CN100407816C - Calling method of group call - Google Patents
Calling method of group call Download PDFInfo
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- CN100407816C CN100407816C CN2005100829523A CN200510082952A CN100407816C CN 100407816 C CN100407816 C CN 100407816C CN 2005100829523 A CN2005100829523 A CN 2005100829523A CN 200510082952 A CN200510082952 A CN 200510082952A CN 100407816 C CN100407816 C CN 100407816C
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Abstract
The present invention discloses a paging method of group calls, which comprises the steps: A. when users request the group calls, a PTT server sends paging request messages to a base station controller, wherein the request messages carry the group numbers of requested groups and the information of mobile terminals of the groups; B. the base station controller sends group call messages, paging frequency points of the monitoring of the mobile terminals of the groups and the information of paging time slots to a base station, wherein the group call messages carry the group numbers; C. the base station forwards the group call messages in the paging time slots on the paging frequency points; D. the mobile terminals match the group information of the mobile terminals according to the group numbers in the group call messages for accepting calls and establishing connection. The method of the present invention is used for quickly calling the group users and greatly reducing the amount of paging messages which need to be sent, and thus, system resources are saved, and system capacity is raised.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of paging method when asking group calling in the group service.
Background technology
Based on the cdma2000 protocol edition 6, most message on the paging channel all are point-to-point transmissions, base station controller (BSC) is inserted the address information of portable terminal in layer 2 link access control (LAC) layer, send to then and eat dishes without rice or wine, portable terminal solves the address information among the LAC, judge whether it is to send to oneself, then handle if send to the message of oneself.GPM (General Page Message, general page messages) message can point-to-multipoint, but in fact just shared the paging public field (GPM Common Fields) of 3 bytes, each terminal called each has a paging acknowledgment (Page Record), can think that the GPM of point-to-multipoint still forms (referring to aerial mouthful of agreement IS2000-4) by many beep-page messages.
(Push To Talk PTT), can provide the half-duplex voice of point-to-multipoint to call out to emerging group service.Cluster group calling is set up in the process, a plurality of called foundation simultaneously, and require all to insert in the short time.According to the cdma agreement, paging channel speed has only 9600bps, and the cluster multi call user can be up to a hundred individual, and very likely be in same paging domain, when the same time of all beep-page messages arrives base station (BTS) request transmission, paging channel occurs congested, message is waited in line to be sent, add other expense such as message that on paging channel, send in general messages, the call setup flow process, suppose to calculate by 100 users, need time all beep-page messages transmissions could be finished, obviously do not satisfy the characteristics of group service " PoC " above 6 seconds.
Though can alleviate the pressure that beep-page message sends by disposing many paging channel, need take valuable forward direction Walsh sign indicating number resource, reduce power system capacity.
Summary of the invention
The invention provides a kind of paging method of group call, the problem that can not guarantee in the very short time that requires, to call out the collective group user when solving the group call that exists in the prior art.
The inventive method comprises:
A, when the user asks group call, the PTT service device sends paging request message to base station controller, carries the information of mobile terminal of group's group number of being requested group and this group in this message;
B, base station controller carry the group calling message of described group's group number and paging frequency and the paging time-slot information that this group's portable terminal is monitored to the base station transmission;
Transmit described group calling message in C, the paging time-slot of base station on described paging frequency;
D, portable terminal connect according to the group information call accepted of the coupling of the group's group number in the group calling message self.
Described information of mobile terminal is the international mobile subscriber identification code IMSI of portable terminal; Among the described step B, base station controller is determined paging frequency and the paging time-slot that corresponding portable terminal is monitored according to IMSI.
According to said method of the present invention, base station controller adopts hash algorithm to calculate paging frequency and paging time-slot that corresponding portable terminal is monitored according to international mobile subscriber identification code IMSI.
According to said method of the present invention, in the described steps A, the PTT service device sends a paging request message respectively according to being requested different paging domains mobile terminal affiliated in the group.
Described paging request message comprises: the international mobile subscriber identification code IMSI and the slot cycle index information of each the portable terminal correspondence in group's group number, paging domain, this group in this paging domain.
Comprise also among the described step B that base station controller relatively monitors the pairing slot cycle index of portable terminal of same paging time-slot on the same paging frequency, maximum slot cycle index is handed down to the base station; Among the described step C, when group calling message is transmitted in the base station, if paging time-slot is occupied, then calculate corresponding next paging time-slot, and in this next one paging time-slot, send described group calling message according to described maximum slot cycle index.
