METHOD AND APPARATUS FOR COMMUNICATION IN LTE SYSTEM ON UNLICENSED SPECTRUM

• US 20200137788A1
• Filed: 06/12/2018
• Published: 04/30/2020
• Est. Priority Date: 06/13/2017
• Status: Abandoned Application

• Current Assignee: Apple Inc.
• Original Assignee: Intel IP Corporation (Intel Corporation)
• Inventors: Chang, Wenting, Niu, Huaning, Talarico, Salvatore, Zhang, Jinnian
• Application Number:
  US16/483,561
• Publication Number:
  US 20200137788A1
• Time in Patent Office: Days
• CPC Class Codes: H04L 27/0006 Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio for spectrum sharing between different networks H04W16/14
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0012 Hopping in multicarrier systems for frequency hopping in spread spectrum systems H04B1/713
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/0808 using carrier sensing, e.g. carrier sense multiple access [CSMA]

Abstract

Provided herein are method and apparatus for communication in LTE system on unlicensed spectrum. An apparatus for a user equipment (UE) may include: circuitry configured to: detect a presence detection reference signal for a channel having a dwell period on an unlicensed spectrum; and determine a location of a starting subframe for a physical downlink control channel (PDCCH) in the dwell period based on detection of the presence detection reference signal; and a memory to store the location of the starting subframe. In some embodiments of the present disclosure, the dwell period is fixed. In some embodiments, the dwell period comprises a fixed downlink dwell period and a fixed uplink dwell period.

Claims

1-25. -25. (canceled)

26. An apparatus for a user equipment (UE), comprising:

circuitry to;

detect a presence detection reference signal for a channel having a dwell period on an unlicensed spectrum; and

determine a location of a starting subframe for a physical downlink control channel (PDCCH) in the dwell period based on detection of the presence detection reference signal; and

a memory to store the location of the starting subframe.

27. The apparatus of claim 26, wherein the location of the starting subframe for the PDCCH is floating.

28. The apparatus of claim 26, wherein the location of the starting subframe for the PDCCH is N subframes after the presence detection reference signal, wherein N is a positive integer.

29. The apparatus of claim 26, wherein the circuitry is to:

decode the PDCCH and one or more repetitions of the PDCCH, wherein the PDCCH is received at the location and the one or more repetitions of the PDCCH are received M subframes after the PDCCH, wherein M is a positive integer.

30. The apparatus of claim 29, wherein the circuitry is to:

drop repetitions of the PDCCH that are in another channel.

31. The apparatus of claim 26, wherein a starting Orthogonal Frequency Division Multiplexing (OFDM) symbol for the PDCCH is the first OFDM symbol within the starting subframe.

32. The apparatus of claim 26, wherein the circuitry is to:

disable frequency hopping for the PDCCH within the channel.

33. The apparatus of claim 29, wherein the circuitry is to:

decode a physical downlink share channel (PDSCH) associated with the PDCCH, wherein the PDSCH is received in a subframe immediately following an ending subframe of a last one of the one or more repetition of the PDCCH.

34. The apparatus of claim 33, wherein the circuitry is to:

disable frequency hopping for the PDSCH within the channel.

35. The apparatus of claim 33, wherein the circuitry is to:

decode one or more repetitions of the PDSCH, wherein the one or more repetitions of the PDSCH is received in the channel.

36. The apparatus of claim 35, wherein the number of the one or more repetitions of the PDSCH is configured by an access node.

37. The apparatus of claim 36, wherein the one or more repetitions of the PDSCH are received in contiguous subframes or non-contiguous subframes.

38. The apparatus of claim 35, wherein the circuitry is to:

drop repetitions of the PDSCH that are in another channel.

39. An apparatus for an access node, comprising:

circuitry to;

perform listen before talk (LBT) procedure for a channel having a dwell period on an unlicensed spectrum to detect whether the channel is available;

generate a presence detection reference signal, for transmission when the channel is detected to be available; and

configure a location of a starting subframe for a physical downlink control channel (PDCCH) in the dwell period based on the transmission of the presence detection reference signal; and

a memory to store the location of the starting subframe.

40. The apparatus of claim 39, wherein the circuitry is to:

configure a location of a starting subframe for a physical uplink share channel (PUSCH) associated with the PDCCH, for transmission by a user equipment (UE) W subframes after reception of the PDCCH, wherein W is a positive integer.

41. The apparatus of claim 40, wherein the circuitry is to:

configure the W via downlink channel information (DCI).

42. The apparatus of claim 40, wherein the circuitry is to:

disable frequency hopping for the PUSCH within the channel.

43. The apparatus of claim 40, wherein the circuitry is to:

configure location of subframes for one or more repetitions of the PUSCH, for transmission in non-contiguous subframes by the UE.

44. The apparatus of claim 40, wherein the circuitry is to:

configure location of subframes for one or more repetitions of the PUSCH, for transmission in another channel by the UE.

45. The apparatus of claim 39, wherein the dwell period is fixed.

46. The apparatus of claim 45, wherein the dwell period comprises a fixed downlink dwell period and a fixed uplink dwell period.

47. The apparatus of claim 40, wherein the circuitry is to:

decode the PUSCH that is transmitted in unit of a predefined number of contiguous subframes.

48. The apparatus of claim 47, wherein the predefined number is 5.

49. The apparatus of claim 39, wherein the circuitry is to:

perform channel switching from the channel to another channel at a first subframe temporally of dwell period of the another channel.

50. The apparatus of claim 49, wherein the circuitry is to:

perform the channel switching at first two Orthogonal Frequency Division Multiplexing (OFDM) symbols temporally of the first subframe.