ATIS 0700362-2015 Wideband General Packet Radio Service (WGPRS) Packet-Data Service C High Speed (HS) Indoor Radio Link Control Medium Access Control (RLC MAC).pdf

1、 ATIS-0700362 ATIS Standard on - WIDEBAND GENERAL PACKET RADIO SERVICE (WGPRS) PACKET-DATA SERVICE HIGH SPEED (HS) INDOOR RADIO LINK CONTROL/MEDIUM ACCESS CONTROL (RLC/MAC) As a leading technology and solutions development organization, the Alliance for Telecommunications Industry Solutions (ATIS) b

2、rings together the top global ICT companies to advance the industrys most pressing business priorities. ATIS nearly 200 member companies are currently working to address the All-IP transition, network functions virtualization, big data analytics, cloud services, device solutions, emergency services,

3、 M2M, cyber security, network evolution, quality of service, billing support, operations, and much more. These priorities follow a fast-track development lifecycle from design and innovation through standards, specifications, requirements, business use cases, software toolkits, open source solutions

4、, and interoperability testing. ATIS is accredited by the American National Standards Institute (ANSI). The organization is the North American Organizational Partner for the 3rd Generation Partnership Project (3GPP), a founding Partner of the oneM2M global initiative, a member of and major U.S. cont

5、ributor to the International Telecommunication Union (ITU), as well as a member of the Inter-American Telecommunication Commission (CITEL). For more information, visit www.atis.org. Notice of Disclaimer General aspects“.1 3 3GPP TS 24.008: “Mobile radio interface layer 3 specification; Core Network

6、protocols; Stage 3“.15 ATIS-0700361: “Wideband General Packet Radio Service (WGPRS) Packet-Data Service- High Speed (HS) Indoor Physical Layer “.26 3GPP TS 45.008: “Radio subsystem link control“.17 3GPP TS 44.018: “Mobile radio interface layer 3 specification; Radio Resource Control (RRC) protocol“.

7、18 ITU-T Recommendation T.4 “Standardization of Group 3 facsimile terminals for document transmission” 200339 3GPP TS 43.013: “Discontinuous Reception (DRX) in the GSM system”110 3GPP TS 45.002: “Multiplexing and multiple access on the radio path”111 3GPP TS 45.005: “Radio transmission and reception

8、”112 3GPP TS 44.060: “General Packet Radio Service (GPRS); Mobile Station (MS) - Base Station System (BSS) interface; Radio Link Control / Medium Access Control (RLC/MAC) protocol”113 3GPP TS 23.003: “Numbering, addressing and identification”114 3GPP TS 23.060: “General Packet Radio Service (GPRS);

9、Service description; Stage 2”11This document is available from the Third Generation Partnership Project (3GPP) at . 2This document is available from the Alliance for Telecommunications Industry Solutions (ATIS), 1200 G Street N.W., Suite 500, Washington, DC 20005 3This document is available from the

10、 International Telecommunications Union. ATIS-0700362 2 3 Definitions it listens to the PCCH. 3.1.5 Packet transfer mode: In packet transfer mode, the mobile station is prepared to transfer LLC PDUs on packet data physical channels (see subclause 5.4). The mobile station is allocated radio resource

11、on one or more packet data physical channels for the transfer of LLC PDUs. 3.1.6 PDCH: Packet Data Channel. In this standard, PDCH refers to one short or long timeslot (see ATIS-0700360) on the indoor carrier. It is required that an uplink indoor carrier and the corresponding downlink indoor carrier

12、 shall be split into timeslots symmetrically. This means that for each long timeslot on an uplink frame there shall be a long timeslot starting at the same place in the downlink frame. Also for each short slot on an uplink frame there shall be a short slot starting at the same place in the downlink

13、frame. When a mobile is assigned to an uplink PDCH, the corresponding downlink PDCH is the one that starts in the same place in the downlink frame and vice versa. 3.1.7 Radio block: Depending on the coding mode a radio block is one of the following: the sequence of four shortbursts, four long bursts

14、 or one long burst carrying one RLC/MAC protocol data unit. (The one exception is a radio block occasionally used on WGPRS Packet Associated Control Channel (WPACCH) consisting of a sequence of four access bursts, each carrying a repetition of one short RLC/MAC block.) 3.1.8 Random values: In a numb

15、er of places in this Standard, it is mentioned that some value must take a “random” value, in a given range, or more generally with some statistical distribution. For such random values refer to 3GPP TS 24.008. 3.1.9 RLC/MAC block: Radio Link Control and Medium Access Control block. A RLC/MAC block

16、is the protocol data unit exchanged between RLC/MAC entities (see subclause 10). 3.1.10 RLC/MAC control block: A RLC/MAC control block is the part of a RLC/MAC block carrying a control message between RLC/MAC entities (see subclause 10.3). 3.1.11 RLC data block: A RLC data block is the part of a RLC

17、/MAC block carrying user data or upper layers signalling data (see subclause 10.2). 3.1.12 TBF abort: The term “abort” as applied to Temporary Block Flow (TBF) is used when the TBF is abruptly stopped without using the Release of TBF procedures defined in subclause 9. 3.1.13 TBF release: The term “r

18、elease” as applied to TBF is used when the TBF is stopped using one of the Release of TBF procedures defined in subclause 9. 3.1.14 Temporary Block Flow (TBF): A TBF is a physical connection used by the two RLC/MAC peer entities to support the unidirectional transfer of LLC PDUs on packet data physi

19、cal channels (see subclause 5.2.1). 3.1.15 Uplink State Flag (USF): The USF is used on HS Indoor PDCHs to allow multiplexing of uplink Radio blocks from different mobile stations (see subclause 5.2.3 and subclause 10). ATIS-0700362 3 3.1.16 WGPRS: Wideband General Packet Radio Service. Enhanced GPRS

20、 for 1.6 MHz bearer channel, enables higher data rates through usage of Offset Quadrature Ampitude Modulation (O-QAM) modulation. WGPRS also enables Type II Hybrid Automatic Repeat Request (ARQ). 3.1.17 WGPRS TBF mode: Refers to a TBF utilizing the WGPRS enhancements, e.g., O-QAM modulation and Type

21、 II Hybrid ARQ. All bursts within a WGPRS TBF shall be of equal size, either long bursts or short bursts. Burst types shall not be mixed within a WGPRS TBF. 3.2 Acronyms AC Address Control ARFCN Absolute Radio Frequency Channel Number ARQ Automatic Repeat Request BCCH Broadcast Control Channel BEC B

22、ackward Error Correction BER Bit Error Ratio B-O-QAM Binary Quaternary Offset Quadrature Ampitude Modulation BOW Beginning of Window BSN Block Sequence Number BTS Base Transceiver Station CCCH Common Control Channel COS Coding Scheme Indicator CRBB Compressed Receive Block Bitmap CSN.1 Concrete Synt

23、ax Notation One CV Countdown Value DRX Discontinuous Reception EGPRS Enhanced General Packet Radio Service EOW End of Window ESN Ending Sequence Number FBI Final Block Indicator FN Frame Number FPB First Partial Bitmap FRB Full Received Bitmap FS Final Segment GMSK Gaussian Minimum Shift Keying GPRS

24、 General Packet Radio Service HS High Speed IE Information Element IMSI International Mobile Subscriber Identity IR Incremental Redundancy LLC Logical Link Control MAC Medium Access Control MCS Modulation and Coding Scheme MS Mobile Station NPB Next Partial Bitmap ATIS-0700362 4 NTS Number of Time S

25、lots O-QAM Offset Quadrature Ampitude Modulation PACCH Packet Associated Control Channel PBSN Partial Bitmap Sequence Number PCCCH Packet Common Control Channel PCCH Packet Control Channel PDCH Packet Data Channel PDU Packet Data Unit PS Puncturing Scheme PT Payload TypePTCH Packet Traffic Channel P

26、US Puncturing Scheme Indicator QAM Quadrature Ampitude Modulation Q-O-QAM Quaternary Offset Quadrature Ampitude Modulation QoS Quality of Service RB Reported Bitmap RBB Received Block Bitmap RBSN Reduced Block Sequence Number RLC Radio Link Control RR Radio Resources RRBP Relative Reserved Block Per

27、iod RTI Radio Transaction Identifier S/P Supplementary/Polling SI Stall Indicator SNS Sequence Number Space SSN Starting Sequence Number TBC Total Number of RLC Data Blocks to be transmitted TBF Temporary Block Flow TDMA Time Division Multiple Access TFI Temporary Flow Identity TI TLLI IndicatorTLLI

28、 Temporary Logical Link Identity URBB Uncompressed Received Block Bitmap USF Uplink State Flag V(A) Acknowledge State Variable V(B) Acknowledge State Array V(CS) Control Send State Variable V(H) Receive Header State Variable V(N) Receive State Array V(Q) Receive Window State Variable V(S) Send State

29、 Variable WGPRS Wideband General Packet Radio Service WMCS WGPRS Modulation and Coding Scheme ATIS-0700362 5 WPACCH WGPRS Packet Associated Control Channel WPTCH WGPRS Packet Traffic Channel WS Window Size4 Layered Overview of Radio Interface See ATIS-0700360 for an overview of the radio interface.

30、4.1 Layer Services The HS Indoor RLC/MAC provides services for the transfer of upper layer PDUs using a shared medium between multiple mobile stations and the network. The HS Indoor RLC/MAC function supports two modes of operation: Unacknowledged operation; and Acknowledged operation. The HS Indoor

31、RLC/MAC transfers data and controls channel assignments during packet transfer mode on WPTCH. In packet-idle mode, the mobile station monitors its paging channel on the PCCH. 4.2 Layer Functions The HS Indoor RLC/MAC includes functions for RLC and MAC. The RLC function defines the procedures for seg

32、mentation and reassembly of LLC PDUs into RLC/MAC blocks and, in RLC acknowledged mode of operation, for the Backward Error Correction (BEC) procedures enabling the selective retransmission of unsuccessfully delivered RLC/MAC blocks. In RLC acknowledged mode of operation, the RLC function preserves

33、the order of higher layer PDUs provided to it. The RLC function provides also link adaptation. In RLC acknowledged mode of operation, the RLC function may provide IR. The MAC function defines the procedures that enable multiple mobile stations to share a common transmission medium, which may consist

34、 of several physical channels. The function may allow a mobile station to use several physical channels in parallel, i.e., use several timeslots within the TDMA frame. Additionally, the HS Indoor RLC/MAC provides radio resource management functions during packet transfer mode on the WPTCH. 4.3 Servi

35、ces Required from Other Layers The HS Indoor RLC/MAC uses the services provided by the physical link layer as defined in ATIS-0700361. 5 Introduction to the Medium Access Control (MAC) Procedures 5.1 General The MAC procedures include the functions related to the management of the shared transmissio

36、n resources, e.g., the packet data physical channels and the radio link connections on packet data physical channels. The MAC procedures support the provision of TBFs that allow the point-to-point transfer of signalling and user data within a cell between the network and a mobile station. 5.2 Multip

37、lexing Principles ATIS-0700362 6 5.2.1 Temporary Block Flow A TBF is a physical connection used by the two Radio Resources (RR) entities to support the unidirectional transfer of LLC PDUs on packet data physical channels. The TBF is allocated RR on one or more PDCHs and comprises a number of RLC/MAC

38、 blocks carrying one or more LLC PDUs. A TBF is temporary and is maintained only for the duration of the data transfer (i.e., until there are no more RLC/MAC blocks to be transmitted and, in RLC acknowledged mode, all of the transmitted RLC/MAC blocks have been successfully acknowledged by the recei

39、ving entity). On a WPTCH, the TBF operates in WGPRS TBF mode. The network sets the TBF mode in the Channel Assignment Type D, PACKET UPLINK ASSIGNMENT, Channel Assignment Type E, or WGPRS PACKET DOWNLINK ASSIGNMENT. 5.2.2 Temporary Flow Identity Each TBF is assigned a Temporary Flow Identity (TFI) b

40、y the network. The mobile station shall assume that the TFI value is unique among concurrent TBFs in each direction (uplink or downlink). The same TFI value may be used concurrently for TBFs in opposite directions. An RLC/MAC block associated with a certain TBF shall comprise a TFI. The TBF is ident

41、ified by the TFI together with, in case of a RLC data block, the direction (uplink or downlink) in which the RLC data block is sent; and in case of a RLC/MAC control message, the direction in which the RLC/MAC control message is sent and the message type. Each TBF may also be identified by a Global_

42、TFI. The Global_TFI unambiguously identifies the mobile station in an uplink or downlink RLC/MAC control message. If present, the Global_TFI addresses the MS using either the uplink TFI or downlink TFI of the MS. Which TFI is used is at the discretion of the sender except where explicitly defined by

43、 procedure. 5.2.3 Uplink State Flag An USF is included in the header of each RLC/MAC block on a downlink PDCH, as specified in subclause 10. It may be used by the network to control the multiplexing of different mobile stations on uplink PDCH. 5.2.4 Medium Access Modes Three medium access modes are

44、supported: Dynamic Allocation characterized by the mobile station detecting an assigned USF value for each assigned PDCH and block, or group of four blocks, that the MS is allowed to transmit on that PDCH. (see subclause 8.1.1.1); Extended Dynamic Allocation characterized by the mobile station detec

45、ting an assigned USF value for any assigned PDCH allowing the mobile station to transmit on that PDCH and all higher numbered assigned PDCHs in the same block or group of four blocks (see subclause 8.1.1.2); and Fixed Allocation characterized by fixed allocation of radio blocks and PDCHs in the assi

46、gnment message without an assigned USF (see subclause 8.1.1.3). Either the Dynamic Allocation medium access mode or Fixed Allocation medium access mode shall be supported by all networks that support WGPRS. The support of Extended Dynamic Allocation is optional for the network. The Dynamic Allocatio

47、n and Fixed Allocation modes shall be supported in all mobile stations. The support of Extended Dynamic Allocation is optional and shall be indicated in the MS Radio Access Capability. ATIS-0700362 7 5.3 Packet Idle Mode In packet idle mode, upper layers may require the establishment of an RR connec

48、tion. When the mobile station enters dedicated mode (see 3GPP TS 44.018), it may leave the packet idle mode, if the mobile station limitations make it unable to handle the RR connection and the procedures in packet idle mode simultaneously. In packet idle mode, no TBF exists (see 3GPP TS 44.060). Up

49、per layers may require the transfer of a LLC PDU, which implicitly triggers the establishment of a TBF. In packet idle mode, the mobile station monitors the relevant paging subchannels on a PCCH. 5.4 Packet Transfer Mode In packet transfer mode, the mobile station is allocated RR providing a TBF for a physical point-to-point connection on one or more packet data physical channels for the unidirectional transfer of LLC PDUs between the network and the mobile station. Continuous transfer of one or more LLC PDUs is possible. Concurrent TBFs may be establi