WO2009094920A1

WO2009094920A1 - Channel allocation method, generic access network controller and communication system

Info

Publication number: WO2009094920A1
Application number: PCT/CN2009/070127
Authority: WO
Inventors: Yang Zhao; Wulin Weng
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2008-01-29
Filing date: 2009-01-13
Publication date: 2009-08-06
Also published as: CN101500275B; CN101500275A

Abstract

A channel allocation method, Generic Access Network Controller (GANC) and a communication system are provided. The method comprises: receiving the first channel parameter information; sending MS the second channel parameter information used for setting up multi-instance service channel and starting to set up multi-instance service channel to MS. GANC includes the first controlling module used for receiving the first channel parameter information from the core network and the second controlling module used for sending MS the second channel parameter information used for setting up multi-instance service channel and starting to set up multi-instance service channel to MS according to the first channel parameter information. The system includes GANC and MS. Multiple CS channels, or CS channels and PS channels are synchronously allocated to different instances of the same service, therefore successful handoff from UTRAN to EGAN and QoS of user seamless roaming can be guaranteed.

Description

Channel allocation method, universal access network controller and communication system The present application claims to be submitted to the Chinese Patent Office on January 29, 2008, and the application number is 200810008449.7, and the invention name is "channel allocation method, universal access network controller and communication system". The priority of the Chinese Patent Application, the entire contents of which is incorporated herein by reference. TECHNICAL FIELD The present invention relates to the field of communications technologies, and in particular, to a channel allocation method, a universal access network controller, and a communication system.

Background technique

The Gener ic Acces s Ne twork (GAN) is an evolving wireless communication system. In this system, the mobile terminal can seamlessly switch between the local area network (LAN) and the wide area network (WAN), enabling users to transmit voice and data over a wide range of cellular networks and small-scale Wi-Fi systems. Wait for multimedia information to communicate.

The GAN enhancement (abbreviation: EGAN) technology introduces the Iu mode into the original GAN technology to enhance the packet domain and extend the GAN to the GAN A/Gb mode and the GAN Iu mode. Wherein, in the GAN A/Gb mode or the GAN Iu mode, when the mobile station (hereinafter referred to as MS) is used as the calling party, the existing GAN performs circuit switching (C i rcui t Swi tched, hereinafter referred to as CS) channel connection establishment. The process includes: the MS triggers the establishment of the CS channel; and after receiving the request accept message sent by the Gener ic Acces s Network Controller (GANC), the CS channel is established. When the MS is called, the CS channel connection establishment process includes: GANC paging MS; MS sends a paging response, and activates the CS channel. When the existing EGAN technology performs channel allocation, it only supports a certain service in GAN A/Gb mode. A CS channel is established; in the GAN Iu mode, only one CS channel or multiple PS channels are supported for a certain service.

In the existing Universal Mobile Telecommunications System (UMTS), two CS channels can be allocated for different instances of a certain service or a CS channel and a PS channel can be simultaneously allocated, for example, one Used to transmit audio data, one for transmitting video data. When switching from the Universal Tera Radio Access Network (UTRAN) to the IGU mode of EGAN, the existing EGAN only supports the establishment of one CS channel or multiple pieces for a certain service. The PS channel, therefore, cannot guarantee the quality of service in the service (referred to as: QoS). Summary of the invention

Embodiments of the present invention provide a channel allocation method, a universal access network controller, and a communication system, so as to simultaneously allocate multiple CS channels for different instances corresponding to the same service, or simultaneously allocate CS channels and PS channels, and ensure that The UTRAN to EGAN switch smoothly.

In order to solve the above problems, an embodiment of the present invention provides a channel allocation method, including:

Receiving first channel parameter information sent by the core network;

And transmitting, according to the first channel parameter information, second channel parameter information for establishing a multi-instance traffic channel to the mobile station MS, and initiating establishing a multi-instance service channel to the MS.

In order to solve the above problems, another embodiment of the present invention provides a GANC, which includes:

a first control module, configured to receive first channel parameter information sent by the core network; And a second control module, configured to send, according to the first channel parameter information, second channel parameter information used to establish a multi-instance traffic channel to the MS, and initiate establishment of a multi-instance service channel to the MS.

