Wireless architecture using multiple air interface

• US 20020146980A1
• Filed: 04/04/2001
• Published: 10/10/2002
• Est. Priority Date: 04/04/2001
• Status: Abandoned Application

• Current Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Sreenath, Krishnamurthy, Solondz, Max Aaron
• Application Number:
  US09/826,321
• Publication Number:
  US 20020146980A1
• Time in Patent Office: Days
• US Class Current: 455/21
• CPC Class Codes: H04W 16/26 Cell enhancers or enhancement, e.g. for tunnels, building shadow
• CPC Class Codes: H04W 88/10 adapted for operation in multiple networks, e.g. multi-mode access points

Abstract

A wireless architecture is disclosed based on the use of two separate air interfaces on two separate sets of uplinks and downlinks. In particular, the multiple air interface architecture of the invention incorporates a re-radiator that employs two different air interface protocols. One air interface protocol is used for “backhaul” reception and transmission to the serving network base station, and is deployed between the fixed network base station and the re-radiator. This air interface protocol is optimized for transmission over a long distance and for sharing among multiple users. A second air interface protocol is used for local re-radiation between the re-radiator and a served end user device. This second air interface is optimized for very short distances. The reradiator itself is placed at a fixed location allowing it to take advantage of antenna directionality and antenna gain, and also to meet certain requirements regarding fixed terminals.

Claims

1. A method for operating a wireless communications system comprising the steps of:

providing an intermediate RF element between a base station of said wireless communications system and an end user device of said system, said intermediate RF element being operative to maintain a communications link with said base station via a first air interface and with said end user device via a second air interface, and being further operative to translate a signal between said first and said second air interfaces.

2. The method of claim 1 wherein said first air interface is optimized for longer distance transmission and said second air interface is optimized for short distance transmission.

3. The method of claim 1 wherein said second air interface incorporates a Bluetooth protocol.

4. The method of claim 1 wherein said second air interface incorporates an IEEE 802.11b protocol.

5. The method of claim 1 wherein said intermediate RF element provides a protocol conversion between said first air interface and said second air interface.

6. The method of claim 1 wherein, for downlink transmission from said base station, said signal translation by said intermediate RF element encompasses a demodulation of a signal transmitted via said first air interface down to an application signal level and a re-modulation of said application signal level for transmission via said second air interface.

7. The method of claim 1 wherein, for uplink transmission from said end user device, said signal translation by said intermediate RF element encompasses a demodulation of a signal transmitted via said second air interface down to an application signal level and a re-modulation of said application signal level for transmission via said first air interface.

8. The method of claim 1 wherein a plurality of end user devices are provided a capability for communication via said second air interface with a given one of said intermediate RF elements when located proximately to said given one of said intermediate RF elements.

9. The method of claim 1 wherein ones of a plurality of said intermediate RF elements are provided at dispersed locations and further wherein all said ones of said plurality are provided a capability for communication via said second air interface with a given one of said end user devices.

10. A wireless system comprising:

a base station interconnected with a terrestrial communications network and operative to establish and maintain a wireless communications path via a first air interface;

an end user device operative to establish and maintain a wireless communications path via a second air interface; and

an intermediate RF element disposed in proximity to said end user device and operative to effect an interconnection between (1) a communications path between said intermediate RF element and said end user device via said second air interface and (2) a communications path between said intermediate RF element and said base station via said first air interface.

11. The wireless system of claim 10 wherein said first air interface is optimized for longer distance transmission and said second air interface is optimized for short distance transmission.

12. The wireless system of claim 10 wherein said second air interface incorporates a Bluetooth protocol.

13. The wireless system of claim 10 wherein said second air interface incorporates an IEEE 802.11b protocol.

14. The wireless system of claim 10 wherein said intermediate RF element provides a protocol conversion between said first air interface and said second air interface.

15. The wireless system of claim 10 wherein said intermediate RF element provides a signal translation between said first and said second air interfaces.

16. The wireless system of claim 15 wherein, for downlink transmission from said base station, said signal translation by said intermediate RF element encompasses a demodulation of a signal transmitted via said first air interface down to an application signal level and a re-modulation of said application signal level for transmission via said second air interface.

17. The wireless system of claim 15 wherein, for uplink transmission from said end user device, said signal translation by said intermediate RF element encompasses a demodulation of a signal transmitted via said second air interface down to an application signal level and a re-modulation of said application signal level for transmission via said first air interface.

19. The wireless architecture of claim 18 wherein said first air interface is optimized for longer distance transmission and said second air interface is optimized for short distance transmission.

20. The wireless architecture of claim 18 wherein said intermediate RF element provides a protocol conversion between said first air interface and said second air interface.

21. The wireless architecture of claim 18 wherein said signal translation encompasses a demodulation of a signal inbound to said intermediate RF element down to an application signal level and a re-modulation of said application signal level for transmission via an outgoing air interface of said intermediate RF element.

18. A wireless architecture comprising:

a fixed base station operative to establish and maintain a wireless communications path via a first air interface;

an end user device operative to establish and maintain a wireless communications path via a second air interface; and

an intermediate RF element established to communicate with said base station via said first air interface and with said end user device via said second air interface and operative to translate a signal from said first air interface to said second air interface.