Method for transmitting TDD frames with increased data payload

• US 7,929,467 B2
• Filed: 06/01/2005
• Issued: 04/19/2011
• Est. Priority Date: 06/17/2004
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Mottier, David
• Primary Examiner(s): Pham; Chi H
• Assistant Examiner(s): Faroul; Farah
• Application Number:
  US11/140,883
• Publication Number:
  US 20050281217A1
• Time in Patent Office: 2,148 Days
• Field of Search: 370/276, 370/278, 370/464, 370/498, 370/500, 370/280, 370/282, 370/508, 370/528
• US Class Current: 370/280
• CPC Class Codes: H04B 7/2656 for structure of frame, burst
• CPC Class Codes: H04L 5/1492 with time compression, e.g. operating according to the ping-pong technique

Abstract

Method for transmitting through a bidirectional communication channel at least one conventional frame (CVFR) split into time slots SLj (for j=1 to L) separated from each other by guard intervals G, each time slot SLj being allocated either to a first or to a second direction of communication uplink (UL) or downlink (DL) offered by the bidirectional communication channel. The method according to the invention includes: detecting at least two successive time slots SLj, SLm+1, SLj+2 allocated to a same direction of communication DL, and inserting data in the guard interval separating such successive time slots SLj, SLj+1, SLj+2.

Claims

1. Method for transmitting information between at least two transceivers linked together by a bi-directional communication channel, said information being enclosed within at least one frame split into time slots separated from each other by guard intervals having each a predetermined duration, each time slot being allocated either to a first or to a second direction of communication offered by the bi-directional communication channel, the method comprising:

detecting at least two successive time slots allocated to a same direction of communication of the bi-directional communication channel, and

inserting data in the guard interval separating the successive time slots allocated to the same direction of communication.

2. Method as claimed in claim 1, further including adjusting the duration of said guard interval to a total duration required for transmitting a predetermined number of data symbols to be inserted in said guard interval.

3. Method as claimed in any one of claims 1 or 2, according to which, when each slot includes one or more pilot symbols, at least one of said pilot symbols is to be replaced by a data symbol in the course of the data insertion step.

4. Method as claimed in claim 1, further including a optimizing the directional allocation of the slots included in said at least one frame by systematically allocating a given slot to the same direction of communication to which the previous slot has been allocated, unless prevailing traffic constraints require a change of allocation, in which case said given slot will be allocated to a direction of communication opposite to the direction to which the previous slot has been allocated.

5. Method for generating a frame of constant total duration for transmitting information in a bi-directional communication channel, said frame being split into a predefined number of time slots, each time slot being allocated either to a first or a second direction of communication offered by said bi-directional communication channel, the method comprising:

arranging, at a transceiver, a guard interval only between two consecutive timeslots of said frame when said two time slots are allocated to opposite directions of communication; and

adjusting the duration of said guard interval to a total duration for transmitting a multiple number of symbols.

6. Telecommunication system including:

a base station and a mobile terminal,

the mobile terminal configured to transfer in a first direction data to the base station into at least one time slot of a frame of constant total duration,

the base station configured to transfer in a second direction data to the mobile terminal into at least another time slot of the frame, said frame being split into a predefined number of time slots,

the base station configured to arrange a guard interval only between two consecutive timeslots of said frame when said two time slots are allocated to opposite directions of communication, and to adjust the duration of said guard interval to a total duration for transmitting a multiple number of symbols.