Method and system for transmitting position reference signal subframe

• US 9,603,135 B2
• Filed: 11/29/2011
• Issued: 03/21/2017
• Est. Priority Date: 01/07/2011
• Status: Active Grant

• Current Assignee: ZTE Corporation
• Original Assignee: ZTE Corporation
• Inventors: Guo, Senbao, Sun, Yunfeng, Dai, Bo, Zuo, Zhisong, Zhang, Junfeng
• Primary Examiner(s): Sinkantarakorn, Pao
• Assistant Examiner(s): PHILLIPS, MICHAEL K
• Application Number:
  US13/978,688
• Publication Number:
  US 20130294391A1
• Time in Patent Office: 1,939 Days
• US Class Current: 1/1
• CPC Class Codes: H04L 27/2607 Cyclic extensions
• CPC Class Codes: H04L 27/2666 Acquisition of further OFDM parameters, e.g. bandwidth, subcarrier spacing, or guard interval length
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

The disclosure claims a method and a device for transmitting a Position Reference Signal (PRS) subframe. In the disclosure, the network side configures certain channels or signals according to the configuration condition of the PRS, or the network side configures the PRS according to the configuration condition of certain channels or signals; the receiving side correctly identifies the length of Cyclic Prefix (CP) according to the configuration information issued by the network side, so as to correctly measure and accurately receive the channels or signals sent by the network side. The disclosure overcomes the technical problem in the conventional art that the length of CP is ambiguous, so that the signals cannot be measured and accurately received by the receiving side.

Claims

1. A method for transmitting a Position Reference Signal (PRS), comprising:

a network side configuring at least one of a Channel State Information Reference Signal (CSI-RS), a transmission Physical Downlink Shared Channel (PDSCH) and a Relay backhaul link according to the configuration condition of a PRS, or the network side configuring the PRS according to the configuration condition of at least one of the CSI-RS, the transmission PDSCH and the Relay backhaul link; and

the network side transmitting to a receiving side the configuration information of the PRS and the configuration information of at least one of the corresponding CSI-RS, the transmission PDSCH and the Relay backhaul link;

wherein the method further comprises;

when a CP of the subframe 0 is configured as a Normal CP and the PRS is configured to transmit only on the MBSFN subframe by the network side, the subframe for transmitting the PRS is not configured to transmit the PDSCH;

wherein when the CP of the subframe 0 is configured as a Normal CP and the PRS is configured to transmit only on the MBSFN subframe by the network side, the receiving side does not expect to receive the PDSCH on the subframe which transmits the PRS when receiving the channels or signals of the network side;

wherein the network side semi-statically configures the period and subframe bias of the PRS, and notifies the relative configuration of the PRS to the receiving side via the broadcast channel, and then the network side configures the OFDM CPs of all the PRS subframes according to the CP configuration type of the subframe 0.

2. The method according to claim 1, further comprising:

wherein a subframe configured to transmit the PRS by the network side is not configured to transmit the CSI-RS;

or a subframe configured to transmit the CSI-RS by the network side is not configured to transmit the PRS;

or wherein a subframe configured to transmit the PRS only in a Multiple Broadcast Single Frequency Network (MBSFN) subframe by the network side is not configured to transmit the CSI-RS;

or a subframe configured to transmit the CSI-RS by the network side is not configured to transmit the PRS which is transmitted only in the MBSFN subframe;

or wherein when the CP of the subframe 0 is configured as a Normal CP by the network side, the subframe configured to transmit the PRS by the network side is not configured to transmit the CSI-RS;

or when the CP of the subframe 0 is configured as the Normal CP by the network side, the subframe configured to transmit the CSI-RS by the network side is not configured to transmit the PRS;

or wherein when the CP of the subframe 0 is configured as a Normal CP by the network side, the subframe configured to transmit the PRS only in the MBSFN subframe by the network side is not configured to transmit the CSI-RS;

or when the CP of the subframe 0 is configured as the Normal CP by the network side, the subframe configured to transmit the CSI-RS by the network side is not configured to transmit the PRS which is transmitted only in the MBSFN subframe.

