CN101986725A - Realizing method and system for cell group with same pseudorandom noise (PN) based on code division multiple access (CDMA) cluster system - Google Patents
Realizing method and system for cell group with same pseudorandom noise (PN) based on code division multiple access (CDMA) cluster system Download PDFInfo
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Abstract
The invention discloses a realizing method for a cell group with same pseudorandom noise (PN) based on a code division multiple access (CDMA) cluster system. In the realizing method, a terminal initiates cluster calling under cells with the same PN; a base station system judges whether sectors related to all the users corresponding to the cluster calling intensively are centralized in the same PN cell, and the base station system constructs channel resource for the cell group with the same PN, then the base station keeps the cluster calling; and the base station system judges whether the sectors related to all the users corresponding to the cluster calling intensively are centralized in the same PN cell, and the base station system does not construct channel resource for the cell with the same PN, and then the base station system constructs channel resource for the cell group of the same PN and keeps the cluster calling. The invention also discloses a realizing system for the cell group with the same PN. Because the same PN cell technology is used for the CDMA, the system switching frequency of the CDMA cluster service is reduced and the call drop is avoided.
Description
Technical field
The present invention relates to the CDMA cluster system field, relate in particular to CDMA2000 (CodeDivision Multiple Access, CDMA cluster system) implementation method and the system of the same PN of 1x (Pseudorandom Noise, pseudo noise) area group.
Background technology
In CDMA2000 1x wireless cellular system, adjacent sub-district is distinguished by the PN short code of the different biasings of emission on Forward Pilot Channel.When terminal is passed through the coverage of different districts, can switch because of the variation of signal strength signal intensity, under the special application scenarios of part, when little and moving velocity of terminal is very fast as radius of society, the terminal of conversing may switch continually, and call drop takes place in switching under the increase of switching times, the especially high-speed case easily.See on the macroscopic statistics, the cutting off rate rising of base station, the stability of system are reduced.To this, speech business generally adopts neighbor cell to use the method for identical PN to avoid the generation of switching with data service, reduces whole system from macroscopic view and switches the frequency that takes place.
Be based on based on the group service of CDMA2000 1x that the normal speech business development of CDMA2000 1x expands, the characteristics of group service are point-to-multipoint communications, with the point-to-point communication of normal speech business essential difference is arranged, for example, it is huge that both set up the mode difference of physical channel, speech business is to set up physical channel by the user, sets up a forward fundamental channel (F-FCH) and a Reverse Fundamental Channel (R-FCH) for each user in audio call; The mode that group service is set up physical channel has multiple, have by the user and set up channel, as based on the enhancing group calling in the CDMA technology digital cluster system standard, organize interior user for each and set up 3 channels: F-FCH, a forward complement channel (F-SCH) and a R-FCH; Also have by setting up upright channel, as based on the conventional group calling in the CDMA technology digital cluster system standard, four channel F-FCH, Forward Broadcast Channel (F-BCH), R-FCH, reverse broadcast channel (R-BCH) are only set up in a group calling, and irrelevant with the interior number of users of group.In addition, except the difference of Traffic Channel, group service is the exclusive control channel of possible configuration also, as based on preceding reverse PoC (PTT) common channel in the CDMA technology digital cluster system standard.Because group service is set up aspect such as mode at physical channel and the normal speech business there are differences, so, the professional neighbor cell of existing normal speech uses the method for identical PN can't support the code division multiple access group service, under the scene such as promptly little and moving velocity of terminal is very fast at radius of society, the code division multiple access group service still exist system's switching frequency higher, problems such as call drop take place easily.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of implementation method and system of the same PN area group based on CDMA cluster system, neighbor cell in the CDMA cluster system uses identical PN, thereby can reduce system's switching frequency of code division multiple access group service, thereby avoid taking place call drop.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of implementation method of the same PN area group based on CDMA cluster system comprises:
Terminal is initiated trunked call under with the PN sub-district, base station system judges in the related set of sectors of all users of trunked call correspondence and exist with the PN sub-district, and base station system sets up channel resource for described with the PN cell set, and then base station system keeps trunked call; Base station system judges that existence is with the PN sub-district in the related set of sectors of all users of trunked call correspondence, and base station system is not set up channel resource with the PN cell set for described, and then base station system is describedly to set up channel resource and keep trunked call with the PN cell set.
