CN108234357B - Multicast traffic distribution method and system - Google Patents
Multicast traffic distribution method and system Download PDFInfo
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- CN108234357B CN108234357B CN201611163831.6A CN201611163831A CN108234357B CN 108234357 B CN108234357 B CN 108234357B CN 201611163831 A CN201611163831 A CN 201611163831A CN 108234357 B CN108234357 B CN 108234357B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
- H04L47/78—Architectures of resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
- H04L47/80—Actions related to the user profile or the type of traffic
- H04L47/806—Broadcast or multicast traffic
Abstract
The invention provides a multicast flow distribution method and a system, wherein a mapping relation is established between a multicast group and a multicast channel binding group; when customer end equipment CPE under the CM joins in a multicast group, a multicast session is established, and multicast flow of the multicast group is bound to a channel corresponding to a multicast channel binding group, so that multicast bandwidth is distributed, and the utilization rate of system bandwidth is improved.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a multicast traffic distribution method and system.
Background
When a CPE (Customer Premise Equipment) joins a multicast session, if an existing multicast session reaches a newly joined CM (Cable Modem), that is, the CM is online on a channel where the existing multicast session exists, the system uses the same DSID configuration for the CM, and does not copy multicast traffic any more.
If the existing multicast session can not reach the CM, that is, the CM is not on line in the channel where the existing multicast session is, a copy of multicast bandwidth needs to be copied for the newly added CM.
Disclosure of Invention
In view of this, the present invention provides a method and a system for multicast traffic allocation to avoid the problem of reduced system bandwidth utilization caused by multicast traffic copying.
In a first aspect, an embodiment of the present invention provides a multicast traffic distribution method, where the method includes:
establishing a mapping relation between the multicast group and the multicast channel binding group;
when the customer premises equipment CPE under the coaxial modem CM joins in the multicast group, a multicast session is established, and the multicast flow of the multicast group is bound to the corresponding channel of the multicast channel binding group, thereby realizing the distribution of the multicast bandwidth.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where the multicast session includes a newly established multicast session, and the establishing a multicast session binds multicast traffic of the multicast group to a channel corresponding to the multicast channel binding group, so as to implement allocation of the multicast bandwidth includes:
establishing the newly-established multicast session, and searching the corresponding multicast channel binding group according to a multicast address;
if the CM downlink channel set comprises a channel corresponding to the multicast channel binding group, a multicast service stream is created, and a downlink service identifier DSID is allocated to bear the multicast traffic in the multicast service stream.
With reference to the first possible implementation manner of the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, where the establishing a multicast session, and binding multicast traffic of the multicast group to a channel corresponding to the multicast channel binding group, so as to implement allocation of the multicast bandwidth further includes:
and if the CM downlink channel set does not comprise the multicast channel bonding group, sending a receiving channel configuration RCC to the CM through a dynamic bonding change DBC so that the CM is transferred to a channel specified by the RCC and joins the multicast group.
With reference to the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, where the multicast session further includes an established multicast session, and the binding of the multicast traffic of the multicast group to a channel corresponding to the multicast channel binding group so as to implement allocation of the multicast bandwidth further includes:
if the CPE is added into the established multicast session, searching a corresponding multicast channel binding group according to a multicast address;
and if the CM downlink channel set comprises the channel corresponding to the multicast channel binding group, filtering and forwarding the multicast data packet through the DSID.
With reference to the third possible implementation manner of the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, where the binding the multicast traffic of the multicast group to a channel corresponding to the multicast channel binding group, so as to implement allocation of the multicast bandwidth further includes:
and if the CM downlink channel set does not comprise the multicast channel binding group, sending an RCC to the CM through a DBC (direct bus controller) so that the CM is transferred to a channel specified by the RCC, and filtering and forwarding the multicast data packet through the DSID.
In a second aspect, an embodiment of the present invention further provides a multicast traffic distribution system, where the system includes:
a mapping relation establishing unit, configured to establish a mapping relation between the multicast group and the multicast channel bonding group;
and the distribution unit is used for establishing a multicast session and binding the multicast flow of the multicast group to a channel corresponding to the multicast channel binding group under the condition that the Customer Premises Equipment (CPE) under the CM is added into the multicast group, so that the multicast bandwidth is distributed.
