【資料成文時(shí)間】：1999
【語(yǔ)言】：英語(yǔ)
【頁(yè)數(shù)】：94
【何人（公司）所著】：3GPP2
【文件格式】：PDF
【文件原名】：Speech Service Option Standard for Wideband Spread Spectrum Systems
【摘要或目錄】：PREFACE
2 These technical requirements form a standard for Service Option 1, a variable rate, two-way
3 speech service option. Service Option 1 conforms to the general requirements for service
4 options specified in TIA/EIA/IS-95 “Mobile Station-Base Station Compatibility Standard for
5 Dual-Mode Wideband Spread Spectrum Cellular System,” and in ANSI J-STD-008 "Personal
6 Station-Base Station Compatibility Requirements for 1.8 to 2.0 Ghz Code Division Multiple
7 Access (CDMA) Personal Communication Systems". A mobile station operating in wideband
8 spread spectrum (CDMA) mode conforming with TIA/EIA/IS-95 and this standard can ob9
tain speech service in any system conforming with these standards.
10 This standard does not address the quality or reliability of Service Option 1, nor does it
11 cover equipment performance or measurement procedures.
12
13 SECTION SUMMARY
14 1. General. This section defines the terms and numeric indicators used in this document.
15 2. Service Option 1: Variable Data Rate Two Way Voice. This section describes the
16 requirements for Service Option 1. Included in these requirements is the description of a
17 speech codec algorithm for variable rate, two-way voice.
18
19 NOTES
20 1. TIA/EIA/IS-125, “Recommended Minimum Performance Standard for Wideband
21 Spread Spectrum Digital Cellular System Speech Service Options,” provides
22 specifications and measurement methods for equipment designed to provide Service
23 Option 1.
24 2. “Base station” refers to the functions performed on the land side, which are
25 typically distributed among a cell, a sector of a cell, and a mobile or personal
26 communications switching center.
27 3. Section 2 uses the following verbal forms: “Shall” and “shall not” identify
28 requirements to be followed strictly to conform to the standard and from which no
29 deviation is permitted. “Should” and “should not” indicate that one of several
30 possibilities is recommended as particularly suitable, without mentioning or
31 excluding others; that a certain course of action is preferred but not necessarily
32 required; or that (in the negative form) a certain possibility or course of action is
33 discouraged but not prohibited. “May” and “need not” indicate a course of action
34 permissible within the limits of the standard. “Can” and “cannot” are used for
35 statements of possibility and capability, whether material, physical, or causal.
36 4. Footnotes appear at various points in this specification to elaborate and further
37 clarify items discussed in the body of the specification.
ANSI/TIA/EIA/-96-C
Publication Version
CONTENTS
ii
1 NOTES
2 5. Unless indicated otherwise, this document presents numbers in decimal form.
3 Binary numbers are distinguished in the text by the use of single quotation marks.
4 In some tables, binary values may appear without single quotation marks if table
5 notation clearly specifies that values are binary. The character ‘x’ is used to
6 represent a binary bit of unspecified value. For example ‘xxx00010’ represents any
7 8-bit binary value such that the least significant five bits equal ‘00010’.
8 Hexadecimal numbers (base 16) are distinguished in the text by use of the form
9 0xh…h(huán) where h…h(huán) represents a string of hexadecimal digits. For example, 0x2fa1
10 represents a number whose binary value is ‘10111110100001’ and whose decimal
11 value is 913. Note that the exact number of bits in the binary representation of a
12 hexadecimal number strictly depends on the implementation requirements for the
13 variable being represented.
14 6. The following conventions apply to mathematical expressions in this standard:
15 • x indicates the largest integer less than or equal to x:
1.1 = 1,
1.0 = 1.
16 • x indicates the smallest integer greater or equal to x: 1.1 = 2, 2.0 = 2.
17 • |x| indicates the absolute value of x: |-17|=17, |17|=17.
18 • ⊕ indicates exclusive OR.
19 • min (x, y) indicates the minimum of x and y.
20 • max (x, y) indicates the maximum of x and y.
21 • In figures, × indicates multiplication. In formulas within the text, multiplication
22 is implicit. For example, if h(n) and pL(n) are functions, then h(n) pL(n) = h(n) ×
23 pL(n).
24 • x mod y indicates the remainder after dividing x by y: x mod y = x - (y
x/y ).
25 • round(x) is traditional rounding: round(x) =
x + 0.5 .
• sign (x) =
1 x≥ 0
−1 x< 0




26 .
27 • Σ indicates summation. If the summation symbol specifies initial and terminal
28 values, and the initial value is greater than the terminal value, then the value of
29 the summation is 0. For example, if N=0, and if f(n) represents an arbitrary
30 function, then
n = 1
N
31 f(n) = 0.
32 • The bracket operator, [ ], isolates individual bits of a binary value. VAR[n]
33 refers to bit n of the binary representation of the value of the variable VAR,
34 such that VAR[0] is the least significant bit of VAR. The value of VAR[n] is
















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