CN110392391B - Cell fallback method and terminal equipment - Google Patents
Cell fallback method and terminal equipment Download PDFInfo
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- CN110392391B CN110392391B CN201910665860.XA CN201910665860A CN110392391B CN 110392391 B CN110392391 B CN 110392391B CN 201910665860 A CN201910665860 A CN 201910665860A CN 110392391 B CN110392391 B CN 110392391B
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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
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/0085—Hand-off measurements
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Abstract
The invention discloses a cell fallback method and terminal equipment, aiming at reducing call establishment time to improve user experience, wherein the method comprises the following steps: the terminal equipment acquires first configuration information; the terminal equipment measures the frequency point information according to the first configuration information and generates a first measurement report; the terminal equipment selects N fallback cells with the strongest signal strength in a first measurement report to form a first candidate cell set, wherein N is a positive integer; and the terminal equipment falls back to the corresponding falling-back cell according to the frequency point information of each falling-back cell in the first candidate cell set. The invention can realize the advanced measurement of the fallback cell, reduce the paging time and improve the user experience.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a cell dropping method and a terminal device.
Background
Currently, in a CSFB (Circuit switched Fallback) implementation process, when a Mobile terminal has an incoming call, a call session control device to which a calling party belongs sends an inquiry request to an HLR (Home Location Register) according to a called number, the HLR feeds back MSC (Mobile switching center) Location information, the call session control device sends a call request to a Mobile switching center MSC, the Mobile switching center MSC sends a paging request to an MME (Mobile management Entity) according to an SGs interface, the MME sends a paging request to the Mobile terminal, the Mobile terminal sends an extension service request to the MME, and a base station eNB (evolved Node B, evolved base station) sends configured Fallback cell identifiers and frequency point information to the Mobile terminal according to cell information in which the Mobile terminal is currently located, the Mobile terminal performs inter-system cell measurement, sends a measurement result to the base station, and indicates that the Mobile terminal is in a suitable cell to the eNB.
However, when the TAI (location Area identity) where the mobile terminal is located spans multiple LAIs (location Area identities), the number of fallback cells provided by the base station eNB will be multiple, and the mobile terminal needs to perform measurement on multiple cells, thereby prolonging call setup time and affecting user experience.
Disclosure of Invention
The invention provides a cell drop-back method and terminal equipment, which aim to solve the problems of prolonging call establishment time and the like caused by the need of measuring a plurality of cells when a mobile terminal crosses a position.
In order to achieve the above object, the present invention provides a cell dropping method, including:
the terminal equipment acquires first configuration information;
the terminal equipment measures the frequency point information according to the first configuration information and generates a first measurement report;
the terminal equipment selects N fallback cells with the strongest signal strength in a first measurement report to form a first candidate cell set, wherein N is a positive integer;
and the terminal equipment falls back to the corresponding falling cell according to the frequency point information of each falling cell in the first candidate cell set.
Optionally, before the terminal device obtains the first configuration information, the method further includes:
the terminal equipment starts a joint attachment process;
after the terminal device completes the joint attachment, a request for acquiring first configuration information is sent to a base station so that the base station sends the first configuration information to the terminal device, wherein the first configuration information comprises cell identifications and corresponding frequency point information of a plurality of fallback cells configured for the terminal device by the base station and used for the terminal device to fallback.
Optionally, after the terminal device selects N fallback cells with the strongest signal strengths in the first measurement report to form the first candidate cell set, the method further includes:
the terminal equipment stores the frequency point information of each fallback cell in the first alternative cell set;
the dropping back of the terminal equipment to the corresponding drop-back cell according to the frequency point information of each drop-back cell in the first candidate cell set comprises the following steps:
the terminal equipment selects a fallback cell with the strongest signal strength in the first candidate cell set as a fallback cell corresponding to the terminal equipment;
and the terminal equipment falls back to the corresponding fall-back cell.
