Abstract
The present invention relates to a method for configuring a retransmission protocol on the uplink between a network node and a relay node in a mobile communication system, the configuration being performed at a network node or at a relay node, and to the corresponding relay node apparatus and network node apparatus capable of configuring the retransmission protocol. In particular, the number of transmission processes is determined based on the position of time intervals available for the transmission and may be selected in order to control the round trip time of the retransmission protocol. Once the number of transmission processes has been configured, the transmission processes are mapped on the available time intervals in a predefined order and repetitively.
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4G,3G | 05/08/2013 | ISLD-201309-038 | PANASONIC CORP | No | Family Member | ||||
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Technologies
Product
Use Cases
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Claim
1. A communication apparatus comprising:
a transmitter which, in operation, transmits an indicator that indicates a number of HARQ processes, wherein the HARQ process is a processing unit of Hybrid Automatic Repeat Request (HARQ); and a receiver which, in operation, receives a frame including a plurality of subframes on which the indicated number of HARQ processes are mapped; wherein the transmitter, in operation, retransmits data according to the HARQ.
2. The communication apparatus according to claim 1, which is an eNodeB, wherein the transmitter of the eNodeB transmits the indicator in a backhaul downlink subframe, which has a corresponding backhaul uplink subframe that is the fourth subframe after the backhaul downlink subframe.
3. The communication apparatus according to claim 1, wherein the number of HARQ processes is selected by an upper layer as a smallest number among numbers of HARQ processes having a roundtrip time that is larger than a minimum system round trip time, wherein the roundtrip time is a transmission time interval between two consecutive transmission opportunities for the same HARQ process.
4. The communication apparatus according to claim 1, which is an eNodeB, wherein the receiver of the eNodeB receives the HARQ as an uplink repeat request from a relay node.
5. A communication method comprising:
transmitting an indicator that indicates a number of HARQ processes, wherein the HARQ process is a processing unit of Hybrid Automatic Repeat Request (HARQ); receiving a frame including a plurality of subframes on which the indicated number of HARQ processes are mapped; and retransmitting data according to the HARQ.
6. The communication method according to claim 5, wherein the indicator is transmitted from an eNodeB in a backhaul downlink subframe, which has a corresponding backhaul uplink subframe that is the fourth subframe after the backhaul downlink subframe.
7. The communication method according to claim 5, wherein the number of HARQ processes is selected by an upper layer as a smallest number among numbers of HARQ processes having a roundtrip time that is larger than a minimum system round trip time, wherein the roundtrip time is a transmission time interval between two consecutive transmission opportunities for the same HARQ process.
8. The communication method according to claim 5, wherein the HARQ is an uplink repeat request from a relay node to an eNodeB.
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