CN100442872C - Method for realizing PoC business - Google Patents
Method for realizing PoC business Download PDFInfo
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- CN100442872C CN100442872C CNB2005101173314A CN200510117331A CN100442872C CN 100442872 C CN100442872 C CN 100442872C CN B2005101173314 A CNB2005101173314 A CN B2005101173314A CN 200510117331 A CN200510117331 A CN 200510117331A CN 100442872 C CN100442872 C CN 100442872C
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Abstract
The present invention discloses a method for realizing PoC business, which is applied to a WCDMA network. The method for realizing PoC business comprises that a PoC user is registered in a PoC server; a group speaking user transfers PoC business information to affiliated radio access network RAN nodes on a hollow opening through an uplink dedicated channel DCH; the RAN nodes transfer the received business information to the PoC server through common business channels among all levels of network nodes; the PoC server issues the PoC business information to the affiliated RAN nodes of a PoC group listening user through the common business channels among all levels of network nodes; the affiliated RAN nodes transfer the received PoC business information to the group listening user through PoC business channels OTCH which is newly added. The method for realizing PoC business of the present invention can be adopted for reducing the occupation of network transmission resources, avoiding the complex signaling process of carrying out point to point transmission to each group user, reducing the time delay of a user end to obtain the business information, and satisfying the specific requirement to QoS from the PoC business.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of PoC service implementation method.
Background technology
Existing universal mobile telecommunications system (Universal Mobile Telecommunications System, UMTS) be the 3-G (Generation Three mobile communication system) that adopts the WCDMA air interface technologies, usually also the UMTS system is called the WCDMA communication system, it provides the various wireless traffics from voice to the wideband data.The WCDMA system has adopted and the similar structure of second generation mobile communication system, comprise Radio Access Network (Radio Access Network, RAN) and core network (Core Network, CN).Wherein Radio Access Network is used to handle all and wireless function associated, and CN handles that all voice calls are connected with data in the UMTS system, and the exchange of realization and external network and routing function.CN from be divided in logic circuit commutative field (Circuit Switched Domain, CS) and packet-switched domain (PacketSwitched Domain, PS).(User Equipment UE) has constituted whole UMTS system together for UTRAN, CN and subscriber equipment.The CS territory mainly provides the business of traditional circuit exchange mode, as voice and fax etc.; The PS territory mainly provides the bag interactive service based on IP, as file transfer protocol (FTP) (FileTransfer Protocol, FTP), HTTP (Hyper Text Transport Protocol, HTTP) etc.
Along with popularizing and the expansion of IP network of IP communication mode, require communication to develop, to improve the cost that interoperability between the network and reduction are communicated by letter to the IP direction.Therefore (IP Multimedia System, notion IMS), target are that similar CS is provided in IP network the business in territory, to accomplish the merging of core net to CS and PS territory to have introduced IP Multimedia System in 3GPP R5/R6 agreement.IMS provides one to overlap QoS management method and strategy end to end, by carrying control and professional separating of controlling, make business end to end QoS be guaranteed.The newly-increased cover novel entities of network is handled and is used relevant signaling and user's stream, i.e. IP multimedia CN subsystem, IMS, and all IMS entities are positioned at core net, and the influence of non-IMS network entity is reduced to minimum.3GPP has selected fixedly Internet multimedia call control protocol session initiation protocol (the Session Initiated Protocol of ietf definition, SIP) as the main agreement in IMS territory, Session Initiation Protocol semanteme flexibly helps to further develop, and helps 3GPP network and the fixedly intercommunication between the IP network.The transmission of IMS signaling and user data, the bearer service that the IMS entity utilizes PS and UTRAN to provide.(Access Network, AN) customer traffic is all thought with IMS signaling and IMS application stream in the territory, so very little to non-IMS entity influence for PS and Access Network.
PoC (PTT over Cellular is based on the PTT business of cellular network) business is one of main business that is defined in the IMS territory.It provides the point-to-multipoint half-duplex operation function of similar trunking communication, the voice communication of point-to-multipoint mainly is provided, communication be pre-defined at one or the PoC that temporarily convenes group in carry out, at synchronization, can only have a user to talk at most in the PoC group, other users can only answer speech.In the communication mode after expansion, can provide communicating by letter of multiple media formats such as note, image and Streaming Media.
