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Dominic Michael Tolli

Bio: Dominic Michael Tolli is an academic researcher from Motorola. The author has contributed to research in topics: Communications protocol & Collision avoidance. The author has an hindex of 5, co-authored 6 publications receiving 386 citations.

Papers
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Proceedings ArticleDOI
16 May 2010
TL;DR: This paper provides an overview of carrier aggregation and discusses major technical issues including aggregation structure, scenarios, implementation, control signalling design and coexistence with legacy LTE systems.
Abstract: UMTS LTE system can support flexible bandwidth configuration up to 20 MHz. Currently, system enhancements are being considered to provide substantial improvements to LTE and allow it to meet or exceed IMT-Advanced requirements. One key enhancement feature is bandwidth extension via carrier aggregation to support deployment bandwidth up to 100 MHz. This will allow peak target data rates in excess of 1 Gbps in the downlink and 500 Mbps in the uplink to be achieved. Carrier aggregation is attractive because it allows operators to deploy a system with larger bandwidth by aggregating several smaller contiguous or non-contiguous carriers while providing backward compatibility to legacy users. For instance, an 80MHz system can be constructed using contiguous or non-contiguous 4×20MHz component carriers. Legacy users can then access the system using one of the component carriers. This paper provides an overview of carrier aggregation and discusses major technical issues including aggregation structure, scenarios, implementation, control signalling design and coexistence with legacy LTE systems.

248 citations

Patent
20 Feb 1998
TL;DR: In this article, a method and apparatus for efficiently communicating complex resource allocations from a central access point or base unit (14) to a mobile unit (10) requesting service is presented.
Abstract: The present invention encompasses a method and apparatus for efficiently communicating complex resource allocations from a central access point or base unit (14) to a mobile unit (10) requesting service. The base unit (14) allocates these resources amongst several competing mobile units (10-12) performing a variety of applications. As such, it is often desirable to generate a complex schedule to achieve the optimum assignment providing the highest quality of service to mobile units (10-12). By communicating the complex schedule of uplink resources in one downlink transfer, the mobile unit (10) is free to transmit its data on the uplink without simultaneously receiving the downlink, reducing its complexity significantly.

90 citations

Patent
11 Oct 2007
TL;DR: In this paper, a method for collision avoidance using sleep frames (720) is proposed. But the method can also include the step of arranging (640) transmissions of the Bluetooth communication to avoid collisions with transmissions of 802.16 communication.
Abstract: The invention concerns a method (600) and device (100) for collision avoidance using sleep frames (720). The method can include the step of - in a multi-mode device (100) - conducting (630) a communication in accordance with an 802.16 communications protocol in which the 802.16 communication protocol communication includes both listening frames (710) and sleep frames. The method can also include the step of conducting (640) in the multi-mode device another communication in accordance with a Bluetooth communications protocol that supports extended synchronous connection-oriented mode. The method can also include the step of arranging (640) transmissions of the Bluetooth communication to avoid collisions with transmissions of the 802.16 communication.

17 citations

Patent
12 Oct 2007
TL;DR: In this paper, the authors proposed a method for collision avoidance in 802.16 communications protocol in which listening frames are only listening frames (530) and a Bluetooth communication protocol that supports extended synchronous connection-oriented mode (ESO mode).
Abstract: The invention concerns a method (600) and device (100) for collision avoidance. The method can include the step of - in a multi-mode device (100) - conducting (630) a communication in accordance with an 802.16 communications protocol in which the 802.16 communication protocol communication includes only listening frames (530). The method can also include the step of conducting (640) in the multi-mode device another communication in accordance with a Bluetooth communications protocol that supports extended synchronous connection-oriented mode. The method can also include the step of arranging (640) transmissions of the Bluetooth communication to avoid collisions with transmissions of the 802.16 communication.

15 citations

Proceedings ArticleDOI
25 Jul 1995
TL;DR: In this paper, a 500 kbps, highmobility, personal communication system (PCS) employing slow frequency hopping (SFH) and time-division multiple access is investigated for the 1.8 GHz band.
Abstract: A 500 kbps, high-mobility, personal communication system (PCS) employing slow frequency hopping (SFH) and time-division multiple access is investigated for the 1.8 GHz band. In order to verify the concepts which drove the system design and to characterize the SFH propagation environment, extensive field tests have been conducted with the prototype units. This paper summarizes the findings and draws conclusions on the effectiveness of the space, frequency, and time diversity. Results are presented for the forward and reverse transmission paths. On the forward path, both mobile and portable receiver antenna configurations have been examined. The complementary set of diversity techniques incorporated within the system has been found to allow robust operation even on the severe multipath fading channels characteristic of the expanded PCS propagation environment.