Described slot cycle index information is given described PTT service device by mobile terminal reporting.
The group information of described portable terminal is issued by the PTT service device or upgrades.
After the PTT service device was made amendment to the group information of portable terminal, stabbed memory time, and the group information after portable terminal issues this timestamp and upgrades.
When the mobile terminal request cluster position is upgraded, report the last time to carry out the timestamp of group information updating; If the PTT service device judge the timestamp that reports with memory time stamp inequality, then carry out the group information updating of portable terminal.
Beneficial effect of the present invention is as follows:
(1) the present invention uses group group number to carry out group paging, for a group call, only needs to send several paging request message and gets final product, and call setup speed is fast, can satisfy the requirement of group service " PoC ";
(2) BSC sends a group calling message and can call out a plurality of portable terminals of monitoring same paging time-slot on the same paging frequency simultaneously in the inventive method, therefore, greatly alleviate the pressure of paging channel transmission beep-page message, saved system resource, the corresponding power system capacity that improved.
Description of drawings
Fig. 1 is the group call system architecture diagram;
Fig. 2 is the inventive method flow chart;
Fig. 3 monitors frequency and paging time-slot schematic diagram for portable terminal;
Fig. 4 is one of mobile terminal to update group information flow chart;
Fig. 5 is two of a mobile terminal to update group information flow chart;
Fig. 6 is three of a mobile terminal to update group information flow chart.
Embodiment
Referring to Fig. 1, be the system architecture diagram that group call relates to, comprise base station (BTS), base station controller (BSC) and PTT (PTT) server.The Um mouth is the air interface between portable terminal and the base station, and Abis is the interface of BTS and BSC, and Act is the CDMA trunking signal interface between Packet Control Function in the base station controller (PCF) and ptt server.
When portable terminal was initiated group call, the inventive method was by flow performing shown in Figure 2.Below in conjunction with accompanying drawing, the concrete implementation step of the inventive method is described in detail.
Step S11, mobile subscriber initiate group call by the base station to ptt server.
Mobile subscriber herein can be a user in the called group, also can be user or user who does not add any group of another group, as long as this user has the right to initiate group call.
After step S12, ptt server are received a group call, send paging request message, in this message, carry the group group number that is requested group and the information of mobile terminal of this group to base station controller.
In this step, information of mobile terminal can be the international mobile subscriber identification code (IMSI) of all portable terminals in this called group, also can be the identification information of a portable terminal of other unique identification.When sending paging request message, the PTT service device sends a paging request message respectively according to being requested different paging domains mobile terminal affiliated in the group; Promptly be requested all portable terminals in the group if belong to same paging domain, then only need send a paging request message; If all portable terminals that are requested in the group belong to two, three or more different paging domains, then ptt server needs corresponding send two, three or more paging request message.
In the paging request message that sends, need to comprise the IMSI (as example) and each portable terminal time slot corresponding periodic key (the Slot Cycle Index) information that belong to all portable terminals in this zone in paging group group number, paging domain information, this group at least.Because ptt server has the function of the customer location management that is similar to mobile switching centre (MSC),, use this zone to carry out paging during paging by the position area information at the current place of new technological process maintenance customer more; The slot cycle index information of portable terminal reports to ptt server by portable terminal when the position is upgraded.
Step S13, base station controller carry the group calling message of above-mentioned group's group number and paging frequency and the paging time-slot information that this group's portable terminal is monitored to the base station transmission.
Specifically comprise: after BSC receives the paging request message of ptt server transmission, assembling and transmission PTT group calling message (Group Page Message) among the message layer 2LAC, only comprise automatic-answering back device sublayer (ARQ) information, do not comprise sublayer, address information, comprise called group's group number in the layer 3.For example, this PTT group calling message format is:
| Message field | Length (bits) | Explanation |
| Message Length | 8 | Message-length |
| Message Type Fields | 8 | The group paging type of message |
| ARQ Fields | 8 | LAC automatic-answering back device sublayer information |
| SDU(Layer 3) | Random length | Layer three message comprise called group's group number |
Because different portable terminals is monitored different frequencies, so BSC need inform paging frequency and corresponding paging time-slot that each portable terminal of the called group member of BTS is monitored.For example: the IMSI of the group member that BSC sends according to ptt server, notify BTS after using hash algorithm to calculate paging frequency that each portable terminal monitors and paging time-slot.
