如何查看 GPRS的CS(coding scheme)以及EDGE的MCS（modulation and coding

在L3 消息的Assigment command 中，查找 IA Rest Octet

IEI

Information element

Type / Reference

Presence

Format

length

 

L2 Pseudo Length

L2 Pseudo Length
10.5.2.19

M

V

 1

 

RR management Protocol Discriminator

Protocol Discriminator
10.2

M

V

1/2

 

Skip Indicator

Skip Indicator
10.3.1

M

V

1/2

 

Immediate Assignment Message Type

Message Type
10.4

M

V

1

 

Page Mode

Page Mode
10.5.2.26

M

V

1/2

 

Dedicated mode or TBF

Dedicated mode or TBF
10.5.2.25b

M

V

1/2

 

Channel Description

Channel Description
10.5.2.5

C

V

3

 

Packet Channel Description

Packet Channel Description
10.5.2.25a

C

V

3

 

Request Reference

Request Reference
10.5.2.30

M

V

3

 

Timing Advance

Timing Advance
10.5.2.40

M

V

1

 

Mobile Allocation

Mobile Allocation
10.5.2.21

M

LV

1-9

7C

Starting Time

Starting Time
10.5.2.38

O

TV

3

 

IA Rest Octets

IA Rest Octets
10.5.2.16

M

V

0-11

 

IA Rest Octets 中查找 Packet UplinkAssignment

::=

      {    LL   <Compressed_Inter_RAT_HO_INFO_IND >

             | LH

                           {    00          < EGPRS Packet Uplink Assignment >

                                  | 01  < Multiple Blocks Packet DownlinkAssignment >

                                  |1          -- reserved for future use (however the value 7C for the firstoctet shall not be used)

                           }

             | HL < Length of frequency parameters : bit string (6) >

                           < Frequency Parameters, before time >

                           < Compressed_Inter_RAT_HO_INFO_IND >

             | HH{    00    <Packet Uplink Assignment >

                                  | 01  < Packet Downlink Assignment >

                                  |1          < Second Part Packet Assignment >

                           }

                           {    null        |L         -- Receiver compatible with earlier release

                                  | H                     -- Additions in Release 10

                                         < Implicit Reject CS : bit >

                                         < Implicit Reject PS : bit >

                           }

      }

      ;

 

GPRS的CS（codingscheme)

< Packet Uplink Assignment >::=

      {    1

                    < TFI_ASSIGNMENT : bit (5) >

                    < POLLING : bit >

                    0                        -- The value '1' was allocated in an earlier version of theprotocol and shall not be used.                      < USF: bit (3) >

                    < USF_GRANULARITY : bit >

                    { 0 | 1    < P0 : bit (4) >

                                  < PR_MODE : bit (1) > }

                    < CHANNEL_CODING_COMMAND : bit (2)>

                    < TLLI_BLOCK_CHANNEL_CODING : bit >

                    { 0 | 1    < ALPHA : bit (4) > }

                    < GAMMA : bit (5) >

                    { 0 | 1 < TIMING_ADVANCE_INDEX : bit (4) > }

                    { 0 | 1 < TBF_STARTING_TIME : bit (16) > }

             | 0   

 

EDGE的MCS

< RR Packet Uplink Assignment value part >::=
        <CHANNEL_CODING_COMMAND :bit (2) >

        <TLLI_BLOCK_CHANNEL_CODING : bit(1) >

        <Packet TimingAdvance : Packet Timing Advance IE >

        {       01             <Dynamic Allocation: Dynamic Allocation struct >

                  | 10   <reserved >              --The value '10' wasallocated in an earlier version of the protocol and shall not beused.

                  | 11   <reserved >              --The value '11' wasallocated in an earlier version of the protocol and shall not beused.

                  | 00 {     0    <Multiple TBFAllocation : Multiple TBF Allocation struct>

                                              | 1   < Extension> }

        }

        {     null                                                                                      --Receiver compatible withearlier release

        |                                                                                           --Additions forR99

                  { 0 | 1        <EGPRS_MCS_MODE : bit (4)>

                                    <RESEGMENT : bit(1) >

                                    <EGPRS Window Size: < EGPRS Window Size IE >> }

                  { 0 | 1        <Packet Extended TimingAdvance : bit (2) > }

                  {     null | 0 bit** = < no string >                        --Receiver compatible withearlier release

                  | 1                                                                                               --Additions forRel-7

                           { 0 | 1        <RLC_MODE : bit (1) >}       --This field may be presentin case of single TBF allocation

 

LOG举例：

  IMMEDIATE_ASSIGNMENT

     ded_mode_or_tbf

       tma = 0 (0x0)

       down_link = 0 (0x0)

       t_d = 1 (0x1)

     page_mode

       pm = 0 (0x0)

     packet_chan_desc

       Channel type = 1 (0x1)

       TN = 5 (0x5)

       TSC = 6 (0x6)

       const_0 = 0 (0x0)

       const_0 = 0 (0x0)

       spare_bit0 =0 (0x0)

       ARFCN = 720 (0x2d0)

     req_ref

       ra = 127 (0x7f)

       t1_prime = 14 (0xe)

       t3 = 35 (0x23)

       t2 = 13 (0xd)

     time_adv

       time_adv_val = 0 (0x0)

     mob_alloc

       mob_alloc_len = 0 (0x0)

     start_time_incl = 0 (0x0)

     ia_rest

       padding_bits_LH = 1 (0x1)

       const_00 = 0 (0x0)

       EGPRS Packet Uplink Assignment

         Extended RA = 26 (0x1a)

         access_technologies_request_present = 0 (0x0)

         const_1 = 1 (0x1)

         TFI_ASSIGNMENT = 15 (0xf)

         POLLING = 0 (0x0)

         const_0 = 0 (0x0)

         USF = 4 (0x4)

         USF_GRANULARITY = 1 (0x1)

         p0_present = 0 (0x0)

         EGPRS CHANNEL_CODING_COMMAND

           bits0 = 2 (0x2)//////// MCS=3

         TLLI_BLOCK_CHANNEL_CODING = 1 (0x1)

         bep_period2_present = 0 (0x0)

         RESEGMENT = 0 (0x0)

         EGPRS Window Size

           bits0 = 4 (0x4)

         alpha_present = 1 (0x1)

         ALPHA = 0 (0x0)

         GAMMA = 0 (0x0)

         timing_advance_index_present = 0 (0x0)

         tbf_starting_time_present = 0 (0x0)

         padding_bits_L = 0 (L)

       spare_padding0_count = 40 (0x28)

       spare_padding0 = 0x000000000

 

LOG中CS和MCS值对应的调制类型可参考：CS(coding scheme)和MCS(modulation andcoding scheme)

http://blog.sina.com.cn/s/blog_746b60460102uy6r.html