lte的核心网设备包括以下哪些网元 LTE 的网络结构中有哪些网元？作用是什么？
lte\u7684\u6838\u5fc3\u7f51\u8bbe\u5907\u5305\u62ec\u4ee5\u4e0b\u54ea\u4e9b\u7f51\u5143mme\uff0csgw\uff0cpgw\uff0cpcrf\uff0chss\u7b49
LTE\u7f51\u7edc\u7ed3\u6784\u6709\u4ee5\u4e0b\u7f51\u5143\uff1a
1\u3001eNodeB\uff08\u7b80\u79f0\u4e3aeNB\uff09\u662fLTE\u7f51\u7edc\u4e2d\u7684\u65e0\u7ebf\u57fa\u7ad9\uff0c\u4e5f\u662fLTE\u65e0\u7ebf\u63a5\u5165\u7f51\u7684\u7f51\u5143\uff0c\u8d1f\u8d23\u7a7a\u4e2d\u63a5\u53e3\u76f8\u5173\u7684\u6240\u6709\u529f\u80fd\uff1a
\uff081\uff09\u65e0\u7ebf\u94fe\u8def\u7ef4\u62a4\u529f\u80fd\uff0c\u4fdd\u6301\u4e0e\u7ec8\u7aef\u95f4\u7684\u65e0\u7ebf\u94fe\u8def\uff0c\u540c\u65f6\u8d1f\u8d23\u65e0\u7ebf\u94fe\u8def\u6570\u636e\u548cIP\u6570\u636e\u4e4b\u95f4\u7684\u534f\u8bae\u8f6c\u6362\uff1b
\uff082\uff09\u65e0\u7ebf\u8d44\u6e90\u7ba1\u7406\u529f\u80fd\uff0c\u5305\u62ec\u65e0\u7ebf\u94fe\u8def\u7684\u5efa\u7acb\u548c\u91ca\u653e\u3001\u65e0\u7ebf\u8d44\u6e90\u7684\u8c03\u5ea6\u548c\u5206\u914d\u7b49\uff1b
\uff083\uff09\u90e8\u5206\u79fb\u52a8\u6027\u7ba1\u7406\u529f\u80fd\uff0c\u5305\u62ec\u914d\u7f6e\u7ec8\u7aef\u8fdb\u884c\u6d4b\u91cf\u3001\u8bc4\u4f30\u7ec8\u7aef\u65e0\u7ebf\u94fe\u8def\u8d28\u91cf\u3001\u51b3\u7b56\u7ec8\u7aef\u5728\u5c0f\u533a\u95f4\u7684\u5207\u6362\u7b49\u3002
2G/3G\u57fa\u7ad9\u53ea\u8d1f\u8d23\u4e86\u4e0e\u7ec8\u7aef\u65e0\u7ebf\u94fe\u8def\u7684\u8fde\u63a5\uff0c\u800c\u94fe\u8def\u7684\u5177\u4f53\u7ef4\u62a4\u5de5\u4f5c\uff08\u65e0\u7ebf\u8d44\u6e90\u7ba1\u7406\u3001\u4e0d\u7ecf\u8fc7\u6838\u5fc3\u7f51\u7684\u79fb\u52a8\u6027\u7ba1\u7406\u7b49\uff09\u90fd\u662f\u7531\u57fa\u7ad9\u7684\u4e0a\u4e00\u7ea7\u7ba1\u7406\u5b9e\u4f53\uff082G\u4e2d\u662fBSC\u30013G\u4e2d\u7684RNC\uff09\u5b8c\u6210\u7684\uff0c\u6b64\u5916\u65e0\u7ebf\u63a5\u5165\u7f51\u4e0e\u6838\u5fc3\u7f51\u7684\u6865\u6881\u529f\u80fd\u4e5f\u662f\u5728BSC\u6216RNC\u4e2d\u5b9e\u73b0\u7684\u3002
