Lenovo's Key NEC 3G & & 4G LTE Standard Essential Patents for Smartphones


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Lenovo's Key NEC 3G & & 4G LTE Standard Essential Patents for Smartphones

  1. 1. Lenovo's Key NEC 3G & & 4G Standard Essential Patents for Smartphones Recently, Lenovo agreed to acquire 3,800 patent families from NEC to protect its smartphone business. Followings are the key standard essential patents (SEPs) relating to 3G and 4G mobile communications selected from around 20 potential SEPs issued in the US that are indentified by TechIPm’s essentiality evaluation. For more information, please contact Alex Lee at alexglee@techipm.com. Patent Number Title Abstract/Claim Standard Specifications Families US7203208 Mobile communicati on system, communicati on control method and, base station and mobile station to be employed in the same In the communication system performing transmission with generating the vacant period in the slotted mode during data transmission in order to perform various process, such as different frequency carrier quality measurement or so forth, the control signal for maintaining a communication quality is inserted even in the vacant period. Therefore, a link quality may not be degraded even if the vacant period is long. Namely, when the pilot signal is used as the control signal, even in the vacant period, measurement of the link quality of the 3GPP TS 25.212 4.4 Compressed mode In compressed frames, TGL slots from Nfirst to Nlast are not used for transmission of data. As illustrated in figure 11, the instantaneous transmit power is increased in the compressed frame in order to keep the quality (BER, FER, etc.) unaffected by the reduced processing gain. The amount of power increase depends on the transmission time reduction method (see subclause 4.4.3). What frames are CA2267841A1, CA2267841C, CN1115904C, CN1234707A, EP0949830A2, EP0949830A3, EP0949830B1, EP1624708A2, EP1624708A3, US7154915, US7940811, US7944950, US20030118057,
  2. 2. forward link with the pilot signal is performed in the mobile station to report the result of measurement to the base station. Therefore, transmission power control of the forward link can be performed according to the report in the base station. Therefore, degradation of the forward link can be eliminated. compressed, are decided by the network. When in compressed mode, compressed frames can occur periodically, as illustrated in figure 11, or requested on demand. The rate and type of compressed frames is variable and depends on the environment and the measurement requirements. Figure 11: Compressed mode transmission US20070058593 , US20070081501 , US20110176470, US20110176533, US20110243028, US20110243049, US 6847818 Transmission power control method and system A transmission power control technique allowing stable and reliable signal transmission in soft handover is disclosed. Each of the base stations involved in soft 3GPP TS 25.214 Site selection diversity transmit power control CA2324727A1, CA2324727C, DE60034759D1, DE60034759T2, Oneframe (10ms) Transmissiongapavailablefor inter-frequencymeasurements
  3. 3. handover measures an amount of loss of the base station selection signal. When the amount of loss of the base station selection signal exceeds a threshold, the transmission power of the downlink signal is not set to the minimum level but to the normally controlled level. Further, a transmission power update timing of each base station is determined so that the downlink signal received at the mobile station changes in transmission power at a predetermined timing synchronized with that of other base stations. Site selection diversity transmit power control (SSDT) is another macro diversity method in soft handover mode. This method is optional in UTRAN. The UE selects one of the cells from its active set to be ‘primary’, all other cells are classed as ‘non primary’. The main objective is to transmit on the downlink from the primary cell, thus reducing the interference caused by multiple transmissions in a soft handover mode. A second objective is to achieve fast site selection without network intervention, thus maintaining the advantage of the soft handover. In order to select a primary cell, each cell is assigned a temporary identification (ID) and UE periodically informs a primary cell ID to the connecting cells. The non-primary cells selected by UE switch off the transmission power. The EP1109330A2, EP1109330A3, EP1109330B1, EP1478102A1, EP1478102B1, EP1770872A2, EP1770872A3, EP2293628A1, EP2296411A1, US7242959, US7912493, US8478330, US20040152483 , US20070232315 , US20110130145
  4. 4. primary cell ID is delivered by UE to the active cells via uplink FBI field. SSDT activation, SSDT termination and ID assignment are all carried out by higher layer signalling. US6359864 FDD/CDMA Transmission /reception system An FDD/CDMA transmission/reception system includes a CDMA transmitter and a CDMA receiver. The CDMA transmitter includes a plurality of transmission antennas, signal transmission units for transmitting transmission signals weighted by different values to the respective transmission antennas, and pilot signal transmission units for transmitting a plurality of different pilot signals to the respective transmission antennas. The CDMA receiver includes a reception unit for obtaining one received signal from the transmission signals from the plurality of transmission antennas of the CDMA 3GPP TS 25.211 5.3.3 Common downlink physical channels In case transmit diversity (open or closed loop) is used on any downlink channel in the cell, the CPICH shall be transmitted from both antennas using the same channelization and scrambling code. In this case, the pre-defined bit sequence of the CPICH is different for Antenna 1 and Antenna 2, see figure 14. In case of no transmit diversity, the bit sequence of Antenna 1 in figure 14 is used. DE69629633D1, DE69629633T2, DE69637911D1, EP0755127A2, EP0755127A3, EP0755127B1, EP1133074A2, EP1133074A3, EP1133074B1, US5886987, US7324470, US7830829, US20020012333 , US20070104154
  5. 5. transmitter in consideration of reception quality, and a unit for transmitting antenna control signals corresponding to reception power values of the received pilot signals to the CDMA transmitter. slot #1 Frame#i+1Frame#i slot #14 Antenna 2 Antenna 1 slot #0 FrameBoundary 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 Figure 14: Modulation pattern for Common Pilot Channel US8548008 Single carrier transmission system, communicati on device, and single carrier transmission method using for them The invention claimed is: 1. A wireless communication system comprising: a mobile station comprising a transmitter which transmits a data signal and a pilot signal; and a base station comprising a receiver which demodulates the data signal based on the pilot signal, wherein the transmitter calculates a sequence of the pilot signal in a frequency domain according to a present numerical formula and a Zadoff-Chu sequence, wherein the length of the Zadoff-Chu sequence is a largest prime number among 3GPP TS 36.211 5.5 Reference signals Reference signal sequence )()( , nr vu  is defined by a cyclic shift  of a base sequence )(, nr vu according to RS sc, )( , 0),()( Mnnrenr vu nj vu   where RB sc RS sc mNM  is the length of the reference signal sequence and ULmax, RB1 Nm  . Multiple reference signal sequences are defined from a single base sequence through different values of  . Base sequences )(, nr vu are divided into groups, where  29,...,1,0u is the group CN101421956A, CN101421956B, CN103297371A, EP1983672A1, EP1983672A4, EP2579534A2, EP2579534A3, US20090052427 , US20140003544 , WO2007091590 A1,
  6. 6. at least one prime number which is less than the length of the pilot signal. number and v is the base sequence number within the group, such that each group contains one base sequence ( 0v ) of each length RB sc RS sc mNM  , 51  m and two base sequences ( 1,0v ) of each length RB sc RS sc mNM  , ULmax, RB6 Nm  . The sequence group number u and the number v within the group may vary in time as described in Sections and, respectively. The definition of the base sequence )1(),...,0( RS sc,, Mrr vuvu depends on the sequence length RS scM . . ©2014 TechIPm, LLC All Rights Reserved