Search

EP-4258790-B1 - SCHEDULING REQUEST RESOURCE CONFIGURATION

EP4258790B1EP 4258790 B1EP4258790 B1EP 4258790B1EP-4258790-B1

Inventors

  • FALAHATI, SOROUR
  • BALDEMAIR, ROBERT

Dates

Publication Date
20260506
Application Date
20180112

Claims (11)

  1. Method of operating a user equipment (10) in a New Radio, NR, radio access network, the user equipment (10) being configured with a reference time resource available, in one or more slots, for transmission of a scheduling request by the user equipment (10), the reference time resource comprising a reference symbol R, the reference symbol R being configured for a starting slot , wherein each of the one or more slots has a slot duration of 14 symbols; the user equipment (10) further being configured with a requesting periodicity P indicating a periodicity with a time period shorter than the slot duration, the requesting periodicity P corresponding to one of 2 and 7 symbols; the method comprising transmitting a scheduling request message on a Physical Uplink Control Channel, PUCCH, at a request transmission symbol T which is based on the reference symbol R and the periodicity P, wherein the scheduling request message is a PUCCH format 0 message transmitted over 1 symbol and the starting slot is predetermined based on a standard definition.
  2. User equipment (10) for a New Radio, NR, radio access network, the user equipment (10) being configured with a reference time resource available, in one or more slots, for transmission of a scheduling request by the user equipment (10), the reference time resource comprising a reference symbol R, the reference symbol R being configured for a starting slot, wherein each of the one or more slots has a slot duration of 14 symbols; the user equipment (10) further being configured with a requesting periodicity P indicating a periodicity with a time period shorter than the slot duration, the requesting periodicity P corresponding to one of 2 and 7 symbols; wherein the user equipment (10) is adapted for transmitting a scheduling request message on a Physical Uplink Control Channel, PUCCH, at a request transmission symbol T which is based on the reference symbol R and the periodicity P, wherein the scheduling request message is a PUCCH format 0 message transmitted over 1 symbol and the starting slot is predetermined based on a standard definition.
  3. Method of operating a radio node (100) in a New Radio, NR, radio access network, the method comprising configuring a user equipment (10) with a reference time resource available, in one or more slots, for transmission of a scheduling request by the user equipment (10), the reference time resource comprising a reference symbol R, the reference symbol R being configured for a starting slot, wherein each of the one or more slots has a slot duration of 14 symbols; the user equipment (10) further being configured with a requesting periodicity P indicating a periodicity with a time period shorter than the slot duration, the requesting periodicity P corresponding to one of 2 and 7 symbols; the method comprising receiving a scheduling request message on a Physical Uplink Control Channel, PUCCH, at a request reception symbol RC which is based on the reference symbol R and the periodicity P, wherein the scheduling request message is a PUCCH format 0 message transmitted over 1 symbol and the starting slot is predetermined based on a standard definition.
  4. Radio node (100) for a New Radio, NR, radio access network, the radio node (100) being adapted for configuring a user equipment (10) with a reference time resource available, in one or more slots, for transmission of a scheduling request by the user equipment (10), the reference time resource comprising a reference symbol R, the reference symbol R being configured for a starting slot, wherein each of the one or more slots has a slot duration of 14 symbols; the user equipment (10) further being configured with a requesting periodicity P indicating a periodicity with a time period shorter than the slot duration, the requesting periodicity P corresponding to one of 2 and 7 symbols; the radio node (100) further being adapted for receiving a scheduling request message on a Physical Uplink Control Channel, PUCCH, at a request reception symbol RC which is based on the reference symbol R and the periodicity P, wherein the scheduling request message is a PUCCH format 0 message transmitted over 1 symbol and the starting slot is predetermined based on a standard definition.
  5. Method or device according to one of the preceding claims, wherein the periodicity P and/or the reference symbol R is semi-statically configured, and/or wherein the periodicity P and/or the reference symbol R is configured utilising Radio Resource Control signaling.
  6. Method or device according to one of the preceding claims, wherein the periodicity P and the reference symbol R are configured with the same message or with different messages.
  7. Method or device according to one of the preceding claims, wherein the request transmission symbol T is earlier in a slot than the reference symbol R of the same slot.
  8. Method or device according to one of the preceding claims, wherein the scheduling request message comprises 1 or 2 bits.
  9. Method or device according to one of the preceding claims, wherein 1 bit of the scheduling request message indicates whether the user equipment (10) requests resources for transmission by the user equipment (10).
  10. Program product comprising instructions adapted for causing processing circuitry to control and/or perform a method according to one of claims 1, 3, or 5 to 9 when executed on the processing circuitry.
  11. Carrier medium arrangement carrying and/or storing a program product according to claim 10.

