COVERAGE-DEFICIENT TERMINAL CONNECTION PROCEDURES

• US 20160174083A1
• Filed: 02/10/2014
• Published: 06/16/2016
• Est. Priority Date: 08/01/2013
• Status: Active Grant

• Current Assignee: Lenovo Singapore Pte Limited (Lenovo Group Ltd.)
• Original Assignee: Fujitsu Limited
• Inventors: VIOREL, Dorin G., BUCKNELL, Paul, ITO, Akira
• Granted Patent: US 10,212,573 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/0639 Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 28/04 Error control
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 52/241 taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
• CPC Class Codes: H04W 52/242 taking into account path loss
• CPC Class Codes: H04W 52/243 taking into account interferences
• CPC Class Codes: H04W 56/001 Synchronization between nodes
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0473 the resource being transmission power
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/56 based on priority criteria
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals
• CPC Class Codes: H04W 8/186 Processing of subscriber group data

Abstract

A method may include detecting a synchronization signal from a base station. The method may further include determining a synchronization detection probability based on the detection of the synchronization signal. The method may further include estimating a coverage deficit range based on the synchronization detection probability. The method may further include transmitting coverage deficit signaling configured to indicate the coverage deficit range estimated based on the synchronization detection probability.

Claims

1. A method comprising:

detecting a synchronization signal from a base station;

determining a synchronization detection probability based on the detection of the synchronization signal;

estimating a coverage deficit range based on the synchronization detection probability; and

transmitting coverage deficit signaling configured to indicate the coverage deficit range estimated based on the synchronization detection probability.

2. The method of claim 1, wherein the coverage deficit range is estimated relative to a minimum coverage service level.

3. The method of claim 2, wherein the coverage deficit range is based on a signal-to-interference-and-noise-ratio (SINR) defined relative to a cell edge SINR, the cell edge SINR being associated with a SINR of the minimum coverage service level.

4. The method of claim 1, wherein the synchronization detection probability is correlated to the coverage deficit range via a lookup table.

5. The method of claim 1, wherein the coverage deficit signaling is transmitted via machine-type communication (MTC) physical random access channel (PRACH) resources, the coverage deficit signaling including an MTC PRACH signature reserved for coverage deficit signaling via the MTC PRACH resources.

6. The method of claim 1, wherein the coverage deficit signaling is transmitted via main physical random access channel (PRACH) resources, the coverage deficit signaling including a main PRACH signature reserved for coverage deficit signaling via the main PRACH resources.

7. The method of claim 1, wherein:

the coverage deficit signaling includes first coverage deficit signaling transmitted via machine-type communication (MTC) physical random access channel (PRACH) resources;

the method further comprises transmitting second coverage deficit signaling via main PRACH resources;

the first coverage deficit signaling includes an MTC PRACH signature reserved for coverage deficit signaling via the MTC PRACH resources; and

the second coverage deficit signaling includes a main PRACH signature reserved for the coverage deficit signaling via the main PRACH resources.

8. The method of claim 1, wherein the coverage deficit signaling is transmitted with a coverage deficit range signaling pattern associated with the coverage deficit range, the coverage deficit range signaling pattern including a repetition pattern associated with the coverage deficit range.

9. The method of claim 8, wherein the repetition pattern is synchronized based on a timing reference signal.

10. The method of claim 8, wherein the coverage deficit range signaling pattern further includes at least one of:

a code-domain multiplexing pattern associated with the coverage deficit range,

a time-domain multiplexing pattern associated with the coverage deficit range, and

a frequency-domain multiplexing pattern associated with the coverage deficit range.

11. The method of claim 1, wherein a power boost is applied to the coverage deficit signaling.

12. The method of claim 1, further comprising performing a coverage deficit random access procedure.

13. The method of claim 12, wherein the coverage deficit random access procedure includes transmitting random access sequence via a machine-type communication (MTC) physical random access channel (PRACH) and via a random access pattern associated with the coverage deficit range, the random access sequence including an MTC PRACH signature associated with the coverage deficit range, the MTC PRACH signature reserved for coverage deficit random access procedures via the MTC PRACH.

14. The method of claim 12, wherein the coverage deficit random access procedure includes transmitting random access sequences via a main physical random access channel (PRACH) and via a random access pattern associated with the coverage deficit range, the random access sequence including a main PRACH signature associated with the coverage deficit range, the main PRACH signature reserved for coverage deficit random access procedures via the main PRACH.

15. The method of claim 12, wherein the coverage deficit random access procedure includes:

transmitting first random access sequence via a machine-type communication (MTC) physical random access channel (PRACH) and via a first random access pattern associated with the coverage deficit range, the first random access sequence including an MTC PRACH signature associated with the coverage deficit range, the MTC PRACH signature reserved for coverage deficit random access procedures via the MTC PRACH, and

transmitting second random access sequence via a main PRACH and via a second random access pattern associated with the coverage deficit range, the second random access signaling including a main PRACH signature associated with the coverage deficit range, the main PRACH signature reserved for the coverage deficit random access procedures via the main PRACH.

16. A terminal including a non-transitory computer-readable medium having encoded therein programming code executable by a processor to perform operations comprising:

detecting a synchronization signal from a base station;

determining a synchronization detection probability based on the detection of the synchronization signal;

estimating a coverage deficit range based on the synchronization detection probability; and

transmitting coverage deficit signaling configured to indicate the coverage deficit range estimated based on the synchronization detection probability.

17. The terminal of claim 16, wherein the coverage deficit signaling is transmitted via machine-type communication (MTC) physical random access channel (PRACH) resources, the coverage deficit signaling including an MTC PRACH signature reserved for coverage deficit communication via the MTC PRACH resources.

18. The terminal of claim 16, wherein the coverage deficit signaling is transmitted via main physical random access channel (PRACH) resources, the coverage deficit signaling including a main PRACH signature reserved for coverage deficit communication via the main PRACH resources.

19. The terminal of claim 16, the operations further comprising performing a coverage deficit random access procedure including transmitting random access sequences via a machine-type communication (MTC) physical random access channel (PRACH) and via a random access sequence pattern associated with the coverage deficit range, the random access sequence including an MTC PRACH signature associated with the coverage deficit range, the MTC PRACH signature reserved for coverage deficit random access procedures via the MTC PRACH.

20. The terminal of claim 16, the operations further comprising performing a coverage deficit random access procedure including transmitting random access sequence via a main physical random access channel (PRACH) and via a random access sequence pattern associated with the coverage deficit range, the random access sequence including a main PRACH signature associated with the coverage deficit range, the main PRACH signature reserved for coverage deficit random access procedures via the main PRACH.