Search

EP-4742761-A1 - TRANSMISSION OF INDICATION TO ON-DEMAND SIB1 RECEPTION

EP4742761A1EP 4742761 A1EP4742761 A1EP 4742761A1EP-4742761-A1

Abstract

Provided are a communication apparatus, a network node, and communication methods for a communication apparatus and for a network node. The communication apparatus comprises: a transceiver, which, in operation, receives an indication indicative of at least one out of monitoring duration, a periodicity, a validity duration, or an ON/OFF status of an on-demand common signal; and circuitry, which, in operation, determines, based on the indication, the monitoring duration, the periodicity, the validity duration, and/or the ON/OFF status of the on-demand common signal.

Inventors

  • KURUVATTI, Nandish
  • LI, HONGCHAO
  • SUZUKI, HIDETOSHI
  • HORIUCHI, AYAKO

Assignees

  • Panasonic Intellectual Property Corporation of America

Dates

Publication Date
20260513
Application Date
20241107

Claims (15)

  1. A communication apparatus, comprising: a transceiver, which, in operation, receives an indication indicative of at least one out of monitoring duration, a periodicity, a validity duration, or an ON/OFF status of an on-demand common signal; and circuitry, which, in operation, determines, based on the indication, the monitoring duration, the periodicity, the validity duration, and/or the ON/OFF status of the on-demand common signal.
  2. The communication apparatus according to claim 1, wherein: the on-demand common signal is an on-demand system information block 1, SIB1, the transceiver, in operation, receives, as the indication indicative of the monitoring duration of the SIB1, a configuration of an uplink request for the SIB1, and the circuitry, in operation, determines, based on whether or not the configuration comprises a time window for the SIB1, whether the SIB1 is to be monitored within the time window or without a configured end.
  3. The communication apparatus according to claim 1, wherein: the on-demand common signal is an on-demand system information block 1, SIB1, the transceiver, in operation, receives, a random access response, RAR, to an uplink request for the SIB1, the RAR comprising, as the indication indicative of the monitoring duration of the SIB1, a bit indicator indicating whether the SIB1 is to be monitored within a configured time window or without a configured end.
  4. The communication apparatus according to claim 1, wherein: the on-demand common signal is an on-demand system information block 1, SIB1, the transceiver, in operation, receives a configuration of an uplink request for the SIB1, the configuration comprising the indication indicative of a time interval defining the periodicity of the SIB1, and the circuitry, in operation, determines, based on the periodicity, a monitoring timing for the SIB1, and determines the ON/OF status of the SIB1 by monitoring for the SIB1 at the determined monitoring timing.
  5. The communication apparatus according to claim 4, wherein the configuration of the uplink request for the SIB1 indicates a time window, and the time interval comprises a first time interval defining the periodicity within the time window and a second time interval defining the periodicity outside the time window.
  6. The communication apparatus according to claim 4 or 5, wherein, if the transceiver receives the SIB1 at the determined monitoring timing, the circuitry, in operation, stores a content of the SIB1 to be used for a random access procedure.
  7. The communication apparatus according to claim 4 or 5, wherein, if the transceiver receives the SIB1 at the determined monitoring timing, the circuitry, in operation, when launching a random access procedure, discards the content of the SIB1 received at the determined monitoring timing, obtains a current SIB1 at a later monitoring timing determined following the periodicity of the SIB1, and uses the content of the current SIB1 for the random access procedure.
  8. The communication apparatus according to claim 1, wherein: the on-demand common signal is an on-demand system information block 1, SIB1, and the transceiver, in operation, receives a master information block, MIB, comprising, as the indication indicative of the monitoring duration of the SIB1, • a bit indicator indicating whether or not the SIB1 is to be monitored within a configured time window or without a configured end, or • a numerical indicator k SSB having a first value indicating that the SIB1 is to be monitored within the configured time window or a second value indicating that the SIB1 is to be monitored without a configured end.
  9. The communication apparatus according to claim 1, wherein: the on-demand common signal is a paging message or a physical uplink random access channel, PRACH of a cell having an on-demand system information block 1, SIB1, and the transceiver, in operation, receives a master information block, MIB, comprising, as the indication indicative of the ON/OFF status of the paging message or of the PRACH when the on-demand SIB1 has stopped, • a bit indicator or • a numerical indicator k SSB having a first value indicating the ON status and a second value indicating the OFF status.
  10. The communication apparatus according to claim 1, wherein the on-demand common signal is a paging message or a physical uplink random access channel, PRACH of a cell having an on-demand system information block 1, SIB1, and the transceiver, in operation, receives • a configuration of an uplink request for a system information block 1, SIB1, or • a random access response, RAR, for the SIB1 including the indication indicative of the ON/OFF status of the common signal when the on-demand SIB1 has stopped.
  11. The communication apparatus according to claim 1, wherein: the on-demand common signal is a paging message or a physical uplink random access channel, PRACH of a cell having an on-demand system information block 1, SIB1, and the transceiver, in operation, receives, as the indication indicative of the ON/OFF status of the common signal, a timer indicating a period during which the common signal is to be considered in the ON status after the on-demand SIB1 has stopped.
  12. The communication apparatus according to any one of claims 9 to 11, wherein the circuitry, in operation, determines, based on the indication, the ON/OFF status of the on-demand common signal after the communication apparatus has camped in said cell, subsequently moved to another cell and moved back to said cell.
  13. A network node, comprising: circuitry which, in operation, configure at least one out of monitoring duration, a periodicity, a validity duration, or an ON/OFF status of an on-demand common signal; and a transceiver, which, in operation, transmits an indication indicative at least one out the monitoring duration, the periodicity, the validity duration, and/or the ON/OFF status of the on-demand common signal.
  14. A communication method to be performed by a communication apparatus, comprising the steps of: receiving an indication indicative of at least one out of monitoring duration, a periodicity, a validity duration, or an ON/OFF status of an on-demand common signal; and determining, based on the indication, the monitoring duration, the periodicity, the validity duration, and/or the ON/OFF status of the on-demand common signal.
  15. A communication method to be performed by a network node, comprising: configuring at least one out of monitoring duration, a periodicity, a validity duration, or an ON/OFF status of an on-demand common signal; and transmitting an indication indicative at least one out the monitoring duration, the periodicity, the validity duration, and/or the ON/OFF status of the on-demand common signal.

