Wireless ATM: air interface and network protocols of the mobile broadband system

1996 ◽  
Vol 3 (4) ◽  
pp. 50-56 ◽  
Author(s):  
B. Walke ◽  
D. Petras ◽  
D. Plassmann
Keyword(s):  
Network Protocols ◽  
Wireless Atm ◽  
Mobile Broadband ◽  
Air Interface ◽  
Mobile Broadband System

scholarly journals RF Driven 5G System Design for Centimeter Waves

2018 ◽  
Vol 2018 ◽  
pp. 1-9
Author(s):  
Pekka Pirinen ◽  
Harri Pennanen ◽  
Ari Pouttu ◽  
Tommi Tuovinen ◽  
Nuutti Tervo ◽  
...  
Keyword(s):  
Radio Frequency ◽  
System Design ◽  
Statistical Modeling ◽  
Frequency Band ◽  
Radio Channel ◽  
Concept Development ◽  
Measurement Campaign ◽  
Mobile Broadband ◽  
Air Interface ◽  
Complex Process

5G system design is a complex process due to a great variety of applications and their diverse requirements. This article describes our experiences in developing a centimeter waves mobile broadband concept satisfying future capacity requirements. The first step in the process was the radio channel measurement campaign and statistical modeling. Then the link level design was performed tightly together with the radio frequency (RF) implementation requirements to allow as large scalability of the air interface as possible. We started the concept development at 10 GHz frequency band and during the project World Radiocommunication Conference 2015 selected somewhat higher frequencies as new candidates for 5G. Thus, the main learning was to gain insight of interdependencies of different phenomena and find feasible combinations of techniques and parameter combinations that might actually work in practice, not only in theory.

scholarly journals MULTIPLE-ACCESS TECHNOLOGY OF CHOICE IN 3GPP LTE

2013 ◽  
Vol 6 (2) ◽  
pp. 321-328
Author(s):  
Ibikunle Frank ◽  
Dike Ike ◽  
Ajayi Jimi ◽  
Onasoga Kayode
Keyword(s):  
Network Architecture ◽  
Multiple Access ◽  
Access Network ◽  
Performance Comparison ◽  
Frequency Division ◽  
Mobile Broadband ◽  
3Gpp Lte ◽  
Single Carrier ◽  
Radio Access ◽  
Air Interface

Third-Generation Partnership Project (3GPP) standardizes an Evolved UMTS Terrestrial Radio Access Network (EUTRAN)as air interface in its release 8 LTE. Orthogonal Frequency Division Multiple Access(OFDMA) and Single Carrier-Frequency Division Multiple Access(SC-FDMA)are key technologies for the air interface of mobile broadband systems.It is evident that mobile broadband access technologies are reaching a commonality in the air interface and networking architecture; they are being converged to an IP-based network architecture with OFDMA based air interface technology. The air interface of E-UTRAN is based on OFDMA in downlink and SC-FDMA in the uplink, making it possible to efficientl utilize bandwidth due to the orthogonally between sub-carriers and by assigning subsets of sub-carriers to individual users which allows for simultaneous data rate transmission from several users and differentiated quality of service for each user. In this paper, wehighlight the technologies behindOFDMA and SC-FDMA and also carry out performance comparison of the two air interface technologies. We brieflydescribe the 3GPP LTE standard, and its implementation using OFDMA and SC-FDMA technology.

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