WO2011035662A1

WO2011035662A1 - Method and device for multicast resource management

Info

Publication number: WO2011035662A1
Application number: PCT/CN2010/076079
Authority: WO
Inventors: 成超文
Original assignee: 中兴通讯股份有限公司
Priority date: 2009-09-24
Filing date: 2010-08-17
Publication date: 2011-03-31
Also published as: CN102035792A

Abstract

A method for multicast resource management is disclosed by the present invention, and the method includes that a Transport Resource Control Function Entity (TRC-FE) in a transport node and a top-tire TRC-FE perform multicast aggregate resource management for access line according to an aggregate resource profile object which describes aggregate resources, while the aggregate resource profile object is included in the Resource Connection Initiation Protocol (RCIP) message, which is interactive between the TRC-FE in the transport node and the top-tire TRC-FE. A device for multicast resource management is also disclosed by the present invention, and the device includes a setting unit, used for setting aggregate resource profile object, which describes aggregate resources, in the RCIP message, which is interactive between the TRC-FE in the transport node and the top-tire TRC-FE, and a management unit, used for performing multicast aggregate resource management for access line according to the aggregate resource profile object. In the invention, the aggregate resource profile object is redefined to carry the multicast resource related information, and the multicast resource management can be realized by using the aggregate resource profile object. Therefore, the resource admission control of the multicast service is realized, and the application scene of the RCIP is extended.

Description

Method and device for multicast resource management

The present invention relates to a technology for implementing multicast resource management by interacting between a Transport Control Function Entity (RCC) based on a Resource Connection Initiation Protocol (RCIP), and more particularly to a multicast Method and device for resource management. Background technique

Resource admission control is a new concept introduced in the Next Generation Network (NGN). Its functional layer is located between the service control layer and the bearer transport layer. Through the resource admission control technology, the specific details of the transmission network are shielded from the service layer upwards, and the service control and transmission functions are separated, the resource usage of the transmission network is perceived downward, and the transmission is ensured correctly and correctly through admission control and resource control. Network resources, thus ensuring the quality of service of the service, and preventing the phenomenon of bandwidth and business theft.

The International Telecommunication Union (ITU) defines the resource access control function (RACF) entity to be responsible for its evolution. Figure 1 shows the network architecture of the existing resource admission control function. As shown in Figure 1, the RACF entity includes the following network elements:

The Policy Decision Functional Entity (PD-FE) is based on the network policy rules, the service information provided by the service control layer, the transport layer subscription information provided by the network attachment function, and the resource admission decision result provided by the transmission control function. The final decision on resource acceptance control.

The Transmission Control Function (TRC-FE) is not related to the service, but is related to the transmission technology. The TRC-FE entity is responsible for collecting and maintaining the topology and resource status information of the transport network, based on topology, connectivity, The availability of network and node resources, and the use of control resources based on the transport layer subscription information in the access network, implement admission control on the transport network.

The transport layer consists of a Policy Enforcement Functional Entity (PE-FE) and a Transport Resource Enforcement Functional Entit (TRE-FE).

The PE-FE is a packet-to-packet gateway. It can be located between the user equipment and the access network, between the access network and the core network, or between different carrier networks. It supports dynamic quality of service (QoS). Key node for control, port address translation control. The TRE-FE performs the transmission resource policy rule indicated by the TRC-FE. The Customer Premises Network (CPN) is the customer premises network and is the network where the current user resides.

Service control function entities include, for example, the IP Multimedia Subsystem (IMS).

The Network Attachment Control Function (NACF) entity is responsible for providing information such as user subscription data.

In the transmission network, there may be multiple transmission control function entities coordinating the scenario responsible for user resource admission control, for example, the transmission control function entity that is co-located with the transmission entity at the transmission node, through the R interface (Resource control protocol at the t Interface ) Interact with the upper layer TRC-FE to implement multicast resource management. This can push the multicast replication function to the access point and save a lot of network resources. Based on this requirement, the ITU defined the RCIP protocol and implemented the interaction by initiating the protocol between the two TRC-FEs.

Figure 2 is a schematic diagram of multicast resource admission control after the transmission control function entity is decentralized. As shown in Figure 2, the SCF is a service control function, and performs signaling plane interaction with the customer premises equipment CPE. The transport node includes There are co-located transmission control functions (co-located TRC-FE), multicast control function (MTCF, Multicast Transport Control Function) and multicast replication function (MRF). Top-Tire TRC-FE and transmission The node-consolidated transmission control functions interact with each other through the Rp interface using the RCIP protocol.

