Subframes in a cellular communications system
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorsDavid Astely, Stefan Parkvall, Per Johan Anders Nystrom
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Abstract
The invention discloses a method for a cellular communications system, in which traffic is sent in frames, each frame comprising a first number of subframes, with a second number of said subframes being available for at least either uplink or downlink traffic. At least one of said second number of subframes is made to comprise at least three parts, as follows: One part which is utilized for uplink traffic, One part which is utilized for downlink traffic, One part which is utilized as a guard period, with said guard period part being scheduled between the uplink and the downlink parts. The duration of at least two of said three parts may be varied to fit the current system need.
Claims22
A radio transceiver comprising:
- a transmitter and a receiver, said transmitter and said receiver being configured to send and receive radio frames, respectively, at least some of said radio frames including at least one downlink subframe which contains downlink traffic but no uplink traffic, at least one uplink subframe which contains uplink traffic, but no downlink traffic and, disposed between said at least one downlink subframe and said at least one uplink subframe, a special subframe, said special subframe consisting of:
- a first part which is utilized for downlink traffic;
- a second part which is utilized as a guard period;
- and
- a third part which is utilized for uplink traffic;
- wherein said guard period of said second part is entirely disposed between the first part and the third part;
- such that a sum of a duration of the first part, the second part and the third part constitute an entire subframe length;
- wherein a duration of at least two of said first part, said second part and said third part may be varied.
A method for transmitting traffic in frames in a cellular communication system, the method comprising:
- dividing said frames into a plurality of subframes, said plurality of subframes including at least one downlink subframe which contains downlink traffic but no uplink traffic, and at least one uplink subframe which contains uplink traffic but no downlink traffic;
- transmitting said at least one downlink subframe and said at least one uplink subframe;
- and
- transmitting, between said at least one downlink subframe and said at least one uplink subframe, a special subframe consisting of:
- a first part which is utilized for downlink traffic;
- a second part which is utilized as a guard period;
- and
- a third part which is utilized for uplink traffic;
- wherein said guard period of said second part is entirely disposed between the first part and the third part;
- such that a sum of a duration of the first part, the second part and the third part constitute an entire subframe length, and wherein a duration of at least two of said first part, said second part and said third part may be varied.
Dependencies are inferred from the claim text.