\u603b\u4e4b\uff0ceNB\u5927\u81f4\u76f8\u5f53\u4e8e2G\u4e2dBTS\u4e0eBSC\u7684\u7ed3\u5408\u4f53\uff0c\u62163G\u4e2dNodeB\u4e0eRNC\u7684\u7ed3\u5408\u4f53\u3002
2\u3001MME\uff08Mobility Management Entity\uff09\u662f3GPP\u534f\u8baeLTE\u63a5\u5165\u7f51\u7edc\u7684\u5173\u952e\u63a7\u5236\u8282\u70b9\uff0c\u5b83\u8d1f\u8d23\u7a7a\u95f2\u6a21\u5f0f\u7684UE(User Equipment)\u7684\u5b9a\u4f4d\uff0c\u4f20\u547c\u8fc7\u7a0b\uff0c\u5305\u62ec\u4e2d\u7ee7\uff0c\u7b80\u5355\u7684\u8bf4MME\u662f\u8d1f\u8d23\u4fe1\u4ee4\u5904\u7406\u90e8\u5206\u3002
\u5b83\u6d89\u53ca\u5230bearer\u6fc0\u6d3b/\u5173\u95ed\u8fc7\u7a0b\uff0c\u5e76\u4e14\u5f53\u4e00\u4e2aUE\u521d\u59cb\u5316\u5e76\u4e14\u8fde\u63a5\u5230\u65f6\u4e3a\u8fd9\u4e2aUE\u9009\u62e9\u4e00\u4e2aSGW(Serving GateWay)\u3002\u901a\u8fc7\u548cHSS\u4ea4\u4e92\u8ba4\u8bc1\u4e00\u4e2a\u7528\u6237\uff0c\u4e3a\u4e00\u4e2a\u7528\u6237\u5206\u914d\u4e00\u4e2a\u4e34\u65f6ID\u3002MME\u540c\u65f6\u652f\u6301\u5728\u6cd5\u5f8b\u8bb8\u53ef\u7684\u8303\u56f4\u5185\uff0c\u8fdb\u884c\u62e6\u622a\u3001\u76d1\u542c\u3002MME\u4e3a2G/3G\u63a5\u5165\u7f51\u7edc\u63d0\u4f9b\u4e86\u63a7\u5236\u51fd\u6570\u63a5\u53e3\uff0c\u901a\u8fc7S3\u63a5\u53e3\u3002\u4e3a\u6f2b\u6e38UEs\uff0c\u9762\u5411HSS\u540c\u6837\u63d0\u4f9b\u4e86S6a\u63a5\u53e3\u3002
3\u3001SGW\uff08Serving GateWay\uff0c\u670d\u52a1\u7f51\u5173\uff09\u662f\u79fb\u52a8\u901a\u4fe1\u7f51\u7edcEPC\u4e2d\u7684\u91cd\u8981\u7f51\u5143\u3002
EPC\u7f51\u7edc\u5b9e\u9645\u4e0a\u662f\u539f3G\u6838\u5fc3\u7f51PS\u57df\u7684\u6f14\u8fdb\u7248\u672c\uff0c\u800cSGW\u7684\u529f\u80fd\u548c\u4f5c\u7528\u4e0e\u539f3G\u6838\u5fc3\u7f51SGSN\u7f51\u5143\u7684\u7528\u6237\u9762\u76f8\u5f53\uff0c\u5373\u5728\u65b0\u7684EPC\u7f51\u7edc\u4e2d\uff0c\u63a7\u5236\u9762\u529f\u80fd\u548c\u5a92\u4f53\u9762\u529f\u80fd\u5206\u79bb\u66f4\u52a0\u5f7b\u5e95\u3002
