CN101137119B - Method for transmitting origination message in push-to-talk mode - Google Patents
Method for transmitting origination message in push-to-talk mode Download PDFInfo
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- CN101137119B CN101137119B CN2007100011843A CN200710001184A CN101137119B CN 101137119 B CN101137119 B CN 101137119B CN 2007100011843 A CN2007100011843 A CN 2007100011843A CN 200710001184 A CN200710001184 A CN 200710001184A CN 101137119 B CN101137119 B CN 101137119B
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Abstract
On the basis of the configured common accessing channel on the base station side, a special rapid accessing channel (RAC) is configured according to the conversation mode PTT. Within the RAC serial number range, the terminal uses Hash algorithm to select a RAC, calculates the access time slot (ATS) length according to the length of PTT business start calling message and selects the mentioned ATS to send accessing channel start calling message. This invention reduces the ATS length, shortens the connection time, lowers the accessing collision chance and increases channel capacity.
Description
Technical field
The present invention relates to a kind ofly in professional group system GoTa (Global open Trunkingarchitecture, based on open cluster architecture), send the method for PTT (press to talk, press-to-talk) call message.
Background technology
Connecting time is short, is the distinguishing feature that cluster communication service is different from other business, and therefore, reducing connecting time is a key subject that improves the GoTa systematic function.
The operation principle of access channel is as follows: the length of an Access Channel Slot is (3+MAX_CAP_SZ)+(1+PAM_SZ) individual access channel frame.Access Channel Slot starts from tmod[4+MAX_CAP_SZ+PAM_SZ]=0 access channel frame.Here t is to be the system time of unit with the frame, and MAX_CAP_SZ is that maximum access package is long, and PAM_SZ is maximum Access Preamble length, can be with reference to the 3GPP2 agreement.
One time access exploration is made up of access channel prefix and access channel message bag.On each access channel, travelling carriage is begun to transmit complete zero prefix that 1+PAM_SZ access channel frame formed by the section start of this time slot, and travelling carriage sends an access channel message bag immediately after prefix.
Present GoTa system, which kind of PTT business no matter, comprise traditional group, enhancing group, individual call etc., call message is all the same with other general service of existing in the system, on identical access channel, send, use same access channel prefix and insert the message packet length, just defer to same access slot length.
For the PTT business, the shortcoming that this call message sends is: professional and other is professional and when depositing as PTT, must be subject in the system other business to the requirement of call message and access channel.Exhale for once rising, if because collision, and an access slot begin do not send successful access exploration, perhaps be not able to catch up with the border of an access slot, terminal will wait until that the border of next access slot could send an access exploration so, if just fail to send on first border, will wait for a period of time so is deferred to next boundary of time slot arrival, could send second access exploration, times that layer two confirms are also with regard to phase delay.
Summary of the invention
The technical problem to be solved in the present invention is the method that proposes to send in a kind of press-to-talk mode call message, has shortened the business continuing duration.
In order to solve the problems of the technologies described above, the present invention proposes the method that sends call message in a kind of press-to-talk mode, on the basis of the common access channel that base station side has disposed, the quick access channel of configuration press-to-talk mode PTT special use; Terminal utilizes hash algorithm to select a quick access channel in the serial number range of described quick access channel, and calculates access slot length according to the length gauge of the professional call message of PTT, selects described access slot to send the access channel call message.
Further, said method also can have following characteristics: in (1) multiple business and the system that deposits, dispose common access channel in base station side, on the basis of the common access channel that disposes, the quick access channel of configuration press-to-talk mode PTT, and structure access parameter Overhead Message and PTT system parameters Overhead Message; (2) base station side sends to terminal with access parameter Overhead Message and PTT system parameters Overhead Message, and described access parameter Overhead Message comprises the serial number range information of common access channel; PTT system parameters Overhead Message comprises the number of the prefix length of quick access channel, quick access channel message packet length and quick access channel, wherein, fast prefix length, the access channel message packet length of access channel are to determine and calculate according to the length of PTT call message; (3) terminal is according to the described access parameter Overhead Message and the PTT system parameters Overhead Message that receive, calculate the channel designator scope and the access slot length of quick access channel, and utilize hash algorithm to select a quick access channel, send the access channel call message.
