CN101730279B - Cooperative work method of wireless local area network and 3G cellular network based on AP forwarding mechanism - Google Patents
Cooperative work method of wireless local area network and 3G cellular network based on AP forwarding mechanism Download PDFInfo
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- CN101730279B CN101730279B CN2009103117707A CN200910311770A CN101730279B CN 101730279 B CN101730279 B CN 101730279B CN 2009103117707 A CN2009103117707 A CN 2009103117707A CN 200910311770 A CN200910311770 A CN 200910311770A CN 101730279 B CN101730279 B CN 101730279B
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Abstract
The invention discloses a cooperative work method of a wireless local area network and a 3G cellular network based on an AP forwarding mechanism, relating to the wireless communication field; the invention solves the problem that the current wireless local area network and the 3G cellular network have low system processing service efficiency under a coupling work mode. The method comprises the steps as follows: if broadband packet service is required to be transmitted, user equipment sends a request to a base station through an air interface of the 3G network; the base station distributes a wireless assess point for serving the user equipment according to the network state right now; the user equipment and the wireless assess point are in paring connection, and then are in broadband connection through the wireless access point to realize service transmission between the user equipment and the base station; if voice calling service is transmitted, the user equipment sends a request to the base station through the air interface of the 3G network; the base station is directly connected with the user equipment to realize the service transmission between the user equipment and the base station. The invention is suitable for service process in wireless communication.
Description
Technical field
The present invention relates to wireless communication field, be specifically related to the method for WLAN and the collaborative work of 3G cellular network.
Background technology
Along with the demand in development of science and technology, market and the variation of competition, mobile radio communication and broadband radio access network develop and propelling towards developing direction separately is continuous respectively.3-G (Generation Three mobile communication system) is a seamless covering in the whole world, global roaming, comprises the big system of cellular mobile communications such as satellite mobile communication, land mobile.It can to the public provide preceding two generation product the various wide-band-messages that can not provide professional, like high-speed data, image and television image etc. at a slow speed, transmission rate can reach 2Mbit/s.And diversified wireless access network technology takes on a different character and professional providing capability, and present most widely used WLAN access technology can provide the transmission rate up to 54Mbit/s.The portion report that the JiWire of U.S. wireless medium information company issued before day shows that the hotspot quantity that China has has reached more than 40,000 (3.5 ten thousand in continent, more than 5000 in Taiwan), is only second to the second largest Radio Access Network of the U.S. for the whole world.Hotspot is meant the place that provides WLAN to insert the Internet service in public places.The report of JiWire claims, Radio Access Network just with high speed in global expansion, by the third season in this year, the whole world is total to surpass 28.6 ten thousand hotspot, and only has 5.3 ten thousand before 5 years.
The 3G cellular network is compared with WLAN, and peak rate is not high enough, but can realize that large tracts of land covers, and WLAN can provide high-rate service in the low speed mobile environment.So, fusion between 3G cellular network and the WLAN and the collaborative focus that becomes research.Interoperability scene in WLAN that proposes according to 3GPP and the 3G cellular network interconnect scheme 6, ETSI (ETSI) has proposed loose coupling and two kinds of schemes of close coupling.
In the loose coupling scheme, 3G cellular network and WLAN are separate, are independent of each other; The specification requirement that realizes two network integrations is lower; Need not carry out big upgrading and transformation, portable terminal is not had specific (special) requirements, only need contain the dual-mode terminal of these two kinds of network interfaces prior network device.But; When the user adopts dual-mode terminal; Must adopt the mode that moves IP could realize portable terminal two internetwork switchings, and the continuity of session before and after can not guaranteeing to switch, be not suitable for the business higher to qos requirement; The different business interval can't be shared load each other, and the network management difficulty is bigger.
In the close coupling scheme; WLAN can share the various resources (like resources of core network, authentication and charge system etc.) of using the 3G cellular network, and can adopt unified access server is that two networks provide access service, can be generalized to new business in two kinds of networks easily; When adopting dual-mode terminal; The user can be implemented in two internetwork seamless switchings, and the continuity of session is supported better QoS before and after guaranteeing to switch.
