Frequency resource allocation for a narrow-band cellular internet of things system

Patent metadata

Field	Value
Publication number	US-2016249358-A1
Application number	US-201614988878-A
Country	US
Kind code	A1
Filing date	Jan 6, 2016
Priority date	Feb 25, 2015
Publication date	Aug 25, 2016
Grant date	—

Abstract

Improved systems, methods, and apparatuses for allocation of frequency resources, or tones, for a Cellular Internet of Things (CIoT) system are described. In various aspects, interference may be reduced for a CIoT system and an adjacent wireless communications system through identifying a first group of narrowband tones for the CIoT system that will have reduced interference with wideband tone transmissions of the adjacent wireless communications system and may thus support higher power transmissions.

First claim

What is claimed is:

1 . A method of communication at a wireless device, comprising:
identifying a first set of narrowband tones for wireless communications on a first wireless communications network; and identifying a first group of tones from the first set of narrowband tones that support higher power transmissions than a second group of tones of the first set of narrowband tones, the identification based at least in part on an interference level between the first group of tones and a second set of wideband tones for wireless communications on a second wireless communications network.

2 . The method of claim 1 , wherein the first set of narrowband tones comprise a first plurality of tones having a first frequency spacing between adjacent tones in a first available uplink/downlink bandwidth of the first wireless communications network, the second set of wideband tones comprises a second plurality of tones having a second frequency spacing between adjacent tones in a second available uplink/downlink bandwidth of the second wireless communications network, and the second frequency spacing is an integer multiple of the first frequency spacing.

3 . The method of claim 2 , wherein a spacing between frequency carriers of the first wireless communications network and the second wireless communications network is the integer multiple of the first frequency spacing.

4 . The method of claim 2 , wherein the first group of tones comprise tones that generate less interference with tones of the second set of wideband tones relative to the second group of tones of the first set of narrowband tones.

5 . The method of claim 1 , further comprising:
determining that a user equipment (UE) has channel conditions that warrant transmissions on the first group of tones; and transmitting a resource allocation to the UE indicating the first group of tones are allocated for use in uplink transmissions of the UE on the first wireless communications network.

6 . The method of claim 1 , further comprising:
transmitting one or more downlink transmissions to a first UE using higher power transmissions on one or more tones of the first group of tones; and transmitting one or more downlink transmissions to a second UE using lower power transmissions on one or more tones of the second group of tones.

7 . The method of claim 6 , further comprising:
determining that the first UE has channel conditions that indicate higher power transmissions are necessary for reliable communications.

8 . The method of claim 7 , wherein the determining is based at least in part on a latency target for the communications to the first UE and a path loss associated with the first UE.

9 . The method of claim 6 , wherein transmitting the one or more downlink transmissions to the first UE comprises using frequency hopping among tones of the first group of tones.

10 . The method of claim 1 , further comprising:
employing fractional frequency reuse within the second group of tones to identify two or more subsets of the second group of tones; and transmitting downlink communications on the two or more subsets using different powers that are each lower than a transmission power for the first group of tones.

11 . The method of claim 1 , wherein the identifying the first group of tones from the first set of narrowband tones comprises:
receiving a resource allocation from a base station indicating the first group of tones are to be used for uplink transmissions.

12 . The method of claim 11 , further comprising:
transmitting one or more uplink transmissions to the base station on one or more tones of the first group of tones.

13 . The method of claim 12 , further comprising:
transmitting the one or more uplink transmissions to the base station comprises transmitting using frequency hopping among tones of the first group of tones.

14 . The method of claim 1 , further comprising:
receiving a resource allocation from a base station indicating the second group of tones are to be used for uplink transmissions; employing fractional frequency reuse within the second group of tones to identify two or more subsets of the second group of tones; and transmitting uplink communications on the two or more subsets using different powers that are each lower than a transmission power for the first group of tones.

15 . The method of claim 1 , wherein the first set of narrowband tones comprise orthogonal frequency division multiple access (OFDMA) tones and the second set of wideband tones comprise OFDMA tones.

16 . An apparatus for wireless communication at a wireless device, comprising:
means for identifying a first set of narrowband tones for wireless communications on a first wireless communications network; and means for identifying a first group of tones from the first set of narrowband tones that support higher power transmissions than a second group of tones of the first set of narrowband tones, the identification based at least in part on an interference level between the first group of tones and a second set of wideband tones for wireless communications on a second wireless communications network.

17 . The apparatus of claim 16 , wherein the first set of narrowband tones comprise a first plurality of tones having a first frequency spacing between adjacent tones in a first available uplink/downlink bandwidth of the first wireless communications network, the second set of wideband tones comprises a second plurality of tones having a second frequency spacing between adjacent tones in a second available uplink/downlink bandwidth of the second wireless communications network, and the second frequency spacing is an integer multiple of the first frequency spacing.

18 . The apparatus of claim 16 , further comprising:
means for determining that a user equipment (UE) has channel conditions that warrant transmissions on the first group of tones; and means for transmitting a resource allocation to the UE indicating the first group of tones are allocated for use in uplink transmissions of the UE on the first wireless communications network.

19 . An apparatus for communication at a wireless device, comprising:
a processor; memory in electronic communication with the processor; and instructions stored in the memory; wherein the instructions are executable by the processor to:
identify a first set of narrowband tones for wireless communications on a first wireless communications network; and
identify a first group of tones from the first set of narrowband tones that support higher power transmissions than a second group of tones of the first set of narrowband tones, the identification based at least in part on an interference level between the first group of tones and a second set of wideband tones for wireless communications on a second wireless communications network.

20 . The apparatus of claim 19 , wherein the first set of narrowband tones comprise a first plurality of tones having a first frequency spacing between adjacent tones in a first available uplink/downlink bandwidth of the first wireless communications network, the second set of wideband tones comprises a second plurality of tones having a second frequency spacing between adjacent tones in a second available uplink/downlink bandwidth of the second wireless communications network, and the second frequency spacing is an integer multiple of the first frequency spacing.

21 . The apparatus of claim 20 , wherein a spacing between frequency carriers of the fir

Assignees

• Qualcomm Inc

Inventors

• Li Junyi
• Abedini Navid
• Wang Xiao Feng

Classifications

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04L5/0062 Primary

  Avoidance of ingress interference, e.g. ham radio channels · CPC title

• H04L5/0073 Primary

  Allocation arrangements that take into account other cell interferences · CPC title

• H04L5/0066

  Requirements on out-of-channel emissions · CPC title

• H04L5/0007

  the frequencies being orthogonal, e.g. OFDM(A) or DMT · CPC title