Further, said method also can have following characteristics: in the step (3), terminal receives the access parameter Overhead Message, obtain the maximum sequence number of common access channel, terminal is by PTT system parameters Overhead Message, obtain the number of quick access channel under this contained fan, addition obtains the channel designator maximum of quick access channel, and minimum value then adds 1 for the maximum sequence number of common access channel.
Further, said method also can have following characteristics: in the step (3), terminal calculates access slot length according to the prefix length and the quick access channel message packet length of the quick access channel that carries in the PTT system parameters Overhead Message.
Further, said method also can have following characteristics: step (1) is further divided into: (11) dispose prefix length, the access channel message packet length of quick access channel under the carrier frequency parameter of backstage, and its quick access channel number with configuration is synchronized to the base station side database; (12) database management module notice configuration application module CAP upgrades PTT system parameters Overhead Message and the new quick access channel of configuration; (13) CAP sends the PTT system parameters Overhead Message upgraded and the notice of the quick access channel of configuration to channel board, and channel board is the quick access channel of configuration on the Channel Elements of regulation.
Further, said method also can have following characteristics: in the step (12), database management module calculates the number of quick access channel according to the quick access channel bar number of backstage actual disposition.
Further, said method also can have following characteristics: in the step (12), database management module notice CAP upgrades PTT system parameters Overhead Message, CAP obtains the prefix length of quick access channel, quick access channel message packet length information and quick access channel number from database, and described information is write PTT system parameters Overhead Message; The new quick access channel of database management module notice CAP configuration, CAP obtains the prefix length of quick access channel, quick access channel message packet length information from database.
Further, said method also can have following characteristics: in the step (12), CAP from the mode that database obtains quick access channel prefix length, quick access channel message packet length information is: when database management module notice CAP disposes new quick access channel, directly described information is passed to CAP; Perhaps database only sends configuration notification, when CAP receives this notice, calls database interface, and database returns described information.
Further, said method also can have following characteristics: in the step (13), CAP sends the notice that disposes quick access channel to channel board, the prefix length of quick access channel, quick access channel message packet length is replaced the access channel prefix length and the access channel message packet length of common access channel.
Further, said method also can have following characteristics: in the step (3), terminal sends the call message of compression on described quick access channel, and promptly described call message is the redundant field concerning the PTT business in three message bodies of compression protocol middle level.
Compared with prior art, the inventive method has been the PTT business configuration special-purpose quick access channel, and the length of minimizing PTT call message, redundant field in three message bodies of compression protocol middle level concerning the PTT business, make the PTT call message short as far as possible, can in short as far as possible access slot, finish transmission, thereby, reduce the length of access slot, shortened connecting time.And reduced the chance that inserts collision, increased channel capacity.
Description of drawings
Fig. 1 is the method flow diagram among the embodiment.
Fig. 2 is the method flow diagram of the quick access channel of configuration among the embodiment.
Embodiment
If the PTT business can send on the access channel of special use, then can break away from the restriction of general service to access slot length, under the situation that satisfies the transmission of an access message, can be as required the time slot of access channel be shortened, so, stand-by period in this case will shorten, and call message also can reduce to the times that layer two confirms, thereby had reduced connecting time.Quick access channel set forth in the present invention just is based on this principle generation.
Describe the present invention in detail below in conjunction with drawings and Examples.
Step 110 in multiple business and the system that deposits, disposes common access channel in base station side, on the basis of the common access channel of configuration, and the quick access channel of configuration PTT special use, and structure access parameter Overhead Message and PTT system parameters Overhead Message;
Respective field represents whether there is quick access channel in the PTT system parameters Overhead Message.
