The Experts below are selected from a list of 324 Experts worldwide ranked by ideXlab platform

Kazuaki Takeda - One of the best experts on this subject based on the ideXlab platform.

  • VTC Spring - Search Space Design in Enhanced Physical Downlink Control Channel for LTE-Advanced
    2013 IEEE 77th Vehicular Technology Conference (VTC Spring), 2013
    Co-Authors: Mu Qin, Liu Liu, Lan Chen, Kazuaki Takeda
    Abstract:

    In Long Term Evolution- Advanced (LTE-A) Release 11, an enhanced physical Downlink Control Channel (ePDCCH)was introduced to increase the capacity of the physical Downlink Control Channel (PDCCH), in order to support Multiple User-Multiple Input Multiple Output (MU-MIMO) and interference mitigation in heterogeneous networks. Design of the search space, in which Control information is mapped, for the ePDCCH is an essential issue. Conventional search space designs suffer from low resource utilization efficiency and a high blocking probability. This paper presents a novel search space design. The proposed design introduces proper resource division in conjunction with a search space split. Simulation results show that the proposed design effectively improves the resource utilization efficiency and reduces the blocking probability.

  • WCNC - Search space design of enhanced physical Downlink Control Channel for long term evolution advanced system
    2013 IEEE Wireless Communications and Networking Conference (WCNC), 2013
    Co-Authors: Liu Liu, Mu Qin, Kazuaki Takeda, Lan Chen
    Abstract:

    This paper focuses on investigating the search space design of Enhanced Physical Downlink Control Channel (EPD-CCH), which is introduced in Long Term Evolution-Advanced (LTE-A) system to increase the capacity of the Downlink Control Channel. Since EPDCCH is frequency-division-multiplexed with Downlink data Channel, resource utilization efficiency is a very important issue in addition to blocking probability. This paper proposes the innovative methods of locating the search spaces of EPDCCH with different transmission schemes, i.e. distributed transmission and localized transmission, considering the UE complexity, the capacity of Control Channel and the impacts on Physical Downlink Shared Channel (PDSCH). By simulation results, it is proven that the proposed methods could get higher resource utilization and lower blocking probability while maintain the same UE complexity in blind decoding.

  • Investigation on Downlink Control Channel Structure Using Cross-Carrier Scheduling for Carrier Aggregation-Based Heterogeneous Network in LTE-Advanced
    IEICE Transactions on Communications, 2011
    Co-Authors: Nobuhiko Miki, Kazuaki Takeda, Yuan Yan, Hidetoshi Kayama
    Abstract:

    Carrier aggregation (CA) is one of the most important techniques for LTE-Advanced because of its capability to support a wide transmission bandwidth of up to 100MHz and heterogeneous networks effectively while achieving backward compatibility with the Release 8 LTE. In order to improve the performance of Control information transmission in heterogeneous networks, cross-carrier scheduling is supported, i.e., Control information on one component carrier (CC) can assign radio resources on another CC. To convey the Control information efficiently, a search space is defined and used in Release 8 LTE. In cross-carrier scheduling, the optimum design for the search space for different CCs is a paramount issue. This paper presents two novel methods for search space design. In the first method using one hash function, a user equipment (UE)-specific offset is introduced among search spaces associated with different CCs. Due to the UE-specific offsets, search spaces of different UEs are staggered and the probability that the search space of one UE is totally overlapped by that of another UE can be greatly reduced. In the second method using multiple hash functions, a novel randomization scheme is proposed to generate independent hash functions for search spaces of different CCs. Because of the perfect randomization effect of the proposed method, search space overlapping of different UEs is reduced. Simulation results show that both the proposed methods effectively reduce the blocking probability of the Control information compared to existing methods.

Lan Chen - One of the best experts on this subject based on the ideXlab platform.

