Source: https://patents.google.com/patent/US9185693B2/en
Timestamp: 2020-02-26 04:24:36
Document Index: 577307694

Matched Legal Cases: ['Application No. 2008', 'Application No. 2008', 'Application No. 2009', 'application No. 2009239007', 'Application No. 09734433', 'Application No. 2', 'Application No. 20098011496', 'Application No. 2009', 'Application No. 2009', 'Application No. 2010', 'Application No. 2010', 'Application No. 2010145763', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 09734433']

US9185693B2 - Mobile communication method, mobile station, and radio base station - Google Patents
US9185693B2
US9185693B2 US13/746,708 US201313746708A US9185693B2 US 9185693 B2 US9185693 B2 US 9185693B2 US 201313746708 A US201313746708 A US 201313746708A US 9185693 B2 US9185693 B2 US 9185693B2
US13/746,708
US20130136081A1 (en
2008-04-22 Priority to JP2008111921 priority Critical
2008-04-22 Priority to JP2008-111921 priority
2008-05-29 Priority to JP2008-141684 priority
2008-05-29 Priority to JP2008141684 priority
2009-04-20 Priority to JP2009102493A priority patent/JP4511621B2/en
2009-04-20 Priority to JP2009-102493 priority
2009-04-22 Priority to PCT/JP2009/057981 priority patent/WO2009131143A1/en
2011-01-07 Priority to US98903711A priority
2013-01-22 Priority to US13/746,708 priority patent/US9185693B2/en
2013-01-22 Application filed by NTT Docomo Inc filed Critical NTT Docomo Inc
2013-05-30 Publication of US20130136081A1 publication Critical patent/US20130136081A1/en
2015-11-10 Publication of US9185693B2 publication Critical patent/US9185693B2/en
230000002085 persistent Effects 0 description 252
In a mobile communication method according to the present invention, a mobile station (UE) receives downlink data transmitted from a radio base station by using a downlink radio resource assigned to the mobile station by predetermined scheduling information, in a predetermined cycle. The method includes the steps: (A) notifying, to the mobile station (UE), the predetermined cycle and information on the downlink radio resource; (B) notifying, to the mobile station (UE), the predetermined scheduling information; and (C) transmitting downlink data in the predetermined cycle by using the downlink radio resource assigned by the predetermined scheduling information, the transmission starting at a certain point determined on the basis of the received predetermined scheduling information. In the step (C), the predetermined scheduling information is discarded, when the information on the downlink radio resource and information notified by the predetermined scheduling information are inconsistent with each other.
This application is a Continuation Application of the U.S. patent application Ser. No. 12/989,037, filed on Oct. 21, 2010, which claims priority to PCT International Application No. PCT/JP2009/057981, filed on Apr. 22, 2009, which claims priority to Japanese Patent Application No. 2008-111921, filed on Apr. 22, 2008, Japanese Patent Application No. 2008-141684, filed on May 29, 2008, and Japanese Patent Application No. 2009-102493, filed on Apr. 20, 2009. The contents of these prior applications are incorporated herein by reference in their entirety.
Here, since each of the number of bits for the CRC bits and the number of the RNTI bits is 16 bits, the False Alarm occurs with a probability of ½16. Accordingly, when 40 uplink scheduling grants or 40 pieces of downlink scheduling information are to be decoded, the probability of the occurrence of the False Alarm is ½16×40.
DESCRIPTION OF EMBODIMENTS Configuration of Mobile Communication System According to First Embodiment of Present Invention
(Data size expressed by a decimal number)=23 ×a+22 ×b+21 ×c+20 ×d
Here, when “a”, which is the “Most Significant bit”, is not “0”, i.e., when “a” is “1”, the data size is at least “8”.
Specifically, the mobile station UE may discard the persistent assignment signal, when a part of the bits of the “MCS information” in the persistent assignment signal is not a predetermined value.
As described above, the probability of the occurrence of the False Alarm for one PDCCH (uplink scheduling grant or downlink scheduling grant information) is ½16.
