CN103428644B - Realize the resident method exhaled with group of colony terminal and UE - Google Patents

Abstract

The present invention relates to a method for realizing cluster terminal camping and group calling and UE. The method includes: UE obtains the cell where it resides through cell search, and opens BCH in the cell where it resides to read system information. The system message includes at least a predetermined system resource block. and scheduling information of the reserved system resource block; performing cell camping according to the reserved system resource block and the scheduling information of the reserved system resource block. The present invention not only enables the UE to successfully camp in the cell through system messages, but also does not need to establish an RRC connection during the group call service, and obtains the group call resource configuration message sent by the FACH according to the configuration information in the predetermined system resource block, and establishes Corresponding channel resources are used to carry out group call and called voice services, which shortens the time delay of UE cluster group calls, thereby improving user experience.

Description

Method and UE for Realizing Cluster Terminal Camping and Group Call

technical field

The present invention relates to the technical field of wireless communication, in particular to a method for realizing cluster terminal camping and group calling under the TD-SCDMA (TimeDivision-Synchronous Code Division Multiple Access) system and UE.

Background technique

The trunking communication service is a half-duplex two-way service that can realize one-to-many services. Its characteristic is that when the trunking terminal initiates a group call service, its voice information can be sent to each of the predefined trunking groups at the same time. members, and the business builds fast. Among them, the trunking service functions include group call, individual call, speaking right application, speaking right release, and speaking right preemption. The biggest feature of trunking communication is that the voice communication adopts PTT (Push To Talk, Push To Talk) mode to connect, and the called party can answer without picking up the phone, and the connection speed is relatively fast. Based on these characteristics, the trunking communication system is widely used in government agencies, public security fire protection, energy transportation, airport terminals, industrial and mining enterprises, military and exhibitions and other industries and occasions.

With the development of mobile communication technology, the trunking communication system will gradually change from the current GSM (Global System of Mobile Communication, Global System of Mobile communication) technology to one based on 3G (3rd-generation, third-generation mobile communication technology) or 4G (fourth-generation mobile communication technology) The system evolution of communication technologies such as mobile communication technology).

At present, with the establishment of the communication standard TD-SCDMA, TD standard networking and terminal equipment have emerged as the times require, and thus the TD trunking technology based on the TD-SCDMA protocol standard to realize the trunking service function has emerged. However, because the trunking terminals have strict requirements on time delay, the existing TD trunking technology cannot meet the time delay requirements during the group call process of the trunking terminals.

Contents of the invention

The main purpose of the present invention is to provide a method and UE for realizing cluster terminal camping and group calling, aiming at realizing cluster terminal cell camping and reducing the time delay in the process of cluster terminal group calling.

In order to achieve the above object, the present invention proposes a method for realizing cluster terminal camping and group calling, including:

The UE obtains the cell where it is camped on through cell search, and opens the BCH in the cell where it is camped on to read system information, where the system message includes at least a predetermined system resource block and scheduling information of the predetermined system resource block;

Perform cell camping according to the predetermined system resource block and the scheduling information of the predetermined system resource block.

Preferably, the step of the UE obtaining the cell to camp on through cell search includes:

The UE performs a cell search according to a predetermined frequency point or a full-band frequency scan to acquire a cell to camp on.

Preferably, the predetermined system resource block carries required configuration information corresponding to the cluster-specific FACH.

Preferably, after the step of performing cell camping according to the predetermined system resource block and the scheduling information of the predetermined system resource block, the step further includes:

Reading the configuration information in the predetermined system resource block according to the scheduling information, and saving it locally.

Preferably, after the step of reading the configuration information in the predetermined system resource block according to the scheduling information and storing it locally, the method further includes:

The UE performs location update and group information update;

Sending a caller setup request message to the network side through a random access channel, the caller setup request message carrying call-related parameters;

receiving the caller setup response message returned after the network side authenticates the UE and detects the conflict, the caller setup response message carries physical resource information configured by the network side for the UE;

According to the physical resource information configured on the network side, the voice service of the group call is performed.

