Quectel GSM Multiplexer Protocol Application Notes

需积分: 16 2 下载量 100 浏览量 更新于2024-07-27 收藏 1.11MB PDF 举报
"GSM_MUX_AN_V1" 本文档详细介绍了Quectel公司的GSM复用协议,即GSM_MUX_AN_V1,旨在提供如何利用该协议的技术细节。Quectel是一家专注于蜂窝通信模块的公司,其提供的GSM Multiplexer协议是用于提高通信效率和优化数据传输的一种技术。 GSM(Global System for Mobile Communications)是一种广泛使用的全球性移动通信标准,而MUX(Multiplexer)在通信领域中通常指的是复用器,它能够将多个信号合并到一个信道进行传输,或者将一个信号分解成多个信号。在GSM系统中,复用协议可能涉及到将不同类型的通信数据(如语音、短信、数据等)在共享的物理信道上进行有效分配和同步。 GSM_MUX_AN_V1.00是这份应用笔记的版本号,发布日期为2009年6月27日,状态为“Release”,意味着这是正式公开的技术文档。文档控制ID表明了其身份,即GSM_MUX_AN_V1.00。这个版本的协议可能包含了Quectel与客户共同商定的具体需求,但Quectel并未对额外的相关信息进行独立搜索,包括可能在客户手中已有的信息。因此,使用此产品设计的系统验证仍由客户或系统集成商负责。 文档中的“General Notes”部分强调,Quectel提供这些信息作为对客户的增值服务,以支持基于Quectel设计的产品的应用和工程努力。然而,所有的规格说明都有可能随时间变化,这提醒读者应保持对最新版本文档的关注。此外,文档中包含的专有技术信息是Quectel Limited的财产,未经授权,禁止复制、分发或使用其中的内容。 GSM_MUX_AN_V1协议的详细内容可能涵盖了以下几个方面: 1. **协议结构**:描述了GSM复用协议的基本框架,包括协议头、数据包格式和控制信息。 2. **复用和解复用过程**:解释了如何在发送端将多种数据流复用到一个信道,以及在接收端如何正确地解复用这些数据。 3. **错误检测与纠正**:可能包含用于确保数据传输完整性的校验机制,如CRC(循环冗余校验)或其他纠错编码。 4. **流量控制**:讨论了如何通过协议来管理数据传输速率,避免网络拥塞。 5. **同步机制**:可能涉及如何在通信双方之间保持同步,尤其是在不同网络环境下的适应性。 6. **兼容性和互操作性**:可能提到了与其他GSM设备或系统的兼容性问题及其解决方案。 7. **应用示例**:可能提供了实际应用场景的案例,帮助开发者理解和实施该协议。 了解并掌握GSM_MUX_AN_V1协议对于开发和优化基于GSM的通信系统至关重要,特别是对于那些需要高效利用信道资源和处理复杂数据流的项目。在实际应用中,结合Quectel提供的技术文档和开发工具,开发者可以更有效地实现设备间的通信,提升系统性能。