4\u3001PGW\uff08PDN GateWay\uff0cPDN\u7f51\u5173\uff09\u662f\u79fb\u52a8\u901a\u4fe1\u7f51\u7edcEPC\u4e2d\u7684\u91cd\u8981\u7f51\u5143\u3002
EPC\u7f51\u7edc\u5b9e\u9645\u4e0a\u662f\u539f3G\u6838\u5fc3\u7f51PS\u57df\u7684\u6f14\u8fdb\u7248\u672c\uff0c\u800cPGW\u4e5f\u76f8\u5f53\u4e8e\u662f\u4e00\u4e2a\u6f14\u8fdb\u4e86\u7684GGSN\u7f51\u5143\uff0c\u5176\u529f\u80fd\u548c\u4f5c\u7528\u4e0e\u539fGGSN\u7f51\u5143\u76f8\u5f53\u3002
\u6269\u5c55\u8d44\u6599
\u968f\u7740\u6280\u672f\u7684\u6f14\u8fdb\u4e0e\u53d1\u5c55\uff0c3GPP\u76f8\u7ee7\u63d0\u51fa\u4e86TD-LTE\uff0cFDD-LTE\u7b49\u6280\u672f\u3002
1\u3001TD-LTE
TD-LTE\u662f\u4e00\u79cd\u65b0\u4e00\u4ee3\u5bbd\u5e26\u79fb\u52a8\u901a\u4fe1\u6280\u672f\uff0c\u662f\u6211\u56fd\u62e5\u6709\u81ea\u4e3b\u77e5\u8bc6\u4ea7\u6743\u7684TD-SCDMA\u7684\u540e\u7eed\u6f14\u8fdb\u6280\u672f\uff0c\u5728\u7ee7\u627f\u4e86TDD\u4f18\u70b9\u7684\u540c\u65f6\u53c8\u5f15\u5165\u4e86\u591a\u5929\u7ebfMIMO\u4e0e\u9891\u5206\u590d\u7528OFDM\u6280\u672f\u3002\u76f8\u6bd4\u4e8e3G\uff0cTD-LTE\u5728\u7cfb\u7edf\u6027\u80fd\u4e0a\u6709\u4e86\u8de8\u8d8a\u5f0f\u63d0\u9ad8\uff0c\u80fd\u591f\u4e3a\u7528\u6237\u63d0\u4f9b\u66f4\u52a0\u4e30\u5bcc\u591a\u5f69\u7684\u79fb\u52a8\u4e92\u8054\u7f51\u4e1a\u52a1\u3002
2\u3001FDD-LTE
FDD\uff08\u9891\u5206\u53cc\u5de5\uff09\u662f\u8be5\u6280\u672f\u652f\u63f4\u7684\u4e24\u79cd\u53cc\u5de5\u6a21\u5f0f\u4e4b\u4e00\uff0c\u5e94\u7528FDD\u5f0f\u7684LTE\u5373\u4e3aFDD-LTE\u3002
\u7531\u4e8e\u65e0\u7ebf\u6280\u672f\u7684\u5dee\u5f02\u4f7f\u7528\u9891\u6bb5\u7684\u4e0d\u540c\u4ee5\u53ca\u5404 \u4e2a\u5382\u5bb6\u7684\u5229\u76ca\u7b49\u56e0\u7d20\uff0cFDD-LTE\u7684\u6807\u51c6\u5316\u4e0e\u4ea7\u4e1a\u53d1\u5c55\u90fd\u9886\u5148\u4e8eTDD-LTE\u3002FDD\u6a21\u5f0f\u7684\u7279\u70b9\u662f\u5728\u5206\u79bb\uff08\u4e0a\u4e0b\u884c\u9891\u7387\u95f4\u9694190MHz\uff09\u7684\u4e24\u4e2a\u5bf9\u79f0\u9891\u7387\u4fe1\u9053\u4e0a\uff0c\u7cfb\u7edf\u8fdb\u884c\u63a5\u6536\u548c\u4f20\u9001\uff0c\u7528\u4fdd\u8bc1\u9891\u6bb5\u6765\u5206\u79bb\u63a5\u6536\u548c\u4f20\u9001\u4fe1\u9053\u3002
