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CQI
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• ÔõÑùÓö¦Á¦Ç°Ì¨³öCQIÖ¸±ê 2011-09-03
• ¹ØÓÚÖÐÐËÉ豸CQIÖ¸±êµÄͳ¼Æ·½·¨ 2011-09-01
• WÖÐÊý¾ÝÒµÎñµÄCQI±íʾʲô°¡ 2011-08-02
• ÓÐûÓйØÓÚCQIÈÝ´íµÄËã·¨ 2011-01-29
• ¹ØÓÚWCDMAÖеÄCQIµÄÏà¹ØÎÊÌâ 2011-01-11
• ¹ØÓÚTDSCDMA CQIÎÊÌâ 2010-11-10
• ÔÚTDÖУ¬×öHÒµÎñʱ£¬CQIµÄ³õʼֵÊǶàÉÙ£¿CQIµÄ·¶Î§ÊǶàÉÙ£¿ 2010-10-10
• TD-SCDMAµÄCQIËã·¨ºÍTFRCËã·¨ÔÚÄÄÐ޸ģ¿Çë½Ì¸ßÊÖ£¡ 2010-09-29
• ¹ØÓÚÖÐÐËÉ豸CQIÖ¸±êµÄͳ¼Æ·½·¨ 2011-09-01
• WÖÐÊý¾ÝÒµÎñµÄCQI±íʾʲô°¡ 2011-08-02
• ÓÐûÓйØÓÚCQIÈÝ´íµÄËã·¨ 2011-01-29
• ¹ØÓÚWCDMAÖеÄCQIµÄÏà¹ØÎÊÌâ 2011-01-11
• ¹ØÓÚTDSCDMA CQIÎÊÌâ 2010-11-10
• ÔÚTDÖУ¬×öHÒµÎñʱ£¬CQIµÄ³õʼֵÊǶàÉÙ£¿CQIµÄ·¶Î§ÊǶàÉÙ£¿ 2010-10-10
• TD-SCDMAµÄCQIËã·¨ºÍTFRCËã·¨ÔÚÄÄÐ޸ģ¿Çë½Ì¸ßÊÖ£¡ 2010-09-29
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RI£¨Rank Indication£©£»RANKָʾ¡£RANKΪMIMO·½°¸ÖÐÌìÏß¾ØÕóÖеÄÖÈ¡£±íʾN¸ö²¢ÐеÄÓÐЧµÄÊý¾ÝÁ÷¡£
PMI(Pre-coding matrix Indication) Ô¤±àÂë¾ØÕóָʾ¡£Ô¤±àÂëÊǶàÌìÏßϵͳÖеÄÒ»ÖÖ×ÔÊÊÓ¦¼¼Êõ£¬¼´¸ù¾ÝÐŵÀµÄ״̬ÐÅÏ¢£¨CSI£©£¬ÔÚ·¢Éä¶Ë×ÔÊÊÓ¦µÄ¸Ä±äÔ¤±àÂë¾ØÕó£¬Æ𵽸ıäÐźžÀúµÄÐŵÀµÄ×÷Óá£ÔÚÊÕ·¢Á½¶Ë¾ù´æ´¢Ò»Ì×°üº¬Èô¸É¸öÔ¤±àÂë¾ØÕóµÄÂëÊ飬ÕâÑù½ÓÊÕ»ú¿ÉÒÔ¸ù¾Ý¹À¼Æ³öµÄÐŵÀ¾ØÕóºÍijһ׼ÔòÑ¡ÔñÆäÖÐÒ»¸öÔ¤±àÂë¾ØÕ󣬲¢½«ÆäË÷ÒýÖµºÍÁ¿»¯ºóµÄÐŵÀ״̬ÐÅÏ¢·´À¡¸ø·¢ËͶˣ»ÔÚÏÂÒ»¸öʱ¿Ì£¬·¢ËͶ˲ÉÓÃеÄÔ¤±àÂë¾ØÕ󣬲¢¸ù¾Ý·´À¡»ØµÄÐŵÀ״̬Á¿»¯ÐÅϢΪÂë×ÖÈ·¶¨±àÂëºÍµ÷ÖÆ·½Ê½¡£
CQI£¨Channel Quality Indicator£©ÐŵÀÖÊÁ¿Ö¸Ê¾¡£Ö¸Âú×ãijÖÖÐÔÄÜ£¨10%µÄBLER£©Ê±¶ÔÓ¦Ò»¸öÐŵÀÖÊÁ¿µÄË÷ÒýÖµ(°üÀ¨µ±Ç°µÄµ÷ÖÆ·½Ê½£¬±àÂëËÙÂʼ°Ð§ÂʵÈÐÅÏ¢)£¬CQIË÷ÒýÔ½´ó£¬±àÂëЧÂÊÔ½¸ß¡£ºÍHSDPAÖÐCQIµÄº¬ÒåÊÇÒ»ÑùµÄ£¬Ö»²»¹ý£¬ÔÚLTEÖУ¬CQIÊÇ4bit£¬¶øÔÚHSDPAÇé¿öÏ£¬CQIÊÇ5bit¡£
