-
公开(公告)号：US10511462B2
公开(公告)日：2019-12-17
申请号：US15375245
申请日：2016-12-12
申请人： Apple Inc.
摘要： Techniques are disclosed relating to DC interference cancelation in received wireless signals. Disclosed techniques may be performed in the digital domain, in conjunction with analog cancelation techniques. In some embodiments, a receiver apparatus operates a local oscillator at a frequency corresponding to a particular pilot symbol in a received wireless signal. In some embodiments the receiver estimates DC interference at the frequency based on the received pilot symbol (this may be facilitated by the fact that the contents of pilot symbols are known, because they are typically used for channel estimation). In some embodiments, the receiver apparatus is configured to cancel the DC interference based on the estimate to determine received data in subsequently received signals at the frequency. Disclosed techniques may allow narrowband receivers to efficiently use more of their allocated frequency bandwidth, rather than wasting bandwidth near the frequency of the local oscillator.
-
公开(公告)号：US10484894B2
公开(公告)日：2019-11-19
申请号：US15961779
申请日：2018-04-24
申请人： Apple Inc.
发明人： Francisco J. Gonzalez , Rafael L. Rivera-Barreto , Rohan C. Malthankar , Sarma V. Vangala , Tarik Tabet
摘要： System and methods for providing special radio provisions to link budget limited devices. Before establishing a cellular connection with a cellular network, a user equipment device (UE), such as a link budget limited UE, may negotiate the special radio provisions with the network by presenting requested profile information to the network, and receiving back approved profile information from the network. The UE may perform these communications either directly, via a non-cellular communication connection with the network, or indirectly, via a companion or proxy device. When the UE initiates a cellular connection with the network, both entities may use information specified in the approved profile information, which may improve efficiency of the connection. In some scenarios, the approved profile information may identify a class of devices to which the UE belongs. The approved profile information may also be used in establishing connections with other devices of the same class.
-
公开(公告)号：US10470088B2
公开(公告)日：2019-11-05
申请号：US15790230
申请日：2017-10-23
申请人： Apple Inc.
发明人： Syed Aon Mujtaba , Tarik Tabet , Paul V. Flynn , Kee-Bong Song
IPC分类号： H04W36/00 , H04W76/28 , H04W36/14 , H04W36/32 , H04W68/04 , H04W68/12 , H04W88/06 , H04W88/08
摘要： A user equipment (UE) operating in a communication system comprising a base station and one or more UEs. The UE may be configured to operate on or “camp” on two different networks with one radio. In this exemplary system, the radio may be normally connected to the first network (NW1) and may from time to time be “tuned away” from NW1 to a second network (NW2). The UE may inform NW1 that it has tuned away to another network, e.g., using start and end indicators. This information may prevent NW1 from wasting downlink capacity by unnecessarily allocating downlink resources to the UE during the tune-away. Alternatively, or in addition, this information may prevent NW1 from penalizing the UE, e.g., by reducing its future downlink allocations, since the UE does not respond to NW1 commands during the tune-away.
-
公开(公告)号：US10412669B2
公开(公告)日：2019-09-10
申请号：US15273462
申请日：2016-09-22
申请人： Apple Inc.
摘要： In some embodiments, a cellular modem that has reduced power requirements. The cellular modem architecture is divided into three orthogonal domains or modules, these being a control module, an uplink module, and a downlink module. Each of the uplink module and the downlink module is configured to be separately powered down without affecting operation of the other modules.
-
25.发明申请公开(公告)号：US20190274057A1
公开(公告)日：2019-09-05
申请号：US16414377
申请日：2019-05-16
申请人： Apple Inc.
发明人： Francisco J. Gonzalez , Rafael L. Rivera-Barreto , Rohan C. Malthankar , Sarma V. Vangala , Tarik Tabet
摘要： System and methods for providing special radio provisions to link budget limited devices. Before establishing a cellular connection with a cellular network, a user equipment device (UE), such as a link budget limited UE, may negotiate the special radio provisions with the network by presenting requested profile information to the network, and receiving back approved profile information from the network. The UE may perform these communications either directly, via a non-cellular communication connection with the network, or indirectly, via a companion or proxy device. When the UE initiates a cellular connection with the network, both entities may use information specified in the approved profile information, which may improve efficiency of the connection. In some scenarios, the approved profile information may identify a class of devices to which the UE belongs. The approved profile information may also be used in establishing connections with other devices of the same class.
-
公开(公告)号：US10341952B2
公开(公告)日：2019-07-02
申请号：US15274970
申请日：2016-09-23
申请人： Apple Inc.
发明人： Moustafa M. Elsayed , Tarik Tabet
摘要： A wireless communication device (UE) may include a paging subsystem that performs paging-monitoring as part of wireless communications of the wireless communication device. The UE may place wireless communication system resources not required during paging-monitoring into either a low-power state or a power-down state, and those system resources may remain in one of those respective states during paging-monitoring. The wireless communication system resources not required during the paging-monitoring may include at least a wireless communications protocol stack used during the wireless communications of the UE, and at least system resources used for performing uplink related tasks independently of wireless communication system resources used for performing downlink related tasks. The paging subsystem may include at least a control manager subsystem capable of decoding a physical downlink control channel, a downlink control subsystem capable of performing tasks related to a physical downlink data channel, and a message parser for parsing paging messages.