In order to solve the above problem, another embodiment of the present invention provides a communication system, including the above-described GANC and MS, wherein the MS includes: a first terminal module, configured to use the second channel parameter information from the GANC Establish a multi-instance traffic channel.

According to the technical solution of the embodiment of the present invention, in the GAN Iu mode and the GAN A/Gb mode, multiple CS channels are simultaneously allocated for different instances of the same service corresponding to different service types, or the CS channel and the PS channel are simultaneously allocated, thereby It ensures smooth handover from UTRAN to EGAN and ensures the quality of service when users roam seamlessly. DRAWINGS

1 is a flowchart of Embodiment 1 of a channel allocation method according to the present invention;

2A is a flowchart of Embodiment 2 of a channel allocation method according to the present invention;

2B is a signaling diagram of Embodiment 2 of a channel allocation method according to the present invention;

3A is a flowchart of Embodiment 3 of a channel allocation method according to the present invention;

FIG. 3B is a signaling diagram of Embodiment 3 of a channel allocation method according to the present invention; FIG.

4 is a schematic structural diagram of an embodiment of a communication system according to the present invention. detailed description

Method embodiment 1

This embodiment provides a channel allocation method, as shown in FIG. 1, including: Step 101: Receive first channel parameter information sent by a core network.

The first channel parameter information includes information about the type and quantity of the channel to be allocated.

Step 102: Send, according to the first channel parameter information, second channel parameter information used to establish a multi-instance traffic channel to the mobile station MS, and initiate establishment of a multi-instance service channel to the MS.

The second channel parameter information includes a channel identifier and domain information.

Step 1 03: Optionally, the MS establishes a multi-instance service channel according to the received second channel parameter information.

Specifically, multiple CS channels can be established at the same time; or CS channel and PS channel can be established at the same time.

Step 1 04, optionally, when a part of the channel fails to be established, the MS reports a successful channel identifier and/or a channel establishment failure reason, or fails to report the channel identification and/or channel establishment failure. the reason.

In this embodiment, in the GAN Iu mode and the GAN A/Gb mode, multiple CS channels can be simultaneously allocated for different instances of the same service corresponding to different service types, or the CS channel and the PS channel can be simultaneously allocated, thereby ensuring the slave UTRAN. Switch to EGAN to switch smoothly, and ensure the quality of service when users roam seamlessly.

Method embodiment 2

This embodiment provides a channel allocation method for simultaneously establishing a plurality of CS channels. FIG. 2A is a flowchart of the method; as shown in FIG. 2B is a signaling diagram of the method, the method includes:

Step 201: The MS establishes a communication connection with the GANC. For example, in the GAN Iu mode, the MS establishes a universal access-radio resource control (Gener ic Acces s-Radio Resource Cont ro l, GA-RRC) connection with the GANC. After the connection is established, the MS's main state is set to the connection state. (GA-RRC-CONNECTED), and set the sub-state to the CS channel por t Channe l (referred to as CTC) -INACTIVE state.

The sub-state is a CTC state added to support multi-instance allocation of multiple CS channels based on the main state being the connected state. specifically:

The CS channel inactive (referred to as CTC-INACTIVE) state is the initial state of the CS domain when the GA-RRC sublayer of the MS is in the connected state. When in this state, there is no CS channel in the CS domain, and the CS service data cannot be transmitted and received.

2) The CS channel activated (referred to as CTC-ACTIVE) state is another state of the CS domain when the GA-RRC sublayer of the MS is in the connected state. In this state, at least one active CS channel exists in the CS domain, and CS service data can be transmitted and received. When all CS channels are released, return to the CS channel inactive state.

The above state may also be set for each CS channel instance to become a sub-state of each CS channel, specifically:

1) The CS channel is not activated (referred to as CTC-INACTIVE) state. When it is in this state, the channel is not activated, and the channel cannot be used for transmitting and receiving CS service data between the mobile terminal and the GANC.

2) CS channel activated (referred to as: CTC-ACTIVE) state When the state is in this state, the channel is activated, and the channel can be used for transmitting and receiving CS service data between the mobile terminal and the GANC.

When communication between the mobile terminal and the GANC is required, a channel whose sub-state is CTC-ACTIVE is selected for communication.

