Method and Arrangement for Reconfiguring Mapping of Carrier Indicator Field to Component Carrier

• US 20110141985A1
• Filed: 09/20/2010
• Published: 06/16/2011
• Est. Priority Date: 12/14/2009
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Parkvall, Stefan, Gerstenberger, Dirk, Baldemair, Robert, Larsson, Daniel
• Granted Patent: US 9,124,412 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 5/0064 Rate requirement of the data, e.g. scalable bandwidth, data priority
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04L 5/0096 Indication of changes in allocation
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

A method and an arrangement in a radio network node for reconfiguring mappings from Carrier Indicator Field-values to component carriers are provided. Each CIF-value is mapped to a respective component carrier comprising a respective shared data channel. Each respective shared data channel corresponds to at least one downlink control channel carrying said each CIF-value. The radio network node reconfigures mappings from CIF-values to component carriers, while at least one mapping of CIF-value to component carrier is maintained. The component carrier of said at least one mapping from CIF-value to component carrier comprises said at least one downlink control channel and a shared data channel corresponding to said at least one downlink control channel. The radio network node sends at least one of the reconfigured mappings from CIF-values to component carriers to the user equipment.

Claims

1. A method in a radio network node for reconfiguring mappings from Carrier Indicator Field-values, referred to as “

CIF-values”

, to component carriers, wherein each CIF-value is mapped to a respective component carrier comprising a respective shared data channel, wherein each respective shared data channel corresponds to at least one downlink control channel carrying said each CIF-value, and the component carriers are managed by the radio network node, wherein the radio network node and the user equipment are comprised in a multi-carrier radio communication system wherein the method comprises;

reconfiguring mappings from CIF-values to component carriers, while maintaining at least one mapping of CIF-value to component carrier, wherein the component carrier of said at least one mapping from CIF-value to component carrier comprises said at least one downlink control channel and a shared data channel corresponding to said at least one downlink control channel; and

sending at least one of the reconfigured mappings from CIF-values to component carriers to the user equipment.

2. The method of claim 1, wherein the component carrier of said at least one mapping from CIF-value to component carrier corresponds to a primary cell, wherein the primary cell is one of the component carriers managed by the radio network node.

3. The method of claim 1, wherein the CIF-value of said at least one mapping from CIF-value to component carrier is equal to zero.

4. The method of claim 1, wherein sending the configured mapping further comprises

refraining from sending said at least one mapping from CIF-value to component carrier to the user equipment.

5. The method of claim 1, wherein the control channel is PDCCH and the shared data channel is PDSCH or PUSCH.

6. The method of claim 1, wherein the step of sending at least some of the reconfigured mappings is performed using Radio Resource Control protocol.

7. An arrangement in a radio network node for reconfiguring mappings from Carrier Indicator Field-values, referred to as “

CIF-values”

, to component carriers, wherein each CIF-value is mapped to a respective component carrier comprising a respective shared data channel, wherein each respective shared data channel corresponds to at least one downlink control channel carrying said each CIF-value, and the component carriers are managed by the radio network node, wherein the radio network node and the user equipment are comprised in a multi-carrier radio communication system wherein the arrangement comprises

a reconfiguring circuit configured to reconfigure mappings from CIF-values to component carriers, while maintaining at least one mapping of CIF-value to component carrier, wherein the component carrier of said at least one mapping from CIF-value to component carrier comprises said at least one downlink control channel and a shared data channel corresponding to said at least one downlink control channel, and

a transceiver configured to send at least one of the reconfigured mappings from CIF-values to component carriers to the user equipment.

8. The arrangement of claim 7, wherein the component carrier of said at least one mapping from CIF-value to component carrier corresponds to a primary cell, wherein the primary cell is one of the component carriers managed by the radio network node.

9. The arrangement of claim 7, wherein the CIF-value of said at least one mapping from CIF-value to component carrier is equal to zero.

10. The arrangement of claim 7, wherein the transceiver further is configured to refrain from sending said at least one mapping from CIF-value to component carrier to the user equipment.

11. The arrangement of claim 7, wherein the control channel is PDCCH and the shared data channel is PDSCH or PUSCH.

12. The arrangement of claim 7, wherein the transceiver is configured to use Radio Resource Control protocol when sending at least some of the reconfigured mappings to the user equipment.