Preferably, the UE performs location update and group information update

After the steps also include:

After the UE receives the paging message, compare the group identifier in the updated group information stored locally with the group identifier in the paging message, and determine whether the paging message is a paging for the UE ; if then

According to the configuration information in the predetermined system resource block, the group call resource configuration message sent periodically on the FACH is obtained, and corresponding channel resources are established to perform group call and called voice services.

Preferably, the step of UE updating group information includes:

The UE sends a group information update request message carrying IMSI information to the network side;

receiving a group information update response message carrying the group information of the UE returned by the network side.

The present invention also proposes a UE for realizing cluster terminal camping and group calling, including:

A system information acquisition module, configured to acquire a cell to reside on through cell search, open a BCH in the cell to read system information, and the system information includes at least a predetermined system resource block and scheduling information of the predetermined system resource block;

The camping module is configured to perform cell camping according to the predetermined system resource block and the scheduling information of the predetermined system resource block.

Preferably, the system information obtaining module is further configured to perform cell search and obtain a cell to reside on according to a predetermined frequency point or a full frequency band scan.

Preferably, the UE also includes:

A storage module, configured to read the configuration information in the predetermined system resource block according to the scheduling information, and save it locally.

Preferably, the UE also includes:

An update module, configured to perform location update and group information update on the UE;

A group call module, configured to send a caller establishment request message to the network side through a random access channel, the caller establishment request message carrying call-related parameters; receiving the network side to perform authentication and conflict detection on the UE The caller setup response message returned later, the caller setup response message carries the physical resource information configured by the network side for the UE; and the group call caller voice service is performed according to the physical resource information configured by the network side.

Preferably, the group paging module is further configured to compare the group identifier in the updated group information stored locally with the group identifier in the paging message after the UE receives the paging message, and determine Whether the paging message is a paging for the UE; if so, according to the configuration information in the predetermined system resource block, obtain the group call resource configuration message sent periodically on the FACH, establish corresponding channel resources, and perform group paging. It's called voice service.

Preferably, the update module is specifically configured to send a group information update request message carrying IMSI information to the network side; and receive a group information update response message carrying the UE group information returned by the network side.

The present invention proposes a method for realizing cluster terminal camping and group calling and the UE. The UE searches the cell, opens the BCH in the cell where it resides, and reads the system message including the scheduled system resource block and the scheduling information of the scheduled system resource block. The reserved system resource block carries the required configuration information corresponding to the cluster-specific FACH, and the UE successfully camps on the cell through this system message; in addition, during the group call service, the UE does not need to establish an RRC connection, and according to the reserved system resource block The configuration information obtains the group call resource configuration message sent by FACH, establishes corresponding channel resources, and performs group call and called voice services, thereby shortening the delay of UE group call and improving user experience.

Description of drawings

Fig. 1 is a schematic flow diagram of an embodiment of a method for realizing cluster terminal camping and group calling in the present invention;

FIG. 2 is a schematic flow diagram of another embodiment of the method for realizing cluster terminal camping and group calling in the present invention;

FIG. 3 is a schematic structural diagram of an embodiment of a UE implementing cluster terminal camping and group calling in the present invention;

Fig. 4 is a schematic structural diagram of another embodiment of the UE implementing trunking terminal camping and group calling according to the present invention.

In order to make the technical solution of the present invention clearer and clearer, it will be further described below in conjunction with the accompanying drawings.

detailed description

The solution of the embodiment of the present invention is mainly: configuring a predetermined system resource block carrying required configuration information corresponding to a cluster-specific FACH (Forward Access Channel, forward access channel) on the network side, and UE (user equipment, user equipment, User terminal) through cell search, open BCH (Broadcast Channel, broadcast channel) in the resident cell to read the system message including the scheduled system resource block and the scheduling information of the scheduled system resource block, and successfully camp on the cell through the system message ; In the group call service, the UE does not need to establish an RRC (Radio Resource Control, radio resource control protocol) connection. During the group call being called, the UE sends a calling establishment request message carrying all call-related parameters to the network side , to obtain the physical resource information configured by the network side for the UE, and perform group call calling voice services; during the group call calling process, the UE obtains the group call resource configuration message sent by the FACH according to the configuration information in the predetermined system resource block, and establishes Corresponding channel resources are used to carry out group call and called voice services, so as to shorten the time delay of UE cluster group calls, thereby improving user experience.