Optionally, the terminal device falls back to the corresponding fallback cell according to the frequency point information of each fallback cell in the first candidate cell set, and further includes:
after the terminal equipment reselects the cell, sending a request for acquiring second configuration information to a base station so that the base station sends the second configuration information to the terminal equipment;
the terminal equipment acquires the second configuration information;
the terminal equipment measures the frequency point information according to the second configuration information and generates a second measurement report;
the terminal equipment selects N fallback cells with the strongest signal strength in a second measurement report to form a second candidate cell set;
and the terminal equipment uses the frequency point information of each fallback cell in the second alternative cell set to replace the previously stored frequency point information of each fallback cell in the first alternative cell set.
Optionally, after the terminal device measures the frequency point information according to the first configuration information/the second configuration information and generates a first measurement report/a second measurement report, the method further includes:
and the terminal equipment sends the first measurement report/the second measurement report to a base station.
Optionally, the method further comprises:
and the terminal equipment performs ascending/descending sequencing of signal intensity on each fallback cell in the first candidate cell set.
Optionally, the method further comprises:
the terminal equipment judges whether the terminal equipment successfully falls back to a corresponding falling cell;
if the terminal equipment does not successfully fall back, the terminal equipment reorders the rest N-1 fall-back cells in the first candidate cell set except the corresponding fall-back cell according to signal strength;
and the terminal equipment performs one-by-one fallback according to the reordered frequency point information of the N-1 fallback cells from high to low in signal intensity until the terminal equipment successfully falls back.
In order to achieve the above object, the present invention further provides a terminal device, including:
the first configuration acquisition module is used for acquiring first configuration information;
a first measurement report generating module, configured to measure the frequency point information according to the first configuration information and generate a first measurement report;
a first selecting module, configured to select N fallback cells with the strongest signal strength in the first measurement report to form a first candidate cell set, where N is a positive integer;
and the first fallback module is used for fallback to the fallback cell corresponding to the terminal device according to the frequency point information of each fallback cell in the first candidate cell set.
Optionally, the terminal device further includes:
the joint attachment module is used for starting a joint attachment process;
and the first configuration request module is used for sending a request for acquiring first configuration information to a base station after the joint attachment is completed so that the base station sends the first configuration information to the terminal equipment, wherein the first configuration information comprises cell identifications and corresponding frequency point information of a plurality of fallback cells for the terminal equipment to fallback, which are configured for the terminal equipment by the base station.
Optionally, the terminal device further includes:
the storage module is used for storing the frequency point information of each fallback cell in the first alternative cell set;
the first drop-back module comprises:
a selecting unit, configured to select a fallback cell with the strongest signal strength in the first candidate cell set as a fallback cell corresponding to the terminal device;
and the fallback unit is used for fallback to a fallback cell corresponding to the terminal device.
Optionally, the terminal device further includes:
a second configuration request module, configured to send, after the terminal device performs cell reselection, a request for obtaining second configuration information to a base station, so that the base station sends the second configuration information to the terminal device, where the second configuration information includes cell identifiers of multiple fallback cells for the terminal device to fallback, and corresponding frequency point information, where the cell identifiers are reconfigured by the base station for the terminal device;
a second configuration obtaining module, configured to obtain the second configuration information;
a second measurement report generation module, configured to perform measurement on the frequency point information according to the second configuration information and generate a second measurement report;
a second selecting module, configured to select N fallback cells with the strongest signal strength in the second measurement report to form a second candidate cell set;
and the replacing module is used for replacing the frequency point information of each fallback cell in the first alternative cell set, which is stored before, by using the frequency point information of each fallback cell in the second alternative cell set.
Optionally, the terminal device further includes:
a sending module, configured to send the first measurement report/the second measurement report to a base station.
Optionally, the terminal device further includes:
and the sorting module is used for performing ascending/descending sorting of signal strength on each fallback cell in the first candidate cell set.
Optionally, the terminal further includes:
the judging module is used for judging whether the terminal equipment successfully falls back to a corresponding falling cell;
a reordering module, configured to reorder, according to signal strength, N-1 fallback cells in the first candidate cell set, except for the fallback cell corresponding to the terminal device, when the terminal device fails to fallback;
and the one-by-one fallback module is used for performing one-by-one fallback according to the rearranged frequency point information of the N-1 fallback cells from high to low in signal strength until the terminal equipment successfully falls back.
