A kind of in group system the implementation method of flexible adjustment of talk time limit
(1) technical field
The present invention relates to the mobile communication technology field, be specifically related to a kind of conversation technology in limited time of in group system, adjusting.
(2) background technology
Trunked mobile communication system is the important component part of professional mobile communication, and different with public correspondence is that the channel resource outfit is limited, but the instantaneity that the user sets up system calling is had relatively high expectations.In the public correspondence net, because charge system is arranged, the user's communication time, long more charge was high more, and the number of channel that public network is built is very huge, is difficult to the situation that channel is all taken occur, so generally do not use conversation timer timing function.But represent the trunked communication system of specialized communication then different, channel is equipped with and can't compares with the public correspondence net usually, if do not adopt the conversation timer in limited time, the situation that channel is all taken will occur, and can't satisfy the requirement that instantaneity is set up in communication.
In the present cluster standard, few in order to solve channel resource, the demanding contradiction of instantaneity is set up in communication, need carry out timer in limited time to each conversation.Definition and the transfer mode of having stipulated the conversation timer parameter in some cluster standards have been arranged at present, are example with the DMR standard, and the definition of conversation timer parameter is as shown in table 1 in the DMR standard:
In the DMR standard, converse timer parameter definition of table 1
This parameter is transmitted in broadcasting Announcements (announcement) signaling, carries out timing according to this parameter in MS (portable terminal) communication process, and gives promptings such as screen display or other sound, light, vibrations; This timer will be safeguarded in the base station, in case overtime, can remove this Traffic Channel by force.
The prescribe a time limit drawback of method of the conversation timer that uses in the above-mentioned DMR standard is the information of address part not in the announcement signaling, so in a period of time, all portable terminals all can receive with a kind of timer parameter, can not use different timers according to actual conditions, can't adjust timer parameter flexibly according to the rank (or importance) of certain calling.For example, if it is too small that the conversation timer parameter that systematic unity is set is set, after an important call setup got up, the possibility in limited time of the conversation timer parameter defined of current use was not enough, the situation that just may occur conversing and also not have end just to be taken out stitches by force; Otherwise if conversation timer parameter definition is excessive, unessential calling will be too much takies Traffic Channel, reduces the utilance of whole system channel.
(3) summary of the invention
The object of the present invention is to provide and a kind ofly can overcome the shortcoming that timer parameter can't be set flexibly according to the rank of calling out in the existing DMR standard, the compatibility of DMR standard can be guaranteed simultaneously, the conversation implementation method of flexible adjustment of talk time limit in group system in limited time can be conveniently adjusted again.
The object of the present invention is achieved like this: group system comprises base station and portable terminal, the base station is transmission timer parameter announcement signaling at one's leisure, in conjunction with the subnet mask parameter, meet the portable terminal of announcing the address and will refresh and preserve the conversation timer parameter automatically, in mobile terminal calling process, according to the address lookup timer parameter of conversing accordingly, in communication process, carry out timing, and point out; When portable terminal makes a call, the base station sends the distribution service channel signaling on control channel, start timer simultaneously; Portable terminal picks up counting receiving after the distribution service channel signaling forwards Traffic Channel to, the prompting remaining air time of user; Remove the Traffic Channel signaling in case timer expiry, base station send on Traffic Channel, finish this calling.
The present invention also has some technical characterictics like this:
1, described base station transmission timer parameter announcement signaling at one's leisure, portable terminal judges according to address and zygote network parameters whether this announcement signaling is effective, if effective, upgrades and the timer parameter of this machine of preservation;
2, whether effective method is described judgement announcement signaling: portable terminal of subnet mask parameter indication utilizes the indicated figure place of subnet mask to compare to the low bit of own address and the low bit of the address from PDU, whether effective to determine this frame information, adopt this method, portable terminal colony can be divided into 2 effectively
MaskIndividual subnet: if Mask=0 does not so just have address bit to compare, so just there is not subnet; If Mask=1 has only address lowest order in mobile terminal address lowest order and this frame information to be complementary so and just accepts this frame information; This process can be deduced Mask=24 always, and this situation illustrates that this frame information only is applicable to a portable terminal.
