HIPERLAN tutorial | HIPERLAN/1,HIPERLAN/2 Frame,PHY,MAC
The HIPERLAN tutorial covers HIPERLAN basics and types viz. HIPERLAN/1,HIPERLAN/2. It mentions HIPERLAN/2 frame structure and protocol stack.The Physical and MAC protocol layers are covered. Link to difference between HIPERLAN/1 and HIPERLAN/2 is also mentioned.
Introduction: The HIPERLAN is the short form of HIgh PERformance Radio LAN. It is defined by ETSI as alternative to IEEE 802.11. The specifications are specified or managed by BRAN (Broadband Radio Access Network). There are four set of standards as mentioned below.
➨HIPERLAN/1: radio LAN, 5.15 to 5.3 GHz , range: 50 meters, maximum rate of 23.5 Mbps, mobility less than 10 m/s
➨HIPERLAN/2: 5.1 to 5.3 GHz, short range (50 to 100m), greater than 20 Mbps, mobility less than 10 m/s.
➨HIPERACCESS: 5.1 GHz to 5.3 GHz, range of 5000 meters, data rate greater than 20 Mbps, stationary mode
➨HIPERLINK: 17.1 to 17.3 GHz, range: up to 150m, rate upto 155 Mbps, stationary mode
Refer HIPERLAN-1 Vs HIPERLAN-2 for more information.
HIPERLAN/2 Frame Structure
Fig-1: HIPERLAN/2 Frame
The basic frame structure in HIPERLAN/2 consists of broadcast, frame control, downlink, uplink and random access. Transmission format in HIPERLAN/2 is burst which consists of preamble and data fields (i.e. PDUs).
HIPERLAN/2 Protocol Stack-PHY layer, MAC layer
Fig-2: HIPERLAN-1 and HIPERLAN-2 protocol stack
The figure-2 depicts HIPERLAN-1 protocol stack layers. As shown it consists of two layers viz. physical layer and data link layer. Data link layer consists of LLC (Logical Link Control) and MAC (Medium Access Control). There is another sublayer which exists between PHY and MAC. It is known as CAC (Channel Access and Control Layer).
The figure-2 also depicts HIPERLAN-2 protocol layers viz. Physical Layer, DLC layer and Convergence layer. DLC (Data Link Control) layer is further sub divided into 3 layers viz. MAC, LLC and RLC layers.
PHY layer supports following six modulation/coding rates.
| Modulation-code rate | Data rate (Mbps) |
|---|---|
| BPSK-1/2 | 6 |
| BPSK-3/4 | 9 |
| QPSK-1/2 | 12 |
| QPSK-3/4 | 18 |
| 16QAM-9/16 | 27 |
| 16QAM-3/4 | 36 |
| 64QAM-3/4 | 54 |
11ac and 11af tutorial Links
WLAN 802.11ac tutorial
WLAN 802.11ad tutorial
WLAN 802.11af tutorial
WLAN MAC frames Links
WLAN Association Request and response frame
WLAN authentication Request and deauthentication frame
WLAN beacon frame
WLAN passive vs active scanning frame
WLAN Probe Request and response frame
WLAN reassociation Request and response frame
WLAN RTS and CTS frame
WLAN RELATED LINKS
WLAN tutorial About wlan 802.11 standards 11a WLAN PHY 11b PHY 11n PHY WLAN 802.11ac WLAN 802.11ad 11a vs 11b vs 11g vs 11n WLAN routers WLAN providers WLAN DCF vs PCF Adhoc vs Infrastructure WLAN 802.11 channels WLAN Frame Structure IR vs SS vs RF WLAN Terminology WLAN vs WiMAX