Method for providing tracking reference signals in idle mode and user equipment thereof

Abstract

A method for providing a Tracking Reference Signal (TRS) for power consumption improvement is proposed. A User Equipment (UE) operates in an idle mode communicating with a wireless communication network; and when the UE is in this idle mode, it receives a System Information Block (SIB) or Early Paging Indication (PEI) from the wireless communication network. The received System Information Block or Early Paging Indication includes a Tracking Reference Signal (TRS) configuration. When the UE is in this idle mode, it detects the Tracking Reference Signal from the wireless communication network based on this TRS configuration.

Description

[0001] CROSS-REFERENCE

[0002] This application claims priority under 35 U.S.C. § 119 to U.S. Provisional Patent Application No. 63 / 061208, filed August 5, 2020, and entitled “R17 Idle mode power saving potential TRS,” which is hereby incorporated by reference in its entirety. TECHNICAL FIELD

[0003] The present disclosure relates to wireless communication systems. In particular, the present disclosure relates to power saving enhancement mechanisms for tracking reference signals (TRS) in idle mode. BACKGROUND

[0004] Wireless communication networks have grown exponentially over the years. Long-Term Evolution (LTE) systems provide high peak data rates, low latency, improved system capacity, and low operating cost due to simple network architecture. LTE systems, also referred to as 4G systems, also provide seamless integration of old wireless networks, e.g., GSM, CDMA, and Universal Mobile Telecommunication System (UMTS). In LTE systems, an evolved universal terrestrial radio access network (E-UTRAN) includes a plurality of evolved Node Bs (eNodeBs or eNBs) that communicate with a plurality of mobile stations, referred to as user equipment (UE). Third Generation Partnership Project (3GPP) networks typically include hybrid 2G / 3G / 4G systems. As network designs are optimized, many improvements have emerged in the evolution of various standards. The Next Generation Mobile Network (NGMN) Board has decided to focus future NGMN activities on defining end-to-end requirements for the 5G New Radio (NR) system (5GS).

[0005] In 5G NR, various types of reference signals are introduced, including demodulation reference signal (DMRS), phase-tracking reference signal (PT-RS), sounding reference signal (SRS), channel state information reference signal (CSI-RS), and tracking reference (TRS), and each type of reference signal has a specific purpose. For example, TRS is a sparse reference signal intended to assist time and frequency tracking for connected mode UEs, and TRS configuration is carried in a specific information element (IE) and is only available through radio resource control (RRC) signaling in connected mode. On the other hand, an idle mode UE needs to receive multiple synchronization signal blocks (SSBs) before each paging occasion (PO) and SSB-based measurement timing configuration (SMTC) window to obtain sufficient time and frequency tracking information. Since SSB is a periodic signal, the idle mode UE needs to wake up from sleep mode multiple times to receive SSB. Even though going to sleep mode when there is no SSB transmission can save power consumption of the idle mode UE, constantly waking up the UE to receive SSB is still an inefficient power saving way.

[0006] A solution is provided. SUMMARY

[0007] A method for providing tracking reference signal (TRS) for power consumption improvement is proposed. A user equipment (UE) operates in an idle mode for communicating with a wireless communication network; and receives a system information block (SIB) or a paging early indication (PEI) from the wireless communication network when the user equipment is in the idle mode. Wherein, the received system information block or paging early indication comprises a tracking reference signal (TRS) configuration. A tracking reference signal from the wireless communication network is detected based on the tracking reference signal configuration when the user equipment is in the idle mode.

[0008] On the other hand, when a UE operates in an idle mode for communicating with a wireless communication network, the wireless communication network sends a SIB or a PEI to the UE. Wherein, the sent SIB or PEI comprises a TRS configuration. The wireless communication network sends a TRS to the UE in the idle mode based on the TRS configuration.

[0009] In an embodiment, the UE performs time and / or frequency tracking in the idle mode based on the detected tracking reference signal; and enters a sleep mode for a period of time based on the performed time and / or frequency tracking, wherein the period of time spans one or more timings configured for receiving a synchronization signal block (SSB). In the example, the step of entering the sleep mode is performed by skipping the one or more timings configured for receiving the synchronization signal block.

[0010] In this embodiment, the system information block is an existing type system information block in the 3GPP standard for fifth-generation new radio (NR), or a new type system information block introduced in the 3GPP standard for NR. In the example, the existing type system information block is a type 2 system information block, or the new type system information block is a type 15 system information block.