Step 202: The MS performs a CS signaling interaction process with the core network through the GANC to complete processes such as authentication, encryption, and call setup. For example, the above signaling interaction process may be performed with a mobile switching center (Mob i Swi tching Center, MSC for short) in the core network. Step 203: The MSC in the core network selects the type and quantity of channels to be allocated according to the service request or paging response of the MS and its own system configuration.

Specifically, in this embodiment, the MSC may select one or more CS channels for different instances of each service according to service requirements.

Step 204: The MSC in the core network initiates a Radio Access Bearer (RAB) as an Ass ignment process.

Specifically, the MSC is carried in the RAB allocation request message and sent to the GANC according to one or more RAB identifiers (abbreviation: RAB ID) and a CN Transport Layer Address set according to the selection result in the step 203. Each of the RAB identifiers corresponds to one channel. Specifically, the RAB allocation request message may be sent by using an already established Signal Connection Control Part (SCCP) channel.

Step 205: The GANC searches for the corresponding channel parameter according to the RAB allocation request message, and sends the corresponding channel parameter to the MS. For example, it is carried in a channel activation (GA-RRC ACTIVATE CHA EL message) and sent to the MS.

Each channel parameter refers to related parameter information used to establish a channel, and may include one or more of the following information: a core network identifier, a channel mode, and a multi-rate codec configuration. The UDP port and IP address used for the upstream RTP, and the length of the voice sample.

Step 206: The MS establishes multiple CS channels according to the channel parameters in the received channel activation message and the GANC.

For example, after receiving the channel activation message, the MS sends a channel activation confirmation (GA-RRC ACTIVATE CHANNEL ACK) message to the GANC to respond if the activation request of all channels is accepted according to the service requirement or its own capability, and the message includes the activated channel. RAB logo, and downstream RTP The UDP port of the stream; the GANC replies with the GA-RRC ACTIVATE CHANNEL COMPLETE message to the MS to confirm the completion of the completion of the channel establishment process. After receiving the message, the MS sets the CTC sub-state to the CS channel activated state. After the channel is established, the GANC sends a RAB Assignment Response (RAB As Response) message to the MSC to confirm that the RAB establishment is complete.

If the MS decides to reject the activation request of the channel corresponding to some or all of the RAB identifiers according to the service requirement or its own capability, the MS may send a channel inactivity notification message to the GANC. For example, if the activation request of the channel corresponding to the partial RAB identifier is rejected, the channel inactivity notification message may be specifically a GA-RRC ACTIVATE CHANNEL ACK message, where the message includes the RAB ID of the activated channel, and may also include The RAB identifier of the channel that cannot be activated, optionally, may also include the reason for the failure. If the activation request of the channel corresponding to the entire RAB identifier is rejected, the channel inactivity notification message may be specifically a GA-RRC ACTIVATE CHANNEL NACK message or a channel activation failure message (GA-RRC ACTIVATE CHANNEL FAILURE) in the message. Contains the RAB ID of the channel that cannot be activated and the reason for the rejection.

In addition, in this case, similar to step 202, the MS performs a CS signaling interaction process with the MSC through the GANC to complete operations such as making a call connection.

Step 207: When the CTC substate of the MS is in the activated state of the CS channel, the MS and the MSC perform bidirectional transmission of CS voice or CS data through the GANC.

The creation of the CS and/or PS multi-channel instance can be performed not only when there is no traffic channel between the mobile terminal and the GANC, but also one or more CS and/or PS traffic channels between the mobile terminal and the GANC. Time to proceed. For example, when a mobile terminal and a GANC have established a CS channel for normal voice service; after the mobile terminal initiates a high-end service such as a video that needs to establish multiple bearers, the process of establishing multiple CS bearers may also be initiated. Through the method in this embodiment, in the GAN Iu mode, multiple CS channels are simultaneously allocated for different instances of the same service corresponding to different service types, thereby ensuring smooth handover from UTRAN to EGAN, thereby ensuring seamless user. Quality of service when roaming.