Considering that the trunking terminal has strict requirements on time delay, the present invention performs corresponding processing in the processes of cell residence and group call service establishment, so as to meet the needs of trunking group calls.

As shown in Figure 1, an embodiment of the present invention proposes a method for realizing cluster terminal camping and group calling, including:

Step S101, the UE obtains the cell where it is camped on through cell search, and opens the BCH in the cell where it is camped on to read system information. The system message includes at least the scheduled system resource blocks and the scheduling information of the scheduled system resource blocks;

On the network side, system information blocks (SIBs) are used to contain actual system messages, and in the prior art, there are 19 types of SIBs including SIB1 to SIB19. The scheduling information of the SIB is carried by MIB or SB. Among them, the system message is transmitted on the BCCH (Broadcast Control Channel), and then mapped to the BCH or FACH, and always matches the BCH or FACH transmission block size.

In order to enable the UE to successfully camp in the cell and reduce the delay in subsequent group call services, a new system information block is added on the network side of this embodiment, which is the reserved system resource block referred to in this embodiment, represented by SIB30. The SIB30 It carries all the required configuration information corresponding to the cluster-specific FACH.

The system message block SIB30 is broadcast in the MIB (main scheduling block) of the system message broadcast. Of course, it can also be broadcast in the scheduling block SB1 or SB2. Any kind of broadcast in a message dispatch block.

During the power-on process of the UE, it first searches for a cell according to the specified frequency point. If a cell is found, it will open the BCH in the cell to read system information and try to camp.

If the cell is not found at the specified frequency point, or the camping fails, perform a full-band frequency scan, and then perform a cell search according to the frequency scan results, and then read the system information in the order of the signal strength of the cell search from high to low, And try to camp on the searched cell.

Step S102, performing cell camping according to the predetermined system resource block and the scheduling information of the predetermined system resource block.

In the process of judging camping, SIB30 must be scheduled in the main scheduling block, or scheduling block SB1 or SB2, otherwise, it is considered that the UE is not suitable for camping in this cell, and the specific scheduling block on which SIB30 is scheduled depends on the network side Arranged according to certain rules, no matter which scheduling block it is, the UE should be able to accept and process the SIB30. The scheduling information of the SIB30 requires scheduling of the SIB30, which specifies the location and repetition period of the SIB30.

On the premise of judging that SIB30 is scheduled, the UE turns on the BCH to receive system messages, as the mandatory SIBs of the cell to camp on, including SIB1, SIB3, SIB5, SIB7 and SIB30. As mentioned above, the UE takes SIB30 as a mandatory camping condition, because it specifies all the information corresponding to the trunking-specific FACH channel. Without this information, the cell where the UE resides will not be able to perform trunking services normally.

After the UE receives the mandatory system message including SIB30, it can successfully camp on the cluster cell. If any of the SIBs is not received during the process of reading the system message, the cell cannot camp on, and the UE will try to camp on the cluster cell. One cell is left, and its judgment principle is the same as that of the previous cell.

In this embodiment, the UE searches for the cell, opens the BCH in the cell where it resides, and reads the system message including the reserved system resource block and the scheduling information of the reserved system resource block. The reserved system resource block carries the required configuration information corresponding to the cluster-specific FACH , the UE successfully camps on the cell through the system message, and at the same time creates a foundation for the subsequent group call service to shorten the time delay of the UE cluster group call.

As shown in FIG. 2, another embodiment of the present invention proposes a method for realizing cluster terminal camping and group calling. On the basis of the above embodiment, after the above step S102, it also includes:

Step S103, read the configuration information in the predetermined system resource block according to the scheduling information, and save it locally;

After the UE reads the system information from the BCH, the UE reads the specific content of the SIB30 according to the scheduling information and saves it locally, including: storing the configuration information of the cluster-specific SCCPCH (secondary public control physical channel), and storing the TFS of the cluster FACH And the corresponding TCCCH configuration information stores the "repetition period", "repetition length" and "Frame offset" information elements of the TCCCH. The repetition period indicates the sending period of the PTT GROUP PHYSICAL CHANNELCONFIG message carried on the TCCCH. The UE calculates the initial sending frame of the message by the following formula:

SFN mod repetition period=Frame offset mod repetition period;

The repetition length indicates the number of times the PTT GROUP PHYSICAL CHANNELCONFIG message is sent repeatedly in this period. If the repetition length is not configured, the default PTTGROUP PHYSICAL CHANNEL CONFIG is sent only once in a cycle; if the repetition length is configured as "2", it means that it is sent 2 times in a row, and so on for other configuration values. The Frame offset is to ensure that the UE knows that there is cluster service after receiving the paging message (PCH), and then can receive information on the cluster FACH in the fastest time without waiting for a cluster FACH cycle.

