WO2019192329A1 - Améliorations apportées ou se rapportant à une liaison terrestre d'accès intégrée - Google Patents

Améliorations apportées ou se rapportant à une liaison terrestre d'accès intégrée Download PDF

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Publication number
WO2019192329A1
WO2019192329A1 PCT/CN2019/079064 CN2019079064W WO2019192329A1 WO 2019192329 A1 WO2019192329 A1 WO 2019192329A1 CN 2019079064 W CN2019079064 W CN 2019079064W WO 2019192329 A1 WO2019192329 A1 WO 2019192329A1
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WIPO (PCT)
Prior art keywords
entity
protocol
indicator
lte
network
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PCT/CN2019/079064
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English (en)
Inventor
Caroline Jactat
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Jrd Communication (Shenzhen) Ltd
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Priority to CN201980018075.3A priority Critical patent/CN112314048B/zh
Publication of WO2019192329A1 publication Critical patent/WO2019192329A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/08—Protocols for interworking; Protocol conversion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/24—Negotiation of communication capabilities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H04W8/24—Transfer of terminal data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/02—Data link layer protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations

Definitions

  • Embodiments of the present invention generally relate to wireless communication systems and in particular to devices and methods for enabling a wireless communication device, such as a User Equipment (UE) or mobile device to access a Radio Access Technology (RAT) or Radio Access Network (RAN) , particularly but nor exclusively to integrated access backhaul.
  • a wireless communication device such as a User Equipment (UE) or mobile device to access a Radio Access Technology (RAT) or Radio Access Network (RAN) , particularly but nor exclusively to integrated access backhaul.
  • UE User Equipment
  • RAT Radio Access Technology
  • RAN Radio Access Network
  • Wireless communication systems such as the third-generation (3G) of mobile telephone standards and technology are well known.
  • 3G standards and technology have been developed by the Third Generation Partnership Project (3GPP) .
  • 3GPP Third Generation Partnership Project
  • the 3 rd generation of wireless communications has generally been developed to support macro-cell mobile phone communications.
  • Communication systems and networks have developed towards a broadband and mobile system.
  • LTE TM Long Term Evolution
  • E-UTRAN Evolved Universal Mobile Telecommunication System Territorial Radio Access Network
  • 5G or NR new radio
  • NR creates an opportunity to deploy integrated access and backhaul links for providing access to UEs.
  • An illustration example of a network with such integrated access and backhauls links is shown in Figure 1, where relay nodes can multiplex access and backhaul links in time, frequency, or space (e.g. beam-based operation) .
  • Relay based systems are to be designed for NR.
  • a relay node is designed to be low cost and lower power so that it can be easily and quickly deployed when needed. Such nodes can be deployed in several scenarios: in rural areas to enhance the coverage, urban hotspots to enhance the capacity in order to cope with the high user density, indoor hotspots to achieve high data throughput, etc.
  • Relay based systems also provide wireless backhaul connection to the Core Network.
  • the Layer 3 relay performs demodulation and decoding of Radio Frequency (RF) signals received, and then goes on to perform processing (such as ciphering and user-data concatenation/segmentation/reassembly) for retransmitting user data on a radio interface and further performs encoding/modulation and transmission to the Mobile Station (UE) .
  • processing such as ciphering and user-data concatenation/segmentation/reassembly
  • UE Mobile Station
  • the radio network architecture for achieving Layer 3 relay technology in LTE Advanced is shown in Figure 3.
  • the functions performed by the physical layer, Medium Access Control (MAC) /Radio Link Control (RLC) /Packet Data Convergence Protocol (PDCP) sublayers can be found in TS 36.300 for LTE system.
  • MAC Medium Access Control
  • RLC Radio Link Control
  • PDCP Packet Data Convergence Protocol
  • MAC/RLC/PDCP sublayers are described in TS 38.300.
  • SDAP Service Data Adaptation Protocol
  • QoS Quality of Service
  • LTE UE there is also the possibility for an LTE UE to connect to the Integrated Access and Backhaul (IAB) system, which is an attractive deployment use case for a NR mobile operator.
  • IAB Integrated Access and Backhaul
  • Support of backhauling of LTE access can be achieved by having an NR relay node (RN) connected to a Donor eNB (DeNB) as used in relaying for E-UTRAN as per TS 36.300.
  • the DeNB would give access to the Core Network.