Compared with the prior art, the invention at least comprises the following beneficial effects: the method comprises the steps that after the terminal equipment completes joint attachment, configuration information of fallback cells is obtained, frequency point information is measured according to the configuration information, a measurement report is generated, then N fallback cells with the strongest signal intensity in the measurement report are selected as alternative cells, and finally the fallback cells fall back to the corresponding cells according to the frequency point information of the alternative cells, so that early measurement of the fallback cells is achieved, paging duration is shortened, user experience is improved.
Drawings
Fig. 1 is a flowchart of a cell fallback method according to an embodiment of the present invention;
fig. 2 is a flowchart of a cell fallback method according to a second embodiment of the present invention;
fig. 3 is a flowchart of a cell fallback method according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a terminal device according to a fourth embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Referring to fig. 1, fig. 1 is a flowchart of a cell fallback method according to an embodiment, where the method includes:
step S101: the terminal equipment acquires first configuration information;
the terminal device of this embodiment is a mobile terminal, and a 4G (fourth generation mobile communication technology) multimode card is used and a CSFB circuit switched fallback technology is selected to implement voice call, where the first configuration information includes information of multiple fallback cells configured by a base station for the terminal to fallback according to current cell information of the terminal device, where the information of the multiple fallback cells includes cell identifiers of the fallback cells and corresponding frequency point information, so that the terminal device measures frequency point information of the to-be-fallback cells and finally performs fallback according to the frequency point information of the cells.
Specifically, before the terminal device acquires the configuration information, the method further includes:
the terminal equipment starts a joint attachment process;
after the mobile terminal is started, starting a joint attachment process of the 4G multi-mode card, specifically, the 4G multi-mode card of the mobile terminal sends an attachment Request Attach Request message to a mobility management entity MME. Wherein the parameter Attach Type (Attach Type) indicates that the Attach is a combined EPS/IMSI (evolved Packet System/International Mobile Subscriber identity, evolved Packet System and International Mobile Subscriber identity) Attach flow, and the parameter indicates that the Mobile terminal has a circuit domain Fallback CS Fallback capability, then the MME sends an SGsAP-LOCATION-UPDATE-REQUEST message to the corresponding visitor LOCATION register VLR, the message includes parameters such as new LAI, IMSI of the 4G multimode card, MME name, and LOCATION UPDATE Type; VLR stores MME information and creates SGs association with 4G multimode cards under MME, VLR initiates a 4G multimode card position updating flow to a home location register HLR according to user information and location area information; VLR returns confirmation information to MME; and the MME sends an Attach Accept message to the mobile terminal to complete the joint attachment.
After the terminal equipment completes the joint attachment, a request for acquiring the configuration information of the fallback cells is sent to a base station, so that the base station sends first configuration information of a plurality of fallback cells, configured for the terminal equipment by the base station, for the terminal equipment to fallback to the terminal equipment.
Currently, most CSFB cell measurements are usually performed when it is monitored that a user may have a call behavior (for example, the user opens a dial interface, starts an earphone, and the like), and a measurement procedure of frequency point information is performed. In this embodiment, after the terminal device completes the joint attachment procedure, a measurement procedure is started to perform early measurement on a fallback cell, thereby achieving the purposes of reducing paging delay and providing user experience.
Step 102: the terminal equipment measures the frequency point information according to the first configuration information and generates a first measurement report;
after receiving the first configuration information, the terminal device measures frequency point information of the to-be-dropped cell under the corresponding cell identifier according to the cell identifier of the drop-back cell configured for the terminal device by the base station in the first configuration information, specifically measures the signal intensity of the frequency point information of each drop-back cell, and generates a first measurement report, wherein the first measurement report includes the signal intensity measurement report of each drop-back cell configured for the terminal device by the base station.