As shown in Figure 3, BSC is according to the IMSI of a plurality of portable terminals, calculates to send PTT group calling message, n the portable terminals of No. 2 paging time-slot pagings (MS1 is to MSn) of its intermediate-frequeney point 2 in the 2nd, No. 3 time slot of the 0th, No. 3 time slot of frequency 1 and frequency 2.Because monitoring the pairing slot cycle index of a plurality of portable terminals of same paging time-slot on the same paging frequency might be different, so BSC also issues maximum in the pairing slot cycle index of a plurality of portable terminals of monitoring same paging time-slot on the same paging frequency to BTS.
Transmit described group calling message in step S14, the BTS paging time-slot on all paging frequencies that BSC issues.
For example, BTS sends PTT group calling message in the 2nd, No. 3 time slot of the 0th, No. 3 time slot of frequency 1 shown in Figure 3 and frequency 2.If No. 2 paging time-slot of frequency 2 is occupied, can't send this beep-page message, then need send at next paging cycle, because this paging time-slot is the paging at n portable terminal, and the slot cycle index of each portable terminal might be different, therefore, for can be, should get maximum Imax in the pairing slot cycle index of this n portable terminal as slot cycle index value by the paging of a group calling message to this n portable terminal.In this case, BTS adopts the maximum in the slot cycle index that BSC issues to determine that the next paging time-slot that sends group calling message is 16 * 2
ImaxAfter the individual time slot; Suppose that maximum slot cycle index is 1, then next paging time-slot is 2+16 * 2
1=No. 34 time slots.Like this, use a group calling message, can this n of paging monitor the portable terminal of No. 2 time slot of frequency 2, improved the efficient of paging greatly.
The hash algorithm of above mentioning has specific descriptions in cdma2000 air protocol IS2000-5, be omitted at this.
Step S15, portable terminal connect according to the group information call accepted of the coupling of the group's group number in the group calling message self.
In this step, portable terminal is if the group's group number that listens in this group calling message is identical with the group that self adds, and then response is called out; Otherwise, this group calling is not inserted response.
In the methods of the invention, owing to adopt group's group number call group user, so group's portable terminal should keep the synchronous renewal of group information with ptt server, could guarantee that group user in time, accurately replys group call.Concrete portable terminal group information updating method comprises following manner.
Mode one: when carrying out the cluster position renewal behind the mobile terminal-opening or by the time cycle of setting, upgrade group information.
Referring to Fig. 4, portable terminal is carrying out need carrying when cluster position is upgraded the timestamp that the last time carries out group information updating.This timestamp is safeguarded that by ptt server ptt server was notified portable terminal after portable terminal was finished group information updating, by portable terminal this timestamp was preserved.If ptt server is revised the then corresponding change of the timestamp of ptt server side to this group information later on; When portable terminal carries out the cluster position renewal, the current time of timestamp that ptt server will carry up and ptt server side stabs and compares, if it is different, show that ptt server revises the group information of portable terminal, and mobile terminal side upgrades not also in time, therefore, ptt server sends the group updating indication to portable terminal, after portable terminal is received, initiate the group information updating request, the group information that ptt server issues after the renewal is given portable terminal.
Mode two: initiate group information updating by ptt server.
Referring to Fig. 5, if the keeper changes the group information of ptt server, as increasing or having deleted group member, then can send the group updating indication to the portable terminal that is increased or deletes in real time by ptt server, after portable terminal is received, initiate the group information updating request, the group information that ptt server issues after the renewal is given portable terminal.
Send in the group updating indication process at ptt server,, then do not do any processing, pass through above-mentioned registering flow path flip flop group group information updating behind the mobile terminal activating if portable terminal is in deactivation status;
When if this portable terminal is in state of activation for newly-increased member, if do not receive the group updating indication, then ptt server need send the group updating indication periodically, till this portable terminal is received;
When if this portable terminal is in state of activation for group's removing members, if do not receive the group updating indication, ptt server can no longer continue to handle.
Mode three: the refuse information flip flop group group information updating that returns by ptt server.
Referring to Fig. 6, ptt server is initiated group paging, if portable terminal is deleted but owing in time do not carry out group information updating in group, to take for oneself also be group member and when responding to this portable terminal when this group paging, then ptt server can be refused this user's call setup, and the Reason For Denial value does not belong to this group for the user, after mobile phone is received this refuse information, initiate the cluster position update request, the group information that ptt server issues after the renewal is given portable terminal.