Mainly realize the control logic of PoC service in the prior art by the service control function in IMS territory, the business of the point-to-multipoint of PoC is finished in traditional point-to-point carrying that the control of carrying is used owing to the carrying design that is subjected to WCDMA itself.This mode makes carrying and flow process not be optimized at the characteristic of PoC service, causes satisfying the specific (special) requirements of PoC service to QoS, makes that the time delay of PoC service is long, influences user's use.From the angle of operator, prior art is not optimized on resource occupation simultaneously, makes that cost and the point-to-point service of carrying out PoC service are suitable, therefore lacks competitiveness.And adopt this P-2-P technology that more concurrent processing process is arranged, in PoC group and group the PoC number of users more for a long time, concurrent processing is bigger to system shock, influence stablizing of system and normally carrying out of other business.And owing to be subjected to the channel code in the CDMA CDMA communication and the restriction of power resource, the PoC group number and the number of users in the PoC group of its support are all very limited, do not satisfy the requirement to number of users of PoC and group service.
Summary of the invention
The invention provides a kind of PoC service implementation method, make the problem that service delay is long, have the professional expansion of concurrent processing influence when the employing point-to-point communication mode that exists in the prior art realizes PoC service in order to solve.
The inventive method comprises:
PoC group user is registered in the PoC server, is shared as the service resources of this PoC set of dispense;
The group spoken user is eating dishes without rice or wine to transmit PoC service information to affiliated Radio Access Network RAN node by special uplink channel DCH; The RAN node sends the business information that receives to the PoC server by the CTCH Common Traffic Channel between the network nodes at different levels under the group spoken user;
The PoC server issues PoC service information by the CTCH Common Traffic Channel between the network nodes at different levels and listens RAN node under the user for the PoC winding; Winding is listened the affiliated RAN node of user to send the PoC service information that receives to winding by newly-increased PoC service channel OTCH and is listened the user.
According to said method of the present invention, the RAN node sends signaling data and transmission power control information by the special-purpose DCH down channel of eating dishes without rice or wine to described group of spoken user under the group spoken user, controls the power of the up DCH channel of described group of spoken user.
According to said method of the present invention, after PoC organized first start user is registered to the PoC server, affiliated radio network controller (RNC) was set up this group example that is used for storage sets information and group user profile in this locality, and is this PoC set of dispense service resources; After the follow-up start user registration of this PoC group, affiliated RNC joins the follow-up start user of this PoC group in the group example of foundation, is shared as the service resources of this set of dispense.
According to said method of the present invention, winding is listened in the affiliated RAN node of user and also is provided with PoC indicating channel OICH and PoC control channel OCCH; Broadcasting group information updating indication in the described OICH channel, described OCCH Channel Transmission group information and OTCH channel information;
When the group user is in standby condition, monitor described OICH channel, obtain the group information updating indication; When PoC group is in state of activation, winding listen the user according to the group information updating on the described OICH channel indication obtain group information and OTCH channel information from described OCCH channel, receive business information from described OTCH channel.
Described OICH channel is a physical channel; Described OICH channel information sends by system broadcast message; When the group user is in standby condition, specifying the moment to monitor described OICH channel.
The described OCCH channel information cycle sends; Winding listens the user to obtain described OCCH channel information by system message.
According to said method of the present invention, a described OTCH channel is set for each PoC group; A described OCCH channel is set in each sub-district; Described OTCH channel and described OCCH channel are logic channel, all are multiplexed on the forward access channel FACH.
Described OTCH channel and described OCCH channel all are assigned with a Logic Channel Identifier, and the group user is the different logic channel of identification when receiving the FACH channel information.
According to said method of the present invention, after the group user receives the idle Indication message of right of speech that the PoC server sends, send by Random Access Channel RACH and to rob the power request, listen the user to become the group spoken user by winding.
If the priority of listening user is higher than current spoken user, can under the situation of not receiving the idle Indication message of right of speech, send the power of robbing by the RACH channel and ask, listen the user to become the group spoken user by winding.
If the current state of PoC group is a state of activation, winding is listened the user to become the group spoken user to carry out PoC service and comprise following concrete steps:
The message part that A1, winding listen user terminal to insert by RACH carries the power of robbing and asks to send to affiliated RNC;
A2, winding are listened under the user RNC to transmit this power of robbing by the CTCH Common Traffic Channel between the network nodes at different levels to ask the PoC server; And second state of power requesting users state from first state transition of non-spoken user to spoken user will be initiated to rob;
A3, PoC server return robs the power success message, and transmission is robbed the power requesting users and become spoken user, sends business information by up DCH channel;
A4, PoC server stop to send the idle Indication message of described right of speech, and are seized message by the right of speech that current spoken user sign is carried in network nodes transmissions at different levels and listen the user to winding;
A5, winding listen the user to receive described business information from described OTCH channel.