Step S104, the UE performs location update and group information update;

After the UE successfully camps in the cell, it first performs the registration process of location update. After the location update process is completed, the UE initiates the group information update process. This group information update process is to let the UE know from the network the cluster group to which it belongs. information, the network will change the information of the group to which the terminal belongs according to certain settings. Therefore, each time the UE is powered on and registered successfully, it will update the group information to obtain the latest group information.

Wherein, the location update process of the UE can adopt the functions in the original TD system. I won't go into details here.

For the update process of the UE group information, after the UE completes the location update after starting up, it must immediately initiate the update process of the group information. The specific process is as follows:

The UE sends a PTT information Update Request message (group information update request message) to the network side, and the message carries IMSI (International Mobile Subscriber Identification Number, International Mobile Subscriber Identification Number) information, which is used for the network to determine the group information to which the UE belongs, and the network receives After receiving the message, after making corresponding judgments and building the message, send the PTT information UpdateAccept message (group information update response message) to the UE, which carries the group information of the UE, so that the UE can know the current group and call for the subsequent group Create basic conditions for services, such as a UE may belong to multiple groups at the same time, when performing a group call service, the user can choose to initiate a call in a certain group.

Step S105, sending a caller setup request message to the network side through a random access channel, where the caller setup request message carries call-related parameters;

Step S106, receiving the caller setup response message returned after the network side authenticates the UE and detects the conflict, the caller setup response message carries the physical resource information configured by the network side for the UE;

Step S107, perform group calling and calling voice services according to the physical resource information configured on the network side.

The above steps S105 to S107 are the UE group call calling process. In order to shorten the delay as much as possible, this embodiment does not perform the RRC connection establishment process, but directly performs a group call establishment process to complete the signaling interaction between the UE and the network, and at the same time obtain the service Channel resources for group call voice calling process.

Specifically, for a terminal that is normally on standby, the calling process of its cluster group call is:

1. When the UE needs to make a group call, it sends a PTT Call Setup Request message through a random access channel. According to the requirement of quick access to group calls, UE should access within 800ms. Therefore, in order to improve the access speed, the RRC link building process is omitted on the air interface, and all the information in the Service Request and Setup messages in the ordinary call are carried in the message PTT Call Setup Request, among which the parameters related to the call are CN domain identity, caller identity (P-TMSI or IMSI), called number, QoS requirements, and call service type, etc.;

2. After receiving the group call caller setup request sent by the UE, the network side needs to perform authentication and conflict detection. After confirming that the user is allowed to access, the network side obtains the preconfigured physical resource information according to the group call service type. The PTT Call Setup Response message is brought to the UE on the FACH channel, and at the same time carries the service layer 2 configuration index in the SIB. After receiving this message, the UE performs related configuration and synchronization with the dedicated channel of NODE B (base station) according to the physical layer configuration instructions. ;

3. After completing the configuration and synchronization process, the UE returns a call establishment completion message on the uplink service dedicated channel;

4. The UE opens the voice channel, and the user can perform uplink transmission of voice information on the allocated uplink voice resource channel, so as to realize the voice service of the group call.

It can be seen from the above that, compared with the prior art, when the trunking UE initiates a group call service in this embodiment, the signaling interaction process steps are less, so the delay is also less, thereby meeting the delay requirement of the trunking service.

Further, when the UE performs the called service, after the above step S103, it also includes:

Step S108, when the UE receives the paging message, compare the group identifier in the updated group information saved locally with the group identifier in the paging message, and judge whether the paging message is a paging for the UE; if so, Then enter step S109; otherwise, end the process;

Step S109, according to the configuration information in the predetermined system resource block, obtain the group call resource configuration message sent periodically on the FACH, establish corresponding channel resources, and perform group call and called voice services.