In the current RCIP, only the flow information and the flow traffic information when the unicast service is requested, where the flow information is used to identify the IP data flow, and the description information included therein As shown in Table 1:

Table 1

The flow traffic information is used to describe the service quality requirements of the unicast service flow object, and the description information contained in it is shown in Table 2:

Table 2

For the multicast resource management that the RACF entity is responsible for, the RACF entity needs to initially allocate information such as the bandwidth occupied by the access network multicast service. At the same time, when the multicast resources of the subsequent access lines are insufficient, the access line can trigger the adjustment of the occupied bandwidth share of the multicast service. In the current RCIP, this part of the access line assignment multicast resource description information cannot be reflected in the protocol. The protocol needs to be extended to support this decentralized multicast resource management requirement. Summary of the invention

In view of this, the main object of the present invention is to provide a method for multicast resource management, which can Realize multicast resource admission control when TRC-FE is decentralized.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

A method for multicast resource management, including:

The transport control function entity and the top-level transport control function entity in the transport node perform resource management according to the aggregate resource library object describing the aggregate resource included in the initial protocol message according to the resource connection of the interaction node.

Preferably, the aggregation resource library object includes at least the bandwidth information of the allocated aggregation resource, and the identifier of the physical access to which the user equipment is connected, the identifier of the logical access to which the user equipment is attached, or the identifier of the physical resource in the aggregation network. The identifier of the logical resource in the aggregation network.

Preferably, the aggregate resource library object further includes one or more of a direction, a service quality type, and traffic description information of the assigned aggregate resource.

Preferably, performing resource management includes:

After receiving the RCIP aggregation resource allocation request of the top-level transmission control function entity, or after receiving the response of the top-level transmission control function entity to the RCIP aggregation resource adjustment request of the transmission control function entity in the transmission node, The transmission control function entity in the transport node performs installation of the access line multicast aggregation resource share according to the RCIP request or the aggregate resource library object in the RCIP response.

A device for managing multicast resources, including:

a setting unit, configured to set an aggregate resource library object describing the aggregate resource in an RCIP message that the transport control function entity in the transit node interacts with the top-level transport control function entity;

a management unit, configured to perform resource management according to the aggregate resource library object.

Preferably, the aggregate resource library object further includes the direction of the assigned aggregate resource, and the service One or more of the quality type and traffic description information.

Preferably, the management unit comprises:

a receiving subunit, configured to receive an RCIP aggregation resource allocation request of the top layer transmission control function entity, or receive a response of the top layer transmission control function entity to an RCIP aggregation resource adjustment request of a transmission control function entity in the transmission node; as well as

a installing subunit, configured to: after the receiving subunit receives the RCIP request or the RCIP response, perform an access line multicast aggregation resource share according to the RCIP request or the aggregate resource library object in the RCIP response installation.

In the present invention, when the TRC-FE is decentralized to the lower layer network element such as the transmission node, since the existing RCIP does not involve the management of the multicast resource when the TRC-FE is decentralized, the lower layer network element such as the transmission node cannot be implemented. Multicast resource admission control of multicast services, which undoubtedly constrains the current network support for multicast services, and does not optimize network resources. The present invention extends the RCIP by redefining the aggregation resource library object and carrying the related information of the multicast resource, and realizing the management of the multicast resource through the aggregation resource library object, thereby realizing the resource admission control of the multicast service, thereby expanding the RCIP. Application scenario. The technical solution of the invention is simple and practical, and the implementation cost is low. DRAWINGS

1 is a flowchart of a method for registering users in an access gateway control function entity according to the present invention; FIG. 2 is a schematic diagram of multicast resource admission control after a transport control function entity is decentralized; FIG. 3 is a request for adjustment of a top layer transmission control function entity according to the present invention; Flowchart of access line multicast aggregation resource bandwidth;

4 is a flowchart of a request for an uplink node transmission control function entity to adjust allocation of a multicast aggregation resource when a user requests a multicast service according to the present invention;

FIG. 5 is a schematic structural diagram of a device for managing multicast resources according to the present invention. detailed description

The basic idea of the present invention is: When the TRC-FE is decentralized to a lower layer network element such as a transmission node, since the existing RCIP does not involve multicast resource management when the TRC-FE is decentralized, at this time, the lower layer network element such as the transmission node Multicast services will not be able to implement multicast resource admission control for multicast services. This undoubtedly constrains the current network's support for multicast services and does not optimize network resources. The invention re-defines the aggregation resource library object and carries related information of the multicast resource, and the aggregation resource resource can realize the management of the multicast resource and the resource admission control of the multicast service, thereby expanding the application of the RCIP. Scenes. The technical solution of the invention realizes the single and practical, and the realization cost is low.

