Method of assembling a frame in an orthogonal frequency division multiple access (OFDMA)-based communication system and communication system

摘要

A method of assembling a frame in an Orthogonal Frequency Division Multiple Access (OFDMA)-based communication system, wherein data packets to be transmitted from a broadcast station to a receiver are given a rectangular shape in terms of the two dimensions—time and frequency—of the OFDMA frame, and wherein the data packets are successively fitted into the OFDMA frame by way of a frame assembly scheduler, is characterized in that the filling process of the OFDMA frame is based on an ordered list of data structures that represent the current empty space within the OFDMA frame. Furthermore, a corresponding communication system is disclosed.

主权项

1. A method of assembling a frame in an Orthogonal Frequency Division Multiple Access (OFDMA)-based communication system, comprising:
generating data packets to be transmitted from a broadcast station to a receiver into bursts that include either one of a single data packet or a plurality of concatenated data packets; and filling an OFDMA frame with said bursts, the OFDMA frame having a rectangular shape in terms of two dimensions, the two dimensions being time and frequency, wherein said filling includes performing an evaluation of a rectangular shaping or dimensioning of the bursts in terms of slots and subchannels of the OFDMA frame, and successively fitting said bursts into the OFDMA frame by means of a frame assembly scheduler based on said evaluation, wherein the frame assembly scheduler is configured to perform a filling of the OFDMA frame based on an ordered list of rectangular data structures that represent a current unallocated space within the OFDMA frame, and wherein, in said evaluation, a smallest rectangle of unallocated space, of a plurality of rectangles of unallocated space of the OFDMA frame, that can hold a burst to be allocated, is selected as a packing area for said burst so that a size of a largest rectangle of unallocated space in a remaining defragmented rectangle of unallocated space of the OFDMA frame is maximized.