Step 120, base station side sends to terminal with the access parameter Overhead Message, and described access parameter Overhead Message comprises the serial number range of common access channel and the relevant parameter of common access channel;
Described access parameter Overhead Message is the Overhead Message of stipulating in IS 2000 agreements, and the parameter of common access channel must write the access parameter Overhead Message.
Step 130, base station side sends to terminal with PTT system parameters Overhead Message, writes the number of the prefix length of quick access channel, quick access channel message packet length, quick access channel in the described PTT system parameters Overhead Message;
PTT system parameters Overhead Message be define in the GoTa standard Overhead Message.The transmission of PTT system parameters Overhead Message and access parameter Overhead Message is not distinguished successively, and 1.28s sends once at least.
Step 140, terminal receive access parameter Overhead Message and PTT system parameters Overhead Message, and according to described message, calculate the channel designator scope of quick access channel; Then, terminal utilizes Hash (HASH) algorithm to select a quick access channel on quick access channel, according to the calculation of parameter access slot length of carrying in the PTT system parameters Overhead Message, and sends the access channel call message.
In not influence system, on the basis of other business, be the independent access channel of PTT business configuration, for original access channel compatibility, fast the access channel sequence number all is positioned at after the common access channel.Terminal receives the access parameter Overhead Message, obtains the maximum sequence number ACC_CHAN of common access channel; Terminal learns whether there is quick access channel by PTT system parameters Overhead Message, and the number QUICK_ACC_CH_NUM of quick access channel under this contained fan.When having quick access channel, the maximum sequence number of common access channel is added 1, obtain the channel designator minimum value of quick access channel; The maximum sequence number of common access channel adds the number of quick access channel, obtains the channel designator maximum of quick access channel, thereby, determined the serial number range of quick access channel.
When having quick access channel, general service rises on common access channel and exhales, the call message of PTT business is sending on the access channel fast, this quick access channel is by the HASH algorithm of GoTa terminal according to similar common access channel, is utilizing Hash HASH algorithm to select a quick access channel on the access channel fast.If there is no quick access channel then can only send on common access channel.
According to the prefix length and the quick access channel message packet length of the quick access channel that carries in the PTT system parameters Overhead Message, calculate access slot length, and select suitable access slot to send, connecting time is shortened.Because, when the PTT business when common access channel sends, the length of its call message is smaller or equal to the access slot length of common access channel, but still the time slot of determining according to common access channel sends message; When the PTT business when fast access channel sends, the length of its call message equals the access slot length of quick access channel; So fast the access slot length of access channel is smaller or equal to the access slot length of common access channel, call message satisfies on the less quick access channel of time slot value and sends call message.
Because fast the access slot length requirement of access channel is short, compress later PTT business and can satisfy better on the time slot of quick access channel and send.So, the professional length that reduces the PTT call message of PTT, redundant field in three message bodies of compression protocol middle level concerning the PTT business, use the call message after the compression can on short as far as possible access slot, send the call message of PTT, and satisfy to have shortened under the situation of business demand as far as possible and exhale the time.
Figure 2 shows that the method flow diagram of the quick access channel of configuration in the embodiment step 110, may further comprise the steps:
Step 210, prefix length, the access channel message packet length of the quick access channel of configuration under the carrier frequency parameter of backstage;
Fast the prefix length of access channel, access channel message packet length can be determined and calculate according to the length of call message, and by the backstage setting, the assurance call message can distribute in an access slot length and get final product.Described call message is the redundant field concerning the PTT business in three message bodies of compression protocol middle level.All quick access channel access slot length are identical.
Step 220, during data sync, fast the prefix length of access channel, the number of the quick access channel of access channel message packet length, configuration is synchronized to base station side BTS database fast, other relevant information of quick access channel of configuration (these information can referring to the relevant criterion of common access channel) also is synchronized to database;
The quick number of access channel is that the quick access channel bar number according to the backstage actual disposition calculates.
