METHOD AND APPARATUS FOR DATA-SPLITTING TRANSMISSION FROM MULTIPLE SITES
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Abstract
Methods and apparatus for changing cell range coverage are disclosed. The coverage may be changed on a per-sub-frame basis. An antenna beam elevation tilting angle may be adjusted to provide different effective downlink (DL) coverage. For example, a subframe may be a small tilt subframe or a large tilt subframe. A network or evolved NodeB (eNB) may determine data channel transmission power to adjust cell range per subframe. Low Power Subframe (LPS) may be used alone or with Almost Blank Subframe (ABS) to transmit data. Timing Advance (TA) handling for uplink (UL) transmissions is described. A common TA (CTA) may be determined for multi-site UL signaling. UL power control may be determined for UL transmission to multiple sites. Radio Link Monitoring (RLM) may be performed for multiple sites on a carrier frequency. A wireless transmit/receive unit (WTRU) may maintain synchronization in selected subframes for multiple cells.
110 Citations
33 Claims
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1-18. -18. (canceled)
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19. A method for use in an evolved NodeB (eNB), the method comprising:
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receiving load indication information from at least one other eNB; transmitting a set of power boosting parameters to a wireless transmit/receive unit (WTRU), wherein the set of power boosting parameters includes a power ratio between a low power subframe (LPS) and a non-LPS; receiving channel quality information from the WTRU during a first subframe, wherein the channel quality information is based at least on the power ratio, and wherein the WTRU is located at a cell-edge of the eNB and the at least one other eNB; and transmitting data to the WTRU at a predetermined transmission power during a second subframe, wherein the transmitting is based at least on the load indication information and the received channel quality information such that the transmission at the predetermined transmission power is coordinated with the at least one other eNB to not interfere with transmissions from the at least one other eNB to the WTRU. - View Dependent Claims (20, 21, 22, 23)
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24. An evolved NodeB (eNB) comprising:
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a receiver configured to receive load indication information from at least one other eNB; a transmitter configured to transmit a set of power boosting parameters to a wireless transmit/receive unit (WTRU), wherein the set of power boosting parameters includes a power ratio between a low power subframe (LPS) and a non-LPS; the receiver further configured to receive channel quality information from the WTRU during a first subframe, wherein the channel quality information is based at least on the power ratio, and wherein the WTRU is located at a cell-edge of the eNB and the at least one other eNB; and the transmitter further configured to transmit data to the WTRU at a predetermined transmission power during a second subframe, wherein the transmitting is based at least on the load indication information and the received channel quality information such that the transmission at the predetermined transmission power is coordinated with the at least one eNB to not interfere with transmissions from the at least one other eNB to the WTRU. - View Dependent Claims (25, 26, 27, 28)
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29. A method for use in a wireless transmit/receive unit (WTRU), the method comprising:
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receiving a set of power boosting parameters from an evolved NodeB (eNB), wherein the set of power boosting parameters includes a power ratio between a low power subframe (LPS) and a non-LPS; transmitting channel quality information to the eNB during a first subframe, wherein the channel quality information is based at least on the power ratio, and wherein the WTRU is located at a cell-edge of the eNB and at least one other eNB; and receiving data from the eNB at a predetermined transmission power during a second subframe, wherein the receiving is based at least on load indication information received by the eNB from at least one other eNB and the received channel quality information such that the reception at the predetermined transmission power is coordinated with the at least one other eNB to not interfere with transmissions from the at least one other eNB to the WTRU. - View Dependent Claims (30, 31, 32, 33)
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Specification