CN102196599B - Method and base station for enabling terminal to join in multicast group - Google Patents
Method and base station for enabling terminal to join in multicast group Download PDFInfo
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- CN102196599B CN102196599B CN201010120534.XA CN201010120534A CN102196599B CN 102196599 B CN102196599 B CN 102196599B CN 201010120534 A CN201010120534 A CN 201010120534A CN 102196599 B CN102196599 B CN 102196599B
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000012790 confirmation Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 9
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
- H04L12/185—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast with management of multicast group membership
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04W4/08—User group management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
- H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]
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Abstract
The embodiment of the invention provides a method and a base station for enabling a terminal to join in a multicast group. The method comprises the following steps: receiving uplink data sent by the terminal; determining whether the destination IP (internet protocol) address of the uplink data is a multicast group address; and if the destination IP address of the uplink data is determined to be the multicast group address, replacing the terminal to send a joining request of an IGMP (internet group management protocol) to the multicast group corresponding to the multicast group address. According to the embodiment of the invention, terminals which do not support the IGMP can be joined in the multicast group, thereby further enabling the terminals which do not support the IGMP to carry out multicast services.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a method and a base station for enabling a terminal to join a multicast group.
Background
In order to provide higher data transmission rate and smaller delay, and reduce the operation cost of the operator, 3GPP (3 rd Generation Partnership Project) proposes an access service based on h (E) NB (Home (E-) UTRAN NodeB, Home (evolved) base station). Such access services deploy h (e) NBs at a home, mall, or business. The user can Access the operator core network through the h (e) NB, and simultaneously, can Access the home network or the enterprise network through the h (e) NB to interconnect with other IP devices, which is called LIPA (Local IP Access).
Currently, the terminal may be interconnected with devices in a home or enterprise network through h (e) NB, and further, media content sharing may be implemented by using such interconnection. At present, the home network mainly adopts UPnP (Universal Plug and Play) to realize device interconnection. UPnP devices are plug-and-play devices that, when connected to a network, automatically announce their address and supported devices and service types, etc., so that clients can recognize their types and immediately begin using the device. All interconnected devices in the home network need to support a common protocol to enable auto discovery, data exchange with minimal user intervention, etc.
At present, the UPnP is generally implemented by using an IGMP (Internet Group Management Protocol) Protocol. IGMP is a protocol that supports multicasting between hosts and routers. The specific process is that when the first process of the host computer joins a multicast group, the host computer sends a joining request of IGMP; when a process leaves a multicast group, the host does not send IGMP messages and knows that no multicast group members are available in the determined multicast group, and no response messages are sent in subsequent IGMP queries. In summary, to implement multicast, both the host and the router need to support IGMP protocol.
In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art: in the prior art, for a terminal which does not support the IGMP protocol, the terminal itself cannot initiate an IGMP join request to join a home network multicast group, which means that the terminal which does not support the IGMP protocol cannot join the home network multicast group.
Disclosure of Invention
The embodiment of the invention provides a method and a base station for adding a terminal into a multicast group, so that the terminal which does not support an IGMP protocol can also be added into the multicast group, and the terminal which does not support the IGMP protocol can further carry out multicast service.
In one aspect, an embodiment of the present invention provides a method for a terminal to join a multicast group, where the method includes: a base station receives uplink data sent by a terminal; the base station determines whether the destination IP address of the uplink data is a multicast group address; if the base station determines that the destination IP address of the uplink data is a multicast group address, the base station replaces the terminal to send an Internet Group Management Protocol (IGMP) joining request to a multicast group corresponding to the multicast group address; the base station replaces the terminal to send an Internet Group Management Protocol (IGMP) joining request to a multicast group corresponding to the multicast group address, and simultaneously stores the corresponding relation between the IP address of the terminal and the IP address of the base station; and the base station replaces the terminal to maintain the multicast group, and simultaneously forwards downlink multicast data to the terminal according to the corresponding relation between the IP address of the terminal and the IP address of the base station.