S103, the terminal equipment selects N fallback cells with the strongest signal strength in a first measurement report to form a first candidate cell set, wherein N is a positive integer;
specifically, in this embodiment, the terminal device selects the first N cells with the strongest signal strength in the first measurement report to form a first candidate fallback cell set, where the first candidate fallback cell set includes a plurality of first candidate fallback cells, and further, the number of N may be determined according to the signal strength of each first candidate fallback cell. For example, if the signal strengths of the first cells with the strongest signals in the measurement report are not different, the value of N may be relatively increased, and if the signal strengths of the first cells with the strongest signals in the measurement report are far different, the value of N may be correspondingly decreased.
And step S104, the terminal equipment falls back to the corresponding falling cell according to the frequency point information of the falling cells in the first candidate cell set.
At present, after a terminal device generates a measurement report, the measurement report generally needs to be sent to a base station, so that the base station indicates the terminal device to fall back to a corresponding cell according to the measurement report. However, when the tracking area TAI in which the mobile terminal is located spans multiple location areas LAI, the number of fallback areas provided by the base station eNB is multiple, and the mobile terminal needs to perform measurement on multiple cells, which prolongs call setup time and affects user experience. According to the embodiment, the terminal equipment can directly fall back to the corresponding cell according to the frequency point information of the N first candidate cells, so that the paging time is shortened, and the user experience is improved.
Specifically, when there is an incoming call to the 4G multimode card, the calling session control device to which the calling belongs sends a query request to the HLR according to the called number; the HLR feeds back MSC position information; the call session control equipment sends a call request to the MSC; the MSC sends a paging request to the MME according to the SGs interface information; the MME sends a paging request to the mobile terminal; the mobile terminal sends a fallback cell response to the MME; after the MME receives the response of the mobile terminal to the cell falling back, the MME sends an SGsAP-SERVICE-REQUEST message to the MSC; the mobile terminal releases RRC (Radio Resource Control) connection, and falls back to a suitable cell according to the stored frequency point information of the first cells with the best signals, and in the specific implementation process, the cell corresponding to the frequency point information with the strongest signal strength is usually selected to fall back, and the mobile terminal sends out a paging response to establish a call.
It should be noted that, in another embodiment of this embodiment, in order to avoid that the mobile terminal cannot directly fall back to the corresponding cell according to the frequency point information of the first candidate cell for a special reason, the indication may also be performed by the base station, and the mobile terminal performs the fall back after receiving the indication, specifically, the another embodiment further includes the steps of: and the terminal equipment sends the first measurement report to a base station so that the base station indicates the terminal equipment to fall back to a corresponding cell.
Specifically, after the terminal device selects N fallback cells with strongest signal strengths in the first measurement report to form the first candidate cell set, the method further includes:
the terminal equipment stores the frequency point information of each fallback cell in the first alternative cell set;
the dropping back of the terminal equipment to the corresponding drop-back cell according to the frequency point information of each drop-back cell in the first candidate cell set comprises the following steps:
the terminal equipment selects a fallback cell with the strongest signal strength in the first candidate cell set as a fallback cell corresponding to the terminal equipment;
and the terminal equipment falls back to the corresponding fall-back cell.
Optionally, the method further comprises:
and the terminal equipment carries out ascending/descending sequencing on the signal intensity of the first candidate cell.
In order to enable the terminal device to quickly find the cell with the strongest signal strength in the first candidate cell, so as to reduce the response time of the terminal device, the terminal device of this embodiment performs ascending order or descending order of signal strength on the first candidate cell, and when performing cell fallback, the terminal device can quickly find the cell with the strongest signal strength and perform fallback.
According to the cell fallback method provided by the embodiment, after the terminal device completes the joint attachment, the configuration information of the fallback cells is obtained, the frequency point information is measured according to the configuration information, a measurement report is generated, then, N fallback cells with the strongest signal strength in the measurement report are selected to form an alternative cell set, and finally, the measurement report is directly fallen back to the corresponding cell according to the frequency point information of all the fallback cells in the alternative cell set, so that the early measurement of the fallback cells is achieved, the paging duration is shortened, and the user experience is improved.
