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Showing posts with label Release 15. Show all posts
Showing posts with label Release 15. Show all posts

Tuesday, 27 June 2017

Mission Critical Services update from 3GPP - June 2017


3GPP has published an overview of what has been achieved so far in the Mission Critical and also provides an outlook of what can be expected in the near future. A more detailed paper summarizing the use cases and functional aspects of Rel-13, Rel-14 and upcoming Rel-15 will be published later this year.

Mission Critical Services – Detailed List of Rel-13, Rel-14 and Rel-15 Functionalities

Rel-13 MCPTT (completed 2016)
  • User authentication and service authorization
  • Configuration
  • Affiliation and de-affiliation
  • Group calls on-network and off-network (within one system or multiple systems, pre-arranged or chat model, late entry, broadcast group calls, emergency group calls, imminent peril group calls, emergency alerts)
  • Private calls on-network and off-network (automatic or manual commencement modes, emergency private calls)
  • MCPTT security
  • Encryption (media and control signalling)
  • Simultaneous sessions for call
  • Dynamic group management (group regrouping)
  • Floor control in on-network (within one system or across systems) and in off-network
  • Pre-established sessions
  • Resource management (unicast, multicast, modification, shared priority)
  • Multicast/Unicast bearer control, MBMS (Multimedia Broadcast/Multicast Service) bearers
  • Location configuration, reporting and triggering
  • Use of UE-to-network relays
Rel-14 MC Services (completed 2017)
MC Services Common Functionalities:
  • User authentication and service authorization
  • Service configuration
  • Affiliation and de-affiliation
  • Extended Location Features
  • (Dynamic) Group Management
  • Identity management
  • MC Security framework
  • Encryption (media and control signalling)
MCPTT Enhancements:
  • First-to-answer call setup (with and without floor control)
  • Floor control for audio cut-in enabled group
  • Updating the selected MC Service user profile for an MC Service
  • Ambient listening call
  • MCPTT private call-back request
  • Remote change of selected group
MCVideo, Common Functions plus:
  • Group Call (including emergency group calls, imminent peril group calls, emergency alerts)
  • Private Call (off-network)
  • Transmission Control
MCData, Common Functions plus:
  • Short Data Service (SDS)
  • File Distribution (FD) (on-network)
  • Transmission and Reception Control
  • Handling of Disposition Notifications
  • Communication Release
Rel-15 MC Services (in progress)

MC Services Common Functionalities Enhancements:
  • Enhanced MCPTT group call setup procedure with MBMS bearer
  • Enhanced Location management, information and triggers
  • Interconnection between 3GPP defined MC systems
  • Interworking with legacy systems

MCPTT Enhancements:
  • Remotely initiated MCPTT call
  • Enhanced handling of MCPTT Emergency Alerts
  • Enhanced Broadcast group call
  • Updating pre-selected MC Service user profile
  • Temporary group call - user regroup
  • Functional alias identity for user and equipment
  • Multiple simultaneous users
MCVideo Additions:
  • Video push
  • Video pull
  • Private call (on-network)
  • Broadcast Group Call
  • Ambient Viewing Call
  • Capability information sharing
  • Simultaneous Sessions
  • Use of MBMS transmission
  • Emergency and imminent peril private communications
  • Primary and Partner MC system interactions for MCVideo communications
  • Remote video parameters control capabilities

MCData Additions:
  • MCData specific Location
  • Enhanced Status
  • Accessing list of deferred communications
  • Usage of MBMS
  • Emergency Alert
  • Data streaming
  • File Distribution (FD) (off-network)
  • IP connectivity

Release-14 features will be available by end of September 2017 and many Release-15 features, that is being hurried due to 5G will be available by June 2018.

For more details, follow the links below:



Thursday, 20 April 2017

5G: Architecture, QoS, gNB, Specifications - April 2017 Update


The 5G NR (New Radio) plan was finalised in March (3GPP press release) and as a result Non-StandAlone (NSA) 5G NR will be finalised by March 2018. The final 3GPP Release-15 will nevertheless include NR StandAlone (SA) mode as well.

NSA is based on Option 3 (proposed by DT). If you dont know much about this, then I suggest listening to Andy Sutton's lecture here.


3GPP TR 38.804: Technical Specification Group Radio Access Network; Study on New Radio Access Technology; Radio Interface Protocol Aspects provides the overall architecture as shown above

Compared to LTE the big differences are:

  • Core network control plane split into AMF and SMF nodes (Access and Session Management Functions). A given device is assigned a single AMF to handle mobility and AAA roles but can then have multiple SMF each dedicated to a given network slice
  • Core network user plane handled by single node UPF (User Plane Function) with support for multiple UPF serving the same device and hence we avoid need for a common SGW used in LTE. UPF nodes may be daisy chained to offer local breakout and may have parallel nodes serving the same APN to assist seamless mobility.

