Method and apparatus for transmitting reference signals in communication systems
First Claim
1. A method for transmitting Reference Signals (RS) that are scrambled with parts of a common scrambling sequence to User Equipments (UEs) by a Node B and a Relay Node (RN) in a communication system, the method comprising the steps of:
- transmitting RS by the Node B in a first set of transmission instances; and
transmitting RS by the RN in a second set of transmission instances, where in the first set and the second set do not have any common transmission instances, wherein the second set of transmission instances is signaled to the RN by the Node B.
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Abstract
Methods and apparatus are described for a Relay Node (RN) that is transparent to User Equipments to transmit, together with a base station (Node B), Reference Signals (RS) to UEs, to receive RS from UEs, to perform transmissions of Transport Blocks (TBs) to the Node B or to UEs and receptions of TBs from the Node B or from UEs, where the transmissions of TBs from the RN are for retransmissions associated with a Hybrid Automatic Repeat reQuest (HARQ) process for the same TBs, and enabling the Node B to obtain control information signaled from UEs while signaling from the RN interferers with that signaling of control information.
13 Citations
22 Claims
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1. A method for transmitting Reference Signals (RS) that are scrambled with parts of a common scrambling sequence to User Equipments (UEs) by a Node B and a Relay Node (RN) in a communication system, the method comprising the steps of:
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transmitting RS by the Node B in a first set of transmission instances; and transmitting RS by the RN in a second set of transmission instances, where in the first set and the second set do not have any common transmission instances, wherein the second set of transmission instances is signaled to the RN by the Node B. - View Dependent Claims (2, 3, 4)
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5. A method for transmitting Reference Signals (RS) that are scrambled with parts of a common scrambling sequence to User Equipments (UEs) by a Node B and a Relay Node (RN) in a communication system, the method comprising the steps of:
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transmitting RS by the Node B in a first set of transmission instances; and transmitting RS by the RN in a second set of transmission instances, wherein the second set is a subset of the first set, wherein the second set of transmission instances is signaled to the RN by the Node B. - View Dependent Claims (6, 7, 8)
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9. A method for transmitting same Transport Block (TB) to a User Equipment (UE) or a Node B by one of a Node B and a User Equipment (UE) and a Relay Node (RN) in a communication system, respectively, the method comprising the steps of:
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transmitting by one of the Node B and the UE the TB for a first number of transmission associated with a Hybrid Automatic Repeat request (HARQ) process number; and transmitting by the RN the TB for a second number of transmissions associated with the HARQ process number wherein the second number of transmissions is smaller than the first number of transmissions, wherein the second number of transmissions is configured to the RN by the Node B or is a fixed number defined in operation of the communication system.
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10. A method for transmitting a Transport Block (TB) by a Relay Node (RN) to a first Node for retransmissions associated with a reference Hybrid Automatic Repeat reQuest (HARQ) process number, where an initial transmission of the TB to the UE for the reference HARQ process number was performed by a second Node, the method comprising the steps of:
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receiving by the RN a first Scheduling Assignment (SA) transmitted from a Node B in a first Transmission Time Interval (TTI); receiving by the RN the initial transmission of the TB from the second Node for the reference HARQ process number in a second TTI; receiving by the RN a second SA transmitted from the Node B in a third TTI that configures a transmission from the RN to the first Node for a retransmission of the TB for the reference HARQ process number; transmitting from the Node B to a User Equipment (UE) a third SA in a fourth TTI that configures a transmission from the second Node to the first Node in a fifth TTI for the retransmission of the TB for the reference HARQ process number; and transmitting by the RN to the first Node in the fifth TTI the retransmission of the TB for the reference HARQ process number in accordance with the second SA. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. An apparatus for transmitting Reference Signals (RS) that are scrambled with parts of a common scrambling sequence to User Equipments (UEs) by a Node B and a Relay Node (RN) in a communication system, the apparatus comprising:
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a first transmitter for transmitting RS by the Node B in a first set of transmission instances; and a second transmitter for transmitting RS by the RN in a second set of transmission instances, wherein the first set and the second set do not have any common transmission instances, wherein the second set of transmission instances is signaled to the RN by the Node B. - View Dependent Claims (20, 21, 22)
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Specification