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公开(公告)号：US20200266961A1
公开(公告)日：2020-08-20
申请号：US16789611
申请日：2020-02-13
Applicant: Mediatek Inc.
Inventor： Lung-Sheng Tsai , Pei-Kai Liao , Weidong Yang
Abstract: A UE receives a bandwidth part switch command from a first TRP, the bandwidth part switch command instructing the UE to switch from communicating on a first bandwidth part to communicating on a second bandwidth part. The UE (a) determines to accept the bandwidth part switch command based on a priority level of the first TRP among the plurality of TRPs or (b) informs other TRPs of the plurality of TRPs. The UE switches from communicating on the first bandwidth part to communicating on the second bandwidth part. A first TRP determines whether the first TRP is a primary TRP instructing to switch from communicating on a first bandwidth part to communicating on a second bandwidth part. The first TRP communicates with the UE via the first TRP on either the first bandwidth part or the second bandwidth part, when the first TRP is the primary TRP.
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公开(公告)号：US20200228249A1
公开(公告)日：2020-07-16
申请号：US16835457
申请日：2020-03-31
Applicant: Mediatek Inc.
Inventor： Pei-Kai Liao , Ming-Che Lu , Yan-Shuo Chang , Chien-Hwa Hwang
Abstract: An efficient Hybrid Automatic Repeat Request (HARQ) operation for low-latency and high-performance services in one radio access technology (RAT) in a wireless communication network is proposed. Under the proposed single HARQ operation scheme, an adaptive HARQ-ACK feedback timing is applied based on UE conditions and UE capability to support the tradeoff between low-latency and high-performance applications. In one embodiment, UE signals the network its HARQ-ACK timing capability. Furthermore, an adaptive number of HARQ processes is applied with a fixed HARQ soft buffer size because the hardware cost for HARQ soft buffer does not linearly increase with the number of HARQ processes. In one embodiment, UE determines a nominal HARQ soft buffer size and HARQ soft buffer size for each HARQ process based on a network-configured HARQ process number.
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公开(公告)号：US10594468B2
公开(公告)日：2020-03-17
申请号：US16145704
申请日：2018-09-28
Applicant: MEDIATEK INC.
Inventor： Pei-Kai Liao , Chia-Chun Hsu
Abstract: Apparatus and methods are provided for efficient bandwidth adaptation for wideband carrier. In one novel aspect, the UE starts a BWP timer upon detecting one or more BWP timer starting triggering events, resets the BWP timer upon detecting BWP resetting triggering events, and switches to the default BWP upon expiration of the BWP timer. The BWP timer starting triggering events comprises decoding a command to switch away from the default BWP, the detection of end of DL data transmission in DRX mode. In another novel aspect, the UE only decodes the DCI indication for active BWP switching in the first three OFDM symbols of a subframe or a slot. In yet another novel aspect, when the SPS is configured for the serving cell for a UE with multiple BWPs, the SPS is configured for all the BWPs accordingly.
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公开(公告)号：US20200008181A1
公开(公告)日：2020-01-02
申请号：US16559373
申请日：2019-09-03
Applicant: MEDIATEK INC.
Inventor： Chien-Hwa Hwang , Weidong Yang , Pei-Kai Liao , Wei-De Wu
Abstract: A method to improve the design of new radio physical downlink control channel (NR-PDCCH) transmission and to reduce the false alarm rate of NR-PDCCH blind decoding is proposed. The downlink control information (DCI) bits are carried by NR-PDCCH to be transmitted to UEs after CRC attachment, channel encoding, interleaving, and modulation. The proposed NR-PDCCH design is separated into two parts. In a first part, a UE-ID or RNTI is used to derive a CRC mask or a scrambling sequence for CRC attachment of the DCI bits. In a second part, a UE-specific ID is used to derive an interleaver before or after channel encoding of the DCI bits. If the interleaver is placed before channel encoding, it takes the form of a bit interleaver. If the interleaver is placed after channel encoding, it takes the form of a bit interleaver or a channel interleaver.
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公开(公告)号：US20190150129A1
公开(公告)日：2019-05-16
申请号：US16247570
申请日：2019-01-15
Applicant: MEDIATEK INC.
Inventor： Pei-Kai Liao , Yi-Ju Liao
Abstract: A method of two-stage scheduling in downlink control channel is proposed to enhance downlink control information (DCI) forward compatibility and hardware flexibility. The DCI comprises a basic DCI and an extended DCI. The basic DCI provides basic scheduling information of the scheduled data. The extended DCI provides extended scheduling information of the scheduled data channel. The basic DCI can be unicast to a single UE over UE-specific search space. The basic DCI can also be broadcast or multicast to a group of UEs over common search space. UE performs blind detection of the basic DCI only, while the location and size of the extended DCI can be provided by the basic DCI or provided by a higher layer signaling. Cross-slot/subframe and Multi-slot/subframe scheduling can also be applied in the two-stage scheduling.