If the current state of PoC group is a standby condition, winding is listened the user to become the group spoken user to carry out PoC service and comprise following concrete steps:
The message part that B1, winding listen user terminal to insert by RACH carries the described power of robbing and asks to send to affiliated RNC;
B2, winding are listened under the user RNC to transmit this power of robbing by the CTCH Common Traffic Channel between the network nodes at different levels to ask the PoC server; And with initiation rob power requesting users state from described first state transition to described second state;
B3, PoC server return robs the power success message, and transmission is robbed the power requesting users and become spoken user, sends business information by up DCH channel;
B4, PoC server stop to send the idle Indication message of described right of speech, and are seized message to RAN node under the group user by the right of speech that current spoken user sign is carried in network nodes transmissions at different levels;
The RAN node was broadcasted the group information updating indication under the user was listened in B5, winding in described OICH channel, and indication group user reads described OCCH channel information, simultaneously transmission group information and OTCH channel information on described OCCH channel;
B6, winding listen the user to obtain group information and OTCH channel information from described OCCH channel, receive business information from described OTCH channel.
RAN node under the PoC group that is in the PoC state of activation does not have spoken user in a period of time, the PoC server is organized to PoC by the CTCH Common Traffic Channel transmission group state transition order between the network nodes at different levels;
The RAN node issues group state transition order under the PoC group on described OTCH channel;
After the group spoken user receives described group of state transition order from described OTCH channel, oneself state is moved to described first state.
According to said method of the present invention, listen the user need carry out the sub-district when the PoC winding and switch, and during existing this group PoC service of Target cell, if PoC organizes the current PoC standby condition that is in, after user's decision switches to Target cell, send cell update message at Target cell; RNC in the Target cell notifies the persistent district of former community user to change after receiving cell update message, replys user's cell update acknowledge message simultaneously; After the user receives the cell update acknowledge message, just think to have switched to Target cell, and the OICH channel of intercept target sub-district;
If the PoC group is in the PoC state of activation, in the OTCH channel service information of the user that request is switched former sub-district before receiving switching, the OCCH channel that reads Target cell obtains Target cell OTCH channel information and group information, receives business information from Target cell OTCH channel after switching is finished.
If the PoC group is in the PoC state of activation, described switching user reads the OTCH channel service information in former sub-district and the Target cell simultaneously, and the business information that receives is merged.
According to said method of the present invention, listening the user need carry out the sub-district when the PoC winding switches, when Target cell does not have this group PoC service, if the PoC group is in the PoC standby condition, after the user switches to Target cell, in Target cell, set up OICH channel, OCCH channel and this group OTCH channel of handling PoC service, and monitor described OICH channel;
If the PoC group is in the PoC state of activation, the user that request is switched RNC under former sub-district sends the sub-district and changes Indication message, carries Target Cell Identifier in the message, and this group PoC service is set up in request in Target cell; After RNC receives that Indication message is changed in described sub-district under the former sub-district, in Target cell, set up OICH channel, OCCH channel and this group OTCH channel of handling PoC service, and broadcast the channel of setting up by system message; The user that request is switched monitors the OCCH channel that obtains from system message, obtain Target cell OTCH channel information and group information, receives business information from Target cell OTCH channel after switching is finished.
Beneficial effect of the present invention is as follows:
(1) the present invention uses the CTCH Common Traffic Channel of setting up between the network nodes at different levels to transmit PoC service information, therefore, only needs to transmit a business information between nodes at different levels, has reduced taking of network transmission resource.
(2) the present invention's eating dishes without rice or wine between Access Network and user terminal, newly-increased PoC service channel (OTCH) transmits PoC service information specially, whole groups of users in the sub-district receive business information on this OTCH channel, realize simply, avoided the complicated signaling process that carries out point-to-point transmission to each group user.
(3) the present invention's eating dishes without rice or wine between Access Network and user terminal, newly-increased PoC indicating channel (OICH) and PoC control channel (OCCH); Broadcasting group information updating indication on the OICH channel, transmission group information and OTCH channel information on the OCCH channel; The group user regularly monitors the OICH channel when the PoC standby condition, obtain this group information updating indication after, under PoC group state of activation, read the OCCH channel, obtain this group information and this group OTCH channel information, receive business information from this group OTCH channel; Adopt this mode, effectively reduce the time delay that user side obtains business information, satisfy the specific (special) requirements of PoC service QoS.
(4) adopt the inventive method, therefore the situation that does not exist the increase because of user data to exist service concurrence to handle, helps professional expansion without limits to number of users in the quantity of the PoC group of connecting system and each PoC group.