PMI(Pre-coding matrix Indication) Ô¤±àÂë¾ØÕóָʾ¡£Ô¤±àÂëÊǶàÌìÏßϵͳÖеÄÒ»ÖÖ×ÔÊÊÓ¦¼¼Êõ£¬¼´¸ù¾ÝÐŵÀµÄ״̬ÐÅÏ¢£¨CSI£©£¬ÔÚ·¢Éä¶Ë×ÔÊÊÓ¦µÄ¸Ä±äÔ¤±àÂë¾ØÕó£¬Æ𵽸ıäÐźžÀúµÄÐŵÀµÄ×÷Óá£ÔÚÊÕ·¢Á½¶Ë¾ù´æ´¢Ò»Ì×°üº¬Èô¸É¸öÔ¤±àÂë¾ØÕóµÄÂëÊ飬ÕâÑù½ÓÊÕ»ú¿ÉÒÔ¸ù¾Ý¹À¼Æ³öµÄÐŵÀ¾ØÕóºÍijһ׼ÔòÑ¡ÔñÆäÖÐÒ»¸öÔ¤±àÂë¾ØÕ󣬲¢½«ÆäË÷ÒýÖµºÍÁ¿»¯ºóµÄÐŵÀ״̬ÐÅÏ¢·´À¡¸ø·¢ËͶˣ»ÔÚÏÂÒ»¸öʱ¿Ì£¬·¢ËͶ˲ÉÓÃеÄÔ¤±àÂë¾ØÕ󣬲¢¸ù¾Ý·´À¡»ØµÄÐŵÀ״̬Á¿»¯ÐÅϢΪÂë×ÖÈ·¶¨±àÂëºÍµ÷ÖÆ·½Ê½¡£
CQI£¨Channel Quality Indicator£©ÐŵÀÖÊÁ¿Ö¸Ê¾¡£Ö¸Âú×ãijÖÖÐÔÄÜ£¨10%µÄBLER£©Ê±¶ÔÓ¦Ò»¸öÐŵÀÖÊÁ¿µÄË÷ÒýÖµ(°üÀ¨µ±Ç°µÄµ÷ÖÆ·½Ê½£¬±àÂëËÙÂʼ°Ð§ÂʵÈÐÅÏ¢)£¬CQIË÷ÒýÔ½´ó£¬±àÂëЧÂÊÔ½¸ß¡£ºÍHSDPAÖÐCQIµÄº¬ÒåÊÇÒ»ÑùµÄ£¬Ö»²»¹ý£¬ÔÚLTEÖУ¬CQIÊÇ4bit£¬¶øÔÚHSDPAÇé¿öÏ£¬CQIÊÇ5bit¡£
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1. LTE ÖеÄCQI£¬PMI£¬RIÉϱ¨»úÖÆ
LTEÖÐÖ§³ÖÁ½ÖÖÐÎʽµÄCQI£¬PMIºÍRIÉϱ¨£ºÖÜÆÚÐԵĺͷÇÖÜÆÚÐÔµÄÉϱ¨¡£ÖÜÆÚÐÔµÄCQIÉϱ¨Í¨³£ÊÇͨ¹ýPUCCHÀ´½øÐеġ£Èç¹ûUEÔÚ·¢ËÍÖÜÆÚÐÔCQIµÄ×ÓÖ¡ÉÏ£¬Í¬Ê±±»µ÷¶ÈÓÐÊý¾ÝÐèÒª·¢ËÍ£¬ÄÇô£¬ÖÜÆÚÐÔµÄCQIÉϱ¨½«Í¨¹ýPUSCHÀ´½øÐС£´Ëʱ£¬UE½«ÔÚPUSCHÖвÉÓúÍPUCCHÖÐͬÑùµÄCQI/PMI/RI¸ñʽ£¬¶øÏàÓ¦µÄPUCCHÉϵÄCQIÉϱ¨×ÊÔ´½«»áÏÐÖò»Óá¾1¡¿¡£ eNodeB»¹¿ÉÒÔ´¥·¢UE½øÐзÇÖÜÆÚÐÔµÄÉϱ¨¡£·ÇÖÜÆÚÐÔµÄÉϱ¨ÊÇͨ¹ýPUSCHÀ´½øÐеġ£ÕâЩÉϱ¨¿ÉÒÔÔÚPUSCHÉϵ¥¶ÀµØ»òÕߺÍÆäËûÊý¾ÝÒ»Æð½øÐз¢ËÍ¡£
ÔÚÖÜÆÚÐÔCQIÉϱ¨ºÍ·ÇÖÜÆÚÐÔCQIÉϱ¨×Ó֡ͬʱ´æÔÚµÄ×ÓÖ¡£¬UE½«»áÖ»Éϱ¨·ÇÖÜÆÚÐÔµÄCQIÉϱ¨¶ø¶ªÆúÖÜÆÚÐÔµÄÉϱ¨¡£
CQIÉϱ¨µÄÁ£¶ÈÓÐÈý¸öµÈ¼¶£º¿í´ø£¬UEÑ¡ÔñµÄ×Ó´øºÍÉϲãÅäÖõÄ×Ó´ø¡£
¿í´øCQIÉϱ¨ÊÇÖ¸UEÕë¶ÔÕû¸öϵͳ´ø¿íÉϱ¨Ò»¸öCQI¡£CQIµÄÈ¡ÖµÈçÏÂͼËùʾ£º
Table 7.2.3-1: 4-bit CQI Table
CQI index |
modulation |
