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    • 2. 发明申请
    • CHANNEL INTERLEAVER HAVING A CONSTELLATION-BASED BLOCK-WISE PERMUATION MODULE
    • 具有基于智能化的块式智能模块的信道交换
    • WO2010075804A1
    • 2010-07-08
    • PCT/CN2009/076334
    • 2009-12-31
    • MEDIATEK INC.WU, Ciou-PingLIAO, Pei-KaiCHANG, Yu-HaoCHEN, Yih-Shen
    • WU, Ciou-PingLIAO, Pei-KaiCHANG, Yu-HaoCHEN, Yih-Shen
    • H04B7/02
    • H04L1/0066H04L1/0042H04L1/0071H04L27/34
    • ABSTRACT A channel interleaver comprises a novel constellation-based permutation module. The channel interleaver first receives a plurality of sets of encoded bits generated from an FEC encoder. The encoded bits are distributed into multiple 5 subblocks and each subblock comprises a plurality of adjacent bits. A subblock interleaver interleaves each subblock and outputs a plurality of interleaved bits. The constellation-based permutation module rearranges the interleaved bits and outputs a plurality of rearranged bits. The rearranged bits are supplied to a symbol mapper such that a plurality of consecutively encoded bits in the same set 10 of the encoded bits generated from the FEC encoder is prevented to be mapped onto the same level of bit reliability of a modulation symbol. In addition, the plurality of adjacent bits of each subblock is also prevented to be mapped onto the same level of bit reliability to achieve constellation diversity and to improve decoding performance. 15 20
    • 摘要信道交织器包括基于星座的新的置换模块。 信道交织器首先接收从FEC编码器生成的多组编码比特。 编码的比特被分配到多个5个子块中,并且每个子块包括多个相邻的比特。 子块交织器交织每个子块并输出多个交织比特。 基于星座的置换模块重新排列交织的比特并输出多个重新排列的比特。 重新排列的比特被提供给符号映射器,使得从FEC编码器生成的编码比特的相同组10中的多个连续编码比特被阻止被映射到调制符号的相同级别的比特可靠性。 此外,还防止了每个子块的多个相邻位被映射到相同级别的比特可靠性以实现星座分集并提高解码性能。 15 20
    • 3. 发明申请
    • SOUNDING MECHANISM UNDER CARRIER AGGREGATION
    • 承运人聚集的声音机制
    • WO2011157237A1
    • 2011-12-22
    • PCT/CN2011/075966
    • 2011-06-20
    • MEDIATEK INC.LIN, Chih-YuanCHANG, Yu-Hao
    • LIN, Chih-YuanCHANG, Yu-Hao
    • H04W72/04
    • H04L5/0048H04L5/001H04L5/0091H04W72/042
    • Sounding mechanism for LTE-A systems under carrier aggregation is provided. A UE receives an uplink or downlink grant transmitted from an eNB over a primary carrier in a multi- carrier LTE-A system. The UE determines indicated carrier(s) and detects a triggering condition for aperiodic sounding transmission in the grant. The UE then selects UE-specific sounding reference signal (SRS) parameters. Finally, the UE transmits an aperiodic SRS (ap- SRS) over the indicated carrier(s) using the selected UE-specific SRS parameters. In one embodiment, the uplink or downlink grant is transmitted via a PDCCH carrying various DCI formats. Each DCI format contains a carrier indicator field (CIF) that indicates which carrier is used for ap-SRS transmission if cross-carrier scheduling is enabled. In another embodiment, DCI format 3/3A is transmitted via a PDCCH carrying a plurality of information fields, each field indicates if the UE should enable ap-SRS in a particular carrier.
