Mostra el registre d'ítem simple
A proposal for an adaptive s-aloha access system for a mobile cdma environment
dc.contributor.author | Sallent Roig, Oriol |
dc.contributor.author | Agustí Comes, Ramon |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions |
dc.date.accessioned | 2018-05-15T14:09:02Z |
dc.date.available | 2018-05-15T14:09:02Z |
dc.date.issued | 1998-08 |
dc.identifier.citation | Sallent, J., Agusti, R. A proposal for an adaptive s-aloha access system for a mobile cdma environment. "IEEE transactions on vehicular technology", Agost 1998, vol. 47, núm. 3, p. 977-986. |
dc.identifier.issn | 0018-9545 |
dc.identifier.uri | http://hdl.handle.net/2117/117238 |
dc.description.abstract | This paper presents a novel adaptive direct-sequence code-division multiple-access (DS-CDMA) slotted-ALOHA (S-ALOHA) packet random-access scheme with transmitter-based spreading codes for mobiles. It is aimed at improving throughput and message delay delivery when traffic load values below the saturation point of the conventional DS-CDMA S-ALOHA system are sensed in the channel. For this purpose, one mobile-station (MS) and two base-station (BS)-assisted algorithms are envisaged to control the change of the transmission rate according to the traffic load. These algorithms revealed that the optimum behavior, obtained using a Markov chain model, may almost be reached at a low-complexity cost. A traffic model based on a realistic statistical length distribution of the messages illustrates how the delay delivery can be greatly reduced with the proposed algorithms. Finally, the impact of forward-error-correction (FEC) coding on the adaptive system is also studied. |
dc.format.extent | 10 p. |
dc.language.iso | eng |
dc.subject | Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Comunicacions mòbils |
dc.subject.lcsh | Intelligent transportation systems |
dc.subject.other | Forward error correction |
dc.subject.other | Access protocols |
dc.subject.other | Code division multiple access |
dc.subject.other | Packet radio networks |
dc.subject.other | Land mobile radio |
dc.subject.other | Spread spectrum communication |
dc.subject.other | Delays |
dc.subject.other | Markov processes |
dc.subject.other | Telecommunication traffic |
dc.title | A proposal for an adaptive s-aloha access system for a mobile cdma environment |
dc.type | Article |
dc.subject.lemac | Sistemes de transport intel·ligent |
dc.contributor.group | Universitat Politècnica de Catalunya. GRCM - Grup de Recerca en Comunicacions Mòbils |
dc.identifier.doi | 10.1109/25.704852 |
dc.description.peerreviewed | Peer Reviewed |
dc.relation.publisherversion | http://ieeexplore.ieee.org.recursos.biblioteca.upc.edu/document/704852/ |
dc.rights.access | Open Access |
local.identifier.drac | 801930 |
dc.description.version | Postprint (published version) |
local.citation.author | Sallent, J.; Agusti, R. |
local.citation.publicationName | IEEE transactions on vehicular technology |
local.citation.volume | 47 |
local.citation.number | 3 |
local.citation.startingPage | 977 |
local.citation.endingPage | 986 |
Fitxers d'aquest items
Aquest ítem apareix a les col·leccions següents
-
Articles de revista [2.528]
-
Articles de revista [146]