The above step S108 and step S109 are the UE group call and called process. In order to shorten the delay as much as possible in this embodiment, after the UE receives the paging message from the network, the RRC connection establishment process is not performed. Its physical resources are obtained by reading the cluster FACH channel. The network periodically broadcasts physical channel configuration information on the cluster-specific FACH channel. After reading the physical channel configuration information, the UE configures the physical channel configuration information to the physical layer. , enter the listening state, and obtain voice information. For the UE that starts up later, it can also enter the listening state by monitoring the dedicated FACH channel of the trunking, which is called a late access group call.

Specifically, for a terminal that is normally on standby, the called process of its cluster group call is:

1. After the cluster UE receives the paging message, it compares the information element "Group identity" in the paging message with all the group identities saved by the UE. If one of them is the same, it indicates that it is the paging for the UE, and the UE responds accordingly. paging message;

2. The UE reads the cluster-specific FACH channel (the configuration is obtained from SIB30), obtains the group call resource configuration message sent periodically on the FACH channel, obtains the service and accompanying channel resource configuration from it, and establishes corresponding channel resources accordingly ;

3. The UE opens a voice channel, receives downlink voice information, and enters a listening state. In order to prevent voice information loss phenomenon, the above step 2 and step 3 operate in parallel.

In addition, for UEs that start up later, after successfully booting up and camping, they need to know whether there is a group call service of the group they belong to. Therefore, the UE needs to actively read the trunking dedicated FACH channel, because the messages on this channel are periodic. Send, so you can definitely read the status information of the group you belong to. If there is a service, you will actively access to obtain voice information.

As can be seen from the above analysis, after the called user of the trunking UE in this embodiment receives the paging, it interacts with the signaling of the network. There is only one process of receiving paging, and the UE can automatically enter the listening state through internal processing, and receive Group call voice information.

This embodiment not only enables the UE to successfully camp on the cell, but also does not need to establish an RRC connection during the group call service, and obtains the group call resource configuration message sent by the FACH according to the configuration information in the predetermined system resource block, and establishes the corresponding channel Resources, to perform group call and called voice services, thereby shortening the delay of UE cluster group calls, thereby improving user experience.

As shown in FIG. 3, an embodiment of the present invention proposes a UE for cluster terminal camping and group calling, including: a system message acquisition module 301 and a camping module 302, wherein:

The system information acquisition module 301 is configured to acquire the cell where the cell is parked, and open the BCH in the cell where the cell resides to read system messages. The system message includes at least a predetermined system resource block and scheduling information of the predetermined system resource block;

The camping module 302 is configured to perform cell camping according to a predetermined system resource block and scheduling information of the predetermined system resource block.

On the network side, system information blocks (SIBs) are used to contain actual system messages, and in the prior art, there are 19 types of SIBs including SIB1 to SIB19. The scheduling information of the SIB is carried by MIB or SB. Wherein, the system message is transmitted on the BCCH, and then mapped to the BCH (Broadcast Channel, broadcast channel) or FACH, and always matches the BCH or FACH transmission block size.

In order to enable the UE to successfully camp in the cell and reduce the delay in subsequent group call services, a new system information block is added on the network side of this embodiment, which is the reserved system resource block referred to in this embodiment, represented by SIB30. The SIB30 It carries all the required configuration information corresponding to the cluster-specific FACH.

The system message block SIB30 is broadcast in the MIB (main scheduling block) of the system message broadcast. Of course, it can also be broadcast in the scheduling block SB1 or SB2. Any kind of broadcast in a message dispatch block.

When the UE is powered on, the system information acquisition module 301 performs cell search according to the specified frequency point. If a cell is found, it opens the BCH in the cell to read system information, and the camping module 302 tries to camp on according to the read system information.

If the cell is not found at the specified frequency point, or if the camping fails, the system information acquisition module 301 will scan the entire frequency band, and then perform a cell search according to the result of the frequency scan, and then perform the cell search in the order of signal strength from high to low. After reading the system information, the camping module 302 tries to camp on the searched cell.

