandwidth of the neighboring cell meets a preset lower bandwidth limit range, a preset offset by a threshold value triggered and reported by an event corresponding to a pilot frequency cell in the measurement parameters, so as to obtain an adjusted measurement parameter;
a determining unit 13, configured to determine whether to generate a measurement report based on the adjusted measurement parameter, where the measurement report is used for the source base station to perform handover decision.
In some embodiments of the present application, the terminal 1 further comprises: an acquisition unit 14.
The obtaining unit 14 is configured to obtain a historical measurement record and historical location information before the measurement configuration message sent by the source base station corresponding to the current cell is received; analyzing the bandwidth of the historical adjacent cell corresponding to the historical position information from the historical measurement record; and taking the corresponding relation between the historical position information and the bandwidth of the historical adjacent cell as the preset network deployment information.
In some embodiments of the present application, the determining unit 11 is specifically configured to obtain current location information; and obtaining the bandwidth of the adjacent cell corresponding to the current position information from the preset network deployment information.
In some embodiments of the present application, the terminal 1 further comprises: a measuring unit 15.
The measurement unit 15 is configured to, after receiving the measurement configuration message sent by the source base station corresponding to the current cell and before performing a handover decision based on the adjustment measurement parameter, perform neighbor cell measurement based on the neighbor cell information to obtain measurement information of the neighbor cell.
In some embodiments of the present application, the terminal 1 further comprises: a sending unit 16 and a traffic unit 17.
The determining unit 13 is specifically configured to determine whether an event triggering condition is satisfied according to the measurement information of the neighboring cell and the adjusted measurement parameter.
The sending unit 16 is configured to send the measurement report to the source base station when the event trigger condition is met, so as to implement cell handover.
And the service unit 17 is configured to continue to perform service data transmission in the current cell when the event trigger condition is not satisfied.
In some embodiments of the present application, the terminal 1 further comprises: a detection unit 18.
The detecting unit 18 is configured to detect operation of service data before increasing a preset offset to a threshold value triggered and reported by an event corresponding to a pilot frequency cell in the measurement parameter, so as to obtain operation information; when the operation information represents that the service data transmission is normal, determining that the current connection is normal; and when the operation information represents that the service data transmission is abnormal, determining that the current connection is abnormal.
It should be noted that the terminal 1 in the embodiment of the present application may be identical to the terminal device 120 in fig. 1.
In practical applications, the determining Unit 11, the setting Unit 12, the determining Unit 13, the obtaining Unit 14, the measuring Unit 15, the service Unit 17, and the detecting Unit 18 may be implemented by a processor 19 located on the terminal 1, specifically, a Central Processing Unit (CPU), a Microprocessor Unit (MPU), a Digital Signal Processor (DSP), a Field Programmable Gate Array (FPGA), or the like, the transmitting Unit 16 may be implemented by a transmitter 110, and the receiving Unit 10 may be implemented by a receiver 111.
Based on this, as shown in fig. 5, an embodiment of the present application further provides a terminal, including:
a receiver 111, a transmitter 110, a processor 19, and a storage medium 112 storing instructions executable by the processor 19, received data of the receiver 111, and data transmitted by the transmitter 19, wherein the receiver 111, the transmitter 110, and the storage medium 112 rely on the processor 19 to perform operations via a communication bus 113, and when the instructions are executed by the processor 19, the cell handover method in the first embodiment is implemented.
It should be noted that, in practical applications, the various components in the terminal are coupled together by a communication bus 113. It will be appreciated that a communication bus 113 is used to enable connective communication between these components. The communication bus 113 includes a power bus, a control bus, and a status signal bus in addition to a data bus. But for clarity of illustration the various buses are labeled in figure 5 as communication bus 113.
It can be understood that, in the process of terminal movement, when the terminal performs service data transmission in the current cell and the network side device (base station) triggers the handover procedure, since the terminal can receive the measurement configuration message and on the premise that the current cell still has enough service data processing (i.e. the current connection is normal), when judging whether the neighboring cell belongs to the cell of the cell bandwidth (meeting the bandwidth within the preset bandwidth lower limit), the difficulty of event-triggered reporting judgment is increased by increasing the value of the judgment threshold (included in the adjustment measurement parameter) for triggering the measurement report to generate, so that the measurement report may be reported to the base station side in a delayed manner, thereby achieving the procedure of delayed cell handover, avoiding the delay of data transmission when the cell is handed over to the cell of the cell bandwidth, and under the condition that the current cell can support service data, the real-time performance of data transmission is improved, and the performance of the terminal is further improved.
The embodiment of the present application provides a computer storage medium, which stores executable instructions, and when the executable instructions are executed by one or more processors, the processors execute the cell handover method in the first embodiment.
The computer-readable storage medium may be a magnetic random access Memory (FRAM), a Read Only Memory (ROM), a Programmable Read Only Memory (PROM), an Erasable Programmable Read Only Memory (EPROM), an Electrically Erasable Programmable Read Only Memory (EEPROM), a Flash Memory (Flash Memory), a magnetic surface Memory, an optical Disc, or a Compact Disc Read-Only Memory (CD-ROM), among others.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application 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, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. 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 apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, 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 apparatus 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 apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application.