  • VTC Spring - Search Space Design in Enhanced Physical Downlink Control Channel for LTE-Advanced
    2013 IEEE 77th Vehicular Technology Conference (VTC Spring), 2013
    Co-Authors: Mu Qin, Liu Liu, Lan Chen, Kazuaki Takeda
    Abstract:

    In Long Term Evolution- Advanced (LTE-A) Release 11, an enhanced physical Downlink Control Channel (ePDCCH)was introduced to increase the capacity of the physical Downlink Control Channel (PDCCH), in order to support Multiple User-Multiple Input Multiple Output (MU-MIMO) and interference mitigation in heterogeneous networks. Design of the search space, in which Control information is mapped, for the ePDCCH is an essential issue. Conventional search space designs suffer from low resource utilization efficiency and a high blocking probability. This paper presents a novel search space design. The proposed design introduces proper resource division in conjunction with a search space split. Simulation results show that the proposed design effectively improves the resource utilization efficiency and reduces the blocking probability.

  • WCNC - Search space design of enhanced physical Downlink Control Channel for long term evolution advanced system
    2013 IEEE Wireless Communications and Networking Conference (WCNC), 2013
    Co-Authors: Liu Liu, Mu Qin, Kazuaki Takeda, Lan Chen
    Abstract:

    This paper focuses on investigating the search space design of Enhanced Physical Downlink Control Channel (EPD-CCH), which is introduced in Long Term Evolution-Advanced (LTE-A) system to increase the capacity of the Downlink Control Channel. Since EPDCCH is frequency-division-multiplexed with Downlink data Channel, resource utilization efficiency is a very important issue in addition to blocking probability. This paper proposes the innovative methods of locating the search spaces of EPDCCH with different transmission schemes, i.e. distributed transmission and localized transmission, considering the UE complexity, the capacity of Control Channel and the impacts on Physical Downlink Shared Channel (PDSCH). By simulation results, it is proven that the proposed methods could get higher resource utilization and lower blocking probability while maintain the same UE complexity in blind decoding.

Mu Qin - One of the best experts on this subject based on the ideXlab platform.

  • VTC Spring - Search Space Design in Enhanced Physical Downlink Control Channel for LTE-Advanced
    2013 IEEE 77th Vehicular Technology Conference (VTC Spring), 2013
    Co-Authors: Mu Qin, Liu Liu, Lan Chen, Kazuaki Takeda
    Abstract:

    In Long Term Evolution- Advanced (LTE-A) Release 11, an enhanced physical Downlink Control Channel (ePDCCH)was introduced to increase the capacity of the physical Downlink Control Channel (PDCCH), in order to support Multiple User-Multiple Input Multiple Output (MU-MIMO) and interference mitigation in heterogeneous networks. Design of the search space, in which Control information is mapped, for the ePDCCH is an essential issue. Conventional search space designs suffer from low resource utilization efficiency and a high blocking probability. This paper presents a novel search space design. The proposed design introduces proper resource division in conjunction with a search space split. Simulation results show that the proposed design effectively improves the resource utilization efficiency and reduces the blocking probability.

  • WCNC - Search space design of enhanced physical Downlink Control Channel for long term evolution advanced system
    2013 IEEE Wireless Communications and Networking Conference (WCNC), 2013
    Co-Authors: Liu Liu, Mu Qin, Kazuaki Takeda, Lan Chen
    Abstract:

    This paper focuses on investigating the search space design of Enhanced Physical Downlink Control Channel (EPD-CCH), which is introduced in Long Term Evolution-Advanced (LTE-A) system to increase the capacity of the Downlink Control Channel. Since EPDCCH is frequency-division-multiplexed with Downlink data Channel, resource utilization efficiency is a very important issue in addition to blocking probability. This paper proposes the innovative methods of locating the search spaces of EPDCCH with different transmission schemes, i.e. distributed transmission and localized transmission, considering the UE complexity, the capacity of Control Channel and the impacts on Physical Downlink Shared Channel (PDSCH). By simulation results, it is proven that the proposed methods could get higher resource utilization and lower blocking probability while maintain the same UE complexity in blind decoding.

Laurent Martinod - One of the best experts on this subject based on the ideXlab platform.

