CN108616935B - Method and device for rapidly switching frequency points and mobile terminal - Google Patents
Method and device for rapidly switching frequency points and mobile terminal Download PDFInfo
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- CN108616935B CN108616935B CN201611129378.7A CN201611129378A CN108616935B CN 108616935 B CN108616935 B CN 108616935B CN 201611129378 A CN201611129378 A CN 201611129378A CN 108616935 B CN108616935 B CN 108616935B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/06—Reselecting a communication resource in the serving access point
Abstract
The invention provides a method and a device for rapidly switching frequency points and a mobile terminal. The method comprises the following steps: after a cell is searched, receiving a first system message sent by a base station where the cell is located; analyzing the first system message; receiving a second system message sent by a base station where the cell is located after the first system message is successfully analyzed; analyzing the second system message, wherein the second system message comprises an MFBI indication and a corresponding frequency point number; and when the MFBI indicates that the frequency point number is required to be switched, switching the current frequency point number to the corresponding frequency point number, and otherwise, keeping the current frequency point number. The invention can reduce the complexity of frequency point switching, is not easy to make mistakes and has good robustness.
Description
Technical Field
The invention relates to the technical field of network switching, in particular to a method and a device for quickly switching frequency points and a mobile terminal.
Background
L TE (L ong Term Evolution ) project is the Evolution of 3G, L TE system defines two modes of FDD (Frequency Division Duplex) and TDD (Time Division Duplex), which improves and enhances the 3G air access technology, and adopts OFDM (Orthogonal Frequency Division multiplexing) and MIMO (Multiple-Input Multiple-Output) technology as the only standard of wireless network Evolution.
The TDD L TE frequency Band is divided into three operators in China, the Band38 range is 2570-2619.9MHz is divided for middle movement, the corresponding frequency point number is 37750-38249, the Band41 is a large frequency Band, the frequency of the Band38 is included, the range is 2496 plus 2690MHz, the Band38 is moved inside, other sections are moved, communicated and telecom, respectively, the communication is 2535-2575 MHz, the movement is 2575-2635 MHz, the corresponding frequency point number is 40440 plus 41040, and the telecom is 2635-2655 MHz.
The frequency bands of the middle mobile band38 and the frequency band41 are partially overlapped, so that a plurality of mobile phones only supporting band41 but not supporting band38 can reside in a band38 frequency cell, or a plurality of mobile phones only supporting band38 but not supporting band41 can reside in a band41 frequency cell, and a multi-band indication strategy is designed for middle mobile. The frequency dot numbers are broadcast in the sib 1. Although the frequencies are the same, the frequency point numbers are different, and the terminal baseband system works according to the frequency point numbers, so the terminal must rapidly switch the frequency point numbers after solving to the sib1 to achieve the purpose of successfully accessing the cell.
If the frequency of the cell is the frequency overlapped by the band38 and the band40, after the terminal resolves the sib1, the frequency point number of the whole baseband system needs to be updated according to the frequency point number in the sib1, and the related modules include a radio frequency module, a cell search module, a measurement module and the like. The common practice in the prior art is to inform each module of a new frequency point number by adding a special message, and each module is updated and processed individually.
In the process of implementing the invention, the inventor finds that at least the following technical problems exist in the prior art:
in the prior art, the code amount and complexity are increased by adding a special message and telling each module the new frequency point number, so that the robustness of the whole system is deteriorated.
Disclosure of Invention
The invention provides a method and a device for rapidly switching frequency points and a mobile terminal, which can reduce the complexity of frequency point switching, are not easy to make mistakes and have good robustness.
In a first aspect, the present invention provides a method for fast switching frequency points, where the method includes:
receiving a first system message sent by a base station where a cell is located after the cell is searched;
analyzing the first system message;
receiving a second system message sent by a base station where the cell is located after the first system message is successfully analyzed;
analyzing the second system message, wherein the second system message comprises an MFBI (Multi frequency band indicator) indication and a corresponding frequency point number;
and when the MFBI indicates that the frequency point number is required to be switched, switching the current frequency point number to the corresponding frequency point number, and otherwise, keeping the current frequency point number.
Optionally, when the MFBI indicates that the frequency point number needs to be switched, switching the current frequency point number to the corresponding frequency point number includes:
and the wireless link control layer sends a switching message to the physical layer, so that the current frequency point number of the physical layer is switched to the corresponding frequency point number.
Optionally, in the handover message, the frequency point number changes, and the cell ID does not change.
Optionally, the first system message is MIB, and the second system message is SIB 1.
In a second aspect, the present invention provides a device for fast switching frequency points, where the device includes:
a first receiving unit, configured to receive a first system message sent by a base station where a cell is located after the cell is searched;
the first analysis unit is used for analyzing the first system message;
a second receiving unit, configured to receive a second system message sent by a base station where the cell is located after the first system message is successfully analyzed;
the second analysis unit is used for analyzing the second system message, and the second system message comprises an MFBI indication and a corresponding frequency point number;
and the switching unit is used for switching the current frequency point number to the corresponding frequency point number when the MFBI indicates that the frequency point number is required to be switched, and otherwise, keeping the current frequency point number.