In the process of judging camping, SIB30 must be scheduled in the main scheduling block, or scheduling block SB1 or SB2, otherwise, it is considered that the UE is not suitable for camping in this cell, and the specific scheduling block on which SIB30 is scheduled depends on the network side Arranged according to certain rules, no matter which scheduling block it is, the UE should be able to accept and process the SIB30. The scheduling information of the SIB30 requires scheduling of the SIB30, which specifies the location and repetition period of the SIB30.

On the premise of judging that SIB30 is scheduled, the UE turns on the BCH to receive system messages, as the mandatory SIBs of the cell to camp on, including SIB1, SIB3, SIB5, SIB7 and SIB30. As mentioned above, the UE takes SIB30 as a mandatory camping condition, because it specifies all the information corresponding to the trunking-specific FACH channel. Without this information, the cell where the UE resides will not be able to perform trunking services normally.

After the UE receives the mandatory system message including SIB30, it can successfully camp on the cluster cell. If any of the SIBs is not received during the process of reading the system message, the cell cannot camp on, and the UE will try to camp on the cluster cell. One cell is left, and its judgment principle is the same as that of the previous cell.

In this embodiment, the UE searches for the cell, opens the BCH in the cell where it resides, and reads the system message including the reserved system resource block and the scheduling information of the reserved system resource block. The reserved system resource block carries the required configuration information corresponding to the cluster-specific FACH , the UE successfully camps on the cell through the system message, and at the same time creates a foundation for the subsequent group call service to shorten the time delay of the UE cluster group call.

As shown in FIG. 4 , another embodiment of the present invention proposes a UE for cluster terminal camping and group calling. On the basis of the above embodiments, it also includes: a storage module 303 , an update module 304 and a group call module 305 , in:

The storage module 303 is configured to read the configuration information in the predetermined system resource block according to the scheduling information, and store it locally.

An update module 304, configured to perform location update and group information update on the UE;

The group call module 305 is configured to send a caller establishment request message to the network side through a random access channel, the caller establishment request message carrying call-related parameters; receiving the network side to perform authentication and conflict on the UE A caller setup response message returned after detection, the caller setup response message carrying physical resource information configured by the network side for the UE; and performing a group call caller voice service according to the physical resource information configured by the network side.

When the UE performs the called service, the group call module 305 is further configured to combine the group identifier in the updated group information stored locally with the group ID in the paging message after the UE receives the paging message. Compare the identifiers to determine whether the paging message is a paging for the UE; if so, obtain the group call resource configuration message sent periodically on the FACH according to the configuration information in the predetermined system resource block, and establish corresponding channel resources , to perform the group call called voice service.

Specifically, in this embodiment, after the UE reads the system message from the BCH, the storage module 303 of the UE reads the specific content of the SIB30 according to the scheduling information and saves it locally, including: storing configuration information of the cluster-specific SCCPCH , storing the TFS of the cluster FACH and the configuration information of the corresponding TCCCH, and storing the "repetition period", "repetition length" and "Frameoffset" information elements of the TCCCH. The repetition period indicates the sending period of the PTT GROUP PHYSICALCHANNEL CONFIG message carried on the TCCCH. The UE calculates the initial sending frame of the message by the following formula:

SFN mod repetition period=Frame offset mod repetition period;

The repetition length indicates the number of times the PTT GROUP PHYSICAL CHANNELCONFIG message is sent repeatedly in this period. If the repetition length is not configured, the default PTTGROUP PHYSICAL CHANNEL CONFIG is sent only once in a cycle; if the repetition length is configured as "2", it means 2 consecutive sendings, and so on for other configuration values. The Frame offset is to ensure that the UE knows that there is cluster service after receiving the paging message (PCH), and then can receive information on the cluster FACH in the fastest time without waiting for a cluster FACH cycle.

After the UE successfully camps in the cell, the update module 304 first performs the registration process of location update. After the location update process is completed, the UE initiates the group information update process. This group information update process is to let the UE know from the network where it belongs For group information, the network will change the information of the group to which the terminal belongs according to certain settings. Therefore, each time the UE is powered on and registered successfully, it will update the group information to obtain the latest group information.

Wherein, the location update process of the UE can adopt the functions in the original TD system. I won't go into details here.

