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US-20260129502-A1 - DELAY STATUS REPORTS IN WIRELESS COMMUNICATIONS

US20260129502A1US 20260129502 A1US20260129502 A1US 20260129502A1US-20260129502-A1

Abstract

A transmitter node of a telecommunications system comprises processor circuitry and interface circuitry. The processor circuitry is configured to generate a delay status report (DSR) medium access control (MAC) control element (CE) which comprises an indication of non-delay-critical data in a buffer which precedes in transmission order delay-critical data reported by the DSR MAC CE. The interface circuitry is configured to transmit the DSR MAC CE over a radio interface to a receiver node of the telecommunications system.

Inventors

  • Sangkyu BAEK
  • Zhanping Yin

Assignees

  • SHARP KABUSHIKI KAISHA

Dates

Publication Date
20260507
Application Date
20241107

Claims (15)

  1. 1 . A transmitter node of a telecommunications system, the transmitter node comprising: memory comprising a buffer; processor circuitry configured to generate a delay status report (DSR) medium access control (MAC) control element (CE) comprising a buffer size field including non-delay-critical data in the buffer which precedes in transmission order delay-critical data reported by the DSR MAC CE; and, interface circuitry configured to transmit the DSR MAC CE over a radio interface to a receiver node of the telecommunications system.
  2. 2 . The node of claim 1 , wherein the interface circuitry is further configured to receive a configuration message over the radio interface from the receiver node of the telecommunications system; and wherein the processor circuitry is configured to determine, based on the configuration message, whether to generate the buffer size field to include non-delay-critical data.
  3. 3 . The node of claim 1 , wherein: packets for a logical channel group are stored in the buffer, and wherein each of the packets for the logical channel group are classified in one of plural zones; the processor circuitry is configured to generate the delay status report (DSR) medium access control (MAC) control element (CE) to comprise a buffer size field for one or more zones for at least one of the one or more logical channel groups reported by the DSR MAC CE, and wherein for at least one of the zones, the buffer size field reflects an amount of delay-critical data for the zone and an amount of non-delay-critical data.
  4. 4 . The node of claim 3 , wherein the amount of non-delay-critical data comprises non-delay-critical data stored in the buffer timewise ahead of the last delay-critical data for the zone but not included in the buffer size of another zone.
  5. 5 . The node of claim 3 , wherein the amount of non-delay-critical data comprises non-delay-critical data stored in the buffer timewise ahead of the first delay-critical data for the zone but not included in the buffer size of another zone.
  6. 6 . The node of claim 3 , wherein the amount of non-delay-critical data comprises non-delay-critical data for the zone.
  7. 7 . The node of claim 3 , wherein non-delay-critical data is not included in the buffer size field for a zone if it has already included in a buffer size field of another zone in the same DSR MAC CE.
  8. 8 . A method in a transmitter node of a telecommunications system, the method comprising: generating a delay status report (DSR) medium access control (MAC) control element (CE) to comprise a buffer size field which includes non-delay-critical data in the buffer which precedes in transmission order delay-critical data reported by the DSR MAC CE; and, transmitting the DSR MAC CE over a radio interface to a receiver node of the telecommunications system.
  9. 9 . A receiver node of a telecommunications system, the receiver node comprising: interface circuitry configured to receive a delay status report (DSR) medium access control (MAC) control element (CE) over a radio interface from a transmitter node of the telecommunications system; and processor circuitry configured to determine from the DSR MAC CE a buffer size field which includes non-delay-critical data precedes, in reception order, delay-critical data reported by the DSR MAC CE.
  10. 10 . The node of claim 9 , wherein the processor circuitry is configured to generate a configuration message which configures the transmitter circuitry whereby the transmitter circuitry generates the DSR MAC CE so that the buffer size includes the non-delay-critical data in the buffer based on the configuration message.
  11. 11 . The node of claim 9 , wherein: the DSR MAC CE comprises a buffer size field for one or more zones for at least one of the one or more logical channel groups reported by the DSR MAC CE; and the processor circuitry is configured to determine from the DSR MAC CE that the buffer size field of the DSR MAC CE for a zone reflects an amount of delay-critical data for the zone reported by the DSR MAC CE and an amount of non-delay-critical data.
  12. 12 . The node of claim 10 , wherein the amount of non-delay-critical data comprises non-delay-critical data stored in a buffer timewise ahead of the last delay-critical data for the zone but not included in the buffer size of another zone.
  13. 13 . The node of claim 10 , wherein the amount of non-delay-critical data comprises non-delay-critical data stored in a buffer timewise ahead of the first delay-critical data for the zone but not included in the buffer size of another zone.
  14. 14 . The node of claim 10 , wherein the amount of non-delay-critical data comprises non-delay-critical data for the zone.
  15. 15 . The node of claim 10 , wherein non-delay-critical data is not included in the buffer size field for a zone if it has already included in a buffer size field of another zone in the same DSR MAC CE.

