Redline Communications Inc. AN100UA 用户手册

™

 

 

 

Doc. #70-00058-01-01 

Proprietary Redline Communications © 2007 

July 13, 2007 

Page 22 of 117

 

 

The base station is a frequency-specific system, with the frequency band defined by the 
modem unit. The use of the operating band must be in accordance with European 
Conference of Postal and Telecommunications Administrations (CEPT) 
Recommendation 14-03. 
The base station divides the available frequency band into channels. Allocation of 
channels during deployment is dependent on spectrum availability in the licensed FWA 
band and local licensing requirements and conditions. Channel selection allows planners 
to obtain the maximum geographic coverage, while avoiding frequency contention in 
adjacent sectors. 

 

Service flows are a key feature of the 802.16 standard.  
A service flow represents a unidirectional data flow. Transmitting bidirectional traffic 
requires that two service flows be defined: one for the uplink, and another for the 
downlink. These service flows can have different QoS settings. 
The base station allows multiple service flows to be configured for each subscriber in a 
sector. This allows service providers to offer different services, and segregate traffic 
flows having different QoS requirements. 
A service flow is partially characterized by the following attributes: 
1.  A 32-bit Service Flow ID (SFID) is assigned to all existing service flows. The SFID 

serves as the principal identifier for the Service Flow and has an associated direction. 

2.  A 16-bit Connection ID (CID) is associated with each active SFID (connection 

active).