In another aspect, an embodiment of the present invention provides a base station for enabling a terminal to join a multicast group, where the base station includes: a receiving unit, configured to receive uplink data sent by a terminal; a multicast group address determining unit, configured to determine whether a destination IP address of the uplink data is a multicast group address; a join request sending unit, configured to send a join request of an internet group management protocol IGMP to a multicast group corresponding to the multicast group address in place of the terminal when the multicast group address confirmation unit determines that the destination IP address of the uplink data is the multicast group address; a storing unit, configured to store a correspondence between an IP address of the terminal and an IP address of the base station when the join request sending unit replaces the terminal to send a join request of an internet group management protocol IGMP to a multicast group corresponding to the multicast group address; and the multicast unit is used for replacing the terminal to maintain the multicast group and simultaneously forwarding the downlink multicast data to the terminal according to the corresponding relation between the IP address of the terminal and the IP address of the base station.
The technical scheme has the following beneficial effects: because the base station supporting the IGMP protocol is adopted to replace the terminal which does not support the IGMP protocol to send the joining request of the IGMP, the terminal which does not support the IGMP protocol can also join the multicast group, thereby further enabling the terminal which does not support the IGMP protocol to carry out multicast service and realizing the content sharing with other network equipment.
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 only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a Local GW (Local Gateway) network architecture of H (e) NB;
FIG. 2 is a schematic diagram of NAT (Network Address Translation) architecture of H (e) (NB);
fig. 3 is a flowchart of a method for a terminal to join a multicast group according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a base station for enabling a terminal to join a multicast group according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another base station for enabling a terminal to join a multicast group according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a multicast unit according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
As shown in fig. 1, a schematic diagram of a Local GW Network architecture of a home (evolution) base station (h (e) NB), in the architecture, the h (e) NB locally sets a L-GGSN (Local GGSN, Local gateway GPRS support node) functional entity, which implements a sub-function of the GGSN (gateway GPRS support node), and separately allocates an IP address for a UE (User Equipment) to Access a PDN (Packet Data Network) connection of an LIPA (Local IP Access ) service; establishing a direct channel in a base station and L-GW (Local Gateway-Local Gateway) connection mode, and the like.
H (e) an L-GGSN functional entity locally provided by the NB may also be removed, and meanwhile, the NAT function is locally configured in h (e) NB to form a NAT architecture of h (e) NB, as shown in fig. 2. In the NAT architecture, local IP traffic routed through h (e) NB does not need to allocate a separate IP address (the main difference from the L-GGSN architecture), but is inspected by the NAT through policy configuration of an operator, and IP packets requiring h (e) NB local routing are routed locally through h (e) NB into a home network or an enterprise network. The NAT module also has the basic functions of common NAT, namely checking and converting IP addresses and the like.
Based on the network architecture, the terminal can be interconnected with devices in a home or enterprise network through h (e) NB. But may be implemented by joining a multicast group if sharing of media content with other devices in the network is to be implemented. IGMP is a protocol that supports multicasting between hosts and routers. The terminal can join the multicast group of the home or enterprise network by using the IGMP protocol to realize the sharing of the media content.
For the terminal which does not support the IGMP protocol, the embodiment of the invention can consider that H (e) NB supporting the IGMP protocol is used, the H (e) NB replaces the terminal to initiate a request for joining the multicast group, and then the H (e) NB replaces the terminal to maintain the multicast group and forwards multicast grouped data for the terminal. Media content sharing in a home network mainly involves the sharing of audio and video content. The terminal may obtain an SDP (Session Description Protocol) of the Streaming media service through the Announce or through a Description process of an RTSP (Real-Time Streaming Protocol) from the website, and describe an IP address of a host providing the service, an IP address and a port number of the media stream, a type of the media stream, and the like in the SDP. After the terminal obtains the content, the address of the media server or the media source in the SDP is checked as the multicast address, and then the terminal sends the uplink data.
As shown in fig. 3, a flowchart of a method for a terminal to join a multicast group according to an embodiment of the present invention is shown, where the method includes:
301. a base station receives uplink data sent by a terminal;
the base station may be one of: a home base station and a macro base station. In specific implementation, the terminal may obtain an SDP of the streaming media service through an announcement (Announce) or a Description (Description) process of the RTSP from the website, and describe, in the SDP, an IP address of a host providing the service, an IP address and a port number of the media stream, a type of the media stream, and the like. After the terminal obtains the content, the address of the media server or the media source in the SDP is checked to be a multicast address, and then the terminal sends uplink data (audio and video data) to the base station for receiving.