Step 230, database management module notice CAP upgrades PTT system parameters Overhead Message and the new quick access channel of configuration;
Database management module notice CAP upgrades PTT system parameters Overhead Message, CAP obtains the prefix length of quick access channel, quick access channel message packet length information and quick access channel number from database, and described information is write PTT system parameters Overhead Message;
The new quick access channel of database management module notice CAP configuration, described CAP obtains the prefix length of quick access channel, quick access channel message packet length information and the relevant parameter of other access channel from database.
In this step CAP from database obtain the prefix length of above-mentioned quick access channel, fast during information such as access channel message packet length information, dual mode is arranged, a kind of when being the new quick access channel of database management module notice CAP configuration, directly the relevant information of above-mentioned quick access channel is passed to CAP; Another kind is that database only sends configuration notification, when CAP receives this notice, calls database interface, and database returns the prefix length of the quick access channel under this contained fan and other relevant parameter of quick access channel message packet length and access channel.In addition, CAP also can call database interface when not receiving database notification, thereby obtains above-mentioned information.
In the realization of reality, when database disposes new quick access channel at notice CAP, quick access channel number can not sent to CAP, there are how many bar access channels will notify how many times CAP.When having only the PTT of renewal system parameters Overhead Message, just should return to CAP by quick access channel number.
Step 240, CAP sends the PTT system parameters Overhead Message upgraded and the notice of the quick access channel of configuration to channel board, the access channel prefix length and the access channel message packet length that the prefix length of quick access channel, quick access channel message packet length are replaced common access channel, other parameter disposes quick access channel with common access channel on the Channel Elements of regulation.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make corresponding change and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (9)
1. send the method for call message in the press-to-talk mode, on the basis of the common access channel that base station side has disposed, the quick access channel of configuration press-to-talk mode PTT special use, described quick access channel is the special-purpose access channel of PTT business, and the slot length of its this channel of PTT service access inserts the slot length of common access channel less than general service; Terminal utilizes hash algorithm to select a quick access channel in the serial number range of described quick access channel, and calculates access slot length according to the length gauge of the professional call message of PTT, selects described access slot to send the access channel call message;
Specifically may further comprise the steps: in (1) multiple business and the system that deposits, dispose common access channel in base station side, on the basis of the common access channel that disposes, the quick access channel of configuration press-to-talk mode PTT, and structure access parameter Overhead Message and PTT system parameters Overhead Message;
(2) base station side sends to terminal with access parameter Overhead Message and PTT system parameters Overhead Message, and described access parameter Overhead Message comprises the serial number range information of common access channel; PTT system parameters Overhead Message comprises the number of the prefix length of quick access channel, quick access channel message packet length and quick access channel, wherein, fast prefix length, the access channel message packet length of access channel are to determine and calculate according to the length of PTT call message;
(3) terminal is according to the described access parameter Overhead Message and the PTT system parameters Overhead Message that receive, calculate the channel designator scope and the access slot length of quick access channel, and utilize hash algorithm to select a quick access channel, send the access channel call message.
2. method according to claim 1 is characterized in that:
In the step (3), terminal receives the access parameter Overhead Message, obtain the maximum sequence number of common access channel, terminal is by PTT system parameters Overhead Message, obtain the number of quick access channel under the contained fan, addition obtains the channel designator maximum of quick access channel, and minimum value then adds 1 for the maximum sequence number of common access channel.
3. method according to claim 1 is characterized in that:
In the step (3), terminal calculates access slot length according to the prefix length and the quick access channel message packet length of the quick access channel that carries in the PTT system parameters Overhead Message.
4. method according to claim 1 is characterized in that step (1) is further divided into:
(11) under the carrier frequency parameter of backstage the configuration quick access channel prefix length, access channel message packet length, and with its with the configuration quick access channel number be synchronized to the base station side database;
(12) database management module notice configuration application module CAP upgrades PTT system parameters Overhead Message and the new quick access channel of configuration;
(13) CAP sends the PTT system parameters Overhead Message upgraded and the notice of the quick access channel of configuration to channel board, and channel board is the quick access channel of configuration on the Channel Elements of regulation.