Claims (14)
1. A method of cell handover, comprising:
when a current cell carries out service data transmission, receiving a measurement configuration message sent by a source base station corresponding to the current cell; the measurement configuration message carries neighbor cell information and measurement parameters;
determining the bandwidth of the adjacent cell corresponding to the adjacent cell information based on preset network deployment information; the preset network deployment information is used for representing the corresponding relation between the historical position information of the terminal and the bandwidth of the adjacent cell;
when the current connection is normal and the bandwidth of the adjacent cell meets a preset broadband lower limit range, increasing a preset offset by a threshold value reported by triggering of an event corresponding to a pilot frequency cell in the measurement parameters to obtain an adjusted measurement parameter;
and judging whether to report a measurement report based on the adjusted measurement parameters, wherein the measurement report is used for the source base station to carry out switching judgment.
2. The method of claim 1, wherein before receiving the measurement configuration message sent by the source base station corresponding to the current cell, the method further comprises:
acquiring historical measurement records and historical position information;
analyzing the bandwidth of the historical adjacent cell corresponding to the historical position information from the historical measurement record;
and taking the corresponding relation between the historical position information and the bandwidth of the historical adjacent cell as the preset network deployment information.
3. The method of claim 2, wherein the determining the bandwidth of the neighboring cell corresponding to the neighboring cell information based on the preset network deployment information includes:
acquiring current position information;
and obtaining the bandwidth of the adjacent cell corresponding to the current position information from the preset network deployment information.
4. The method of claim 1, wherein after receiving the measurement configuration message sent by the source base station corresponding to the current cell and before making a handover decision based on the adjusted measurement parameter, the method further comprises:
and performing neighbor cell measurement based on the neighbor cell information to obtain measurement information of the neighbor cell.
5. The method of claim 4, wherein determining whether to report a measurement report based on the adjusted measurement parameter comprises:
judging whether an event triggering condition is met or not according to the measurement information of the adjacent cell and the adjustment measurement parameter;
when the event trigger condition is met, sending the measurement report to the source base station to realize cell switching;
and when the event triggering condition is not met, continuing to transmit the service data in the current cell.
6. The method of claim 1, wherein before increasing the threshold value for triggering and reporting the event corresponding to the inter-frequency cell in the measurement parameter by a preset offset, the method further comprises:
detecting the operation of the service data to obtain operation information;
when the operation information represents that the service data transmission is normal, detecting that the current connection is normal;
and when the operation information represents that the service data transmission is abnormal, detecting that the current connection is abnormal.
7. A terminal, comprising:
a receiving unit, configured to receive a measurement configuration message sent by a source base station corresponding to a current cell when a current cell performs service data transmission; the measurement configuration message carries neighbor cell information and measurement parameters;
a determining unit, configured to determine, based on preset network deployment information, a bandwidth of a neighboring cell corresponding to the neighboring cell information; the preset network deployment information is used for representing the corresponding relation between the historical position information of the terminal and the bandwidth of the adjacent cell;
a setting unit, configured to increase a preset offset by a threshold value, which is reported by event triggering corresponding to a different-frequency cell in the measurement parameters, when a current connection is normal and a bandwidth of the adjacent cell meets a preset lower-limit wideband range, so as to obtain an adjusted measurement parameter;
and a judging unit, configured to judge whether to generate a measurement report based on the adjusted measurement parameter, where the measurement report is used for the source base station to perform handover decision.
8. The terminal of claim 7, further comprising: an acquisition unit;
the obtaining unit is configured to obtain a historical measurement record and historical location information before receiving a measurement configuration message sent by a source base station corresponding to the current cell; analyzing the bandwidth of the historical adjacent cell corresponding to the historical position information from the historical measurement record; and taking the corresponding relation between the historical position information and the bandwidth of the historical adjacent cell as the preset network deployment information.
9. The terminal of claim 8,
the determining unit is specifically configured to obtain current location information; and obtaining the bandwidth of the adjacent cell corresponding to the current position information from the preset network deployment information.
10. The terminal of claim 7, further comprising: a measuring unit;
and the measurement unit is configured to, after receiving the measurement configuration message sent by the source base station corresponding to the current cell and before performing a handover decision based on the adjustment measurement parameter, perform neighbor cell measurement based on the neighbor cell information to obtain measurement information of the neighbor cell.
11. The terminal of claim 10, further comprising: a sending unit and a service unit;
the judging unit is specifically configured to judge whether an event triggering condition is satisfied according to the measurement information of the neighboring cell and the adjusted measurement parameter;
the sending unit is configured to send the measurement report to the source base station when the event trigger condition is met, so as to implement cell handover;
and the service unit is used for continuing to transmit service data in the current cell when the event trigger condition is not met.
12. The terminal of claim 7, further comprising: a detection unit;
the detecting unit is configured to detect operation of service data before increasing a preset offset to a threshold value triggered and reported by an event corresponding to a pilot frequency cell in the measurement parameter, so as to obtain operation information; when the operation information represents that the service data transmission is normal, determining that the current connection is normal; and when the operation information represents that the service data transmission is abnormal, determining that the current connection is abnormal.
13. A terminal, comprising:
receiver, transmitter, processor and storage medium having stored thereon processor-executable instructions, received data of the receiver and transmitted data of the transmitter, the receiver, the transmitter and the storage medium operating on the processor via a communication bus, the instructions, when executed by the processor, performing the cell handover method of any of the preceding claims 1 to 6.
14. A computer storage medium having stored thereon executable instructions which, when executed by one or more processors, perform the cell handover method of any one of claims 1 to 6.
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| CN201810596785.1A CN108882293B (en) | 2018-06-11 | 2018-06-11 | Cell switching method, terminal and computer readable storage medium |
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| CN201810596785.1A CN108882293B (en) | 2018-06-11 | 2018-06-11 | Cell switching method, terminal and computer readable storage medium |
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