code rate x 1024 |
efficiency |
0 |
out of range | ||
1 |
QPSK |
78 |
0.1523 |
2 |
QPSK |
120 |
0.2344 |
3 |
QPSK |
193 |
0.3770 |
4 |
QPSK |
308 |
0.6016 |
5 |
QPSK |
449 |
0.8770 |
6 |
QPSK |
602 |
1.1758 |
7 |
16QAM |
378 |
1.4766 |
8 |
16QAM |
490 |
1.9141 |
9 |
16QAM |
616 |
2.4063 |
10 |
64QAM |
466 |
2.7305 |
11 |
64QAM |
567 |
3.3223 |
12 |
64QAM |
666 |
3.9023 |
13 |
64QAM |
772 |
4.5234 |
14 |
64QAM |
873 |
5.1152 |
15 |
64QAM |
948 |
5.5547 |
ÖµµÃ×¢ÒâµÄÊÇ£¬ÀàËÆÓÚHSDPA£¬CQIµÄѡȡ׼ÔòÊÇUE½ÓÊÕµ½µÄ´«Êä¿éµÄÎóÂëÂʲ»³¬¹ý10£¥¡£Òò´Ë£¬UEÉϱ¨µÄCQI²»½öÓëÏÂÐвο¼ÐźŵÄSINRÓйأ¬»¹ÓëUE½ÓÊÕ»úµÄÁéÃô¶ÈÓйء¾2¡¿¡£
ÉϲãÅäÖõÄ×Ó´øÉϱ¨ÊÇÖ¸Õë¶ÔÕû¸öϵͳ´ø¿í£¬UEÉϱ¨Ò»¸ö¿í´øCQI¡£³ý´ËÖ®Í⣬UE»¹¶Ôÿ¸ö×Ó´øÉϱ¨Ò»¸öCQI¡£ÔÚÉϲãÅäÖõÄ×Ó´øÉϱ¨ÖУ¬Ã¿¸ö×Ó´øµÄ´ø¿íΪK¸öÁ¬ÐøµÄÎïÀí×ÊÔ´¿é£¬KµÄÈ¡Öµ´óСÓëϵͳµÄ´ø¿íÓйء£×Ó´øµÄÊýĿΪ £¬¸²¸ÇÁËÕû¸öϵͳµÄ´ø¿í¡£ÆäÖРΪÏÂÐеÄÎïÀí×ÊÔ´¿éµÄÊýÄ¿¡£×îºóÒ»¸ö×Ó´øµÄ×ÊÔ´¿éÊýÄ¿¿ÉÄÜСÓÚK¡£
Table 7.2.1-3: Subband Size (k) vs. System Bandwidth
System Bandwidth |
Subband Size |
|
(k) |
6 - 7 |
NA |
8 - 10 |
4 |
11 - 26 |
4 |
27 - 63 |
6 |
64 - 110 |
8 |
¶ÔÓÚÿ¸ö×Ó´ø£¬Éϱ¨2¸öBitµÄCQI±àºÅ£¬×Ó´øµÄCQI±àºÅÓë×Ó´øCQIÏà¶ÔÓÚ¿í´øCQIµÄÆ«ÒÆÖµÓйأ¬ÈçÏÂËùʾ£º
Subband differential CQI offset level = subband CQI index ¨C wideband CQI index
Table 7.2.1-2: Mapping subband differential CQI value to offset level
Subband differential CQI value |
Offset level |
0 |
0 |
1 |
1 |
2 |
³2 |
3 |
£-1 |
¶ÔÓÚUEÑ¡ÔñµÄ×Ó´øÉϱ¨£¬ÔÚÖÜÆÚÐÔÉϱ¨ºÍ·ÇÖÜÆÚÐÔÉϱ¨ÖоßÓв»Í¬µÄÐÎʽ£¬ÏÂÃ潫»áÏêϸÐðÊö¡£