The present invention will be further described in detail below with reference to the accompanying drawings.

FIG. 3 is a flowchart of a request for adjusting a bandwidth of an access line aggregation resource by a top-level transmission control function entity according to the present invention. As shown in FIG. 3, the method includes the following steps:

Step 301: The top-level transport control function entity (TRC-FE) triggers adjustment of the share of the aggregated resources allocated for the multicast service on the access line. The adjustment of the multicast aggregation resource share of the access line triggered by the top-level TRC-FE, for example, may be based on the adjustment of the aggregated resource share initiated by the network policy, or actively adjust the multicast aggregation of the access line when the available resources of the current network are insufficient. Resource share.

Step 302: The top-level TRC-FE sends an RCIP multicast aggregation resource allocation request message to the rendezvous transmission control function entity (TRC-FE) of the transit node. The multicast aggregation resource allocation request message includes the complete aggregate resource profile object information, including the parameters included in the resource profile. 4 Description Table 3: Parameter Description

- Direction (optional) is used to describe the direction of the assigned aggregated resource

- Physical access identifier (optional) The physical ID of the access line to which the user is connected - Logical access identifier (optional) Logical identifier of the access line to which the user is attached

- physical aggregation identifier (optional) identifier of the physical resource in the aggregation network

- logical aggregation identifier (optional) The identifier of the logical resource in the aggregation network

- Bandwidth Description of the bandwidth of the assigned resource

- QoS type (optional) QoS type

- Traffic description (optional) Traffic description information

table 3

The items that are not identified as "optional" in the resource profile are mandatory information. In addition to the above mandatory parameters, the aggregate resource profile must also include the physical access identifier/logical access identifier, or physical aggregation identifier/logic. Convergence logo.

Step 303: The concatenated transmission control function entity installs the multicast resource according to the bandwidth allocation indication in the CIP multicast aggregation resource allocation request message. For example, after receiving the RCIP aggregation resource allocation request message, the joint transmission control function entity obtains the parameter physical access identifier Physical Access ID 1 and the allocated bandwidth bandwidth 100M included in the aggregate resource profile.

The combined transmission control function entity allocates a multicast aggregation bandwidth of 100M for the access line Physical Access ID 1.

Step 304: The splicing transmission control function entity responds with an RCIP response message including the result of the multicast aggregation resource allocation.

FIG. 4 is a flowchart of a request for an uplink node transmission control function entity to adjust allocation of a multicast aggregation resource when a user requests a multicast service according to the present invention. As shown in FIG. 4, the method includes the following steps:

Step 401: The user premises equipment joins the multicast message such as the request by the Internet Group Management Protocol (IGMP) to the transmission node to clear the multicast service.

Step 402: A multicast transmission control function entity (MTCF) located at the transmitting node processes the multicast request message. If the channel requested by the user is not available at the transmitting node, the multicast transmission control function entity performs a coordinated transmission control function to the transmitting node. The entity (TRC-FE) requests resource admission control. Step 403: The coordinated transmission control function entity performs resource admission control. If the multicast service resource budget needs to be adjusted, the multicast aggregation resource adjustment request message is sent to the top-level transmission control function entity (TRC-FE), and the multicast aggregation resource adjustment is performed. The request message contains the complete aggregate resource profile object information. The description of the parameters included in the resource profile is exactly the same as that shown in Table 3. The items that are not identified as "optional" are the information that must be included, except the above mandatory items. The aggregate resource profile must also contain the physical access identifier/series access identifier or the physical aggregation identifier/logical aggregation identifier.

Step 404: The top-level transmission control function entity responds to the multicast aggregation resource adjustment request, and authorizes the multicast aggregation resource adjustment, where the RCIP response message of the detailed multicast aggregation resource allocation result is included, that is, the RCIP response message includes the table shown in Table 3. For the specific information contained in the attribute information, refer to the related description above, and details are not described herein again.

For example, after receiving the multicast aggregation resource adjustment request message, the top-level transmission control function entity obtains the parameters Physical Access ID 1 and bandwidth 100M included in the aggregate resource profile. If the top-level transport control function entity agrees to the adjustment, the response result will include the allocation result, where the aggregate resource object contains the parameters Physical Access ID 1, bandwidth 100M. If the adjustment is not agreed, the multicast aggregation resource adjustment failure message is returned, and the current process ends.

