Techniques for supporting relay operation in wireless communication systems
First Claim
1. A method of wireless communication by a relay station, the method comprising:
- communicating with a base station on backhaul subframes and with a user equipment (UE) on access subframes;
selecting an initial access subframe for a packet;
finding a subframe, corresponding to the initial access subframe, for an acknowledge (ACK) of the packet, according to a predefined hybrid automatic retransmission (HARM) time line;
determining whether the corresponding ACK subframe is a backhaul subframe;
incrementing a value of a target termination for the packet if the corresponding ACK subframe is not a backhaul subframe;
selecting a modulation and coding scheme (MCS) for the packet based on the target termination for the packet; and
scheduling a transmission of the packet on the initial access subframe according to the selected MCS.
1 Assignment
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Accused Products
Abstract
Techniques for supporting operation of relay stations in wireless communication systems are described. In an aspect, a base station may transmit data to a relay station in a portion of a subframe instead of the entire subframe. The relay station may transmit control information during part of the subframe. The base station may transmit data to the relay station during the remaining part of the subframe. In another aspect, a target termination for a packet may be selected based on data and/or ACK transmission opportunities available for the packet. One or more transmissions of the packet may be sent with HARQ, and ACK information may be sent for the packet. The packet may be transmitted such that it can be terminated prior to the first subframe (i) not available for sending the packet or (ii) available for sending ACK information.
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Citations
12 Claims
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1. A method of wireless communication by a relay station, the method comprising:
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communicating with a base station on backhaul subframes and with a user equipment (UE) on access subframes; selecting an initial access subframe for a packet; finding a subframe, corresponding to the initial access subframe, for an acknowledge (ACK) of the packet, according to a predefined hybrid automatic retransmission (HARM) time line; determining whether the corresponding ACK subframe is a backhaul subframe; incrementing a value of a target termination for the packet if the corresponding ACK subframe is not a backhaul subframe; selecting a modulation and coding scheme (MCS) for the packet based on the target termination for the packet; and scheduling a transmission of the packet on the initial access subframe according to the selected MCS. - View Dependent Claims (2, 3, 4)
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5. A relay station, comprising:
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a transmitter and a receiver, configured to communicate with a base station on backhaul subframes and with a user equipment (UE) on access subframes; a memory; and at least one processor coupled to the memory and configured to; select an initial access subframe for a packet; find a subframe, corresponding to the initial access subframe, for an acknowledge (ACK) of the packet, according to a predefined hybrid automatic retransmission (HARQ) time line; determine whether the corresponding ACK subframe is a backhaul subframe; increment a value of a target termination for the packet if the corresponding ACK subframe is not a backhaul subframe; select a modulation and coding scheme (MCS) for the packet based on the target termination for the packet; and schedule a transmission of the packet on the initial access subframe according to the selected MCS. - View Dependent Claims (6, 7, 8)
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9. An apparatus, comprising:
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means for communicating with a base station on backhaul subframes and with a user equipment (UE) on access subframes; means for selecting an initial access subframe for a packet; means for finding a subframe, corresponding to the initial access subframe, for acknowledge (ACK) of the packet, according to a predefined hybrid automatic retransmission (HARQ) time line; means for determining whether the corresponding ACK subframe is a backhaul subframe; means for incrementing a value of a target termination for the packet if the corresponding ACK subframe is not a backhaul subframe; means for selecting a modulation and coding scheme (MCS) for the packet based on the target termination for the packet; and means for scheduling a transmission of the packet on the initial access subframe according to the selected MCS. - View Dependent Claims (10)
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11. A non-transitory computer-readable medium having instructions stored thereon, the instructions comprising codes executable to cause an apparatus to:
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communicate with the base station on backhaul subframes and with a user equipment (UE) on access subframes; select an initial access subframe for a packet; find a subframe, corresponding to the initial access subframe, for acknowledge (ACK) of the packet, according to a predefined hybrid automatic retransmission (HARM) time line; determine whether the corresponding ACK subframe is a backhaul subframe; increment a value of a target termination for the packet if the corresponding ACK subframe is not a backhaul subframe; select a modulation and coding scheme (MCS) for the packet based on the target termination for the packet; and schedule a transmission of the packet on the initial access subframe according to the selected MCS. - View Dependent Claims (12)
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Specification