LTEÖеÄCQIÉϱ¨£¬»¹ÓëUEµÄ´«ÊäģʽÓйء£LTEÖУ¬¶¨ÒåÁË°ËÖÖ²»Í¬µÄ´«Êäģʽ£¬¶ÔÓ¦ÏàÓ¦µÄ¶àÌìÏß¼¼Êõ¡£²»Í¬µÄ´«ÊäģʽÏ£¬Éϱ¨µÄCQIÖаüº¬²»Í¬µÄÄÚÈÝ¡£
Table 7.2.3-0: PDSCH transmission scheme assumed for CQI reference resource
Transmission mode |
Transmission scheme of PDSCH |
1 |
Single-antenna port, port 0 |
2 |
Transmit diversity |
3 |
Transmit diversity if the associated rank indicator is 1, otherwise large delay CDD |
4 |
Closed-loop spatial multiplexing |
5 |
Multi-user MIMO |
6 |
Closed-loop spatial multiplexing with a single transmission layer |
7 |
If the number of PBCH antenna ports is one, Single-antenna port, port 0; otherwise Transmit diversity |
8 |
If the UE is configured without PMI/RI reporting: if the number of PBCH antenna ports is one, single-antenna port, port 0; otherwise transmit diversity If the UE is configured with PMI/RI reporting: closed-loop spatial multiplexing |
ÏÂÃæ¶ÔÖÜÆÚÐÔCQIÉϱ¨ºÍ·ÇÖÜÆÚÐÔCQIÉϱ¨·Ö¿ª½øÐÐÌÖÂÛ¡£
Ê×ÏÈ£¬¶ÔÓÚ·ÇÖÜÆÚµÄÉϱ¨¡£
UEÈç¹ûÔÚ×ÓÖ¡NÖУ¬½ÓÊÕµ½DCI¸ñʽ0£¬»òÕßÊÇRAR·´À¡£¬ÆäÖÐCQI RequestµÄλÉèÖÃΪ1²¢ÇÒδ±»Ô¤Áô£¬ÄÇôUE»áÔÚÏàÓ¦µÄÉÏÐÐ×ÓÖ¡£¬·´À¡ÏàÓ¦µÄCQI¡£
LTEÖй涨£¬UEÐèÒªÖ§³ÖÈçϼ¸ÖÖ²»Í¬Ä£Ê½µÄCQI·ÇÖÜÆÚÉϱ¨»úÖÆ¡£
Table 7.2.1-1: CQI and PMI Feedback Types for PUSCH reporting Modes
|
|
PMI Feedback Type | ||
|
|
No PMI |
Single PMI |
Multiple PMI |
PUSCH CQI Feedback Type |
|
|
|
|
Wideband |
|
|
Mode 1-2 | |
(wideband CQI) |
|
|
| |
|
|
|
| |
UE Selected |
Mode 2-0 |
|
Mode 2-2 | |
(subband CQI) |
|
|
| |
|
|
|
| |
Higher Layer-configured |
Mode 3-0 |
Mode 3-1 |
| |
(subband CQI) |
|
|
|
