CN1545352A - Implement method of long code mask for sharing channel - Google Patents
Implement method of long code mask for sharing channel Download PDFInfo
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- CN1545352A CN1545352A CNA2003101122188A CN200310112218A CN1545352A CN 1545352 A CN1545352 A CN 1545352A CN A2003101122188 A CNA2003101122188 A CN A2003101122188A CN 200310112218 A CN200310112218 A CN 200310112218A CN 1545352 A CN1545352 A CN 1545352A
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Abstract
The invention advances a long code mask implementing method used in sharing channels, including: 1, mobile terminal or network side initiates a clustered group calling, and the system enters a clustered service flow; 2, cluster planning sever generates a specific long code mask according to group number and region sequence number of the group calling; 3, before the chip allocates forward service channels, base station writes the long code mask in the chip to interfere with the forward service channels; the long code masks corresponding to the forward service channels of the same group are the same; 4, base station informs the mobile station of the long code mask by a channel allocation information or an channel allocation extension information. It implements a support for sharing of clustered forward service channels.
Description
Technical field
The present invention relates to CDMA mobile communication system, relating in particular to the CDMA standard group communication is the Long Code Mask implementation method of shared channel.
Background technology
Trunked communication system is meant one group of wireless channel of multiple users share, and dynamically use the dedicated mobile communications subsystem of these channels, it is a kind of commander, dispatching patcher, in some social economies, the relatively advanced country of industrial or agricultural, there is application very widely in this system in the departments such as enterprise, cause, industrial and mineral, oil field, farm, public security, police and army that commander, scheduling feature are had relatively high expectations.The honeycomb trunked communication system combines cellular communication system and specific schedule communication system, has both expanded the scope of business of cellular communication system, makes trunked communication system break away from the specific-dispatching communication system in function and regional limitation again.Present honeycomb trunked communication system can be divided into TDMA (Time Division MultiplexAccess time division multiple access) and two kinds of standards of CDMA (Code Division Multiplex Access code division multiple access) according to access way.In the third generation communication technology ripe day by day today, the TDMA standard exists and can not can't satisfy growing communication requirement to third generation communication system smooth evolution, defective such as capacity is limited and data throughout is low.And cdma system has the wide-band spread spectrum air interface, can satisfy the demand of third generation wireless communication system, and traditional voice service not only is provided, and Packet data service at a high speed can be provided.The cdma cellular communication system is combined with digital cluster system, both can improve group system number of users in the single sector, can on the basis of high-speed packet data service, develop the new business that more has the group system characteristics again.
The trunked communication system main feature of CDMA standard is to adopt half-duplex communication mode, can realize continuing fast, and support group call (being the method for calling of one-to-many).In trunked communication system, require user's shared forward channel in same sub-district in the group, when group user is called out or is talked, as long as pin PTT (Push To Talk, push-to-talk) key just can be conversed with other users in the group, and this PTT business is widely used in intercom system and group system, be public security, fire-fighting, communications and transportation, airport aviation, construction site, big assembly, groups such as military scheduling use provides the command scheduling function.Along with the progress of society, the enhancing of flow of personnel, the fast development of simultaneous mobile communication technology, the field of personal communication is more and more wider, group service also turns to the individual to use gradually, between for example young fashion personage or the chat in the groupuscule, the communication between the household internal member etc.Demand is brought the innovation of technology, uses the development that brings product, along with extensively carrying out of mobile communication value-added service, has the trunked communication system of the CDMA standard of colony's calling, message sending function, has become a kind of new mobile value-added application day by day.
The CDMA standard group communication system is that the CDMA standard cluster group system user data that forward direction sends in a group is identical with an important difference of common CDMA Cellular System.Its key character is " getting ready to go into action in hundreds ", if simple superposition group system on the basis of traditional C DMA cellular communication system, just distribute a fully independently forward traffic channel, will the capacity and the stability of system be produced a very large impact to each user in the group.And effective solution is exactly the user's forward compensatory channel sharing to same sector same group, that is to say, same sector same group service-data oriented is not to issue different user by forward traffic channel independently, but by distributing identical Walsh sign indicating number, identical frame biasing makes the forward complement channel of same sector same group send identical content with identical form simultaneously with identical Long Code Mask, thereby reach the reduction forward emitting power, improve the purpose of forward-link capacity, still do not have effective Long Code Mask implementation method at present and solve this problem.
Summary of the invention
The technical problem to be solved in the present invention is to provide the realization that forward traffic channel is shared in a kind of suitable Long Code Mask implementation support in the cdma cellular group system.
For achieving the above object, the present invention proposes a kind of Long Code Mask implementation method that is used for shared channel, it is characterized in that, may further comprise the steps:
The first step: portable terminal or network side are initiated cluster group calling, and system enters the Processing Cluster operation flow;
Second step: trunking dispatch server generates a specific Long Code Mask according to the group's group number and the regional sequence number of group call;
The 3rd step: when forward traffic channel is distributed at chip in the base station, Long Code Mask is write chip, be used for the forward traffic channel scrambling; At this moment, the Long Code Mask of the forward traffic channel correspondence of same group is identical.