Description of drawings
Fig. 1 is the professional schematic flow sheet that transmits of the inventive method;
Fig. 2 is PoC user's start-up logging flow chart;
Fig. 3 seizes flow chart for the user under the PoC standby condition;
Fig. 4 seizes flow chart for the user under the PoC state of activation.
Embodiment
Referring to Fig. 1, transmit schematic flow sheet for the inventive method is professional.As can be seen from the figure, whole PoC service requirements of process is by the multistage network node, be respectively wireless access network node (can be radio network controller (RNC) or base station node B), Serving GPRS Support Node (the Serving GPRS Support Node by eating dishes without rice or wine to be connected with PoC group user, SGSN) and Gateway GPRS Support Node (GatewayGPRS Support Node, GGSN); The GGSN node is connected with the PoC server.Solid arrow is represented the information flow of PoC service down direction among Fig. 1, gives listening user in the group from PoC server issuing service information; Dotted arrow is represented the information flow of PoC service up direction, and spoken user sends business information to the PoC server in the PoC group.
Service bearer among Fig. 1 passes through network nodes at different levels at last to the group user from the PoC server, is the tree of a handstand, and each network node all converges and distribute the data flow of all nodes under it.Because the unicity that business datum flows to all is a distributing data at each node of professional down direction, not the convergence service data.Owing to have only a user to produce business datum, the transmission of uplink business data is just fairly simple, eating dishes without rice or wine by dedicated channel (Dedicated Channel by spoken user, DCH) service data transmission, the CTCH Common Traffic Channel of setting up between terrestrial interface is by networks at different levels is transferred to the PoC server, by the PoC server again descending be distributed to the group in listening user.For signaling data, each has professional network node all will do to converge and distributes; For converging, network node can be issued target network node to the signaling that has transmitting side marking by common signal channel; For distribution, network node can be distributed to the reception user of appointment or all users in the group to data by common signal channel.
For those who answer, downlink service data can send a same copy to each those who answer.Therefore at each down direction, it is just passable that a last network node only need have the professional network node of this group to send a piece of data by the CTCH Common Traffic Channel of setting up (descending common data link) to the next one.Equally, for the relevant signaling transmission of group, it is just passable that a last network node only need have the professional network node of this group to send a signaling by the CTCH Common Traffic Channel of setting up (descending common signaling link) to the next one.
For the talker, between network nodes at different levels by up common data link and up common signaling link transmit traffic data and signaling data.
Eating dishes without rice or wine, in order to realize that whole PoC group users send business information simultaneously in the sub-district, need in the RAN node, increase PoC service channel (PoC Traffic Channel newly, OTCH), PoC control channel (PoC Control Channel, OCCH) and the PoC indicating channel (PoC Indication Channel, OICH).
Wherein, OTCH channel and OCCH channel all are the logic channel multicast channel, all be multiplexed into forward access channel (Forward Access Channel, FACH) on, with (the Multi-media Broadcast and Multi-cast Service of multimedia broadcast multicast service among the 3GPP, MBMS) (MBMS Traffic Channel, MTCH) (MBMS ControlChannel, MCCH) function class seemingly with the MBMS control channel for the MBMS Traffic Channel of Shi Yonging.Each PoC group has an OTCH channel, is used to transmit PoC service data and downlink signaling (comprising at the signaling of group with at the signaling of single UE).Each sub-district of OCCH channel has one, is used for UE and obtains group information (phase related control information of this group and user profile etc.) and OTCH channel information, and the OCCH channel information cycle sends.The user obtains the OCCH channel information by system message.According to the air protocol structure of 3GPP, OTCH and OCCH can be assigned with a Logic Channel Identifier, and user UE is the different logic channel of identification when receiving the FACH transmitting channel information.
The OICH channel is used to broadcast the group information updating indication, and user in the indication group reads the OCCH channel and obtains the relevant up-to-date information of this group.The information of OICH channel sends by system broadcast message.Page Indication Channel among OICH channel and the 3GPP (Paging Indication Channel, PICH) or the MBMS indicating channel (MBMS Indication Channel, function class MICH) seemingly belongs to physical channel.The user need specify constantly (fixed cycle that calculates by formula constantly) to monitor the OICH channel when group is in PoC and prepares (PoC Standby) state, whether obtains the indication relevant for this group information updating.If this group of indication information has renewal on the OICH channel, UE will read the content of OCCH channel at PoC state of activation (PoCActive) so, receive downlink business information from the OTCH channel.
Has only the signaling transmission owing to it is descending for spoken user in the group, in order to control the power of its reverse link traffic channel, the descending needs transmitted power control information, so descending needs are set up special-purpose DCH channel, as the signaling channel of 3.4kbps, be used to transmit downlink power control bit (bit) and top signaling.
