METHOD AND APPARATUS FOR WIRELESS COMMUNICATION

• US 20160164622A1
• Filed: 07/25/2014
• Published: 06/09/2016
• Est. Priority Date: 07/25/2013
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Yi, Yunjung, Kim, Byounghoon, AHN, Joonkui, Seo, Dongyoun
• Granted Patent: US 9,819,433 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 7/2656 for structure of frame, burst
• CPC Class Codes: H04J 3/1694 Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers Passive Optical Networks H04Q11/0062
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0032 Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04L 5/143 for modulated signals H04L5/1469 takes precedence
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04L 5/16 Half-duplex systems; Simplex/duplex switching; Transmission of break signals non-automatically inverting the direction of transmission

Abstract

A method and an apparatus for wireless communication is provided. The apparatus configured for time division multiplex (TDM) between time division duplex (TDD) and frequency division duplex (FDD), comprises a radio frequency (RF) unit for transmitting and receiving a radio signal, and a processor operatively coupled to the RF unit, wherein the processor is configured for transmitting signals via the RF unit based on a scheduling for UL and/or DL, wherein the RF unit receives signal from at least one cell and transmits signal to at least one cell with carrier aggregation, and wherein the processor performs single transmission of signal on uplink and single reception of signal on downlink at one subframe via the RF unit.

Claims

1. An user equipment (UE) configured for time division multiplex (TDM) between time division duplex (TDD) and frequency division duplex (FDD), the UE comprising:

a radio frequency (RF) unit for transmitting and receiving a radio signal; and

a processor operatively coupled to the RF unit, wherein the processor is configured for transmitting signals via the RF unit based on a scheduling for UL and/or DL,

wherein the RF unit receives signal from at least one cell and transmits signal to at least one cell with carrier aggregation, and

wherein the processor performs single transmission of signal on uplink and single reception of signal on downlink at one subframe via the RF unit.

2. The UE of claim 1, wherein the processor performs single transmission of signal on uplink and single reception of signal on downlink at one subframe for single component carrier via the RF unit.

3. The UE of claim 1, wherein primary cell (Pcell) is configured with FDD when the UE has half-duplex FDD capability and secondary cell (Scell) is configured with TDD.

4. The UE of claim 1, wherein downlink is shared between FDD downlink subframes and TDD downlink subframes for the UE, and uplink is shared between FDD uplink subframe and TDD uplink subframes for the UE in a TDM manner.

5. The UE of claim 4, wherein uplink/downlink is re-configured for PCell after uplink/downlink is configured for SCell or SCell is configured.

6. The UE of claim 1, wherein TDD downlink transmission is scheduled based on delay caused by at least one of propagation and frequency switching when transition from TDD to FDD occurred.

9. The UE of claim 1, wherein FDD downlink and FDD uplink are configured for PCell and TDD uplink and FDD downlink are configured for SCell.

10. The UE of claim 1, wherein TDD is configured for PCell and FDD is configured for SCell.

11. The UE of claim 10, wherein the processor adjusts timing of ACK/NACK signal for uplink transmission by backhaul latency between PCell and SCell.

7. The UE of claim 7, wherein PCell is scheduled based on the delay caused by propagation and SCell is scheduled based on the delay caused by frequency switching.

8. The UE of claim 7, wherein the transition between TDD and FDD is performed at special subframe when PCell is unavailable for adjusting the delay.

12. A method of time division multiplex (TDM) between time division duplex (TDD) and frequency division duplex (FDD) by a user equipment (UE), the method comprising:

receiving signal from at least one cell according to the downlink scheduling; and

transmitting signal to at least one cell according to the uplink scheduling,

wherein single transmission of signal is performed on uplink and single reception of signal is performed on downlink at one subframe.

13. The method of claim 12, wherein the processor performs single transmission of signal on uplink and single reception of signal on downlink at one subframe for single component carrier.

14. The method of claim 12, downlink is shared between FDD downlink subframes and TDD downlink subframes for the UE, and uplink is shared between FDD uplink subframe and TDD uplink subframes for the UE.

15. The method of claim 12, wherein TDD downlink transmission is scheduled based on delay caused by at least one of propagation and frequency switching when transition from TDD to FDD occurred.