[ERROR] [1686470934.428942562]: Failed to load nodelet [/vesc/high_level/ackermann_cmd_mux] of type [ackermann_cmd_mux/AckermannCmdMuxNodelet] even after refreshing the cache: Could not find library corresponding to plugin ackermann_cmd_mux/AckermannCmdMuxNodelet. Make sure the plugin description XML file has the correct name of the library and that the library actually exists. [ERROR] [1686470934.428971220]: The error before refreshing the cache was: Could not find library corresponding to plugin ackermann_cmd_mux/AckermannCmdMuxNodelet. Make sure the plugin description XML file has the correct name of the library and that the library actually exists. [FATAL] [1686470934.431196976]: Failed to load nodelet '/vesc/high_level/ackermann_cmd_mux` of type `ackermann_cmd_mux/AckermannCmdMuxNodelet` to manager `ackermann_cmd_mux_nodelet_manager' [ERROR] [1686470934.443739149]: Failed to load nodelet [/vesc/low_level/ackermann_cmd_mux] of type [ackermann_cmd_mux/AckermannCmdMuxNodelet] even after refreshing the cache: Could not find library corresponding to plugin ackermann_cmd_mux/AckermannCmdMuxNodelet. Make sure the plugin description XML file has the correct name of the library and that the library actually exists. [ERROR] [1686470934.443788076]: The error before refreshing the cache was: Could not find library corresponding to plugin ackermann_cmd_mux/AckermannCmdMuxNodelet. Make sure the plugin description XML file has the correct name of the library and that the library actually exists. [FATAL] [1686470934.443989800]: Failed to load nodelet '/vesc/low_level/ackermann_cmd_mux` of type `ackermann_cmd_mux/AckermannCmdMuxNodelet` to manager `ackermann_cmd_mux_nodelet_manager' [INFO] [1686470934.604266, 0.000000]: Waiting for /clock to be available... [vesc/high_level/ackermann_cmd_mux-15] process has died [pid 14355, exit code 255, cmd /opt/ros/noetic/lib/nodelet/nodelet load ackermann_cmd_mux/AckermannCmdMuxNodelet ackermann_cmd_mux_nodelet_manager __name:=ackermann_cmd_mux __log:=/home/wangyize/.ros/log/34ccd5d4-082f-11ee-88c4-d10631277e54/vesc-high_level-ackermann_cmd_mux-15.log]. log file: /home/wangyize/.ros/log/34ccd5d4-082f-11ee-88c4-d10631277e54/vesc-high_level-ackermann_cmd_mux-15*.log [vesc/low_level/ackermann_cmd_mux-17] process has died [pid 14362, exit code 255, cmd /opt/ros/noetic/lib/nodelet/nodelet load ackermann_cmd_mux/AckermannCmdMuxNodelet ackermann_cmd_mux_nodelet_manager __name:=ackermann_cmd_mux __log:=/home/wangyize/.ros/log/34ccd5d4-082f-11ee-88c4-d10631277e54/vesc-low_level-ackermann_cmd_mux-17.log]. log file: /home/wangyize/.ros/log/34ccd5d4-082f-11ee-88c4-d10631277e54/vesc-low_level-ackermann_cmd_mux-17*.log

2023-06-12 上传

[ERROR] [1686540341.656331436]: Failed to load nodelet [/vesc/high_level/ackermann_cmd_mux] of type [ackermann_cmd_mux/AckermannCmdMuxNodelet] even after refreshing the cache: Could not find library corresponding to plugin ackermann_cmd_mux/AckermannCmdMuxNodelet. Make sure the plugin description XML file has the correct name of the library and that the library actually exists. [ERROR] [1686540341.656401879]: The error before refreshing the cache was: Could not find library corresponding to plugin ackermann_cmd_mux/AckermannCmdMuxNodelet. Make sure the plugin description XML file has the correct name of the library and that the library actually exists. [FATAL] [1686540341.656599888]: Failed to load nodelet '/vesc/high_level/ackermann_cmd_mux` of type `ackermann_cmd_mux/AckermannCmdMuxNodelet` to manager `ackermann_cmd_mux_nodelet_manager' [ERROR] [1686540341.658449305]: Failed to load nodelet [/vesc/low_level/ackermann_cmd_mux] of type [ackermann_cmd_mux/AckermannCmdMuxNodelet] even after refreshing the cache: Could not find library corresponding to plugin ackermann_cmd_mux/AckermannCmdMuxNodelet. Make sure the plugin description XML file has the correct name of the library and that the library actually exists. [ERROR] [1686540341.658478764]: The error before refreshing the cache was: Could not find library corresponding to plugin ackermann_cmd_mux/AckermannCmdMuxNodelet. Make sure the plugin description XML file has the correct name of the library and that the library actually exists. [FATAL] [1686540341.658664845]: Failed to load nodelet '/vesc/low_level/ackermann_cmd_mux` of type `ackermann_cmd_mux/AckermannCmdMuxNodelet` to manager `ackermann_cmd_mux_nodelet_manager'

2023-06-13 上传