With reference to the second aspect, an embodiment of the present invention provides a first possible implementation manner of the second aspect, where the multicast session includes a newly established multicast session, and the allocating unit includes:
establishing the newly-established multicast session, and searching the corresponding multicast channel binding group according to a multicast address;
and if the CM downlink channel set comprises a channel corresponding to the multicast channel binding group, creating a multicast service stream, and distributing a DSID to bear the multicast flow in the multicast service stream.
With reference to the first possible implementation manner of the second aspect, an embodiment of the present invention provides a second possible implementation manner of the second aspect, where the allocation unit further includes:
and if the CM downlink channel set does not comprise the multicast channel bonding group, sending an RCC to the CM through a DBC so that the CM is transferred to a channel specified by the RCC and joins the multicast group.
With reference to the second aspect, an embodiment of the present invention provides a third possible implementation manner of the second aspect, where the multicast session further includes an established multicast session, and the allocating unit further includes:
if the CPE is added into the established multicast session, searching a corresponding multicast channel binding group according to a multicast address;
and if the CM downlink channel set comprises the channel corresponding to the multicast channel binding group, filtering and forwarding the multicast data packet through the DSID.
With reference to the third possible implementation manner of the second aspect, an embodiment of the present invention provides a fourth possible implementation manner of the second aspect, where the allocation unit further includes:
and if the CM downlink channel set does not comprise the multicast channel binding group, sending an RCC to the CM through a DBC (direct bus controller) so that the CM is transferred to a channel specified by the RCC, and filtering and forwarding the multicast data packet through the DSID.
The embodiment of the invention provides a multicast flow distribution method and a system, wherein a mapping relation is established between a multicast group and a multicast channel binding group; when customer end equipment CPE under the CM joins in a multicast group, a multicast session is established, and multicast flow of the multicast group is bound to a channel corresponding to a multicast channel binding group, so that multicast bandwidth is distributed, and the utilization rate of system bandwidth is improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of a multicast traffic distribution method according to an embodiment of the present invention;
fig. 2 is a flowchart of step S102 in the multicast traffic distribution method according to an embodiment of the present invention;
fig. 3 is another flowchart of step S102 in the multicast traffic distribution method according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a multicast traffic distribution structure according to a second embodiment of the present invention;
fig. 5 is a schematic diagram of a multicast traffic distribution system according to a third embodiment of the present invention.
Icon:
10-a mapping relationship establishing unit; 20-allocation unit.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
For the understanding of the present embodiment, the following detailed description will be given of the embodiment of the present invention.
The first embodiment is as follows:
fig. 1 is a flowchart of a multicast traffic distribution method according to an embodiment of the present invention.
Referring to fig. 1, the method includes the steps of:
step S101, establishing a mapping relation between a multicast group and a multicast channel binding group;
step S102, when the customer terminal equipment CPE under the CM joins in the multicast group, a multicast session is established, and the multicast flow of the multicast group is bound to the corresponding channel of the multicast channel binding group, thereby realizing the distribution of the multicast bandwidth.
Specifically, in a DOCSIS (Data-Over-Cable Service Interface Specifications) system, when a CPE under a CM joins a multicast group to establish a multicast session, a problem of a reduction in system bandwidth utilization is solved by directly binding multicast traffic to a corresponding multicast channel binding group.
And establishing a mapping relation between the multicast group and the multicast channel binding group, so that the multicast channel binding group can bear more programs. In a cell covered by a CMTS device, the number of programs watched by a user at the same time is limited, usually, the user only occupies a part of relatively fixed device bandwidth, binds higher bandwidths of a plurality of channels in a group, and can ensure that a multicast channel binding group can bear more program streams by utilizing the statistical multiplexing characteristic of the bandwidth, thereby avoiding the vacancy of the bandwidth, enriching the content of operation programs and improving the bandwidth utilization rate of a system.