Optionally, the switching unit is configured to send a switching message to the physical layer by the radio link control layer, so that the current frequency point number of the physical layer is switched to the corresponding frequency point number.
Optionally, in the handover message, the frequency point number changes, and the cell ID does not change.
Optionally, the first system message is MIB, and the second system message is SIB 1.
In a third aspect, the present invention provides a mobile terminal, where the mobile terminal includes the above apparatus for fast switching frequency points.
According to the method, the device and the mobile terminal for rapidly switching the frequency points, provided by the embodiment of the invention, in the terminal access process, when the mib message is solved and then the sib1 message is solved, a similar cell switching process is carried out according to the MFBI instruction of the sib1, and the terminal rapidly updates the frequency point numbers by a switching method of unchanging the cell id and changing the frequency point numbers to access the cells, so that the complexity is reduced. Because the cell switching process is the most basic process of the terminal, the process of multiplexing is not only simple, but also is not easy to make mistakes, and the robustness is good.
Drawings
Fig. 1 is a flowchart of a method for fast switching frequency points according to an embodiment of the present invention;
FIG. 2 is a flow chart of a conventional access of a terminal to a cell;
fig. 3 is a flowchart of a terminal accessing a cell when applying the method for fast switching frequency points according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an apparatus for fast switching frequency points according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a method for rapidly switching frequency points, as shown in fig. 1, the method comprises the following steps:
s11, receiving a first system message sent by a base station where a cell is located after the cell is searched;
s12, analyzing the first system message;
s13, receiving a second system message sent by the base station where the cell is located after the first system message is successfully analyzed;
s14, analyzing the second system message, wherein the second system message comprises an MFBI indication and a corresponding frequency point number;
and S15, when the MFBI indicates that the frequency point number needs to be switched, switching the current frequency point number to the corresponding frequency point number, and otherwise, keeping the current frequency point number.
According to the method for rapidly switching the frequency points, provided by the embodiment of the invention, in the terminal access process, when the mib message is solved and then the sib1 message is solved, a similar cell switching process is carried out according to the MFBI instruction of the sib1, and the terminal rapidly updates the frequency point numbers by a switching method of unchanging the frequency point numbers of the cell id and accesses the cell, so that the complexity is reduced. Because the cell switching process is the most basic process of the terminal, the process of multiplexing is not only simple, but also is not easy to make mistakes, and the robustness is good.
Optionally, when the MFBI indicates that the frequency point number needs to be switched, switching the current frequency point number to the corresponding frequency point number includes:
and the wireless link control layer sends a switching message to the physical layer, so that the current frequency point number of the physical layer is switched to the corresponding frequency point number.
Optionally, in the handover message, the frequency point number changes, and the cell ID does not change.
Optionally, the first system message is MIB, and the second system message is SIB 1.
The structure diagram of the existing terminal access cell is shown in fig. 2, wherein L TE baseband is located in the physical layer of the user plane protocol in the L TE system, the upper layer is located in the radio link control layer R L c, the upper layer sends a frequency sweep command, the L TE baseband performs frequency sweep processing to find out a proper base station transmitting frequency and frequency point, and reports the candidate frequency points obtained by frequency sweep, the upper layer sends a command for performing cell search according to the reported frequency point, the L TE baseband performs cell search processing, the strongest cell is reported after the cell search is completed, the upper layer sends a command for solving the mib system message, the L TE baseband succeeds in reporting the mib message, the upper layer sends a command for solving the sib system message, the L TE baseband succeeds in solving the sib message, and then the upper layer sends a command for accessing the cell.
When a certain frequency point is in an overlapping area of two frequency bands, namely one frequency, but two frequency point numbers exist, frequency point number switching needs to be performed, at this time, a method for rapidly switching frequency points needs to be adopted, MFBI indication needs to be added, a specific process is shown in fig. 3, the process is that an upper layer sends a frequency sweeping command, a L TE baseband performs frequency sweeping processing, a proper base station transmitting frequency and frequency point are found, and candidate frequency points obtained by frequency sweeping are reported, the upper layer sends a command for performing cell search according to a reported frequency point, a L baseband performs cell search processing, a strongest cell is reported after cell search is completed, the upper layer sends a command for solving mib system messages, a L TE baseband solving mib messages is reported after mib message decoding succeeds, the upper layer sends a command for solving sib messages, a L TE baseband solving message is reported successfully, the largest difference is reported after sib message decoding is successfully, a sib indication and a corresponding MFBI indication number is included in sib indication when the sib indication message is successfully sent after the sib indication is successfully, if the sib indication number is not needed to be updated, the current handover indication number when the sib indication is changed, the sib indication number is not needed, and the MFBI indication number is stated, the MFBI indication is stated, if the MFBI indication is not needed to be updated, the MFBI indication number when the current handover indication number when the sib indication is changed, the MFBI indication number when the sib indication is changed, the sib indication is stated, the MFBI indication number when the sib indication is changed, the MFBI indication number when the current phy indication is changed, the mfsib indication number when the mfsib indication is changed.