In traditional close coupling scheme, WLAN has a plurality of access points (AP), and a plurality of AP connect into distribution formula system.When subscriber equipment (UE) got into the WLAN coverage, service set (SSID) helped UE to insert WLAN as the identifier of WLAN, moves authentication arithmetic simultaneously, and command transmitting.At this moment, the 3G cellular network is regarded wlan system as an independent base station (Node B) subsystem, the user two internetwork switchings just be equivalent to two independently the minizone carry out the same.
But tightly coupled system need move control procedures such as authentication, switching, resource management in wlan subsystem, for performance and the capacity of WLAN higher requirement is arranged.And there is the shortcoming that is difficult for supporting third party WLAN in tightly coupled system.Therefore, explore the problem that new WLAN and the cooperative work mode between the 3G cellular network have become a key in the heterogeneous network fusion.
Summary of the invention
The present invention is in order to solve the professional inefficient problem of existing WLAN and 3G cellular network system handles under coupling work mode, thereby proposes a kind of WLAN and 3G cellular network collaboration working method based on the AP forwarding mechanism.
WLAN and 3G cellular network collaboration working method based on the AP forwarding mechanism; Said method is based on the realization of following system: said system comprises core net CN, UMTS wireless access network UTRAN; Said UMTS wireless access network UTRAN is made up of many groups Radio Network System RNS, UMTS wireless access network UTRAN with the transfer of data of each Radio Network System RNS to core net CN;
Every group of Radio Network System RNS comprises a radio network controller (RNC), base station node B and wireless access points AP; Said wireless access points AP is connected to base station node B through EtherChannel, is used for the forwarding data between user equipment (UE) and base station NodeB; Said radio network controller (RNC) receives the data that base station node B sends;
Said WLAN and 3G cellular network collaboration working method based on the AP forwarding mechanism is intact existing by following steps:
If it is professional that business waiting for transmission is a broadband packet, then preferred AP retransmission method, its concrete steps are:
Step 1, user equipment (UE) send request through the Uu interface to base station node B;
Step 2, base station node B are the user equipment (UE) service according to request that receives and network state distribution this moment wireless access points AP; Realize matching between user equipment (UE) and the wireless access points AP and be connected;
Step 3, user equipment (UE) carry out broadband connection through the wireless access points AP of correspondence, realize the business transmission between user equipment (UE) and the base station node B;
If business waiting for transmission is speech business, then preferred directly transmission method, its concrete steps are:
Steps A, user equipment (UE) send request through the Uu interface to base station node B;
Step B, base station node B directly are connected with user equipment (UE), realize the business transmission between user equipment (UE) and the base station node B.
Beneficial effect: the present invention introduces the base station sub-system in the UMTS network configuration with the AP forwarding mechanism; Make a plurality of wireless access points AP and base station node B collaborative work; For high speed packet service provides new access channel; Alleviate limited " bottleneck " that causes of radio channel resource, improved the capacity of system and the efficient of managing business.
Description of drawings
Fig. 1 is the schematic network structure of UMTS in the background technology (UMTS); Fig. 2 is the structural representation of Radio Network System in the embodiment one (RNS); Fig. 3 is a protocol conversion process sketch map of the present invention.
Embodiment
Embodiment one, based on the WLAN and the 3G cellular network collaboration working method of AP forwarding mechanism; Said method is based on the realization of following system: said system comprises core net CN, UMTS wireless access network UTRAN; Said UMTS wireless access network UTRAN is made up of many groups Radio Network System RNS, UMTS wireless access network UTRAN with the transfer of data of each Radio Network System RNS to core net CN;
Every group of Radio Network System RNS comprises a radio network controller (RNC), base station node B and wireless access points AP; Said wireless access points AP is connected to base station node B through EtherChannel, is used for the forwarding data between user equipment (UE) and base station NodeB; Said radio network controller (RNC) receives the data that base station node B sends;
Said WLAN and 3G cellular network collaboration working method based on the AP forwarding mechanism is intact existing by following steps:
If it is professional that business waiting for transmission is a broadband packet, then preferred AP retransmission method, its concrete steps are:
Step 1, user equipment (UE) send request through the Uu interface to base station node B;
Step 2, base station node B are the user equipment (UE) service according to request that receives and network state distribution this moment wireless access points AP; Realize matching between user equipment (UE) and the wireless access points AP and be connected;
Step 3, user equipment (UE) carry out broadband connection through the wireless access points AP of correspondence, realize the business transmission between user equipment (UE) and the base station node B;
If business waiting for transmission is speech business, then preferred directly transmission method, its concrete steps are:
Steps A, user equipment (UE) send request through the Uu interface to base station node B;
Step B, base station node B directly are connected with user equipment (UE), realize the business transmission between user equipment (UE) and the base station node B.
