Posts

5G Physical And MAC Layer Procedures Part-2 Updated In 2024

Image
  Introduction In the fast-evolving landscape of 5G technology, the procedures involving the Physical Random Access Channel (PRACH) and Medium Access Control (MAC) layers play a vital role in ensuring seamless communication between devices and the network. This article delves into critical updates to the 5G Physical and MAC Layer Procedures, highlighting advancements made in 2024. We will cover key aspects such as PRACH occasions, Random Access (RA) procedures, power control mechanisms, and the intricacies of contention resolution. Understanding PRACH Occasions and Their Validity In 5G Some PRACH occasions may not be valid if they collide with SS/PBCH Blocks or other downlink transmissions. This can cause the Association Period to change over time, and to consequently generate a pattern of Association Periods. 3GPP TS 38.413 specifies that a pattern of Association Periods must repeat with a maximum period of 160 ms. This repetition period is known as an Association Pattern Period. Figu
Post a Comment
Read more

5G Physical And MAC Layer Procedures Part-1 Updated In 2024

Image
  Introduction In the realm of 5G technology, understanding the 5G physical and MAC layer procedures is crucial for anyone involved in telecommunications. This blog post delves into the intricacies of the Random Access procedures in 5G, focusing on the updated procedures as of 2024. We will explore the two main categories of Random Access: Contention Based Random Access (CBRA) and Contention Free Random Access (CFRA), providing a detailed overview of how they function, their use cases, and their significance in 5G networks. Random Access Procedures In 5G There are 2 categories of the Random Access procedure: Contention Based Random Access (CBRA) Contention Free Random Access (CFRA) The ‘Contention Based’ procedure allows the UE to select a random access preamble from a pool of preambles shared with other UE. This means that the UE risks selecting the same preamble as another UE and subsequently experiencing contention. The ‘Contention Free’ procedure requires the Base Station to alloca
Post a Comment
Read more

5G Voice Services Part-2 Updated In 2024

Image
  Introduction The evolution of 5G networks continues to revolutionize the telecommunications landscape, particularly in the realm of voice services. As we move into 2024, updated protocols and techniques are enabling more efficient, high-quality voice communications over 5G. This blog will explore the latest advancements in 5G voice services, focusing on key aspects such as header compression, VoNR, and fallback procedures. 5g Voice Services Overview Header Compression in 5G Networks The protocol stack layers targeted by header compression are illustrated in Figure below. Header compression operates between the UE and the Base Station so it benefits the Radio Access Network but does not benefit the connection from the Base Station towards the IMS. Header compression generates a significant increase in air-interface capacity in terms of the maximum number of supported speech connections. Figure below compares the throughput requirement for Circuit Switched voice over 3G when using a De
Post a Comment
Read more

5G Voice Services Part-1 Updated In 2024

Image
  Introduction To 5G Voice Services As the telecommunications industry evolves, so does the technology that supports 5G voice services. With the advent of 5G, voice services are transitioning from legacy systems to more advanced architectures that promise greater efficiency and quality. This blog will delve into the intricacies of 5G voice services, exploring the transition from 2G/3G systems to 5G, and the new technologies that support voice over 5G. Legacy Voice Services: 2G and 3G Legacy 2G and 3G networks support voice services using Circuit Switched (CS) connections which benefit from dedicated resources throughout the lifetime of each call. 4G networks do not support the CS domain so arc unable to provide CS services. However, CS Fallback procedures can be used to move connections from a 4G network to a 2G or 3G network whenever there is a requirement to establish a CS connection. CS Fallback procedures rely upon the 5Gs interface between the MME and MSC when moving a connection
Post a Comment
Read more