METHODS AND APPARATUS FOR DEMODULATION REFERENCE SIGNALS AND SYNCHRONIZATION SIGNALS IN EXTENSION CARRIER OF LTE ADVANCED

• US 20140241150A1
• Filed: 02/26/2013
• Published: 08/28/2014
• Est. Priority Date: 02/26/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Ng, Boon Loong, Nam, Young-Han, Zhang, Jianzhong, Han, Jin-Kyu
• Granted Patent: US 9,060,321 B2
• Time in Patent Office: Days
• US Class Current: 370/229
• CPC Class Codes: H04B 7/2656 for structure of frame, burst
• CPC Class Codes: H04L 1/00 Arrangements for detecting or preventing errors in the information received correcting synchronisation H04L7/00
• CPC Class Codes: H04L 5/00 Arrangements affording multiple use of the transmission path
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 48/00 Access restriction access security to prevent unauthorised access H04W12/08; Network selection; Access point selection
• CPC Class Codes: H04W 52/02 Power saving arrangements in wired systems H04L12/12; signaling of mobile application services, e.g. low battery notifications H04W4/20
• CPC Class Codes: H04W 56/00 Synchronisation arrangements
• CPC Class Codes: H04W 56/001 Synchronization between nodes
• CPC Class Codes: H04W 88/00 Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A telecommunications system is configured to perform a method for mapping synchronization signals. The method includes transmitting data, reference signals, synchronization signals and control elements to at least one of the plurality of subscriber stations. The method also includes configuring DMRS parameters to avoid a collision between the DMRS and at least one of the synchronization signals in a middle 6 resource blocks (RBs) of a system bandwidth.

Claims

1. For use in a wireless communications network, a base station configured to communicate with a plurality of subscriber stations, the base station comprising:

a transmit path configured to transmit data, reference signals, synchronization signals and control elements to at least one of the plurality of user equipments (UEs); and

processing circuitry configured to configure demodulation reference signal (DMRS) parameters for each of a plurality of physical resource blocks (PRBs) to avoid a collision between the DMRS and at least one of the synchronization signals in a middle 6 resource blocks (RBs) of a system bandwidth.

2. The base station as set forth in claim 1, wherein the processing circuitry is configured to puncture a portion of the DMRS that collides with the synchronization signals.

3. The base station as set forth in claim 1, wherein the transmit path is configured to transmit using a Frequency Division Duplexing (FDD) and wherein the processing circuitry is configured to reuse a Time Division Duplexing (TDD) DMRS to avoid a collision with the synchronization signals.

4. The base station as set forth in claim 1, wherein the processing circuitry is configured to at least one of:

shift the DMRS to avoid a collision with the synchronization signals; and

use a new DMRS to avoid the collision with the synchronization signals.

5. The base station as set forth in claim 1, wherein the processing circuitry is signal the DMRS parameters using at least one of:

a radio resource control (RRC) message and a broadcast message.

6. The base station as set forth in claim 1, wherein the processing circuitry is configured to adjust a location of at least one of the synchronization signals.

7. For use in a wireless communications network, a method for configuring downlink modulation reference signals (DMRS), the method comprising:

transmitting data, reference signals, synchronization signals and control elements to at least one of the plurality of subscriber stations; and

configuring DMRS parameters to avoid a collision between the DMRS and at least one of the synchronization signals in a middle 6 resource blocks (RBs) of a system bandwidth.

8. The method as set forth in claim 7, wherein configuring comprises puncturing a portion of the DMRS that collides with the synchronization signals.

9. The method as set forth in claim 7, wherein the transmit path is configured to transmit using a Frequency Division Duplexing (FDD) and wherein reusing a Time Division Duplexing (TDD) DMRS to avoid a collision with the synchronization signals.

10. The method as set forth in claim 7, wherein configuring comprises at least one of:

shifting the DMRS to avoid a collision with the synchronization signals; and

configuring a new DMRS to avoid the collision with the synchronization signals.

11. The method as set forth in claim 7, wherein configuring comprises signaling a DMRS configuration using at least one of:

a radio resource control (RRC) message and a broadcast message.

12. The method as set forth in claim 7, wherein configuring comprises adjusting a location of at least one of the synchronization signals.

13. For use in a wireless communications network, a subscriber station configured to communicate with at least one base station, the subscriber station comprising:

a receiver configured to receive data, reference signals, synchronization signals and control elements from the base station; and

processing circuitry configured to read physical resource blocks (PRBs) containing demodulation reference signals (DMRS) parameters that have been configured to avoid a collision between the DMRS and at least one of the synchronization signals in the middle 6 resource blocks (RBs) of a system bandwidth.

14. The subscriber station as set forth in claim 13, wherein a portion of the DMRS that collides with the synchronization signals is punctured and wherein the processing circuitry is configured to not expect the DMRS that collides with the synchronization signals.

15. The subscriber station as set forth in claim 13, wherein the receive path is configured to receive using a Frequency Division Duplexing (FDD) and wherein a Time Division Duplexing (TDD) DMRS is reused to avoid a collision with the synchronization signals.

16. The subscriber station as set forth in claim 13, wherein the DMRS is shifted to avoid a collision with the synchronization signals or a new DMRS is configured to avoid the collision with the synchronization signals.

17. The subscriber station as set forth in claim 13, wherein the processing circuitry is configured to implicitly determine the DMRS configuration.

18. The subscriber station as set forth in claim 13, wherein when no radio resource control (RRC) signaling associated with the DMRS parameters in the middle 6RBs is received, the processing circuitry is configured to use a first DMRS parameters.

19. The subscriber station as set forth in claim 13, wherein the processing circuitry is configured to read a radio resource control (RRC) signaling associated with the DMRS parameters in the middle 6RBs is received to determine DMRS parameters.

20. The subscriber station as set forth in claim 13, a location of at least one of the synchronization signals is adjusted.