Referring to fig. 2, fig. 2 is a flowchart of a cell fallback method provided in the second embodiment, in order to solve the problems that when a terminal device performs cell reselection during a moving process, first configuration information allocated by a base station to the terminal device and a first measurement report submitted by the terminal device may no longer satisfy a fallback requirement of the terminal device, and the terminal device may need to perform measurement again on multiple cells when performing cell fallback, thereby prolonging call setup time and affecting user experience, where in the first embodiment, on the basis of the first embodiment, the first embodiment further includes step S204, step S205, step S206, step S207, and step S208 after step S103 and before step S104, and specifically includes the following steps:
step S201: the terminal equipment acquires first configuration information;
step S202: the terminal equipment measures the frequency point information according to the first configuration information and generates a first measurement report;
step S203, the terminal equipment selects N fallback cells with the strongest signal strength in a first measurement report to form a first candidate cell set, wherein N is a positive integer;
step S204: after the terminal equipment reselects the cell, sending a request for acquiring second configuration information to a base station so that the base station sends the second configuration information to the terminal equipment;
step S205: the terminal equipment acquires the second configuration information;
step S206: the terminal equipment measures frequency point information according to the second configuration information of the fallback cell and generates a second measurement report;
step S207: the terminal equipment selects N fallback cells with the strongest signal strength in a second measurement report to form a second candidate cell set;
step S208: the terminal equipment uses the frequency point information of each fallback cell in the second alternative cell set to replace the previously stored frequency point information of each fallback cell in the first alternative cell set;
step S209: and the terminal equipment falls back to the corresponding falling-back cell according to the frequency point information of each falling-back cell in the second alternative cell set.
Optionally, the method further comprises:
and the terminal equipment carries out ascending/descending sequencing on the signal intensity of the second candidate cell.
The method for generating the second measurement report and performing cell fallback according to the second measurement report by the terminal device in this embodiment may refer to embodiment one, and details are not described here.
In the cell fallback method provided by this embodiment, after performing cell reselection, the terminal device requests the base station for configuration information of a fallback cell again, and performs cell measurement again according to new configuration information to generate a latest measurement report, then forms a new candidate cell set according to the previous cells with the strongest signal strength in the measurement report, and finally falls back to a corresponding cell according to frequency point information of each fallback cell of the new candidate cell, so as to solve the problem that the cell signal strength measured before in the moving process of the terminal device no longer satisfies the fallback of the current location area of the terminal device, so that the terminal device may need to perform measurement of multiple cells again when performing cell fallback, thereby prolonging call setup time and the like.
Referring to fig. 3, fig. 3 is a flowchart of a cell fallback method provided in the third embodiment, in order to solve a situation that congestion or other abnormal reasons occurring when a plurality of mobile terminals currently use the same cell as a fallback cell may deny access when a terminal device performs fallback by using the cell with the strongest signal strength as the fallback cell of the terminal device, the present embodiment includes, in addition to steps S101 to S104 in the first embodiment, step S305, step S306, and step S307 after step S104, specifically, the following steps are included:
step S301: the terminal equipment acquires first configuration information;
step S302: the terminal equipment measures the frequency point information according to the first configuration information and generates a first measurement report;
step S303: the terminal equipment selects N fallback cells with the strongest signal strength in a first measurement report to form a first candidate cell set, wherein N is a positive integer;
step S304: the terminal equipment falls back to the corresponding falling cell according to the frequency point information of each falling cell in the first alternative cell set;
step S305: the terminal equipment judges whether the terminal equipment successfully falls back to a corresponding falling cell;
step S306: if the terminal equipment does not successfully fall back, the terminal equipment reorders the rest N-1 fall-back cells except the corresponding fall-back cell in the first candidate cell set according to the signal intensity;
in this embodiment, if the terminal device does not fall back successfully, the terminal device may delete the frequency point information of the cell corresponding to the first candidate cell when the terminal device falls back for the first time, and reorder the cells except the cell according to the signal strength.
Step S307: and the terminal equipment performs one-by-one fallback according to the reordered frequency point information of the N-1 fallback cells from high to low in signal intensity until the terminal equipment successfully falls back.