ÔÚ²»Í¬µÄ´«ÊäģʽÏ£¬UEÖ§³ÖµÄÉϱ¨Ä£Ê½ÈçÏÂËùʾ£º
Transmission mode 1 : Modes 2-0, 3-0
Transmission mode 2 : Modes 2-0, 3-0
Transmission mode 3 : Modes 2-0, 3-0
Transmission mode 4 : Modes 1-2, 2-2, 3-1
Transmission mode 5 : Mode 3-1
Transmission mode 6 : Modes 1-2, 2-2, 3-1
Transmission mode 7 : Modes 2-0, 3-0
Transmission mode 8 : Modes 1-2, 2-2, 3-1 if the UE is configured with PMI/RI reporting; modes 2-0, 3-0 if the UE is configured without PMI/RI reporting
RRCÐÅÁîÖеIJÎÊýcqi-ReportModeAperiodic¶¨ÒåÁËÅäÖøøUEËùʹÓõÄÉϱ¨Ä£Ê½¡£ÔÚUEÑ¡ÔñµÄ×Ó´øÉϱ¨µÄģʽÖУ¬UEÔÚ´óСΪKµÄ×Ó´øÖУ¬Ñ¡ÔñM¸öÊʺϣ¨Ó¦¸ÃÊÇ×îºÃ£©µÄ×Ó´ø£¬¼ÆËãÆäCQIµÄƽ¾ùÖµ£¬½«ÆäÉϱ¨¸øeNodeB¡£ÆäÖÐKºÍMµÄ´óСÓëϵͳµÄ´ø¿íÓйأ¬ÈçϱíËùʾ£º
Table 7.2.1-5: Subband Size (k) and Number of Subbands (M) in S vs. Downlink System Bandwidth
System Bandwidth |
Subband Size k (RBs) |
M |
| ||
6 ¨C 7 |
NA |
NA |
8 ¨C 10 |
2 |
1 |
11 ¨C 26 |
2 |
3 |
27 ¨C 63 |
3 |
5 |
64 ¨C 110 |
4 |
6 |
UEÐèÒªÉϱ¨Ò»¸ö¿í´øµÄCQI£¬¶ø½«M¸ö×Ó´øµÄCQIÒÔÏà¶ÔÓÚ¿í´øCQIÆ«ÒÆÖµµÄÐÎʽÓÉ2¸öBitÀ´±íʾ¡£CQIÖµÓëÆ«ÒÆÖµµÄ¶ÔÓ¦¹ØϵÈçϱíËùʾ£º
Table 7.2.1-4: Mapping differential CQI value to offset level
Differential CQI value |
Offset level |
0 |
£1 |
1 |
2 |
2 |
3 |
3 |
³4 |
ÓÉÓÚUEÑ¡ÔñµÄM¸ö×Ó´øµÄCQIÒª¸ßÓÚÕû¸öϵͳ´ø¿íµÄCQIÖµ£¬Òò´ËÉϱíÖеÄÆ«ÒÆÖµ£¨Ò»°ã£©²»´æÔÚ¸ºÊý¡£³ý´ËÖ®Í⣬UE»¹ÐèҪ֪ͨeNodeBÆäËùÑ¡ÔñµÄM¸ö×Ó´øÔÚϵͳ´ø¿íÖÐËù´¦µÄλÖá¾1¡¿¡£
³ýÁË·ÇÖÜÆÚÐÔµÄÉϱ¨£¬eNodeB»¹¿ÉÒÔͨ¹ýRRCÐÅÁîÖеIJÎÊýcqi-FormatIndicatorPeriodic£¬ÅäÖÃUE½øÐÐÖÜÆÚÐÔµÄÉϱ¨£¨°üÀ¨CQIµÄÉϱ¨Ä£Ê½£¬ËùʹÓõÄPUCCH×ÊÔ´ÒÔ¼°Éϱ¨ÖÜÆڵȣ©¡£ÖÜÆÚÐÔµÄÉϱ¨ÖУ¬Ö§³ÖµÄÉϱ¨Ä£Ê½ÈçϱíËùʾ£º