302. The base station determines whether the destination IP address of the uplink data is a multicast group address;
the base station locally implements the function of IGMP proxy of the terminal, and it can be configured on the local NAT of the base station or L-GGSN/P-GW (PDN Gateway) based on the existing base station architecture, check the destination IP address of the data sent by the terminal, and determine whether it is a multicast address as the destination IP address.
303. And if the base station determines that the destination IP address of the uplink data is a multicast group address, the base station replaces the terminal to send an Internet Group Management Protocol (IGMP) joining request to a multicast group corresponding to the multicast group address.
If the destination IP address is the multicast group address, the base station initiates an IGMP joining process to the multicast group corresponding to the multicast group address. The base station sends an IGMP report to the multicast router, setting TTL =1, IGMP address = multicast group address, destination IP address = multicast group address, source IP address = IP address of terminal, or IP address of base station. Meanwhile, the base station reserves the corresponding relation between the IP address of one terminal and the IP address of the base station. The terminal transmits media data to other devices of the multicast group it has joined. The multicast router sends an IGMP query message to see if any hosts contain processes belonging to the multicast group. In the process, after receiving the IGMP query message, the base station returns an IGMP report instead of the terminal. TTL =1, an IGMP group address =0, a destination IP address =224.0.0.1, and a source IP address = a router IP address are set in an IGMP query message sent by a multicast router. When downlink multicast data is transmitted to the base station, the base station checks a destination IP address. If the destination IP address is the base station IP address, the destination IP address is modified into the corresponding terminal IP address belonging to the multicast group by utilizing the corresponding relation between the terminal IP address locally stored in the base station and the base station IP address, so that the multicast group is sent to the corresponding terminal. If the destination IP address is the terminal IP address, the base station directly forwards the multicast grouped data to the corresponding terminal.
In the technical scheme of the method of the embodiment of the invention, the base station supporting the IGMP protocol is adopted to replace the terminal not supporting the IGMP protocol to send the joining request of the IGMP, so that the terminal not supporting the IGMP protocol can also join the multicast group, thereby further enabling the terminal not supporting the IGMP protocol to carry out multicast service and realizing content sharing with other network equipment.
Corresponding to the above method embodiment, the embodiment of the present invention further provides a base for enabling a terminal to join a multicast group; as shown in fig. 4, which is a schematic structural diagram of a base station for enabling a terminal to join a multicast group according to an embodiment of the present invention, the base station includes:
a receiving unit 401, configured to receive uplink data sent by a terminal;
a multicast group address determining unit 402, configured to determine whether a destination IP address of the uplink data is a multicast group address;
a join request sending unit 403, configured to send a join request of an internet group management protocol IGMP to a multicast group corresponding to the multicast group address instead of the terminal when the multicast group address confirmation unit determines that the destination IP address of the uplink data is the multicast group address.
Optionally, the join request sending unit 403 may include: a join request generating unit 4031, configured to generate the join request of the IGMP when the multicast group address confirmation unit 402 confirms that the destination IP address of the uplink data is a multicast group address, where a source IP address in the IGMP join request is an IP address of the terminal or an IP address of the base station.
Optionally, as shown in fig. 5, which is a schematic structural diagram of another base station for enabling a terminal to join a multicast group according to an embodiment of the present invention, the base station includes, in addition to the receiving unit 401, the multicast group address determining unit 402, and the join request sending unit 403 shown in fig. 4, the base station may further include: a storing unit 404, configured to store a correspondence between the IP address of the terminal and the IP address of the base station when the join request sending unit 403 replaces the terminal to send a join request of an internet group management protocol IGMP to the multicast group corresponding to the multicast group address. The base station may further include: a multicast unit 405, configured to replace the terminal to maintain the multicast group, and forward downlink multicast data to the terminal according to a correspondence between an IP address of the terminal and an IP address of the base station. As shown in fig. 6, which is a schematic structural diagram of a multicast unit according to an embodiment of the present invention, the multicast unit 405 may include: a destination IP address determining unit 4051, configured to determine, when the downlink multicast data is received, whether a destination IP address in the downlink multicast data is an IP address of the terminal or an IP address of the base station; a first downlink data sending unit 4052, configured to modify a destination IP address in the downlink multicast data into an IP address of the terminal by using a correspondence between the IP address of the terminal and the IP address of the base station, which is stored by the storage unit, if the destination IP address determining unit determines that the destination IP address in the downlink multicast data is the IP address of the base station, so as to send the downlink multicast data to the terminal; or, the second downlink data sending unit 4053 is configured to directly send the downlink multicast data to the terminal if the destination IP address determining unit determines that the destination IP address in the downlink multicast data is the IP address of the terminal.
