Methods and Arrangements for Frequency Selective Repetition

• US 20110081856A1
• Filed: 06/22/2009
• Published: 04/07/2011
• Est. Priority Date: 06/24/2008
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Frenger, Pål, Larsson, Peter, Johansson, Niklas, Mildh, Gunnar
• Granted Patent: US 8,718,540 B2
• Time in Patent Office: Days
• US Class Current: 455/7
• CPC Class Codes: H04B 7/15542 Selecting at relay station its transmit and receive resources selection of wireless resources by user or terminal H04W72/02; arrangements affording multiple use of the transmission path by two-dimensional division of the resources H04L5/0003, or by allocating sub-channels H04L5/003
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Methods and apparatuses for enabling frequency selective repetition of signals in a telecommunication system in which aggregation of component carriers is applied. Information signals are received (1102) in a first set of frequency bands, which is defined to cover anchor carriers, which can be used by both legacy and non-legacy terminals. Further, information is received (1104) in a second set of frequency bands, which is defined to cover non-anchor carriers, which only can be used by non-legacy terminals. Instructions concerning which frequency band(s) that should be repeated by the repeater node, are also received (1106). Thereafter, the frequency bands indicated in the instructions are filtered out (1110), after which these frequency bands or parts are repeated by the repeater node. This results in enabling frequency selective repetition in a system which may comprise legacy mobile, which limits the interference in the system, which enables higher bitrates and saves energy.

Claims

1. Method in a repeater node for enabling frequency selective repetition of signals in a telecommunication system in which aggregation of component carriers is applied, said method comprising the steps of:

receiving information signals in a first set of frequency bands defined to cover anchor carrier(s),

receiving information signals in a second set of frequency bands defined to cover non-anchor carrier(s),

receiving instructions concerning which frequency band(s) or subset thereof that should be repeated,

filtering out the frequency band(s) to be repeated according to the received instructions,

repeating the frequency band(s) to be repeated according to the received instructions,

wherein the first set of frequency bands can be used by both legacy and non-legacy terminals, and the second set of frequency bands only can be used by non-legacy terminals.

2. The method according to claim 1, wherein the granularity of the filtering is matched to the bandwidth of each component carrier in a set of component carriers.

3. The method according to claim 1, wherein the granularity of the filtering of a component carrier is finer than the bandwidth of said component carrier.

4. The method according to claim 1, wherein the granularity of the filtering of a non-anchor carrier is finer than the bandwidth of said non-anchor carrier.

5. The method according to claim 1, wherein the sets of frequency bands are dynamically adjusted to match the distribution of the load on respective set of frequency bands.

6. The method according to claim 5, wherein the bandwidth of the component carrier(s) and/or the amount of component carriers are dynamically adjusted.

7. The method according to claim 1, wherein a new anchor carrier is created either by reconfiguring a non-anchor carrier or by creating a new component carrier and configuring said new component carrier to be an anchor carrier.

8. The method according to claim 1, wherein at least a part of the first set of frequency bands is repeated.

9. Repeater node adapted to enable frequency selective repetition in a telecommunication system in which carrier aggregation of component carriers is applied, said repeater node comprising:

a receiving unit, adapted to receive;

information in a first set of frequency bands defined to cover anchor carrier(s), and

information in a second set of frequency bands defined to cover non-anchor carrier(s),

instructions concerning which frequency band(s) or subset thereof to repeat,

a filtering unit, adapted to filter out the frequency band(s) to be repeated according to the received instructions,

a repeating unit, adapted to repeat the frequency band(s) to be repeated according to the received instructions,

wherein the first set of frequency bands can be used by both legacy and non-legacy terminals, and the second set of frequency bands only can be used by non-legacy terminals.

10. The repeater node according to claim 9, wherein the filtering unit is further adapted to match the granularity of the filtering to the bandwidth of each carrier in a set of component carriers.

11. The repeater node according to claim 9, wherein the filtering unit is further adapted to have a granularity of the filtering of a component carrier that is finer than the bandwidth of said component carrier.

12. The repeater node according to claim 9, wherein the filtering unit is further adapted to have a granularity of the filtering of a non-anchor carrier that is finer than the bandwidth of said non-anchor carrier.

13. The repeater node according to claim 9, wherein the filtering unit is further adapted to dynamically adjust the filtering in accordance with dynamical changes in the component carriers.

14. The repeater node according to claim 9, wherein the repeater node is further adapted to repeat at least a part of the first set of frequency bands.

15. Method in a base station for enabling frequency selective repetition in a telecommunication system in which carrier aggregation of component carriers is applied, said method comprising the steps of:

transceiving information on a first set of component carriers defined to be anchor carrier(s),

transceiving information on a second set of component carriers defined to be non-anchor carrier(s),

creating instructions to a repeater node concerning which component carrier(s) or subset thereof to repeat,

transmitting the instructions to the repeater node,

wherein the first set of component carriers can be used by both legacy and non-legacy terminals, and the second set of component carriers only can be used by non-legacy terminals.

16. The method according to claim 15, wherein the sets of component carriers are dynamically adjusted to match the distribution of the load on respective set of component carriers.

17. The method according to claim 15, wherein the bandwidth of the component carrier(s) and/or the amount of component carriers are dynamically adjusted.

18. The method according to claim 15, wherein a new anchor carrier is created either by reconfiguring a non-anchor carrier or by creating a new component carrier and configuring said new component carrier to be an anchor carrier.

19. The method according to claim 15, wherein the instructions to the repeater node comprises information, which leads to that at least a part of the first set of frequency bands is repeated by the repeater node.

20. Base station adapted to enable frequency selective repetition in a telecommunication system in which carrier aggregation of component carriers is applied, said base station comprising:

a transceiving unit adapted to transceive information on;

a first set of component carriers defined to be anchor carrier(s),

a second set of component carriers defined to be non-anchor carrier(s),

an instruction creating unit adapted to create instructions to a repeater node concerning which component carrier(s) or subset thereof to repeat,

a transmitting unit adapted to transmit the instructions to the repeater node,

wherein the first set of component carriers can be used by both legacy and non-legacy terminals, and the second set of component carriers only can be used by non-legacy terminals.

21. The base station according to claim 20, wherein the base station further comprises:

a control unit, adapted to dynamically adjust the sets of component carriers in order to match the distribution of the load on respective set of component carriers.

22. The base station according to claim 21, wherein the control unit is further adapted to dynamically adjust the bandwidth of the component carrier(s) and/or the amount of component carriers

23. The base station according to claim 21, wherein the control unit is further adapted to create a new anchor carrier either by reconfiguring a non-anchor carrier or by creating a new component carrier and configuring said new component carrier to be an anchor carrier

24. The base station according to claim 20, wherein the instruction creating unit is further adapted to include information which leads to that at least a part of the first set of frequency bands is repeated by the repeater node.