In addition, in the GAN A/Gb mode, the case of establishing multiple CS channel instances is similar to the above process. The MS and the GANC first establish a signaling channel, such as a GA-RC or a GA-CSR connection; after the connection is established, the main state of the MS It is set to the connection state (GA-CSR-CONNECTED); then multiple CS channels are established during one CS channel setup. After establishing at least one CS channel between the MS and the GANC, the CTC substate is set to the CS channel activated state.

If the method of setting the sub-state for each CS channel is used, the process of channel allocation is similar to the above process, except that it is slightly different when setting the state. The mobile terminal sets the sub-states of the channel instances that are successfully assigned to the activated sub-states respectively, and the channel instances that have failed to be assigned are set to the inactive sub-states, and subsequent communications are only performed on the activated channels.

Method embodiment 3

This embodiment provides a channel allocation method for simultaneously establishing CS and PS channels. FIG. 3A is a flowchart of the method. As shown in FIG. 3B, the signaling diagram of the method includes: Step 301: In the GAN Iu mode, the MS establishes a GA-RRC connection with the GANC. After the connection is established, the MS's main state is set to the connection state (GA-RRC-CONNECTED), and the sub-state is set to the dual transmission channel inactive (Dua l Transpor t Channe l (referred to as DTC) -INACTIVE) state.

The sub-state is a DTC state added in order to support simultaneous establishment of multi-instance allocation of CS channel and PS channel on the basis of the main state being the connection state. specifically:

1) The dual transport channel inactive (referred to as DTC-INACTIVE) state is the initial state of the CS domain and the PS domain when the GA-RRC sublayer of the MS is in the connected state. When in this state, there is no difference between MS and GANC There are CS channels and PS channels, and the CS service and PS service data cannot be transmitted and received at the same time.

2) The dual transport channel activated (referred to as DTC-ACTIVE) state is another state of the CS domain and the PS domain when the GA-RRC sublayer of the MS is in the connected state. In this state, at least one active CS channel exists in the CS domain, and CS service data can be transmitted and received; and at least one active PS channel exists in the PS domain, and PS service data can be transmitted and received. When there is no CS channel and PS channel at the same time, the dual transmission channel is inactive.

Step 302: The MS performs a CS or PS signaling interaction process with the core network through the GANC to complete processes such as authentication, power density, call setup, and packet data protocol (PDP) activation. .

Step 303: The core network selects a channel type and quantity to be allocated according to the service request of the MS or the paging response and the system configuration of the MS.

Specifically in this embodiment, the core network selects a CS channel and/or a PS channel for different instances of each service according to service requirements.

Step 304: The core network initiates a Radio Access Bearer (RAB) splitting process (Ass ignment) 3⁄4 process.

Specifically, the core network sets a plurality of RAB identifiers (abbreviation: RAB IDs) and a core transport layer address (CN Transport Layer Address) according to the result of the selection in step 303, and sends the information to the GANC in the RAB allocation request message. Each RAB identifier corresponds to a channel, and the core network identifier of each channel is set to distinguish whether the CS channel or the PS channel is requested. Specifically, the RAB allocation request message may be sent by using an already established Signal Connection Control Part (SCCP) channel.

Step 305: The GANC searches for the corresponding channel parameter according to the RAB allocation request message, and carries it in The channel is sent to the MS in the GA-RRC ACTIVATE CHANNEL message.

Each channel parameter refers to related parameter information used to establish a channel, and mainly includes one or more of the following information: core network domain identifier, channel mode, multi-rate codec configuration information (Mul t i-ra te codec Conf i gura t ion) , UDP port and IP address used for upstream RTP 、, voice sample length and other information. At this time, when a channel activation message is sent to the MS, there may be only a CS channel, only a PS channel, or both CS and PS channels between the MS and the GANC. The channel activation message may be a GA-RRC ACTIVATE CHANNEL message; or may be other types of messages dedicated to the simultaneous allocation of CS and PS channel conditions during handover.

Step 306: The MS establishes a CS channel and a PS channel according to the channel parameter in the received channel activation message and the GANC.