  • the NR RN considering the packet is NR based and not LTE based, would not be aware that SDAP header is actually not present. There is actually no such SDAP protocol in LTE. Nevertheless, the packet would go through the SDAP protocol in which the presumed SDAP header would be removed. As a result, the first byte including part of the sequence number of the PDCP packet would be removed. Consequently, the NR RN would not be able to deliver the uplink PDCP packets in-sequence towards the Core Network.
  • the UE considering the packet is LTE based and not NR based would not be aware that SDAP header is actually present. There is actually no such SDAP protocol in LTE. Nevertheless, the packet would go through PDCP protocol wherein the presumed SDAP header (made up of RDI+RQI+QFI) would be interpreted as PDCP header. This is of course incorrect behaviour. As a result, the UE would not be able to deliver the downlink PDCP packets in-sequence towards the IP upper layers.
  • the problem can be formulated as: due to protocol stack mismatch, in-sequence delivery of IP packets is not ensured when LTE UE connects to a NR RN.
  • the present invention is seeking to solve at least some of the outstanding problems in this domain.
  • a method for enabling a wireless communication device to access services provided by a Radio Access Network in which a network protocol of a transmitting entity and a receiving entity are initially unknown to one another, the method comprising: a first entity of the transmitting entity or the receiving entity providing an indicator to the other entity indicative of the network protocol of the first entity such that the other entity is enabled to recognise the network protocol of the first entity from the indicator and to operate in accordance therewith when in communication with the first entity.
  • the transmitting entity and the receiving entity are operating on different network protocols and wherein the indicator is based on a layer structure of the different protocols.
  • the indicator is based on a layer structure difference which is indicated to the other entity.
  • the indicator comprises a header indicating a layer structure is absent or present in the protocol of one of the entities.
  • the indicator includes system information for indicating the nature of the protocol of the first entity.
  • the indicator is a packet type indicator that indicates the protocol of the packet.
  • the receiving entity can reselect to another transmitting entity if the indicator indicates some network protocol is not supported by the transmitting entity.
  • one protocol is LTE.
  • one protocol is NR.
  • the protocol of the other entity is WLAN.
  • the indicator avoids misinterpretation of data exchanged in the communication between the entities.
  • the Radio Access Network is a New Radio/5G network.
  • an equipment such as a BS or UE, comprising a processor, a storage unit and a communications interface, wherein the processor unit, storage unit, and communications interface are configured to perform the method of another aspect.
  • a non-transitory computer readable medium having computer readable instructions stored thereon for execution by a processor to perform the method of another aspect of the present invention.
  • the non-transitory computer readable medium may comprise at least one from a group consisting of: a hard disk, a CD-ROM, an optical storage device, a magnetic storage device, a Read Only Memory, a Programmable Read Only Memory, an Erasable Programmable Read Only Memory, EPROM, an Electrically Erasable Programmable Read Only Memory and a Flash memory.
  • Figure 1 is a simplified diagram showing integrated access and backhaul links.
  • Figure 2 is a simplified diagram showing a layer 3 relay.
  • Figure 3 is a simplified diagram showing a protocol stack from a layer 3 relay
  • FIG. 4 is a simplified diagram showing an SDAP header configuration, according to an embodiment of the present invention.
  • Figure 5 is a simplified diagram showing an RN internal implementation, according to an embodiment of the present invention.
  • FIG. 6 is a simplified diagram showing an LTE access via NR, according to an embodiment of the present invention.
  • FIG. 7 is a simplified diagram showing an LTE access via NR in which allowed information is exchanged between network nodes, according to an embodiment of the present invention.
  • Figure 8 is a simplified diagram showing a non NR PDU indication, according to an embodiment of the present invention.
  • the present invention relates to access from a mobile device to a radio access network based on so called 3GPP NR (New Radio) technology, a defined in TS 38.300 NR and the Next Generation Radio Access Network (NG-RAN) overall description and TS 38.401 NG-RAN architecture description.
  • 3GPP NR New Radio
  • NG-RAN Next Generation Radio Access Network
  • the present invention relates to access to Integrated Access Backhaul described in TR 38.874 where due to expected larger bandwidth availability along with native deployment of massive MIMO or multi-beam systems, NR creates an opportunity to deploy integrated access and backhaul links for providing access to UEs.
  • the invention is intended to provide a method and system to control access from the mobile device to the NR integrated network, also considering the UE can have other radio capability than NR (e.g. LTE) .
  • NR e.g. LTE
  • acontrol plane based solutions can configure the LTE UE with an SDAP configuration including SDAP-Header-Down Link (DL) /Uplink (UL) is absent.
