查看完整版本: IS-95 规范

IS-95 规范

[sell=2]1[/sell]
IS-95 的规范

怎么只有2页啊！有没有详细一些的IS-95规范？

hoahoah

我喜欢，但我没钱

• Pilot and Sync Channel Processing - During Pilot and Sync Channel Processing, the 21
base station transmits the Pilot Channel and Sync Channel which the mobile station 22
uses to acquire and synchronize to the CDMA system while the mobile station is in 23
the Mobile Station Initialization State. 24
• Paging Channel Processing - During Paging Channel Processing, the base station 25
transmits the Paging Channel which the mobile station monitors to receive messages 26
while the mobile station is in the Mobile Station Idle State and the System Access 27
State. 28
• Access Channel Processing - During Access Channel Processing, the base station 29
monitors the Access Channel to receive messages which the mobile station sends 30
while the mobile station is in the System Access State. 31
• Traffic Channel Processing - During Traffic Channel Processing, the base station uses 32
the Forward and Reverse Traffic Channels to communicate with the mobile station 33
while the mobile station is in the Mobile Station Control on the Traffic Channel State. 34

6.6.6.1.2 Pilot Sets
Within section 6.6.6 the term pilot refers to a Pilot Channel identified by a pilot sequence
offset (see 7.1.3.2.1) and a frequency assignment (see 7.1.1.1). A pilot is associated with
the Forward Traffic Channels in the same Forward CDMA Channel. All pilots in a pilot set
have the same CDMA frequency assignment.
The mobile station searches for pilots on the current CDMA frequency assignment to detect
the presence of CDMA Channels and to measure their strengths. When the mobile station
detects a pilot of sufficient strength that is not associated with any of the Forward Traffic
Channels assigned to it, it sends a Pilot Strength Measurement Message to the base station.
The base station can then assign a Forward Traffic Channel associated with that pilot to
the mobile station and direct the mobile station to perform a handoff.
The pilot search parameters and the rules for Pilot Strength Measurement Message
transmission are expressed in terms of the following sets of pilots:
• Active Set: The pilots associated with the Forward Traffic Channels assigned to the
mobile station.
• Candidate Set: The pilots that are not currently in the Active Set but have been
received by the mobile station with sufficient strength to indicate that the associated
Forward Traffic Channels could be successfully demodulated.
• Neighbor Set: The pilots that are not currently in the Active Set or the Candidate Set
and are likely candidates for handoff.
• Remaining Set: The set of all possible pilots in the current system (integer multiples
of PILOT_INCs) on the current CDMA frequency assignment, excluding the pilots in
the Neighbor Set, the Candidate Set, and the Active Set.
6.6.6.2 Requirements
6.6.6.2.1 Pilot Search
For the pilot sets defined in 6.6.6.1.2, the base station sets the search window (range of PN
offsets) in which the mobile station is to search for usable multipath components (i.e.,
multipath components that the mobile station can use for demodulation of the associated
Forward Traffic Channel) of the pilots in the set.
Search performance criteria are defined in IS-98 “Recommended Minimum Performance
Standards for Dual-Mode Wideband Spread Spectrum Cellular Mobile Stations.”
This search shall be governed by the following:
• Active Set and Candidate Set: The search procedures for pilots in the Active Set and
Candidate Set shall be identical. The search window size22 for each pilot in the
Active Set and Candidate Set shall be the number of PN chips specified in Table
6.6.6.2.1-1 corresponding to SRCH_WIN_As. The mobile station should center the
search window for each pilot of the Active Set and Candidate Set around the earliest
arriving usable multipath component of the pilot. If the mobile station receives a
value greater than or equal to 13 for SRCH_WIN_Ar, it may store and use the value
13 in SRCH_WIN_As.
Neighbor Set: The search window size for each pilot in the Neighbor Set shall be the
number of PN chips specified in Table 6.6.6.2.1-1 corresponding to SRCH_WIN_Ns.
The mobile station should center the search window for each pilot in the Neighbor
Set around the pilot’s PN sequence offset using timing defined by the mobile station’s
time reference (see 6.1.5.1).
Remaining Set: The search window size for each pilot in the Remaining Set shall be
the number of PN chips specified in Table 6.6.6.2.1-1 corresponding to
SRCH_WIN_Rs. The mobile station should center the search window for each pilot in
the Remaining Set around the pilot’s PN sequence offset using timing defined by the
mobile station’s time reference (see 6.1.5.1). The mobile station should only search
for Remaining Set pilots whose pilot PN sequence offset indices are equal to integer
multiples of PILOT_INCs.

楼主！求您赠一份给我，好吗？这对我很重要。拜谢！ [email]ganlanhai@sohu.com[/email]

日，不是东西

妈的，两页的垃圾，害得我跑去银行开户，弄网上银行，搞了一整天，得个垃圾