For listening user in the group,, can not distribute special up channel to it if only carry out PoC service.In system, the residing state of listening user is defined as CELL PoC state (first state) in will organizing, be similar to the state of cell paging channel (CELL_PCH), in PoC service, user UE can receive the interior indication of perhaps monitoring the OICH channel of FACH channel under this state.If the user need send up signaling, as rob the power signaling, (Random Access Channel RACH) after the access, sends again to need to pass through Random Access Channel.
Specifically describe below and adopt said method of the present invention to be registered to the idiographic flow that PoC service is carried out from PoC user.
Referring to Fig. 2, be the idiographic flow of PoC user's start-up logging to the PoC server, the process of pressing the OMA normalized definition with 3GPP at present is identical, mainly comprises:
After the user UE start, be attached to the PS territory, set up Packet Data Protocol (Packet Data Protocol, PDP) context;
User UE is registered in the IMS territory;
User UE initiates register requirement (adopting the SIP INVITE) to the IMS core net;
The IMS core net is carried out authentication to user UE, after authentication is passed through, to PoC server forwards register requirement;
The PoC server returns the message that succeeds in registration (200OK) by the IMS core net to user UE.
After PoC organized first start user is registered to the PoC server, affiliated radio network controller (RNC) was set up this group example that is used for storage sets information and group user profile in this locality, and is this PoC set of dispense service resources; After the follow-up start user registration of this PoC group, affiliated RNC joins it in group example of foundation, is shared as the service resources of this set of dispense.
UE finishes the PoC service registration, and the PoC group is in PoC Standby state, UE is to the CELL_PoC state in migration, monitors OICH and PICH channel (monitoring the PICH channel is because UE also needs to carry out other business, system need be on the PICH channel to UE transmission beep-page message etc.); Be in PoC Active state when PoC organizes, then UE directly reads the information on the OCCH channel, after obtaining group information, directly receives the business information on the OTCH.
Referring to Fig. 3, when being in PoC Standby state for the PoC group, a certain user sends and robs the power order, becomes the flow chart that spoken user starts PoC service, comprises the steps:
Step 1, after certain user presses press-and-talk PTT key on the terminal, the message part that inserts by RACH carry described rob the power request send under the RAN node.
Step 2, RAN node (as RNC) will be robbed the power request by the CTCH Common Traffic Channel between the network nodes at different levels and be sent to the PoC server; Simultaneously RNC start the power request is robbed in transmission the state of UE from CELL_PoC state transition to cell private channel CELL_DCH state (second state).
Step 3, PoC server issue the indication (being that right of speech takies indication) that the user prepares for the speech to the network node that respectively has users, and carry the sign of wanting spoken user in the Indication message; The PoC server is robbed power requesting users UE answer expression to transmission and is robbed talk (Start To Speak, the STS) message of weighing successfully of beginning simultaneously.
Step 4, receive that each RNC that right of speech takies Indication message sends the group information updating Indication message on the OICH channel, indication group user reads the group information on the OCCH channel; While transmission group information on OCCH.
Step 5, spoken user begin speech from CELL_PoC state transition to the CELL_DCH state and after receiving the STS message of PoC server answer, send business information to the PoC server.
Listening user begins to receive the business information on the OTCH in step 6, the group.
Finish speech at certain spoken user, when unclamping the PTT key, the right of speech release signaling, will be by the DCH channel, be transferred to the PoC server, the PoC server will be further be transferred to each PoC user in the group to the idle signaling of right of speech by OTCH, and the user just can rob by the PTT key and weigh (user who is higher than current spoken user priority can not have the power of robbing under the idle situation of indicating of right of speech) after receiving the idle Indication message of right of speech.When PoC group current state is a PoC Active state, rob the power flow process as shown in Figure 4, comprise the steps:
Step 1, some windings listen the user to press press-and-talk PTT key on the terminal, the message part that inserts by RACH carry described rob the power request send under RAN node (as RNC);
Step 2, RNC transmit this power of robbing by the CTCH Common Traffic Channel between the network nodes at different levels asks to send to the PoC server; And with User Status from CELL_PoC state transition to the CELL_DCH state;
Step 3, PoC server are robbed power requesting users UE answer expression to transmission and are robbed talk (Start To Speak, the STS) message of weighing successfully of beginning;
Step 4, PoC server issue the indication (being that right of speech takies indication) that the user prepares for the speech to the network node that respectively has users and give listening user in the group, carry the sign of wanting spoken user in the Indication message;
Step 5, spoken user begin speech from CELL_PoC state transition to the CELL_DCH state and after receiving the STS message of PoC server answer, send business information to the PoC server.