The method can also realize the isolation of IPTV (Internet Protocol Television) Service and Internet Service, ensure the independent QoS (Quality of Service), and is easy to plan and maintain the Service.
Further, the multicast session includes a newly established multicast session, and referring to fig. 2, step S102 includes the following steps:
step S201, establishing the new multicast session, and searching the corresponding multicast channel binding group according to the multicast address;
step S202, if the CM downlink channel set includes a channel corresponding to the multicast channel bonding group, a multicast Service stream is created, and a DSID (Downtraffic Service ID) is assigned to carry the multicast traffic in the multicast Service stream;
step S203, if the CM downlink Channel set does not include the multicast Channel Bonding group, sending RCC (Receive Channel Configuration) to the CM through DBC (Dynamic Bonding Change) so that the CM is transferred to a Channel specified by the RCC and joins in the multicast group.
Specifically, in order to avoid the problem that when CPEs under different CMs request to join a multicast group, multicast traffic is duplicated due to different CM bonded channels, and to enable the CMTS device to support as many program streams as possible, a mapping relationship may be established between the multicast group and the multicast channel bonded group, and different program streams may be allocated to different multicast channel bonded groups, so that program traffic planning is more reasonable.
When the multicast session is established, the multicast traffic of the multicast group is bound to the corresponding channel of the multicast channel binding group corresponding to the multicast group, and when a subsequent CM is added to the multicast group, the CM is still planned to the multicast channel binding group, so that the multicast traffic is restricted to a fixed channel set, and the replication of the multicast traffic is avoided.
Further, the multicast session further includes an established multicast session, and referring to fig. 3, step S102 further includes the following steps:
step S301, if CPE joins in the established multicast session, then the corresponding multicast channel binding group is searched according to the multicast address;
step S302, if the CM downlink channel set includes the channel corresponding to the multicast channel binding group, filtering and forwarding the multicast data packet through the DSID;
step S303, if the CM downlink channel set does not include the multicast channel bonding group, sending an RCC to the CM through a DBC, so that the CM is transferred to a channel designated by the RCC, and filtering and forwarding a multicast data packet through a DSID.
Specifically, the distribution of multicast traffic in the newly-established multicast session and the established multicast session is completed through the above process, so that the problem that the same multicast traffic is duplicated on different channel sets is avoided.
Example two:
fig. 4 is a schematic diagram of a multicast traffic distribution structure according to an embodiment of the present invention.
Referring to fig. 4, a CMTS (Cable Modem Termination System, Media Access Control) domain includes 16 downlink channels, where channels 1 to 8 are planned to be multicast services, channels 9 to 16 are planned to be data services, and a specific process of configuring a multicast bonding group is as follows:
configuring a multicast binding group of a DS 1-4 channel as BG-1, planning as program stream 1-32, and configuring corresponding multicast groups as MG-1, MG-2, and MG-32;
configuring a multicast binding group of a DS 5-8 channel as BG-2, planning as a program stream 33-64, and configuring corresponding multicast groups as MG-33, MG-34, MG-64;
when a CPE under a CM joins in a multicast group and establishes a multicast session, a CMTS selects a channel for the CM to which the CPE belongs, creates a multicast service stream, configures an RCC according to a downlink channel where the CM is located, and specifically comprises the following steps for newly establishing the multicast session:
if the CM is on line on the DS 5-12 channel and the CPE under the CM requests to join the multicast group MG-33, the CMTS directly distributes the DSID and binds the multicast flow to the 5-8 channel;
if the CM comes online on the DS 5-12 channel and the CPE under the CM requests to join the multicast group MG-1, the CMTS sends the RCC to the CM through the DBC so that the CM adjusts its downstream channels to DS 1-4 and DS 9-12, and a multicast session is established at DS 1-4.