    • 提供了载波聚合下LTE-A系统的探测机制。 UE在多载波LTE-A系统中通过主载波接收从eNB发送的上行链路或下行链路许可。 UE确定指示的载波并且在授权中检测用于非周期性探测传输的触发条件。 然后,UE选择UE特定的探测参考信号(SRS)参数。 最后,UE使用所选择的UE专用SRS参数在所指示的载波上发送非周期SRS(ap-SRS)。 在一个实施例中,经由载有各种DCI格式的PDCCH发送上行链路或下行链路许可。 每个DCI格式包含载波指示符字段(CIF),其指示如果启用了跨载波调度,则将哪个载波用于ap-SRS传输。 在另一个实施例中,经由载有多个信息字段的PDCCH发送DCI格式3 / 3A,每个字段指示UE是否应该在特定载波中启用ap-SRS。
    • 4. 发明申请
    • PREAMBLE PARTITION AND CELL IDENTIFICATION PROCEDURE IN WIRELESS COMMUNICATION SYSTEMS
    • 无线通信系统中的前置分区和小区识别程序
    • WO2011003350A1
    • 2011-01-13
    • PCT/CN2010/075026
    • 2010-07-07
    • MEDIATEK INC.CHANG, Yu-HaoCHEN, Yih-ShenLIAO, Pei-Kai
    • CHANG, Yu-HaoCHEN, Yih-ShenLIAO, Pei-Kai
    • H04W48/10H04W48/20
    • H04W48/20
    • Two preamble partition schemes are provided for flexible network deployment and efficient utilization of limited cell identification resources in a wireless network. In a soft partition scheme, the entire preamble sequences are partitioned into several configurable non-overlapping subsets, and each subset is associated with a corresponding cell type. In a hybrid partition scheme, a combination of fixed and configurable subsets is used for preamble partition. The partitioning information is carried in a broadcasting channel broadcasted from base stations to mobile stations. In one embodiment, after a mobile station performs scanning and synchronization with a first base station, it derives the cell type of the first base station from cell identification and partitioning information. The mobile station completes ranging and network entry with the first base station if the cell type is preferred, and starts to perform scanning and synchronization with a second base station if the cell type is non-preferred.
    • 提供两个前导码分区方案用于无线网络中的有限小区标识资源的灵活网络部署和有效利用。 在软分区方案中,将整个前导码序列划分成若干可配置的非重叠子集,并且每个子集与相应的小区类型相关联。 在混合分区方案中,固定和可配置子集的组合用于前导码分区。 分区信息在从基站广播的广播信道中携带到移动台。 在一个实施例中,在移动台与第一基站执行扫描和同步之后,它从小区识别和分区信息中导出第一基站的小区类型。 如果小区类型是优选的,则移动台完成与第一基站的测距和网络入口,并且如果小区类型是不优选的,则开始执行与第二基站的扫描和同步。
    • 5. 发明申请
    • SYNCHRONIZATION CHANNEL FOR ADVANCED WIRELESS OFDM/OFDMA SYSTEMS
    • 用于高级无线OFDM / OFDMA系统的同步信道
    • WO2010075806A1
    • 2010-07-08
    • PCT/CN2009/076346
    • 2009-12-31
    • MEDIATEK INC.LIAO, Pei-KaiCHANG, Yu-HaoWU, Kuo-Ming
    • LIAO, Pei-KaiCHANG, Yu-HaoWU, Kuo-Ming
    • H04W56/00
    • H04L5/005H04L27/2601H04W56/0015H04W72/04
    • A hierarchical downlink (DL) synchronization channel (SCH) is provided for wireless OFDM/OFDMA systems. The SCH includes a Primary SCH (P-SCH) for carrying PA-Preambles used for coarse timing and frequency synchronization, and a Secondary SCH (S-SCH) for carrying SA-Preambles used for cell ID detection. The total time length occupied by P-SCH and S-SCH is equal to one OFDM symbol time length of a data channel, and S-SCH is located in front of P-SCH in each DL frame. A perfect multi-period time-domain structure is created and maintained in P-SCH to increase preciseness of frame boundary estimation. With overlapping deployment of macrocells and femtocells, a predefined SCH configuration scheme is provided to separate frequency subbands used for macrocells and femtocells such that interferences in S-SCH can be mitigated. In addition, a self-organized SCH configuration scheme is provided to allow more flexibility for femtocells to avoid or introduce interference in S-SCH.