In general, the mobile station UE attempts to decode about 40 PDCCHs in a single sub-frame, the total probability of the occurrence of the False Alarm is calculated as 40×½16=0.0006.
Here, the False Alarm described above is a phenomenon in which the mobile station UE determines incidentally that a PDCCH is transmitted to the mobile station UE itself although the PDCCH is not transmitted to the mobile station UE itself. Thus, the decoded information in this case is highly likely to be nonsense information.
Accordingly, as described above, a limitation is provided in the range of information in a PDCCH, and when the mobile station UE receives a PDCCH having information outside the limited range, the mobile station UE performs processing to discard the PDCCH. Thus, the probability of the occurrence of the False Alarm can be significantly reduced.
For example, suppose that the number of bits in a PDCCH other than CRC is 24 bits, and a 12-bit range among the 24 bits in the PDCCH is limited. For the sake of simplicity of calculation, suppose that the bit pattern of 12 bits is limited to a single kind. In this case, as described above, a limitation is provided in the range of information in the PDCCH, and when the mobile station UE receives a PDCCH having information outside the limited range, the mobile station UE performs processing to discard the PDCCH. Thus, the probability of the occurrence of the False Alarm is calculated as follows:
40×½16×½12/224=1.5×10−7.
Thus, the probability of the occurrence of False Alarm is made much smaller in this case.
Specifically, the mobile communication system according to the first embodiment of the present invention is capable of reducing the probability of the occurrence of the “False Alarm” of a PDCCH (downlink scheduling information) indicating a resource assignment for the Persistent scheduling. As a result, the mobile communication system according to the first embodiment of the present invention is capable of providing a stable and efficient mobile communication method, a mobile station, and a radio base station.
1. A mobile communication method in which a mobile station receives downlink data transmitted from a radio base station by using a downlink radio resource assigned to the mobile station by predetermined scheduling information instructing semi-persistent assignment of the downlink radio resource, in a predetermined cycle, the method comprising the steps:
(A) receiving the predetermined cycle from the radio base station;
(B) receiving the predetermined scheduling information from the radio base station;
(C) receiving downlink data in the predetermined cycle by using the downlink radio resource assigned by the predetermined scheduling information without receiving any downlink scheduling information dynamically assigning the downlink radio resource, the reception starting at a certain point determined on the basis of the received predetermined scheduling information, wherein
the predetermined scheduling information is discarded and the reception is not started so as to reduce a probability of an occurrence of a false alarm in downlink scheduling information for semi-persistent scheduling, when the information included in the predetermined scheduling information does not match at least one of previously defined “MCS information,” “TPC,” and “HARQ process information.”
2. A mobile communication method in which a mobile station receives downlink data transmitted from a radio base station by using a downlink radio resource assigned to the mobile station by predetermined scheduling information instructing semi-persistent assignment of the downlink radio resource, in a predetermined cycle, the method comprising the steps of:
(B) receiving the predetermined scheduling information from the radio base station; and
the step (C) is performed so as to reduce a probability of an occurrence of a false alarm in downlink scheduling information for semi-persistent scheduling, when the information included in the predetermined scheduling information matches previously defined “MCS information” and “HARQ process information.”
3. A mobile station configured to receive downlink data transmitted from a radio base station by using a downlink radio resource assigned to the mobile station by predetermined scheduling information instructing semi-persistent assignment of the downlink radio resource, in a predetermined cycle, the mobile station comprising:
a receiver unit configured to receive the predetermined cycle from the radio base station; and
a communication unit configured to receive downlink data in the predetermined cycle by using the downlink radio resource assigned by the predetermined scheduling information without receiving any downlink scheduling information dynamically assigning the downlink radio resource, the reception starting at a certain point determined on the basis of the predetermined scheduling information received from the radio base station, wherein
the communication unit is configured to discard the predetermined scheduling information and does not start the reception, when the information included in the predetermined scheduling information does not match at least one of previously defined “MCS information,” “TPC,” and “HARQ process information.”