FDD\u6a21\u5f0f\u7684\u4f18\u70b9\u662f\u91c7\u7528\u5305\u4ea4\u6362\u7b49\u6280\u672f\uff0c\u53ef\u7a81\u7834\u4e8c\u4ee3\u53d1\u5c55\u7684\u74f6\u9888\uff0c\u5b9e\u73b0\u9ad8\u901f\u6570\u636e\u4e1a\u52a1\uff0c\u5e76\u53ef\u63d0\u9ad8\u9891\u8c31\u5229\u7528\u7387\uff0c\u589e\u52a0\u7cfb\u7edf\u5bb9\u91cf\u3002\u4f46FDD\u5fc5\u987b\u91c7\u7528\u6210\u5bf9\u7684\u9891\u7387\uff0c\u5373\u5728\u6bcf2 x 5MHz\u7684\u5e26\u5bbd\u5185\u63d0\u4f9b\u7b2c\u4e09\u4ee3\u4e1a\u52a1\u3002
\u8be5\u65b9\u5f0f\u5728\u652f\u6301\u5bf9\u79f0\u4e1a\u52a1\u65f6\uff0c\u80fd\u5145\u5206\u5229\u7528\u4e0a\u4e0b\u884c\u7684\u9891\u8c31\uff0c\u4f46\u5728\u975e\u5bf9\u79f0\u7684\u5206\u7ec4\u4ea4\u6362\uff08\u4e92\u8054\u7f51\uff09\u5de5\u4f5c\u65f6\uff0c\u9891\u8c31\u5229\u7528\u7387\u5219\u5927\u5927\u964d\u4f4e\uff08\u7531\u4e8e\u4f4e\u4e0a\u884c\u8d1f\u8f7d\uff0c\u9020\u6210\u9891\u8c31\u5229\u7528\u7387\u964d\u4f4e\u7ea640%\uff09\u3002 \u5728\u8fd9\u70b9\u4e0a\uff0cTDD\u6a21\u5f0f\u6709\u7740FDD\u65e0\u6cd5\u6bd4\u62df\u7684\u4f18\u52bf\u3002
绛旓細姝ゅ锛LTE鏍稿績缃 (EPC) 鏄敱涓浜涗富瑕佺綉鍏冪粍鎴愮殑锛屾瘮濡侻ME銆丼-GW銆丳-GW銆丠SS绛夈侻ME鏄Щ鍔ㄦх鐞嗚澶囷紝璐熻矗淇′护鍜屾帶鍒朵俊鎭殑澶勭悊銆係-GW鍜孭-GW鍒欐槸鏈嶅姟缃戝叧鍜孭DN缃戝叧锛屽垎鍒礋璐ｆ暟鎹殑璺敱鍜岃浆鍙戙傝孒SS鍒欐槸瀛樺偍鐢ㄦ埛绛剧害淇℃伅鐨勮澶銆傛荤殑鏉ヨ锛孡TE缃戠粶涓鍖呭惈浜嗗绉嶄笉鍚岀殑缃戝厓锛屽畠浠悇鑷壙鎷呯潃涓嶅悓鐨...
绛旓細鍥炵瓟锛氬鐢ㄦ埛鏉ヨ闇瑕佹敮鎸佽棰戠巼鐨勬墜鏈 瀵硅繍钀ュ晢鏉ヨ,闇瑕佸缓璁剧浉搴旂殑鍩虹珯璁惧鍜鏍稿績缃戣澶
绛旓細LTE缃戠粶鏋舵瀯 EPS鍖呮嫭鏍稿績缃EPC(EPC鍙堝寘鎷琈ME(淇′护澶勭悊閮ㄥ垎)銆丼-GW(鏁版嵁澶勭悊閮ㄥ垎)銆丳-GW)銆丒-UTRAN(鍙鍖呭惈鍩虹珯eNodeB涓涓綉鍏冿級銆
绛旓細鎵胯浇缃戯紝鐘瑰淇℃伅楂橀熷叕璺紝涓昏鐢盤TN鍜孫TN璁惧鏋勬垚锛屽浜5G鐨勯珮閫熸暟鎹紶杈撹嚦鍏抽噸瑕併傚畠鎵胯浇鐫鏁版嵁鐨勪紶杈撲娇鍛斤紝纭繚淇℃伅椤虹晠鏃犻樆銆鏍稿績缃锛岀綉缁滅殑澶ц剳 鏍稿績灞傛槸閫氫俊缃戠粶鐨勫績鑴忥紝璐熻矗澶勭悊鍜岃矾鐢辨捣閲忕殑鏁版嵁銆2G鏃朵唬鐨勭綉缁滅粨鏋勭浉瀵圭畝鍗曪紝闅忕潃GPRS鐨勫紩鍏ワ紝2.5G鏃朵唬鐨凱S鏍稿績缃戣癁鐢燂紝浣垮緱涓婄綉鎴愪负鍙兘銆傝4G LTE...