    • 为无线OFDM / OFDMA系统提供分层下行链路(DL)同步信道(SCH)。 SCH包括用于携带用于粗定时和频率同步的PA前导的主SCH(P-SCH)和用于携带用于小区ID检测的SA-前导的辅SCH(S-SCH)。 由P-SCH和S-SCH占用的总时间长度等于数据信道的一个OFDM符号时间长度,并且S-SCH位于每个DL帧中的P-SCH前面。 在P-SCH中创建并保持了完美的多周期时域结构,以增加帧边界估计的精确度。 通过宏单元和毫微微小区的重叠部署,提供预定义的SCH配置方案来分离用于宏小区和毫微微小区的频率子带,使得可以减轻S-SCH中的干扰。 另外,提供了自组织的SCH配置方案,以允许毫微微小区更灵活地避免或引入S-SCH中的干扰。
    • 6. 发明申请
    • UPLINK POWER CONTROL MESSAGE DESIGN IN WIRELESS OFDMA SYSTEMS
    • 无线OFDMA系统中的UPLINK功率控制消息设计
    • WO2011097925A1
    • 2011-08-18
    • PCT/CN2010/080066
    • 2010-12-21
    • MEDIATEK INC.CHANG, Yu-HaoCHEN, Yih-Shen
    • CHANG, Yu-HaoCHEN, Yih-Shen
    • H04W52/16H04W52/26
    • H04W52/54H04W52/146H04W52/241H04W52/42
    • A method of uplink power control in a wireless OFDMA system is provided. A serving base station first configures a fast feedback channel by transmitting a feedback allocation message to a mobile station. The mobile station then reports downlink channel information via the allocated fast feedback channel. Based on the reported downlink channel information, the serving base station estimates uplink channel quality and thereby detects a channel variation and generates an uplink power adjustment message that delivers a power offset to adjust the transmitting power level of the mobile station. In one novel aspect, the uplink power adjustment message also comprises feedback allocation information that re-configures the fast feedback channel without extra signaling overhead. In addition, the novel power adjustment message eliminates redundant information such that it is transmitted via a minimum resource unit without requiring extra resource.
    • 提供了一种在无线OFDMA系统中的上行链路功率控制的方法。 服务基站首先通过向移动台发送反馈分配消息来配置快速反馈信道。 移动台然后经由分配的快速反馈信道报告下行链路信道信息。 基于所报告的下行链路信道信息,服务基站估计上行链路信道质量,从而检测信道变化,并产生传递功率偏移以调整移动台的发射功率电平的上行链路功率调整消息。 在一个新颖的方面,上行链路功率调整消息还包括重新配置快速反馈信道而没有额外的信令开销的反馈分配信息。 另外,新的功率调整消息消除了冗余信息,使得它经由最小资源单元被传输,而不需要额外的资源。
    • 7. 发明申请
    • LOW LATENCY SYNCHRONIZATION SCHEME FOR WRIELESS OFDMA SYSTEMS
    • 用于无线OFDMA系统的低延迟同步方案
    • WO2010108393A1
    • 2010-09-30
    • PCT/CN2010/070119
    • 2010-01-11
    • MEDIATEK INC.CHANG, Yu-HaoLIAO, Pei-Kai
    • CHANG, Yu-HaoLIAO, Pei-Kai
    • H04L27/26
    • H04L5/0053H04L27/2602H04L27/2656H04W56/00
    • In advanced wireless OFDMA communication systems, hierarchical synchronization is adopted to synchronize between a base station (BS) and a mobile station (MS). In a hierarchical synchronization architecture, primary advanced preamble (PA-Preamble) is used for coarse time domain synchronization while cell ID is detected using several accumulated secondary advanced preambles (SA-Preambles). Network entry latency can be reduced by adjusting the relative location of superframe header (SFH), PA-Preamble and SA-Preambles within a superframe. Three different synchronization channel (SCH) architectures are proposed to provide different tradeoffs between network entry latency and the robustness of SA-Preamble design and cell ID detection.
