物联网关键技术与标准——应对M2M业务挑战的4G网络增强技术-畅读网

　　　　

物联网关键技术与标准——应对M2M业务挑战的4G网络增强技术

作者：朱雪田

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mobi/epub/pdf/awz3

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计算机网络 >> 软硬件开发

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内容简介:

本书中首次介绍了这种新型通信技术具体的技术规范和国际通信组织制定的通信标准，同时针对M2M通信技术的引入在目前现有的cdma2000/LTE蜂窝通信网络中的所需要进行的技术改进以实现两者的完美融合。此外，本书给出了这些创新技术在实际网络中的验证结果，只有很高的指导意义。

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SHOW FULL COLUMNS FROM `ls_goods_category` [ RunTime:0.002257s ]
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SELECT `id`,`name`,`pid`,`image`,`level`,`is_show`,`is_recommend` FROM `ls_goods_category` WHERE `is_show` = 1 AND `del` = 0 AND `level` = 3 ORDER BY `sort` DESC [ RunTime:0.002541s ]
SHOW FULL COLUMNS FROM `ls_nav` [ RunTime:0.006072s ]
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SHOW FULL COLUMNS FROM `ls_friendly_link` [ RunTime:0.004244s ]
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SHOW FULL COLUMNS FROM `ls_goods` [ RunTime:0.016220s ]
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SHOW FULL COLUMNS FROM `ls_ad` [ RunTime:0.010852s ]
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SELECT `id`,`name` FROM `ls_goods_category` WHERE `id` = 35 LIMIT 1 [ RunTime:0.007320s ]
SELECT `a`.*,`ap`.`width`,`ap`.`height` FROM `ls_ad` `a` INNER JOIN `ls_ad_position` `ap` ON `a`.`pid`=`ap`.`id` WHERE `pid` = 11 AND `ap`.`client` = '2' AND `a`.`status` = '1' AND `a`.`del` = '0' AND `ap`.`status` = '1' AND `ap`.`del` = '0' ORDER BY `sort` DESC,`id` DESC [ RunTime:0.002126s ]
SELECT `a`.*,`ap`.`width`,`ap`.`height` FROM `ls_ad` `a` INNER JOIN `ls_ad_position` `ap` ON `a`.`pid`=`ap`.`id` WHERE `pid` = 14 AND `ap`.`client` = '2' AND `a`.`status` = '1' AND `a`.`del` = '0' AND `ap`.`status` = '1' AND `ap`.`del` = '0' ORDER BY `sort` DESC,`id` DESC [ RunTime:0.009811s ]
SELECT * FROM `ls_goods` WHERE `del` = 0 AND `status` = 1 AND `create_time` <= 1772050695 ORDER BY `create_time` DESC LIMIT 5 [ RunTime:1.656940s ]

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