Described terminal is initiated under with the PN sub-district also to comprise step before the trunked call: base station system is carried out with the configuration of PN cell set, describedly comprises at least with the configuration of PN cell set: each sub-district that comprises with the PN cell set, each main plot with the PN cell set.
When described terminal was initiated trunked call under with the PN sub-district, base station system sent physical channel and sets up message to the Channel Processing subsystem, and described physical channel is set up the related set of sectors of all users that message is carried the trunked call correspondence;
Described base station system for setting up channel resource with the PN cell set is:
The Channel Processing subsystem, is revised physical channel and is set up message with PN cell set configuration according to described, and amended physical channel is set up message sends to the chip drives unit;
Set of sectors in the message is set up according to physical channel in the chip drives unit, and modem module that will be corresponding with described set of sectors all sectors in described set of sectors enable.
Described Channel Processing subsystem is revised physical channel and is set up message and be: according to the configuration of PN cell set, join physical channel with sub-districts all in the PN cell set and set up in the entrained set of sectors of message described.
Described terminal is initiated under with the PN sub-district before the trunked call, also comprise step: when enabling the cluster Dedicated Control Channel with main plot in the PN cell set, base station system is according to the configuration of PN cell set, adds in the set of sectors that the sub-district joins described cluster Dedicated Control Channel as More Soft Handoff with all the other sub-districts in the PN cell set described.
This method also comprises step: when the user initiated cluster release, base station system sent tear down message to the Channel Processing subsystem;
The Channel Processing subsystem discharges all sub-districts that the related physical channel is served according to tear down message, carries out the modulation resource release flow then and removes the related physical channel.
A kind of realization system of the same PN area group based on CDMA cluster system, comprising: terminal request receiving element, Channel Processing subsystem, channel resource are set up unit, trunked call holding unit, wherein,
Described terminal request receiving element is used for the trunked call that receiving terminal is initiated, and the notification channel processing subsystem;
Described Channel Processing subsystem, be used for judging whether the related set of sectors of all users of trunked call correspondence exists the sub-district with PN, and whether set up channel resource for described with the PN cell set, exist in the related set of sectors of all users of trunked call correspondence with the PN sub-district, and set up channel resource for described with the PN cell set, then notify the trunked call holding unit; Exist with the PN sub-district in the related set of sectors of all users of trunked call correspondence, and set up channel resource for described with the PN cell set, then the notification channel resource is set up the unit;
Described channel resource is set up the unit, is used for the notice according to the Channel Processing subsystem, sets up the channel resource with the PN cell set, and notifies the trunked call holding unit after foundation is finished;
Described trunked call holding unit is used for keeping trunked call according to the notice of setting up the unit from Channel Processing subsystem or channel resource.
This system also comprises with PN cell set dispensing unit, is used to carry out dispose with the PN cell set.
Described channel resource is set up the unit and specifically comprised: chip drives unit and modem module provide the unit,
Described terminal request receiving element notification channel processing subsystem is: the terminal request receiving element sends the corresponding physical channel and sets up message to the Channel Processing subsystem;
Described Channel Processing subsystem, also be used for existing with the PN sub-district in the related set of sectors of all users of trunked call correspondence, and for described when setting up channel resource with the PN cell set, according to described same PN cell set configuration with PN cell set dispensing unit, revise physical channel and set up message, and amended physical channel is set up message send to the chip drives unit;
Described chip drives unit is used for providing modem module all sectors in described set of sectors corresponding with described set of sectors in the unit to enable modem module according to the set of sectors of setting up message from the physical channel of Channel Processing subsystem;
Described modem module provides the unit, is used to provide modem module.
Described terminal request receiving element also is used to receive the Client-initiated cluster and discharges request, and the notification channel processing subsystem;
Described Channel Processing subsystem also is used for the notice according to the terminal request receiving element, discharges all sub-districts that the related physical channel is served, and carries out the modulation resource release flow then and removes the related physical channel.
