METHOD AND APPARATUS OF MASTER INFORMATION BLOCK (MIB) ACQUISITION UPON HANDOVER
First Claim
1. A method by a terminal for performing a random access procedure upon handover in a wireless communication system, the method comprising:
- identifying at least one of whether timing of a target cell is available or whether a physical random access channel (PRACH) association period is greater than one radio frame;
determining whether to initiate a random access procedure on the target cell before receiving and decoding a physical broadcast channel (PBCH) of the target cell based on the identification; and
performing the random access procedure based on the determination.
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Accused Products
Abstract
A communication method and a system for converging a fifth generation (5G) communication system for supporting higher data rates beyond a fourth generation (4G) system with a technology for Internet of things (IoT) are provided. The communication method and system include intelligent services based on the 5G communication technology and the IoT-related technology. A method by a terminal for performing a random access procedure upon handover in a wireless communication system is provided. The method comprises identifying at least one of whether timing of a target cell is available or whether a physical random access channel (PRACH) association period is greater than one radio frame, determining whether to initiate a random access procedure on the target cell before receiving and decoding a physical broadcast channel (PBCH) of the target cell based on the identification, and performing the random access procedure based on the determination.
2 Citations
20 Claims
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1. A method by a terminal for performing a random access procedure upon handover in a wireless communication system, the method comprising:
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identifying at least one of whether timing of a target cell is available or whether a physical random access channel (PRACH) association period is greater than one radio frame; determining whether to initiate a random access procedure on the target cell before receiving and decoding a physical broadcast channel (PBCH) of the target cell based on the identification; and performing the random access procedure based on the determination.
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2. The method of claim 1, further comprising:
initiating the random access procedure without receiving and decoding the PBCH, based on the timing of the target cell being available.
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3. The method of claim 1, further comprising:
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receiving a PBCH demodulation reference signal (DMRS) of the target cell to obtain a half frame timing index, based on the PRACH association period being shorter than one radio frame; and initiating the random access procedure based on the half frame timing index before receiving and decoding the PBCH.
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4. The method of claim 1, further comprising:
identifying whether a frequency band of the target cell is less than 3 GHz.
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5. The method of claim 4, further comprising:
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receiving a PBCH demodulation reference signal (DMRS) of the target cell to obtain a half frame timing index, based on the PRACH association period being shorter than one radio frame and the frequency band of the target cell being less than 3 GHz; and initiating the random access procedure based on the half frame timing index before receiving and decoding the PBCH.
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6. The method of claim 1, further comprising:
identifying whether a PRACH configuration period is greater than one radio frame.
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7. The method of claim 6, further comprising:
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receiving a PBCH demodulation reference signal (DMRS) of the target cell to obtain a half frame timing index, based on the PRACH association period and the PRACH configuration period being shorter than one radio frame; and initiating the random access procedure based on the half frame timing index before receiving and decoding the PBCH.
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8. The method of claim 1, further comprising:
identifying whether the target cell is a time division duplex (TDD) cell and a TDD uplink and downlink (UL/DL) pattern is not same in each radio frame of the target cell.
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9. The method of claim 8, further comprising:
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receiving a PBCH demodulation reference signal (DMRS) of the target cell to obtain a half frame timing index, based on the PRACH association period being shorter than one radio frame, and based on the target cell being a frequency division duplex (FDD) cell or the TDD UL/DL pattern being same in each radio frame of the target cell; and initiating the random access procedure based on the half frame timing index before receiving and decoding the PBCH.
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10. The method of claim 1, further comprising:
receiving a radio resource control (RRC) reconfiguration message including parameters for synchronous reconfiguration to the target cell.
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11. A terminal in a wireless communication system, the terminal comprising:
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a transceiver; and at least one processor coupled with the transceiver and configured to; identify at least one of whether timing of a target cell is available or whether a physical random access channel (PRACH) association period is greater than one radio frame, determine whether to initiate a random access procedure on the target cell before receiving and decoding a physical broadcast channel (PBCH) of the target cell based on the identification, and perform the random access procedure based on the determination.
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12. The terminal of claim 11, wherein the at least one processor is further configured to initiate the random access procedure without receiving and decoding the PBCH, based on the timing of the target cell being available.
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13. The terminal claim 11, wherein the at least one processor is further configured to:
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control the transceiver to receive a PBCH demodulation reference signal (DMRS) of the target cell to obtain a half frame timing index, based on the PRACH association period being shorter than one radio frame, and initiate the random access procedure based on the half frame timing index before receiving and decoding the PBCH.
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14. The terminal of claim 11, wherein the at least one processor is further configured to identify whether a frequency band of the target cell is less than 3 GHz.
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15. The terminal of claim 14, wherein the at least one processor is further configured to:
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control the transceiver to receive a PBCH demodulation reference signal (DMRS) of the target cell to obtain a half frame timing index, based on the PRACH association period being shorter than one radio frame and the frequency band of the target cell being less than 3 GHz, and initiate the random access procedure based on the half frame timing index before receiving and decoding the PBCH.
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16. The terminal of claim 11, wherein the at least one processor is further configured to identify whether a PRACH configuration period is greater than one radio frame.
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17. The terminal of claim 16, wherein the at least one processor is further configured to:
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control the transceiver to receive a PBCH demodulation reference signal (DMRS) of the target cell to obtain a half frame timing index, based on the PRACH association period and the PRACH configuration period being shorter than one radio frame, and initiate the random access procedure based on the half frame timing index before receiving and decoding the PBCH.
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18. The terminal of claim 11, wherein the at least one processor is further configured to identify whether the target cell is a time division duplex (TDD) cell and a TDD uplink and downlink (UL/DL) pattern is not same in each radio frame of the target cell.
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19. The terminal of claim 18, wherein the at least one processor is further configured to:
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control the transceiver to receive a PBCH demodulation reference signal (DMRS) of the target cell to obtain a half frame timing index, based on the PRACH association period being shorter than one radio frame, and based on the target cell being a frequency division duplex (FDD) cell or the TDD UL/DL pattern being same in each radio frame of the target cell, and initiate the random access procedure based on the half frame timing index before receiving and decoding the PBCH.
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20. The terminal of claim 11, wherein the at least one processor is further configured to:
control the transceiver to receive a radio resource control (RRC) reconfiguration message including parameters for synchronous reconfiguration to the target cell.
Specification