Base station and method for configuring sub-frames for relay-node operations
First Claim
Patent Images
1. A method for base station (eNB) to relay node (RN) (eNB-RN) transmissions in accordance with an orthogonal frequency division multiple access (OFDMA) technique, the method comprising:
- configuring sub-frames in accordance with an uplink-downlink configuration and a subframe configuration for an eNB to RN transmission, each sub-frame comprising slots for transmitting signals within resource blocks, wherein a cyclic prefix (CP) having a predetermined length is appended to each symbol of the sub-frames;
transmitting symbols of the sub-frames that are pre-designated for downlink transmission based on the uplink-downlink configuration and the subframe configuration; and
configuring the subframes in accordance with a slot configuration, the slot configuration to restrict transmissions to a subset of symbols in a slot,wherein the slot configuration indicates a start symbol index and an end symbol index for at least one of a first slot and a second slot of a resource block, andwherein the uplink-downlink configuration and the subframe configuration define a frame structure that indicates which sub-frames of a frame are downlink subframes pre-designated for eNB-RN transmissions and which subframes are uplink subframes pre-designated for RN-eNB transmissions.
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Abstract
A frame structure for support of large delay spread deployment scenarios (e.g., cellular system operation in large cell sizes or low frequency bands) is generally presented. In this regard a method is introduced comprising partitioning a radio frame into a plurality of equal-sized (or non-equal-sized) sub-frames to simplify system implementation. Other embodiments are also disclosed and claimed.
30 Citations
27 Claims
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1. A method for base station (eNB) to relay node (RN) (eNB-RN) transmissions in accordance with an orthogonal frequency division multiple access (OFDMA) technique, the method comprising:
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configuring sub-frames in accordance with an uplink-downlink configuration and a subframe configuration for an eNB to RN transmission, each sub-frame comprising slots for transmitting signals within resource blocks, wherein a cyclic prefix (CP) having a predetermined length is appended to each symbol of the sub-frames; transmitting symbols of the sub-frames that are pre-designated for downlink transmission based on the uplink-downlink configuration and the subframe configuration; and configuring the subframes in accordance with a slot configuration, the slot configuration to restrict transmissions to a subset of symbols in a slot, wherein the slot configuration indicates a start symbol index and an end symbol index for at least one of a first slot and a second slot of a resource block, and wherein the uplink-downlink configuration and the subframe configuration define a frame structure that indicates which sub-frames of a frame are downlink subframes pre-designated for eNB-RN transmissions and which subframes are uplink subframes pre-designated for RN-eNB transmissions. - View Dependent Claims (2)
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3. A method for base station (eNB) to relay node (RN) (eNB-RN) transmissions in accordance with an orthogonal frequency division multiple access (OFDMA) technique, the method comprising:
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configuring sub-frames in accordance with an uplink-downlink configuration and a subframe configuration for an eNB to RN transmission, each sub-frame comprising slots for transmitting signals within resource blocks, wherein a cyclic prefix (CP) having a predetermined length is appended to each symbol of the sub-frames; and transmitting symbols of the sub-frames that are pre-designated for downlink transmission based on the uplink-downlink configuration and the subframe configuration; and determining the uplink-downlink configuration and the subframe configuration from a plurality of an uplink-downlink configurations and a plurality of subframe configurations for the eNB to RN transmission, wherein the uplink-downlink configuration and the subframe configuration define a frame structure that indicates which sub-frames of a frame are downlink subframes pre-designated for eNB-RN transmissions and which subframes are uplink subframes pre-designated for RN-eNB transmissions.
