WiMAX basic capability negotiation-SBC REQ,SBC RSP
This page describes fixed wimax basic capability negotiation outlined between BS and SS as per IEEE 802.16 MAC layer specifications. It mentions wimax SBC REQ and SBC RSP message formats.
The purpose here is that SS informs the BS of its basic capabilities. SBC REQ is transmitted by SS and received by BS. Upon receiving BS responds with SBC RSP message.
The procedure is that:
• After completion of ranging ,the BS will wait for SBC-REQ message transmitted by the SS
• If SBC-REQ message are not received within time set by timer T9 ,
the BS shall release and age out Basic and Primary Management CIDs allocated.
Timer T17 - Time allowed for SS to complete authorization and key exchange.
Timer T9 - registration timeout
WiMAX SBC REQ
Following table mentions typical example of wimax SBC REQ message values transmitted by wimax compliant SS.
| SBC REQ field | Example Value |
|---|---|
| Generic mac header(6 bytes) | 0x00, 0x40, 0x33, 0x00 ,0x08, 0xff |
| SBC REQ message type | 0x1a |
| BW Allocation support(TLV format ) | 0x01,0x01,0x00 |
| Capabilities for Construction & Transmission of MAC PDUs(TLV) | 0x04,0x01,0x03 |
| SS Transition Gap(TLV) | 0x02,0x02,0x00,0x00 |
| Max. Transmit Power(TLV) | 0x03,0x04,0x00,0x00,0x00,0x00 |
| Current Transmit Power(TLV) | 0x93,0x01,0x00 |
| OFDM SS FFT sizes (TLV) | 0x96,0x01,0x01 |
| OFDM SS demodulator(TLV) | 0x97,0x01,0x01 |
| OFDM SS modulator(TLV) | 0x98,0x01,0x01 |
| OFDM SS TC sublayer support(TLV) | 0x9a,0x01,0x00 |
| CRC(4 bytes) | 0x3a,0xb6,0x3e,0x60 |
WiMAX SBC RSP
Following table mentions typical example of wimax SBC RSP message values transmitted by Base station in response to received SBC REQ from SS.
| SBC RSP field | Example Value |
|---|---|
| Generic MAC Header(6 bytes) | 0x00, 0x40, 0x2a, 0x00, 0x08, 0x67 |
| SBC_RSP msg type | 0x1b |
| Bandwidth allocation support(TLV) | 0x01,0x01,0x00 |
| capablities for construction & transmission of MAC pdus(T) | 0x04,0x01,0x03 |
| subscriber transition gaps(T) | 0x02,0x02,0x32,0x32 |
| PKM flow control(T) | 0x0f,0x01,0x00 |
| Authorization policy support(T) | 0x10,0x01,0x00 |
| max. no of supported security associations(T) | 0x11,0x01,0x00 |
| OFDM SS FFT sizes(T) | 0x96,0x01,0x01 |
| OFDM SS Demodulator(T) | 0x97,0x01,0x01 |
| OFDM SS modulator(T) | 0x98,0x01,0x01 |
| OFDM SS TC sublayer support(T) | 0x9a,0x01,0x00 |
| CRC | 0x27,0x53,0x80,0xb6 |
What is Difference between
difference between FDM and OFDM
Difference between SC-FDMA and OFDM
Difference between SISO and MIMO
Difference between TDD and FDD
Difference between 802.11 standards viz.11-a,11-b,11-g and 11-n
Bluetooth vs zigbee
Bluetooth vs zigbee
wibro vs mobile wimax
Microcontroller vs microprocessor
FDMA vs TDMA vs CDMA
FDM vs TDM
CDMA vs GSM
OFDM vs OFDMA
wimax vs lte
Links to WiMAX MAC Layer resources
REG REQ and REG RSP
SBC REQ and SBC RSP
DSA REQ and DSA RSP
UCD,UIUC,DCD,DIUC
DLMAP and ULMAP
WiMAX Ranging Procedure
WiMAX Bandwidth Request procedure
WiMAX Network Entry Procedure
WiMAX CID vs SFID
WiMAX FCH header format
WiMAX TLV Format basics
WiMAX Timers
WiMAX Network Interface types
WiMAX QoS Classes
