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    Signal Modulation and Demodulation for Multiuser Superposition Transmission scheme
    3.
    发明申请
    Signal Modulation and Demodulation for Multiuser Superposition Transmission scheme 审中-公开
    多用户叠加传输方案的信号调制解调

    公开(公告)号：US20170048840A1

    公开(公告)日：2017-02-16

    申请号：US15235695

    申请日：2016-08-12

    Applicant: MEDIATEK INC.

    Inventor： Chien-Hwa Hwang ,  Yi-Ju Liao ,  Tsang-Wei Yu ,  Lung-Sheng Tsai ,  Tze-Ping Low ,  Pei-Kai Liao

    IPC: H04W72/04 ,  H04L5/00

    CPC classification number: H04L27/3488 ,  H04J11/0046 ,  H04L5/0046 ,  H04L27/3483

    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.

    Abstract translation: 提出了一种用于MUST方案调制和解调叠加信号的方法。 发射机采用MUST方案下的多个接收机的比特序列，在进入调制器之前通过“位序列到星座点”映射器，以满足格雷编码规则并实现接收机的高解调性能。 在第一种方法中，为星座图上的每个星座点分配每个比特序列以满足不同功率分割因子下的一个或多个条件。 在第二种方法中，星座图根据用于比特序列分配的星座点的聚类被划分成子区域。 近UE可以使用ML接收机来对叠加信号进行解调和解码。 远端UE可以使用ML接收机或MMSE接收机对叠加信号进行解调和解码。

    Soft Buffer Partition for Superposition Coding
    6.
    发明申请
    Soft Buffer Partition for Superposition Coding 有权
    用于叠加编码的软缓冲区分区

    公开(公告)号：US20160192383A1

    公开(公告)日：2016-06-30

    申请号：US14980867

    申请日：2015-12-28

    Applicant: MEDIATEK INC.

    Inventor： Chien-Hwa Hwang ,  Yi-Ju Liao ,  Tze-Ping Low ,  Lung-Sheng Tsai

    IPC: H04W72/12 ,  H04W72/04 ,  H04L1/18

    CPC classification number: H04L1/1812 ,  H04L1/0067 ,  H04L1/1822 ,  H04L1/1845 ,  H04L1/1896 ,  H04L5/001 ,  H04L5/0023 ,  H04L5/0053 ,  H04L5/0069 ,  H04L5/14 ,  H04W28/065 ,  H04W28/22 ,  H04W52/243 ,  H04W52/262 ,  H04W52/267 ,  H04W72/12 ,  H04W72/1252

    Abstract: When the codeword level interference cancellation (CW-IC) is used at the receiver in conjunction with the superposition coding scheme at the transmitter, it is helpful if the soft buffer at the receiver is reserved not only for the desired transport blocks (TBs) but also for the interfering TBs handled by the CW-IC. In so doing, the soft channel bits of interfering TBs at multiple (re)transmissions can be combined to enhance the success rate of data decoding. A soft buffer partition method for the soft channel bits of the desired and interfering TBs in the superposition coding scheme is proposed. The proposed method has a full flexibility in adjusting the soft buffer sizes for the desired and interfering TBs.

    Abstract translation: 当在发射机处结合重叠编码方案在接收机处使用码字电平干扰消除（CW-IC）时，如果在接收机处的软缓冲器不仅被保留在期望的传输块（TB），而且 也用于CW-IC处理的干扰性TB。 在这样做时，可以组合多个（重新）传输的干扰TB的软信道比特以提高数据解码的成功率。 提出了一种用于叠加编码方案中期望和干扰TB的软信道比特的软缓冲区分割方法。 所提出的方法在调整所需和干扰TB的软缓冲区大小方面具有完全的灵活性。

    Method of Enhanced Connection Recovery and Cell Selection
    7.
    发明申请
    Method of Enhanced Connection Recovery and Cell Selection 有权
    增强连接恢复和小区选择的方法

    公开(公告)号：US20150245407A1

    公开(公告)日：2015-08-27

    申请号：US14706967

    申请日：2015-05-08

    Applicant: MEDIATEK INC.

    Inventor： Per Johan Mikael Johansson ,  Yih-Shen Chen ,  Tze-Ping Low ,  William Plumb

    IPC: H04W76/02 ,  H04W48/00

    CPC classification number: H04W76/19 ,  H04W36/0033 ,  H04W36/0055 ,  H04W36/0061 ,  H04W36/0072 ,  H04W36/08 ,  H04W36/24 ,  H04W40/36 ,  H04W48/17 ,  H04W76/18

    Abstract: An enhanced connection recovery upon lost RRC connection due to radio link failure (RLF) or handover failure (HOF) is proposed. A UE first establishes an RRC connection in a source cell in a mobile communication network. Later on, the UE detects a failure event and starts an RRC reestablishment procedure in a target cell to restore the RRC connection. In a first novel aspect, a fast RLF process is applied to reduce the outage time in the serving cell. In a second novel aspect, an enhanced cell selection mechanism based on cell prioritization information is applied to reduce the outage time in the target cell. In one embodiment, multi-RAT registration is used to steer cell selection.