  • DL SDAP-Header-Down Link
  • UL Uplink
  • NR RN implementation is adopted to avoid using SDAP protocol for an LTE UE i.e. NR RN internally considers the SDAP configuration for the LTE UE to include SDAP-Header-DL/UL is absent.
  • a further proposal depends on NR deployment schemes, an indication of whether legacy UE is allowed to connect to NR RN or not. This means that there is an indication that the LTE UE is allowed to transmit LTE data on a NR network.
  • a user plane based solutions can include an adaptation layer in the UE and NR RN in which an indication is added based on whether or not the packet is NR based. This enables a user plane transmission mechanism.
  • Solution 1 configure the LTE UE with an SDAP configuration including SDPA-Header-DL/UL is absent.
  • Solution 2 NR RN implementation to avoid using SDAP protocol for an LTE UE i.e. NR RN internally considers the SDAP configuration for the LTE UE to include SDAP-Header-DL/UL is absent.
  • Solution 1 and 2do not imply additional new signalling to the system however may rely on existing signalling with potential additional overheads.
  • NR In NR Non Standalone deployments where NR is associated with another non NR cell e.g. LTE cell, the LTE cell would indicate to LTE UE that it is allowed to transmit LTE packets over NG-Uu (the radio interface between BS and UE) .
  • Such indication as part of LTE broadcast (e.g. System Information (SI) ) or dedicated signalling in a Non-standalone (NSA) deployment.
  • SI System Information
  • NSA Non-standalone
  • such indication should to be part of NR broadcast (e.g. SI) or dedicated signalling.
  • a future proof deployment could be to allow any UE to connect.
  • the first NR RN deployments would rather consider an indication to disallow non NR UE to connect.
  • This solution has the advantage for the UE to know that LTE data can be transmitted onto an NR network, which basically should not have been the case. Also such solution avoids unnecessary access from the UE if NR backhaul does not actually support relaying of LTE data. The UE could then make a cell reselection to an (LTE) relay node instead of accessing such NR Relay Node and potentially be rejected from such access.
  • Solution 4 is an adaptation layer in the UE and NR RN which adds an indication of whether or not the packet is based on NR. This solution avoids interaction with control plane. This has advantage over control plane solutions above that LTE data can be transmitted whenever the LTE UE is connected to NR RN which does not need to configure the UE beforehand.
  • an LTE UE would connect to NR RN because there is no means preventing the UE to do so. As a consequence, in-sequence delivery would be no more be ensured.
  • CN Core Network
  • AMF Access and Mobility Management Function
  • UPF User Plane Function
  • TS 38.300 a Core Network
  • Donor eNB E-UTRAN access as per TS 36.300
  • LTE data represents an LTE packet transmission which can deal with data or signalling.
  • Figure 4 illustrates an embodiment for so called Solution 1, where the LTE UE is configured with SDAP-Header-DL/UL absence within the SDAP configuration.
  • the RN configures the UE to apply no SDAP header for uplink and downlink data transmission, which configuration is provided at step 2. Based on this configuration, the UE is also informed that LTE transmission is allowed on the NR RN.
  • the UE does not include any SDAP header upon transmitting data based on LTE protocol at step 3a.
  • the RN extracts the LTE protocol headers at step 3b to forward the IP data to CN. Downlink data transmission from the RN is not shown in this Figure however when the UE receives LTE transmission from the RN, the UE should consider that no SDAP header is present in the received LTE PDU.
  • Figure 5 illustrates the embodiment of so called Solution 2 where the NR RN implementation avoids using SDAP protocol for an LTE UE i.e. NR RN internally considers the SDAP configuration for the LTE UE to include SDAP-Header-DL/UL is absent.
  • the UE performs LTE transmission to the NR RN.
  • the UE is aware by some means (e.g. based on the embodiment of Solution 3) that such a transmission is possible.
  • the NR RN Upon receipt of the transmission, the NR RN is able to detect that the transmitted packet is based on LTE protocol (e.g. based on the embodiment of Solution 4) .
  • the NR RN then considers there is no SDAP header at step 1a and extracts the LTE protocol headers at step 1b to forward the IP data to CN at step 1c.
  • IP data is transmitted to the UE via the RN which encapsulates the IP data based on LTE protocol and does not add any SDAP header ahead of forwarding the LTE transmission to the UE at step 2b.
  • Figure 6 illustrates the embodiment of so called Solution 3where the UE receives an explicit indication that LTE access via NR is allowed.
