Processing of Reverse Traffic Channel Handoff Messages

2.6.6.2.5.2 Processing of Reverse Traffic Channel Handoff Messages

1. Pilot Strength Measurement Message or Extended Pilot Strength Measurement Message: The mobile station shall send an autonomous Pilot Strength Measurement Message in assured mode. The mobile station shall send this message containing measurements consistent with the event whenever any of the following events occur:

• P_REV_IN_USE_s is less than or equal to three or SOFT_SLOPE_s is equal to ‘000000’ and the strength of a Neighbor Set or Remaining Set pilot is found to be above T_ADD_s.

• P_REV_IN_USE_s is greater than three, SOFT_SLOPE_s is not equal to ‘000000’, and the strength PS, as specified in 2.6.6.2.2, of any Candidate Set pilot is found to satisfy the following inequality:





where the summation is performed over all pilots currently in the Active Set and a Pilot Strength Measurement Message carrying this information has not been sent since the last Extended Handoff Direction Message , General Handoff Direction Message or Universal Handoff Direction Message was received.

• P_REV_IN_USE_s is greater than three, SOFT_SLOPE_s is not equal to ‘000000’, and the strength PS, as specified in 2.6.6.2.2, of any Neighbor Set or Remaining Set pilot is found to satisfy the following inequality:

where the summation is performed over all pilots currently in the Active Set.

• P_REV_IN_USE_s is less than or equal to three or SOFT_SLOPE_s is equal to ‘000000’, the strength of a Candidate Set pilot exceeds the strength of an Active Set pilot by T_COMP_s  0.5 dB, and a Pilot Strength Measurement Message carrying this information has not been sent since the last Extended Handoff Direction Message, General Handoff Direction Message or Universal Handoff Direction Message was received.

• P_REV_IN_USE_s is greater than three, SOFT_SLOPE_s is not equal to ‘000000’, and the strength of a Candidate Set pilot exceeds the strength of an Active Set pilot by T_COMP_s  0.5 dB and satisfies the following inequality:



where the summation is performed over all pilots currently in the Active Set and a Pilot Strength Measurement Message carrying this information has not been sent since the last Extended Handoff Direction Message ,General Handoff Direction Message or Universal Handoff Direction Message was received.

• The handoff drop timer of an Active Set pilot has expired and a Pilot Strength Measurement Message carrying this information has not been sent since the last Extended Handoff Direction Message, General Handoff Direction Message, or Universal handoff Direction Message was received.

• If the handoff message (Extended Handoff Direction Message, General Handoff Direction Message or Universal Handoff Direction Message) specifies a soft handoff, the mobile station shall send the Handoff Completion Message within T_56m seconds after the action time of the received handoff message.

• If the handoff message (Extended Handoff Direction Message, General Handoff Direction Message or Universal Handoff Direction Message) specifies a hard handoff without return on failure (see 2.6.6.2.8.1), the mobile station shall send the Handoff Completion Message within T_73m seconds after the action time of the received handoff message.

• If the handoff message (General Handoff Direction Message or Universal Handoff Direction Message) specifies a hard handoff with return on failure (see 2.6.6.2.8.2), the mobile station shall send the Handoff Completion Message within T_56m seconds after mobile station declares the handoff to be successful (see 2.6.6.2.8.2).

• RETURN_IF_HANDOFF_FAIL_s is equal to ‘1’, and a handoff attempt is unsuccessful (see 2.6.6.2.8.2). In this case, the mobile station shall send a Candidate Frequency Search Report Message within T_56m seconds after completing a search of all pilots in the Candidate Frequency Search Set and resuming the use of the Serving Frequency Active Set (see 2.6.6.2.8.2.1).

• RETURN_IF_HANDOFF_FAIL_s is equal to ‘1’, an inter-frequency handoff attempt is unsuccessful (see 2.6.6.2.8.2), and PERIODIC_SEARCH_s is equal to ‘1’. In this case, the mobile station shall send a Candidate Frequency Search Report Message in a search period if the conditions specified in 2.6.6.2.8.3.2 are met.

• The mobile station receives a Candidate Frequency Search Request Message or a Candidate Frequency Search Control Message with SEARCH_TYPE set to ‘01’. If none of the conditions requiring the mobile station to send a Mobile Station Reject Order is true (see 2.6.6.2.5.1), the mobile station shall send a Candidate Frequency Search Report Message, as described in 2.6.6.2.8.3.1 and 2.6.6.2.10.1.

• The mobile station receives a Candidate Frequency Search Request Message or Candidate Frequency Search Control Message with SEARCH_TYPE set to ‘11’, SEARCH_MODE_s is equal to ‘0000’ and the Candidate Frequency Search Set is not empty. If none of the conditions requiring the mobile station to send a Mobile Station Reject Order is true (see 2.6.6.2.5.1), the mobile station shall send a Candidate Frequency Search Report Message in a search period if the conditions specified in 2.6.6.2.8.3.2 are met.

• The mobile station receives a Candidate Frequency Search Request Message or Candidate Frequency Search Control Message with SEARCH_TYPE set to ‘11’, SEARCH_MODE_s is equal to ‘0001’ and the Candidate Frequency Analog Search Set is not empty. If none of the conditions requiring the mobile station to send a Mobile Station Reject Order is true (see 2.6.6.2.5.1), the mobile station shall send a Candidate Frequency Search Report Message in a search period if the conditions specified in 2.6.6.2.10.2 are met.

5. Pilot Strength Measurement Mini Message: If the mobile station supports the Mobile Assisted Burst operation capability, the mobile station shall send this message while processing any Supplemental Channel, according to the following:

• 
  The mobile station shall transmit a Pilot Strength Measurement Mini Message for a pilot p in the Active Set on the r-dsch logical channel whenever all of the following conditions are true:
  

– ORDER_FLAG_s is equal to ‘1’.

– The pilot p in the Active Set has a received signal strength that is greater than the signal strength of another pilot in the Active Set by (PS_MIN_DELTA_s + 1) / 2 dB at the current time and has been for ORDER_INTERVAL_s successive 20 ms frame intervals.

• If PERIODIC_FLAG_s is equal to ‘1’, the mobile station shall transmit n = (min (NUM_PILOTS, the number of pilots in the Active Set)) Pilot Strength Measurements Mini Messages on the r-dsch logical channel for each of the n pilots in the Active Set with the largest signal strengths whenever the following condition is true:

• If THRESHOLD_FLAG_s is equal to ‘1’, the mobile station shall transmit a Pilot Strength Measurement Mini Message for pilot p on the r-dsch logical channel whenever all of the following conditions are true:

– Pilot p is in the Active Set for some SCH Physical Channel that is currently being processed by the mobile station.

– The signal strength of pilot p is greater than PS_CEILING_HIGH_s and the signal strength of pilot p was less than or equal to PS_CEILING_LOW_s at any time since the mobile station last sent a Pilot Strength Measurement Mini Message for pilot p; or the signal strength of pilot p is less than PS_FLOOR_LOW_s and the signal strength for pilot p was greater than or equal to PS_FLOOR_HIGH_s at any time since the last time that the mobile station sent a Pilot Strength Measurement Mini Message for pilot p.