Architecture for signal distribution in wireless data network
View Patent ↗A simple and low cost architecture for a distribution network is provided for coupling wireless local area network (“wireless LAN”) signals between geographically distributed access points and centrally located internetworking devices. The distribution network eliminates complexities involved with the deployment of such systems in the past, which have typically required the computer network-compatible wiring to be extended to each access point directly from an internetworking device such as a repeater, bridge, router, or gateway. The distribution network makes it economically efficient to deploy wireless local area networking equipment in locations where wired network infrastructure is not readily available. In particular, any convenient existing physical wiring, such as may be provided by the existing optical transport cabling of a fiber optic network, is used as a physical layer transport medium to carry the wireless local area network signals between the access points and centrally located network hub equipment.
1. A distribution network for coupling wireless local area network signals between an internetworking device and a plurality of remotely located access points, to provide wireless local area network service within a geographic coverage area composed of microcells, the distribution network making use of available optical transport cabling of a fiber optic network, comprising:
(a) a plurality of cable access points, each deployed within a respective one of the microcells, the cable access points each further comprising:
i) a wireless local area network access point, for receiving wireless local area network (WLAN) format signals from computing equipment located within the respective microcell, and converting the WLAN format signals to wired local area network format compatible signals;
ii) an access point remote optical converter, for receiving the wired local area network format compatible signals from the wireless local area network access point and converting the wired local area network format signals to optical frequency signals for transmission over the available optical transport cabling;
(b) a head end access point, comprising:
i) a head end remote converter, connected to receive the optical signals from the optical transport cabling and to convert the optical signals to network compatible signals.
2. The distribution network of claim 1 wherein the access point remote optical converter further comprises:
an access point remote bridge for receiving the wired local area network format compatible signals from the wireless local area network access point and converting the wired local area network format compatible signals to transport modulated format signals;
an optical frequency translator, disposed between the access point remote bridge and the optical transport cabling, for converting the transport modulated format signals produced by the access point remote bridge into the optical frequency signals.
3. The distribution network of claim 1 wherein the head end remote converter further comprises:
a head end remote bridge;
a head end optical frequency translator disposed between the optical transport cabling and the head end remote bridge, the head end optical frequency translator converting the optical frequency signals from the optical transport cabling to transport modulated format signals; and
the head end remote bridge receiving the transport modulated format signals produced by the head end optical frequency translator and converting the transport modulated format signals to the network compatible signals.
4. A distribution network as in claim 1 further comprising a hub for receiving the network compatible signals from the head end remote converter and for forwarding the network compatible signals to the internetworking device.
5. The distribution network of claim 1 wherein the network compatible signals are local area network (LAN) compatible signals or wide area network (WAN) compatible signals.
6. A distribution network for coupling wireless local area network signals between an internetworking device and a plurality of remotely located access points, to provide wireless local area network service within a geographic coverage area composed of microcells, the distribution network making use of available optical transport cabling of a fiber optic network, comprising:
(a) a plurality of access points, each deployed within a respective one of the microcells, the access points each further comprising:
i) a direct optical frequency translator that provides an interface between the optical transport cabling and the wireless local area network format signals and converts the wireless local area network format signals used within the respective microcells directly to optical signals for transmission over the optical transport cabling;
(b) a head end access point, comprising:
i) a head end frequency translation stage, for converting the optical signals from the optical transport cabling to wireless local area network transmission band signals; and
ii) a wireless local area network bridge, for receiving the wireless local area network transmission band signals and converting them to network compatible signals.