  • RNTI Aggregation for multi-users multiplexing radio voice transmission for enhancing voice capacity over LTE in PMR context
    2015
    Co-Authors: Hang Nguyen, Eric Georgeaux, Philippe Mege, Cuong Nguyen Manh, Laurent Martinod
    Abstract:

    Voice capacity over Long Term Evolution (LTE), despite the fact that LTE supports high-speed data transmission, is still low due to the large data and Control overhead. This is one of the primary obstacles to apply LTE to Professional Mobile Radio (PMR) system because the voice capacity is one of the main requirements of the public safety network. To overcome this issue, there are several studies aiming at reducing one of the two overheads in LTE, data or Control. However, in most cases the voice capacity gain can only be improved by both reducing data and Control overhead. This is because these two factors are strongly related in carrying out the resource allocation. In [1], we proposed a Multi-users Multiplexing Radio Voice Transmission method. This method clusters voice packets from different users into one same LTE packet in the Downlink transmission for reducing the data overhead caused by the difference between LTE packet size and the PMR voice payload. This paper presents a new Radio Network Temporary Identifier (RNTI) aggregation method to solve the Control overhead issue for the multiplexing scheme of Voice over LTE (VoLTE) in PMR context. Our method uses Physical Downlink Control Channel (PDCCH) Channel with high format, created by the aggregation of PDCCH Channels with low format, to transmit several RNTIs of different User Equipments (UEs) in a same multiplexing group. The number of RNTIs in one PDCCH is calculated to ensure that there is no increase of Bit Error Rate (BER) for receiving PDCCH Channel. The results show that the RNTI aggregation method can increase the Control capacity of the multiplexing scheme up to 170%. The combination of Multi-users Multiplexing Radio Voice Transmission method and RNTI aggregation method allows reducing both data and Control overhead of VoLTE in the PMR context. Index Terms-Aggregation, RNTI, scheduling, LTE, PMR

  • RNTI Aggregation for Multi-Users Multiplexing Radio Voice Transmission for Enhancing Voice Capacity over LTE in PMR Context
    2015 IEEE 81st Vehicular Technology Conference (VTC Spring), 2015
    Co-Authors: Manh-cuong Nguyen, Hang Nguyen, Eric Georgeaux, Philippe Mege, Laurent Martinod
    Abstract:

    International audienceVoice capacity over Long Term Evolution (LTE), despite the fact that LTE supports high-speed data transmission, is still low due to the large data and Control overhead. This is one of the primary obstacles to apply LTE to Professional Mobile Radio (PMR) system because the voice capacity is one of the main requirements of the public safety network. To overcome this issue, there are several studies aiming at reducing one of the two overheads in LTE, data or Control. However, in most cases the voice capacity gain can only be improved by both reducing data and Control overhead. This is because these two factors are strongly related in carrying out the resource allocation. In [1], we proposed a Multi-users Multiplexing Radio Voice Transmission method. This method clusters voice packets from different users into one same LTE packet in the Downlink transmission for reducing the data overhead caused by the difference between LTE packet size and the PMR voice payload. This paper presents a new Radio Network Temporary Identifier (RNTI) aggregation method to solve the Control overhead issue for the multiplexing scheme of Voice over LTE (VoLTE) in PMR context. Our method uses Physical Downlink Control Channel (PDCCH) Channel with high format, created by the aggregation of PDCCH Channels with low format, to transmit several RNTIs of different User Equipments (UEs) in a same multiplexing group. The number of RNTIs in one PDCCH is calculated to ensure that there is no increase of Bit Error Rate (BER) for receiving PDCCH Channel. The results show that the RNTI aggregation method can increase the Control capacity of the multiplexing scheme up to 170%. The combination of Multi-users Multiplexing Radio Voice Transmission method and RNTI aggregation method allows reducing both data and Control overhead of VoLTE in the PMR context. Index Terms-Aggregation, RNTI, scheduling, LTE, PM

  • VTC Spring - RNTI Aggregation for Multi-Users Multiplexing Radio Voice Transmission for Enhancing Voice Capacity over LTE in PMR Context
    2015 IEEE 81st Vehicular Technology Conference (VTC Spring), 2015
    Co-Authors: Manh-cuong Nguyen, Hang Nguyen, Eric Georgeaux, Philippe Mege, Laurent Martinod
    Abstract:

    Voice capacity over Long Term Evolution (LTE), despite the fact that LTE supports high-speed data transmission, is still low due to the large data and Control overhead. This is one of the primary obstacles to apply LTE to Professional Mobile Radio (PMR) system because the voice capacity is one of the main requirements of the public safety network. To overcome this issue, there are several studies aiming at reducing one of the two overheads in LTE, data or Control. However, in most cases the voice capacity gain can only be improved by both reducing data and Control overhead. This is because these two factors are strongly related in carrying out the resource allocation. In [1], we proposed a Multi-users Multiplexing Radio Voice Transmission method. This method clusters voice packets from different users into one same LTE packet in the Downlink transmission for reducing the data overhead caused by the difference between LTE packet size and the PMR voice payload. This paper presents a new Radio Network Temporary Identifier (RNTI) aggregation method to solve the Control overhead issue for the multiplexing scheme of Voice over LTE (VoLTE) in PMR context. Our method uses Physical Downlink Control Channel (PDCCH) Channel with high format, created by the aggregation of PDCCH Channels with low format, to transmit several RNTIs of different User Equipments (UEs) in a same multiplexing group. The number of RNTIs in one PDCCH is calculated to ensure that there is no increase of Bit Error Rate (BER) for receiving PDCCH Channel. The results show that the RNTI aggregation method can increase the Control capacity of the multiplexing scheme up to 170%. The combination of Multi-users Multiplexing Radio Voice Transmission method and RNTI aggregation method allows reducing both data and Control overhead of VoLTE in the PMR context.

Liu Liu - One of the best experts on this subject based on the ideXlab platform.

  • WPMC - A new physical Downlink Control Channel design for MTC in LTE-advanced
    2014 International Symposium on Wireless Personal Multimedia Communications (WPMC), 2014
    Co-Authors: Liu Liu, Huiling Jiang, Shinpei Yasukawa
    Abstract:

    Coverage enhancement is important to support and broaden the application of the machine type communication( MTC) in long term evolution (LTE). Coverage enhancement for physical Downlink Control Channel(PDCCH) is one key issue. A new compact PDCCH for MTC was widely proposed to provide coverage enhancement gain. However, due to the inclusion of cyclic redundancy check(CRC) sequence, the coverage enhancement gain provided by compact PDCCH is restricted. To overcome this bottleneck, a smart CRC processing on the top of compact PDCCH is investigated to facilitate the coverage enhancement in this paper. Theoretical analysis and link level simulation is performed to verify the effectiveness. It is observed that the coverage enhancement gain could be improved by 13.8 % with the proposed CRC processing manner. Besides, another benefit brought by proposed CRC handling is largely reducing the false alarm risk.

  • VTC Spring - Search Space Design in Enhanced Physical Downlink Control Channel for LTE-Advanced
    2013 IEEE 77th Vehicular Technology Conference (VTC Spring), 2013
    Co-Authors: Mu Qin, Liu Liu, Lan Chen, Kazuaki Takeda
    Abstract:

    In Long Term Evolution- Advanced (LTE-A) Release 11, an enhanced physical Downlink Control Channel (ePDCCH)was introduced to increase the capacity of the physical Downlink Control Channel (PDCCH), in order to support Multiple User-Multiple Input Multiple Output (MU-MIMO) and interference mitigation in heterogeneous networks. Design of the search space, in which Control information is mapped, for the ePDCCH is an essential issue. Conventional search space designs suffer from low resource utilization efficiency and a high blocking probability. This paper presents a novel search space design. The proposed design introduces proper resource division in conjunction with a search space split. Simulation results show that the proposed design effectively improves the resource utilization efficiency and reduces the blocking probability.

  • WCNC - Search space design of enhanced physical Downlink Control Channel for long term evolution advanced system
    2013 IEEE Wireless Communications and Networking Conference (WCNC), 2013
    Co-Authors: Liu Liu, Mu Qin, Kazuaki Takeda, Lan Chen
    Abstract:

    This paper focuses on investigating the search space design of Enhanced Physical Downlink Control Channel (EPD-CCH), which is introduced in Long Term Evolution-Advanced (LTE-A) system to increase the capacity of the Downlink Control Channel. Since EPDCCH is frequency-division-multiplexed with Downlink data Channel, resource utilization efficiency is a very important issue in addition to blocking probability. This paper proposes the innovative methods of locating the search spaces of EPDCCH with different transmission schemes, i.e. distributed transmission and localized transmission, considering the UE complexity, the capacity of Control Channel and the impacts on Physical Downlink Shared Channel (PDSCH). By simulation results, it is proven that the proposed methods could get higher resource utilization and lower blocking probability while maintain the same UE complexity in blind decoding.