Devices, Nodes and Methods in a Wireless Communication Network

• US 20170367111A1
• Filed: 09/01/2017
• Published: 12/21/2017
• Est. Priority Date: 03/03/2015
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Gelabert, Xavier, Lundqvist, Henrik, Costa, Mario, Kela, Petteri
• Granted Patent: US 10,412,756 B2
• Time in Patent Office: Days
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 72/1268 of uplink data flows
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/51 based on terminal or device properties
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access

Abstract

Implementations described herein relate generally to a user device, to an access node, and to methods for a user device and for an access node. The user device includes a receiver configured to receive at least one downlink signal from an access node. The user device further includes a processor configured to measure the at least one downlink signal at two time instants, to determine if a difference of the measured at least one downlink signal at the two time instants exceeds a threshold, and to generate, when the difference exceeds the threshold, at least one uplink transmission. The user device further includes a transmitter configured to transmit the at least one uplink transmission over an uplink random access channel.

Claims

1. A user device including:

a receiver configured to receive at least one downlink signal from an access node;

a processor;

a memory storing a program to be executed in the processor, the memory comprising instructions for;

measuring the at least one downlink signal at two time instants,

determining if a difference of the measured at least one downlink signal at the two time instants exceeds a threshold, and

generating, when the difference exceeds the threshold, at least one uplink transmission; and

a transmitter configured to transmit the at least one uplink transmission over an uplink random access channel (RACH).

2. The user device as claimed in claim 1, wherein the at least one uplink transmission includes a request for a beacon transmission allocation.

3. The user device as claimed in claim 2, wherein the request for a beacon transmission allocation includes one or more of:

a request for shorter beacon transmission intervals;

a request for longer beacon transmission intervals;

a request for a start of a beacon transmission;

a request for keeping the beacon transmission that is being currently used to be unchanged; and

a request for a stop of a beacon transmission.

4. The user device as claimed in claim 2, wherein

the receiver is further configured to receive a beacon transmission allocation response in response to the request for a beacon transmission allocation;

and

the transmitter is further configured to transmit beacons according to the beacon transmission allocation response.

5. The user device as claimed in claim 4, wherein the program comprises further instructions for:

retransmitting the request for a beacon transmission allocation if the beacon transmission allocation response has not been received; and

re-establishing a connection with the access node if the beacon transmission allocation response has not been received after the request for a beacon transmission allocation is retransmitted a certain number of times.

6. The user device as claimed in claim 1, wherein the at least one uplink transmission includes a beacon.

7. The user device as claimed in claim 1, wherein the at least one uplink transmission includes a request for a channel state information (CSI) report transmission allocation.

8. The user device as claimed in claim 7, wherein the request for a channel state information (CSI) report transmission allocation includes one or more of:

a request for shorter channel state information (CSI) report transmission intervals;

a request for longer channel state information (CSI) report transmission intervals;

a request for a start of a channel state information (CSI) report transmission;

a request for keeping the channel state information (CSI) report transmission that is being currently used to be unchanged; and

a request for a stop of a channel state information (CSI) report transmission.

9. The user device as claimed in claim 7, wherein

the receiver is further configured to receive a channel state information (CSI) report transmission allocation response in response to the request for a channel state information (CSI) report transmission allocation;

and

the transmitter is further configured to transmit channel state information (CSI) reports according to the channel state information (CSI) report transmission allocation response.

10. The user device as claimed in claim 1, wherein the at least one uplink transmission includes at least one channel state information (CSI) report.

11. The user device as claimed in claim 1, wherein the at least one downlink signal includes one or more of:

a control signal received over a downlink control channel;

a default signal received over a downlink control channel;

a data signal received over a downlink data channel; and

a default signal received over a downlink data channel.

12. The user device as claimed in claim 1, wherein the program comprises further instructions for measuring at least one of a signal strength, a signal power, and a signal energy of the at least one downlink signal.

13. An access node including:

a transmitter configured to transmit at least one downlink signal;

a receiver configured to receive over a random access channel (RACH) at least one uplink transmission;

a processor; and

a memory storing a program to be executed in the processor, the memory comprising instructions for determining a transmission allocation for one or more of a beacon and a channel state information (CSI) report based on the at least one uplink transmission, wherein the transmitter is further configured to transmit a response corresponding to the determined transmission allocation downlink.

14. The access node as claimed in claim 13, wherein the at least one downlink signal includes one or more of:

a control signal transmitted over a downlink control channel;

a default signal transmitted over a downlink control channel;

a data signal transmitted over a downlink data channel; and

a default signal transmitted over a downlink data channel.

15. A method for a user device including:

receiving at least one downlink signal from an access node;

measuring the at least one downlink signal at two time instants;

determining if a difference of the measured at least one downlink signal at the two time instants exceeds a threshold;

generating, when the difference exceeds the threshold, at least one uplink transmission; and

transmitting the at least one uplink transmission over an uplink random access channel (RACH).

16. A method for an access node including:

transmitting at least one downlink signal;

receiving over a random access channel (RACH) at least one uplink transmission

determining a transmission allocation for one or more of a beacon and a channel state information (CSI) report based on the at least one uplink transmission; and

transmitting a response corresponding the determined transmission allocation downlink.