After last week's 3GPP group meeting, 5G has completed the standard research of independent networking and some non-independent networking, so what will 5G do in the future?
The standard version of the next version will be finalized at the 3GPP RAN Plenary in June. Due to the reform of the project mechanism, all RAN1/2 projects need to be discussed in the RAN_draft mail group first, so Xiaobian compiled the project that is currently being discussed in the mail for your reference, from which you can see that 5G will do it in the future.
候选 Candidates for NR include the following directions:
Mobility enhancement
Mobility has always been a key indicator of the radio access network. The NR SA standard only completes basic mobility support and can only meet the mobility requirements of IMT2020 in specific scenarios, so it is necessary to further enhance mobility. Research goals include improving the reliability of the mobile process and reducing the disruption caused by movement.
Unlicensed spectrum access
Unlicensed spectrum has been studied in LTE, and NR is also considered to be a technology that can increase system capacity.
Flexible duplex
Flexible duplexing can effectively reduce interference between co-frequency cells and FDD/TDD systems and improve resource utilization. The main research direction is inter-link interference cancellation.
V2X enhancement
NR V2X focuses on the advanced V2X application scenario defined by SA1 and forms a complementary relationship with LTE V2X. Research objectives include Sidelink design, Uu enhancement for advanced V2X application scenarios, Uu-assisted sidelink scheduling, access technology selection, QoS management and coexistence with LTE V2X.
Multi-access technology DC enhancement
At R15, NR introduces split SRB for improved robustness, whereas radio link failure is judged based on the channel quality of the MN. The main research goal is to quickly restore MN links through the SN link.
Network slice
At R15, the network side of the wireless side does not introduce a solution, and resource isolation and differential processing are all solved by the network implementation. The network slice of R16 is intended to enable the wireless side to perceive slices.
Non-land network solution
Rather than using terrestrial base stations to provide services, multiple operators have come up with the need to use satellite or high-altitude platforms to provide services, so it is necessary to define the necessary enhancements. The R16 will first assess the impact on existing standards, including physical layer control mechanisms, random access and HARQ, high-level transmission delays, paging, handover, and system architecture. Then find the right solution.
Positioning
Many new applications and vertical industries require precise positioning capabilities such as LBS, transportation and drones. The main research contents include the definition of positioning technology that does not depend on access technology based on Uu and PC5, and the positioning technology that relies on access technology.
System design for bands above 52 GHz
The NR design is currently only for the 52 GHz band, and for the 52 GHz to 100 GHz band, the waveform and physical channel need to be redesigned.
Coverage enhancement
Compared to LTE, NR may be deployed at higher frequencies. Companies have different understandings of whether NR coverage can meet the requirements. The research includes evaluating whether there is a problem with the coverage of the NR, and if there is a problem, defining a corresponding solution.
Energy saving
UE energy consumption largely affects the user experience, and further energy-saving enhancements are of great help to the sustainability of NR. Research objectives include wake-up signals and DRX enhancement.
Increased spectrum utilization
During the LTE standard research process, CA continued to enhance to continuously improve spectrum utilization. The NR will also continue to improve spectrum utilization, and the research objectives include enhancements such as CA, DC, SUL, and BWP.
URLLC
R15 has defined some solutions to shorten the delay and improve reliability, and can support some basic application scenarios, such as AR/VR. R16 needs to be further enhanced to meet more application scenarios, such as industrial manufacturing, power control.
voice
R15 NR has only limited support for voice, and R16 is further enhanced for voice, with research goals including voice, video and TCP.
broadcast
Multicast broadcasting can provide efficient transmission for UEs that need compatible services. The main research contents include the design of broadcast channels, dynamic configuration of broadcast areas, and dynamic switching of unicast multicast broadcasts.
data collection
LTE implements functions such as MDT, SON, and SRO. It can be used to collect network data and assist network planning network optimization. The main research goal is to implement similar functions in NR.
IoT/MTC enhancement
For NR IoT, the main research content includes industrial IoT (high reliability, low latency, positioning, precise synchronization, wireless Ethernet), UE categories for new application scenarios and coexistence with N-IoT and LTE-MTC.
MIMO enhancement
Research directions for MIMO enhancement include multi-user MIMO enhancement, multi-TRP enhancement, uplink MIMO coverage enhancement, reference signal enhancement, and beam management.
In addition to the NR project, LTE will continue to evolve. The candidate for LTE includes the following directions:
Uplink enhancement for fixed UE
For fixed UEs, such as CPE type UEs, R15 does some enhancements, and similar enhancements are needed for uplinks. The research includes enhanced uplink MIMO, more accurate uplink channel measurement, uplink reference signal optimization and inter-cell coordination techniques.
Mobility enhancement
Although LTE has made some mobility enhancements in R14, due to lack of time, the final standardized solution can only be applied in very limited scenarios (inter-frequency handover, UE has dual-receiving capability, TA can be reused), resulting in basic failure. Applied in the actual network. Therefore, R16 hopes to further enhance mobility, improve the reliability of the handover process and shorten the interruption caused by handover in a wider range of scenarios.
Smoke Alarm,Smoke Detector,Smart Smoke Alarm,Wireless Smoke Alarms
ZHEJIANG QIANNA ELECTRIC CO.,LTD , https://www.traner-elec.com