CN115623570B - Method and device for recovering cell residence - Google Patents
Method and device for recovering cell residence Download PDFInfo
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- CN115623570B CN115623570B CN202211552749.8A CN202211552749A CN115623570B CN 115623570 B CN115623570 B CN 115623570B CN 202211552749 A CN202211552749 A CN 202211552749A CN 115623570 B CN115623570 B CN 115623570B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention provides a method and a device for recovering cell residence, wherein the method for recovering cell residence comprises the following steps: judging whether the resident cells of the terminal before and after entering the power saving mode change; if the resident cell changes, acquiring a key system information block, wherein the key system information block comprises all information influencing the terminal to enter the connection state in the system information; and reading the key system information block to recover the cell residence. The invention can recover the cell residence only by reading the key system information block only when the residence cell changes, thereby greatly shortening the service time and reducing the power consumption compared with the whole reading in the prior art.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for recovering a cell residence.
Background
The current third generation partnership project (3 gpp) protocol specifies that after a Power Saving Mode (PSM) or Extended discontinuous reception mode (eDRX) wake-up, a terminal (UE) needs to perform cell search, read required system information to complete camping, and then resume normal service after camping. Here, the camping is the same as the camping procedure after starting up, and the reading of the system information necessary for camping in the cell includes: a Master Information Block (the Master Information Block-NB, the MIB-NB), a System Information Block one (the System Information Block Type1-NB, the SIB 1-NB), a System Information Block two (the System Information Block Type2-NB, the SIB 2-NB), a System Information Block three (the System Information Block Type3-NB, the SIB 3-NB), a System Information Block four (the System Information Block Type4-NB, the SIB 4-NB), a System Information Block five (the System Information Block Type5-NB, the SIB 5-NB), and a System Information Block twenty two (the System Information Block Type22-NB, the SIB 22-NB). But the flow of resident reading all system information after PSM wake-up is time consuming.
Since the protocol specifies that the UE does not need to receive paging during PSM, and the system information broadcast by the node B (eNB) may change during this period, it is ensured that the acquired system information is up-to-date by re-reading all the system information after PSM wake-up. In most cases, the system information corresponding to the cell where the UE resides is not changed or is changed very little, and the operation of re-reading all the system information of the resident cell prolongs service time and increases power consumption.
Therefore, the invention provides a method and a device for recovering cell residence, which are used for compressing service time and reducing power consumption.
Disclosure of Invention
The invention provides a method and a device for recovering cell residence, which solve the problems of long service time and large power consumption caused by the fact that a terminal needs to read all system information to complete cell residence recovery in a power saving ending mode in the prior art.
In a first aspect, the present invention provides a method for recovering cell residence, including: judging whether the resident cells of the terminal before and after entering the power saving mode change; if the resident cell changes, acquiring a key system information block, wherein the key system information block comprises all information influencing the terminal to enter the connection state in the system information; and reading the key system information block to recover the cell residence.
The beneficial effects are that: the invention can recover the cell residence only by reading the key system information block only when the residence cell changes, thereby greatly shortening the service time and reducing the power consumption compared with the whole reading in the prior art.
Optionally, before the determining whether the camping cell of the terminal before and after entering the power saving mode changes, the method includes: and saving system information of the terminal before entering the power saving mode. The beneficial effects are that: by storing the system information before the terminal enters the power saving mode, the system information stored before can be directly acquired without changing the resident cell, and the terminal does not need to read again, thereby further shortening the time.
Optionally, the saving system information of the terminal before entering the power saving mode includes: and storing all code streams corresponding to the system information of the terminal before entering the power saving mode into a nonvolatile memory, wherein the nonvolatile memory is used for ensuring that the system information is not lost when the terminal is powered off. The beneficial effects are that: and the code stream of the system information is effectively stored through the nonvolatile memory, and the system information is prevented from being lost when the terminal is powered off.
Optionally, the method for recovering cell camping further includes: if the resident cell is not changed, judging whether the label value in the main information block in the system information is changed or not; if the label value is not changed, decoding the code stream to recover the cell residence; and if the label value changes, the terminal reads the system information block I to acquire updated system information so as to recover the cell residence. The beneficial effects are that: the invention can also detect the condition that the resident cell is not changed but the label value of the main information block is changed, and update the system information in time.