The user is after receiving the idle Indication message of right of speech, if the current state of PoC group is a PoC Standby state, flow process is identical as shown in Figure 3 to rob the power flow process, does not repeat.
After having the user to obtain speaking right in the group, the PoC server will no longer send the idle indication information of right of speech, otherwise the idle indication information of right of speech will send to user in the group cycle.
Because PoC group user moves the position in communication network, might the user need switch between each sub-district; Provide specific descriptions to how carrying out PoC service in this case below.
The incision sub-district need be divided into two kinds of situations and consider: situation one: the sub-district that switches to existing this group PoC service; Situation two: switch to the sub-district that does not have this group PoC service.
For situation one, if the PoC at user place group is in PoC Standby state, when the user switches to the another one sub-district, need carry out the cell update (CELL_UPDATE) of CELL_PoC so, switching only needs the OICH channel of the Target cell after monitoring is switched just passable after finishing; After RNC receives CELL_UPDATE message, just think that user's Serving cell has switched to Target cell, at this moment RNC will notify and switch the cell change of preceding former sub-district about this user.
For situation one, if the PoC at user place group is in PoC Active state, so when listening user is prepared to switch to the another one sub-district, when receiving former sub-district OTCH channel, the OCCH channel that reads Target cell just can read the OTCH channel information of Target cell to obtain the information and the group information of target OTCH channel after switching is finished.UE can receive the FACH channel of two sub-districts simultaneously, and the information that receives is merged, to obtain extra gain (need the support of UE ability, promptly need UE can read the FACH channel of two sub-districts at synchronization).If UE thinks in the time of can switching to Target cell, to send CELL_UPDATE message at Target cell, after RNC receives CELL_UPDATE message, just think that user's Serving cell has switched to Target cell, at this moment RNC will notify the cell change of former sub-district about this user, but at this moment UE still can receive the FACH channel of former sub-district, merges.
For situation two, if the PoC group is in PoC Standby state, when the user switches to new sub-district, need carry out the CELL_UPDATE of CELL_POC, notice RNC group user has moved to a new Target cell, need in new sub-district, set up the information of this PoC group, comprise newly-built OICH channel and OCCH channel, and in system message, broadcast the information of OICH channel and OCCH channel.UE will keep the CELL_PoC state after the information that obtains OICH channel and OCCH channel, and will monitor the OICH channel.After RNC receives CELL_UPDATE message, just think that user's Serving cell has switched to Target cell, at this moment RNC will notify the cell change of former sub-district about this user.
For situation two, if the PoC group is in PoC Active state, after the signal that listening user measures Target cell reaches certain condition, the information of beginning receiving target sub-district, if there is not information in the discovery Target cell about this group, then in former sub-district, send a sub-district and change Indication message, carry the Target Cell Identifier (ID) that will switch in the message, require RNC in Target cell, to set up the PoC service of this group to RNC.RNC will set up the related service channel of this PoC group at Target cell after receiving message, and will broadcast correlated channels information (OICH channel and OCCH channel) in system message.In this process, UE will monitor the OCCH channel that obtains always from system message, if obtained the information of this group OTCH channel from the OCCH channel, will begin to receive business information.If UE thinks in the time of can switching to Target cell, to send CELL_UPDATE message at Target cell, after RNC receives CELL_UPDATE message, just think that user's Serving cell has switched to Target cell, at this moment RNC will notify the cell change of former sub-district about this user.
For spoken user, be the DCH channel owing to what adopt, so its switching is carried out according to the protocol specification of 3GPP fully.
When the group user is switched when a sub-district, if there have not been other group users in the sub-district, and after certain hour, there is not other group user to be linked in this sub-district, RNC will delete the resource that this sub-district is distributed for this group.If do not had PoC service to exist in this sub-district, will delete the OICH channel relevant, OCCH channel and OTCH channel so with PoC service.
In sum, the present invention uses the CTCH Common Traffic Channel of setting up between the network nodes at different levels to transmit PoC service information, therefore, only needs to transmit a business information between nodes at different levels, has reduced taking of network transmission resource.The present invention's eating dishes without rice or wine between Access Network and user terminal, newly-increased OTCH channel transmits PoC service information specially, newly-increased OICH channel radio group information updating indication, newly-increased OCCH channel transmission group information and OTCH channel information; The group user regularly monitors the OICH channel when the PoC standby condition, obtain this group information updating indication after, under PoC group state of activation, read the OCCH channel, obtain this group information and this group OTCH channel information, receive business information from this group OTCH channel; Adopt this mode, effectively reduce the time delay that user side obtains business information, satisfy the specific (special) requirements of PoC service QoS.
