CN100508633C - Group switching method and device - Google Patents
Group switching method and device Download PDFInfo
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- CN100508633C CN100508633C CNB2007100909917A CN200710090991A CN100508633C CN 100508633 C CN100508633 C CN 100508633C CN B2007100909917 A CNB2007100909917 A CN B2007100909917A CN 200710090991 A CN200710090991 A CN 200710090991A CN 100508633 C CN100508633 C CN 100508633C
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Abstract
The method includes steps: when it is needed to switch to target cluster, user terminal configures wireless channel parameters of target cluster based on information obtained in advance; based on configured parameters, user terminal switches to target cluster. The invention also discloses a user terminal. Eliminating procedure for reselecting sector and rebuilding link in procedure of switching clusters by user terminal, the invention reconfigures channel directly so as to reach purpose of quick switching clusters, and raise speed of switching to different clusters for user terminal.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of method and apparatus that switches group.
Background technology
At GSM-R (Global System for Mobile Communications for Railway, railway combined digital mobile communication system) the voice group call service VGCS of system (Voice Group CallService, voice group call service) and Voice Broadcast Service VBS (Voice Broadcast Service, Voice Broadcast Service) in, can there be a plurality of VGCS/VBS group simultaneously.And user terminal can only be selected a group call at synchronization, and like this, when the user need be concerned about several cluster communication simultaneously, it is particularly necessary that the quick switching between different groups just seems.
User terminal can receive network side at NCH (NotificationChannel under IDLE (free time) state, the notification message channel) notification message of all groups that issue on the channel, this message comprises the ID (Identity of group, identity), the area I D of group, group service type (VGCS/VBS), group's priority, all information such as group's wireless channel parameter, the user terminal analysis is also preserved all group informations in real time, so which group user terminal can detect is emerging group, the group of which existence disappears, can switch into so can judge which group when switching, which group can not switch.Under the IDLE state, user terminal is selected in real time and is resided on the strongest sub-district of signal strength signal intensity by the sub-district gravity treatment.
In the prior art, the process that user terminal switches between different groups is as follows:
According to gsm protocol, the user is switched between different groups and is divided into two independently processes: at first be to leave current group call; Be to add other group then.Its complete process as shown in Figure 1, switching to the B of group with user terminal from the A of group is example, comprises the steps:
When step s101, user terminal are in the accepting state of the A of group, receive the request that switches to the B of group.
Step s102, user terminal disconnect and being connected with the channel of the A of network side group, and this is connected to local connect (a local link).This disconnection process relates to gsm protocol 44.008 3.4.15, can not send out message to the base station, just disconnects local TCH (Traffic Channel, Traffic Channel) channel link.
Step s103, user terminal enter the IDLE state and carry out sub-district gravity treatment judgement, when needs carry out the sub-district gravity treatment user terminal place Serving cell are switched.After the sub-district gravity treatment finishes, after terminal resides in a Serving cell, begin to monitor the NCH channel and receive group's notification message.
Step s104, the information that obtains from notification message show that to be switched target group B exists.
Step s105, user terminal configure wireless channel, switch to the communication that respective channel is answered the B of group, finish whole group handoff procedure.
The defective of group's switching flow is in the prior art: a normal cell reselection process can reach the several seconds, and is very consuming time when causing user terminal to switch between a plurality of groups.
Summary of the invention
Embodiments of the invention provide a kind of method and user terminal that switches group, and the switch speed when switching in group to improve user terminal reduces the stand-by period.
For achieving the above object, embodiments of the invention provide a kind of method of switching group, comprise the steps:
When the user terminal in the current group receives the request of switching to target group, according to the wireless channel parameter of the described target group of obtaining in advance of information configuration;
Described user terminal switches to described target group according to the parameter of described configuration;
The described information of obtaining in advance is that described user terminal receives under idle condition or under the group of received state or under the group transmit status and the notification message of each group of storage, comprises the wireless channel parameter of each group in the described notification message.
Embodiments of the invention also provide a kind of method of switching group, comprise the steps:
When the user terminal that is in the group of received state receives the request of switching to target group, according to the wireless channel parameter of the described target group of obtaining in advance of information configuration;
Described user terminal is finished to described target group by the configuration of described parameter and is switched;
The described information of obtaining in advance is the notification message of described user terminal each group of receiving under idle condition or under the group of received state and storing, comprises the wireless channel parameter of each group in the described notification message.