By above-mentioned several group information updating flow processs, portable terminal can be preserved correct group information in real time, when ptt server adopts group's group number to carry out group paging, carries out quick, correct page response.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. the paging method of a group call is characterized in that, comprising:
A, when the user asks group call, the PTT service device sends paging request message to base station controller, carries the information of mobile terminal of group's group number of being requested group and this group in this message;
B, base station controller carry the group calling message of described group's group number and paging frequency and the paging time-slot information that this group's portable terminal is monitored to the base station transmission;
Transmit described group calling message in C, the paging time-slot of base station on described paging frequency;
D, portable terminal connect according to the group information call accepted of the coupling of the group's group number in the group calling message self.
2. the method for claim 1 is characterized in that, described information of mobile terminal is the international mobile subscriber identification code IMSI of portable terminal; Among the described step B, base station controller is determined paging frequency and the paging time-slot that corresponding portable terminal is monitored according to IMSI.
3. method as claimed in claim 2 is characterized in that, base station controller adopts hash algorithm to calculate paging frequency and paging time-slot that corresponding portable terminal is monitored according to international mobile subscriber identification code IMSI.
4. the method for claim 1 is characterized in that, in the described steps A, the PTT service device sends a paging request message respectively according to being requested different paging domains mobile terminal affiliated in the group.
5. method as claimed in claim 4 is characterized in that, described paging request message comprises: the international mobile subscriber identification code IMSI and the slot cycle index information of each the portable terminal correspondence in group's group number, paging domain, this group in this paging domain.
6. method as claimed in claim 5 is characterized in that, comprises also among the described step B that base station controller relatively monitors the pairing slot cycle index of portable terminal of same paging time-slot on the same paging frequency, and maximum slot cycle index is handed down to the base station; Among the described step C, when group calling message is transmitted in the base station, if paging time-slot is occupied, then calculate corresponding next paging time-slot, and in this next one paging time-slot, send described group calling message according to described maximum slot cycle index.
7. method as claimed in claim 5 is characterized in that, described slot cycle index information is given described PTT service device by mobile terminal reporting.
8. the method for claim 1 is characterized in that, the group information of described portable terminal is issued by the PTT service device or upgrades.
9. method as claimed in claim 8 is characterized in that, after the PTT service device was made amendment to the group information of portable terminal, stabbed memory time, and the group information after portable terminal issues this timestamp and upgrades.
10. method as claimed in claim 9 is characterized in that, when the mobile terminal request cluster position is upgraded, reports the last time to carry out the timestamp of group information updating; If the PTT service device judge the timestamp that reports with memory time stamp inequality, then carry out the group information updating of portable terminal.
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| CN2005100829523A CN100407816C (en) | 2005-07-07 | 2005-07-07 | Calling method of group call |
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| CN2005100829523A CN100407816C (en) | 2005-07-07 | 2005-07-07 | Calling method of group call |
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| CN1848979A CN1848979A (en) | 2006-10-18 |
| CN100407816C true CN100407816C (en) | 2008-07-30 |
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| CN2005100829523A Expired - Fee Related CN100407816C (en) | 2005-07-07 | 2005-07-07 | Calling method of group call |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102118827A (en) * | 2009-12-31 | 2011-07-06 | 中兴通讯股份有限公司 | Preprocessing method for base station access, terminal and base station |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101466075B (en) * | 2007-12-17 | 2010-12-08 | 中兴通讯股份有限公司 | Matching method for group paging of CDMA cluster system |
| WO2009082860A1 (en) * | 2008-01-02 | 2009-07-09 | Zte Corporation | Cell type informing method and system based on lte system |
| CN101594681B (en) * | 2008-05-27 | 2012-11-28 | 中兴通讯股份有限公司 | Method for realizing self-optimization of LTE system |
| CN101686461A (en) * | 2008-09-23 | 2010-03-31 | 华为技术有限公司 | Method, system and network element of access control |
| CN101931859B (en) * | 2009-06-23 | 2013-04-17 | 华为技术有限公司 | Mobile communication paging method, system and device |
| CN102158959B (en) * | 2010-02-11 | 2014-12-17 | 电信科学技术研究院 | Paging method and device |
| CN103796175B (en) | 2012-10-31 | 2019-09-24 | 中兴通讯股份有限公司 | The method and related device of clustered paging are sent, received in a kind of LTE system |
| WO2017157009A1 (en) * | 2016-03-15 | 2017-09-21 | 中兴通讯股份有限公司 | Cluster network-wide call control method and device |
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