Hat tip Alistair Urie.
Notice that like eNodeB (eNB) in case of LTE, the new radio access network is called gNodeB (gNB). Martin Sauter points out in his excellent blog that 'g' stands for next generation.

3GPP TS 23.501: Technical Specification Group Services and System Aspects; System Architecture for the 5G System; Stage 2 provides architecture model and concepts including roaming and non-roaming architecture. I will probably have to revisit as its got so much information. The QoS table is shown above. You will notice the terms QFI (QoS Flow Identity) & 5QI (5G QoS Indicator). I have a feeling that there will be a lot of new additions, especially due to URLLC.

Finally, here are the specifications (hat tip Eiko Seidel for his excellent Linkedin posts - references below):
5G NR will use 38 series (like 25 series for 3G & 36 series for 4G).

RAN3 TR 38.801 v2.0.0 on Study on New Radio Access Technology; Radio Access Architecture and Interfaces

RAN1 TR 38.802 v2.0.0 on Study on New Radio (NR) Access Technology; Physical Layer Aspects

RAN4 TR 38.803 v2.0.0 on Study on New Radio Access Technology: RF and co-existence aspects

RAN2 TR 38.804 v1.0.0 on Study on New Radio Access Technology; Radio Interface Protocol Aspects

38.201 TS Physical layer; General description
38.211 TS Physical channels and modulation
38.212 TS Multiplexing and channel coding
38.213 TS Physical layer procedures
38.214 TS Physical layer measurements
38.21X TS Physical layer services provided to upper layer
38.300 TS Overall description; Stage-2
38.304 TS User Equipment (UE) procedures in idle mode
38.306 TS User Equipment (UE) radio access capabilities
38.321 TS Medium Access Control (MAC) protocol specification
38.322 TS Radio Link Control (RLC) protocol specification
38.323 TS Packet Data Convergence Protocol (PDCP) specification
38.331 TS Radio Resource Control (RRC); Protocol specification
37.3XX TS [TBD for new QoS]
37.3XX TS Multi-Connectivity; Overall description; Stage-2
38.401 TS Architecture description
38.410 TS NG general aspects and principles
38.411 TS NG layer 1
38.412 TS NG signalling transport
38.413 TS NG Application Protocol (NGAP)
38.414 TS NG data transport
38.420 TS Xn general aspects and principles
38.421 TS Xn layer 1
38.422 TS Xn signalling transport
38.423 TS Xn Application Protocol (XnAP)
38.424 TS Xn data transport
38.425 TS Xn interface user plane protocol
38.101 TS User Equipment (UE) radio transmission and reception
38.133 TS Requirements for support of radio resource management
38.104 TS Base Station (BS) radio transmission and reception
38.307 TS Requirements on User Equipments (UEs) supporting a release-independent frequency band
38.113 TS Base Station (BS) and repeater ElectroMagnetic Compatibility (EMC)
38.124 TS Electromagnetic compatibility (EMC) requirements for mobile terminals and ancillary equipment
38.101 TS User Equipment (UE) radio transmission and reception
38.133 TS Requirements for support of radio resource management
38.104 TS Base Station (BS) radio transmission and reception
38.141 TS Base Station (BS) conformance testing

Note that all specifications are not in place yet. Use this link to navigate 3GPP specs: http://www.3gpp.org/ftp/Specs/archive/38_series/

Further reading:



Sunday, 14 August 2016

3GPP Release-14 & Release-15 update

3GPP is on track for 5G as per a news item on the 3GPP website. In 5G World in London in June, Erik Guttman, 3GPP TSG SA Chairman, and Consultant for Samsung Electronics spoke about progress on Release-14 and Release-15. Here is his presentation.