The present invention is based on the implementation method and the system of the same PN area group of CDMA cluster system, base station system carries out disposing with the PN cell set, when terminal is initiated trunked call under with the PN sub-district, exist in the related set of sectors of all users of trunked call correspondence with the PN sub-district, and set up channel resource for described with the PN cell set, then base station system keeps trunked call; Exist with the PN sub-district in the related set of sectors of all users of trunked call correspondence, and base station system do not set up channel resource for described with the PN cell set, then base station system is describedly to set up channel resource and keep trunked call with the PN cell set.The present invention will be applied to the code division multiple access group service with the PN cellular technology, thereby reduce system's switching frequency of code division multiple access group service, can avoid taking place call drop.
Description of drawings
Fig. 1 is the implementation method schematic flow sheet that the present invention is based on the same PN area group of CDMA cluster system;
Fig. 2 is the realization system configuration schematic diagram that the present invention is based on the same PN area group of CDMA cluster system.
Embodiment
Basic thought of the present invention is: base station system carries out disposing with the PN cell set, when terminal is initiated trunked call under with the PN sub-district, exist in the related set of sectors of all users of trunked call correspondence with the PN sub-district, and set up channel resource for described with the PN cell set, then base station system keeps trunked call; Exist with the PN sub-district in the related set of sectors of all users of trunked call correspondence, and base station system do not set up channel resource for described with the PN cell set, then base station system is describedly to set up channel resource and keep trunked call with the PN cell set.
Be described in further detail below in conjunction with the enforcement of accompanying drawing technical scheme.
Fig. 1 is the implementation method schematic flow sheet that the present invention is based on the same PN area group of CDMA cluster system, and as shown in Figure 1, the implementation method that the present invention is based on the same PN area group of CDMA cluster system generally comprises following steps:
Step 101: terminal is initiated trunked call under with the PN sub-district, and base station system sends the corresponding physical channel and sets up message to the Channel Processing subsystem.
Here, corresponding inhomogeneous physical channel, base station system sends different physical channels and sets up message to the Channel Processing subsystem, and physical channel is set up the related set of sectors of all users that message is carried the trunked call correspondence at least.
Before this step, also need to finish configuration to the PN cell set, except the configuration based on the basic same PN cell set of CDMA20001X agreement: joining is that each district pilots channel with the PN cell set sends identical PN signal; The synchronizing channel of each sub-district sends identical content simultaneously; The paging channel of each sub-district sends identical content simultaneously, the present invention also need to which sub-district corresponding one with the PN cell set, and be that main plot etc. is configured with which sub-district in the PN cell set, promptly comprise at least: the main plot of each sub-district that comprises with the PN cell set, each PN cell set with the configuration of PN cell set.These configurations generally are the system default configuration.
In addition, the cluster Dedicated Control Channel of main plot in enabling with the PN cell set, when being the base station system startup, base station system can be according to the configuration with the PN cell set, add in the set of sectors that the sub-district joins described cluster Dedicated Control Channel as More Soft Handoff with all the other sub-districts in the PN cell set described, thereby make described cluster Dedicated Control Channel provide service with all sub-districts in the PN cell set for described.
Step 102: the Channel Processing subsystem judges the physical channel receive sets up in the set of sectors that message carries whether have the sub-district with PN, if, execution in step 103; Otherwise, forward step 109 to.
The Channel Processing subsystem is concrete according to judging with the configuration of PN cell set.
Step 103: the Channel Processing subsystem judges whether to set up channel resource for described with the PN cell set, if forward step 106 to; Otherwise, forward step 104 to.
When under with the PN sub-district, setting up trunked call, filter channel and set up signaling, to setting up the same PN area group of channel, no longer the signaling of the channel foundation of the same type of group interior arbitrary sub-district is issued in response, be for fear of repeating to set up channel, avoiding the waste of resource, and the situation of many parts of identical datas copies may be received in the upper strata.
Step 104: the Channel Processing subsystem is revised physical channel and is set up message according to PN cell set configuration, and amended physical channel is set up message sends to the chip drives unit.
Revise physical channel and set up message,, join all kinds of physical channels with sub-districts all in the PN cell set and set up in the entrained set of sectors of message described promptly according to the configuration of PN cell set.
Step 105: set of sectors in the message is set up according to physical channel in the chip drives unit, and modem module that will be corresponding with described set of sectors all sectors in described set of sectors enable.
