CN113260009A - Method for switching a communication connection to another channel (handover) - Google Patents
Method for switching a communication connection to another channel (handover) Download PDFInfo
- Publication number
- CN113260009A CN113260009A CN202110447388.XA CN202110447388A CN113260009A CN 113260009 A CN113260009 A CN 113260009A CN 202110447388 A CN202110447388 A CN 202110447388A CN 113260009 A CN113260009 A CN 113260009A
- Authority
- CN
- China
- Prior art keywords
- communication
- channel
- switching
- communication channel
- amplitude
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004891 communication Methods 0.000 title claims abstract description 163
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000005540 biological transmission Effects 0.000 claims abstract description 28
- 238000012216 screening Methods 0.000 claims abstract description 5
- 238000012546 transfer Methods 0.000 claims description 7
- 238000012360 testing method Methods 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 abstract description 4
- 238000010295 mobile communication Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
-
- 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
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention relates to the technical field of communication, and discloses a method for switching communication connection to another channel (switching), which comprises the following specific operations: establishing a plurality of communication channels; generating a communication switching notice from the voice frame or data frame to be switched, and recording the amplitude characteristic and frequency characteristic of the communication switching notice; obtaining amplitude characteristics and frequency characteristics of each communication channel, comparing and screening to determine available communication channels; detecting the transmission quality of the available communication channel, generating an optimal communication channel, and establishing a communication link; after receiving the complete voice frame or data frame transmission, the channel switching is carried out, and in the channel switching process, the communication link with the original base station is not interrupted, so that the communication quality is not influenced, and the communication channel under the same amplitude characteristic and frequency characteristic can ensure the switching efficiency, reduce the interference to the system and further reduce the blocking rate to the system.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a method for switching communication connection to another channel (switching).
Background
When mobile communications are started, which are characterized by a large number of various incompatible systems and mobile communication networks, which are often designed to be country-specific and manufacturer-specific, from which the transition to fully digital transmission of speech and signaling has begun to define standards in the european domain, wherein DECT (digital european cordless telephone) and GSM (global system for mobile communications) on the one hand and UMTS (universal mobile telecommunications service) on the other hand should be compared in further detail.
In principle, in known systems, the data to be transmitted are divided into units, so-called speech frames or data frames which are transmitted in succession, the size of which frames and thus the amount of data to be included therein and the processing of the data within the frames being defined in the respective standards in order to increase the data throughput and the data security (e.g. interleaving); the DECT standard is used to support private quasi-static communication services and is known as cordless ISDN due to its nature, by means of which DECT is particularly well suited for dense communication by seamless channel switching (seamless switching); seamless handover in DECT systems is in principle based on the use of a 32 kbit/s ADPCM (matched Delta pulse code modulation) speech codec, which provides data continuously; the speech frames on the ADPCM speech codec correspond to speech of one period of scan values; for example, when the scanning rate is 8kHz, and thus corresponds to one frame having a period of 125 μ s, and further, the speech frame to be encoded is transmitted without interleaving (interleaving) by a plurality of slots.
The purpose of channel switching is to realize seamless coverage of cellular mobile communication, that is, when a mobile subscriber (mobile station) enters another cell from one cell while the mobile subscriber is in a call state, in order to ensure the continuity of the call, the system transfers the connection control of the mobile station from one cell to another cell, and the process of transferring the mobile station in the call to a new service channel is called channel switching;
however, at present, when switching channels, due to the influence of environment, amplitude characteristics and frequency characteristics, the transmission rate of each communication channel is different, which causes inconvenience in switching between communication channels, and not only is the continuity of communication easily affected, but also the blocking rate of the system is increased.
Disclosure of Invention
It is an object of the present invention to provide a method for switching a communication connection to another channel (handover) to solve the problems set forth in the background art described above.