Optionally, after the recovering the cell camping, the method includes: and if the terminal service processing is abnormal, re-reading the key system information block when the terminal enters an idle state. The beneficial effects are that: when the terminal service processing is abnormal, it indicates that the resident cell changes, and the key system information block needs to be read again.
Optionally, before the determining whether the camping cell of the terminal before and after entering the power saving mode changes, the method further includes: acquiring the sleep time of the terminal in the power saving mode; performing timing compensation and frequency offset adjustment on the network of the terminal according to the sleep duration so as to perform synchronous processing on the network of the terminal and a first resident cell, wherein the first resident cell is a resident cell before the terminal enters the power saving mode; and if the network of the terminal is successfully synchronized with the first resident cell, decoding the code stream to recover the cell resident. The beneficial effects are that: and performing timing compensation and frequency offset adjustment on the network of the terminal according to the sleep duration so as to ensure the synchronization of the network of the terminal and the first resident cell.
Optionally, the method for recovering cell camping further includes: and judging whether the service processing is required or not according to preset conditions, wherein the preset conditions comprise that the terminal receives a service processing request.
Optionally, the method for recovering cell camping further includes: acquiring a non-key system information block, wherein the non-key system information block comprises all information which does not influence the terminal to enter a connection state in the system information; the step of judging whether the service processing is required or not according to the preset conditions includes: when the terminal receives a service processing request, the terminal enters a connection state to process the service, and when the service processing is finished, the terminal enters an idle state to read the non-key system information block. The beneficial effects are that: the invention does not need to read all information, and the non-key system information block is read only when the terminal completes service processing or enters an idle state, thereby shortening the service processing time.
Optionally, the determining, according to a preset condition, whether service processing is required further includes: and when the terminal does not receive the service processing request, reading the non-key system information block.
Optionally, the determining whether to perform service processing according to a preset condition further includes: when receiving the service processing request in the process of reading the non-key system information block, the terminal enters a connected state to perform the service processing and suspends the reading of the non-key system information block; and when the service processing is finished, the terminal enters an idle state and continues to read the non-key system information block. The beneficial effects are that: since the non-key system information block does not affect the terminal to perform service processing, the terminal reads the non-key system information block after completing the service processing, the service processing can be performed without waiting for the completion of the reading of the non-key system information block, and the efficiency of the service processing can be improved.
Optionally, the key system information block includes: a master information block and a system information block I; the reading the key system information block includes: and reading the master information block and the system information block I.
Optionally, the key system information block further includes: a system information block II, a system information block fourteen and a system information block twenty-two; the reading the key system information block further includes: acquiring first scheduling information, and acquiring a first scheduling requirement according to the first scheduling information; determining whether to read a system information block II, a system information block fourteen and a system information block twenty-two according to the first scheduling requirement; and when two or more of the second system information block, the fourteen system information block and the twenty-two system information block are determined to be read, determining a reading sequence according to the first scheduling requirement, and finishing reading according to the reading sequence.
Optionally, the non-critical system information block includes: a system information block III, a system information block IV, a system information block V and a system information block sixteen; the reading of the non-critical system information block includes: acquiring second scheduling information, and acquiring a second scheduling requirement according to the second scheduling information; determining whether to read the system information block three, the system information block four, the system information block five and the system information block sixteen according to the second scheduling requirement; and when two or more of the third system information block, the fourth system information block, the fifth system information block and the sixteenth system information block are determined to be read, determining a reading sequence according to the second scheduling requirement, and finishing reading according to the reading sequence.
In a second aspect, the present invention provides an apparatus for recovering cell camping, configured to perform the method for recovering cell camping according to any one of the first aspect, including: the device comprises a judging module, an obtaining module and a reading module; the judging module is used for judging whether the resident cells of the terminal before and after entering the power saving mode are changed; the acquisition module is used for acquiring a key system information block when the resident cell changes, wherein the key system information block comprises all information which influences the terminal to enter the connection state in system information; the reading module is used for reading the key system information block so as to recover the cell residence.
