METHODS ENABLING ENHANCED RECEIVERS WITH A REDUCED NEED FOR GAPS WHEN HANDLING INTERFERENCE

• US 20140204866A1
• Filed: 01/21/2014
• Published: 07/24/2014
• Est. Priority Date: 01/21/2013
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Siomina, Iana, Axmon, Joakim
• Granted Patent: US 9,877,229 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04B 1/1027 assessing signal quality or detecting noise/interference for the received signal
• CPC Class Codes: H04B 1/12 Neutralising, balancing, or compensation arrangements
• CPC Class Codes: H04J 11/005 of intercell interference
• CPC Class Codes: H04J 11/0056 Inter-base station aspects
• CPC Class Codes: H04L 25/03821 Inter-carrier interference cancellation [ICI]
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04W 28/04 Error control
• CPC Class Codes: H04W 72/541 using the level of interference

Abstract

According to some embodiments, a radio node receives target channels from a target cell and interfering channels from first and second interfering cells. The first target channel and the first interfering channel each comprise a first channel type, and the second target channel and the second interfering channel each comprise a second channel type. The radio node receives the first interfering channel when receiving the first target channel and determines first information accordingly. The radio node uses one or more gaps impacting receipt of the second interfering channel relative to receipt of the second target channel and determines second information based on receipt of the second target channel and second interfering channel. The radio node reduces interference associated with the at least one of the interfering cell based on at least one of the first information and the second information.

Claims

1. A method in a radio node comprising an enhanced receiver, the method comprising:

receiving a first target channel from a target cell, the first target channel comprising a first channel type;

receiving a first interfering channel when receiving the first target channel, the first interfering channel comprising the first channel type and received from a first interfering cell;

determining first information based on receiving the first target channel and the first interfering channel;

receiving a second target channel from the target cell, the second target channel comprising a second channel type;

receiving a second interfering channel from a second interfering cell, the second interfering channel comprising the second channel type, wherein the radio node uses one or more gaps impacting receipt of the second interfering channel relative to receipt of the second target channel;

determining second information based on receiving the second target channel and the second interfering channel; and

reducing interference associated with at least one of the first interfering cell and the second interfering cell based on at least one of the first information and the second information.

2. The method of claim 1, further comprising:

determining a number of redundancy versions of data to be received from the second channel type based on interference conditions;

configuring a number of the one or more gaps based on the number of redundancy versions of data to be received from the second channel type.

3. The method of claim 1, wherein the radio node configures no more than one gap per a 40 millisecond time period.

4. The method of claim 1, further comprising:

receiving first channel data from the first channel type;

receiving second channel data from the second channel type, the second channel data received using one or more of the gaps and after receiving the first channel data; and

receiving a redundancy version of the first channel data from the first channel type, the redundancy version received after receiving the second channel data.

5. The method of claim 1, further comprising:

receiving second channel data from the second channel type, the second channel data received using one or more of the gaps;

determining to skip receiving a first redundancy version of the second channel data such that no gap is configured to receive the first redundancy version; and

receiving a second redundancy version of the second channel data, the second redundancy version available after the first redundancy version and received using one or more of the gaps.

6. The method of claim 1, wherein:

the first channel type corresponds to a Physical Broadcast Channel (PBCH) and the first information comprises Master Information Block (MIB) information; and

the second channel type corresponds to a Physical Downlink Shared Channel (PDSCH) and the second information comprises System Information Block (SIB) information.

7. The method of claim 6, further comprising facilitating early receipt of the SIB information wherein the radio node receives the SIB information after receiving the MIB information and prior to receiving a redundancy version of the MIB information.

8. The method of claim 1, wherein the first interfering cell and the second interfering cell are the same.

9. The method of claim 1, wherein the first cell is a serving cell.

10. The method of claim 1, wherein the first cell is a non-serving cell.

11. The method of claim 1, wherein the one or more gaps comprise at least one of:

autonomous gaps and measurement gaps.