The 4th step: the base station is by channel assignment message or Extended Channel Assignment Message notice travelling carriage, the employed Long Code Mask of this base station forward traffic channel.
The method of the invention is by the new Long Code Mask structure of structure, and its implementation, realized supporting the purpose of sharing of cluster forward traffic channel, overcome prior art and can't construct suitable Long Code Mask and can not realize supporting the shortcoming that the cluster forward traffic channel is shared.
Description of drawings
Fig. 1 is the Long Code Mask implementation method flow chart that is used for shared channel of the present invention.
Embodiment
To CDMA cluster cellular communication system, in order to support Channel Sharing, need the user of same group to have identical Long Code Mask, and in order to distinguish the user between the group, the different Long Code Masks of different group allocation.Long code is scrambling in the effect of forward link, and the content of intrasystem long code all is identical, and scrambling reaches by giving identical long code out of phase.And the XOR of the mask of different content and long code corresponding bits position can obtain the long code of out of phase.
To common cdma cellular communication system, different mask contents is to obtain by the unique Electronic Serial Number of travelling carriage.And, wish that then the user of same group has identical mask content to CDMA cluster cellular communication system, therefore, the long code of the forward shared channel of CDMA cluster cellular communication system should obtain according to group information rather than Electronic Serial Number.
The Long Code Mask of being made up of group information will comprise the particular value that 10 bits are long, the regional sequence number that 16 bits are long, group's sequence number that 16 bits are long.And the Long Code Mask of conventional system is made up of the particular value of 10 bits length and the Electronic Serial Number of 32 bit long.
Fig. 1 shows the flow chart that group system realizes Long Code Mask.
1) portable terminal or network side are initiated cluster group calling, and system enters the Processing Cluster operation flow.
2) trunking dispatch server generates a specific Long Code Mask according to the group's group number and the regional sequence number of group call.
3) base station writes chip with Long Code Mask when chip distributes forward traffic channel, is used for the forward traffic channel scrambling.At this moment, the Long Code Mask of the forward traffic channel correspondence of same group is identical.
4) travelling carriage is told by channel assignment message or Extended Channel Assignment Message in the base station, the Long Code Mask that the base station forward traffic channel uses.
Claims (5)
1, a kind of Long Code Mask implementation method that is used for shared channel is characterized in that, may further comprise the steps:
The first step: portable terminal or network side are initiated cluster group calling, and system enters the Processing Cluster operation flow;
Second step: trunking dispatch server generates a specific Long Code Mask;
The 3rd step: when forward traffic channel is distributed at chip in the base station, Long Code Mask is write chip, be used for the forward traffic channel scrambling, the Long Code Mask that the forward traffic channel of same group is corresponding identical;
The 4th step: the base station is by channel assignment message or Extended Channel Assignment Message notice travelling carriage, the employed Long Code Mask of this base station forward traffic channel.
2, the Long Code Mask implementation method that is used for shared channel according to claim 1 is characterized in that, the foundation of long code generation mask is the group's group number and the regional sequence number of group call in described second step, and the basis that generates long code is a group information.
3, the Long Code Mask implementation method that is used for shared channel according to claim 1 is characterized in that, in described the 3rd step, and the different Long Code Masks of different group allocation.
4, the Long Code Mask implementation method that is used for shared channel according to claim 1 is characterized in that, the XOR of the mask of different content and long code corresponding bits position obtains the long code of out of phase.
According to the described Long Code Mask implementation method that is used for shared channel of claim 1 to 4, it is characterized in that 5, described Long Code Mask will comprise the particular value that 10 bits are long, the regional sequence number that 16 bits are long, group's sequence number that 16 bits are long.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310112218 CN1263325C (en) | 2003-11-14 | 2003-11-14 | Implement method of long code mask for sharing channel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310112218 CN1263325C (en) | 2003-11-14 | 2003-11-14 | Implement method of long code mask for sharing channel |
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| Publication Number | Publication Date |
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| CN1545352A true CN1545352A (en) | 2004-11-10 |
| CN1263325C CN1263325C (en) | 2006-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200310112218 Expired - Fee Related CN1263325C (en) | 2003-11-14 | 2003-11-14 | Implement method of long code mask for sharing channel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100372401C (en) * | 2004-12-24 | 2008-02-27 | 华为技术有限公司 | Method of group communication based on asymmetric channel |
| CN113838058A (en) * | 2021-10-11 | 2021-12-24 | 重庆邮电大学 | Automatic medical image labeling method and system based on small sample segmentation |
-
2003
- 2003-11-14 CN CN 200310112218 patent/CN1263325C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100372401C (en) * | 2004-12-24 | 2008-02-27 | 华为技术有限公司 | Method of group communication based on asymmetric channel |
| CN113838058A (en) * | 2021-10-11 | 2021-12-24 | 重庆邮电大学 | Automatic medical image labeling method and system based on small sample segmentation |
| CN113838058B (en) * | 2021-10-11 | 2024-03-19 | 重庆邮电大学 | Automatic medical image labeling method and system based on small sample segmentation |
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| Publication number | Publication date |
|---|---|
| CN1263325C (en) | 2006-07-05 |
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Granted publication date: 20060705 Termination date: 20171114 |