3. The method according to claim 1, wherein when the CSI-RS and the PRS are transmitted on the same resource, discarding the CSI-RS, and only transmitting the PRS;

or when the CSI-RS and the PRS are transmitted on the same resource, discarding the PRS, and only transmitting the CSI-RS;

or when the PDSCH and the PRS are transmitted on the same resource element, discarding the resource element of the PDSCH on the position reference part, and only transmitting the PRS;

or when the PDSCH and the PRS are transmitted on the same resource element, discarding the PRS, and only transmitting the resource element of the PDSCH;

or when the Relay backhaul link and the PRS are transmitted on the same resource element, discarding the resource element of the Relay backhaul link on the position reference part, and only transmitting the PRS;

or when the Relay backhaul link and the PRS are transmitted on the same resource element, discarding the PRS, and only transmitting the CSI-RS.

4. The method according to claim 1, further comprising:

wherein a subframe configured to transmit the PRS by the network side is not configured to transmit the PDSCH;

or wherein the CP of the subframe 0 is configured as a Normal CP by the network side, the subframe for transmitting the PRS is not configured to transmit the PDSCH;

or wherein when the PRS is configured to transmit only on the MBSFN subframe by the network side, the subframe for transmitting the PRS is not configured to transmit the PDSCH;

or wherein a subframe configured to transmit the PRS by the network side is not configured to transmit the Relay backhaul link;

or wherein when the CP of the subframe 0 is configured as the Normal CP by the network side, the subframe for transmitting the PRS is not configured to transmit the Relay backhaul link;

or wherein when the PRS is configured to transmit only on the MBSFN subframe by the network side, the subframe for transmitting the PRS is not configured to transmit the Relay backhaul link;

or wherein when the CP of the subframe 0 is configured as a Normal CP and the PRS is configured to transmit only on the MBSFN subframe by the network side, the subframe for transmitting the PRS is not configured to transmit the Relay backhaul link.

5. The method according to claim 1, wherein when the CP of the subframe 0 is configured, by the network side, as a Normal CP and the PRS is configured, by the network side, to transmit only on the MBSFN subframe, an Orthogonal Frequency Division Multiplexing (OFDM), the PRS subframe and the PDSCH subframe are transmitted in the same symbol for transmitting the PDSCH in the MBSFN subframe which transmits the PRS adopts Extended CP;

or when the CP of the subframe 0 is configured as a Normal CP and the PRS is configured to transmit only on the MBSFN subframe by the network side, an OFDM symbol for transmitting the PDSCH in the MBSFN subframe which transmits the PRS adopts Normal CP.

6. A method for transmitting a PRS, comprising:

a receiving side identifying a length of Cyclic Prefix (CP), measuring and receiving signals transmitted by a network side according to the configuration information of a PRS which is issued by the network side and the configuration information of at least one of the corresponding Channel State Information Reference Signal (CSI-RS), the corresponding transmission Physical Downlink Shared Channel (PDSCH) and the corresponding Relay backhaul link;

wherein the PRS is configured by the network side according to the configuration condition of at least one of a CSI-RS, a transmission PDSCH and a Relay backhaul link, or at least one of the CSI-RS, the transmission PDSCH and the Relay backhaul link is configured by the network side according to the configuration condition of the PRS;

wherein the method further comprises;

when a CP of the subframe 0 is configured as a Normal CP and the PRS is configured to transmit only on the MBSFN subframe by the network side, the subframe for transmitting the PRS is not configured to transmit the PDSCH;

wherein when the CP of the subframe 0 is configured as a Normal CP and the PRS is configured to transmit only on the MBSFN subframe by the network side, the receiving side does not expect to receive the PDSCH on the subframe which transmits the PRS when receiving the channels or signals of the network side;

wherein the method further comprises;

the receiving side receives the relative configuration of the PRS, which is obtained by configuring, by the network side, the period and subframe bias of the PRS, via the broadcast channel.

7. The method according to claim 6, further comprising:

wherein the receiving side receiving the CSI-RS is not on the subframe which transmits the PRS when receiving the channels or signals of the network side;

or the receiving side receiving the PRS is not on the subframe which transmits the CSI-RS when receiving the channels or signals of the network side;

or wherein the receiving side receiving the CSI-RS is not on the subframe which transmits the PRS only configured on the MBSFN subframe when receiving the channels or signals of the network side;

or the receiving side receiving the PRS which is only configured on the MBSFN subframe is not on the subframe which transmits the CSI-RS when receiving the channels or signals of the network side;

or wherein when the CP of the received subframe 0 is the Normal CP, the receiving side receiving the CSI-RS is not on the subframe which transmits the CSI-RS when receiving the channels or signals of the network side;

or when the CP of the received subframe 0 is the Normal CP, the receiving side receiving the PRS is not on the subframe which transmits the CSI-RS;

or wherein when the CP of the received subframe 0 is the Normal CP, the receiving side receiving the CSI-RS is not on the subframe which transmits the PRS only configured on the MBSFN subframe when receiving the channels or signals of the network side;

or when the CP of the received subframe 0 is the Normal CP, the receiving side receiving the PRS which is only configured on the MBSFN subframe is not on the subframe which transmits the CSI-RS.