绛旓細鑰屼笉鍚孍noceB涔嬮棿鐨勯氳鍒欓噰鐢╔2鎺ュ彛锛屼富瑕佺敤浜庣Щ鍔ㄧ粓绔湪涓嶅悓鐨凟nodeB涔嬪墠鍒囨崲鏃讹紝蹇熷疄鐜扮敤鎴疯祫婧愮鐞嗕互鍙婃暟鎹縼绉汇鏍稿績缃EPC鏋舵瀯 鏍稿績缃慐PC閮ㄥ垎涓昏鍖呮嫭MME銆丼GW浠ュ強PGW涓変釜瀹炰綋銆侻ME鏄敱GPRS缃戠粶涓璖GSN鑺傜偣婕旇繘鑰屾潵鐨勩侻ME鏄LTE鎺ュ叆缃戠粶鐨勫叧閿帶鍒惰妭鐐癸紝 璐熻矗绌洪棽妯″紡涓嬬敤鎴璁惧鐨勮窡韪拰瀵诲懠鎺у埗锛屽叾涓...
绛旓細3銆丒nodeB鏄LTE绯荤粺涓殑鍩虹珯璁惧锛岃礋璐ｅ拰UE杩涜閫氫俊锛屽皢UE浼犺緭鐨勬暟鎹祦閲忚浆鍙戝埌鏍稿績缃涓侲nodeB鐨勫閲忓彇鍐充簬鍏剁‖浠堕厤缃拰杞欢璁捐锛鍖呮嫭澶╃嚎鏁伴噺銆佸鐞嗗櫒鎬ц兘銆佸瓨鍌ㄥ閲忕瓑鍥犵礌銆4銆佺瓟妗堬細enodeb鐨勫閲忔寚鐨勬槸鍏跺彲浠ユ敮鎸佺殑鏈澶х敤鎴锋暟鎴栬呮渶澶ф祦閲忔壙杞介噺銆傚叿浣撳閲忓ぇ灏忎細鍙楀埌纭欢鍜岃蒋浠剁殑闄愬埗锛屼緥濡侰PU銆...
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绛旓細濡3GPP鍒濇瑙勫垝鎵绀猴紝LTE鐨鏋舵瀯锛屼篃绉颁负E-UTRAN缁撴瀯锛屼富瑕佺敱eNodeB鍜屾帴鍏ョ綉鍏(aGW)鏋勬垚锛宎GW浣滀负杈圭晫鑺傜偣銆傝嫢瑙嗗叾涓鏍稿績缃鐨勪竴閮ㄥ垎锛屾帴鍏ョ綉鍒欎富瑕佺敱eNB灞傛瀯鎴愩俥NB闄や簡鍏峰浼犵粺NodeB鐨勫姛鑳斤紝杩樿礋璐ｅぇ閮ㄥ垎鍘熸湰鐢盧NC鎵ц鐨勪换鍔★紝鍖呮嫭鐗╃悊灞傘丮AC灞傘丷RC绠＄悊銆佽皟搴︺佹帴鍏ユ帶鍒躲佹壙杞芥帶鍒躲佺Щ鍔ㄦх鐞嗗拰Inter-...
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