An embodiment of the present invention further provides a device for fast switching frequency points, and as shown in fig. 4, the device includes:
a first receiving unit 41, configured to receive a first system message sent by a base station where a cell is located after the cell is searched;
a first parsing unit 42, configured to parse the first system message;
a second receiving unit 43, configured to receive a second system message sent by the base station where the cell is located after the first system message is successfully analyzed;
a second parsing unit 44, configured to parse the second system message, where the second system message includes an MFBI indication and a corresponding frequency point number;
and a switching unit 45, configured to switch the current frequency point number to the corresponding frequency point number when the MFBI indicates that the frequency point number needs to be switched, and otherwise, keep the current frequency point number.
According to the device for rapidly switching the frequency points, provided by the embodiment of the invention, in the terminal access process, when the mib message is solved and then the sib1 message is solved, a process similar to cell switching is carried out according to the MFBI instruction of the sib1, and the terminal rapidly updates the frequency points by a switching method with unchanged cell id and frequency point change to access the cells, so that the complexity is reduced. Because the cell switching process is the most basic process of the terminal, the process of multiplexing is not only simple, but also is not easy to make mistakes, and the robustness is good.
Optionally, the switching unit 45 is configured to send a switching message to the physical layer by the radio link control layer, so that the current frequency point number of the physical layer is switched to the corresponding frequency point number.
Optionally, in the handover message, the frequency point number changes, and the cell ID does not change.
Optionally, the first system message is MIB, and the second system message is SIB 1.
The embodiment of the invention also provides a mobile terminal which comprises the device for rapidly switching the frequency point.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. A method for fast switching frequency points is characterized by comprising the following steps:
receiving a first system message sent by a base station where a cell is located after the cell is searched;
analyzing the first system message;
receiving a second system message sent by a base station where the cell is located after the first system message is successfully analyzed;
analyzing the second system message, wherein the second system message comprises an MFBI indication and a corresponding frequency point number;
when the MFBI indicates that the frequency point number is required to be switched, sending a switching message to a physical layer by a wireless link control layer to switch the current frequency point number of the physical layer to the corresponding frequency point number so that a baseband DSP system performs cell switching according to the switching message, and accessing a cell after the switching is finished, wherein in the switching message, the frequency point number is changed and the cell ID is not changed; otherwise, the current frequency point number is kept.
2. The method according to claim 1, wherein the first system message is MIB and the second system message is SIB 1.
3. A device for fast switching frequency points is characterized by comprising:
a first receiving unit, configured to receive a first system message sent by a base station where a cell is located after the cell is searched;
the first analysis unit is used for analyzing the first system message;
a second receiving unit, configured to receive a second system message sent by a base station where the cell is located after the first system message is successfully analyzed;
the second analysis unit is used for analyzing the second system message, and the second system message comprises an MFBI indication and a corresponding frequency point number;
a switching unit, configured to send a switching message to a physical layer through a radio link control layer when the MFBI indicates that a frequency point number needs to be switched is displayed, so that a current frequency point number of the physical layer is switched to the corresponding frequency point number, so that a baseband DSP system performs cell switching according to the switching message, and after the switching is completed, the baseband DSP system accesses a cell, where in the switching message, the frequency point number changes and the cell ID does not change; otherwise, the current frequency point number is kept.
4. The apparatus of claim 3, wherein the first system message is an MIB, and the second system message is an SIB 1.
5. A mobile terminal, characterized in that the mobile terminal comprises the device for fast switching frequency points according to any one of claims 3 to 4.
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| CN201611129378.7A CN108616935B (en) | 2016-12-09 | 2016-12-09 | Method and device for rapidly switching frequency points and mobile terminal |
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| CN201611129378.7A CN108616935B (en) | 2016-12-09 | 2016-12-09 | Method and device for rapidly switching frequency points and mobile terminal |
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| CN105357686A (en) * | 2014-08-18 | 2016-02-24 | 中国移动通信集团公司 | Frequency point number processing method and device, and user equipment (UE) |
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| WO2016150201A1 (en) * | 2015-03-25 | 2016-09-29 | 中兴通讯股份有限公司 | Method and apparatus for configuring carrier aggregation based on multi-band capability |
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| KR101791582B1 (en) * | 2013-04-05 | 2017-10-30 | 노키아 솔루션스 앤드 네트웍스 오와이 | Avoid key mismatch in security handling for multi frequency band |
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| WO2014181821A1 (en) * | 2013-05-10 | 2014-11-13 | 株式会社Ｎｔｔドコモ | Mobile communication system |
| CN105357686A (en) * | 2014-08-18 | 2016-02-24 | 中国移动通信集团公司 | Frequency point number processing method and device, and user equipment (UE) |
| CN105357687A (en) * | 2014-08-18 | 2016-02-24 | 中国移动通信集团公司 | Multi-band overlapped frequency spectrum identification method and device |
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