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 (16)
1, a kind of press-and-talk PoC service implementation method based on cellular network is characterized in that comprising:
PoC group user is registered in the PoC server, is shared as the service resources of this PoC set of dispense;
The group spoken user is eating dishes without rice or wine to transmit PoC service information to affiliated Radio Access Network RAN node by special uplink channel DCH; The RAN node sends the business information that receives to the PoC server by the CTCH Common Traffic Channel between the network nodes at different levels under the group spoken user;
The PoC server issues PoC service information by the CTCH Common Traffic Channel between the network nodes at different levels and listens RAN node under the user for the PoC winding; Winding is listened the affiliated RAN node of user to send the PoC service information that receives to winding by newly-increased PoC service channel OTCH and is listened the user.
2, the method for claim 1, it is characterized in that, the RAN node sends signaling data and transmission power control information by the special-purpose DCH down channel of eating dishes without rice or wine to described group of spoken user under the group spoken user, controls the power of the up DCH channel of described group of spoken user.
3, the method for claim 1 is characterized in that, described PoC group user is registered in the PoC server, is shared as the service resources of this PoC set of dispense, comprising:
After PoC organized first start user is registered to the PoC server, affiliated radio network controller (RNC) was set up this group example that is used for storage sets information and group user profile in this locality, and is this PoC set of dispense service resources; After the follow-up start user registration of this PoC group, affiliated RNC joins the follow-up start user of this PoC group in the group example of foundation, is shared as the service resources of this set of dispense.
4, method as claimed in claim 3 is characterized in that, winding is listened in the affiliated RAN node of user and also is provided with PoC indicating channel OICH and PoC control channel OCCH; Broadcasting group information updating indication in the described OICH channel, described OCCH Channel Transmission group information and OTCH channel information;
When the group user is in standby condition, monitor described OICH channel, obtain the group information updating indication; When PoC group is in state of activation, winding listen the user according to the group information updating on the described OICH channel indication obtain group information and OTCH channel information from described OCCH channel, receive business information from described OTCH channel.
5, method as claimed in claim 4 is characterized in that, described OICH channel is a physical channel; Described OICH channel information sends by system broadcast message; When the group user is in standby condition, specifying the moment to monitor described OICH channel.
6, method as claimed in claim 4 is characterized in that, the described OCCH channel information cycle sends; Winding listens the user to obtain described OCCH channel information by system message.
7, method as claimed in claim 4 is characterized in that, a described OTCH channel is set for each PoC group; A described OCCH channel is set in each sub-district; Described OTCH channel and described OCCH channel are logic channel, all are multiplexed on the forward access channel FACH.
8, method as claimed in claim 7 is characterized in that, described OTCH channel and described OCCH channel all are assigned with a Logic Channel Identifier, and the group user is the different logic channel of identification when receiving the FACH channel information.
9, method as claimed in claim 8 is characterized in that, after the group user receives the idle Indication message of right of speech that the PoC server sends, sends by Random Access Channel RACH and to rob the power request, listens the user to become the group spoken user by winding.
10, method as claimed in claim 9, it is characterized in that, if the priority of listening user is higher than current spoken user, can be under the situation of not receiving the idle Indication message of right of speech, send the power of robbing by the RACH channel and ask, listen the user to become the group spoken user by winding.
11, method as claimed in claim 10 is characterized in that, if the current state of PoC group is a state of activation, winding is listened the user to become the group spoken user to carry out PoC service and comprise following concrete steps:
The message part that A1, winding listen user terminal to insert by RACH carries the power of robbing and asks to send to affiliated RNC;
A2, winding are listened under the user RNC to transmit this power of robbing by the CTCH Common Traffic Channel between the network nodes at different levels to ask the PoC server; And second state of power requesting users state from first state transition of non-spoken user to spoken user will be initiated to rob;
A3, PoC server return robs the power success message, and transmission is robbed the power requesting users and become spoken user, sends business information by up DCH channel;
A4, PoC server stop to send the idle Indication message of described right of speech, and are seized message by the right of speech that current spoken user sign is carried in network nodes transmissions at different levels and listen the user to winding;
A5, winding listen the user to receive described business information from described OTCH channel.
