Visualitza per autoria "Barceló Vicens, Jaume"

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  • Carrier sense multiple acces with enhanced collision avoidance
    Barceló Vicens, Jaume (Universitat Pompeu Fabra, 2011-04-12)
    Aquesta tesi suggereix usar un compte enrere determinista després de les transmissions exitoses en les xarxes d'àrea local sense fils. Com que les estacions que han transmès amb èxit en el seu darrer intent no poden ...
  • Collision-free WLANs: from concepts to working protocols
    Sanabria-Russo, Luis (Universitat Pompeu Fabra, 2016-11-23)
    Using a deterministic backoff after successful transmissions as a distributed contention mechanism for access to the channel can draw benefits from scheduled operation, like the elimination of simultaneous transmissions, ...
  • A high efficiency MAC protocol for WLANs: providing fairness in dense scenarios
    Sanabria Russo, Luis; Barceló Vicens, Jaume; Bellalta, Boris; Gringoli, Francesco (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Collisions are a main cause of throughput degradation in wireless local area networks. The current contention mechanism used in the IEEE 802.11 networks is called carrier sense multiple access with collision avoidance ...
  • IEEE 802.11AH: the WiFi approach for M2M communications
    Adame, Toni; Bel, Albert; Bellalta, Boris; Barceló Vicens, Jaume; Oliver Riera, Miquel (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    M2M communications are positioned to be one of the fastest growing technology segments in the next decade. Sensor and actuator networks connect communication machines and devices so that they automatically transmit ...
  • Obey or play: asymptotic equivalence of slotted aloha with a game theoretic contention model
    Barceló Vicens, Jaume; Inaltekin, Hazer; Bellalta, Boris (Institute of Electrical and Electronics Engineers (IEEE), 2011)
    Contention control is an important means to mitigate adverse affects of multiple access interference on transmitted data packets in wireless communication networks. Most practical contention control mechanisms, e.g., IEEE ...
  • On the distributed construction of a collision-free schedule in multi-hop packet radio networks
    Barceló Vicens, Jaume; Bellalta, Boris; Cano Bastidas, Cristina; Faridi, Azadeh; Oliver Riera, Miquel (Springer, 2014)
    This paper introduces a protocol that distributively constructs a collision-free schedule for multi-hop packet radio networks in the presence of hidden terminals. As a preliminary step, each wireless station computes the ...
  • On the interactions between multiple overlapping WLANs using channel bonding
    Bellalta, Boris; Checco, Alessandro; Zocca, Alessandro; Barceló Vicens, Jaume (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Next-generation wireless local area networks (WLANs) will support the use of wider channels, which is known as channel bonding, to achieve higher throughput. However, because both the channel center frequency and the channel ...
  • On the performance of packet aggregation in IEEE 802.11ac MU-MIMO WLANs
    Bellalta, Boris; Barceló Vicens, Jaume; Staehle, Dirk; Vinel, Alexey; Oliver Riera, Miquel (Institute of Electrical and Electronics Engineers (IEEE), 2012)
    Multi-user spatial multiplexing combined with packet aggregation can significantly increase the performance of Wireless Local Area Networks (WLANs). In this letter, we present and evaluate a simple technique to perform ...
  • Performance analysis of a multiuser multi-packet transmission system for WLANs in non-saturation conditions
    Bellalta, Boris; Faridi, Azadeh; Barceló Vicens, Jaume; Daza, Vanesa; Oliver Riera, Miquel (Elsevier, 2014)
    Multiuser Multi-Packet Transmission (MPT) from an Access Point (AP) equipped with multiple antennas to multiple single-antenna nodes can be achieved by exploiting the spatial dimension of the channel. In this paper we ...
  • Performance analysis of IEEE 802.11ac wireless backhaul networks in saturated conditions
    Liao, Ruizhi; Bellalta, Boris; Barceló Vicens, Jaume; Valls, Victor; Oliver Riera, Miquel (Springer, 2013)
    According to the ongoing IEEE 802.11ac amendment, the wireless network is about to embrace the gigabit-per-second raw data rate. Compared with previous IEEE standards, this significant performance improvement can be ...
  • Taking advantage of overhearing in low power listening WSNs: a performance analysis of the LWT-MAC protocol
    Cano Bastidas, Cristina; Bellalta, Boris; Sfairopoulou, Anna; Oliver Riera, Miquel; Barceló Vicens, Jaume (Springer, 2011)
    LWT-MAC is a new Low Power Listening MAC protocol for WSNs designed to rapidly react to instantaneous increases of the network load. It takes advantage of overhearing by waking up all nodes at the end of a transmission to ...
  • Towards a collision-free WLAN: dynamic parameter adjustment in CSMA/E2CA
    Barceló Vicens, Jaume; Bellalta, Boris; Cano Bastidas, Cristina; Sfairopoulou, Anna; Oliver Riera, Miquel; Verma, Kshitiz (Springer Verlag, 2011)
    Carrier sense multiple access with enhanced collision avoidance (CSMA/ECA) is a distributed MAC protocol that allows collisionfree/naccess to the medium in WLANs. The only difference between CSMA/ECA and the well-known ...
  • Uni-MUMAC: a unified down/up-link MU-MIMO MAC protocol for IEEE 802.11ac WLANs
    Liao, Ruizhi; Bellalta, Boris; Cao, Trang Minh; Barceló Vicens, Jaume; Oliver Riera, Miquel (Springer, 2015)
    Due to the dominance of the downlink traffic in Wireless Local Area Networks (WLANs), a large number of previous research efforts have been put to enhance the downlink transmission, namely, from the Access Point (AP) to ...
  • Video-based learning in higher education: the flipped or the hands-on classroom?
    Albó, Laia; Hernández Leo, Davinia; Barceló Vicens, Jaume; Sanabria Russo, Luis (European Distance and E-Learning Network, 2015)
    Nowadays Higher Education is adopting new ways of teaching such as ways of Video-Based Learning (VBL) with the/naim of moving away from the traditional classrooms. The interest in VBL has increased as a result of new forms ...

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