12. The method of claim 1, wherein the gaps are configured by a network node in a message received by the radio node.

13. The method of claim 1, wherein receiving the first channel type further comprises one or more of:

early reading of the first channel type and sparse reading of the first channel type.

14. The method of claim 1, wherein receiving the second channel type further comprises one or more of:

early reading of the second channel type and sparse reading of the second channel type.

15. A radio node comprising an enhanced receiver, the radio node operable to:

receive a first target channel from a target cell, the first target channel comprising a first channel type;

receive a first interfering channel when receiving the first target channel, the first interfering channel comprising the first channel type and received from a first interfering cell;

determine first information based on receiving the first target channel and the first interfering channel;

receive a second target channel from the target cell, the second target channel comprising a second channel type;

receive a second interfering channel from a second interfering cell, the second interfering channel comprising the second channel type, wherein the radio node uses one or more gaps impacting receipt of the second interfering channel relative to receipt of the second target channel;

determine second information based on receiving the second target channel and the second interfering channel; and

reduce interference associated with at least one of the first interfering cell and the second interfering cell based on at least one of the first information and the second information.

16. The radio node of claim 15, further operable to:

determine a number of redundancy versions of data to be received from the second channel type based on interference conditions;

configure a number of the one or more gaps based on the number of redundancy versions of data to be received from the second channel type.

17. The radio node of claim 15, wherein the radio node configures no more than one gap per a 40 millisecond time period.

18. The radio node of claim 15, further operable to:

receive first channel data from the first channel type;

receive second channel data from the second channel type, the second channel data received using one or more of the gaps and after receiving the first channel data; and

receive a redundancy version of the first channel data from the first channel type, the redundancy version received after receiving the second channel data.

19. The radio node of claim 15, further operable to:

receive second channel data from the second channel type, the second channel data received using one or more of the gaps;

determine to skip receiving a first redundancy version of the second channel data such that no gap is configured to receive the first redundancy version; and

receive a second redundancy version of the second channel data, the second redundancy version available after the first redundancy version and received using one or more of the gaps.

20. The radio node of claim 15, wherein:

the first channel type corresponds to a Physical Broadcast Channel (PBCH) and the first information comprises Master Information Block (MIB) information; and

the second channel type corresponds to a Physical Downlink Shared Channel (PDSCH) and the second information comprises System Information Block (SIB) information.

21. The radio node of claim 20, the radio node further operable to:

facilitate early receipt of the SIB information wherein the radio node receives the SIB information after receiving the MIB information and prior to receiving a redundancy version of the MIB information.

22. A network node operable to:

communicate an indicator to a radio node, the indicator instructing a radio node to;

configure the radio node to receive a first channel type without using gaps impacting receipt of a first interfering channel relative to receipt of a first target channel; and

configure the radio node to receive a second channel type using one or more gaps impacting receipt of a second interfering channel relative to receipt of a second target channel.

23. The network node of claim 22, wherein the indicator comprises receiver characteristics and indicates to configure the radio node according to the indicator if the radio node supports the receiver characteristics.

24. The network node of claim 22, wherein the indicator indicates whether the indicator applies to intra-frequency cells, intra-Radio Access technology cells, or intra-band cells.

25. A method in a network node, comprising:

communicating an indicator to a radio node, the indicator instructing the radio node to;

configure the radio node to receive a first channel type without using gaps impacting receipt of a first interfering channel relative to receipt of a first target channel; and

configure the radio node to receive a second channel type using one or more gaps impacting receipt of a second interfering channel relative to receipt of a second target channel.

26. The method of claim 25, wherein the indicator comprises receiver characteristics and indicates to configure the radio node according to the indicator if the radio node supports the receiver characteristics.

27. The method of claim 25, wherein the indicator indicates whether the indicator applies to intra-frequency cells, intra-Radio Access technology cells, or intra-band cells.