Embodiments of the invention also provide a kind of method of switching group, comprise the steps:
The user terminal that is in the group transmit status receives when the request that target group is switched, and discharges the up link of current group;
Described user terminal is according to the wireless channel parameter of the described target group of obtaining in advance of information configuration;
Described user terminal is finished to described target group by the configuration of described parameter and is switched;
The described information of obtaining in advance is that described user terminal receives under idle condition or under the group transmit status and the notification message of each group of storage, comprises the wireless channel parameter of each group in the described notification message.
Embodiments of the invention also provide a kind of user terminal, comprising:
The handoff request receiving element receives the request of being switched to target group by current group;
The state judging unit when described handoff request receiving element receives handoff request, judges whether the current up link of described user terminal is occupied;
Processing unit when described state judgment unit judges result is up link when occupied, discharges described up link;
Dispensing unit is up link when unoccupied in described state judgment unit judges, the wireless channel parameter of configuration switching target group;
Switch unit according to the wireless channel parameter of described dispensing unit configuration, switches to described target group.
Compared with prior art, embodiments of the invention have the following advantages:
Embodiments of the invention are cast out cell reselection process and are rebuild the link process by to the switching of user terminal between different groups the time, improve the speed that user terminal switches between different groups greatly.
Description of drawings
Fig. 1 is the flow chart that user terminal switches between different groups in the prior art;
Fig. 2 is in the flow chart that the user terminal of group of received state switches between different groups in the first embodiment of the invention;
Fig. 3 is the flow chart that switches between different groups of user terminal that is in the group transmit status in the second embodiment of the invention;
Fig. 4 is used for group's structural representation of the user terminal of switching fast in the third embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment, embodiments of the present invention are described further.
Embodiments of the invention one are cast out cell reselection process and are rebuild the link process during for the switching between different groups of the user terminal that is in the group of received state, directly reconfigure the process that channel switches group fast.In the group of received state, network side does not distribute the dedicated channel that is connected with network side for user terminal, user terminal receives group allocation in unresponsive mode and gives the voice broadcast service channel of sub-district or the message of voice group call service channels downlink, user terminal is selected in real time and is resided on the strongest sub-district of signal strength signal intensity by the sub-district gravity treatment corresponding to the state of hearer among VGCS or the VBS at this moment.Under this state, user terminal can be at FACCH (Fast Associated Control Channel, Fast Associated Control Channel) channel receives the notification message of group, detect emerging group and preserve its wireless channel parameter, but with different from the notification message of the group that the NCH channel receives under the IDLE state, user terminal is not only by judging from the notification message of FACCH channel whether the group that has existed disappears.
Switching to target group B with user terminal from the current A of group is example, and the method for the switching group among the embodiment one may further comprise the steps as shown in Figure 2:
When step s201, user terminal are in the accepting state of the A of group, receive the request of switching to the B of group.
In this step, the prerequisite that switches to the request of the B of group is, the wireless channel parameter that has listened to the existence of the B of group and stored the B of group during the IDLE state of user terminal before connecting or switching to the A of group.
Step s202, user terminal configuration bottom are the wireless channel parameter of the B of group.
In this step, because different groups has different wireless channel parameters, so the information of the target group B that the user terminal basis has been stored, the configuration bottom is the wireless channel parameter of this target group B, and the bottom here is meant data link layer and physical layer.The foundation of configuration is a user terminal at before IDLE state or current group of received state (group receive) the state group information table of acquisition down.And the wireless channel parameter comprises: Traffic Channel pattern, timeslot number, absolute frequency point number (non-frequency-hopping mode), frequency hop sequences (frequency-hopping mode), training sequence etc. are described the necessary parameter of radio traffic channel.
Step s203, user terminal finish switching to the B of group by the parameter of configuration, answer the communication of the B of group.
This is set up process and relates to gsm protocol 44.008 3.4.15, does not need to send any message to the base station, and user terminal is similarly local links (local link) with linking of the B of group.
The problem that may run in this step is, though user terminal before being connected to the A of group the IDLE state or current group of received state in detected the existence of the B of group, even but the B of group is because certain reason disappears afterwards, be in user terminal among the A of group because of the notification message of the group that can't receive the NCH channel always, therefore can't detect the B of group and not exist, can cause user terminal to configure the bottom parameter and switch to the B of group that has disappeared.In this case, the direct configuration parameter of user terminal also switches to the B of group, can switch to momently in the non-existent group, answers less than any information this moment.Behind the process inefficacy monitoring time of systemic presupposition, user terminal can detect Radio Link and lose efficacy, and gets back to the IDLE state automatically, can continue this moment to select to switch to other groups.