Description

Technical Field This disclosure pertains to wireless or telecommunication communication technology, in particular to New Radio, NR, radio access technology, e.g. for mobile communication. Background Currently, radio telecommunication technology of 5th Generation is being developed, with the goal to serve a large variety of use cases. Thus, the development aims at providing systems with a high level of flexibility, which can lead to undesirable levels of (control) signaling overhead. One type of control signaling is related to scheduling request, e.g. if a user equipment (UE) requests resources for transmission. The request itself has to be sent on resources, which have to be configured or otherwise indicated or reserved. In particular for low-latency applications, or other application requiring a high density of resources available for such requests, the signaling overhead can be significant. The followings are prior art examples: 3GPP document R1-1717396, Source: Intel Corporation, Title: "UL data transmission procedures in NR"; 3GPP document R1-1718647, Source: Ericsson, Title: "On UL Data Transmission Procedure"; 3GPP document R1-1720097, Source: Intel Corporation, Title: "Remaining details of UL data transmission procedures in NR"; WO2016048595 A1; and US2016105905 A1. Summary The scope of the present invention is defined in the appended independent claims. Specific embodiments of the present invention are defined in the dependent claims. It is an object of this disclosure to provide approaches allowing efficient control signaling, in particular for handling scheduling requests, e.g. transmission from a user equipment (UE) to a network (e.g., a network node) indicating that the UE desires resources for uplink transmission. The approaches are particularly advantageously implemented in a 5th Generation (5G) telecommunication network or 5G radio access technology or network (RAT/RAN), in particular according to 3GPP (3rd Generation Partnership Project, a standardisation organization). A suitable RAN may in particular be a RAN according to NR, for example release 15 or later, or LTE Evolution. There is generally disclosed a method of operating a user equipment (or, more generally, a first radio node) in a radio access network. The user equipment (or first radio node) is configured with a reference time resource. The reference time resource is available in one or more slots for transmission of a scheduling request by the user equipment. Moreover, the reference time resource comprises a reference symbol R, wherein each of the one or more slots has a slot duration that is based on a number N of symbols in the slot. The user equipment or first radio node further is configured with a requesting periodicity P indicating a periodicity with a time period shorter than the slot duration. The method comprises transmitting a scheduling request message at a request transmission symbol T which is based on the reference symbol R and the periodicity P. There is also considered a user equipment for a radio access network. The user equipment is configured with a reference time resource. The reference time resource is available, in one or more slots, for transmission of a scheduling request by the user equipment. The reference time resource comprises a reference symbol R, wherein each of the one or more slots has a slot duration that is based on a number N of symbols in the slot. The user equipment (or first radio node) further is configured with a requesting periodicity P, which indicates a periodicity with a time period shorter than the slot duration. The user equipment (or first radio node) is adapted and/or configured for transmitting a scheduling request message at a request transmission symbol T which is based on the reference symbol R and the periodicity P. The user equipment or first radio node may comprise, and/or be adapted for utilising, processing circuitry and/or radio circuitry, in particular a transmitter and/or receiver and/or transceiver, for transmitting and/or being configured and/or determining the request transmission symbol T. Alternatively, or additionally, the user equipment or first radio node may comprise (e.g., have stored in memory), a corresponding transmitting module and/or configuring module and/or determining module. A method of operating a radio node (or a network node arrangement) in a radio access network is described. The method comprises configuring a user equipment or first radio node with a reference time resource. The reference time resource is available, in one or more slots, for transmission of a scheduling request by the user equipment or first radio node. The reference time resource further comprises a reference symbol R, wherein each of the one or more slots has a slot duration that is based on a number N of symbols in the slot. The user equipment or first radio node also is configured (e.g., by the network, in particular the radio node or node arrangement) with a requesting period