Sign in Subscribe

gbr lte

Last updated on 

LTE Overview:

LTE, or Long-Term Evolution, is a standard for wireless broadband communication for mobile devices and data terminals. It provides significantly higher data rates than its predecessors in the GSM/UMTS family of cellular networks. LTE is based on OFDMA (Orthogonal Frequency Division Multiple Access) for the downlink and SC-FDMA (Single Carrier Frequency Division Multiple Access) for the uplink.

Quality of Service (QoS) in LTE:

One of the critical aspects of LTE networks is ensuring quality of service (QoS) for different types of applications and services. QoS mechanisms are essential to provide the required level of performance for services like voice, video streaming, and real-time gaming.

GBR (Guaranteed Bit Rate):

GBR is a QoS parameter defined in the LTE standard to ensure a specific minimum data rate for a particular user or service. When a particular service or application requires a guaranteed level of performance, GBR can be configured to allocate the necessary resources in the LTE network.

Technical Details:

  1. Traffic Classes in LTE: LTE networks classify traffic into different classes based on their QoS requirements. These classes help in allocating network resources efficiently. GBR is one of the traffic classes defined in LTE.
  2. Resource Allocation: With GBR, a specific amount of radio resources (both in terms of bandwidth and time) is reserved for a user or service. This reservation ensures that the user or service receives the guaranteed data rate without degradation.
  3. Bearer Establishment: In LTE, a "bearer" refers to a virtual connection between the UE (User Equipment) and the core network. When establishing a GBR bearer, the network ensures that the necessary resources are allocated to meet the guaranteed bit rate requirements.
  4. Dynamic Resource Management: While GBR guarantees a minimum bit rate, LTE networks also employ dynamic resource management techniques. This means that if additional resources are available and not being utilized by GBR bearers, they can be dynamically allocated to other non-GBR bearers or services.
  5. Latency and Jitter: Apart from the guaranteed bit rate, GBR also helps in controlling latency and jitter, which are crucial for real-time applications like VoIP (Voice over IP) and video conferencing. By ensuring a consistent bit rate, GBR helps in maintaining low latency and minimizing jitter.