In order to achieve the purpose, the invention provides the following technical scheme: method for switching a communication connection to another channel (handover), the method being embodied as follows:
s1, establishing a plurality of base station-based communication channels and at least one satellite-based communication channel;
s2, generating a communication switching notice from the voice frame or data frame data to be transmitted on one communication channel, and recording the amplitude characteristic and frequency characteristic of the communication switching notice on the original communication channel;
s3, sending communication transfer notification signals, and determining available communication channels by each communication channel according to the amplitude characteristic and the frequency characteristic of the communication transfer notification signals through comparison and screening;
s4, detecting the available communication channel and the transmission quality of the communication channel in a certain time period, generating the best communication channel, setting as the target for waiting for the communication channel to be switched, and establishing a communication link;
s5, channel switching is performed after receiving a complete voice frame or data frame transmission.
As a further scheme of the invention: the amplitude characteristics comprise: the amplitude peak value, the amplitude fluctuation range and the amplitude fluctuation reference value of the generated communication switching notification signal;
the frequency characteristics include: the frequency distribution, the frequency fluctuation range, and the frequency peak of the generated communication diversion notification signal.
As a still further scheme of the invention: the method for detecting the transmission quality of the available communication channel comprises the following steps:
a1, receiving and sending test data packets to each communication channel within a certain time;
and A2, calculating the transmission rate according to the receiving and sending time and the receiving and sending data quantity.
As a still further scheme of the invention: the transmission rate of the communication channel is: (ii) a
Wherein C is the transmission rate, B is the communication channel bandwidth, and S/N is the signal-to-noise ratio.
As a still further scheme of the invention: the specific operation of establishing the communication link is as follows:
b1, recording the amplitude characteristic and the frequency characteristic of each communication channel, and calculating the weight value of the amplitude characteristic and the weight value of the frequency characteristic of the test data packet received on each communication channel;
b2, comprehensively evaluating according to the transmission quality of the communication channel, the weight value of the amplitude characteristic and the weight value of the frequency characteristic, establishing the optimal communication channel and establishing the communication link.
As a still further scheme of the invention: the weight values of the amplitude peak value, the amplitude fluctuation range and the amplitude fluctuation reference value are sorted from small to large, and the weight values of the frequency distribution, the frequency fluctuation range and the frequency peak value are sorted from large to small.
As a still further scheme of the invention: the channel switching operation requirements are as follows: and after the communication connection is confirmed to be in accordance with the optimal communication channel, switching the communication connection to the optimal communication channel, wherein in the switching process, the communication link between the communication connection and the original base station is not interrupted until the communication connection is completely switched to the optimal communication channel, and the original base station connection is not interrupted, so that seamless switching is realized.
Compared with the prior art, the invention has the beneficial effects that: the invention relates to a method for switching communication connection to another channel (switching), which comprises comparing amplitude characteristic and frequency characteristic of generated communication switching notification signal with amplitude characteristic and frequency characteristic of each communication channel to screen out available communication channel meeting switching requirement, further screening according to the transmission quality of screened available communication channel to determine the best communication channel, receiving the voice frame or data frame data to be transmitted completely to realize channel switching, and in switching process, the communication link with the original base station is not interrupted, thereby not affecting communication quality, ensuring switching efficiency and reducing interference to system, further reducing the rate of blocking of the system.
Drawings
Fig. 1 is a block flow diagram of a method of switching a communication connection to another channel (handover).
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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.