12 citations


Cited by
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Patent
12 Jun 2012
TL;DR: In this article, the authors propose a packet-centric wireless system, which includes a wireless base station communicating via a transmission control protocol/internet protocol (TCP/IP) to a first data network, one or more host workstations communicating via TCP/IP to the first datacenter, and a subscriber CPE station coupled with the wireless BS over a shared bandwidth over a wireless medium.
Abstract: A packet-centric wireless system includes: a wireless base station communicating via a transmission control protocol/internet protocol (TCP/IP) to a first data network; one or more host workstations communicating via TCP/IP to the first data network; one or more subscriber customer premise equipment (CPE) stations coupled with the wireless base station over a shared bandwidth via TCP/IP over a wireless medium; and one or more subscriber workstations coupled via TCP/IP to each of the subscriber CPE stations over a second network. The system can allocate shared bandwidth among the subscriber CPE stations to optimize end-user quality of service (QoS). The first data network includes at least one of: a wireline network; a wireless network; a local area network (LAN); and a wide area network (WAN). The second network includes at least one of: a wireline network; a wireless network; a local area network (LAN); and a wide area network (WAN).

541 citations

Patent
09 Jul 1999
TL;DR: In this paper, an application aware, QoS sensitive, media access control (MAC) layer includes an application-aware resource allocator, where the resource allocators allocates bandwidth resource to an application based on an application type.
Abstract: An application aware, quality of service (QoS) sensitive, media access control (MAC) layer includes an application-aware resource allocator, where the resource allocator allocates bandwidth resource to an application based on an application type. The application type can be based on input from at least one of: a packet header; and an application communication to the MAC layer. The application communication includes: a communication between the application, running on at least one of a subscriber workstation and a host workstation, and the MAC layer, running on at least one of a subscriber CPE station and a wireless base station. The bandwidth resource is wireless bandwidth. The resource allocator schedules bandwidth resource to an IP flow. The IP flow includes at least one of: a transmission control protocol/internet protocol (TCP/IP) IP flow; and a user datagram protocol/internet protocol (UDP/IP) IP flow. The resource allocator in scheduling takes into account resource requirements of at least one of a source application and a destination application of an IP flow. The resource allocator takes into account IP flow identification information extracted from at least one packet header field. The bandwidth resource is wireless bandwidth. The resource allocator allocates switching resource to an application based on an application type. The application type is based on input from at least one of: packet header; and an application communication to the MAC layer. The application communication includes a communication between an application, running on at least one of a subscriber workstation and a host workstation, and the MAC layer, running on at least one of a subscriber CPE station and a wireless base station. The application communication includes a priority class of the IP flow.

427 citations

Proceedings ArticleDOI
01 Dec 2012
TL;DR: A novel approach in increasing the capacity of LTE cellular networks by leveraging high frequency reuse at high frequency bands in conjunction with a Macrocell, which can achieve high capacity enhancement using small cells at the same time taking into consideration mobility, scalability and flexibility requirements for massive deployment.
Abstract: This paper introduces a novel approach in increasing the capacity of LTE cellular networks. The solution is based on massive deployment of small cells by leveraging high frequency reuse at high frequency bands in conjunction with a Macrocell. The presence, discovery and usage of the small cells are controlled dynamically by a Macrocell in a master-slave configuration hence they are called Phantom Cells. To realize this concept, a new method of managing the connections between mobile terminals and small cell nodes is introduced. It is achieved by splitting the Control and User (C/U) planes of the radio link. The combination of C/U-plane split and Phantom Cells can achieve high capacity enhancement using small cells at the same time taking into consideration mobility, scalability and flexibility requirements for massive deployment. The advantages of this approach as well as the implementation aspects are described in the paper. Simulations were also conducted to verify the concept and the results show some promising capacity enhancements. The rest of the paper describes the Phantom Cell concept as well as the challenges of deploying small cells in LTE networks.

396 citations

Patent
24 Sep 2010
TL;DR: In this paper, a system and method for configuring a component carrier assignment message is presented, where the message is configured to identify the component carrier and include at least one of the downlink carrier frequency, a carrier frequency of a paired uplink carrier, and a bandwidth of the pair of uplink carriers.
Abstract: A system and method for configuring a component carrier is presented. A component carrier assignment message is received. The component carrier assignment message may be configured to identify the component carrier and include at least one of, at least one of a downlink carrier frequency, a carrier frequency of a paired uplink carrier, a bandwidth of the component carrier, and a bandwidth of the paired uplink carrier, an indication of whether the component carrier is a control channel monitoring component carrier configured to signal data channel assignment information for the component carrier, and a logical index of the component carrier. The component carrier assignment message may then be used to configure the component carrier on a user equipment (UE).

332 citations

Patent
20 Oct 2009
TL;DR: In this article, a method and apparatus for transmitting uplink control information (UCI) for Long Term Evolution-Advanced (LTE-A) using carrier aggregation is disclosed.
Abstract: A method and apparatus for transmitting uplink control information (UCI) for Long Term Evolution-Advanced (LTE-A) using carrier aggregation is disclosed. Methods for UCI transmission in the uplink control channel, uplink shared channel or uplink data channel are disclosed. The methods include transmitting channel quality indicators (CQI), precoding matrix indicators (PMI), rank indicators (RI), hybrid automatic repeat request (HARQ) acknowledgement/non-acknowledgement (ACK/NACK), channel status reports (CQI/PMI/RI), source routing (SR) and sounding reference signals (SRS). In addition, methods for providing flexible configuration in signaling UCI, efficient resource utilization, and support for high volume UCI overhead in LTE-A are disclosed.

321 citations