Methods and Apparatus for Decoding DL PHY Channels in a Narrow Band System

• US 20180212698A1
• Filed: 03/23/2018
• Published: 07/26/2018
• Est. Priority Date: 09/30/2015
• Status: Abandoned Application

• Current Assignee: HFI Innovation, Inc. (MediaTek, Inc.)
• Original Assignee: MediaTek Singapore Pte. Ltd. (MediaTek, Inc.)
• Inventors: Sun, Feifei, Zhang, Lei, Lin, Kuhn-Chang, Tsai, Jeng-Yi, Li, Xiu-Sheng
• Application Number:
  US15/933,376
• Publication Number:
  US 20180212698A1
• Time in Patent Office: Days
• CPC Class Codes: H04B 1/662 using a time/frequency relationship, e.g. time compression or expansion
• CPC Class Codes: H04B 7/12 Frequency diversity
• CPC Class Codes: H04J 11/0069 Cell search, i.e. determining cell identity [cell-ID] design of multiplexing codes H04J13/00; processing access restriction or access information H04W48/16; discovery of network devices for network data management H04W8/005; sounding signals for channel estimation H04L25/0226; structure of reference signals in multicarrier modulation systems H04L27/2613; frame, time or carrier synchronisation in multicarrier modulation systems H04L27/2655
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/008 once only, on installation
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

Apparatus and methods are provided for decoding DL PHY channels in a narrow band wireless system. In one novel aspect, the UE performs a cell search and determines a first location of a resource block carrying system signals, obtains a second location of a second resource block based on the first resource block, wherein the second resource block includes a format indicator, determines a DL transmission format based on the format indicator, and receives and decodes a first DL physical channel based on the DL transmission format. In one embodiment, the UE operates in either a standalone mode, an in-band mode, or a guard-band mode. The DL transmission format comprises an offset index from a middle/central frequency of the first resource block in the in-band mode or the guard-band mode. In another embodiment, the UE further decodes a second DL physical channel carrying the format indicator.

Claims

1. A method comprising:

retrieving an identification (ID) from a mobile device by a user equipment (UE) in a wireless network;

sending a subscription request to a e-SIM platform, wherein the subscription request includes information of the retrieved ID of the mobile device;

receiving subscription response from the e-SIM platform; and

enabling the mobile device based on the received subscription response.

2. The method of claim 1, wherein the first set of system signals is for cell search.

3. The method of claim 2, wherein the first resource block comprises PSS and SSS, and the second resource block comprises MIB.

4. The method of claim 1, wherein the first resource block comprises PSS, and the second resource block comprises SSS.

5. The method of claim 2, wherein the first resource block comprises PSS and SSS, and the second resource block comprises a signal from a pre-defined set wherein each signal of the predefined set is associated with one DL transmission format.

6. The method of claim 1, wherein obtaining the format indicator on the second resource block by sequence detection within a pre-defined sequence set, where each sequence is associated with one DL transmission format.

7. The method of claim 1, wherein obtaining the format indicator on the second resource block by energy detecting on the second resource block.

8. The method of claim 1, wherein obtaining the format indicator on the second resource block by decoding a second DL channel transmitting carrying system information on the second resource block.

9. The method of claim 1, wherein the DL transmission format includes one or more elements comprising:

an operation mode, a DL carrier spacing, a PRB index, a frame structure, a CP length, a transmission waveform, a pilot format, and an operating bandwidth.

10. The method of claim 9, wherein the operation mode is one predefined format comprising a standalone mode, an in-band mode, and a guard-band mode.

11. The method of claim 9, wherein for the in-band mode, the first resource block carrying the first set of system signal(s) for the first system resides inside a frequency band of a second system.

12. The method of claim 9, wherein for the guard-band mode, the first resource block carrying the first set of system signal(s) for the first system resides in a guard frequency band a second system.

13. The method of claim 9, wherein the operation mode is the in-band mode or the guard-band mode, and wherein the DL transmission format further comprising an offset index from a center frequency of a second system.

14. The method of claim 1, wherein after determining a downlink (DL) transmission format, adjusting the configuration of receiver, and receiving and decoding a first DL physical channel.

15. An user equipment (UE), comprising:

a radio frequency (RF) transceiver that transmits and receives radio signals in the wireless communication network;

a first resource block circuit that obtains a first resource block by performing a cell search, wherein the first resource block carries a first set of system signals;

a second resource block circuit that obtains a second location of a second resource block based on the first resource block, wherein the second resource block includes a format indicator;

a downlink (DL) transmission format circuit that determines a DL transmission format based on the format indicator; and

a physical channel circuit that receives and decodes a DL physical channel based on the DL transmission format.

16. The UE of claim 15, wherein the first resource block comprises PSS and SSS, and the second resource block comprises MIB.

17. The UE of claim 15, wherein the first resource block comprises PSS, and the second resource block comprises SSS.

18. The UE of claim 15, wherein the first resource block comprises PSS and SSS, and the second resource block comprises a predefined signal from a pre-defined set, wherein each signal is associated with a DL transmission format.

19. The UE of claim 15, wherein the DL transmission format includes one or more elements comprising:

an operation mode, a DL carrier spacing, a PRB index, a frame structure, a CP length, a transmission waveform, a pilot format, and an operating bandwidth.

20. The UE of claim 15, wherein the operation mode is one predefined format comprising a standalone mode, an in-band mode, and a guard-band mode.

21. The UE of claim 20, wherein for the in-band mode, the first resource block carrying the first set of system signal(s) for the first system resides inside a frequency band of a second system.

22. The UE of claim 20, wherein for the guard-band mode, the first resource block carrying the first set of system signal(s) for the first system resides in a guard frequency band a second system.

23. The UE of claim 20, wherein the operation mode is the in-band mode or the guard-band mode, and wherein the DL transmission format further comprising an offset index from a center frequency of a second system.