UMTS/HSPA Module Series
UC15 MUX User Guide
UC15_MUX_User_Guide Confidential / Released 3 / 35
Contents
About the Document...................................................................................................................................2
Contents.......................................................................................................................................................3
Table Index...................................................................................................................................................5
Figure Index.................................................................................................................................................6
1Introduction..........................................................................................................................................7
2The Design Purpose of MUX...............................................................................................................8
3MUX AT Command...............................................................................................................................9
3.1. AT+CMUX Enable/disable MUX Control Channel..................................................................9
4The Multiplexer Protocol...................................................................................................................11
4.1. Frame Structure..................................................................................................................... 11
4.1.1. Flag Field........................................................................................................................11
4.1.2. Address Field ................................................................................................................. 11
4.1.2.1. EA.......................................................................................................................... 11
4.1.2.2. C/R.........................................................................................................................11
4.1.3. Control Field...................................................................................................................12
4.1.4. Length Field....................................................................................................................13
4.1.5. Information Field ............................................................................................................13
4.1.6. FCS Field .......................................................................................................................13
4.2. Frame Type............................................................................................................................14
4.2.1. SAMB.............................................................................................................................14
4.2.2. UA...................................................................................................................................14
4.2.3. DISC...............................................................................................................................14
4.2.4. DM..................................................................................................................................15
4.2.5. UIH.................................................................................................................................15
4.3. Control Channel.....................................................................................................................15
4.3.1. Message Format ............................................................................................................15
4.3.2. Message Type and Actions............................................................................................16
4.3.2.1. Power Saving Control (PSC).................................................................................16
4.3.2.2. Multiplexer Close Down.........................................................................................16
4.3.2.3. Flow Control on Command (FCon) .......................................................................17
4.3.2.4. Flow Control off Command (FCoff) .......................................................................17
4.3.2.5. Modem Status Command (MSC) ..........................................................................17
4.4. Procedure..............................................................................................................................20
4.4.1. MUX Establishment........................................................................................................20
4.4.2. MUX Release.................................................................................................................20
4.4.3. Data Transfer..................................................................................................................21
4.4.3.1. Information Data....................................................................................................21
4.4.3.2. Time-out Considerations .......................................................................................21
4.4.3.3. Flow Control...........................................................................................................22