Operation principle: the basic structure of UMTS (UMTS) network and main open interface are as shown in Figure 1, and UTRAN comprises that the series of physical entity manages access network resource, and the mechanism that inserts core net is provided for UE.UTRAN is made up of a plurality of RNS, and these RNS link to each other with core net through the Iu interface.A RNS comprises a RNC and one or more Node B.Open interface Iur opens each RNS branch, can realize that macrocell divides collection and more efficiently RRM and mobility mechanism simultaneously.When network application during the Iur interface, UE can link to each other with network through a plurality of RNC.
Different RNC bears specific logical role during wireless connections, comprise SRNC (Serving RNC), DRNC (Drifting RNC) and CRNC (Controlling RNC).CRNC totally controls the logical resource of UTRAN access point.SRNC is responsible for the specific connection between UE and the UTRAN, and each has the UE of wireless connections that a SRNC is all arranged with UTRAN, is responsible for the wireless connections between UE and the UTRAN, and the main feature of SRNC is the Iu interface that it also is maintained into core net.When the Radio Resource between UTRAN and the UE need use the sub-district of other RNC controls rather than SRNC control itself, just need its logic function of DRNC performance.
Shown in Figure 2 is basic structure and the corresponding interface of RNS among the present invention.One or more AP and its collaborative work are arranged under each Node B.UE can pass through Uu interface and Node B direct communication, also can pass through the AP forwarding packet data.
The protocol stack of Uu interface is divided into user plane and control plane two parts.User plane is used for transmitting the user data through Access Network.Control plane is controlled (comprising control and switching of service request, different transfer resources etc.) to the connection between RAB and UE and the network.In addition, control plane also provides the mechanism of non-access layer information transparent transmission.The Uu interface protocol is referring to 3GPP TS 25.2xx and TS 25.3xx.
In the present invention, UE need be a dual-mode terminal of supporting UMTS air interface and WLAN air interface.AP is as the co-channel of transmission user grouped data, inserts Node B through Ethernet, and the wireless transmission protocol of 802.11 series is adopted in communicating by letter between UE and AP.Realize the conversion of related protocol, form by the AP gateway.
The present invention has increased the processing capacity to ethernet data stream in Node B, can be translated into the data format that meets the Iub interface agreement.Node B realizes the function of Iub interface through the conversion of protocol stack.For traditional narrow band services such as voice, Node B controls it through the Uu interface, adopts traditional network method to realize communication service.Professional for broadband packet, Node B controls equipment UE through the Uu interface, if need utilize AP to carry out work the time, then Node B utilizes Ethernet control AP to carry out the professional transmission of broadband packet for UE.That is to say that Node B can be mapped to physical channel to the information that comes from transmission channel according to the arrangement of RNC.
Shown in Figure 3 is control signaling and the protocol conversion process of grouped data between distinct interface among the present invention.
Physical layer is come control channel and data service through the control physical medium.The physical layer of UMTS air interface generally is based on WCDMA or the TD-SCDMA wireless technology designs.The PHY of Uu interface is controlled the use of physical channel at the Uu interface, and to high level service is provided with the form of transmission channel.Transmission channel has defined the different modes of data in the transmission of UMTS air interface.The mapping of transmission channel and physical channel is accomplished by PHY.
The transport network protocols of Uu interface mainly is medium access control (MAC) agreement of radio link layer.The MAC agreement activates at UE, Node B and RNC entity place, and as the part of common transmission network, it provides service for user plane and control plane.The MAC agreement provides service with the mode of logic channel, and logic channel defines according to the biography type of data.
