Method for transmitting TDD frames with increased data payload

• US 20050281217A1
• Filed: 06/01/2005
• Published: 12/22/2005
• 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
• Granted Patent: US 7,929,467 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• 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 TDD frames with increased data payload” The present invention relates to a method for transmitting through a bidirectional communication channel at least one 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 UL or DL offered by the bidirectional communication channel. The method according to the invention includes: a detection step for detecting at least two successive time slots SLj, SLj+1, SLj+2 allocated to a same direction of communication DL, and a data insertion step DIS for inserting data D in the guard interval G separating such successive time slots SLj, SLj+1, SLj+2. The invention enables to increase the data payload of a frame without requiring an increase of the total duration of the frame itself.

Claims

1. ) Method for transmitting information between at least two transceivers linked together by a bidirectional 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 bidirectional communication channel, method characterized in that it includes the following steps:

a detection step for detecting at least two successive time slots allocated to a same direction of communication, and

a data insertion step for inserting data in the guard interval separating such successive time slots allocated to a same direction of communication.

2. ) Method as claimed in claim 1, further including a width tuning step for 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.

4. ) Method as claimed in any one of claims 1 to 3, further including a resource allocation step for 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. ) Signal carrying at least one frame enclosing information to be transmitted between at least two transceivers and generated by implementing a method as claimed in any one of claims 1 to 4.

3. ) Method as claimed in any one of claims I or 2, according to which, if 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.