For the beneficial effects of the second aspect, please refer to the description of the first aspect.
Drawings
Fig. 1 is a flowchart of an embodiment of a method for recovering a cell camping according to the present invention;
fig. 2 is a flowchart of another embodiment of a method for recovering cell camping according to the present invention;
fig. 3 is a schematic diagram of an apparatus for recovering cell camping according to the present invention.
Detailed Description
The technical solution in the embodiments of the present application is described below with reference to the drawings in the embodiments of the present application. In the description of the embodiments of the present application, the terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used in the specification of this application and the appended claims, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, such as "one or more", unless the context clearly indicates otherwise. It should also be understood that in the following embodiments of the present application, "at least one", "one or more" means one or more than two (including two). The term "and/or" is used to describe an association relationship that associates objects, meaning that three relationships may exist; for example, a and/or B, may represent: a exists singly, A and B exist simultaneously, and B exists singly, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless otherwise specifically stated. The term "coupled" includes both direct and indirect connections, unless otherwise noted. "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
In the embodiments of the present application, the words "exemplary" or "such as" are used herein to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
Whether the terminal is in the core network or is marked as Registered state (Registered) during PSM according to the protocol description. Therefore, after waking up from the PSM, there is no need to re-establish a Public Data Network (PDN) connection, but after waking up from the PSM, a terminal (UE) needs to perform cell search again, then read system information of a cell, and can send service data after completing cell camping. There are two kinds of problems, which may cause the PSM wakeup process to be too long, and also cause the service delay to be lengthened, and the power consumption of the terminal to become large. After the PSM wakes up, all system information is read again, which can ensure that the acquired system information is up-to-date. In most cases, the system information of the cell where the UE resides is not changed or is changed very little, so that the system information does not need to be read again or only part of the modified system information needs to be read.
All System Information, such as the Master Information Block (NB, MIB-NB), the System Information Block one (SIB 1-NB), the System Information Block two (the System Information Block Type2-NB, SIB 2-NB), the System Information Block three (the System Information Block Type3-NB, SIB 3-NB), the System Information Block four (the System Information Block Type4-NB, SIB 4-NB), the System Information Block five (the System Information Block Type5-NB, SIB 5-NB), the System Information Block SIB14-NB (the System Information Block Type14-NB, 14-SIB), the System Information Block 16-NB (the System Information Block Type16-NB, 16-NB), the System Information Block twenty (the System Information Block Type 22-NB), the System Information Block Type2-NB, the SIB22, and the like. In fact, during camping, the UE may first read some System Information blocks (SIB-NBs) directly related to service initiation, i.e. key SIB-NBs, and may wait until the service is ended and then continue reading when the UE returns to an idle state. The PSM wake-up process is lengthened due to the above problems, and meanwhile, the service delay is increased, which seriously affects the power consumption and service delay of a narrowband Internet of Things (NB-IoT) terminal, especially a terminal depending on battery power supply, and the influence is larger, and needs to be solved urgently.
In order to solve the above technical problem, the present invention provides a method and an apparatus for recovering cell camping, where a flow of the method for recovering cell camping is shown in fig. 1, and the method includes:
s101, judging whether the resident cells of the terminal before and after entering a power saving mode are changed or not;
s102, if the resident cell changes, acquiring a key system information block, wherein the key system information block comprises all information which influences the terminal to enter the connection state in the system information;
s103, reading the key system information block to recover the cell residence.
In this embodiment, the key system information block includes: MIB-NB, SIB1-NB. The invention can recover the cell residence only by reading the key system information block only when the residence cell changes, thereby greatly shortening the service time and reducing the power consumption compared with the whole reading in the prior art.