The base station is one of the following: a home base station and a macro base station. In specific implementation, the terminal may obtain an SDP of the streaming media service through an announcement (Announce) or a Description (Description) process of the RTSP from the website, and describe, in the SDP, an IP address of a host providing the service, an IP address and a port number of the media stream, a type of the media stream, and the like. After the terminal obtains the content, the address of the media server or the media source in the SDP is checked to be a multicast address, and then the terminal sends uplink data (audio and video data) to the base station for receiving. The base station configures the first checking unit 402 and the IGMP sending unit 403 locally, so as to implement the function of IGMP proxy of the terminal, and it can configure on the NAT or L-GGSN/P-GW (PDN Gateway) local to the base station based on the existing base station architecture, check the destination IP address of the data sent by the terminal, and determine whether the destination IP address is a multicast address. If the destination IP address is the multicast group address, the base station initiates an IGMP joining process to the multicast group corresponding to the multicast group address. The base station sends an IGMP report to the multicast router, setting TTL =1, IGMP address = multicast group address, destination IP address = multicast group address, source IP address = IP address of terminal, or IP address of base station. Meanwhile, the base station reserves the corresponding relation between the IP address of one terminal and the IP address of the base station. The terminal transmits media data to other devices of the multicast group it has joined. The multicast router sends an IGMP query message to see if any hosts contain processes belonging to the multicast group. In the process, after receiving the IGMP query message, the base station returns an IGMP report instead of the terminal. TTL =1, an IGMP group address =0, a destination IP address =224.0.0.1, and a source IP address = a router IP address are set in an IGMP query message sent by a multicast router. When downlink multicast data is transmitted to the base station, the base station checks a destination IP address. If the destination IP address is the base station IP address, the destination IP address is modified into the corresponding terminal IP address belonging to the multicast group by utilizing the corresponding relation between the terminal IP address locally stored in the base station and the base station IP address, so that the multicast group is sent to the corresponding terminal. If the destination IP address is the terminal IP address, the base station directly forwards the multicast grouped data to the corresponding terminal.
In the technical scheme of the device in the embodiment of the invention, the base station supporting the IGMP protocol is adopted to replace the terminal not supporting the IGMP protocol to send the joining request of the IGMP, so that the terminal not supporting the IGMP protocol can also join the multicast group, and the terminal not supporting the IGMP protocol further carries out multicast service, thereby realizing content sharing with other network equipment.
Those skilled in the art will appreciate that all or part of the steps in the method according to the above embodiments may be implemented by a program, which is stored in a computer-readable storage medium and includes all or part of the steps when the program is executed, and the storage medium, such as: ROM/RAM, magnetic disks, optical disks, and the like.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. A method for a terminal to join a multicast group, the method comprising:
a base station receives uplink data sent by a terminal;
the base station determines whether the destination IP address of the uplink data is a multicast group address;
if the base station determines that the destination IP address of the uplink data is a multicast group address, the base station replaces the terminal to send an Internet Group Management Protocol (IGMP) joining request to a multicast group corresponding to the multicast group address;
the base station replaces the terminal to send an Internet Group Management Protocol (IGMP) joining request to a multicast group corresponding to the multicast group address, and simultaneously stores the corresponding relation between the IP address of the terminal and the IP address of the base station;
and the base station replaces the terminal to maintain the multicast group, and simultaneously forwards downlink multicast data to the terminal according to the corresponding relation between the IP address of the terminal and the IP address of the base station.