    Abstract translation: 提出了由于无线链路故障（RLF）或切换失败（HOF）引起的丢失的RRC连接的增强的连接恢复。 UE首先在移动通信网络中的源小区中建立RRC连接。 之后，UE检测故障事件，并在目标小区中开始RRC重建过程，以恢复RRC连接。 在第一新颖方面，应用快速RLF处理来减少服务小区中的停机时间。 在第二个新颖的方面，应用基于小区优先级信息的增强小区选择机制来减少目标小区中断时间。 在一个实施例中，多RAT注册用于引导小区选择。

    Method of enhanced connection recovery and cell selection
    8.
    发明授权
    Method of enhanced connection recovery and cell selection 有权
    增强连接恢复和小区选择的方法

    公开(公告)号：US09049698B2

    公开(公告)日：2015-06-02

    申请号：US13743612

    申请日：2013-01-17

    Applicant: Mediatek, Inc.

    Inventor： Per Johan Mikael Johansson ,  Yih-Shen Chen ,  Tze-Ping Low ,  William Plumb

    IPC: H04W36/24 ,  H04W76/02 ,  H04W36/08 ,  H04W36/00

    CPC classification number: H04W76/19 ,  H04W36/0033 ,  H04W36/0055 ,  H04W36/0061 ,  H04W36/0072 ,  H04W36/08 ,  H04W36/24 ,  H04W40/36 ,  H04W48/17 ,  H04W76/18

    Abstract: An enhanced connection recovery upon lost RRC connection due to radio link failure (RLF) or handover failure (HOF) is proposed. A UE first establishes an RRC connection in a source cell in a mobile communication network. Later on, the UE detects a failure event and starts an RRC reestablishment procedure in a target cell to restore the RRC connection. In a first novel aspect, a fast RLF process is applied to reduce the outage time in the serving cell. In a second novel aspect, an enhanced cell selection mechanism based on cell prioritization information is applied to reduce the outage time in the target cell. In one embodiment, multi-RAT registration is used to steer cell selection.

    Abstract translation: 提出了由于无线链路故障（RLF）或切换失败（HOF）引起的丢失的RRC连接的增强的连接恢复。 UE首先在移动通信网络中的源小区中建立RRC连接。 之后，UE检测故障事件，并在目标小区中开始RRC重建过程，以恢复RRC连接。 在第一新颖方面，应用快速RLF处理来减少服务小区中的停机时间。 在第二个新颖的方面，应用基于小区优先级信息的增强小区选择机制来减少目标小区中断时间。 在一个实施例中，多RAT注册用于引导小区选择。

    Method of Enhanced Connection Recovery and Loss-Less DATA Recovery
    10.
    发明申请
    Method of Enhanced Connection Recovery and Loss-Less DATA Recovery 有权
    增强连接恢复和丢失数据恢复的方法

    公开(公告)号：US20150245405A1

    公开(公告)日：2015-08-27

    申请号：US14709479

    申请日：2015-05-12

    Applicant: MEDIATEK INC.

    Inventor： Per Johan Mikael Johansson ,  Yih-Shen Chen ,  Tze-Ping Low ,  William Plumb

    IPC: H04W76/02 ,  H04W36/00 ,  H04W40/36

    CPC classification number: H04W76/19 ,  H04W36/0033 ,  H04W36/0055 ,  H04W36/0061 ,  H04W36/0072 ,  H04W36/08 ,  H04W36/24 ,  H04W40/36 ,  H04W48/17 ,  H04W76/18

    Abstract: An enhanced connection recovery upon lost RRC connection due to radio link failure (RLF) or handover failure (HOF) is proposed. A UE first establishes an RRC connection in a source cell in a mobile communication network. Later on, the UE detects a failure event and starts an RRC reestablishment procedure in a target cell to restore the RRC connection. In a first novel aspect, a fast NAS recovery process is applied to reduce the outage time in the target cell. In a second novel aspect, context fetching is used to reduce the outage time in the target cell. In a third novel aspect, a loss-less reestablishment procedure is proposed to reduce data loss during the connection recovery.

    Abstract translation: 提出了由于无线链路故障（RLF）或切换失败（HOF）引起的丢失的RRC连接的增强的连接恢复。 UE首先在移动通信网络中的源小区中建立RRC连接。 之后，UE检测故障事件，并在目标小区中开始RRC重建过程，以恢复RRC连接。 在第一个新颖的方面，应用快速的NAS恢复过程来减少目标小区中的停电时间。 在第二个新颖的方面，使用上下文获取来减少目标小区中的停机时间。 在第三个新颖的方面，提出了一种无损重建过程，以减少连接恢复期间的数据丢失。

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