8. The method according to claim 6, further comprising:

wherein the receiving side receiving the PDSCH is not on the subframe which transmits the PRS when receiving the channels or signals of the network side;

or wherein the CP of the subframe 0 is configured as the Normal CP by the network side, the receiving side receiving the PDSCH is not on the subframe which transmits the PRS when receiving the channels or signals of the network side;

or wherein when the PRS is configured to transmit only on the MBSFN subframe by the network side, the receiving side receiving the PDSCH is not on the subframe which transmits the PRS when receiving the channels or signals of the network side;

or wherein when the CP of the subframe 0 is configured as a Normal CP and the PRS is configured to transmit only on the MBSFN subframe by the network side, the receiving side does not expect to receive the PDSCH on the subframe which transmits the PRS when receiving the channels or signals of the network side;

or wherein the receiving side receiving the Relay backhaul link is not on the subframe which transmits the PRS when receiving the channels or signals of the network side;

or wherein when the CP of the subframe 0 is configured as the Normal CP by the network side, the receiving side receiving the Relay backhaul link is not on the subframe which transmits the PRS when receiving the channels or signals of the network side;

or wherein when the PRS is configured to transmit only on the MBSFN subframe by the network side, the receiving side receiving the Relay backhaul link is not on the subframe which transmits the PRS when receiving the channels or signals of the network side;

or wherein when the CP of the subframe 0 is configured as a Normal CP and the PRS is configured to transmit only on the MBSFN subframe by the network side, the receiving side does not expect to receive the Relay backhaul link on the subframe which transmits the PRS.

9. The method according to claim 6, wherein when the CP of the subframe 0 is configured, by the network side, as a Normal CP and the PRS is configured, by the network side, to transmit only on the MBSFN subframe, an Orthogonal Frequency Division Multiplexing (OFDM), the PRS subframe and the PDSCH subframe are transmitted in the same symbol for transmitting the PDSCH in the MBSFN subframe which transmits the PRS adopts Extended CP;

or when the CP of the subframe 0 is configured as a Normal CP and the PRS is configured to transmit only on the MBSFN subframe by the network side, an OFDM symbol for transmitting the PDSCH in the MBSFN subframe which transmits the PRS adopts Normal CP.

10. A network side element for transmitting a PRS, comprising:

the network side element configuring at least one of a Channel State Information Reference Signal (CSI-RS), a transmission Physical Downlink Shared Channel (PDSCH) and a Relay backhaul link according to the configuration condition of a PRS, or the network side element configuring the PRS according to the configuration condition of at least one of the CSI-RS, the transmission PDSCH and the Relay backhaul link; and

the network side element transmitting to a receiving side the configuration information of the PRS and the configuration information of at least one of the corresponding CSI-RS, the transmission PDSCH and the Relay backhaul link;

wherein when a CP of the subframe 0 is configured as a Normal CP and the PRS is configured to transmit only on the MBSFN subframe by the network side, the subframe for transmitting the PRS is not configured to transmit the PDSCH;

wherein when the CP of the subframe 0 is configured as a Normal CP and the PRS is configured to transmit only on the MBSFN subframe by the network side, the receiving side does not expect to receive the PDSCH on the subframe which transmits the PRS when receiving the channels or signals of the network side;

wherein the network side element is further configured to semi-statically configure the period and subframe bias of the PRS, and notify the relative configuration of the PRS to the receiving side via the broadcast channel, and then configure the OFDM CPs of all the PRS subframes according to the CP configuration type of the subframe 0.