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Patent Agency Ranking
公开(公告)号：US20180324688A1
公开(公告)日：2018-11-08
申请号：US15969982
申请日：2018-05-03
Applicant: Mediatek Inc.
Inventor： Chien-Chang Li , Yiju Liao , Chien Hwa Hwang , Pei-Kai Liao
CPC classification number: H04W48/16 , H04L5/0007 , H04W72/042 , H04W72/1205
Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. In accordance with the method, the UE receives symbols in a time slot. The time slot includes a control region and a data region. The UE further determines a down link data channel specific to the UE carried by the received symbols in the data region. The down link data channel is provided on at least one range of frequencies. The UE further determines that one or more of the received symbols on the at least one range of frequencies and in the control region are a part of the down link data channel.
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公开(公告)号：US20180317207A1
公开(公告)日：2018-11-01
申请号：US15963366
申请日：2018-04-26
Applicant: Mediatek Inc.
Inventor： Yiju Liao , Chien Hwa Hwang , Chien-Chang Li , Pei-Kai Liao
Abstract: An UE receives a downlink control channel. The UE also receives an aggregation indication indicating that a downlink control channel contains downlink control information (DCI) for one or more resource locations of the UE. The UE further determines that a payload size selected from a list of payload sizes is a size of a payload of the downlink control channel. The UE further determines an entry size of each entry of a number of DCI entries that are included in the payload and are corresponding to the one or more resource locations based on downlink transmission parameters at the one or more resource locations. The UE also locates from the payload, based on the selected payload size and the entry sizes of the number of DCI entries, bits of each entry of the number of DCI entries.
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公开(公告)号：US10050683B2
公开(公告)日：2018-08-14
申请号：US15235745
申请日：2016-08-12
Applicant: MEDIATEK INC.
Inventor： Chien-Hwa Hwang , Yi-Ju Liao , Tsang-Wei Yu , Lung-Sheng Tsai , Pei-Kai Liao
IPC: H04W72/04 , H04B7/04 , H04L5/00 , H04B7/0452 , H04L27/34
Abstract: A method of modulating and demodulating superposed signals for MUST scheme is proposed. A transmitter takes bit sequences intended for multiple receivers under MUST scheme to go through a “bit sequence to constellation points” mapper before entering the modulators to satisfy the Gray coding rule and to achieve high demodulation performance for the receivers. In a first method, each bit sequence is assigned for each constellation point on the constellation map to satisfy one or more conditions under different power split factors. In a second method, the constellation map is divided into sub-regions according to the clustering of the constellation points for bit sequence assignment. A near-UE may use an ML receiver for demodulation and decoding the superposed signal. A far-UE may use an ML receiver or an MMSE receiver for demodulation and decoding the superposed signal.
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公开(公告)号：US20180227888A1
公开(公告)日：2018-08-09
申请号：US15888256
申请日：2018-02-05
Applicant: Mediatek Inc.
Inventor： Chien Hwa Hwang , Pei-Kai Liao , Wei-De Wu
CPC classification number: H04W72/042 , H04L1/0045 , H04L1/0061 , H04L1/0072 , H04L5/0007 , H04L5/0037 , H04L5/0048 , H04L5/0055 , H04W72/1289 , H04W88/08
Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The first UE receives data bits representing downlink control information from a base station. The first UE also determines a first set of bits of the data bits. The first set of bits indicates whether the received data bits include G sets of bits representing downlink control information directed to one or more UEs, G being an integer greater than 1. The first UE further processes at least one set of bits of the G sets of bits to obtain downlink control information directed to the first UE when the data bits include the G sets of bits.
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公开(公告)号：US20180199311A1
公开(公告)日：2018-07-12
申请号：US15862895
申请日：2018-01-05
Applicant: MediaTek Inc.
Inventor： Weidong Yang , Chien-Hwa Hwang , Pei-Kai Liao
Abstract: Various solutions for alert signal design with respect to user equipment and network apparatus in mobile communications are described. A first node of a wireless network may transmit an alert signal to a second node of the wireless network. The first node may further perform a mini-slot transmission to the second node. The alert signal indicates presence of the mini-slot transmission. The first node may also receive an alert signal from the second node. The first node may further detect a mini-slot transmission according to the alert signal and receive the mini-slot transmission from the second node.
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