[0011] In an embodiment, the tracking reference signal configuration includes information about a periodic non-zero power (NZP) channel state information reference signal (CSI-RS) resource set, and tracking reference signal information (i.e., trs-info) configured for the tracking reference signal using the non-zero power channel state information reference signal resource set. In the example, each of the non-zero power channel state information reference signal resource sets includes at least one of the following: (1) an information element (IE) indicating frequency domain resource allocation; (2) an information element indicating time domain allocation of the first orthogonal frequency division multiplexing (OFDM) symbol in the physical resource block (PRB) for the channel state information reference signal; (3) an information element indicating the number of consecutive time slots containing the tracking reference signal; (4) an information element indicating the physical resource block of the channel state information resource on the common resource block grid relative to common resource block #0 (CRB#0); (5) an information element indicating the number of physical resource blocks spanning the channel state information resource; (6) an information element indicating the power offset from the physical downlink shared channel (PDSCH) resource element (RE) to the non-zero power channel state information reference signal resource element; (7) an information element indicating the power offset from the non-zero power channel state information reference signal resource element to the auxiliary synchronization signal (SSS) resource element; (8) one or more information elements indicating one or more scrambling identities; and (9) an information element indicating the period and corresponding time slot offset. In the example, the scrambled identity is configured with consecutive numbers, or only the first or last scrambled identity is configured with numbers.

[0012] Other embodiments and advantages are described in detail below. This summary is not intended to limit the invention. The invention is defined by the claims. Attached Figure Description

[0013] The following figures illustrate embodiments of the present invention, wherein the same reference numerals denote the same components.

[0014] FIG. 1 An example 5G New Radio (NR) network 100 supporting an idle mode tracking reference signal (TRS) is described according to aspects of the present invention.

[0015] FIG. 2 This is a simplified block diagram of wireless devices 201 and 211 according to an embodiment of the present invention.

[0016] FIG. 3 According to a novel aspect of the present invention, a concept for providing TRS in idle mode to achieve additional energy savings is described.

[0017] FIG. 4 The generation of TRS for an idle mode UE is described according to a novel aspect of the present invention.

[0018] FIG. 5 An exemplary structure for a TRS configuration is described according to a novel aspect of the present invention.

[0019] FIG. 6 This is a flowchart of a method for providing TRS in idle mode for power consumption improvement from the perspective of a UE, according to a novel aspect of the present invention.

[0020] FIG. 7 This is a flowchart of a method for providing TRS in idle mode for power consumption improvement from a network perspective according to a novel aspect of the present invention. Detailed Implementation

[0021] Reference will now be made in detail to embodiments of the present invention, examples of which are shown in the accompanying drawings.

[0022] FIG. 1An example 5G New Radio (NR) network 100 supporting an Idle Mode Tracking Reference Signal (TRS) is described according to aspects of the present invention. The 5G NR network 100 includes a User Equipment (UE) 110 communicatively connected to a gNB 121, wherein the gNB 121 operates in a licensed frequency band (e.g., 30 GHz to 300 GHz millimeter wave) of an access network 120, and the access network 120 provides radio access using a Radio Access Technology (RAT) (e.g., 5G NR technology). The access network 120 is connected to a 5G core network 130 via an NG interface, and more specifically, to a User Plane Function (UPF) via an NG User Plane Part (NG-u), and to a Mobility Management Function (AMF) via an NG Control Plane Part (NG-c). A gNB can connect to multiple UPFs / AMFs for load sharing and redundancy. The UE 110 may be a smartphone, wearable device, Internet of Things (IoT) device, tablet, etc. Alternatively, the UE 110 can be a notebook computer (NB) or personal computer (PC) with an inserted or installed data card, which includes a modem and a radio frequency (RF) transceiver to provide wireless communication capabilities.

[0023] gNB 121 can provide communication coverage for a geographic coverage area, supporting communication with UE 110 via communication link 101 within that area. Communication link 101 between gNB 121 and UE 110 can utilize one or more frequency carriers to form one or more cells (e.g., PCell and one or more SCells). Communication link 101 shown in the 5G NR network 100 can include uplink transmissions from UE 110 to gNB 121 (e.g., on the Physical Uplink Control Channel (PUCCH) or Physical Uplink Shared Channel (PUSCH)) and / or downlink transmissions from gNB 121 to UE 110 (e.g., on the Physical Downlink Control Channel (PDCCH) or Physical Downlink Shared Channel (PDSCH)).