Step 405: The concatenated transmission control function entity installs a multicast resource according to the multicast aggregation resource allocation indication in the RCIP response message. For example, after receiving the RCIP allocation bandwidth adjustment response message as described above, the splicing transmission control function entity allocates a multicast aggregation bandwidth of 100M to the access line Physical Access ID 1.

Step 406: The accommodating transmission control function entity responds to the admission control request of the multicast transmission control function.

Step 407: The multicast transmission control function responds to the user multicast service request.

FIG. 5 is a schematic structural diagram of a device for managing multicast resources according to the present invention, as shown in FIG. 5, The device for managing the multicast resource of the present invention includes a setting unit 50 and a management unit 51, wherein the setting unit 50 is configured to set an aggregation describing the aggregation resource in the RCIP message that the transmission control function entity in the transmission node interacts with the top layer transmission control function entity The resource library object; the management unit 51 is configured to perform access line multicast aggregation resource management according to the aggregate resource library object. The aggregation resource library object includes at least the bandwidth information of the allocated resource, and the identifier of the physical access to which the user equipment is connected, the identifier of the logical access to which the user equipment is attached, or the identifier/logical resource of the physical resource in the aggregation network. The identity in the aggregation network. The aggregate resource library object further includes one or more of the direction of the assigned aggregate resource, the quality of service type, and the traffic description information.

As shown in FIG. 5, the management unit 51 of the present invention includes a receiving subunit 510 and a mounting subunit 511, wherein the receiving subunit 510 is configured to receive an RCIP request for multicast aggregation resource allocation of the top layer transmission control function entity, or Receiving an RCIP response of the top layer transmission control function entity to a multicast aggregation resource adjustment request of a transmission control function entity in the transmission node; the installation subunit 511 is configured to receive the RCIP request or the After the RCIP response, the installation of the access line multicast aggregation resource shares is performed according to the RCIP request or the aggregate resource library object in the RCIP response.

It should be understood by those skilled in the art that the device for multicast resource management shown in FIG. 5 is designed to implement the foregoing method for managing multicast resources. For the functions of each processing unit in the device shown in FIG. 5, reference may be made to FIG. 3 described above. It is understood from the related description in FIG. 4 that the functions of each processing unit and sub-unit can be implemented by a program running on a processor, or can be realized by a specific logic circuit.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

Claim

A multicast resource management method, the method comprising: the transport control function entity in the transport node and the top-level transport control function entity according to the resource connection of the interaction, the description of the aggregated resource included in the initial protocol message Aggregate repository objects and perform resource management.

The method according to claim 1, wherein the aggregate resource library object includes at least bandwidth information of the allocated aggregation resource, and an identifier of the physical access to which the user equipment is connected/logical access to which the user equipment is attached. The identifier or the identifier of the physical resource in the aggregation network in the aggregation network.

The method according to claim 2, wherein the aggregate resource library object further includes at least one of a direction of the assigned aggregate resource, a quality of service type, and traffic description information.

The method according to claim 1, wherein the performing resource management is specifically: after receiving the RCIP aggregation resource allocation request of the top-level transmission control function entity, or receiving the top-level transmission control function entity pair After the response of the RCIP aggregation resource adjustment request of the transmission control function entity in the transmission node, the transmission control function entity in the transmission node performs an access line according to the RCIP request or the aggregate resource library object in the RCIP response. Installation of multicast aggregation resource shares.

A device for managing multicast resources, characterized in that: the device includes a setting unit and a management unit;

a setting unit, configured to set an aggregate resource library object describing an aggregate resource in an RCIP message that is used by the transport control function entity in the transit node to interact with the top-level transport control function entity;

The device according to claim 5, wherein the aggregate resource library object includes at least bandwidth information of the allocated aggregate resource, and a physical access target connected by the user equipment. The identifier of the logical access to which the user device is attached or the identifier of the physical resource in the aggregation network in the aggregation network.

The apparatus according to claim 6, wherein the aggregate resource library object further includes at least one of a direction of the assigned aggregate resource, a quality of service type, and traffic description information.

The device according to claim 5, wherein the management unit further comprises a receiving subunit and a mounting subunit; wherein

a receiving subunit, configured to receive an RCIP aggregation resource allocation request of the top layer transmission control function entity, or receive a response of the top layer transmission control function entity to an RCIP aggregation resource adjustment request of a transmission control function entity in the transmission node;