Patent ID: 7006529
Filing Date: 2006-02-28
Classification: H04B,H04W

Abstract:
1. A method for arranging communication between terminals (MT 1 –MT 4 ) and an access point (AP 1 , AP 2 ) in a communication system ( 1 ) applying data transmission frames (FR) which comprise at least uplink timeslots (UL) for performing data transmission from the terminals (MT 1 –MT 4 ) to the access point (AP 1 , AP 2 ), and downlink timeslots (DL) for performing data transmission from the access point (AP 1 , AP 2 ) to the terminals (MT 1 –MT 4 ) via a wireless communication channel, and in which method the terminals (MT 1 –MT 4 ) can be allocated one or more timeslots ( 702 – 707 , 802 – 807 ) of said frames, characterized in that in at least part of said frames (FR), at least partly simultaneous timeslots ( 704 – 707 , 802 – 804 ) are allocated to at least two terminals (MT 1 –MT 4 ), wherein in the method, a spatial signature of at least said two terminals (MT 1 –MT 4 ) is determined, that in the method, measurements are taken to estimate timing and frequency offsets and properties of the communication channel, which measurements are taken at least partly on the basis of a signal transmitted by the terminal (MT 1 ) to the access point (AP 1 , AP 2 ), wherein the results of said measurements are used to select the terminals (MT 1 –MT 4 ) to which simultaneous timeslots ( 702 – 707 , 802 – 807 ) are to be allocated, and that during said measurements, an other terminal of the terminals (MT 1 –MT 4 ) communicating with the access point (AP 1 , AP 2 ) does not transmit a signal to said access point (AP 1 , AP 2 ).