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Browse Prior Art Database

Seamless role swapping among several wireless gateway devices (Home Nodes) in a LAN

IP.com Disclosure Number: IPCOM000168080D
Original Publication Date: 2008-Mar-11
Included in the Prior Art Database: 2008-Mar-11
Document File: 3 page(s) / 169K

Publishing Venue

Siemens

Related People

Juergen Carstens: CONTACT

Abstract

With the increasing availability of wireless broadband access (WBA) networks and the growing number of subscribers, Home Node devices with multiple radio interfaces may take the role of today's WLAN routers and APs and become the commonly accepted device for providing WLAN access in a local area network (LAN). Thus giving the users access to the internet through a cellular network based on the third generation long-term evolution technology (3G LTE). As a consequence, there may be a considerable number of home and company networks including several Home Node devices with the main intention to provide WLAN coverage throughout the desired coverage region. It is therefore of interest to make efficient use of the availability of several Home Nodes in a LAN. With multiple Home Node devices in the same LAN, a decision must be made which of the devices shall actually act as the gateway to the wireless access network. For certain scenarios this decision may be easy to make, for example if an external, e.g. roof-mounted, antenna or antenna array shall be used for the wireless link to the base station. In general only one such antenna system will be available and the Home Node device connected to it should generally be assigned the role of the gateway. However, even in such a case the need to perform a manual configuration to assign the roles in the network makes the system vulnerable to errors in the installation process.

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Seamless role swapping among several wireless gateway devices (Home Nodes) in a LAN

Idea: Dr. Zhenping Hu, CN-Beijing; Xuegang Huang, CN-Shanghai; Dr. Mattias Lampe, CN-Beijing;

Dr. Jifeng Tian, CN-Beijing; Xinglin Wang, CN-Beijing; Jiezhang, CN-Beijing

With the increasing availability of wireless broadband access (WBA) networks and the growing number of subscribers, Home Node devices with multiple radio interfaces may take the role of today's WLAN routers and APs and become the commonly accepted device for providing WLAN access in a local area network (LAN). Thus giving the users access to the internet through a cellular network based on the third generation long-term evolution technology (3G LTE).

As a consequence, there may be a considerable number of home and company networks including several Home Node devices with the main intention to provide WLAN coverage throughout the desired coverage region. It is therefore of interest to make efficient use of the availability of several Home Nodes in a LAN. With multiple Home Node devices in the same LAN, a decision must be made which of the devices shall actually act as the gateway to the wireless access network. For certain scenarios this decision may be easy to make, for example if an external, e.g. roof-mounted, antenna or antenna array shall be used for the wireless link to the base station. In general only one such antenna system will be available and the Home Node device connected to it should generally be assigned the role of the gateway. However, even in such a case the need to perform a manual configuration to assign the roles in the network makes the system vulnerable to errors in the installation process.

If none of the Home Nodes has any obvious technical or local advantage over the other devices in the network, the user cannot easily decide which of the devices should - from a throughput and efficiency perspective - become the gateway to the access network. An automatic scheme for an optimized selection of the gateway device is therefore highly desirable.

The mentioned efficiency problem does not occur in current networks due to its technical layout. However, the problem of assigning particular roles in a network in a self-organizing manner is presently known and various solutions exist, e.g. election algorithms. Additionally, spatial diversity techniques such as combining or selecting among signals from multiple antennas of a receiver are commonly used today and many different diversity schemes exist. The benefits achievable by diversity effects, i.e. on the differences in signal quality depending on the antenna position are known and used for several applications.

Therefore, a novel solution is proposed which implements a suitable mechanism for determining, in a dynamic and adaptive way, the most favorable Home Node device for the role of the gateway...