3, the compatible DMR cluster of described broadcasting announcement signaling standard, content-defined in the broadcasting announcement signaling in the DMR cluster standard:
The present invention is directed to the shortcoming that timer parameter can't be set flexibly according to the rank of calling out in the existing DMR standard, the address information in the system is attached in the broadcasting announcement signaling, distribute different timer parameters according to different address packets.And, kept the defined signaling format of standard in order to guarantee the compatibility of DMR standard, utilize standard reserved information position regulation timer parameter encapsulation format and transfer mode.
Technical characterstic of the present invention has:
1, utilize the address to realize the method for similar call address different grouping use different timing device parameter in conjunction with subnet mask;
2, utilize the conversation timer parameter announcement signaling encapsulation format of DMR reference format redetermination.
Purpose of the present invention can also be transmitted this conversation timer information by the channel associated signalling of utilizing Traffic Channel and realize, but this scheme can be because present DMR reference format can't support that the redetermination form can influence compatibility.
(4) description of drawings
Fig. 1 is an embodiment timer parameter conveying flow schematic diagram;
Fig. 2 calls out realization flow schematic diagram in limited time for embodiment.
(5) embodiment
The present invention is further illustrated below in conjunction with the drawings and specific embodiments:
I. signaling format definition
Content-defined as shown in table 2 in the broadcasting announcement signaling in the DMR cluster standard:
Content-defined in the broadcasting announcement signaling in the table 2 DMR cluster standard
It is as shown in table 3 wherein to announce type definition:
Table 3 announcement type definition
Binary Zero 0111 to 11101 is a reserved place as can be seen, therefore can utilize 00111 as the conversation timer ID.Next define broadcast parameter, as shown in table 4:
The definition of table 4 broadcast parameter
Limit_Length can define 512 (2 for the conversation timer parameter
9) plant conversation length in limited time, 0 is no time limit agreement, and promptly portable terminal adopts the parameter of acquiescence, and 1~510 numeric value represented can be by default, and 511 is the timing parameters endless, does not promptly have the timer constraint.
Mask is the subnet mask parameter.For convenience classified in the address of portable terminal, adopted the subnet mask dividing mode.Whether portable terminal of subnet mask parameter indication utilizes the indicated figure place of subnet mask to compare to the low bit of own address and the low bit of the address from PDU, effective to determine this frame information.Adopt this method, portable terminal colony can be divided into 2 effectively
MaskIndividual subnet: if Mask=0 does not so just have address bit to compare, so just there is not subnet; If Mask=1 has only address lowest order in mobile terminal address lowest order and the wooden frame information to be complementary so and just accepts this frame information; This process can be deduced Mask=24 always, and this situation illustrates that this frame information only is applicable to a portable terminal.
II. function realization flow
The base station can send this announcement signaling at one's leisure, meets the announcement address and will refresh and preserve the timer parameter of conversing automatically in conjunction with the terminal of subnet mask parameter condition.In mobile terminal calling process, according to the address lookup timer parameter of conversing accordingly, in communication process, carry out timing, and give promptings such as screen display or other sound, light, vibrations.
The timer parameter conveying flow as shown in Figure 1.
The base station is transmission timer parameter announcement signaling at one's leisure, and portable terminal judges according to address zygote network parameters whether this announcement is effective, if effectively, upgrades and preserve the timer parameter of wooden machine.
Call out and prescribe a time limit realization flow as shown in Figure 2.
Portable terminal makes a call, and the base station sends the distribution service channel signaling on control channel, start timer simultaneously; Portable terminal picks up counting receiving after the distribution service channel signaling forwards Traffic Channel to, the prompting remaining air time of user; Remove the Traffic Channel signaling in case timer expiry, base station send on Traffic Channel, finish this calling.
Abbreviation that the present invention relates to and Key Term definition: Mask---subnet mask; MS---Mobile Station---travelling carriage; PDU---Protocol Data Unit---protocol Data Unit; DMR---Digital Mobile Radio---digital mobile radio.