Compared with prior art, do not relate in the above-mentioned flow process at first disconnect with current group link, enter then the cell reselection process under the IDLE state, but this can't impact the switching of normal group.This is because for the VGCS/VBS business, the user terminal most of the time is the hearer down, promptly be in group of received (group receive) state, because the user terminal that 0408 li regulation of gsm protocol is under the group of received can carry out the sub-district gravity treatment at any time, so there is no need to do the sub-district gravity treatment when the user withdraws from the group of received state eventually and leaves current group.Can carry out the sub-district gravity treatment because be in the user terminal of group of received state, at any time select optimum sub-district as Serving cell, carry out the sub-district gravity treatment and there is no need to break at group's handoff procedure, do not carry out the sub-district gravity treatment when therefore switching group and do not have any influence.
Be in group transmit status (group transmit) if user terminal is not in the group of received state, then can not directly switch group, and need at first carry out the change of state with reference to flow process described in the embodiment of the invention one.In the group transmit status, network side is that the user terminal of voice group call service has distributed special-purpose channel, and especially, user terminal utilizes the up link of this channel to be used for mass-sending communication.User terminal is selected in real time and is resided on the strongest sub-district of signal strength signal intensity by cell switch process corresponding to the state of speaker among VGCS or the VBS.Under this state, user terminal can be at FACCH (Fast Associated ControlChannel, Fast Associated Control Channel) channel receives the notification message of group, detect emerging group and preserve its wireless channel parameter, but with different from the notification message of the group that the NCH channel receives under the IDLE state, user terminal is not only by judging from the notification message of FACCH channel whether the group that has existed disappears.
In the embodiments of the invention two, the flow process that the user terminal that is in the group transmit status switches group comprises the steps: as shown in Figure 3
When step s301, user terminal are in the group transmit status of the A of group, receive the request of switching to the B of group.
Step s302, user terminal discharge the up link among the A of group, enter the group of received state.
Step s303, user terminal configuration bottom are the wireless channel parameter of the B of group.
Step s304, user terminal finish switching to the B of group by the parameter of configuration, answer the communication of the B of group.
For the terminal that is in the group transmit status, use above-mentioned process by discharging up link, directly switching then to target group, can not impact normal use yet.Though this is can't carry out the sub-district gravity treatment because be in the user terminal of group transmit status, can under the not good situation of current area signal quality, select optimum sub-district as Serving cell at any time by cell switch process.Therefore discharging up link and direct in the process that target group is switched, do not carry out the sub-district gravity treatment and can normally not use yet because of the signal quality problems affect.
By the user terminal group changing method that uses above embodiment one and embodiment two to describe, by when switching, casting out cell reselection process and rebuilding the link process, realized being in the group of received state and switched fast, saved group greatly and switched required time with the group of the user terminal of group transmit status.
Embodiments of the invention three also provide a kind of user terminal that group switches fast that is used for, as shown in Figure 4, comprise handoff request receiving element 10, state judging unit 20, processing unit 30, dispensing unit 40, switch unit 50, receiving element 60 and memory cell 70.
Particularly, handoff request receiving element 10 receives the request of being switched to target group by current group.
Processing unit 30 when the judged result of state judging unit 20 is up link when occupied, discharges up link, promptly enters the group of received state from the group transmit status, switches for ensuing group and prepares.
Dispensing unit 40 is under the d/d situation of up link in the judged result of state judging unit 20, obtains the wireless channel parameter of target group from memory cell 70, and the bottom of user terminal is configured to this parameter of target group.
The notification message of all groups that receiving element 60 reception network sides issue comprises all information such as the ID of group, the area I D of group, group service type (VGCS/VBS), group's priority, group's wireless channel parameter.
Notification message that the network side that memory cell 70 receives receiving element 60 sends and information such as channel parameter are wherein stored, for the needs of dispensing unit 40 in group's switching.
By the user terminal that uses the foregoing description three to describe, realized the quick switching of user terminal group, saved the time of required wait when user terminal switches in group greatly.
More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (9)
1, a kind of method of switching group is characterized in that, comprises the steps:
When the user terminal in the current group receives the request of switching to target group, according to the wireless channel parameter of the described target group of obtaining in advance of information configuration;
Described user terminal switches to described target group according to the parameter of described configuration;
The described information of obtaining in advance is that described user terminal receives under idle condition or under the group of received state or under the group transmit status and the notification message of each group of storage, comprises the wireless channel parameter of each group in the described notification message.
2, switch the method for group according to claim 1, it is characterized in that, the step that described user terminal switches to described target group according to the parameter of described configuration specifically comprises:
Described user terminal is in the wireless channel parameter of link layer and the described target group of physical layer configurations;
Finish to described target group switching by the configuration of described parameter.