For the update process of the UE group information, after the UE completes the location update after starting up, it must immediately initiate the update process of the group information. The specific process is as follows:

The UE sends a PTT information Update Request message (group information update request message) to the network side, and the IMSI information is carried in the message, which is used for the network to judge the group information to which the UE belongs. After receiving the message, the network performs corresponding judgment and message formation Afterwards, send the PTT information UpdateAccept message (group information update response message) to the UE, which carries the group information of the UE, so that the UE can know the current group and create basic conditions for subsequent group call services. For example, one UE may simultaneously Belonging to multiple groups, the user can choose to initiate a call in a certain group when performing a group call service.

Corresponding to the UE group call calling process, in order to shorten the delay as much as possible in this embodiment, the RRC connection establishment process is not performed, the group call module 305 directly performs a group call establishment process, completes the signaling interaction between the UE and the network, and obtains traffic channel resources at the same time , to carry out the group call voice calling process.

Specifically, for a terminal that is normally on standby, the calling process of its cluster group call is:

1. When the UE needs to make a group call, it sends a PTT Call Setup Request message through a random access channel. According to the requirement of quick access to group calls, UE should access within 800ms. Therefore, in order to improve the access speed, the RRC link building process is omitted on the air interface, and all the information in the Service Request and Setup messages in the ordinary call are carried in the message PTT Call Setup Request, among which the parameters related to the call are CN domain identity, caller identity (P-TMSI or IMSI), called number, QoS requirements, and call service type, etc.;

2. After receiving the group call caller setup request sent by the UE, the network side needs to perform authentication and conflict detection. After confirming that the user is allowed to access, the network side obtains the preconfigured physical resource information according to the group call service type. The PTT Call Setup Response message is brought to the UE on the FACH channel, and at the same time carries the service layer 2 configuration index in the SIB. After receiving this message, the UE performs related configuration and synchronization process with the dedicated channel of NODE B according to the physical layer configuration instruction;

3. After completing the configuration and synchronization process, the UE returns a call establishment completion message on the uplink service dedicated channel;

4. The UE opens the voice channel, and the user can perform uplink transmission of voice information on the allocated uplink voice resource channel, so as to realize the voice service of the group call.

It can be seen from the above that, compared with the prior art, when the trunking UE initiates a group call service in this embodiment, the signaling interaction process steps are less, so the delay is also less, thereby meeting the delay requirement of the trunking service.

Corresponding to the called process of the UE group call, in order to shorten the delay as much as possible in this embodiment, after the group call module 305 of the UE receives the paging message from the network, the RRC connection establishment process is not performed. Its physical resources are obtained by reading the cluster FACH channel. The network periodically broadcasts physical channel configuration information on the cluster-specific FACH channel. After reading the physical channel configuration information, the UE configures the physical channel configuration information to the physical layer. , enter the listening state, and obtain voice information. For the UE that starts up later, it can also enter the listening state by monitoring the dedicated FACH channel of the trunking, which is called a late access group call.

Specifically, for a terminal that is normally on standby, the called process of its cluster group call is:

1. After the cluster UE receives the paging message, it compares the information element "Group identity" in the paging message with all the group identities saved by the UE. If one of them is the same, it indicates that it is the paging for the UE, and the UE responds accordingly. paging message;

2. The UE reads the cluster-specific FACH channel (the configuration is obtained from SIB30), obtains the group call resource configuration message sent periodically on the FACH channel, obtains the service and accompanying channel resource configuration from it, and establishes corresponding channel resources accordingly ;

3. The UE opens a voice channel, receives downlink voice information, and enters a listening state. In order to prevent voice information loss phenomenon, the above step 2 and step 3 operate in parallel.

In addition, for UEs that start up later, after successfully booting up and camping, they need to know whether there is a group call service of the group they belong to. Therefore, the UE needs to actively read the trunking dedicated FACH channel, because the messages on this channel are periodic. Send, so you can definitely read the status information of the group you belong to. If there is a service, you will actively access to obtain voice information.

As can be seen from the above analysis, after the called user of the trunking UE in this embodiment receives the paging, it interacts with the signaling of the network. There is only one process of receiving paging, and the UE can automatically enter the listening state through internal processing, and receive Group call voice information.