  • the UE receives an indication from the NR or an LTE cell that LTE access via NR is allowed.
  • the UE can be also receive an indication as to which RN entity (in the form of e.g. a Physical Cell Identity) supports such access.
  • RN entity in the form of e.g. a Physical Cell Identity
  • the UE considers LTE transmission is allowed and potentially onto which RN entity.
  • the UE performs LTE transmission.
  • RN extracts the LTE protocol headers at step 2b to forward the IP data to CN at step 2c.
  • Figure 7 illustrates another embodiment of Solution 3where the LTE access via NR allowed information is exchanged between network nodes.
  • NR supports relaying in having a Donor gNB (DgNB) may be wirelessly connected to the gNB via a modification of the NG-Uu radio interface called NG-Uu’ .
  • DgNB Donor gNB
  • NG-Uu NG-Uu radio interface
  • the NR RN connects to a Donor ng-eNB (Dng-eNB) wirelessly connected to the ng-eNB providing E-UTRA user plane and control plane protocol terminations towards the UE.
  • Dng-eNB Donor ng-eNB
  • a given NR RN can be simultaneously connected to a DgNB and a Dng-eNB, thus providing EN-DC (E-UTRA NR dual connectivity) or NE-DC (NR E-UTRA dual connectivity) configuration to a UE.
  • EN-DC E-UTRA NR dual connectivity
  • NE-DC NR E-UTRA dual connectivity
  • the Donors provide NG and Xn proxy functionality between the RN and other network nodes (gNBs, ng-eNBs, Core Network (CN) entities) , such proxy functionality includes passing UE-dedicated NG and Xn signalling messages and GPRS Tunnelling Protocol GTP data packets along with the NG’ and Xn’ interfaces, NG’ and Xn’ being modifications based on NG and Xn interfaces respectively.
  • the RN firstly attaches for RN pre-configuration and then attaches for RN operation based on Donors list provided at pre-configuration.
  • Donors list whether the Donor supports LTE backhauling would be indicated depending on whether the Donor is a DgNB connected to gNB or a Dng-eNB connected to ng-eNB.
  • the NR RN can select a Donor supporting LTE backhauling and/or a Donor not supporting LTE backhauling depending on whether the NR RN allows the LTE UE to connect.
  • NR RN can indicate whether LTE access is supported or not as discussed above with reference to Solution 3, step 1. Based on the indication, the LTE UE would reselect to another RN supporting LTE access if possible. This has an advantage of avoiding a connection to an RN not supporting LTE access and rejection by such RN.
  • Figure 8 illustrates the embodiment of so called Solution 4 where an indication of transmission type is provided along with the transmitted packet.
  • the UE upon LTE transmission, the UE provides an indication thereof.
  • a variant of the LTE transmission can be that the UE transmits an NR PDU encapsulating an LTE PDU and provides in the NR PDU header the “LTE based data indicator” information that an LTE PDU is embedded. Based on such information, the RN infers that an RN PDU is not transmitted but an LTE PDU is. Then the RN extracts the LTE protocol headers at step 1b to forward the IP data to CN at step 1c.
  • This type of indication may not be necessary for LTE transmission from the RN by the UE where the UE knows it can receive such transmission from the RN (e.g. based on Solution 2, steps 2/2a/2b) .
  • the present invention provides a number of possible solutions either alone or in combination which prevents protocol stack mismatching and enables the successful delivery of IP packets between different types of network, for example between an LTE UE and an NR RN.
  • WLAN UE accessing the IAB via NR RN.
  • any of the devices or apparatus that form part of the network may include at least a processor, a storage unit and a communications interface, wherein the processor unit, storage unit, and communications interface are configured to perform the method of any aspect of the present invention. Further options and choices are described below.
  • the signal processing functionality of the embodiments of the invention especially the gNB and the UE may be achieved using computing systems or architectures known to those who are skilled in the relevant art.
  • Computing systems such as, a desktop, laptop or notebook computer, hand-held computing device (PDA, cell phone, palmtop, etc. ) , mainframe, server, client, or any other type of special or general purpose computing device as may be desirable or appropriate for a given application or environment can be used.
  • the computing system can include one or more processors which can be implemented using a general or special-purpose processing engine such as, for example, a microprocessor, microcontroller or other control module.
  • the computing system can also include a main memory, such as random access memory (RAM) or other dynamic memory, for storing information and instructions to be executed by a processor. Such a main memory also may be used for storing temporary variables or other intermediate information during execution of instructions to be executed by the processor.