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4. A method for base station (eNB) to relay node (RN) (eNB-RN) transmissions in accordance with an orthogonal frequency division multiple access (OFDMA) technique, the method comprising:
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configuring the sub-frames in accordance with an uplink-downlink configuration and a subframe configuration for an eNB to RN transmission, each sub-frame comprising slots for transmitting signals within resource blocks, wherein a cyclic prefix (CP) having a predetermined length is appended to each symbol of the sub-frames; and transmitting symbols of the sub-frames that are pre-designated for downlink transmission based on the uplink-downlink configuration and the subframe configuration, wherein the uplink-downlink configuration and the subframe configuration define a frame structure that indicates which sub-frames of a frame are downlink subframes pre-designated for eNB-RN transmissions and which subframes are uplink subframes pre-designated for RN-eNB transmissions, and wherein the uplink-downlink configuration and the subframe configuration further indicates which sub-frames of the frame are not pre-designated for RN operations. - View Dependent Claims (5, 6, 7, 8)
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9. A base station configured for relay node (RN) transmissions in accordance with an orthogonal frequency division multiple access (OFDMA) technique, the base station comprising:
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processing circuitry to configure sub-frames in accordance with an uplink-downlink configuration and a subframe configuration for a RN transmission, each subframe comprising slots for transmitting signals within resource blocks, wherein a cyclic prefix (CP) having a predetermined length is appended to each symbol of the sub-frames; and physical-layer circuitry to transmit symbols of the sub-frames that are pre-designated for downlink transmission based on the uplink-downlink configuration and the subframe configuration, wherein the uplink-downlink configuration and the subframe configuration define a frame structure that indicates which sub-frames of a frame are downlink subframes pre-designated for eNB-RN transmissions and which subframes are uplink subframes pre-designated for RN-eNB transmissions, wherein the processing circuitry is to further configure the subframes in accordance with a slot configuration, the slot configuration to restrict transmissions to a subset of symbols in a slot, and wherein the slot configuration indicates a start symbol index and an end symbol index for at least one of a first slot and a second slot of a resource block. - View Dependent Claims (10, 11)
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12. Processing circuitry for configuring sub-frames for base station (eNB) to relay node (RN) (eNB-RN) transmissions in accordance with an orthogonal frequency division multiple access (OFDMA) technique, the processing circuitry comprising:
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circuitry to configure sub-frames in accordance with a slot configuration for an eNB to RN transmission, the slot configuration to restrict transmissions to a subset of symbols in a slot; and
circuitry to configure symbols of the sub-frames for transmission at least in accordance with the slot configuration,wherein the slot configuration indicates a start symbol index and an end symbol index for at least one of a first slot and a second slot of a resource block. - View Dependent Claims (13, 14, 15, 16)
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17. A method for transmissions between a base station and a relay station in accordance with an orthogonal frequency division multiplexing technique, the method comprising:
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configuring sub-frames for transmission of symbols from the base station to the relay station in a wireless wide area network in accordance with an uplink-downlink configuration and a sub-frame configuration, each sub-frame of a frame comprising slots for resource blocks; adding a cyclic prefix to each of the symbols; transmitting the symbols in the sub-frames that are pre-designated for downlink transmission based on the uplink-downlink configuration and the sub-frame configuration, wherein the uplink-downlink configuration and the sub-frame configuration define a frame structure to indicate which sub-frames of the frame are downlink sub-frames pre-designated for base station to relay station transmissions and which sub-frames are uplink sub-frames pre-designated for relay station to base station transmissions; and configuring one or more of the sub-frames to include a subset of the symbols, wherein each slot is limited to either six or seven symbols based on a slot configuration. - View Dependent Claims (18)
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19. A method for transmissions between a base station and a relay station in accordance with an orthogonal frequency division multiplexing technique, the method comprising:
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configuring sub-frames for transmission of symbols from the base station to the relay station in a wireless wide area network in accordance with an uplink-downlink configuration and a sub-frame configuration, each sub-frame of a frame comprising slots for resource blocks; adding a cyclic prefix to each of the symbols; and transmitting the symbols in the sub-frames that are pre-designated for downlink transmission based on the uplink-downlink configuration and the sub-frame configuration, wherein the uplink-downlink configuration and the sub-frame configuration define a frame structure to indicate which sub-frames of the frame are downlink sub-frames pre-designated for base station to relay station transmissions and which sub-frames are uplink sub-frames pre-designated for relay station to base station transmissions, wherein the uplink-downlink configuration and the sub-frame configuration further indicates which sub-frames of the frame are not pre-designated for relay station operations. - View Dependent Claims (20)
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21. A method for transmissions between a base station and a relay station in accordance with an orthogonal frequency division multiplexing technique, the method comprising:
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configuring sub-frames for transmission of symbols from the base station to the relay station in a wireless wide area network in accordance with an uplink-downlink configuration and a sub-frame configuration, each sub-frame of a frame comprising slots for resource blocks; adding a cyclic prefix to each of the symbols; and transmitting the symbols in the sub-frames that are pre-designated for downlink transmission based on the uplink-downlink configuration and the sub-frame configuration, wherein the uplink-downlink configuration and the sub-frame configuration define a frame structure to indicate which sub-frames of the frame are downlink sub-frames pre-designated for base station to relay station transmissions and which sub-frames are uplink sub-frames pre-designated for relay station to base station transmissions, wherein the frame structure further comprises primary synchronization sequences and secondary synchronization sequences to communicate with a legacy terminal and a non-legacy terminal. - View Dependent Claims (22, 23)
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24. Processing circuitry for medium access control layer processing comprising circuitry to configure a frame structure for transmission of signals in a wireless wide area network, the frame structure comprising an idle time sub-frame, an uplink sub-frame, and a downlink sub-frame comprising two slots,
wherein each slot is configured for orthogonal frequency division multiplexing (OFDM) symbols having a cyclic prefix, wherein a number of OFDM symbols in each slot is determined according to a cycle prefix length, wherein the frame structure further comprises primary synchronization sequences and secondary synchronization sequences to communicate with a legacy terminal and a non-legacy terminal, and wherein each slot is limited to either six or seven symbols based in a slot configuration.
Specification