In the cell dropping method provided in this embodiment, the terminal device determines whether to drop back to the corresponding cell according to the dropping back, and when the terminal device does not successfully drop back to the corresponding cell, the terminal device reorders the signal strengths of the other candidate cells except for the corresponding cell, and performs the dropping back one by one according to the reordered candidate cells, thereby ensuring that the terminal device can drop back to the corresponding cell as soon as possible.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a terminal device according to a fourth embodiment, where the terminal device includes:
a first configuration obtaining module 10, configured to obtain first configuration information;
a first measurement report generating module 20, configured to perform measurement on the frequency point information according to the first configuration information and generate a first measurement report;
a first selecting module 30, configured to select N fallback cells with the strongest signal strength in the first measurement report to form a first candidate cell set, where N is a positive integer;
and a first fallback module 40, configured to fallback to the corresponding fallback cell according to the frequency point information of each fallback cell in the first candidate cell set.
Optionally, the terminal device further includes:
the joint attachment module is used for starting a joint attachment process;
the first configuration request module is used for sending a request for acquiring first configuration information to a base station after the joint attachment is completed, wherein the base station sends the first configuration information to the terminal equipment, and the first configuration information comprises cell identifiers of a plurality of fallback cells for the terminal equipment to fallback and corresponding frequency point information, wherein the cell identifiers are configured for the terminal equipment by the base station.
Optionally, the terminal device further includes:
the storage module is used for storing the frequency point information of each fallback cell in the first alternative cell set;
the first drop-back module comprises:
a selecting unit, configured to select a fallback cell with the strongest signal strength in the first candidate cell set as a fallback cell corresponding to the terminal device;
and the fallback unit is used for falling back to the corresponding fallback cell.
Optionally, the terminal device further includes:
a second configuration request module, configured to send a request for obtaining second configuration information to a base station after the terminal device performs cell reselection, so that the base station sends the second configuration information to the terminal device;
a second configuration obtaining module, configured to obtain the second configuration information;
a second measurement report generating module, configured to measure the frequency point information according to the second configuration information and generate a second measurement report;
a second selecting module, configured to select N fallback cells with the strongest signal strength in the second measurement report to form a second candidate cell set;
and the replacing module is used for replacing the frequency point information of each fallback cell in the first alternative cell set, which is stored before, by using the frequency point information of each fallback cell in the second alternative cell set.
Optionally, the terminal device further includes:
a sending module, configured to send the first measurement report/the second measurement report to a base station.
Optionally, the terminal device further includes:
and the sorting module is used for performing ascending/descending sorting of the signal intensity on each fallback cell in the first candidate cell set.
Optionally, the terminal further includes:
the judging module is used for judging whether the cell successfully falls back to the corresponding falling cell;
a reordering module, configured to, when the terminal device does not fall back successfully, reorder, by the terminal device according to signal strength, the remaining N-1 fallback cells in the first candidate cell set except for the corresponding fallback cell;
and the one-by-one fallback module is used for performing one-by-one fallback according to the rearranged frequency point information of the N-1 fallback cells from high to low in signal strength until the terminal equipment successfully falls back.