In some embodiments, before the determining whether the camping cell of the terminal before and after entering the power saving mode changes, the method includes: and saving system information of the terminal before entering the power saving mode. Optionally, all system information corresponding to the cell where the terminal resides before entering the power saving mode is saved. By storing all system information before the terminal enters the power saving mode, the system information stored before can be directly acquired without changing the resident cell, and the terminal does not need to read again, thereby further shortening the time. In yet another alternative, the MIB-NB and SIB1-NB corresponding to the cell where the terminal resides before entering the power saving mode are saved. By storing the MIB-NB and the SIB1-NB corresponding to the resident cell before the terminal enters the power saving mode, even if the resident cell changes, the result of the change of the resident cell can be directly obtained by acquiring the MIB-NB and the SIB1-NB which are stored in advance; if the resident cell is not changed, directly performing service processing by acquiring the pre-stored MIB-NB and SIB1-NB, and reading other system information after the service processing is completed.
In some embodiments, the saving system information of the terminal before entering the power saving mode includes: and storing all code streams corresponding to the system information of the terminal before entering the power saving mode into a nonvolatile memory, wherein the nonvolatile memory is used for ensuring that the system information is not lost when the terminal is powered off. And the code stream of the system information is effectively stored through the nonvolatile memory, and the system information is prevented from being lost when the terminal is powered off.
Illustratively, all System Information code streams of the serving cell, including code streams of System Information (SI) corresponding to the MIB-NB and SIB1-NB, are stored in the cell camping process. In some embodiments, the number of the SIs is at most 7, each SI carries one SIB-NB, and what needs to be saved may be: the code streams corresponding to SIB2-NB, SIB14-NB, SIB22-NB, SIB3-NB, SIB4-NB, SIB5-NB and SIB16-NB. In other embodiments, each SI may carry multiple SIB-NBs, that is, one SI may have both critical system information blocks and non-critical system information blocks, so that when reading the SI, while reading the critical system information blocks, the non-critical system information blocks carried by the SI are read together, and the other non-critical system information blocks are read again when the service is completed, which does not prolong the reading time and does not violate the object of the present invention.
In some embodiments, the method for recovering cell camping further includes: if the resident cell is not changed, judging whether a label value in the MIB-NB in the system information is changed or not; if the label value is not changed, decoding the code stream to recover the cell residence; and if the label value changes, the terminal reads the SIB1-NB to acquire updated system information so as to recover the cell residence. The invention can also detect the situation that the resident cell is not changed but the label value of the MIB-NB is changed, and update the system information in time.
In some embodiments, after the recovering the cell camping, the method further comprises: and if the terminal service processing is abnormal, re-reading the key system information block when the terminal enters an idle state. When the terminal service processing is abnormal, it indicates that the resident cell changes, and the key system information block needs to be read again.
In some embodiments, before the determining whether the camping cell of the terminal before and after entering the power saving mode changes, the method further includes: acquiring the sleep time of the terminal in the power saving mode; performing timing compensation and frequency offset adjustment on the network of the terminal according to the sleep duration so as to perform synchronous processing on the network of the terminal and a first resident cell, wherein the first resident cell is a resident cell before the terminal enters the power saving mode; and if the network of the terminal is successfully synchronized with the first resident cell, decoding the code stream to recover the cell resident. And performing timing compensation and frequency offset adjustment on the network of the terminal according to the sleep duration so as to ensure the synchronization of the network of the terminal and the first resident cell.
Illustratively, because the means for timing compensation or frequency offset adjustment of the network may be different under different sleep durations, in this example, the sleep duration is considered in three stages according to a time period less than or equal to a first preset time period, a time period greater than the first preset time period and less than or equal to a second preset time period, and a time period greater than the second preset time period. The value of the first preset time length is related to crystal oscillator deviation of the terminal, and the second preset time length is the maximum time length for storing Narrow-Band Internet of Things (NB-IoT) system information specified by a protocol stack. In the following examples, the first predetermined period of time is 30 minutes and the second predetermined period of time is 24 hours.
And when the sleep duration is less than or equal to the first preset duration, the UE bottom layer directly performs timing compensation and frequency offset estimation adjustment according to the sleep duration. In this way, timing with the network and correcting frequency offset can be recovered without performing cell search. UE recovers all system information from the last stored content, and after the recovery is successful, the UE completes cell residence and can perform service;
when the sleep time is longer than the first preset time and shorter than or equal to the second preset time, under the condition, due to the influence of the sleep time, the deviation of the timing can prevent the UE from recovering the accurate timing, so that the UE bottom layer needs to perform downlink synchronization with the network again to recover the timing and frequency offset estimation;
when the sleep duration is longer than the second preset duration, in this case, since the maximum effective duration of the system information is 24H as specified by the protocol, the PSM is recovered, and the UE performs downlink synchronization with the network again to recover the timing and frequency offset estimation.