For example, in the enhancing group calling based on CDMA technology digital cluster system standard, the physical channel of Chu Liing has F-FCH, F-SCH and R-FCH like this; In conventional group calling, the physical channel of Chu Liing has F-FCH, F-BCH, R-FCH and R-BCH like this.
Concrete, when under with the PN sub-district, setting up trunked call, the physical layer Traffic Channel of being set up is all carried out following conversion: forward traffic channel sends identical signal with the technology that More Soft Handoff adds with same modulating unit all sub-districts in organizing with PN, as F-FCH and the F-BCH based on conventional group calling in the CDMA technology digital cluster system standard; Strengthen the F-FCH and the F-SCH of group calling; Reverse traffic channel is also collected the reverse signal of organizing interior all sub-districts with PN with the technology that More Soft Handoff adds with same demodulating unit, and merge demodulation as different multipaths, as R-FCH and R-BCH based on conventional group calling in the CDMA technology digital cluster system standard; Strengthen the R-FCH of group calling.
Step 106: keep trunked call.
Step 107: the user initiates cluster and discharges, and base station system sends all kinds of tear down message to the Channel Processing subsystem.
Tear down message is carried the physical channel that needs dismounting at least.
Step 108: the Channel Processing subsystem discharges all sub-districts that the related physical channel is served according to tear down message, carries out the modulation resource release flow then and removes the related physical channel, and flow process finishes.
Step 109: carry out normal trunked call foundation and discharge flow process.
Fig. 2 is the realization system configuration schematic diagram that the present invention is based on the same PN area group of CDMA cluster system, as shown in Figure 2, the realization system that the present invention is based on the same PN area group of CDMA cluster system comprises: terminal request receiving element 21, Channel Processing subsystem 22, channel resource are set up unit 23, trunked call holding unit 24, wherein
Terminal request receiving element 21 is used for the trunked call that receiving terminal is initiated, and notification channel processing subsystem 22;
Channel Processing subsystem 22, be used for judging whether the related set of sectors of all users of trunked call correspondence exists the sub-district with PN, and whether set up channel resource for described with the PN cell set, exist in the related set of sectors of all users of trunked call correspondence with the PN sub-district, and set up channel resource for described with the PN cell set, then notify trunked call holding unit 24; Exist with the PN sub-district in the related set of sectors of all users of trunked call correspondence, and set up channel resource for described with the PN cell set, then the notification channel resource is set up unit 23;
Channel resource is set up unit 23, is used for the notice according to Channel Processing subsystem 22, sets up the channel resource with the PN cell set, and notifies trunked call holding unit 24 after foundation is finished;
Trunked call holding unit 24 is used for keeping trunked call according to the notice of setting up unit 23 from Channel Processing subsystem 22 or channel resource.
This system also comprises with PN cell set dispensing unit 25, is used to carry out dispose with the PN cell set.
Channel resource is set up unit 23 and specifically comprised: chip drives unit 231 and modem module provide unit 232,
Terminal request receiving element 21 notification channel processing subsystems 22 are: terminal request receiving element 21 sends the corresponding physical channel and sets up message to Channel Processing subsystem 22;
Chip drives unit 231, be used for providing modem module all sectors in described set of sectors corresponding in the unit 232 to enable modem module with described set of sectors according to the set of sectors of setting up message from the physical channel of Channel Processing subsystem 22;
Modem module provides unit 232, is used to provide modem module.
Terminal request receiving element 21 also is used to receive the Client-initiated cluster and discharges request, and notification channel processing subsystem 22;
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (10)
1. implementation method based on the same PN area group of CDMA cluster system is characterized in that this method comprises:
Terminal is initiated trunked call under with the PN sub-district, base station system judges in the related set of sectors of all users of trunked call correspondence and exist with the PN sub-district, and base station system sets up channel resource for described with the PN cell set, and then base station system keeps trunked call; Base station system judges that existence is with the PN sub-district in the related set of sectors of all users of trunked call correspondence, and base station system is not set up channel resource with the PN cell set for described, and then base station system is describedly to set up channel resource and keep trunked call with the PN cell set.
2. the implementation method with the PN area group according to claim 1, it is characterized in that, described terminal is initiated under with the PN sub-district before the trunked call, also comprise step: base station system is carried out with the configuration of PN cell set, and described the configuration with the PN cell set comprises at least: each sub-district that comprises with the PN cell set, each main plot with the PN cell set.