For the existing multicast session, the specific process is as follows:
if the CM is on line in the DS 5-12 channel and the CPE under the CM requests to join the multicast group MG-33, filtering and forwarding the multicast data packet through the DSID;
if the CM is on line on the DS 5-12 channel and the CPE under the CM requests to join the multicast group MG-1, the CMTS sends RCC to the CM through the DBC so that the CM adjusts the downstream channel to DS 1-4 and DS 9-12, and then filters and forwards the multicast data packet through the DSID.
The embodiment of the invention provides a multicast flow distribution method, which establishes a mapping relation between a multicast group and a multicast channel binding group; when customer end equipment CPE under the CM joins in a multicast group, a multicast session is established, and multicast flow of the multicast group is bound to a channel corresponding to a multicast channel binding group, so that multicast bandwidth is distributed, and the utilization rate of system bandwidth is improved.
Example three:
fig. 5 is a schematic diagram of a multicast traffic distribution system according to a second embodiment of the present invention.
Referring to fig. 5, the system includes a mapping relationship establishing unit 10 and an assigning unit 20.
A mapping relationship establishing unit 10, configured to establish a mapping relationship between a multicast group and a multicast channel bonding group;
the allocating unit 20 is configured to establish a multicast session and bind the multicast traffic of the multicast group to a channel corresponding to the multicast channel binding group when the customer premises equipment CPE under the CM joins the multicast group, so as to allocate the multicast bandwidth.
Further, the multicast session includes a newly established multicast session, and the allocating unit 20 includes:
establishing the newly-established multicast session, and searching the corresponding multicast channel binding group according to a multicast address;
and if the CM downlink channel set comprises a channel corresponding to the multicast channel binding group, creating a multicast service stream, and distributing a DSID to bear the multicast flow in the multicast service stream.
Further, the distribution unit 20 further includes:
and if the CM downlink channel set does not comprise the multicast channel bonding group, sending an RCC to the CM through a DBC so that the CM is transferred to a channel specified by the RCC and joins the multicast group.
Further, the multicast session further includes an established multicast session, and the allocating unit 20 further includes:
if the CPE is added into the established multicast session, searching a corresponding multicast channel binding group according to a multicast address;
and if the CM downlink channel set comprises the channel corresponding to the multicast channel binding group, filtering and forwarding the multicast data packet through the DSID.
Further, the distribution unit 20 further includes:
and if the CM downlink channel set does not comprise the multicast channel binding group, sending an RCC to the CM through a DBC (direct bus controller) so that the CM is transferred to a channel specified by the RCC, and filtering and forwarding the multicast data packet through the DSID.
The embodiment of the invention provides a multicast flow distribution system, which establishes a mapping relation between a multicast group and a multicast channel binding group; when customer end equipment CPE under the CM joins in a multicast group, a multicast session is established, and multicast flow of the multicast group is bound to a channel corresponding to a multicast channel binding group, so that multicast bandwidth is distributed, and the utilization rate of system bandwidth is improved.
The computer program product provided in the embodiment of the present invention includes a computer-readable storage medium storing a program code, where instructions included in the program code may be used to execute the method described in the foregoing method embodiment, and specific implementation may refer to the method embodiment, which is not described herein again.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the system and the apparatus described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A method for multicast traffic distribution, the method comprising:
establishing a mapping relation between the multicast group and the multicast channel binding group;
when Customer Premises Equipment (CPE) under a Coaxial Modem (CM) joins in the multicast group, establishing a multicast session, and binding multicast flow of the multicast group into a channel corresponding to the multicast channel binding group, thereby realizing the distribution of the multicast bandwidth;
the multicast session further includes an established multicast session, and the binding of the multicast traffic of the multicast group to the channel corresponding to the multicast channel binding group, thereby implementing the allocation of the multicast bandwidth, further includes:
if the CPE is added into the established multicast session, searching a corresponding multicast channel binding group according to a multicast address;
and if the CM downlink channel set comprises the channel corresponding to the multicast channel binding group, filtering and forwarding the multicast data packet through the DSID.