Referring to fig. 1, in an embodiment of the present invention, a method for switching a communication connection to another channel (handover) specifically operates as follows:
s1, establishing a plurality of base station-based communication channels and at least one satellite-based communication channel;
s2, generating a communication switching notice from the voice frame or data frame data to be switched on a communication channel, and recording the amplitude characteristic and frequency characteristic of the communication switching notice on the original communication channel; extracting the amplitude characteristic and the frequency characteristic by adopting an amplitude analysis method and a frequency domain analysis method;
wherein the amplitude features include: the amplitude peak value, the amplitude fluctuation range and the amplitude fluctuation reference value of the generated communication switching notification signal;
the frequency characteristics include: the frequency distribution, the frequency fluctuation range and the frequency peak value of the generated communication switching notification signal;
s3, sending communication transfer notification signals, and determining available communication channels by comparing and screening amplitude characteristics and frequency characteristics of the communication transfer notification signals through each communication channel;
s4, detecting the available communication channel and the transmission quality of the communication channel in a certain time period, generating the best communication channel, setting as the target for waiting for the communication channel to be switched, and establishing a communication link;
further, the method for detecting the transmission quality of the available communication channel comprises the following steps:
a1, receiving and sending test data packets to each communication channel within a certain time;
a2, calculating the transmission rate according to the receiving and sending time and the receiving and sending data volume;
wherein, the transmission rate of the communication channel is: (ii) a
Wherein C is transmission rate, B is communication channel bandwidth, and S/N is signal-to-noise ratio; therefore, the transmission rate of each communication channel is not only related to the broadband of the communication channel, but also has a more direct relation with the signal-to-noise ratio, so that how to establish an optimal communication channel in each communication channel is crucial to the switching efficiency of the communication connection;
still further, the specific operation of establishing the communication link is:
b1, recording the amplitude characteristic and the frequency characteristic of each communication channel, and calculating the weight value of the amplitude characteristic and the weight value of the frequency characteristic of the test data packet received on each communication channel;
b2, comprehensively evaluating according to the transmission quality of the communication channel, the weight value of the amplitude characteristic and the weight value of the frequency characteristic, establishing an optimal communication channel and establishing a communication link;
further, the comprehensive evaluation is to comprehensively evaluate the sum of the weight value of the amplitude peak value, the weight value of the amplitude fluctuation range, the weight value of the amplitude reference value, the weight value of the frequency distribution, the weight value of the frequency fluctuation range and the weight value of the frequency peak value;
and wherein, the weight values of the amplitude peak value, the amplitude fluctuation range and the amplitude fluctuation reference value are sorted from small to large, and the weight values of the frequency distribution, the frequency fluctuation range and the frequency peak value are sorted from large to small;
s5, after receiving the complete voice frame or data frame transmission, switching the channel;
further, the channel switching operation requirement is as follows: after the communication channel is confirmed to be in accordance with the optimal communication channel, the communication connection is switched to the optimal communication channel, the communication link between the communication connection and the original base station is not interrupted in the switching process, the original base station connection is not interrupted until the communication link is completely switched to the optimal communication channel, seamless switching is realized, the switching process is convenient without interruption, the communication quality is not influenced, the continuity of communication is ensured, meanwhile, the efficiency of communication channel switching (switching) can be ensured, and the interference to a system is reduced.
In summary, after generating the communication switching notification signal, the present invention compares the amplitude characteristic and the frequency characteristic of the signal with the amplitude characteristic and the frequency characteristic of each communication channel to screen out the available communication channels meeting the switching requirement in each communication channel, further screens according to the transmission quality of the screened available communication channels to determine the optimal communication channel, and then completely receives the data of the voice frame or the data frame to be transmitted and switched, and the communication link with the original base station is not interrupted during the switching process, so that the communication quality is not affected, and the communication channels under the same amplitude characteristic and frequency characteristic can ensure the efficiency of switching, reduce the interference to the system, and further reduce the blocking rate to the system.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. Method for switching a communication connection to another channel (handover), characterized in that the method operates in particular as follows:
s1, establishing a plurality of base station-based communication channels and at least one satellite-based communication channel;
s2, generating a communication switching notice from the voice frame or data frame data to be transmitted on one communication channel, and recording the amplitude characteristic and frequency characteristic of the communication switching notice on the original communication channel;
s3, sending communication transfer notification signals, and determining available communication channels by each communication channel according to the amplitude characteristic and the frequency characteristic of the communication transfer notification signals through comparison and screening;
s4, detecting the available communication channel and the transmission quality of the communication channel in a certain time period, generating the best communication channel, setting as the target for waiting for the communication channel to be switched, and establishing a communication link;
s5, channel switching is performed after receiving a complete voice frame or data frame transmission.
