Signaling arrangement for wireless system

Patent metadata

Field	Value
Publication number	US-2016043841-A1
Application number	US-201414451613-A
Country	US
Kind code	A1
Filing date	Aug 5, 2014
Priority date	Aug 5, 2014
Publication date	Feb 11, 2016
Grant date	—

Abstract

Systems, methods, apparatuses, and computer program products for a signaling arrangement for a wireless system are provided. One method includes transmitting a short control signaling (SCS) message to one or more user equipment (UE). The SCS message may comprise at least a reference signal part and an optional control signal part. The reference signal part may comprise reference signals that allow the UE to perform at least one of: cell search, synchronization, fine time/frequency tracking, radio resource management (RRM) measurements, radio link monitoring, or channel state information (CSI) reporting. In an embodiment, the control signal part may indicate at least one of: whether the cell is ON or OFF, whether each subframe in a current or upcoming set of subframes are ON or OFF, TDD uplink-downlink configuration for a current or upcoming radio frame, PLMN ID to identify to which operator's network the cell belongs to, and/or system information.

First claim

We claim:

1 . A method, comprising:
transmitting a short control signaling (SCS) message to at least one user equipment (UE), wherein the short control signaling (SCS) message comprises at least a reference signal part and an optional control signal part, and wherein the reference signal part comprises reference signals that allow the at least one user equipment (UE) to perform at least one of cell search, synchronization, fine time/frequency tracking, radio resource management (RRM) measurements, radio link monitoring, or channel state information (CSI) reporting.

2 . The method according to claim 1 , wherein the reference signal part comprises signals present in discovery signals including at least one of primary synchronization signal (PSS), secondary synchronization signal (SSS), cell-specific reference signal (CRS) or channel state information (CSI) reference signals (RS).

3 . The method according to claim 1 , wherein the short control signaling (SCS) message is transmitted without a Clear Channel Assessment (CCA) or listening-before-talk (LBT) procedure.

4 . The method according to claim 1 , wherein the control signal part indicates at least one of: whether a cell is ON or OFF, whether each subframe in a current or upcoming set of subframes are ON or OFF, time division duplex (TDD) uplink-downlink configuration for a current or upcoming radio frame, public land mobile network identifier (PLMN ID) to identify to which operator's network the cell belongs to, or system information.

5 . The method according to claim 1 , wherein the control signal part is transmitted in a same orthogonal frequency division multiplexing (OFDM) symbol(s) as also used by a portion of the reference signal part.

6 . The method according to claim 1 , wherein the transmitting comprises transmitting the SCS message with a periodicity of 5, 10, 15, 20, 40, 80, or 160 milliseconds.

7 . The method according to claim 1 , wherein the transmitting comprises transmitting the SCS message in at least one of subframe # 0 or subframe # 5 of a radio frame.

8 . An apparatus, comprising:
at least one processor; and at least one memory including computer program code, the at least one memory and computer program code configured, with the at least one processor, to cause the apparatus at least to transmit a short control signaling (SCS) message to at least one user equipment (UE), wherein the short control signaling (SCS) message comprises at least a reference signal part and an optional control signal part, and wherein the reference signal part comprises reference signals that allow the at least one user equipment (UE) to perform at least one of cell search, synchronization, fine time/frequency tracking, radio resource management (RRM) measurements, radio link monitoring, or channel state information (CSI) reporting.

9 . The apparatus according to claim 8 , wherein the reference signal part comprises signals present in discovery signals including at least one of primary synchronization signal (PSS), secondary synchronization signal (SSS), cell-specific reference signal (CRS) or channel state information (CSI) reference signals (RS).

10 . The apparatus according to claim 8 , wherein the short control signaling (SCS) message is transmitted without a Clear Channel Assessment (CCA) or listening-before-talk (LBT) procedure.

11 . The apparatus according to claim 8 , wherein the control signal part indicates at least one of: whether the cell is ON or OFF, whether each subframe in a current or upcoming set of subframes are ON or OFF, time division duplex (TDD) uplink-downlink configuration for a current or upcoming radio frame, public land mobile network identifier (PLMN ID) to identify to which operator's network the cell belongs to, or system information.

12 . The apparatus according to claim 8 , wherein the control signal part is transmitted in a same orthogonal frequency division multiplexing (OFDM) symbol(s) as also used by a portion of the reference signal part.

13 . The apparatus according to claim 8 , wherein the SCS message is transmitted with a periodicity of 5, 10, 15, 20, 40, 80, or 160 milliseconds.

14 . The apparatus according to claim 8 , wherein the SCS message is transmitted at a beginning of a channel reservation window (CRW).

15 . The apparatus according to claim 8 , wherein the control signal part is transmitted using physical downlink control channel (PDCCH) format, and wherein the control signal part comprises at least one downlink control information (DCI) message.

16 . The apparatus according to claim 8 , wherein the at least one memory and the computer program code are further configured, with the at least one processor, to cause the apparatus at least to define a specific physical downlink control channel (PDCCH) search space for the control signal part.

17 . The apparatus according to claim 8 , wherein the at least one memory and the computer program code are further configured, with the at least one processor, to cause the apparatus at least to scramble a cyclic redundancy check (CRC) of the control signal part with a radio network temporary identifier (RNTI), and signal the RNTI to the at least one user equipment (UE) via radio resource control signaling via a cell on which a Clear Channel Assessment (CCA) or listening-before-talk (LBT) procedure is not used.

18 . A method, comprising:
receiving, by a user equipment (UE), a short control signaling (SCS) message from a network node, wherein the short control signaling (SCS) message comprises at least a reference signal part and an optional control signal part, and wherein the reference signal part comprises reference signals that allow the user equipment (UE) to perform at least one of cell search, synchronization, fine time/frequency tracking, radio resource management (RRM) measurements, radio link monitoring, or channel state information (CSI) reporting.

19 . The method according to claim 18 , wherein, when the SCS message does comprise the control signal part, the method further comprises determining, by the UE, cell-specific information including whether one or more of the upcoming subframes are not used for data communication.

20 . An apparatus, comprising:
at least one processor; and at least one memory including computer program code, the at least one memory and computer program code configured, with the at least one processor, to cause the apparatus at least to receive a short control signaling (SCS) message from a network node, wherein the short control signaling (SCS) message comprises at least a reference signal part and an optional control signal part, and wherein the reference signal part comprises reference signals that allow the apparatus to perform at least one of cell search, synchronization, fine time/frequency tracking, radio resource management (RRM) measurements, radio link monitoring, or channel state information (CSI) reporting.

21 . The apparatus according to claim 20 , wherein the short control signaling (SCS) message is transmitted without a Clear Channel Assessment (CCA) or listening-before-talk (LBT) procedure.

22 . The apparatus according to claim 20 , wherein the control signal part indicates at least one of: whether a cell is ON or OFF, whether each subframe in a current or upcoming set of subframes are ON or OFF, time division duplex (TDD) uplink-downlink configuration for a current or upcoming radio frame, public land mobile network identifier (PLMN ID) to i

Assignees

• Nokia Corp

Inventors

• Lunttila Timo
• Hugl Klaus
• Tiirola Esa
• Hooli Kari

Classifications

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04W48/12

  using downlink control channel · CPC title

• H04L5/0098

  Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands · CPC title

• H04L27/26

  Systems using multi-frequency codes (H04L27/32 takes precedence) · CPC title