According to 3GPP:

The latest plenary meeting of the 3GPP Technical Specifications Groups (TSG#72) has agreed on a detailed workplan for Release-15, the first release of 5G specifications.
The plan includes a set of intermediate tasks and check-points (see graphic below) to guide the ongoing studies in the Working Groups. These will get 3GPP in a position to make the next major round of workplan decisions when transitioning from the ongoing studies to the normative phase of the work in December 2016:- the start of SA2 normative work on Next Generation (NexGen) architecture and in March 2017:- the beginning of the RAN Working Group’s specification of the 5G New Radio (NR).
3GPP TSG RAN further agreed that the target NR scope for Release 15 includes support of the following:
  • ■ Standalone and Non-Standalone NR operation (with work for both starting in conjunction and running together)
    • ■ Non-standalone NR in this context implies using LTE as control plane anchor. Standalone NR implies full control plane capability for NR.
    • ■ Some potential architecture configuration options are shown in RP-161266 for information and will be analyzed further during the study
  • ■ Target usecases: Enhanced Mobile Broadband (eMBB), as well as Low Latency and High Reliability to enable some Ultra-Reliable and Low Latency Communications (URLCC) usecases
  • ■ Frequency ranges below 6GHz and above 6GHz
During the discussion at TSG#72 the importance of forward compatibility - in both radio and protocol design - was stressed, as this will be key for phasing-in the necessary features, enabling all identified usecases, in subsequent releases of the 5G specification.


Telecom TV has posted a video interview with Erik Guttman which is embedded below:



Related posts:



Monday, 21 September 2015

Updates from the 3GPP RAN 5G Workshop - Part 1

3GPP held a 5G Workshop in Phoenix last week. 550 delegates and over 70 presentations contributed to the discussion, which covered the full range of requirements that will feed TSG RAN work items for the next five years. I will eventually look at all the presentations and highlight the ones that I find interesting as a part of this blog. Due to the vast number of presentations, I will split them into a few blog posts.

Lets start with the chairman summary. The chair highlighted three high level use cases that 5G needs to address (This has been highlighted in many presentations, see here for example):
  • Enhanced Mobile Broadbandare 
  • Massive Machine Type Communications
  • Ultra-reliable and Low Latency Communications
As can be seen in the picture above, 3GPP is planning to split the 5G work into two phases. Phase 1 (Rel-15) will look at a subset of requirements that are important for the commercial needs of the day. Phase 2 (Rel-16) will look at more features, use cases, detailed requirements, etc.

Here is the chair summary of the workshop:




The presentation (RWS-150002) from Motorola/Lenovo highlighted the need to handle different spectrum. For sub-6GHz, the existing air interface could work with slight modifications. For spectrum between 6GHz and 30GHz, again a similar air interface like 4G may be good enough but for above 30GHz, there is a need for new one die to phase noise.

The presentation by CATT or China Academy of Telecommunication Technology (RWS-150003) is quite interesting and is embedded below. They also propose Pattern Division Multiple Access (PDMA).




Orange (RWS-150004) has definitely put a thought into what good 5G would be. Their presentation is embedded below too:




The presentation from Huawei (RWS-150006) introduced the concept of Unified Air Interface, UAI.



They presentation also explains the concept of Adaptive Frame structures and RAN slicing very well. For those who may be wondering, uMTC stands for ultra-reliable MTC and mMTC stands for massive MTC. RAN slicing enables the RAN to be partitioned such that a certain amount of carriers are always dedicated to a certain services independently of other services. This ensures that the service in the slice is always served reliably.

The final presentation is the vision and priorities by 5GPPP as follows:



Sunday, 19 April 2015

3GPP Release-13 work started in earnest


The 3GPP news from some months back listed the main RAN features that have been approved for Release-13 and the work has already started on them. The following are the main features (links contain .zip files):

  • LTE in unlicensed spectrum (aka Licensed-Assisted Access) - RP-150055
  • Carrier Aggregation enhancements - RP-142286
  • LTE enhancements for Machine-Type Communications (MTC) - RP-141865
  • Enhancements for D2D - RP-142311
  • Study Item Elevation Beamforming / Full-Dimension MIMO - RP-141831
  • Study Item Enhanced multi-user transmission techniques - RP-142315
  • Study Item Indoor positioning - RP-141102
  • Study Item Single-cell Point-to-Multipoint (SC-PTM) - RP-142205


Another 3GPP presentation from late last year showed the system features that were being planned for Rel-13 as shown above.

I have also posted a few items earlier relating to Release13, as follows:


Ericsson has this week published a whitepaper on release 13, with a vision for 'Networked Society':
The vision of the Networked Society, where everything that benefits from being connected will be connected, places new requirements on connectivity. LTE is a key component in meeting these demands, and LTE release 13 is the next step in the LTE evolution.
Their whitepaper embedded below:



It should be pointed out that 5G work does not start until Release-15 as can be seen from my tweet

xoxoxo Added Later (26/04/2015) xoxoxo
I came across this presentation from Keysight (Agilent) where Moray Rumney has provided information in much more detail.