5. as method as described in the claim 4, it is characterized in that:
Step (11) further comprises, calculates the number of quick access channel according to the quick access channel bar number of backstage actual disposition.
6. as method as described in the claim 4, it is characterized in that:
In the step (12), database management module notice CAP upgrades PTT system parameters Overhead Message, CAP obtains the prefix length of quick access channel, quick access channel message packet length information and quick access channel number from database, and will comprise that the full detail of the prefix length of described quick access channel, quick access channel message packet length information and quick access channel number writes PTT system parameters Overhead Message; The new quick access channel of database management module notice CAP configuration, CAP obtains the prefix length of quick access channel, quick access channel message packet length information from database.
7. as method as described in the claim 6, it is characterized in that:
In the step (12), CAP from the mode that database obtains quick access channel prefix length, quick access channel message packet length information is: when database management module notice CAP disposes new quick access channel, directly the prefix length and the quick access channel message packet length information of described quick access channel are passed to CAP; Perhaps database only sends configuration notification, when CAP receives this notice, calls database interface, and database returns the prefix length and the quick access channel message packet length information of described quick access channel.
8. as method as described in the claim 4, it is characterized in that:
In the step (13), CAP sends the notice that disposes quick access channel to channel board, the prefix length of quick access channel, quick access channel message packet length is replaced the access channel prefix length and the access channel message packet length of common access channel.
9. method according to claim 1 is characterized in that:
In the step (3), terminal sends the call message of compression on described quick access channel, and promptly described call message is the redundant field concerning the PTT business in three message bodies of compression protocol middle level.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007100011843A CN101137119B (en) | 2007-01-19 | 2007-01-19 | Method for transmitting origination message in push-to-talk mode |
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| CN2007100011843A CN101137119B (en) | 2007-01-19 | 2007-01-19 | Method for transmitting origination message in push-to-talk mode |
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| CN101137119A CN101137119A (en) | 2008-03-05 |
| CN101137119B true CN101137119B (en) | 2010-06-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101990309A (en) * | 2009-08-06 | 2011-03-23 | 中兴通讯股份有限公司 | Terminal access method and terminal |
| CN102711272B (en) * | 2012-06-08 | 2015-05-06 | 海能达通信股份有限公司 | Data transmission method and device for private network communication |
| CN103813273B (en) * | 2013-12-23 | 2017-04-12 | 杭州承联通信技术有限公司 | PDT (programmable data terminal) digital trunked base station wireless link channel frequency allocation and access method |
| CN103945454B (en) * | 2014-01-21 | 2017-04-26 | 杭州承联通信技术有限公司 | Method for reducing channel number bit length in PDT digital trunking system |
| DE112015006680T5 (en) * | 2015-07-10 | 2018-03-29 | Motorola Solutions, Inc. | Method and device for fast channel use at an event location |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1549484A (en) * | 2003-05-22 | 2004-11-24 | 华为技术有限公司 | Method for supporting concentration service multi-channel by CDMA system |
| CN1602103A (en) * | 2003-09-22 | 2005-03-30 | 华为技术有限公司 | Method of carrying out fast calling setup |
| CN1747592A (en) * | 2004-09-08 | 2006-03-15 | 华为技术有限公司 | Configuration of special channel with multiple carrier frequency |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1549484A (en) * | 2003-05-22 | 2004-11-24 | 华为技术有限公司 | Method for supporting concentration service multi-channel by CDMA system |
| CN1602103A (en) * | 2003-09-22 | 2005-03-30 | 华为技术有限公司 | Method of carrying out fast calling setup |
| CN1747592A (en) * | 2004-09-08 | 2006-03-15 | 华为技术有限公司 | Configuration of special channel with multiple carrier frequency |
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