[0024] According to a novel aspect, when UE 110 operates in idle mode (e.g., RRC IDLE mode), downlink transmissions on communication link 101 may carry a System Information Block (SIB) including TRS configuration (e.g., an existing SIB, such as a Type 2 SIB, or a new SIB, such as a Type 15 SIB) or a Paging Early Indication (PEI) (e.g., a PDCCH-based PEI or a PEI based on an SSS / TRS sequence). The idle-mode UE 110 can then detect a TRS from the wireless communication network based on the TRS configuration and perform time and / or frequency tracking in idle mode based on the detected TRS. Based on the performed time and / or frequency tracking, the idle-mode UE 110 may enter a sleep mode for a period of time to reduce power consumption, wherein this period spans one or more times configured for receiving Synchronization Signal Blocks (SSBs).

[0025] FIG. 2 This is a simplified block diagram 200 of wireless devices 201 and 211 according to embodiments of the present invention. For wireless device 201 (e.g., a base station), antennas 205 and 206 transmit and receive radio signals. An RF transceiver module 204 coupled to antennas 205 and 206 receives RF signals from antennas 205 and 206, converts them into baseband signals, and sends them to processor 203. RF transceiver module 204 also receives baseband signals from processor 203, converts them into RF signals, and sends them to antennas 205 and 206. Processor 203 processes the received baseband signals and invokes different functional modules and circuits 207 to perform functions in wireless device 201. Memory 202 stores program instructions and data 221 to control the operation of wireless device 201.

[0026] Similarly, for wireless device 211 (e.g., UE), antennas 215 and 216 transmit and receive RF signals. An RF transceiver module 214, coupled to antennas 215 and 216, receives the RF signals from antennas 215 and 216, converts them into baseband signals, and sends them to processor 213. The RF transceiver module 214 also converts the received baseband signals from processor 213 into radio frequency signals and sends them to antennas 215 and 216. Processor 213 processes the received baseband signals and invokes different functional modules and circuits 217 to perform functions in wireless device 211. Memory 212 stores program instructions and data 231 to control the operation of wireless device 211.

[0027] In wireless devices 201 and 211, functional modules and circuits 207 and 217 can be implemented and configured to perform embodiments of the present invention. FIG. 2In the example, wireless device 201 is a base station (e.g., gNB) including state configurator circuit 222, SIB / PEI transmitter (Tx) circuit 223 and TRS transmission circuit 224, wherein the state configurator circuit 222 configures wireless device 211 to operate in an idle mode for communicating with wireless device 201, the SIB / PEI transmitter (Tx) circuit 223 transmits an SIB / PEI including a TRS configuration to wireless device 211, and the TRS transmission circuit 224 transmits a TRS configuration to wireless device 211. Wireless device 211 is a UE including state configurator circuit 232, SIB / PEI receiver (Rx) circuit 233, and TRS detection circuit 234. The state configurator circuit 232 configures wireless device 211 to operate in an idle mode communicating with wireless device 201. When wireless device 211 is in idle mode, SIB / PEI receiver (Rx) circuit 233 receives SIB / PEI including TRS configuration from wireless device 201. And when wireless device 211 is in idle mode, TRS detection circuit 234 detects TRS from wireless device 201 based on the TRS configuration. It is worth noting that the wireless device can be both a transmitting and receiving device. Different functional modules and circuits can be implemented and configured through software, firmware, hardware, and any combination thereof. When executed by processors 203 and 213 (e.g., by executing program code 221 and 231), the functional modules and circuits allow base station 201 and UE 211 to perform embodiments of the present invention.

[0028] FIG. 3 According to a novel aspect of the present invention, a concept for providing TRS in idle mode to achieve additional energy savings is described. FIG. 3 Figure 310 depicts the SSB transmission scheme in NR, where LOOP operations (including AGC, FTL, and TTL) and measurement (MEAS) can only be performed under certain conditions, such as during SSB bursts. The UE is woken up for an SSB, for example, every 20 milliseconds (every two radio frames). The UE can enter a shallow sleep mode (e.g., a first power-saving mode with higher power consumption) during the gap between the SSB used for LOOP / MEAS and the paging timing (PO). When a TRS is introduced for idle mode UEs, the UE can skip one or more timings configured for SSB reception, for example, entering a deep sleep mode (e.g., a second power-saving mode with lower power consumption) in 321. It is worth noting that low SINR UEs need to be woken up earlier, i.e., more SSB bursts (larger N) need to be monitored before the paging message can be decoded. SSB Wake up the high SINR UE before PO monitoring.