The embodiment of the present invention realizes the cluster terminal camping and group call method and the UE. The UE searches the cell, opens the BCH in the cell where it resides, and reads the system message including the reserved system resource block and the scheduling information of the reserved system resource block. The system resource block carries the required configuration information corresponding to the cluster-specific FACH, and the UE successfully camps on the cell through this system message; in addition, during the group call service, the UE does not need to establish an RRC connection, and according to the configuration in the predetermined system resource block The information acquires the group call resource configuration message sent by the FACH, establishes corresponding channel resources, and performs group call and called voice services, thereby shortening the delay of the UE cluster group call, thereby improving user experience.

The above is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or process transformation made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technical fields , are all included in the scope of patent protection of the present invention in the same way.

Claims (10)

1. A method for realizing cluster terminal camping and group calling, characterized in that, comprising: The user terminal UE acquires the cell it is camping on through cell search, and opens a broadcast channel BCH in the cell to read the system message, the system message includes at least the reserved system resource block and the scheduling information of the reserved system resource block, the reserved system resource block The system resource block carries the required configuration information corresponding to the cluster-specific forward access channel FACH; performing cell camping according to the predetermined system resource block and the scheduling information of the predetermined system resource block; The UE performs location update and group information update; Sending a caller setup request message to the network side through a random access channel, the caller setup request message carrying call-related parameters; receiving the caller setup response message returned after the network side authenticates the UE and detects the conflict, the caller setup response message carries physical resource information configured by the network side for the UE; According to the physical resource information configured on the network side, the voice service of the group call is performed. 2. The method according to claim 1, wherein the step of the UE obtaining a cell to camp on through cell search comprises: The UE performs a cell search according to a predetermined frequency point or a full-band frequency scan to acquire a cell to camp on. 3. The method according to claim 2, further comprising: Reading the configuration information in the predetermined system resource block according to the scheduling information, and saving it locally. 4. The method according to claim 3, further comprising: After the UE receives the paging message, compare the group identifier in the updated group information stored locally with the group identifier in the paging message, and determine whether the paging message is a paging for the UE ; if then According to the configuration information in the predetermined system resource block, the group call resource configuration message sent periodically on the FACH is obtained, and corresponding channel resources are established to perform group call and called voice services. 5. The method according to claim 3 or 4, wherein the step of updating group information of the UE comprises: The UE sends a group information update request message carrying the International Mobile Subscriber Identity (IMSI) information to the network side; receiving a group information update response message carrying the group information of the UE returned by the network side. 6. A UE for realizing cluster terminal camping and group calling, characterized in that it comprises: A system information acquisition module, configured to acquire a cell to reside on through cell search, open a BCH in the cell to read a system message, the system message includes at least a predetermined system resource block and scheduling information of the predetermined system resource block, the The predetermined system resource block carries required configuration information corresponding to the cluster-specific forward access channel FACH; A camping module, configured to camp on a cell according to the predetermined system resource block and the scheduling information of the predetermined system resource block; An update module, configured to perform location update and group information update on the UE; A group call module, configured to send a caller establishment request message to the network side through a random access channel, the caller establishment request message carrying call-related parameters; receiving the network side to perform authentication and conflict detection on the UE The caller setup response message returned later, the caller setup response message carries the physical resource information configured by the network side for the UE; and the group call caller voice service is performed according to the physical resource information configured by the network side. 7 . The UE according to claim 6 , wherein the system information obtaining module is further configured to perform cell search according to predetermined frequency point or full frequency band scanning to obtain a cell to reside on. 8 . 8. The UE according to claim 7, further comprising: A storage module, configured to read the configuration information in the predetermined system resource block according to the scheduling information, and save it locally. 9. The UE according to claim 8, characterized in that, The group paging module is further configured to compare the group identifier in the updated group information stored locally with the group identifier in the paging message after the UE receives the paging message, and determine whether the paging message Whether the paging message is a paging for the UE; if so, according to the configuration information in the predetermined system resource block, obtain the group call resource configuration message periodically sent on the FACH, establish corresponding channel resources, and perform group call and called voice services . 10. The UE according to claim 8 or 9, characterized in that, The updating module is specifically configured to send a group information update request message carrying IMSI information to the network side; and receive a group information update response message carrying the UE group information returned by the network side.