12, method as claimed in claim 10 is characterized in that, if the current state of PoC group is a standby condition, winding is listened the user to become the group spoken user to carry out PoC service and comprise following concrete steps:
The message part that B1, winding listen user terminal to insert by RACH carries the described power of robbing and asks to send to affiliated RNC;
B2, winding are listened under the user RNC to transmit this power of robbing by the CTCH Common Traffic Channel between the network nodes at different levels to ask the PoC server; And with initiation rob power requesting users state from described first state transition to described second state;
B3, PoC server return robs the power success message, and transmission is robbed the power requesting users and become spoken user, sends business information by up DCH channel;
B4, PoC server stop to send the idle Indication message of described right of speech, and are seized message to RAN node under the group user by the right of speech that current spoken user sign is carried in network nodes transmissions at different levels;
The RAN node was broadcasted the group information updating indication under the user was listened in B5, winding in described OICH channel, and indication group user reads described OCCH channel information, simultaneously transmission group information and OTCH channel information on described OCCH channel;
B6, winding listen the user to obtain group information and OTCH channel information from described OCCH channel, receive business information from described OTCH channel.
13, as claim 11 or 12 described methods, it is characterized in that, RAN node under the PoC group that is in the PoC state of activation does not have spoken user in a period of time, the PoC server is organized to PoC by the CTCH Common Traffic Channel transmission group state transition order between the network nodes at different levels;
The RAN node issues group state transition order under the PoC group on described OTCH channel;
After the group spoken user receives described group of state transition order from described OTCH channel, oneself state is moved to described first state.
14, as the described method of the arbitrary claim of claim 4-12, it is characterized in that, listening the user need carry out the sub-district when the PoC winding switches, and when Target cell has this group PoC service, if the current PoC standby condition that is in of PoC group, after user's decision switches to Target cell, send cell update message at Target cell; RNC in the Target cell notifies the persistent district of former community user to change after receiving cell update message, replys user's cell update acknowledge message simultaneously; After the user receives the cell update acknowledge message, just think to have switched to Target cell, and the OICH channel of intercept target sub-district;
If the PoC group is in the PoC state of activation, in the OTCH channel service information of the user that request is switched former sub-district before receiving switching, the OCCH channel that reads Target cell obtains Target cell OTCH channel information and group information, receives business information from Target cell OTCH channel after switching is finished.
15, method as claimed in claim 14 is characterized in that, if the PoC group is in the PoC state of activation, described switching user reads the OTCH channel service information in former sub-district and the Target cell simultaneously, and the business information that receives is merged.
16, as the described method of the arbitrary claim of claim 4-12, it is characterized in that, listening the user need carry out the sub-district when the PoC winding switches, when Target cell does not have this group PoC service, if the PoC group is in the PoC standby condition, after the user switches to Target cell, in Target cell, set up OICH channel, OCCH channel and this group OTCH channel of handling PoC service, and monitor described OICH channel;
If the PoC group is in the PoC state of activation, the user that request is switched RNC under former sub-district sends the sub-district and changes Indication message, carries Target Cell Identifier in the message, and this group PoC service is set up in request in Target cell; After RNC receives that Indication message is changed in described sub-district under the former sub-district, in Target cell, set up OICH channel, OCCH channel and this group OTCH channel of handling PoC service, and broadcast the channel of setting up by system message; The user that request is switched monitors the OCCH channel that obtains from system message, obtain Target cell OTCH channel information and group information, receives business information from Target cell OTCH channel after switching is finished.
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| US10051440B2 (en) | 2015-09-22 | 2018-08-14 | Telefonaktiebolaget Lm Ericsson (Publ) | MBMS bearer handling in a group communications system |
Citations (4)
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|---|---|---|---|---|
| CN1571545A (en) * | 2004-04-28 | 2005-01-26 | 中兴通讯股份有限公司 | Push-to-talk (PTT) service system and service implementing method thereof |
| US20050124365A1 (en) * | 2003-12-05 | 2005-06-09 | Senaka Balasuriya | Floor control in multimedia push-to-talk |
| WO2005057868A1 (en) * | 2003-12-08 | 2005-06-23 | Kyocera Wireless Corp. | Directed flood of push-to-talk announce message |
| CN1662093A (en) * | 2003-12-05 | 2005-08-31 | 摩托罗拉公司 | Method and apparatus reducing PTT call setup delays |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050124365A1 (en) * | 2003-12-05 | 2005-06-09 | Senaka Balasuriya | Floor control in multimedia push-to-talk |
| CN1662093A (en) * | 2003-12-05 | 2005-08-31 | 摩托罗拉公司 | Method and apparatus reducing PTT call setup delays |
| WO2005057868A1 (en) * | 2003-12-08 | 2005-06-23 | Kyocera Wireless Corp. | Directed flood of push-to-talk announce message |
| CN1571545A (en) * | 2004-04-28 | 2005-01-26 | 中兴通讯股份有限公司 | Push-to-talk (PTT) service system and service implementing method thereof |
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