[0029] More specifically, a TRS is a periodic non-zero power channel state information reference signal resource set (nzp-CSI-RS-ResourceSet) configured with tracking reference signal information (trs-Info) and consisting of 2 or 4 non-zero power channel state information reference signal resources (nzp-CSI-RS-Resource). Each nzp-CSI-RS-Resource resource is 1 port with a density of 3. A UE (e.g., an idle mode UE) can be configured with one or more NZP CSI-RS sets containing tracking reference signal information. The TRS should not have a CSI reporting configuration (CSI-ReportConfig) (CSI reporting for the TRS is not required). Periodic TRS can be configured with a period of 10, 20, 40, or 80 milliseconds. The bandwidth (BW) of the TRS is 52 and... The minimum value among the resource blocks, or equal to One resource block. FIG. 4 According to a novel aspect of the invention, the generation of a TRS for an idle-mode UE is described. An exemplary TRS structure is shown as having four single-port, density 3 CSI-RS configured over two consecutive time slots. The two CSI-RS within a time slot are always separated by four symbols in the time domain. FIG. 4 In the example, periodic NZP CSI-RS consists of 2 resources per time slot. For 5G NR in frequency range 1 (FR1), periodic NZP CSI-RS consists of 4 resources in 2 consecutive time slots. For 5G NR in FR2, periodic NZP CSI-RS consists of 4 resources in 2 consecutive time slots or 2 resources in one time slot.

[0030] Therefore, TRS configuration includes information about one or more periodic NZP CSI-RS resource sets and TRS information (i.e., trs-Info) for configuring NZP CSI-RS resource sets for TRS. Specifically, the information for each NZP CSI-RS resource set may include any combination of the following: (1) a “frequecyDomainAllocation” information element (IE) indicating frequency domain resource allocation; (2) a “firstOFDMSymbolInTimeDomain” IE indicating time domain allocation of the first orthogonal frequency division multiplexing (OFDM) symbol in the physical resource block (PRB) for the CSI-RS; (3) a “nrofSlots” IE indicating the number of consecutive time slots containing TRS; (4) a “startingRB” IE indicating the PRB that the CSI resource starts with relative to the public resource block #0 (CRB#0) on the public resource block grid; (5) a “nrofRBs” IE indicating the number of PRBs spanning the CSI resource; (6) a “powerControlOffset” IE indicating the power offset from the physical downlink shared channel (PDSCH) resource element (RE) to the NZP CSI-RS RE; and (7) an information element indicating the NZP CSI-RS resource allocation. (8) The "powerControlOffsetSS" IE indicates the power offset from the RE to the auxiliary synchronization signal (SSS) RE; (9) The "scramblingID1" to "scramblingID4" IE indicates multiple scrambling IDs used for the scrambling channel and the reference signal; and (10) The "periodicityAndOffset" IE indicates the period and corresponding time slot offset. In one example, the scrambling IDs are configured with consecutive numbers (e.g., configured with consecutive numbers, such as scramblingID1=42, scramblingID2=43, scramblingID3=44, scramblingID4=45). In another example, only the first or last scrambling ID is configured with numbers (e.g., 42 or 45), and the UE can apply consecutive numbers to the remaining scrambling IDs (e.g., 43 to 45 or 42 to 44). FIG. 5 An exemplary structure for a TRS configuration is described according to a novel aspect of the present invention.

[0031] To further clarify, the "frequecyDomainAllocation" ID is 4 bits long, the "firstOFDMSymbolInTimeDomain" IE is 4 bits long, the "nrofSlots" IE is 1 bit long, the "startingRB" IE is 9 bits long, the "nrofRBs" IE is 8 bits long, the "powerControlOffset" IE is 5 bits long, the "powerControlOffsetSS" IE is 2 bits long, each of the "scramblingID1" to "scramblingID4" IEs is 10 bits long, and the "periodicityAndOffset" IE is 14 bits long. In other words, the total size of the TRS configuration is 87 bits, which is much smaller than the SIB's upper limit (i.e., 2976 bits).