    • 在先进的无线OFDMA通信系统中,采用分层同步来在基站(BS)和移动台(MS)之间进行同步。 在分层同步架构中,主要的高级前同步码(PA-Preamble)用于粗略的时域同步,同时使用几个累加的辅助高级前导码(SA-前导码)来检测小区ID。 可以通过调整超帧中的超帧头(SFH),PA前导码和SA-前导码的相对位置来减少网络进入延迟。 提出了三种不同的同步信道(SCH)架构,以提供网络入口延迟与SA-前导码设计和小区ID检测的鲁棒性之间的不同权衡。
    • 8. 发明申请
    • METHODS FOR CARRIER AGGREGATION
    • 载体聚集方法
    • WO2011120448A1
    • 2011-10-06
    • PCT/CN2011/072431
    • 2011-04-02
    • MEDIATEK INC.HSU, Chia-ChunCHEN, Yih-ShenCHANG, Yu-HaoFU, I-Kang
    • HSU, Chia-ChunCHEN, Yih-ShenCHANG, Yu-HaoFU, I-Kang
    • H04W24/10
    • H04W24/10H04L5/0096H04L5/0098H04W52/365H04W72/1284H04W72/14
    • Methods to manage multiple component carriers (CCs) efficiently in a mobile network with carrier aggregation (CA) enabled are proposed. For CC activation/deactivation, a single LCID value is used to represent both activation and deactivation command. A single command with multiple instructions is provided to activate and/or deactivate multiple CCs. In addition, unnecessary re-activation or re-inactivation of a CC is prevented, and explicit feedback for activation/deactivation is considered. For scheduling mechanism, a novel buffer status reporting (BSR) procedure is provided, where only one BSR is calculated after preparing all the transport blocks (TB) within one transmission time interval (TTI). Novel power headroom reporting (PHR) format and trigger are also provided. For DL-UL linking, various linking types are created based on whether there is carrier indicator field (CIF) in DL grant or UL grant. The various linking types are used in different applications to improve scheduling flexibility and load balancing.
    • 提出了在启用载波聚合(CA)的移动网络中有效管理多分量载波(CC)的方法。 对于CC激活/去激活,单个LCID值用于表示激活和停用命令。 提供具有多个指令的单个命令来激活和/或去激活多个CC。 另外,不必要地重新激活或重新激活CC,并且考虑了激活/去激活的显式反馈。 对于调度机制,提供了一种新的缓冲状态报告(BSR)过程,其中在一个传输时间间隔(TTI)中准备所有传输块(TB)之后仅计算一个BSR。 还提供了新的功率余量报告(PHR)格式和触发。 对于DL-UL链接,基于在DL授权或UL授权中是否存在载波指示符字段(CIF)来创建各种链接类型。 各种链接类型用于不同的应用程序,以提高调度灵活性和负载均衡。
    • 9. 发明申请
    • UPLINK POWER CONTROL MESSAGE INDEXING IN WIRELESS OFDMA SYSTEMS
    • 无线OFDMA系统上行电源控制消息索引
    • WO2011097922A1
    • 2011-08-18
    • PCT/CN2010/079926
    • 2010-12-17
    • MEDIATEK INC.CHANG, Yu-HaoCHEN, Yih-Shen
    • CHANG, Yu-HaoCHEN, Yih-Shen
    • H04W52/00
    • H04W52/146H04W52/241
    • A method of power control message indexing is provided in a wireless Orthogonal Frequency Division Multiple Access (OFDMA) network. A base station configures fast feedback channels (FFBCHs) and mobile stations report downlink channel information via the configured FFBCHs. Based on the received channel information, the base station estimates uplink channel quality and detects any channel variation. In response to uplink channel variation, the base station delivers power offsets to adjust the transmit power levels of the mobile stations. In one advantageous aspect, the power control commands for mobile stations are aggregated and the indexing scheme of the power control commands is implicitly based on the configured FFBCHs. For example, if a FFBCH is located at a first location in an uplink frame, then a following power control command in response to the FFBCH is located at a second location in a downlink frame, the second location is located after the first location with a predefined fixed delay time.
    • 在无线正交频分多址(OFDMA)网络中提供功率控制消息索引的方法。 基站配置快速反馈信道(FFBCH),移动台通过配置的FFBCHs报告下行链路信道信息。 基于所接收的信道信息,基站估计上行信道质量并检测任何信道变化。 响应于上行链路信道变化,基站提供功率偏移以调整移动站的发射功率电平。 在一个有利的方面,用于移动站的功率控制命令被聚合,并且功率控制命令的索引方案隐含地基于配置的FFBCH。 例如,如果FFBCH位于上行链路帧中的第一位置,则响应于FFBCH的后续功率控制命令位于下行链路帧中的第二位置,则第二位置位于第一位置之后, 预定义的固定延迟时间。