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Method for arranging communication between terminals and an access point in a communication system

  • US 20010047424A1
  • Filed: 05/11/2001
  • Published: 11/29/2001
  • Est. Priority Date: 05/12/2000
  • Status: Active Grant
First Claim
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1. A method for arranging communication between terminals (MT1-MT4) and an access point (AP1, AP2) in a communication system (1) applying data transmission frames (FR) which comprise at least uplink time slots (UL) for performing data transmission from the terminals (MT1-MT4) to the access point (AP1, AP2), and downlink time slots (DL) for performing data transmission from the access point (AP1, AP2) to the terminals (MT1-MT4) via a wireless communication channel, and in which method the terminals (MT1-MT4) can be allocated one or more time slots (702-707, 802-807) of said frames, characterized in that in at least part of said frames (FR), at least partly simultaneous time slots (704-707, 802-804) are allocated to at least two terminals (MT1-MT4), wherein in the method, the spatial signature of at least said two terminals (MT1-MT4) is determined, that in the method, measurements are taken to estimate the timing and frequency offsets and the properties of the communication channel, which measurements are taken at least partly on the basis of a signal transmitted by the terminal (MT1) to the access point (AP1, AP2), wherein the results of said measurements are used to select the terminals (MT1-MT4) to which simultaneous time slots (702-707, 802-807) are to be allocated, and that during said measurements, the other terminals (MT1-MT4) communicating with the access point (AP1, AP2) do not transmit a signal to said access point (AP1, AP2).

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