Sign in Subscribe

HIPERLAN

Last updated on 

HIPERLAN stands for "High-Performance Radio Local Area Network." It's a set of wireless communication standards developed in Europe for wireless local area networks (WLANs). The HIPERLAN standards are designed to provide high-speed communication in indoor and outdoor environments, particularly for multimedia applications.

Technical Details:

  1. HIPERLAN/1:
    • Frequency Band: Operates in the 5 GHz band.
    • Data Rates: Supports data rates up to 23.5 Mbps.
    • Modulation: Utilizes QPSK (Quadrature Phase Shift Keying) modulation for data transmission.
    • Access Mechanism: Utilizes a Time Division Multiple Access (TDMA) mechanism, where time slots are allocated to different users to transmit data.
  2. HIPERLAN/2:
    • Frequency Band: Also operates in the 5 GHz band, but can potentially operate in the 17 GHz band for outdoor applications.
    • Data Rates: Provides higher data rates compared to HIPERLAN/1, supporting up to 54 Mbps.
    • Modulation: Uses OFDM (Orthogonal Frequency Division Multiplexing) modulation, which is efficient in handling multipath interference and provides robustness against fading and interference.
    • Access Mechanism: It uses a combination of Frequency Division Multiple Access (FDMA) and TDMA to allocate frequencies and time slots efficiently among users.
  3. HIPERLAN/3:
    • Frequency Band: Primarily designed for the 5 GHz band.
    • Data Rates: Supports very high data rates, potentially up to several hundreds of Mbps to Gbps.
    • Modulation: Incorporates advanced modulation techniques, including higher-order modulation schemes, MIMO (Multiple Input Multiple Output), and possibly beamforming for improved spectral efficiency and coverage.
    • Access Mechanism: Adopts advanced access mechanisms such as Dynamic Channel Allocation (DCA) and Quality of Service (QoS) mechanisms to ensure efficient and reliable communication for multimedia and real-time applications.

Key Features:

  • Quality of Service (QoS): HIPERLAN standards emphasize QoS to support multimedia applications with specific requirements for delay, jitter, and throughput.
  • Security: Provides robust security mechanisms, including encryption algorithms and authentication protocols, to ensure secure communication and protect against unauthorized access and attacks.
  • Interoperability: Although initially designed for specific frequency bands and applications, efforts have been made to ensure interoperability with other wireless LAN standards, such as IEEE 802.11, to facilitate integration and coexistence in heterogeneous network environments.

Applications:

  • Indoor and Outdoor Wireless LANs: HIPERLAN standards are suitable for various applications, including enterprise networks, public hotspots, residential broadband access, and outdoor metropolitan area networks (MANs).
  • Multimedia Streaming: Due to their high data rates and QoS capabilities, HIPERLAN networks are well-suited for streaming multimedia content, such as video conferencing, IPTV, online gaming, and other real-time applications requiring low latency and high throughput.

HIPERLAN standards represent a family of wireless communication standards developed to provide high-speed, reliable, and secure wireless connectivity for various applications, particularly in multimedia-rich environments. The evolution of HIPERLAN standards reflects advancements in wireless communication technologies, including modulation techniques, access mechanisms, and quality of service enhancements, to meet the growing demands of modern wireless networks.