During the deep sleep of the UE, if the system information is modified, the UE does not perceive the system information change because the UE does not listen for paging during the PSM. Furthermore, as described above, the UE may not read the system information after the PSM is woken up, and there are two types of policies that can ensure that the UE perceives that the system information is updated:
strategy one: if the UE reads the MIB-NB, whether a label value (value Tag) of the MIB-NB changes or not is judged, if yes, the SIB1-NB content is read, and then the latest SIB information is read according to the indication in the SIB1-NB; if the UE reads the MIB-NB, but the value Tag of the MIB-NB is not changed or changes accumulatively for one or more times, the value is the same as the previous value, the UE still recovers according to the stored system information code stream, then service is initiated, and if the subsequent flow is abnormal, such as RA failure, the UE triggers the UE to reread the key system information block when returning to an idle state; if the service is normal, the updated system information is proved not to affect the service, and the old one can be used continuously.
And (2) strategy two: if the UE does not read any system information, timing is recovered by the UE, and at the moment, if a service is initiated, the key system information block is re-read when the UE is triggered to return to an idle state through an exception in a service flow, such as RA failure.
In some embodiments, the method for recovering cell camping further includes: and judging whether the service processing is required or not according to preset conditions, wherein the preset conditions comprise that the terminal receives a service processing request.
In some embodiments, the method for recovering cell camping further includes: acquiring a non-key system information block, wherein the non-key system information block comprises all information which does not influence the terminal to enter a connection state in the system information; the step of judging whether the service processing is required or not according to the preset conditions comprises the following steps: when the terminal receives a service processing request, the terminal enters a connected state to perform the service processing, and when the service processing is completed, the terminal enters an idle state to read the non-key system information block. Optionally, the non-critical system information block includes: SIB3-NB, SIB4-NB, SIB5-NB, SIB16-NB. The invention does not need to read all information, and the non-key system information block is read only when the terminal completes service processing or enters an idle state, thereby shortening the service processing time.
In some embodiments, the determining whether the service processing is required according to the preset condition further includes: and when the terminal does not receive the service processing request, reading the non-key system information block.
In some embodiments, the determining, by using a preset condition, whether service processing is required further includes: when receiving the service processing request in the process of reading the non-key system information block, the terminal enters a connected state to perform the service processing and suspends the reading of the non-key system information block; and when the service processing is finished, the terminal enters an idle state and continues to read the non-key system information block. Since the non-key system information block does not affect the terminal to perform service processing, the terminal reads the non-key system information block after completing the service processing, the service processing can be performed without waiting for the completion of the reading of the non-key system information block, and the efficiency of the service processing can be improved.
In some embodiments, the critical system information block comprises: MIB-NB, SIB1-NB; the reading the key system information block includes: and reading the MIB-NB and the SIB1-NB.
In some embodiments, the critical system information block further comprises: SIB2-NB, SIB14-NB, SIB22-NB; the reading the key system information block further includes: acquiring first scheduling information, and acquiring a first scheduling requirement according to the first scheduling information; determining whether to read SIB2-NB, SIB14-NB, SIB22-NB according to the first scheduling requirement; and when two or more of the SIB2-NB, the SIB14-NB and the SIB22-NB are determined to be read, determining a reading sequence according to the first scheduling requirement, and completing reading according to the reading sequence. To describe the present embodiment in more detail, it is exemplified here.
In an example, when the first scheduling requirement is reading only the SIB2-NB, the SIB2-NB is read when the terminal has read the MIB-NB and the SIB1-NB.
Example two, when the first scheduling requirement is reading SIB2-NB and SIB14-NB, and the reading order is reading SIB2-NB first and then reading SIB14-NB, when the terminal finishes reading MIB-NB and SIB1-NB, the SIB2-NB is read first and then SIB14-NB is read.