  • the computing system may likewise include a read only memory (ROM) or other static storage device for storing static information and instructions for a processor.
  • ROM read only memory
  • the computing system may also include an information storage system which may include, for example, a media drive and a removable storage interface.
  • the media drive may include a drive or other mechanism to support fixed or removable storage media, such as a hard disk drive, a floppy disk drive, a magnetic tape drive, an optical disk drive, a compact disc (CD) or digital video drive (DVD) read or write drive (R or RW) , or other removable or fixed media drive.
  • Storage media may include, for example, a hard disk, floppy disk, magnetic tape, optical disk, CD or DVD, or other fixed or removable medium that is read by and written to by media drive.
  • the storage media may include a computer-readable storage medium having particular computer software or data stored therein.
  • an information storage system may include other similar components for allowing computer programs or other instructions or data to be loaded into the computing system.
  • Such components may include, for example, a removable storage unit and an interface , such as a program cartridge and cartridge interface, a removable memory (for example, a flash memory or other removable memory module) and memory slot, and other removable storage units and interfaces that allow software and data to be transferred from the removable storage unit to computing system.
  • the computing system can also include a communications interface.
  • a communications interface can be used to allow software and data to be transferred between a computing system and external devices.
  • Examples of communications interfaces can include a modem, a network interface (such as an Ethernet or other NIC card) , a communications port (such as for example, a universal serial bus (USB) port) , a PCMCIA slot and card, etc.
  • Software and data transferred via a communications interface are in the form of signals which can be electronic, electromagnetic, and optical or other signals capable of being received by a communications interface medium.
  • computer program product may be used generally to refer to tangible media such as, for example, a memory, storage device, or storage unit.
  • These and other forms of computer-readable media may store one or more instructions for use by the processor comprising the computer system to cause the processor to perform specified operations.
  • Such instructions generally referred to as ‘computer program code’ (which may be grouped in the form of computer programs or other groupings) , when executed, enable the computing system to perform functions of embodiments of the present invention.
  • the code may directly cause a processor to perform specified operations, be compiled to do so, and/or be combined with other software, hardware, and/or firmware elements (e.g., libraries for performing standard functions) to do so.
  • the non-transitory computer readable medium may comprise at least one from a group consisting of: a hard disk, a CD-ROM, an optical storage device, a magnetic storage device, a Read Only Memory, a Programmable Read Only Memory, an Erasable Programmable Read Only Memory, EPROM, an Electrically Erasable Programmable Read Only Memory and a Flash memory
  • the software may be stored in a computer-readable medium and loaded into computing system using, for example, removable storage drive.
  • a control module in this example, software instructions or executable computer program code
  • the processor in the computer system when executed by the processor in the computer system, causes a processor to perform the functions of the invention as described herein.
  • inventive concept can be applied to any circuit for performing signal processing functionality within a network element. It is further envisaged that, for example, a semiconductor manufacturer may employ the inventive concept in a design of a stand-alone device, such as a microcontroller of a digital signal processor (DSP) , or application-specific integrated circuit (ASIC) and/or any other sub-system element.
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • aspects of the invention may be implemented in any suitable form including hardware, software, firmware or any combination of these.
  • the invention may optionally be implemented, at least partly, as computer software running on one or more data processors and/or digital signal processors or configurable module components such as FPGA devices.
  • the elements and components of an embodiment of the invention may be physically, functionally and logically implemented in any suitable way. Indeed, the functionality may be implemented in a single unit, in a plurality of units or as part of other functional units.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Databases & Information Systems (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé permettant à un dispositif de communication sans fil d'accéder à des services fournis par un réseau d'accès radio dans lequel les protocoles de réseau d'une entité d'émission et d'une entité de réception sont initialement inconnus l'un de l'autre, ledit procédé comprenant l'étape suivante : une première entité parmi l'entité de transmission ou l'entité de réception fournit un indicateur à l'autre entité indiquant le protocole de réseau de la première entité de façon à ce que l'autre entité puisse reconnaître le protocole de réseau de la première entité à partir de l'indicateur et fonctionner conformément à celui-ci lorsqu'elle est en communication avec la première entité.
PCT/CN2019/079064 2018-04-05 2019-03-21 Améliorations apportées ou se rapportant à une liaison terrestre d'accès intégrée WO2019192329A1 (fr)

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GB1805667.1A GB2572754B (en) 2018-04-05 2018-04-05 Indicating supported network protocols
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