2. The method of claim 1, wherein the source IP address in the IGMP join request is an IP address of the terminal or an IP address of the base station.
3. The method of claim 1, wherein the base station forwards the downlink multicast data to the terminal according to the correspondence between the IP address of the terminal and the IP address of the base station, comprising:
when the base station receives the downlink multicast data, determining a destination IP address in the downlink multicast data;
if the destination IP address in the downlink multicast data is the IP address of the base station, the base station modifies the destination IP address in the downlink multicast data into the IP address of the terminal by using the stored corresponding relation between the IP address of the terminal and the IP address of the base station, thereby sending the downlink multicast data to the terminal; or, if the destination IP address in the downlink multicast data is the IP address of the terminal, the base station directly forwards the downlink multicast data to the terminal.
4. A base station for a terminal to join a multicast group, the base station comprising:
a receiving unit, configured to receive uplink data sent by a terminal;
a multicast group address determining unit, configured to determine whether a destination IP address of the uplink data is a multicast group address;
a join request sending unit, configured to send a join request of an internet group management protocol IGMP to a multicast group corresponding to the multicast group address in place of the terminal when the multicast group address confirmation unit determines that the destination IP address of the uplink data is the multicast group address;
a storing unit, configured to store a correspondence between an IP address of the terminal and an IP address of the base station when the join request sending unit replaces the terminal to send a join request of an internet group management protocol IGMP to a multicast group corresponding to the multicast group address;
and the multicast unit is used for replacing the terminal to maintain the multicast group and simultaneously forwarding the downlink multicast data to the terminal according to the corresponding relation between the IP address of the terminal and the IP address of the base station.
5. The base station of claim 4, wherein the join request transmitting unit comprises:
and a join request generation unit, configured to generate a join request of the IGMP when the multicast group address confirmation unit confirms that the destination IP address of the uplink data is a multicast group address, where a source IP address in the join request of the IGMP is an IP address of the terminal or an IP address of the base station.
6. The base station of claim 4, wherein the multicast unit comprises:
a destination IP address determination unit, configured to determine, when the downlink multicast data is received, whether a destination IP address in the downlink multicast data is an IP address of the terminal or an IP address of the base station;
a first downlink data sending unit, configured to modify a destination IP address in the downlink multicast data into an IP address of the terminal by using a correspondence between the IP address of the terminal and the IP address of the base station, which is stored by the storage unit, if the destination IP address determining unit determines that the destination IP address in the downlink multicast data is the IP address of the base station, so as to send the downlink multicast data to the terminal; or,
and the second downlink data sending unit is used for directly sending the downlink multicast data to the terminal if the destination IP address determining unit determines that the destination IP address in the downlink multicast data is the IP address of the terminal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010120534.XA CN102196599B (en) | 2010-03-08 | 2010-03-08 | Method and base station for enabling terminal to join in multicast group |
| PCT/CN2011/071596 WO2011110078A1 (en) | 2010-03-08 | 2011-03-08 | Method and base station for enabling terminal to join multicast group |
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| CN201010120534.XA CN102196599B (en) | 2010-03-08 | 2010-03-08 | Method and base station for enabling terminal to join in multicast group |
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| CN102196599A CN102196599A (en) | 2011-09-21 |
| CN102196599B true CN102196599B (en) | 2014-04-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1852570A (en) * | 2005-09-05 | 2006-10-25 | 华为技术有限公司 | IP multi-cast system and method based on mobile network |
| CN101622831A (en) * | 2007-01-22 | 2010-01-06 | 英特尔公司 | Proxy IGMP client and method for providing multicast broadcast services in a broadband wireless access network |
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| EP2129037A1 (en) * | 2008-05-29 | 2009-12-02 | THOMSON Licensing | Method and apparatus for multicast group management |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1852570A (en) * | 2005-09-05 | 2006-10-25 | 华为技术有限公司 | IP multi-cast system and method based on mobile network |
| CN101622831A (en) * | 2007-01-22 | 2010-01-06 | 英特尔公司 | Proxy IGMP client and method for providing multicast broadcast services in a broadband wireless access network |
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| WO2011110078A1 (en) | 2011-09-15 |
| CN102196599A (en) | 2011-09-21 |
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