In the cell fallback system provided by this embodiment, after the terminal device completes joint attachment, the first configuration module acquires first configuration information configured by a base station for the terminal device, the first measurement report generation module performs measurement on frequency point information according to the first configuration information to generate a measurement report, then, the first selection module selects N fallback cells with strongest signal strength in the measurement report as first candidate cells, and the last fallback module falls back to a corresponding cell according to the frequency point information of the candidate cells to implement advanced measurement of the fallback cells, reduce paging duration, and improve user experience; furthermore, in this embodiment, a second configuration requesting module re-requests second configuration information from the base station when the terminal device performs cell reselection, a second configuration acquiring module acquires second configuration information re-allocated by the base station, then a second measurement report generating module performs measurement of frequency point information again according to the second configuration information and generates a second measurement report, a second selecting module selects N fallback cells with strongest number strength to form a second candidate cell set, and replaces frequency point information of each fallback cell in the second candidate cell with frequency point information stored before through a replacing module, so as to solve the problems that the cell signal strength measured before in the moving process of the terminal device no longer meets the fallback of the current location area of the terminal device, and the terminal device may need to perform measurement of multiple cells again when performing cell fallback, thereby prolonging call setup time and the like; further, in this embodiment, the terminal device directly drops back to the corresponding cell according to the frequency point information of the candidate cell instead of sending the measurement report to the base station, so that the base station indicates the drop back, thereby reducing the operation flow and solving the problems of call extension and the like caused by the fact that the base station indicates multiple cells to drop back for the terminal device when the tracking area spans multiple location areas.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (12)
1. A cell fallback method, comprising:
the terminal equipment acquires first configuration information;
the terminal equipment measures the frequency point information according to the first configuration information and generates a first measurement report;
the terminal equipment selects N fallback cells with the strongest signal strength in a first measurement report to form a first candidate cell set, wherein N is a positive integer;
the terminal equipment falls back to the corresponding falling-back cell according to the frequency point information of each falling-back cell in the first alternative cell set;
before the terminal device acquires the first configuration information, the method further includes:
the terminal equipment starts a combined attachment flow;
after the terminal device completes the joint attachment, a request for acquiring first configuration information is sent to a base station so that the base station sends the first configuration information to the terminal device, wherein the first configuration information comprises cell identifications and corresponding frequency point information of a plurality of fallback cells configured for the terminal device by the base station and used for the terminal device to fallback.
2. The method of claim 1, wherein after the terminal device selects the N fallback cells with the strongest signal strength in the first measurement report to form the first candidate cell set, further comprising:
the terminal equipment stores the frequency point information of each fallback cell in the first alternative cell set;
the dropping back of the terminal equipment to the corresponding drop-back cell according to the frequency point information of each drop-back cell in the first candidate cell set comprises the following steps:
the terminal equipment selects a fallback cell with the strongest signal strength in the first candidate cell set as a fallback cell corresponding to the terminal equipment;
and the terminal equipment falls back to the corresponding fall-back cell.
3. The method according to claim 2, wherein the terminal device falls back to the corresponding fallback cell according to the frequency point information of each fallback cell in the first candidate cell set, further comprising:
after the terminal equipment reselects a cell, sending a request for acquiring second configuration information to a base station so that the base station sends the second configuration information to the terminal equipment, wherein the second configuration information comprises cell identifiers of a plurality of fallback cells for the terminal equipment to fallback and reconfigured by the base station for the terminal equipment, and corresponding frequency point information;
the terminal equipment acquires the second configuration information;
the terminal equipment measures the frequency point information according to the second configuration information and generates a second measurement report;
the terminal equipment selects N fallback cells with the strongest signal strength in a second measurement report to form a second candidate cell set;
and the terminal equipment replaces the frequency point information of each fallback cell in the first alternative cell set, which is stored before, with the frequency point information of each fallback cell in the second alternative cell set.
4. The method according to claim 1 or 3, wherein after the terminal device performs the measurement of the frequency point information according to the first configuration information/the second configuration information and generates a first measurement report/a second measurement report, the method further comprises:
and the terminal equipment sends the first measurement report/the second measurement report to a base station.
5. The method of claim 1, further comprising:
and the terminal equipment performs ascending/descending sequencing of signal intensity on each fallback cell in the first candidate cell set.
6. The method of claim 5, further comprising:
the terminal equipment judges whether the terminal equipment successfully falls back to a corresponding fall-back cell;
if the terminal equipment does not successfully fall back, the terminal equipment reorders the rest N-1 fall-back cells in the first candidate cell set except the corresponding fall-back cell according to signal strength;
and the terminal equipment performs one-by-one fallback according to the reordered frequency point information of the N-1 fallback cells from high to low in signal intensity until the terminal equipment successfully falls back.