Description

TECHNICAL FIELD The technology relates to wireless communications, and particularly to the reporting between network nodes, e.g., between a transmitter node and a receiver node, the presence of delay-critical data awaiting transmission. BACKGROUND A radio access network typically resides between wireless devices, such as user equipment (UEs), mobile phones, mobile stations, or any other device having wireless termination, and a core network. Example of radio access network types includes the GRAN, GSM radio access network; the GERAN, which includes EDGE packet radio services; UTRAN, the UMTS radio access network; E-UTRAN, which includes Long-Term Evolution; and NG-UTRAN, the New Radio (NR). A radio access network may comprise one or more access nodes, such as base station nodes, which facilitate wireless communication or otherwise provides an interface between a wireless terminal and a telecommunications system. A non-limiting example of a base station can include, depending on radio access technology type, a Node B (“NB”), an enhanced Node B (“eNB”), a home eNB (“HeNB”), a gNB (for a New Radio [“NR”] technology system), or some other similar terminology. The 3rd Generation Partnership Project (“3GPP”) is a group that, e.g., develops collaboration agreements such as 3GPP standards that aim to define globally applicable technical specifications and technical reports for wireless communication systems. Various 3GPP documents may describe certain aspects of radio access networks. Overall architecture for a fifth-generation system, e.g., the 5G System, also called “NR” or “New Radio”, as well as “NG” or “Next Generation”, is shown in FIG. 1, and is also described in 3GPP TS 38.300. The 5G NR network is comprised of NG RAN (Next Generation Radio Access Network) and 5GC (5G Core Network). As shown, NGRAN is comprised of gNBs (e.g., 5G Base stations) and ng-eNBs (i.e. LTE base stations). An Xn interface exists between gNB-gNB, between gNB)-(ng-eNB) and between (ng-eNB)-(ng-eNB). The Xn is the network interface between NG-RAN nodes. Xn-U stands for Xn User Plane interface and Xn-C stands for Xn Control Plane interface. An interface known as the NG interface exists between 5GC and the base stations (i.e. gNB & ng-eNB). A gNB node provides NR user plane and control plane protocol terminations towards the UE and is connected via the NG interface to the 5GC. The 5G NR (New Radio) gNB is connected to AMF (Access and Mobility Management Function) and UPF (User Plane Function) in 5GC (5G Core Network). The Open Systems Interconnection, OSI, model is a reference framework that explains the process of transmitting data between computers. It is divided into seven layers that work together to carry out specialized network functions, allowing for a more systematic approach to networking. Information transferred from one device to another device travels through 7 layers of OSI model. First data travels down through 7 layers from the sender's end and then climbs back 7 layers on the receiver's end. Data flows through the OSI model in a step-by-step process: Layer 7: Application Layer: Applications create the data.Layer 6: Presentation Layer: Data is formatted and encrypted.Layer 5: Session Layer: Connections are established and managed.Layer 4: Transport Layer: Data is broken into segments for reliable delivery.Layer 3: Network Layer: Segments are packaged into packets and routed.Layer 2: Data Link Layer: Packets are framed and sent to the next device.Layer 1: Physical Layer: Frames are converted into bits and transmitted physically. A protocol stack may comprise different individual protocols. Protocols may be simply described as a set of rules that allow communication between peer entities or they can also be described as set of rules that facilitate horizontal communication. These protocols may be arranged in the layers such as those described above. In a transmitter side, a layer N receives data from layer N+1 and this data is called the SDU or Service Data Unit. This layer will modify the data and convert it into a PDU or a Protocol Data Unit. The peer entity in the receiver is only able to understand this PDU. In the receiver side, the peer entity receives the PDU from layer N−1, e.g., actually layer N−1 SDU, and converts it back into SDU(s) and passes it to layer N+1. Radio Link Control (RLC) is a layer 2 Radio Link Protocol used in UMTS, LTE and 5G on the Air interface. This protocol is specified by 3GPP in TS 25.322 for UMTS, TS 36.322 for LTE and TS 38.322 for 5G New Radio (NR). RLC is located on top of the 3GPP MAC-layer and below the PDCP-layer. The main tasks of the RLC protocol are: Transfer of upper layer Protocol Data Units (PDUs) in one of three modes: Acknowledged Mode (AM), Unacknowledged Mode (UM) and Transparent Mode (TM)Error correction through ARQ (only for AM data transfer)Segmentation and reassembly of RLC SDUs (UM and AM)Re-segmentation of RLC data PDUs (AM)Reordering of RLC data PDUs (UM and AM)Duplica