11. The network side element according to claim 10, further comprising:

wherein a subframe configured to transmit the PRS by the network side element is not configured to transmit the CSI-RS;

or a subframe configured to transmit the CSI-RS by the network side element is not configured to transmit the PRS;

or wherein a subframe configured to transmit the PRS only in a Multiple Broadcast Single Frequency Network (MBSFN) subframe by the network side element is not configured to transmit the CSI-RS;

or a subframe configured to transmit the CSI-RS by the network side element is not configured to transmit the PRS which is transmitted only in the MBSFN subframe;

or wherein when the CP of the subframe 0 is configured as a Normal CP by the network side element, the subframe configured to transmit the PRS by the network side element is not configured to transmit the CSI-RS;

or when the CP of the subframe 0 is configured as the Normal CP by the network side element, the subframe configured to transmit the CSI-RS by the network side element is not configured to transmit the PRS;

or wherein when the CP of the subframe 0 is configured as a Normal CP by the network side element, the subframe configured to transmit the PRS only in the MBSFN subframe by the network side element is not configured to transmit the CSI-RS;

or when the CP of the subframe 0 is configured as the Normal CP by the network side element, the subframe configured to transmit the CSI-RS by the network side element is not configured to transmit the PRS which is transmitted only in the MBSFN subframe.

12. The network side element according to claim 10, wherein when the CSI-RS and the PRS are transmitted on the same resource, discarding the CSI-RS, and only transmitting the PRS;

or when the CSI-RS and the PRS are transmitted on the same resource, discarding the PRS, and only transmitting the CSI-RS;

or when the PDSCH and the PRS are transmitted on the same resource element, discarding the resource element of the PDSCH on the position reference part, and only transmitting the PRS;

or when the PDSCH and the PRS are transmitted on the same resource element, discarding the PRS, and only transmitting the resource element of the PDSCH;

or when the Relay backhaul link and the PRS are transmitted on the same resource element, discarding the resource element of the Relay backhaul link on the position reference part, and only transmitting the PRS;

or when the Relay backhaul link and the PRS are transmitted on the same resource element, discarding the PRS, and only transmitting the CSI-RS.

13. The network side element according to claim 10, further comprising:

wherein a subframe configured to transmit the PRS by the network side element is not configured to transmit the PDSCH;

or wherein the CP of the subframe 0 is configured as a Normal CP by the network side element, the subframe for transmitting the PRS is not configured to transmit the PDSCH;

or wherein when the PRS is configured to transmit only on the MBSFN subframe by the network side element, the subframe for transmitting the PRS is not configured to transmit the PDSCH;

or wherein when the CP of the subframe 0 is configured as a Normal CP and the PRS is configured to transmit only on the MBSFN subframe by the network side element, the subframe for transmitting the PRS is not configured to transmit the PDSCH;

or wherein a subframe configured to transmit the PRS by the network side element is not configured to transmit the Relay backhaul link;

or wherein when the CP of the subframe 0 is configured as the Normal CP by the network side element, the subframe for transmitting the PRS is not configured to transmit the Relay backhaul link;

or wherein when the PRS is configured to transmit only on the MBSFN subframe by the network side element, the subframe for transmitting the PRS is not configured to transmit the Relay backhaul link;

or wherein when the CP of the subframe 0 is configured as a Normal CP and the PRS is configured to transmit only on the MBSFN subframe by the network side element, the subframe for transmitting the PRS is not configured to transmit the Relay backhaul link.

14. The network side element according to claim 10, wherein when the CP of the subframe 0 is configured, by the network side, as a Normal CP and the PRS is configured, by the network side, to transmit only on the MBSFN subframe, an Orthogonal Frequency Division Multiplexing (OFDM), the PRS subframe and the PDSCH subframe are transmitted in the same symbol for transmitting the PDSCH in the MBSFN subframe which transmits the PRS adopts Extended CP;

or when the CP of the subframe 0 is configured as a Normal CP and the PRS is configured to transmit only on the MBSFN subframe by the network side element, an OFDM symbol for transmitting the PDSCH in the MBSFN subframe which transmits the PRS adopts Normal CP.