7. A terminal device, comprising:
the first configuration acquisition module is used for acquiring first configuration information;
a first measurement report generating module, configured to measure the frequency point information according to the first configuration information and generate a first measurement report;
a first selecting module, configured to select N fallback cells with the strongest signal strength in the first measurement report to form a first candidate cell set, where N is a positive integer;
a first fallback module, configured to fallback to a fallback cell corresponding to the terminal device according to the frequency point information of each fallback cell in the first candidate cell set;
further comprising:
the joint attachment module is used for starting a joint attachment process;
and the first configuration request module is used for sending a request for acquiring first configuration information to a base station after the joint attachment is completed so that the base station sends the first configuration information to the terminal equipment, wherein the first configuration information comprises cell identifications and corresponding frequency point information of a plurality of fallback cells for the terminal equipment to fallback, which are configured for the terminal equipment by the base station.
8. The terminal device of claim 7, further comprising:
the storage module is used for storing the frequency point information of each fallback cell in the first alternative cell set;
the first drop-back module comprises:
a selecting unit, configured to select a fallback cell with the strongest signal strength in the first candidate cell set as a fallback cell corresponding to the terminal device;
and the fallback unit is used for fallback to a fallback cell corresponding to the terminal device.
9. The terminal device according to claim 8, further comprising:
a second configuration request module, configured to send, after the terminal device performs cell reselection, a request for obtaining second configuration information to a base station, so that the base station sends the second configuration information to the terminal device, where the second configuration information includes cell identifiers of multiple fallback cells for the terminal device to fallback, and corresponding frequency point information, where the cell identifiers are reconfigured by the base station for the terminal device;
a second configuration obtaining module, configured to obtain the second configuration information;
a second measurement report generating module, configured to measure the frequency point information according to the second configuration information and generate a second measurement report;
a second selecting module, configured to select N fallback cells with the strongest signal strength in the second measurement report to form a second candidate cell set;
and the replacing module is used for replacing the frequency point information of each fallback cell in the first alternative cell set, which is stored before, by using the frequency point information of each fallback cell in the second alternative cell set.
10. The terminal device according to claim 7 or 9, further comprising:
a sending module, configured to send the first measurement report/the second measurement report to a base station.
11. The terminal device of claim 7, further comprising:
and the sorting module is used for performing ascending/descending sorting of the signal intensity on each fallback cell in the first candidate cell set.
12. The terminal device according to claim 11, further comprising:
the judging module is used for judging whether the terminal equipment successfully falls back to a corresponding falling cell;
a reordering module, configured to reorder, according to signal strength, N-1 fallback cells in the first candidate cell set, except for the fallback cell corresponding to the terminal device, when the terminal device fails to fallback;
and the one-by-one fallback module is used for performing one-by-one fallback according to the reordered frequency point information of the N-1 fallback cells from high to low in signal intensity until the terminal equipment successfully fallback.
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| CN110300437B (en) * | 2019-07-25 | 2021-06-22 | 中国联合网络通信集团有限公司 | Method, terminal and system for shortening CSFB (Circuit switched fallback) cell fall-back time |
| CN111314958B (en) * | 2020-02-19 | 2022-07-12 | 中国联合网络通信集团有限公司 | LAU updating method and system of mobile terminal, storage medium and mobile terminal |
| CN111836362A (en) * | 2020-07-13 | 2020-10-27 | 中国联合网络通信集团有限公司 | Method and device for establishing call |
| CN112333789A (en) * | 2020-11-16 | 2021-02-05 | 中国联合网络通信集团有限公司 | Calling method, calling device and terminal |
| CN113068235B (en) * | 2021-03-16 | 2022-10-28 | Oppo广东移动通信有限公司 | Circuit switched fallback method and device, computer readable storage medium and electronic equipment |
| CN113490200B (en) * | 2021-08-17 | 2022-08-26 | 中国联合网络通信集团有限公司 | CSFB calling method, MME, electronic device and medium |
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| CN105208611B (en) * | 2015-04-17 | 2018-03-09 | 广东欧珀移动通信有限公司 | A kind of circuit domain dropping that reduces redirects the method and device for connecting delay |
| CN106559845A (en) * | 2015-09-24 | 2017-04-05 | 联芯科技有限公司 | The maintaining method of multimode terminal, CSFB implementation methods and GSM neighboring BS information tables |
| CN107592644B (en) * | 2017-09-25 | 2020-11-06 | 中国联合网络通信集团有限公司 | Circuit domain fallback method, base station and terminal |
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