After the Network Entry procedure has been completed, the SS engages in the Periodic Ranging procedure to assist in maintaining a reliable connection with the network.
The Periodic Ranging Procedure as seen in the MAC Message Window of the BS Emulator.
The SS sends this message to provide ranging detection to the BS for connection maintenance using information received in the Periodic Ranging Region. This message serves as a request by the SS for continued uplink resources from the BS. Information contained in this message includes:
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Frame Number (FN) |
The frame number at which the BS detected Periodic Ranging |
|
Detected Position (DP) |
The time at which the BS detected Periodic Ranging |
|
Ranging Code (RC) |
The Ranging Code value sent by the BS and then used by the SS to gain access to allocated uplink resources |
|
Frequency Offset (FO) |
The Frequency Offset detected between the SS and the BS during Periodic Ranging |
|
Ranging Matching Rate (RM) |
Indication of the quality of the received CDMA code |
|
Ranging Power (RP) |
The power information for the Periodic Ranging Code |
The E6651A Test Set can control the transmission of REP-REQ message. The message is sent from BS to SS and is used to get the SS's status information by the BS. Two control parameters are provided.
|
REP-REQ msg |
Enable/Disable Setting |
|
REP-REQ msg |
Transmission rate control : determines time interval between subsequent messages |
The E6651A provides the function to fill unallocated sub-channels and symbols of downlink frame with arbitrary data to support mobile WiMAX RCT test function. The "Full Occupied" setting is a toggle function.
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On |
Fill unallocated data region of downlink frame with arbitrary data bits |
|
Off |
Don't fill unallocated data region of downlink frame |
The E6651A can repeat UL MAP and DL MAP information in downlink frames. The repetition control function is provided by pressing Mode, BS Emulator, Settings, BSE Setting, and More to display the DLMAP Rep. and ULMAP Rep. softkeys. Pressing the Ul and DL Map keys cycles through [No], 2, 4, 6.
The E6651A provides two bandwidth allocation algorithms to allocate uplink data region for SS's data transmission. They are BW-REQ and UGS. The BW-REQ algorithm allocates uplink data region based on bandwidth request from SS. The UGS algorithm allocates uplink data region amount to "UL BW Alloc". "UL BW Alloc" is also set for use with the E6655A Lab Application.
Allocated number of symbols between uplink and downlink can be adjusted in the E6651A. You can adjust uplink and downlink symbol ratio.