Enhanced receiver configuration adaptive to cyclic prefix configuration

Patent metadata

Field	Value
Publication number	US-9331827-B2
Application number	US-201314400659-A
Country	US
Kind code	B2
Filing date	May 14, 2013
Priority date	May 14, 2012
Publication date	May 3, 2016
Grant date	May 3, 2016

Abstract

A method in a first radio node is described for adapting a receiver type in the first radio node. The first radio node includes a first and a second receiver types. The first radio node is included in a wireless communications network, which further includes a second radio node and at least one third radio node. The method includes determining a Cyclic Prefix, CP, length of at least one radio signal transmitted by the second radio node, and a CP length of at least one radio signal transmitted by the at least one third radio node. The first node then adapts, the receiver type to be one of the first type and the second types. This is done based on a relation between the CP length of the radio signal transmitted by the second radio node, and the CP length of the radio signal transmitted by the third radio node.

First claim

The invention claimed is:

1. A method in a first radio node for adapting a receiver type in the first radio node, the first radio node comprising a first receiver type and a second receiver type, the two receiver types being different, and the first radio node being comprised in a wireless communications network, the wireless communications network further comprising a second radio node and at least one third radio node, the method comprising:
determining a Cyclic Prefix, CP, length of at least one radio signal transmitted by the second radio node, and a CP length of at least one radio signal transmitted by the at least one third radio node; and
adapting in the first radio node, the receiver type to be one of the first receiver type and the second receiver type, based on a relation between the CP length of the radio signal transmitted by the second radio node and the CP length of the radio signal transmitted by the third radio node,
wherein the first radio node is unaware of the CP length of the at least one radio signal transmitted by the at least one third radio node when the first radio node receives the at least one radio signal from the second radio node,
wherein the first receiver type is a first type of enhanced receiver of the first radio node configured to utilize a first technique for mitigating interference of the wireless communication network, and
wherein the second receiver type is a second type of enhanced receiver of the first radio node configured to utilize a second technique, different from the first technique, for mitigating interference of the wireless communication network.

2. The method of claim 1 , wherein the adapting is performed when the first radio node receives signals from the second radio node, wherein the signals are interfered by the at least one third radio node.

3. The method according to claim 1 , wherein the at least one third radio node comprises an aggressor node that has not been searched and identified by the first radio node, wherein the determining the CP length of the at least one radio signal transmitted by the at least one third radio node is based on at least one of: received information on the CP length of the at least one radio signal transmitted by the at least one third radio node, radio characteristics of the at least one third radio node, and radio measurements.

4. The method according to claim 1 , wherein the first receiver type is not capable of mitigating interference caused by the at least one third radio node or is capable of mitigating the interference, provided the interference from the at least one third radio node is below a threshold, and the second receiver type is capable of mitigating interference caused by the at least one third radio node.

5. The method according to claim 1 , further comprising:
selecting the second receiver type responsive to a determination that the CP length of the at least one radio signal transmitted by the at least one third radio node is smaller than the CI length of the at least one radio signal transmitted by the second radio node; and
selecting the second receiver type responsive to a determination that the CP length of the at least one radio signal transmitted by the at least one third radio node and the CP length of the at least one radio signal transmitted by the second radio node are the same.

6. The method according to claim 1 , the method further comprising signalling to a node comprised in the wireless communications network, the node being different from the first radio node, at least one of:
information related to the determined CP length of the at least one radio signal transmitted by one of: the at least one third radio node and the second radio node, and
a capability of the first radio node for adapting the receiver type depending on the CP length of the at least one radio signal transmitted by the second radio node and the CP length of the at least one radio signal transmitted by the at least one third radio node.

7. The method of claim 6 , wherein the node is a positioning node.

8. The method of claim 2 , wherein the signals from the second radio node are interfered by the at least one third radio node, and wherein the adapting is further based on at least one of: type of the signals, whether the second radio node and the at least one third radio node are associated with serving cells of the first radio node, bandwidth of one of: the second radio node and the third radio node, Multicast-Broadcast Single Frequency Network configuration of one of the second radio node and the at least one third radio node, measurement pattern for measurements in the second radio node, transmit pattern for one or more signals/channels transmitted in the at least one third radio node, pattern for short-range communication, low-activity state, level of synchronization between the second radio node and the at least one third radio node, interference conditions, and one of radio conditions and radio characteristics of the at least one third radio node.

9. The method of claim 1 , wherein transmissions by the second radio node and transmissions by the at least one third radio node comprise a multi-leg transmission, wherein the multi-leg transmission comprises transmissions from multiple serving cells or radio links.

10. A first radio node for adapting a receiver type in the first radio node, the first radio node comprising a first receiver type and a second receiver typo, the two receiver types being different, and the first radio node being adapted to be comprised in a wireless communications network, the wireless communications network further being adapted to comprise a second radio node and at least one third radio node, the first radio node comprising:
a determining circuit configured to determine a Cyclic Prefix, CP, length of at least one radio signal to be transmitted by the second radio node, and a CP length of at least one radio signal to be transmitted by the at least one third radio node; and
an adapting circuit configured to adapt in the first radio node, the receiver type to be one of the first receiver type and the second receiver type, based on a relation between the CP length of the radio signal to be transmitted by the second radio node and the CP length of the radio signal to be transmitted by the third radio node,
wherein the CP length of the at least one radio signal transmitted by the at least one third radio node is not indicated to the first radio node when the first radio node receives the at least one radio signal transmitted by the second radio node,
wherein the first receiver type is a first type of enhanced receiver of the first radio node configured to utilize a first technique for mitigating interference of the wireless communication network, and
wherein the second receiver type is a second type of enhanced receiver of the first radio node configured to utilize a second technique, different from the first technique, for mitigating interference of the wireless communication network.

11. The first radio node of claim 10 , wherein the adapting circuit is configured to adapt when the first radio node receives signals from the second radio node, wherein the signals are interfered by the at least one third radio node.

12. The first radio node of claim 10 , wherein the at least one third radio node comprises an aggressor node that has not been searched and identified by the first radio node, and wherein the determining circuit is configured to determine based on at least one of received information on the CP length of the at least one radio signal to be transmitted by the at least one third radio node, radio characteristics of the at least one third radio node, and radio m

Assignees

• Ericsson Telefon Ab L M
• Ericsson Telefon Ab L M

Inventors

• Siomina Iana
• Kazmi Muhammad

Classifications

• H04L5/0032 Primary

  Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation · CPC title

• H04L27/2607

  Cyclic extensions · CPC title

• H04L27/2605

  Symbol extensions, e.g. Zero Tail, Unique Word [UW] · CPC title

• H04L27/2647

  Arrangements specific to the receiver only (equalisation H04L27/01) · CPC title

• H04L27/2646

  using feedback from receiver for adjusting OFDM transmission parameters, e.g. transmission timing or guard interval length · CPC title