专网协议频段介绍

1、频率结构1. 子载波：子载波是LTE时频结构中频率的基本结构单位，子载波的频率是基波频率的整数倍，LTE系统的基波频率为15KHZO2. 资源块(RB)：子载波是LTE系统频率的基本结构单位，不过由于子载波数量太多，比如在20M带宽下有1200个子载波，管理起来不方便。因此LTE系统把12个连续的子载波组合在一起，时长为一个时隙(0.5ms),构成资源块RB(resource block) o3. 调度块(SB) ：实际上，LTE系统为用户分配的资源并不是以RB为单位，而是以调度块 SB为单位。一个调度块由同一个子帧内相同频率范围的两个RB组成。4. 频点:专门划出的特定的频率范围，供指定无线

2、设备来使用，用来避免本系统或者其他系统的无线设备带来的干扰。有两个关键参数来描述:带宽和中心频率。带宽就是子载波占 用的频率范围，中心频率就是频点带宽上最高频率与最低频率的平均值。5. 频点编号LTE频点编号称为EARFCN ( E-UTRA Absolute Radio Frequency Channel Number),利用频点编号EARFCN可以得到频点的另外一个关键参数：中心频率频点的中心频率从起始频率开始，以0.1MHZ为步长，随着EARFCN而递增。在规范TS36.101中，给出了 EARFCN与频点中心频率的对应关系，单位MHZ。频点中心频率=(EARFCN-EARFCNo )

3、P.1+起始频率LTE频点计算公式下行频点计算公式:FDL = FDL_low + 0.1(NDL- NOffs-DL)其中FDL为该载频下行频点，FDLJow对应频段的最低下行频点，NDL为该载频下行频点号，NOffs-DL对应频段的最低下行频点号。对应关系表详见表5.7.3-1上行频点计算公式：FUL = FUL_low + 0.1(NULNOffs-UL)其中FUL为该载频上行频点，FUL low对应频段的最低上行频点，NUL为该载频上行频点号，NOffs-UL对应频段的最低上行频点号。对应关系表详见表5.7.3-1上下行频点号范围：0 - 65535.对应关系表详见表5.7.3-1如下

4、:E-UTRAOperati ngBandDownlinkUplinkF DLJowMHzFDL_HigMHzN Offs-DLRange of N dlFlILJowMHzFUL_HigMHzNOffs-ULRange of N ul1211000-59919201800018000-1859921930600600119918501860018600 -191993180512001200-194917101920019200 -199494211019501950 -239917101995019950 -20399586924002400 -26498242040020400 -206

5、49687526502650 -27498302065020650 -207497262027502750 -344925002075020750 -21449892534503450 -37998802145021450 -2179991844.938003800 -41491749.92180021800 -2214910211041504150 -474917102215022150 -22749111475.947504750 -49991427.92275022750 -229991272850005000 -51796982300023000 -231791374651805180

6、 -52797772318023180 -232791475852805280 -53797882328023280 -233791773457305730 -58497042373023730 -2384933190019203600036000 -36199190019203600036000 -3619934201020153620036200 -36349201020153620036200 -3634935185019103635036350 -36949185019103635036350 -3694936193019903695036950 -375491930199036950

7、36950 -3754937191019303755037550 -37749191019303755037550 -3774938257026203775037750 -38249257026203775037750 -3824939188019203825038250 -38649188019203825038250 -3864940230024003865038650 -39649230024003865038650 -3964941249626903965039650 -41589249626903965039650 -4158942340036004159041590 -435893

8、40036004159041590 -4358943360038004359043590 -45589360038004359043590 -45589447038034559045590 -465897038034559045590 -4658961143714676443664436 -64735143714676443664436 -6473562178518056473664736 -64935178518056473664736 -6493563180018306493664936 -65235180018306493664936 -6523564254525756523665236

9、 -65535254525756523665236 -65535NOTE: The channel numbers that designate carrier frequencies so close to the operating band edges that the carrier extends beyond the operating band edgeshall not be used. This implies that the first 7, 15, 25, 50, 75 and 100 channel numbers at the lower operating band edge and the last 6, 14, 24, 49,74 and 99 channel numbers at the upper operating band edge shall not be used for channel bandwidths of 1.4, 3, 5, 10, 15 and 20 MHz respective!y./*1437M-1467M TDD/*1785M-1805MTDD/*1800M-1830MTDD/*TDD私有7专网私有*/专网私有*/专网私有*/注：频段