3, switch the method for group according to claim 1, it is characterized in that, described user terminal receives before the request that target group is switched or after the request, at any time according to the signal(l)ing condition of current service cell and adjacent sub-district, carry out sub-district gravity treatment or sub-district and switch, select the best sub-district of signal quality as Serving cell.
4, switch the method for group according to claim 1, it is characterized in that, when the up link of described user terminal is taken by current group, before the wireless channel parameter of the described target group of configuration, also comprise:
Described user terminal discharges the up link of current group.
5, switch the method for group according to claim 1, it is characterized in that, when described target group was switched, if described target group does not exist, then described user terminal entered idle IDLE state to described user terminal according to the parameter of described configuration.
6, a kind of method of switching group is characterized in that, comprises the steps:
When the user terminal that is in the group of received state receives the request of switching to target group, according to the wireless channel parameter of the described target group of obtaining in advance of information configuration;
Described user terminal is finished to described target group by the configuration of described parameter and is switched;
The described information of obtaining in advance is the notification message of described user terminal each group of receiving under idle condition or under the group of received state and storing, comprises the wireless channel parameter of each group in the described notification message.
7, a kind of method of switching group is characterized in that, comprises the steps:
The user terminal that is in the group transmit status receives when the request that target group is switched, and discharges the up link of current group;
Described user terminal is according to the wireless channel parameter of the described target group of obtaining in advance of information configuration;
Described user terminal is finished to described target group by the configuration of described parameter and is switched;
The described information of obtaining in advance is that described user terminal receives under idle condition or under the group transmit status and the notification message of each group of storage, comprises the wireless channel parameter of each group in the described notification message.
8, a kind of user terminal is characterized in that, comprising:
The handoff request receiving element receives the request of being switched to target group by current group;
The state judging unit when described handoff request receiving element receives handoff request, judges whether the current up link of described user terminal is occupied;
Processing unit when described state judgment unit judges result is up link when occupied, discharges described up link and notifies described state judging unit;
Dispensing unit, when described state judgment unit judges up link is unoccupied, the wireless channel parameter of configuration switching target group;
Switch unit according to the wireless channel parameter of described dispensing unit configuration, switches to described target group.
9, as user terminal as described in the claim 8, it is characterized in that, also comprise:
Receiver module receives the notification message that comprises this group's wireless channel parameter of each group;
Memory cell is stored each group's wireless channel parameter that described receiver module receives.
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| CNB2007100909917A CN100508633C (en) | 2007-03-30 | 2007-03-30 | Group switching method and device |
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| CNB2007100909917A CN100508633C (en) | 2007-03-30 | 2007-03-30 | Group switching method and device |
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| CN100508633C true CN100508633C (en) | 2009-07-01 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101453763B (en) * | 2007-11-30 | 2012-06-27 | 华为技术有限公司 | Method and equipment for group handoff |
| CN101562859B (en) * | 2008-04-15 | 2012-05-16 | 中兴通讯股份有限公司 | Method and terminal for realizing auto-switching of cluster terminal |
| US9220001B2 (en) * | 2010-09-28 | 2015-12-22 | Motorola Solutions, Inc. | Methods and systems for group calls in a wireless communication network |
| CN102187695A (en) * | 2011-04-14 | 2011-09-14 | 华为终端有限公司 | Method and apparatus for switching calling groups |
| US9913110B2 (en) | 2014-10-08 | 2018-03-06 | Motorola Solutions, Inc. | Methods and systems for implementing a self-managed control channel |
| CN106304378A (en) * | 2015-06-04 | 2017-01-04 | 中兴通讯股份有限公司 | Group calling method in a kind of trunked communication system and device |
| CN106341796B (en) * | 2016-10-24 | 2019-12-27 | 海能达通信股份有限公司 | Group calling service realization method, terminal and base station system |
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| CN1585554A (en) * | 2004-06-12 | 2005-02-23 | 中兴通讯股份有限公司 | Method for realizing hard changing-over in CDMA cluster system |
| CN1735269A (en) * | 2004-08-02 | 2006-02-15 | 华为技术有限公司 | Cross district switching method for colony mobile station |
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| CN1585554A (en) * | 2004-06-12 | 2005-02-23 | 中兴通讯股份有限公司 | Method for realizing hard changing-over in CDMA cluster system |
| CN1735269A (en) * | 2004-08-02 | 2006-02-15 | 华为技术有限公司 | Cross district switching method for colony mobile station |
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