In some embodiments, the non-critical system information block comprises: SIB3-NB, SIB4-NB, SIB5-NB, SIB16-NB; the reading the non-critical system information block includes: acquiring second scheduling information, and acquiring a second scheduling requirement according to the second scheduling information; determining whether to read the SIB3-NB, the SIB4-NB, the SIB5-NB, the SIB16-NB according to the second scheduling requirement; and when two or more of the SIB3-NB, the SIB4-NB, the SIB5-NB and the SIB16-NB are determined to be read, determining a reading sequence according to the second scheduling requirement, and finishing reading according to the reading sequence. To describe the present embodiment in more detail, it is exemplified here.
In an example, when the second scheduling requirement is reading only the SIB3-NB, the SIB3-NB is read when the terminal completes service processing.
Example two, when the second scheduling requirement is reading SIB3-NB and SIB4-NB, and the reading order is reading SIB3-NB first and reading SIB4-NB second, then when the terminal finishes reading the key system information block, reading SIB3-NB first and then reading SIB 4-NB.
To describe the method for recovering cell camping in more detail, which is provided by the present application, as illustrated in fig. 2, the steps of the method for recovering cell camping include:
s201, storing all code streams corresponding to system information of the terminal before entering a power saving mode into a nonvolatile memory;
s202, performing timing compensation and frequency offset adjustment on the network of the terminal according to the sleep duration;
s203, judging whether the resident cell changes, if so, executing S208, otherwise, executing S204;
s204, judging whether the label value in the MIB-NB changes, if so, executing S207, otherwise, executing S205;
s205, decoding the code stream to recover the cell residence;
s206, judging whether the terminal service processing is abnormal, if so, executing S208, otherwise, executing S213;
s207, reading the SIB1-NB to acquire the updated system information so as to recover the cell residence;
s208, acquiring a key system information block, and reading the key system information block to recover the cell residence;
s209, judging whether business processing is needed, if so, executing S210, otherwise, executing S212;
s210, the terminal enters a connection state to perform the service processing;
s211, judging whether the terminal service processing is abnormal or not, if so, executing S208, otherwise, executing S212;
s212, reading the non-critical system information block;
and S213, ending the flow.
For this embodiment, in S203, the result of whether the network of the terminal and the residential cell are synchronized is obtained by performing timing compensation and frequency offset adjustment on the network of the terminal according to the sleep duration. If the synchronization between the network of the terminal and the camped cell is successful as a result obtained in S203, S203 may determine that the camped cell has not changed and S204 may consider that the tag value in the MIB-NB has not changed. If the result obtained in S203 is that the synchronization between the network of the terminal and the camped cell fails, S203 may determine that the camped cell has changed, and perform S204 on the result to determine whether the tag value in the MIB-NB has changed. The judgment of whether the terminal service processing is abnormal in S206 and S211 is based on whether the terminal can smoothly execute and complete the service processing, if so, there is no abnormality, otherwise, there is an abnormality.
Based on the method for recovering cell camping provided in any of the foregoing embodiments, the present invention further provides an apparatus for recovering cell camping, which is used to execute the method for recovering cell camping according to any of the foregoing embodiments, as shown in fig. 3, including: a judging module 301, an obtaining module 302 and a reading module 303; the judging module 301 is configured to judge whether a cell where the terminal resides before and after entering the power saving mode changes; the obtaining module 302 is configured to obtain a key system information block when the residential cell changes, where the key system information block includes all information that affects the terminal to enter the connected state in system information; the reading module 303 is configured to read the key system information block to recover cell camping.
All relevant contents of the steps related to the above method embodiments may be referred to the functional description of the corresponding unit module, and are not described herein again.
The above description is only a specific implementation of the embodiments of the present application, but the scope of the embodiments of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the embodiments of the present application should be covered within the scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application shall be subject to the protection scope of the claims.