Specifically, after receiving the channel activation message, the MS, if it decides to accept the activation request of all channels according to the service requirement or its own capability, agrees to perform channel establishment, and sends a channel activation confirmation (GA-RRC ACTIVATE CHANNEL ACK) message to the GANC to respond. The message includes the UDP port of the downlink RTP stream; the GANC returns a GA-RRC ACTIVATE CHANNEL COMPLETE message to the MS to confirm the completion of the channel establishment process. After receiving the message, if there is a CS between the MS and the GANC And the channel of the PS domain, the sub-state is set to the dual transmission channel activated state. After the channel is established, the GANC sends a RAB As s i gnment Respond message to the core network to confirm that the RAB is established.

If the MS decides to reject the activation request of the channel corresponding to some or all of the RAB identifiers according to the service requirement or its own capability, the channel may be sent a notification message to the GANC. Specifically, if the activation request of the channel corresponding to the partial RAB identifier is rejected, the channel inactivity notification message may be specifically a GA-RRC ACTIVATE CHANNEL ACK message, and the message includes the activated message. The RAB ID of the channel may also contain the RAB identifier of the channel that cannot be activated and the reason for the failure. If the activation request of the channel corresponding to the entire RAB identifier is rejected, the channel inactivity notification message may be specifically a GA-RRC ACTIVATE CHANNEL NACK message or a channel activation failure message (GA-RRC ACTIVATE CHANNEL FAILURE) in the message. Contains the RAB ID of the channel that cannot be activated and the reason for the rejection.

In addition, at this time, similar to step 302, the MS performs a CS or PS signaling interaction process with the core network through the GANC to complete operations such as making a call connection.

Step 307: When the sub-state of the MS is in the activated state of the dual transport channel, the MS and the MSC in the core network or the serving GPRS support node (SGSN) perform bidirectional transmission of CS voice or PS data through the GANC.

It should be noted here that before the mobile terminal enters the activated state of the dual transport channel, there may be no traffic channel between the MS and the GANC, or there is a CS channel or a PS channel performing service data transmission in the CS domain or the PS domain, but At this time, CS and PS services are not simultaneously performed. The following describes the signaling flow when the MS needs to perform CS and PS domain service transmission simultaneously for the above three cases:

1) There is no service between the MS and the GANC, that is, no service channel is established, and the MS will send the service request information to the GANC, such as carrying a service request message in the GA-RRC INITIAL DIRECT TRANSFER message. The message contains domain information requesting to establish a channel, such as CS domain, PS domain, CS, and PS domain. After receiving the message, the GANC will establish a signaling channel or a traffic channel to the core network, and send the service request to the network element of the corresponding domain of the core network, such as MSC and SGSN;

2) The CS service is performed between the MS and the GANC, and the MS may send the service request information to the GANC, for example, the GA-RRC INITIAL DIRECT TRANSFER message carries the service request message, where the message includes the request establishment. PS domain information of the channel. GANC received the cancellation After the information, a signaling channel or a traffic channel to the core network is established, and the service request is sent to the network element SGSN of the domain corresponding to the core network;

3) The PS service is performed between the MS and the GANC, and the MS may send the service request information to the GANC, for example, the GA-RRC INITIAL DIRECT TRANSFER message carries the service request message, where the message includes the request establishment. CS domain information of the channel. After receiving the message, the GANC will establish a signaling channel or a traffic channel to the core network, and send the service request to the network element MSC of the corresponding domain of the core network.

Through the method in this embodiment, in the GAN Iu mode, the CS channel and the PS channel are simultaneously allocated for different instances of the same service corresponding to different service types, thereby ensuring smooth handover from UTRAN to EGAN, thereby ensuring that the user has no The quality of the business when sewing.

In addition, in the GAN A/Gb mode, the case of establishing the CS domain and the PS channel instance is similar to the above process. The MS and the GANC first establish a GA-CSR connection; after the connection is established, the MS's main state is set to the connection state (GA- CSR-CONNECTED); then at least one CS channel and at least one PS channel are simultaneously established in one channel establishment process. When the CS and PS channels exist simultaneously between the MS and the GANC, the DTC substate is set to the dual transport channel activated state.