-
27.发明授权公开(公告)号：US10230505B2
公开(公告)日：2019-03-12
申请号：US15200627
申请日：2016-07-01
申请人： APPLE INC.
发明人： Huarui Liang , Tarik Tabet , Dawei Zhang
IPC分类号： H04L5/00 , H04W16/14 , H04W48/16 , H04W36/00 , H04J11/00 , H04L27/00 , H04L12/24 , H04W72/04 , H04W72/08 , H04W28/04
摘要： Described herein are systems and methods for carrier aggregation deployment and organization in unlicensed bands. A method may comprise scanning, by a transceiver within a base station, channels in a band of interest, reporting, by the transceiver, signal measurement information to the base station, cell searching, by the transceiver, channels in the band of interest, determining channel information for neighboring each channel, and transmitting, by the transceiver, the channel information to the base station.
-
28.发明申请公开(公告)号：US20190007823A1
公开(公告)日：2019-01-03
申请号：US16125799
申请日：2018-09-10
申请人： Apple Inc.
发明人： Yuchul Kim , Xiaowen Wang , Tarik Tabet , Dawei Zhang , Syed Aon Mujtaba
CPC分类号： H04W8/005 , H04W52/0241 , H04W76/14 , Y02D70/00 , Y02D70/1242 , Y02D70/1262 , Y02D70/1264 , Y02D70/142 , Y02D70/144 , Y02D70/146 , Y02D70/164 , Y02D70/168 , Y02D70/26
摘要： In some embodiments, a user equipment device (UE) implements a method for discovering the presence of neighboring UEs using an on-demand discovery signal transmission technique. This discovery process may be performed to enable the UEs to perform peer-to-peer communications with each other, wherein peer-to-peer communications is defined as direct communication between the UEs without involving a base station. The UE may be configured to transmit a discovery request signal when it has moved greater than a threshold amount since transmission of a prior discovery request signal. The discovery request signal causes one or more neighboring UEs to each transmit a discovery signal in response, and also causes the UE which generated the discovery request signal to transmit its own discovery signal. The received discovery signal from each of the neighboring UEs is useable to discover, or detect the presence of, these neighboring UEs.
-
公开(公告)号：US20180352547A1
公开(公告)日：2018-12-06
申请号：US16057906
申请日：2018-08-08
申请人： Apple Inc.
发明人： Tarik Tabet , Syed Aon Mujtaba
CPC分类号： H04W72/0413 , H04L1/1635 , H04L1/1812 , H04L1/1819 , H04L1/1887 , H04L5/0044 , H04L5/0048 , H04L5/0055 , H04L5/0092 , H04L27/2614 , H04W76/28 , Y02D70/00 , Y02D70/10 , Y02D70/12 , Y02D70/1242 , Y02D70/126 , Y02D70/1262 , Y02D70/1264 , Y02D70/142 , Y02D70/144 , Y02D70/146 , Y02D70/164 , Y02D70/168 , Y02D70/20 , Y02D70/23 , Y02D70/25 , Y02D70/26
摘要： A user equipment (UE) and base station may implement improved communication methods which enable a UE that is peak current limited to perform UL transmissions which are consistent with the UL timeline. A UE that is peak current limited may utilize a new form of distributed TTI (transmit time interval) bundling for improved uplink communication performance. In performing “distributed” TTI bundling, the UE may transmit a plurality of redundancy versions of first information to the base station, wherein the plurality of redundancy versions are transmitted in non-consecutive sub-frames with a periodicity of X ms. After the plurality of redundancy versions of first information are transmitted to the base station, the base station may provide a single acknowledge/negative acknowledge (ACK/NACK) to the UE. A method for dynamically generating and using a bundle size for TTI bundling is also disclosed.
-
公开(公告)号：US10110355B2
公开(公告)日：2018-10-23
申请号：US14636028
申请日：2015-03-02
申请人： Apple Inc.
发明人： Farouk Belghoul , Tarik Tabet , Dawei Zhang , Huarui Liang
摘要： Methods and apparatus for using an unlicensed radio frequency band component carrier for uplink transmission are disclosed. A wireless communication device receives a carrier aggregation configuration, which can include at least one licensed radio frequency band component carrier and at least one unlicensed radio frequency band component carrier. The wireless communication device establishes a set of radio bearers and associates an unlicensed radio frequency band permission level with each of the radio bearers. The wireless communication device multiplexes uplink traffic for the radio bearers on the at least one licensed radio frequency band component carrier and the at least one unlicensed radio frequency band component carrier based at least in part on the unlicensed radio frequency band permission levels associated with the radio bearers.
-
-
-
-
-
-
-
-
-
搜索结果
453 条记录 (耗时 0.029 秒)
