Wireless repeating method and wireless repeating unit

• US 6,115,369 A
• Filed: 03/09/1998
• Issued: 09/05/2000
• Est. Priority Date: 03/10/1997
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: OKI Electric Industry Company Limited
• Inventors: Oura, Hideto
• Primary Examiner(s): Olms, Douglas W.
• Assistant Examiner(s): VINCENT, DAVID ROBERT
• Application Number:
  US09/037,027
• Time in Patent Office: 911 Days
• Field of Search: 370/276, 370/279, 370/280, 370/293, 370/294, 370/321, 370/337, 370/347
• US Class Current: 370/337
• CPC Class Codes: H04B 7/155 Ground-based stations H04B7/204 takes precedence
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels

Abstract

The object of the present invention is to provide a simple wireless repeating method and a repeater suitable for application to Time Division Multiple Access-Time Division Duplex communication methods. Transmission data transmitted from a base station and a mobile station at different time slots of a frequency for call channel use is received at a call channel receiver, analyzed every time slot at a frame analyzer and stored at a storage part. The data stored at the storage part is then read by a frame configuration unit on the timing of time slots Tb1 and Tb2 allotted to the base station and the mobile station prior to transmission and transmitted from a transmitter at the frequency for call channel use. The mobile station can therefore make calls with the base station with the same procedure regardless of whether or not a repeater is present or absent.

Claims

1. A wireless repeating method, where a wireless communication line is divided with respect to time using a first sub-frame comprising a plurality of time slots and a second sub-frame following said first sub-frame and comprising the same number of time slots as said first sub-frame, for relaying a wireless signal between a first wireless device for transmitting first information using a time slot of said first sub-frame and receiving second information transmitted at a time slot of said second sub-frame corresponding to said transmission time slot and a second wireless device for receiving said first information transmitted from said first wireless device and transmitting said second information to said first wireless device via a wireless repeating unit, comprising the steps of:

(a) allotting Mth time slots of said first and second sub-frames to said first wireless device in such a manner that said first wireless device transmits said first information at said Mth time slot of said first sub-frame and receives said second information at said Mth time slot of said second sub-frame;

(b) allotting Nth time slots of said first and second sub-frames that are different from said Mth time slots to said second wireless device in such a manner that said second wireless device transmits said first information at said Nth time slot of said first sub-frame and receives said second information at said Nth time slot of said second sub-frame;

(c) storing said first information transmitted from said first wireless device at said Mth time slot of said first sub-frame and said second information transmitted from said second wireless device at said Nth time slot of said first sub-frame at said wireless repeating unit; and

(d) reading said held first information and outputting said first information at said Nth time slot of said second sub-frame and reading said held second information and outputting said second information at said Mth time slot of said second sub-frame.

2. The wireless repeating method of claim 1, wherein said wireless communication line employs a single frequency.

3. The wireless repeating method of claim 1, wherein said first sub-frame and said second sub-frame each comprise four time slots.

4. The wireless repeating method of claim 1, wherein one free time slot of said first sub-frame and one free time slot of said second sub-frame are allotted to transmission and receival of control signals between said first wireless device and said second wireless device.

5. A wireless repeating system, where a wireless communication line is divided with respect to time using a first sub-frame comprising a plurality of time slots and a second sub-frame following said first sub-frame and comprising the same number of time slots as said first sub-frame, with a wireless signal being relayed between a first wireless device for transmitting first information using a time slot of said first sub-frame and receiving second information transmitted at a time slot of said second sub-frame corresponding to said transmission time slot and a second wireless device for receiving said first information transmitted from said first wireless device and transmitting said second information to said first wireless device via a wireless repeating unit,

wherein said first wireless device is allotted with Mth time slots of said first and second sub-frames in such a manner as to transmit said first information at said Mth time slot of said first sub-frame and receive said second information at said Mth time slot of said second sub-frame;

said second wireless device is allotted with Nth time slots of said first and second sub-frames that are different from said Mth time slots in such a manner as to transmit said first information at said Nth time slot of said first sub-frame and receive said second information at said Nth time slot of said second sub-frame; and

said wireless repeating unit is for storing said first information transmitted from said first wireless device at said Mth time slot of said first sub-frame and said second information transmitted from said second wireless device at said Nth time slot of said first sub-frame and reading said held first information and outputting said first information at said Nth time slot of said second sub-frame and reading said held second information and outputting said second information at said Mth time slot of said second sub-frame.

6. The wireless repeating system of claim 5, wherein said wireless communication line employs a single frequency.

7. The wireless repeating system of claim 5, wherein said first sub-frame and said second sub-frame each comprise four time slots.

8. The wireless repeating system of claim 5, wherein one free time slot of said first sub-frame and one free time slot of said second sub-frame are allotted to transmission and receival of control signals between said first wireless device and said second wireless device.

9. A repeater, where a wireless communication line is divided with respect to time using a first sub-frame comprising a plurality of time slots and a second sub-frame following said first sub-frame and comprising the same number of time slots as said first sub-frame, for relaying a wireless signal between a first wireless device for transmitting first information using a time slot of said first sub-frame and receiving second information transmitted at a time slot of said second sub-frame corresponding to said transmission time slot and a second wireless device for receiving said first information transmitted from said first wireless device and transmitting said second information to said first wireless device, said repeater comprising:

a receiver for receiving information of said first sub-frame of said wireless communication line;

a storage part for storing said first information, of information received at said receiver, transmitted from said first wireless device at an Mth time slot of said first sub-frame and said second information transmitted from said second wireless device at an Nth (where N≠

M) time slot of said first sub-frame;

a transmission controller for reading said first information stored in said storage part and outputting said first information at said Nth time slot of said second sub-frame and reading out said second information stored in said storage part and outputting said second information at said Mth time slot of said second sub-frame; and

a transmitter for transmitting said first and second information outputted from said transmission controller via said wireless communication line.

10. The repeater of claim 9, wherein said wireless communication line employs a single frequency.

11. The repeater of claim 9, wherein said first sub-frame and said second sub-frame each comprise four time slots.

12. The repeater of claim 9, wherein one free time slot of said first sub-frame and one free time slot of said second sub-frame are allotted to transmission and receival of control signals between said first wireless device and said second wireless device.