2. A method for switching a communication connection to another channel (handover) according to claim 1, wherein the amplitude characteristic comprises: the amplitude peak value, the amplitude fluctuation range and the amplitude fluctuation reference value of the generated communication switching notification signal;
the frequency characteristics include: the frequency distribution, the frequency fluctuation range, and the frequency peak of the generated communication diversion notification signal.
3. Method for switching a communication connection to another channel (handover) according to claim 1, characterized in that the method for detecting the transmission quality of the available communication channel comprises:
a1, receiving and sending test data packets to each communication channel within a certain time;
and A2, calculating the transmission rate according to the receiving and sending time and the receiving and sending data quantity.
4. A method for transferring a communication connection to another channel (handover) according to claim 3, characterised in that the transmission rate of the communication channel is: (ii) a
Wherein C is the transmission rate, B is the communication channel bandwidth, and S/N is the signal-to-noise ratio.
5. Method for transferring a communication connection to another channel (handover) according to claim 1, characterized in that the specific operations for establishing a communication link are:
b1, recording the amplitude characteristic and the frequency characteristic of each communication channel, and calculating the weight value of the amplitude characteristic and the weight value of the frequency characteristic of the test data packet received on each communication channel;
b2, comprehensively evaluating according to the transmission quality of the communication channel, the weight value of the amplitude characteristic and the weight value of the frequency characteristic, establishing the optimal communication channel and establishing the communication link.
6. Method for switching a communication connection to another channel (handover) according to claim 5, characterized in that the weight values of the amplitude peak-to-peak value, the amplitude fluctuation range and the amplitude fluctuation reference value are ordered from small to large, and the weight values of the frequency distribution, the frequency fluctuation range and the frequency peak value are ordered from large to small.
7. A method of transferring a communication connection to another channel (handover) according to claim 1, wherein the channel switching operation requirement is: and after the communication connection is confirmed to be in accordance with the optimal communication channel, switching the communication connection to the optimal communication channel, wherein in the switching process, the communication link between the communication connection and the original base station is not interrupted until the communication connection is completely switched to the optimal communication channel, and the original base station connection is not interrupted, so that seamless switching is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110447388.XA CN113260009A (en) | 2021-04-25 | 2021-04-25 | Method for switching a communication connection to another channel (handover) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110447388.XA CN113260009A (en) | 2021-04-25 | 2021-04-25 | Method for switching a communication connection to another channel (handover) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113260009A true CN113260009A (en) | 2021-08-13 |
Family
ID=77221551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110447388.XA Pending CN113260009A (en) | 2021-04-25 | 2021-04-25 | Method for switching a communication connection to another channel (handover) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113260009A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1337137A (en) * | 1999-01-13 | 2002-02-20 | 西门子公司 | Method for switching a communications link to another channel (handover) |
| CN103826275A (en) * | 2014-03-14 | 2014-05-28 | 中国人民解放军第三军医大学第二附属医院 | Method for automatically switching communication channel |
| CN107105462A (en) * | 2017-05-16 | 2017-08-29 | 维沃移动通信有限公司 | A kind of channel replacing options and mobile terminal |
| CN109726607A (en) * | 2018-12-29 | 2019-05-07 | 武汉万集信息技术有限公司 | Switching method and device, storage medium, the electronic device of communication channel |
| CN110121845A (en) * | 2016-11-17 | 2019-08-13 | 赛提科思飞以色列有限公司 | A kind of method and system for satellite communication |