15. A receiving side element for transmitting a PRS, comprising:

the receiving side element identifying a length of Cyclic Prefix (CP), measuring and receiving signals transmitted by a network side according to the configuration information of a PRS which is issued by the network side and the configuration information of at least one of the corresponding Channel State Information Reference Signal (CSI-RS), the corresponding transmission Physical Downlink Shared Channel (PDSCH) and the corresponding Relay backhaul link;

wherein the PRS is configured by the network side according to the configuration condition of at least one of a CSI-RS, a transmission PDSCH and a Relay backhaul link, or at least one of the CSI-RS, the transmission PDSCH and the Relay backhaul link is configured by the network side according to the configuration condition of the PRS;

wherein when a CP of the subframe 0 is configured as a Normal CP and the PRS is configured to transmit only on the MBSFN subframe by the network side, the subframe for transmitting the PRS is not configured to transmit the PDSCH;

wherein when the CP of the subframe 0 is configured as a Normal CP and the PRS is configured to transmit only on the MBSFN subframe by the network side, the receiving side does not expect to receive the PDSCH on the subframe which transmits the PRS when receiving the channels or signals of the network side;

wherein the receiving side element is further configured to receive the relative configuration of the PRS, which is obtained by configuring, by the network side, the period and subframe bias of the PRS, via the broadcast channel.

16. The receiving side element according to claim 15, further comprising:

wherein the receiving side element receiving the CSI-RS is not on the subframe which transmits the PRS when receiving the channels or signals of the network side;

or the receiving side element receiving the PRS is not on the subframe which transmits the CSI-RS when receiving the channels or signals of the network side;

or wherein the receiving side element receiving the CSI-RS is not on the subframe which transmits the PRS only configured on the MBSFN subframe when receiving the channels or signals of the network side;

or the receiving side element receiving the PRS which is only configured on the MBSFN subframe is not on the subframe which transmits the CSI-RS when receiving the channels or signals of the network side;

or wherein when the CP of the received subframe 0 is the Normal CP, the receiving side element receiving the CSI-RS is not on the subframe which transmits the CSI-RS when receiving the channels or signals of the network side;

or when the CP of the received subframe 0 is the Normal CP, the receiving side element receiving the PRS is not on the subframe which transmits the CSI-RS;

or wherein when the CP of the received subframe 0 is the Normal CP, the receiving side element receiving the CSI-RS is not on the subframe which transmits the PRS only configured on the MBSFN subframe when receiving the channels or signals of the network side;

or when the CP of the received subframe 0 is the Normal CP, the receiving side element receiving the PRS which is only configured on the MBSFN subframe is not on the subframe which transmits the CSI-RS.

17. The receiving side element according to claim 15, further comprising:

wherein the receiving side element receiving the PDSCH is not on the subframe which transmits the PRS when receiving the channels or signals of the network side;

or wherein the CP of the subframe 0 is configured as the Normal CP by the network side, the receiving side element receiving the PDSCH is not on the subframe which transmits the PRS when receiving the channels or signals of the network side;

or wherein when the PRS is configured to transmit only on the MBSFN subframe by the network side, the receiving side element receiving the PDSCH is not on the subframe which transmits the PRS when receiving the channels or signals of the network side;

or wherein when the CP of the subframe 0 is configured as a Normal CP and the PRS is configured to transmit only on the MBSFN subframe by the network side, the receiving side element does not expect to receive the PDSCH on the subframe which transmits the PRS when receiving the channels or signals of the network side.

18. The receiving side element according to claim 15, further comprising:

wherein the receiving side element receiving the Relay backhaul link is not on the subframe which transmits the PRS when receiving the channels or signals of the network side;

or wherein when the CP of the subframe 0 is configured as the Normal CP by the network side, the receiving side element receiving the Relay backhaul link is not on the subframe which transmits the PRS when receiving the channels or signals of the network side;

or wherein when the PRS is configured to transmit only on the MBSFN subframe by the network side, the receiving side element receiving the Relay backhaul link is not on the subframe which transmits the PRS when receiving the channels or signals of the network side;

or wherein when the CP of the subframe 0 is configured as a Normal CP and the PRS is configured to transmit only on the MBSFN subframe by the network side, the receiving side element does not expect to receive the Relay backhaul link on the subframe which transmits the PRS.

19. The receiving side element according to claim 15, wherein when the CP of the subframe 0 is configured, by the network side, as a Normal CP and the PRS is configured, by the network side, to transmit only on the MBSFN subframe, an Orthogonal Frequency Division Multiplexing (OFDM) and the PRS subframe are transmitted in the same symbol for transmitting the PDSCH in the MBSFN subframe which transmits the PRS adopts Extended CP;

or when the CP of the subframe 0 is configured as a Normal CP and the PRS is configured to transmit only on the MBSFN subframe by the network side element, an OFDM symbol for transmitting the PDSCH in the MBSFN subframe which transmits the PRS adopts Normal CP.