[0032] FIG. 6 This is a flowchart of a method for providing TRS in idle mode for power consumption improvement from the UE perspective according to a novel aspect of the present invention. In step 610, the UE operates in an idle mode (e.g., RRC_IDLE mode) communicating with a wireless communication network (e.g., a 5G NR network). In step 620, when the UE is in idle mode, the UE receives an SIB or PEI from the wireless communication network, wherein the received SIB or PEI includes a TRS configuration. In step 630, when the UE is in idle mode, the UE detects a TRS from the wireless communication network based on the TRS configuration.

[0033] FIG. 7 This is a flowchart of a method for providing TRS in idle mode for power consumption improvement from a network perspective according to a novel aspect of the present invention. In step 710, when the UE is operating in idle mode communicating with the wireless communication network, the wireless communication network sends an SIB or PEI to the UE, wherein the sent SIB or PEI includes a TRS configuration. In step 720, the wireless communication network sends a TRS to the UE in idle mode based on the TRS configuration.

[0034] While the present invention has been disclosed above with reference to specific embodiments, it is not intended to limit the invention. Therefore, various adjustments, modifications, or combinations can be made to the various features of the described embodiments without departing from the scope of the invention, and the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A method for providing a tracking reference signal in idle mode, comprising: The user equipment operates in idle mode, communicating with the wireless communication network. When the user equipment is in the idle mode, it receives a system information block or paging early indication from the wireless communication network, wherein... The received system information block or paging early indication includes a tracking reference signal configuration, wherein the tracking reference signal configuration contains information about a periodic non-zero power channel state information reference signal resource set, and tracking reference signal information configuring the non-zero power channel state information reference signal resource set for tracking reference signals; and When the user equipment is in the idle mode, it detects the tracking reference signal from the wireless communication network based on the tracking reference signal configuration.

2. The method for providing a tracking reference signal in idle mode as described in claim 1, characterized in that, Further includes: Based on the detected tracking reference signal, time and / or frequency tracking is performed in this idle mode; and Based on the time and / or frequency tracking performed, the system enters a sleep mode for a period of time, which spans one or more time points configured for synchronizing signal block reception.

3. The method for providing a tracking reference signal in idle mode as described in claim 2, characterized in that, The step of entering the sleep mode is performed by skipping one or more of the timings configured for receiving the synchronization signal block.

4. The method for providing a tracking reference signal in idle mode as described in claim 1, characterized in that, The system information block is either an existing type of system information block in the 3rd Generation Partnership Project standard for fifth-generation new radio, or a new type of system information block introduced into the 3rd Generation Partnership Project standard for fifth-generation new radio.

5. The method for providing a tracking reference signal in idle mode as described in claim 4, characterized in that, The existing type system information block is a type 2 system information block, or the new type system information block is a type 15 system information block.

6. The method for providing a tracking reference signal in idle mode as described in claim 1, characterized in that, The information in this non-zero power channel state information reference signal resource set includes at least one of the following information elements: Information elements indicating frequency domain resource allocation; Information elements indicating the time-domain allocation of the first orthogonal frequency division multiplexing symbol in the physical resource block used for the channel state information reference signal; Information elements indicating the number of consecutive time slots containing the tracking reference signal; Information elements indicating channel state information resources relative to physical resource blocks starting from common resource block #0 on the common resource block grid; An information element indicating the number of physical resource blocks spanning the channel state information resource; An information element indicating the power offset from the physical downlink shared channel resource element to the non-zero power channel state information reference signal resource element; An information element indicating the power offset from the non-zero power channel state information reference signal resource element to the auxiliary synchronization signal resource element; One or more information elements indicating one or more scrambled identities; as well as Information elements indicating the period and corresponding time slot offset.

7. The method for providing a tracking reference signal in idle mode as described in claim 6, characterized in that, The scrambling identifier is configured with consecutive numbers, or with numbers configured only for the first or last scrambling identifier.