Claims (13)
1. A method for recovering cell camping, comprising:
acquiring the sleep duration of the terminal in a power saving mode; performing timing compensation and frequency offset adjustment on the network of the terminal according to the sleep duration so as to perform synchronous processing on the network of the terminal and a first resident cell, wherein the first resident cell is a resident cell before the terminal enters the power saving mode; if the network of the terminal is successfully synchronized with the first resident cell, decoding a code stream corresponding to the stored system information to recover the cell resident;
judging whether the resident cells of the terminal before and after entering the power saving mode change;
if the resident cell changes, acquiring a key system information block, wherein the key system information block comprises all information influencing the terminal to enter a connection state in system information;
and reading the key system information block to recover the cell residence.
2. The method of claim 1, wherein before the determining whether the camping cell of the terminal before or after entering the power saving mode changes, the method comprises: and saving system information of the terminal before entering the power saving mode.
3. The method of claim 2, wherein saving system information of the terminal before entering the power saving mode comprises: and storing all code streams corresponding to the system information of the terminal before entering the power saving mode into a nonvolatile memory, wherein the nonvolatile memory is used for ensuring that the system information is not lost when the terminal is powered off.
4. The method of claim 3, wherein the key system information block comprises: a master information block and a system information block I;
the reading the key system information block includes: and reading the master information block and the system information block I.
5. The method of claim 4, further comprising: if the resident cell is not changed, judging whether the label value in the main information block in the system information is changed or not;
if the label value is not changed, decoding the code stream to recover the cell residence;
and if the label value changes, the terminal reads the system information block I to acquire updated system information so as to recover the cell residence.
6. The method for recovering cell camping according to claim 5, comprising, after the recovering cell camping: and if the terminal service processing is abnormal, re-reading the key system information block when the terminal enters an idle state.
7. The method of claim 1, further comprising: and judging whether the service processing is required or not according to preset conditions, wherein the preset conditions comprise that the terminal receives a service processing request.
8. The method of claim 7, further comprising: acquiring a non-key system information block, wherein the non-key system information block comprises all information which does not influence the terminal to enter a connection state in the system information;
the step of judging whether the service processing is required or not according to the preset conditions includes:
when the terminal receives a service processing request, the terminal enters a connected state to perform the service processing, and when the service processing is completed, the terminal enters an idle state to read the non-key system information block.
9. The method of claim 8, wherein the determining whether the service processing is required according to the preset condition further comprises: and when the terminal does not receive the service processing request, reading the non-key system information block.
10. The method of claim 9, wherein the determining whether the service processing is required according to the preset condition further comprises:
when receiving the service processing request in the process of reading the non-key system information block, the terminal enters a connected state to perform the service processing and suspends the reading of the non-key system information block;
and when the service processing is finished, the terminal enters an idle state and continues to read the non-key system information block.
11. The method of claim 4, wherein the key system information block further comprises: a system information block II, a system information block fourteen and a system information block twenty-two;
the reading the key system information block further includes:
acquiring first scheduling information, and acquiring a first scheduling requirement according to the first scheduling information;
determining whether to read a system information block II, a system information block fourteen and a system information block twenty-two according to the first scheduling requirement;
and when two or more of the second system information block, the fourteen system information block and the twenty-two system information block are determined to be read, determining a reading sequence according to the first scheduling requirement, and finishing reading according to the reading sequence.
12. The method of claim 8 or 9, wherein the non-critical system information block comprises: a system information block III, a system information block IV, a system information block V and a system information block sixteen;
the reading the non-critical system information block includes:
acquiring second scheduling information, and acquiring a second scheduling requirement according to the second scheduling information;
determining whether to read the system information block three, the system information block four, the system information block five and the system information block sixteen according to the second scheduling requirement;
and when two or more of the system information block three, the system information block four, the system information block five and the system information block sixteen are determined to be read, determining a reading sequence according to the second scheduling requirement, and finishing reading according to the reading sequence.
13. An apparatus for recovering cell camping, the apparatus being configured to perform the method for recovering cell camping according to any one of claims 1-12, comprising: the device comprises a judging module, an obtaining module and a reading module;
the judging module is used for judging whether the resident cells of the terminal before and after entering the power saving mode are changed;
the acquisition module is used for acquiring a key system information block when the resident cell changes, wherein the key system information block comprises all information which influences the terminal to enter a connection state in system information;
the reading module is used for reading the key system information block so as to recover the cell residence.
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