| CN110622035A (en) * | 2017-03-16 | 2019-12-27 | 认知系统公司 | Selecting a wireless communication channel based on a signal quality metric |
| CN111211831A (en) * | 2020-01-13 | 2020-05-29 | 东方红卫星移动通信有限公司 | Multi-beam low-orbit satellite intelligent dynamic channel resource allocation method |
| CN111432453A (en) * | 2020-02-27 | 2020-07-17 | 深圳市镭神智能系统有限公司 | Communication channel determination method, device and equipment |
| CN112654057A (en) * | 2020-12-16 | 2021-04-13 | 西安烽火电子科技有限责任公司 | Bandwidth and rate self-adaptive communication method based on channel detection |
-
2021
- 2021-04-25 CN CN202110447388.XA patent/CN113260009A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1337137A (en) * | 1999-01-13 | 2002-02-20 | 西门子公司 | Method for switching a communications link to another channel (handover) |
| CN103826275A (en) * | 2014-03-14 | 2014-05-28 | 中国人民解放军第三军医大学第二附属医院 | Method for automatically switching communication channel |
| CN110121845A (en) * | 2016-11-17 | 2019-08-13 | 赛提科思飞以色列有限公司 | A kind of method and system for satellite communication |
| CN110622035A (en) * | 2017-03-16 | 2019-12-27 | 认知系统公司 | Selecting a wireless communication channel based on a signal quality metric |
| CN107105462A (en) * | 2017-05-16 | 2017-08-29 | 维沃移动通信有限公司 | A kind of channel replacing options and mobile terminal |
| CN109726607A (en) * | 2018-12-29 | 2019-05-07 | 武汉万集信息技术有限公司 | Switching method and device, storage medium, the electronic device of communication channel |
| CN111211831A (en) * | 2020-01-13 | 2020-05-29 | 东方红卫星移动通信有限公司 | Multi-beam low-orbit satellite intelligent dynamic channel resource allocation method |
| CN111432453A (en) * | 2020-02-27 | 2020-07-17 | 深圳市镭神智能系统有限公司 | Communication channel determination method, device and equipment |
| CN112654057A (en) * | 2020-12-16 | 2021-04-13 | 西安烽火电子科技有限责任公司 | Bandwidth and rate self-adaptive communication method based on channel detection |
Non-Patent Citations (2)
| Title |
|---|
| 李兴, 魏波, 钱敬华, 吴诗其: "第三代移动通信卫星/地面信道建模与仿真技术", 系统工程与电子技术, no. 03 * |
| 陈国, 胡修林, 张蕴玉: "基于质量评价技术的多信道语音选优决策系统", 系统工程与电子技术, no. 10 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6138020A (en) | Quality-based handover | |
| US6393286B1 (en) | Method for improving handovers between mobile communication systems | |
| US5327576A (en) | Handoff of a mobile station between half rate and full rate channels | |
| US6226520B1 (en) | Call set-up method in radio communication system | |
| AU675138B2 (en) | Reestablishment of call after disconnect | |
| US5724656A (en) | Method and apparatus for providing an improved caller interface in a fixed cellular communications system | |
| RU2195087C2 (en) | Method and device for simultaneous origination of numerous calls | |
| WO2007038042A1 (en) | Delivery of communications services in developing regions | |
| CN1784864A (en) | System and methods for seamlessly roaming between wireless wide area network and wireless local area network | |
| US20020098825A1 (en) | Apparatus for establishing a priority call in a fixed wireless access communication system | |
| US20020097694A1 (en) | Method for establishing a prioirity call in a fixed wireless access communication system | |
| CA2645437C (en) | Method for optimising the transmission resources by local loopback in a mobile radio communication cellular network, network and local adapters thereof | |
| RU2354051C2 (en) | Communications controller and method for communications connection flow control during repeated cell selection | |
| AU732247B2 (en) | A transmisson method and a cellular radio system | |
| GB2322047A (en) | Selecting speech encoder and data rate according to transmission conditions in a radio communication system | |
| CN113260009A (en) | Method for switching a communication connection to another channel (handover) | |
| US7302263B2 (en) | Handover in a mobile communication system | |
| CN101616432B (en) | Method for call quality test based on dual tone multi frequency | |
| EP0813347B1 (en) | Method and apparatus for screening a call in a wireless system | |
| CN101394660B (en) | Method and device for determining downlink sending mode | |
| US6542737B1 (en) | Method for checking speech channel of base station and vocoder of control station in mobile communication system | |
| JPH09510849A (en) | Decoding method | |
| JPH0833034A (en) | Communication channel switching device | |
| KR100400732B1 (en) | Data transmission method and Communication system | |
| JPH07504314A (en) | Wireless telephone systems using voice/data signals |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |