WO2019064088A1 - Procédé et appareil pour transfert d'unités de données du protocole mac compact - Google Patents

Procédé et appareil pour transfert d'unités de données du protocole mac compact Download PDF

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Publication number
WO2019064088A1
WO2019064088A1 PCT/IB2018/056610 IB2018056610W WO2019064088A1 WO 2019064088 A1 WO2019064088 A1 WO 2019064088A1 IB 2018056610 W IB2018056610 W IB 2018056610W WO 2019064088 A1 WO2019064088 A1 WO 2019064088A1
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WO
WIPO (PCT)
Prior art keywords
subheader
random access
access preamble
type field
mac pdu
Prior art date
Application number
PCT/IB2018/056610
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English (en)
Inventor
Samuli Turtinen
Original Assignee
Nokia Technologies Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Technologies Oy filed Critical Nokia Technologies Oy
Publication of WO2019064088A1 publication Critical patent/WO2019064088A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information

Definitions

  • the present application relates generally to compact transfer of Medium Access (MAC) layer Physical Data Units (PDU).
  • MAC Medium Access
  • PDU Physical Data Units
  • a MAC layer which transfers MAC PDUs consisting of a MAC header and zero or more MAC Random Access Responses (MAC RAR) and optionally padding.
  • a MAC PDU header consists of one or more MAC PDU subheaders, each of which corresponding to a MAC RAR except for any Backoff Indicator (BI) subheader. If includeded, the BI subheader is only includeded once and is the first subheader included within the MAC PDU header.
  • BI Backoff Indicator
  • a MAC PDU subheader consists of the three header fields E/T/RAPID except for the
  • BI subheader which consists of the five header field E/T/R/R/BI.
  • the Extension field is a flag indicating if more fields are present in the MAC header or not.
  • the E field is set to " 1" to indicate at least another set of E/T/RAPID fields follows.
  • the E field is set to "0" to indicate that a MAC RAR or padding starts at the next byte;
  • the Type field is a flag indicating whether the MAC subheader contains a Random Access Preamble ID (RAPID) or a BI.
  • BI The Backoff Indicator field identifies the overload condition in the cell.
  • RAPID The Random Access Preamble IDentifier field identifies a transmitted Random
  • a method, apparatus and software program product for encoding MAC PDU to comprise a variable plurality of subheaders, each of the plurality of subheaders having a single bit type field indicating the type of a respective subheader, the single bit type field configured to indicate when the subheader is a sequentially first subheader in the MAC PDU, whether the subheader contains a Random Access Preamble ID or a Backoff Indicator; and the single bit type field further configured to indicate when the subheader not the first sequentially first subheader in the MAC PDU, whether the subheader contains a Random Access Preamble ID or a padding subheader; and for transmitting the encoded MAC PDU.
  • an encoded MAC PDU comprising a variable plurality of subheaders, each of the plurality of subheaders having a single bit type field indicating the type of a respective subheader, the single bit type field configured to indicate when the subheader is a sequentially first subheader in the MAC PDU, whether the subheader contains a Random Access Preamble ID or a Backoff Indicator; and the single bit type field further configured to indicate when the subheader not the first sequentially first subheader in the MAC PDU, whether the subheader contains a Random Access Preamble ID or a padding subheader; and decoding each of the plurality of subheaders in accordance with whether the respective single-bit Type field indicates a Backoff Indicator subheader, a Random Access Preamble ID subheader or a Padding subheader.
  • FIGURE 1 illustrates a MAC PDU in accordance with the 3 GPP LTE standard
  • FIGURE 2 illustrates a MAC PDU in accordance with embodiments of the inventions
  • FIGURE 3 illustrates a flow diagram for encoding a MAC subheader in accordance with embodiments of the invention.
  • FIGURE 4 illustrates a flow diagram for decoding a MAC subheader in accordance with embodiments of the invention.
  • FIGURE 5 illustrates an apparatus in accordance with embodiments of the invention
  • new subheaders are defined for a more compact signaling of contents of a MAC PDU.
  • FIG. 2 depicts an embodiment of the invention wherein a MAC PDU is split into multiple subPDUs, each of which comprising one subheader and zero or one MAC RARs.
  • the first subPDU may consist of a BI subheader (210), which need not comprise an Extension field to indicate whether any subsequent subheaders or subPDUs will follow.
  • the Type field (T) is a flag indicating whether the MAC subheader contains a Random Access Preamble ID (RAPID) or a BI.
  • RAPID Random Access Preamble ID
  • B I the definition of the Type field as indicating RAPID or B I is restricted to the first subPDU and hence to the first subheader in the MAC PDU.
  • the second and any further subPDUs comprise a RAPID subheader (220), which need not comprise an Extension field to indicate whether any subsequent subheaders or subPDUs will follow, and may comprise a MAC RAR.
  • the presence of the MAC RAR is indicated by the RAPID value in the RAPID subheader belonging to a configured subset of possible RAPID values.
  • the Type field (T) is a flag indicating whether the MAC subheader contains a RAPID subheader (220) or a Padding subheader (240).
  • the binary Type field (T) supports three indications depending on its value and whether or not it is comprised in the first subheader. For example, a value of 1 may indicate that the subheader contains a RAPID whereas a value of 0 indicates that the subheader contains a BI if the subheader is the first subheader, whereas a value of 0 indicates that the subheader contains a Padding subheader if the subheader is not the first subheader.
  • a compact one -bit Type field indicating three possible subheaders may be achieved.
  • the first subheader may be configured as having a BI field indicating zero milliseconds backoff followed by one or more Padding subheaders, such that the Type field in at least the first two subheaders is set to zero (indicative respectively of BI subheader and Padding subheader) and the BI field in the first subheader is set to all zeros as well.
  • the sole remaining restriction to achieve a single- bit Type field providing three indications would be that the MAC PDU contains at least two subheaders, that is, at least a plurality of subheaders.
  • the MAC RAR may be an octet aligned field comprising multiple octets (comprising for example a timing advance command, an uplink grant and a temporary C-RNTI), the contents of which is not material to the present invention.
  • the BI subheader (210) is depicted as having a 4 bit BI field, the BI field may further occupy one or more of the depicted reserved bits.
  • the RAPID subheader (220) is depecited as having a 6 bit RAPID field, the RAPID field may further occupy the reserved bit, such that 128 RAPID values are available.
  • the reserved bit may also indicate that RAPID subheader is extended, such that RAPID field could occupy more than 6 bits, for example 7, 8 or 14 bits.
  • bits are indicated as reserved, such bits may be reserved for signaling of features not material to the present invention without departing from the scope of the invention.
  • the padding subheader could be amended, such that if the single-bit Type field indicates the padding subheader but the reserved bits are not all set to zero as is typically expected for the padding subheader then the subheader could indicate at least a fourth subheader.
  • the Type field may indicate the BI subheader, the RAPID subheader, or a set of subheaders comprising at least the padding subheader, wherein the ambiguity between the padding subheader and further subheaders in the set of subheaders is resolved by bits presently set as Reserved.
  • Such further subheaders could then be used as any subheader in the MAC PDU with exception of the sequentially first subheader to avoid confusion with the BI subheader.
  • Figure 3 depicts a flow diagram for encoding a to-be-transmitted MAC subheader in accordance with embodiments of the invention.
  • it is checked whether the subheader to be encoded is a first subheader in the MAC PDU. If it is the first subheader, the process proceeds to 320 where it is checked whether the first subheader should be formatted as a BI subheader. If this is the case, the Type field is set to 0 and the first subheader is encoded as a BI subheader at 340.
  • the Type field is set to 1 and the first subheader is encoded as a RAPID subheader at 350, where depending on the RAPID value in the RAPID subheader, a MAC RAR may be encoded following the RAPID subheader. If at 310, the subheader is determined not to be the first subheader, it is checked at 330 whether the subheader should be encoded as a Padding subheader. If this the case, then the Type field is set to 0 and the non-first subheader is encoded as a padding subheader at 360.
  • the Type field is set to 1 and the first subheader is encoded as a RAPID subheader at 350, where depending on the RAPID value in the RAPID subheader, a MAC RAR may be encoded following the RAPID subheader.
  • bit values 1 and 0 may be performed in a different order and/or to perform the process by checking the opposite condition and or switching the use of bit values 1 and 0 without departing from the scope of the invention.
  • the encoding process may be performed as depicted as starting at 305.
  • Figure 4 depicts a flow diagram for decoding a received MAC subheader in accordance with embodiments of the invention.
  • the received subheader is a first subheader in a MAC PDU. If it is the first subheader, then at 420 it checked whether its Type field is set to 0. If this is the case, then the process proceeds to 440, where the subheader is decoded as a BI subheader. If this is not the case, then process proceeds to 450, where the subheader is decoded as a RAPID subheader.
  • the RAPID value in the RAPID subheader it is determined whether octets following the RAPID subheader should be decoded as a MAC RAR. If at 410, it is not the first subheader, it is checked at 430 whether its Type field is set to 0. If this is the case, then the process proceeds to 460, where the subheader is considered to be a Padding subheader. If this is not the case, then process proceeds to 450, where the subheader is decoded as a RAPID subheader. Based on the RAPID value in the RAPID subheader, it is determined whether octets following the RAPID subheader should be decoded as a MAC RAR.
  • FIG. 5 depicts a block diagram illustrating an example wireless apparatus (500) in accordance with embodiments of the invention.
  • the wireless apparatus may include at least one processor (520), at least one memory (510) coupled to the at least one processor (520) and at least one suitable transceiver (530) having a transmitter and a receiver coupled to the at least one processor (520), coupled to at least one antenna unit (650) through at least one amplifier (540).
  • the at least one memory (510) may store computer programs, which may, when executed by the at least one processor (520), for example in combination with any of the at least one transceiver (530), at least one amplifier (640) and at least one antenna unit (550), perform embodiments of the invention.
  • an infrastructure node or user equipment may be embodied in apparatus 500.
  • Further embodiments comprise an apparatus comprising means for carrying out the embodiments described above and any combination thereof.
  • Embodiments of the invention may be implemented in software (executed by one or more processors), hardware (e.g., an application specific integrated circuit or field programmable gate array), or a combination of software and hardware.
  • the software e.g., application logic, an instruction set
  • the software is maintained on any one of various conventional non- transitory computer-readable media.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Selon un mode de réalisation donné à titre d'exemple de la présente invention, un appareil conçu pour transmettre une unité de données du protocole (PDU) MAC, la PDU MAC étant conçue pour comprendre une pluralité variable de sous-en-têtes, chaque sous-en-tête de la pluralité de sous-en-têtes possédant un champ type à bit unique indiquant le type d'un sous-en-tête respectif, le champ type à bit unique étant conçu pour indiquer à quel moment le sous-en-tête est un premier sous-en-tête séquentiel dans la PDU MAC, si le sous-en-tête contient un ID de préambule d'accès aléatoire ou un indicateur d'attente; et le champ type à bit unique est en outre conçu pour indiquer à quel moment le sous-en-tête n'est pas le premier sous-en-tête séquentiel dans la PDU MAC, si le sous-en-tête contient un identifiant de préambule d'accès aléatoire ou un sous-en-tête de remplissage.
PCT/IB2018/056610 2017-09-28 2018-08-30 Procédé et appareil pour transfert d'unités de données du protocole mac compact WO2019064088A1 (fr)

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US201762564817P 2017-09-28 2017-09-28
US62/564,817 2017-09-28

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Cited By (1)

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US20220295547A1 (en) * 2019-07-30 2022-09-15 Zte Corporation Architecture for random access messaging

Citations (1)

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WO2016086144A1 (fr) * 2014-11-26 2016-06-02 Interdigital Patent Holdings, Inc. Accès initial dans des systèmes sans fil haute fréquence

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WO2016086144A1 (fr) * 2014-11-26 2016-06-02 Interdigital Patent Holdings, Inc. Accès initial dans des systèmes sans fil haute fréquence

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LG ELECTRONICS INC: "Padding issue for MAC Random Access Response", 3GPP DRAFT; R2-085238 MAC RAR PADDING, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, no. Prague, Czech Republic; 20080923, 23 September 2008 (2008-09-23), XP050320137 *
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220295547A1 (en) * 2019-07-30 2022-09-15 Zte Corporation Architecture for random access messaging
US11576217B2 (en) * 2019-07-30 2023-02-07 Zte Corporation Architecture for random access messaging
US11871458B2 (en) 2019-07-30 2024-01-09 Zte Corporation Architecture for random access messaging

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