System embodiment

This embodiment provides a communication system, as shown in FIG. 4, including GANC 10 and MS 20. Its working principle is as follows:

After the GANC 10 establishes a connection with the MS 20, after the first control module 11 of the GANC 10 receives the first channel parameter information sent by the core network, the second control module 12 of the GANC 10 sends the first channel parameter information to the MS 20 according to the first channel parameter information. The second channel parameter information used to establish the multi-instance traffic channel is initiated to establish a multi-instance service channel to the MS20; the first terminal module 21 in the MS 20 is based on The second channel parameter of GANCI O establishes a multi-instance traffic channel with GANCI O, for example, multiple CS channels or CS and PS channels can be established. In addition, the MS20 may further include a second terminal module 22, configured to report, to the GANC 10, a channel identifier and/or a channel establishment failure reason for establishing a successful channel, or establish a channel of the failed channel, when the partial channel establishment fails. Identification and/or reason for failure.

With the system in this embodiment, in the GAN Iu mode, multiple CS channels are simultaneously allocated for the same service corresponding to different instances of different service types, or the CS channel and the PS channel are simultaneously allocated, thereby ensuring handover from UTRAN to EG AN. Smooth handover ensures the quality of the service when users roam seamlessly. In addition, in the GAN A/Gb mode, the case of establishing multiple CS channels and establishing the CS domain and the PS channel is similar to the above process, and will not be described here.

Through the above description of the embodiments, those skilled in the art can clearly understand all or part of the steps of the method embodiments of the present invention, which may be implemented by hardware or by means of software plus a necessary general hardware platform. Based on such understanding, the technical solution of the present invention can be embodied in the form of a software product that can be stored in a non-volatile storage medium.

(may be a CD-ROM, a USB flash drive, a removable hard drive, etc.), including a number of instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention. All or part of the steps.

It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

Rights request

A channel allocation method, comprising:

Receiving first channel parameter information sent by the core network;

The channel allocation method according to claim 1, wherein the receiving the first channel parameter information sent by the core network comprises: receiving, by the core network, a first type and a quantity including an allocated channel Channel parameter information.

The channel allocation method according to claim 1, wherein the transmitting the second channel parameter information to the mobile station MS comprises: transmitting, to the mobile station MS, second channel parameter information including a channel identifier and domain information.

The channel allocation method according to claim 1 or 3, wherein the transmitting the second channel parameter information further comprises: the MS establishing a multi-instance service channel according to the received second channel parameter information.

The channel allocation method according to claim 4, wherein the establishing the multi-instance traffic channel comprises: establishing a plurality of circuit-switched CS channels at the same time.

The channel allocation method according to claim 5, wherein before the receiving the first channel parameter information, the method further comprises: setting a primary state of the MS to a connection state, and setting a CTC substate to a CS channel inactive state. .

The channel allocation method according to claim 6, wherein after the establishing the multi-instance service channel, the method further comprises: setting a CTC sub-state of the MS to an CS channel activated state.

8. The channel allocation method according to claim 4, wherein said establishing a multi-instance The traffic channel includes: simultaneously establishing a cs channel and a packet switched PS channel.

The channel allocation method according to claim 8, wherein before receiving the first channel parameter information, the method further comprises: setting a primary state of the MS to a connection state, and setting a DTC substate to a dual transmission channel inactive. status.

The channel allocation method according to claim 9, wherein after the establishing the multi-instance service channel, the method further comprises: setting a DTC sub-state of the MS to a dual-transport channel activated state.

The channel allocation method according to claim 4, wherein after the MS establishes the multi-instance service channel according to the second channel parameter information, the method further includes: the channel identifier of the channel on which the MS reports successful establishment and/or Or the cause of the channel establishment failure, or the channel identification of the failed channel and/or the reason for the channel establishment failure.

12. A universal access network controller, GANC, characterized by:

a first control module, configured to receive first channel parameter information sent by the core network;

And a second control module, configured to send, according to the first channel parameter information, second channel parameter information for establishing a multi-instance traffic channel to the MS, and initiate establishment of a multi-instance service channel to the MS.

A communication system, comprising: the GANC and the MS according to claim 12, wherein the MS comprises: a first terminal module, configured to establish, according to the second channel parameter information from the GANC Instance traffic channel.

The communication system according to claim 13, wherein the MS further comprises: a second terminal module, configured to report, to the GANC, a channel identifier of a successfully established channel when a part of the channel fails to be established / or channel establishment failure reason, or report the channel identification and/or channel establishment failure reason of the channel that failed to be established.