2. The method according to claim 1, wherein the multicast session comprises a newly established multicast session, and the establishing of the multicast session binds the multicast traffic of the multicast group to a channel corresponding to the multicast channel binding group, so as to implement the allocation of the multicast bandwidth comprises:
establishing the newly-established multicast session, and searching the corresponding multicast channel binding group according to a multicast address;
if the CM downlink channel set comprises a channel corresponding to the multicast channel binding group, a multicast service stream is created, and a downlink service identifier DSID is allocated to bear the multicast traffic in the multicast service stream.
3. The method of claim 2, wherein the establishing the multicast session and binding the multicast traffic of the multicast group to a channel corresponding to the multicast channel binding group to implement the allocation of the multicast bandwidth further comprises:
and if the CM downlink channel set does not comprise the multicast channel bonding group, sending a receiving channel configuration RCC to the CM through a dynamic bonding change DBC so that the CM is transferred to a channel specified by the RCC and joins the multicast group.
4. The method of claim 1, wherein the binding the multicast traffic of the multicast group to a channel corresponding to the multicast channel binding group, so as to implement the allocation of the multicast bandwidth further comprises:
and if the CM downlink channel set does not comprise the multicast channel binding group, sending an RCC to the CM through a DBC (direct bus controller) so that the CM is transferred to a channel specified by the RCC, and filtering and forwarding the multicast data packet through the DSID.
5. A multicast traffic distribution system, the system comprising:
a mapping relation establishing unit, configured to establish a mapping relation between the multicast group and the multicast channel bonding group;
the distribution unit is used for establishing a multicast session and binding the multicast flow of the multicast group to a channel corresponding to the multicast channel binding group under the condition that the Customer Premises Equipment (CPE) under the CM is added into the multicast group, so that the multicast bandwidth is distributed;
the multicast session further includes an established multicast session, and the allocation unit further includes:
if the CPE is added into the established multicast session, searching a corresponding multicast channel binding group according to a multicast address;
and if the CM downlink channel set comprises the channel corresponding to the multicast channel binding group, filtering and forwarding the multicast data packet through the DSID.
6. The multicast traffic distribution system according to claim 5, wherein the multicast session comprises a newly established multicast session, and the distribution unit comprises:
establishing the newly-established multicast session, and searching the corresponding multicast channel binding group according to a multicast address;
and if the CM downlink channel set comprises a channel corresponding to the multicast channel binding group, creating a multicast service stream, and distributing a DSID to bear the multicast flow in the multicast service stream.
7. The multicast traffic distribution system according to claim 6, wherein the distribution unit further comprises:
and if the CM downlink channel set does not comprise the multicast channel bonding group, sending an RCC to the CM through a DBC so that the CM is transferred to a channel specified by the RCC and joins the multicast group.
8. The multicast traffic distribution system according to claim 5, wherein the distribution unit further comprises:
and if the CM downlink channel set does not comprise the multicast channel binding group, sending an RCC to the CM through a DBC (direct bus controller) so that the CM is transferred to a channel specified by the RCC, and filtering and forwarding the multicast data packet through the DSID.
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| CN112929289B (en) * | 2021-01-22 | 2022-07-26 | 西安电子科技大学 | Multicast frame transmission method based on multiple channels in star network |
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| CN1841989A (en) * | 2005-03-21 | 2006-10-04 | 美国博通公司 | Method and system for distributing high throughput bandwidth in a cable network |
| CN101073260A (en) * | 2004-12-10 | 2007-11-14 | 美国博通公司 | Upstream channel bonding in a cable communications system |
| CN104469535A (en) * | 2014-11-26 | 2015-03-25 | 鼎点视讯科技有限公司 | Broadcast video IP method and device based on C-DOCSIS system |
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| CN101073260A (en) * | 2004-12-10 | 2007-11-14 | 美国博通公司 | Upstream channel bonding in a cable communications system |
| CN1841989A (en) * | 2005-03-21 | 2006-10-04 | 美国博通公司 | Method and system for distributing high throughput bandwidth in a cable network |
| CN104469535A (en) * | 2014-11-26 | 2015-03-25 | 鼎点视讯科技有限公司 | Broadcast video IP method and device based on C-DOCSIS system |
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