US13/746,708 2008-04-22 2013-01-22 Mobile communication method, mobile station, and radio base station Active 2029-06-13 US9185693B2 (en)
JP2008111921 2008-04-22
JP2008-111921 2008-04-22
JP2008-141684 2008-05-29
JP2008141684 2008-05-29
JP2009102493A JP4511621B2 (en) 2008-04-22 2009-04-20 Mobile communication method, mobile station and radio base station
JP2009-102493 2009-04-20
PCT/JP2009/057981 WO2009131143A1 (en) 2008-04-22 2009-04-22 Mobile communication method, mobile station, and radio base station
US98903711A true 2011-01-07 2011-01-07
US13/746,708 US9185693B2 (en) 2008-04-22 2013-01-22 Mobile communication method, mobile station, and radio base station
PCT/JP2009/057981 Continuation WO2009131143A1 (en) 2008-04-22 2009-04-22 Mobile communication method, mobile station, and radio base station
US12/989,037 Continuation US8767643B2 (en) 2008-04-22 2009-04-22 Mobile communication method, mobile station, and radio base station
US98903711A Continuation 2011-01-07 2011-01-07
US20130136081A1 US20130136081A1 (en) 2013-05-30
US9185693B2 true US9185693B2 (en) 2015-11-10
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US12/989,037 Active US8767643B2 (en) 2008-04-22 2009-04-22 Mobile communication method, mobile station, and radio base station
US13/746,708 Active 2029-06-13 US9185693B2 (en) 2008-04-22 2013-01-22 Mobile communication method, mobile station, and radio base station
US (2) US8767643B2 (en)
EP (2) EP2651172B1 (en)
JP (1) JP4511621B2 (en)
KR (1) KR101144099B1 (en)
CN (1) CN102017771B (en)
AU (1) AU2009239007B2 (en)
BR (2) BRPI0911409A2 (en)
CA (1) CA2725426C (en)
ES (1) ES2622552T3 (en)
MX (1) MX2010011633A (en)
WO (1) WO2009131143A1 (en)
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2009-04-20 JP JP2009102493A patent/JP4511621B2/en active Active
2009-04-22 EP EP09734433.7A patent/EP2276309B1/en active Active
2009-04-22 MX MX2010011633A patent/MX2010011633A/en active IP Right Grant
2009-04-22 KR KR1020107024754A patent/KR101144099B1/en active IP Right Grant
2009-04-22 CN CN200980114496.2A patent/CN102017771B/en active IP Right Grant
2009-04-22 EP EP13175699.1A patent/EP2651172B1/en active Active
2009-04-22 CA CA2725426A patent/CA2725426C/en active Active
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2009-04-22 BR BRPI0911409-2A2A patent/BRPI0911409A2/en not_active IP Right Cessation
2009-04-22 WO PCT/JP2009/057981 patent/WO2009131143A1/en active Application Filing
2009-04-22 US US12/989,037 patent/US8767643B2/en active Active
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MX2010011633A (en) 2010-11-30
KR101144099B1 (en) 2012-05-25
EP2276309A4 (en) 2011-09-07
US20110103336A1 (en) 2011-05-05
EP2276309A1 (en) 2011-01-19
EP2651172A2 (en) 2013-10-16
CA2725426C (en) 2017-04-11
CA2725426A1 (en) 2009-10-29
EP2651172A3 (en) 2016-01-27
US20130136081A1 (en) 2013-05-30
CN102017771A (en) 2011-04-13
BRPI0911409A2 (en) 2014-02-25
CN102017771B (en) 2014-07-02
WO2009131143A1 (en) 2009-10-29
BR122012031022A2 (en) 2015-07-14
AU2009239007B2 (en) 2014-03-06
KR20110008079A (en) 2011-01-25
ES2622552T3 (en) 2017-07-06
AU2009239007A1 (en) 2009-10-29
US8767643B2 (en) 2014-07-01
EP2651172B1 (en) 2017-01-18
JP4511621B2 (en) 2010-07-28
EP2276309B1 (en) 2015-11-11
JP2014509811A (en) 2014-04-21 Effective extended power headroom reporting for semi-persistent scheduling
JP2010525635A (en) 2010-07-22 Synchronous adaptation HARQ