Method for arranging communication between terminals and an access point in a communication system
First Claim
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).
2 Assignments
0 Petitions
Accused Products
Abstract
The invention relates to 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). The data frames (FR) 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. In the method, the terminals (MT1-MT4) can be allocated one or more time slots (702-707, 802-807) of said frames. In the method, the spatial signature of at least said two terminals (MT1-MT4) is determined, and 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). In the method, measurements are also 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. 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).
-
Citations
48 Claims
- 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).
-
37. A communication system (1) comprising at least an access point (AP1, AP2) and terminals (MT1-MT4), means (8, 15) for data transmission between the terminals (MT1-MT4) and the access point (AP1, AP2), in which communication data transmission frames (FR) are arranged to be used, comprising at least uplink time slots (UL) for data transmission from the terminals (MT1-MT4) to the access point (AP1, AP2), and downlink time slots (DL) for data transmission from the access point (AP1, AP2) to the terminals (MT1-MT4) via a wireless communication channel (CH), and which communication system (1) comprises means (18) for allocating one or more time slots (702-707, 802-807) of said frames to the terminals (MT1-MT4), characterized in that the communication system (1) also comprises:
-
means (18, 19) for allocated at least partly overlapping time slots (704-707, 802-807) to at least two terminals (MT1-MT4) in at least part of said frames (FR), means (ES) for determining the spatial signature of at least said two terminals (MT1-MT4), means (RX) for taking measurements for estimating the timing and frequency offsets of the terminal (MT1-MT4) and the properties of the communication channel at least partly on the basis of the signal transmitted by the terminal (MT1) to the access point (AP1, AP2), means (19) for selecting the terminals (MT1-MT4) which are allocated overlapping time slots (702-707, 802-807), in which selection the results of said measurements are arranged to be used, and means (18) for preventing transmission to the access point (AP1, AP2) by other terminals (MT2-MT4) communicating with the access point (AP1, AP2) during said measurements.
-
-
38. An access point (AP1, AP2) comprising means (15) for data transmission between terminals (MT1-MT4) and the access point (AP1, AP2) in a communication system (1), in which data transmission data transmission frames (FR) are arranged to be used, comprising at least uplink time slots (UL) for data transmission from the terminals (MT1-MT4) to the access point (AP1, AP2), and downlink time slots (DL) for data transmission from the access point (AP1, AP2) to the terminals (MT1-Mt4) via a wireless communication channel (CH), and which communication system (1) comprises means (18) for allocating one or more time slots (702-707, 802-807) of said frames to the terminals (MT1-MT4), characterized in that the access point (AP1, AP2) also comprises:
-
means (18, 19) for allocated at least partly overlapping time slots (704-707, 802-807) to at least two terminals (MT1-MT4) in at least part of said frames (FR), means (ES) for determining the spatial signature of at least said two terminals (MT1-MT4), means (RX) for taking measurements for estimating the timing and frequency offsets of the terminal (MT1-MT4) and the properties of the communication channel at least partly on the basis of the signal transmitted by the terminal (MT1) to the access point (AP1, AP2), means (19) for selecting the terminals (MT1-MT4) which are allocated overlapping time slots (702-707, 802-807), in which selection the results of said measurements are arranged to be used, and means (18) for preventing transmission to the access point (AP1, AP2) by other terminals (MT2-MT4) communicating with the access point (AP1, AP2) during said measurements. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
-
Specification