Claims (1)
1. based on the WLAN and the 3G cellular network collaboration working method of AP forwarding mechanism; Said method is based on the realization of following system: said system comprises core net CN, UMTS wireless access network UTRAN; Said UMTS wireless access network UTRAN is made up of many groups Radio Network System RNS, UMTS wireless access network UTRAN with the transfer of data of each Radio Network System RNS to core net CN;
Every group of Radio Network System RNS comprises a radio network controller (RNC), base station node B and wireless access points AP; Said wireless access points AP is connected to base station node B through EtherChannel, is used for the forwarding data between user equipment (UE) and base station node B; Said radio network controller (RNC) receives the data that base station node B sends;
It is characterized in that: said WLAN and 3G cellular network collaboration working method based on the AP forwarding mechanism realized by following steps:
If it is professional that business waiting for transmission is a broadband packet, then select the AP retransmission method, its concrete steps are:
Step 1, user equipment (UE) send request through the Uu interface to base station node B;
Step 2, base station node B are the user equipment (UE) service according to request that receives and network state distribution this moment wireless access points AP; Realize matching between user equipment (UE) and the wireless access points AP and be connected;
Step 3, user equipment (UE) carry out broadband connection through the wireless access points AP of correspondence, realize the business transmission between user equipment (UE) and the base station node B;
If business waiting for transmission is speech business, then select direct transmission method, its concrete steps are:
Steps A, user equipment (UE) send request through the Uu interface to base station node B;
Step B, base station node B directly are connected with user equipment (UE), realize the business transmission between user equipment (UE) and the base station node B.
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| CN2009103117707A CN101730279B (en) | 2009-12-18 | 2009-12-18 | Cooperative work method of wireless local area network and 3G cellular network based on AP forwarding mechanism |
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| US8971872B2 (en) | 2010-10-15 | 2015-03-03 | Telefonaktiebolaget L M Ericsson (Publ) | Method for performing and a device for providing a M2ME fail over mechanism |
| CN103052142B (en) * | 2011-10-13 | 2016-05-25 | ***通信集团公司 | Network selecting method, mobile terminal and base station |
| CN102395219B (en) * | 2011-11-07 | 2014-04-16 | 大唐移动通信设备有限公司 | Method, device and system for WLAN data transmission |
| US9532269B2 (en) | 2012-04-11 | 2016-12-27 | Broadcom Corporation | Method and apparatus for offloading data |
| CN103428826A (en) * | 2012-05-16 | 2013-12-04 | 中兴通讯股份有限公司 | Method and device for access point of wireless local area network to access mobile network |
| CN103582079A (en) * | 2012-08-10 | 2014-02-12 | 中兴通讯股份有限公司 | Method and system for joint transmission |
| CN103634921A (en) * | 2012-08-20 | 2014-03-12 | 中兴通讯股份有限公司 | Network control method and base station |
| CN103686859B (en) * | 2012-09-17 | 2018-04-27 | 中兴通讯股份有限公司 | A kind of shunt method based on Multi net voting joint transmission, system and access network elements |
| US9749874B2 (en) * | 2013-07-17 | 2017-08-29 | Qualcomm Incorporated | Multi-band management of wireless relaying networks |
| CN104427492B (en) * | 2013-08-19 | 2019-01-01 | 中兴通讯股份有限公司 | It was found that the method for the WLAN access net gateway address trusted |
| US20150109997A1 (en) * | 2013-10-21 | 2015-04-23 | Alexander Sirotkin | Apparatus, system and method of interfacing between a cellular manager and a wlan access device |
| US10292080B2 (en) * | 2015-06-10 | 2019-05-14 | Htc Corporation | Device and method of aggregating WLAN and LTE system |
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| CN1898984A (en) * | 2003-10-24 | 2007-01-17 | 高通股份有限公司 | Handoff between a wireless local area network and a cellular communication system |
| CN101048991A (en) * | 2004-08-27 | 2007-10-03 | 三星电子株式会社 | Cellular mobile communication system and method using heterogeneous wireless network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1898984A (en) * | 2003-10-24 | 2007-01-17 | 高通股份有限公司 | Handoff between a wireless local area network and a cellular communication system |
| CN101048991A (en) * | 2004-08-27 | 2007-10-03 | 三星电子株式会社 | Cellular mobile communication system and method using heterogeneous wireless network |
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