3. the implementation method with the PN area group according to claim 2, it is characterized in that, when described terminal is initiated trunked call under with the PN sub-district, base station system sends physical channel and sets up message to the Channel Processing subsystem, and described physical channel is set up the related set of sectors of all users that message is carried the trunked call correspondence;
Described base station system for setting up channel resource with the PN cell set is:
The Channel Processing subsystem, is revised physical channel and is set up message with PN cell set configuration according to described, and amended physical channel is set up message sends to the chip drives unit;
Set of sectors in the message is set up according to physical channel in the chip drives unit, and modem module that will be corresponding with described set of sectors all sectors in described set of sectors enable.
4. the implementation method with the PN area group according to claim 3, it is characterized in that, described Channel Processing subsystem is revised physical channel and is set up message and be: according to the configuration of PN cell set, join physical channel with sub-districts all in the PN cell set and set up in the entrained set of sectors of message described.
5. the implementation method with the PN area group according to claim 2, it is characterized in that, described terminal is initiated under with the PN sub-district before the trunked call, also comprise step: when enabling the cluster Dedicated Control Channel with main plot in the PN cell set, base station system is according to the configuration of PN cell set, adds in the set of sectors that the sub-district joins described cluster Dedicated Control Channel as More Soft Handoff with all the other sub-districts in the PN cell set described.
6. the implementation method with the PN area group according to claim 1 is characterized in that, this method also comprises step: when the user initiated cluster release, base station system sent tear down message to the Channel Processing subsystem;
The Channel Processing subsystem discharges all sub-districts that the related physical channel is served according to tear down message, carries out the modulation resource release flow then and removes the related physical channel.
7. realization system based on the same PN area group of CDMA cluster system, it is characterized in that this system comprises: terminal request receiving element, Channel Processing subsystem, channel resource are set up unit, trunked call holding unit, wherein,
Described terminal request receiving element is used for the trunked call that receiving terminal is initiated, and the notification channel processing subsystem;
Described Channel Processing subsystem, be used for judging whether the related set of sectors of all users of trunked call correspondence exists the sub-district with PN, and whether set up channel resource for described with the PN cell set, exist in the related set of sectors of all users of trunked call correspondence with the PN sub-district, and set up channel resource for described with the PN cell set, then notify the trunked call holding unit; Exist with the PN sub-district in the related set of sectors of all users of trunked call correspondence, and set up channel resource for described with the PN cell set, then the notification channel resource is set up the unit;
Described channel resource is set up the unit, is used for the notice according to the Channel Processing subsystem, sets up the channel resource with the PN cell set, and notifies the trunked call holding unit after foundation is finished;
Described trunked call holding unit is used for keeping trunked call according to the notice of setting up the unit from Channel Processing subsystem or channel resource.
8. the realization system with the PN area group according to claim 7 is characterized in that, this system also comprises with PN cell set dispensing unit, is used to carry out dispose with the PN cell set.
9. the realization system with the PN area group according to claim 8 is characterized in that described channel resource is set up the unit and specifically comprised: chip drives unit and modem module provide the unit,
Described terminal request receiving element notification channel processing subsystem is: the terminal request receiving element sends the corresponding physical channel and sets up message to the Channel Processing subsystem;
Described Channel Processing subsystem, also be used for existing with the PN sub-district in the related set of sectors of all users of trunked call correspondence, and for described when setting up channel resource with the PN cell set, according to described same PN cell set configuration with PN cell set dispensing unit, revise physical channel and set up message, and amended physical channel is set up message send to the chip drives unit;
Described chip drives unit is used for providing modem module all sectors in described set of sectors corresponding with described set of sectors in the unit to enable modem module according to the set of sectors of setting up message from the physical channel of Channel Processing subsystem;
Described modem module provides the unit, is used to provide modem module.
10. the realization system with the PN area group according to claim 7 is characterized in that,
Described terminal request receiving element also is used to receive the Client-initiated cluster and discharges request, and the notification channel processing subsystem;
Described Channel Processing subsystem also is used for the notice according to the terminal request receiving element, discharges all sub-districts that the related physical channel is served, and carries out the modulation resource release flow then and removes the related physical channel.
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