RADIO COMMUNICATION TERMINAL DEVICES AND METHODS FOR RANDOM ACCESS

• US 20170181157A1
• Filed: 03/01/2017
• Published: 06/22/2017
• Est. Priority Date: 03/09/2004
• Status: Active Grant

• Current Assignee: Optis Wireless Technology, LLC (Brevet Capital)
• Original Assignee: Optis Wireless Technology, LLC (Brevet Capital)
• Inventors: Nishio, Akihiko, Cheng, Jun, Miyoshi, Kenichi
• Granted Patent: US 10,028,262 B2
• Time in Patent Office: Days
• CPC Class Codes: H04W 36/16 Performing reselection for specific purposes
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/543 based on requested quality, e.g. QoS
• CPC Class Codes: H04W 72/56 based on priority criteria
• CPC Class Codes: H04W 74/004 in the uplink, i.e. towards network
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A terminal apparatus includes processing circuitry that generates a plurality of identical transmission packets and assigns each of the plurality of identical transmission packets to subcarriers in a random access channel. A transmitter transmits the plurality of identical transmission packets in accordance with the assignment over the random access channel.

Claims

1. A terminal apparatus comprising:

processing circuitry configured to generate a plurality of identical transmission packets and assign each of the plurality of identical transmission packets to subcarriers in a random access channel, and

a transmitter configured to transmit the plurality of identical transmission packets in accordance with the assignment over the random access channel.

2. The terminal apparatus in claim 1, further comprising:

a receiver configured to receive control information transmitted from a base station apparatus.

3. The terminal apparatus in claim 2, wherein the transmitter is configured to transmit the plurality of identical transmission packets without waiting for a response from the base station apparatus to confirm whether any of the plurality of identical transmission packets has been received at the base station apparatus.

4. The terminal apparatus in claim 2, wherein as a number of terminal apparatuses belonging to a cell associated with the base station apparatus increases, a number of identical transmission packets transmitted decreases.

5. The terminal apparatus in claim 1, wherein the plurality of identical transmission packets includes a random access sequence repeated successively in a time domain.

6. The terminal apparatus in claim 1, wherein the transmitted random access signal includes one of the plurality of identical transmission packets in one time slot and another of the plurality of identical transmission packets in a second, different time slot.

7. The terminal apparatus in claim 1, wherein the random access channel includes one or more of a time slot, frequency, or spreading code.

8. The terminal apparatus in claim 1, wherein two of the plurality of identical transmission packets are consecutive in the time domain.

9. The terminal apparatus in claim 1, wherein the transmitter is configured to transmit the random access signal on at least two consecutive time slots.

10. The terminal apparatus in claim 1, wherein a number of the plurality of identical transmission packets depends on a priority associated with the terminal apparatus.

11. A method implemented in a terminal comprising:

generating a plurality of identical transmission packets;

assigning each of the plurality of identical transmission packets to subcarriers in a random access channel; and

transmitting the plurality of identical transmission packets in accordance with the assignment over the random access channel.

12. The method in claim 11, further comprising receiving control information transmitted from a base station.

13. The method in claim 12, further comprising transmitting the plurality of identical transmission packets without waiting for a response from the base station to confirm whether any of the plurality of identical transmission packets has been received at the base station.

14. The method in claim 12, wherein as a number of terminals belonging to a cell associated with the base station increases, decreasing a number of identical transmission packets transmitted.

15. The method in claim 11, wherein the plurality of identical transmission packets includes a random access sequence repeated successively in a time domain.

16. The method in claim 11, wherein the transmitted random access signal includes one of the plurality of identical transmission packets in one time slot and another of the plurality of identical transmission packets in a second, different time slot.

17. The method in claim 11, wherein the random access channel is associated with radio resources, the method further comprising transmitting the random access signal using a radio resource selected at random from radio resource candidates.

18. The method in claim 11, wherein two of the plurality of identical transmission packets are consecutive in the time domain.

19. The method in claim 11, further comprising transmitting the random access signal on at least two consecutive time slots.

20. The method in claim 11, wherein a number of the plurality of identical transmission packets depends on a priority associated with the terminal.