Description

BACKGROUND 1. Technical Field The present disclosure relates to transmission and reception of signals in a communication system. In particular, the present disclosure relates to methods and apparatuses for such transmission and reception. 2. Description of the Related Art The 3rd Generation Partnership Project (3GPP) works at technical specifications for the next generation cellular technology, which is also called fifth generation (5G) including "New Radio" (NR) radio access technology (RAT), which operates in frequency ranges up to 100 GHz. The NR is a follower of the technology represented by Long Term Evolution (LTE) and LTE Advanced (LTE-A). For systems like LTE, LTE-A, and NR, further modifications and options may facilitate efficient operation of the communication system as well as particular devices pertaining to the system. SUMMARY One non-limiting and exemplary embodiment facilitates providing indication of common channel status, including SIB1 and other common channels, for a cell with on-demand SIB1. In an embodiment, the techniques disclosed here feature communication apparatus, comprising a transceiver, which, in operation, receives an indication indicative of at least one out of monitoring duration, a periodicity, a validity duration, or an ON/OFF status of an on-demand common signal; and circuitry, which, in operation, determines, based on the indication, the monitoring duration, the periodicity, the validity duration, and/or the ON/OFF status of the on-demand common signal. It should be noted that general or specific embodiments may be implemented as a system, a method, an integrated circuit, a computer program, a storage medium, or any selective combination thereof. Additional benefits and advantages of the disclosed embodiments will become apparent from the specification and drawings. The benefits and/or advantages may be individually obtained by the various embodiments and features of the specification and drawings, which need not all be provided in order to obtain one or more of such benefits and/or advantages. BRIEF DESCRIPTION OF DRAWINGS Fig. 1 shows an exemplary architecture for a 3GPP NR system;Fig. 2 illustrates transmission related to on-demand system information block 1 (OD-SIB1);Fig. 3 illustrates an on-demand SIB-1 transmission window;Fig. 4 illustrates transmission of on-demand SIB1 without an explicit end;Fig. 5 illustrates a communication system comprising a communication apparatus and a network node;Fig. 6 illustrates common signal duration / status determination circuitry of a communication apparatus;Fig. 7 illustrates common signal duration / status configuration circuitry of a network node;Fig. 8 illustrates steps of a communication method for a communication apparatus;Fig. 9 illustrates steps of a communication method for a network node;Fig. 10 illustrates steps of a communication method of exemplary embodiments including determining whether on-demand SIB1 is to be requested;Fig. 11 illustrates steps of a communication method of exemplary embodiments including storing of the content of SIB1;Fig. 12 illustrates steps of a communication method of exemplary embodiments including acquisition of a new SIB1; andFigs. 13 and 14 illustrate steps of communication methods of exemplary embodiments including determining whether a limited monitoring duration for SIB1 is configured;Figs. 15 to 17 illustrate steps of communication methods of exemplary embodiments including determining the ON/OFF status of paging and/or PRACH.Fig. 18 shows exemplary functional split options in 5G O-RAN. DETAILED DESCRIPTION 5G NR system architecture and protocol stacks 5G NR system architecture assumes an NG-RAN (Next Generation - Radio Access Network) that comprises gNBs, providing the NG-radio access user plane (SDAP/PDCP/RLC/MAC/PHY) and control plane (RRC) protocol terminations towards the UE. The gNBs are interconnected with each other by means of the Xn interface. The gNBs are also connected by means of the Next Generation (NG) interface to the NGC (Next Generation Core), more specifically to the AMF (Access and Mobility Management Function) (e.g. a particular core entity performing the AMF) by means of the NG-C interface and to the UPF (User Plane Function) (e.g. a particular core entity performing the UPF) by means of the NG-U interface. The NG-RAN architecture is illustrated in Fig. 1 (see e.g. 3GPP TS 38.300 v15.6.0, section 4). Network energy saving (NES) In telecommunications networks, network energy saving (NES) has been identified as an important issue with regard to environmental sustainability, to reduce environmental impact (greenhouse gas emissions), and for operational cost savings. In 3GPP 5G Release 19, work items for NES have been formulated including the following four features (see e.g. RP-234065, "New WID: Enhancements of network energy savings for NR", section 4). Firstly, procedures and signaling method(s) are to be specified to support on-demand SSB (synchronization signal