Table 7.2.2-1: CQI and PMI Feedback Types for PUCCH reporting Modes
|
|
PMI Feedback Type | |
|
|
No PMI |
Single PMI |
PUCCH CQI Feedback Type |
|
|
|
Wideband |
Mode 1-0 |
Mode 1-1 | |
(wideband CQI) |
|
| |
|
|
| |
UE Selected |
Mode 2-0 |
Mode 2-1 | |
(subband CQI) |
|
|
ÔÚ²»Í¬µÄ´«ÊäģʽÏ£¬ËùÄܹ»Ö§³ÖµÄCQIÉϱ¨Ä£Ê½ÈçÏ£º¡¾1¡¿
Transmission mode 1 : Modes 1-0, 2-0
Transmission mode 2 : Modes 1-0, 2-0
Transmission mode 3 : Modes 1-0, 2-0
Transmission mode 4 : Modes 1-1, 2-1
Transmission mode 5 : Modes 1-1, 2-1
Transmission mode 6 : Modes 1-1, 2-1
Transmission mode 7 : Modes 1-0, 2-0
Transmission mode 8 : Modes 1-1, 2-1 if the UE is configured with PMI/RI reporting; modes 1-0, 2-0 if the UE is configured without PMI/RI reporting
ÔÚÖÜÆÚÐÔÉϱ¨µÄÇé¿öÏ£¬²»Ö§³ÖÉϲãÅäÖõÄ×Ó´øCQIÉϱ¨¡£¶ÔÓÚUEÑ¡ÔñµÄ×Ó´øÉϱ¨£¬Óë·ÇÖÜÆÚÐÔÉϱ¨µÄÇé¿öÒ²ÓÐËù²»Í¬¡£ÔÚÖÜÆÚÐÔµÄÉϱ¨ÖУ¬È«²¿N¸ö×Ó´ø±»·Ö³ÉJ¸ö×Ó´ø×飬ÆäÖÐ×Ó´øµÄ´óСK£¨µ¥Î»ÊÇRB£©ºÍ×Ó´ø×éµÄÊýÄ¿JÓëϵͳµÄ´ø¿íÓйأ¬ÈçϱíËùʾ¡£
Table 7.2.2-2: Subband Size (k) and Bandwidth Parts (J) vs. Downlink System Bandwidth
System Bandwidth |
Subband Size k (RBs) |
Bandwidth Parts (J) |
|
| |||
6 ¨C 7 |
NA |
NA |
|
8 ¨C 10 |
4 |
1 |
|
11 ¨C 26 |
4 |
2 |
|
27 ¨C 63 |
6 |
3 |
|
64 ¨C 110 |
8 |
4 |
|
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CQI/PMIÖÜÆÚÐÔÉϱ¨µÄÖÜÆÚ £¨µ¥Î»ÊÇ×ÓÖ¡£©ÒÔ¼°Æ«ÒÆ £¨µ¥Î»ÊÇ×ÓÖ¡£©È¡¾öÓÚRRCÖеÄÐÅÁî²ÎÊýcqi-pmi-ConfigIndex£¬RIÖÜÆÚÐÔÉϱ¨µÄÖÜÆÚ ºÍÆ«ÒÆ È¡¾öÓÚRRCÖеÄÐÅÁî²ÎÊýri-ConfigIndex¡£
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