8. A user equipment for providing a tracking reference signal in idle mode, comprising: A state configurator circuit is used to configure the user equipment to operate in an idle mode that communicates with the wireless communication network. Receiver circuitry is configured to receive system information blocks or paging early indications from the wireless communication network when the user equipment is in the idle mode, wherein... The received system information block or paging early indication includes a tracking reference signal configuration, wherein the tracking reference signal configuration includes information on a periodic non-zero power channel state information reference signal resource set, and tracking reference signal information configured for the non-zero power channel state information reference signal resource set for tracking reference signals; as well as A tracking reference signal detection circuit is used to detect a tracking reference signal from the wireless communication network based on the tracking reference signal configuration when the user equipment is in the idle mode.

9. The user equipment as claimed in claim 8, characterized in that, The user equipment performs time and / or frequency tracking in the idle mode based on the detected tracking reference signal; And based on the time and / or frequency tracking performed, enter sleep mode for a period of time, which spans one or more times configured for receiving synchronous signal blocks.

10. The user equipment as claimed in claim 9, characterized in that, The step of entering the sleep mode is performed by skipping one or more of the timings configured for receiving the synchronization signal block.

11. The user equipment as claimed in claim 8, characterized in that, The system information block is either an existing type of system information block in the 3rd Generation Partnership Project standard for fifth-generation new radio, or a new type of system information block introduced into the 3rd Generation Partnership Project standard for fifth-generation new radio.

12. The user equipment as claimed in claim 11, characterized in that, The existing type system information block is a type 2 system information block, or the new type system information block is a type 15 system information block.

13. The user equipment as claimed in claim 8, characterized in that, The information in this non-zero power channel state information reference signal resource set includes at least one of the following information elements: Information elements indicating frequency domain resource allocation; Information elements indicating the time-domain allocation of the first orthogonal frequency division multiplexing symbol in the physical resource block used for the channel state information reference signal; Information elements indicating the number of consecutive time slots containing the tracking reference signal; Information elements indicating channel state information resources relative to physical resource blocks starting from common resource block #0 on the common resource block grid; An information element indicating the number of physical resource blocks spanning the channel state information resource; An information element indicating the power offset from the physical downlink shared channel resource element to the non-zero power channel state information reference signal resource element; An information element indicating the power offset from the non-zero power channel state information reference signal resource element to the auxiliary synchronization signal resource element; One or more information elements indicating one or more scrambled identities; as well as Information elements indicating the period and corresponding time slot offset.

14. The user equipment as claimed in claim 13, characterized in that, The scrambling identifier is configured with consecutive numbers, or with numbers configured only for the first or last scrambling identifier.

15. A method for providing a tracking reference signal in idle mode, comprising: When the user equipment is operating in idle mode communicating with the wireless communication network, a system information block or paging early indication is sent to the user equipment through the wireless communication network, wherein... The transmitted system information block or paging early indication includes a tracking reference signal configuration, wherein the tracking reference signal configuration contains information about a periodic non-zero power channel state information reference signal resource set, and tracking reference signal information configuring the non-zero power channel state information reference signal resource set for tracking reference signals; and Through this wireless communication network, a tracking reference signal is transmitted to the user equipment in the idle mode based on the tracking reference signal configuration.

16. The method for providing a tracking reference signal in idle mode as described in claim 15, characterized in that, The system information block is an existing type system information block in the 3rd Generation Partnership Project standard for fifth-generation new radio, or a new type system information block introduced in the 3rd Generation Partnership Project standard for fifth-generation new radio, wherein the existing type system information block is a type 2 system information block, or the new type system information block is a type 15 system information block.

17. The method for providing a tracking reference signal in idle mode as described in claim 15, characterized in that, The information in this non-zero power channel state information reference signal resource set includes at least one of the following information elements: Information elements indicating frequency domain resource allocation; Information elements indicating the time-domain allocation of the first orthogonal frequency division multiplexing symbol in the physical resource block used for the channel state information reference signal; Information elements indicating the number of consecutive time slots containing the tracking reference signal; Information elements indicating channel state information resources relative to physical resource blocks starting from common resource block #0 on the common resource block grid; An information element indicating the number of physical resource blocks spanning the channel state information resource; An information element indicating the power offset from the physical downlink shared channel resource element to the non-zero power channel state information reference signal resource element; An information element indicating the power offset from the non-zero power channel state information reference signal resource element to the auxiliary synchronization signal resource element; One or more information elements indicating one or more scrambled identities; as well as Information elements indicating the period and corresponding time slot offset.

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