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1. WO2017074254 - TWO-STEP CONTENTION-BASED RANDOM ACCESS OVER RADIO RESOURCES IN LAA

Publication Number WO/2017/074254
Publication Date 04.05.2017
International Application No. PCT/SE2016/051056
International Filing Date 28.10.2016
IPC
H04W 74/08 2009.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
74Wireless channel access, e.g. scheduled or random access
08Non-scheduled access, e.g. random access, ALOHA or CSMA
H04W 74/00 2009.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
74Wireless channel access, e.g. scheduled or random access
H04W 56/00 2009.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
56Synchronisation arrangements
H04W 16/14 2009.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
16Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cell structures
14Spectrum sharing arrangements
CPC
H04W 16/14
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
16Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
14Spectrum sharing arrangements ; between different networks
H04W 56/0005
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
56Synchronisation arrangements
0005synchronizing of arrival of multiple uplinks
H04W 56/0045
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
56Synchronisation arrangements
004compensating for timing error of reception due to propagation delay
0045compensating for timing error by altering transmission time
H04W 74/002
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
74Wireless channel access, e.g. scheduled or random access
002Transmission of channel access control information
H04W 74/008
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
74Wireless channel access, e.g. scheduled or random access
002Transmission of channel access control information
008with additional processing of random access related information at receiving side
H04W 74/0841
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
74Wireless channel access, e.g. scheduled or random access
08Non-scheduled ; or contention based; access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
0833using a random access procedure
0841with collision treatment
Applicants
  • TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) [SE]/[SE]
Inventors
  • SAHLIN, Henrik
  • MUKHERJEE, Amitav
Agents
  • BOU FAICAL, Roger
Priority Data
62/248,89230.10.2015US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) TWO-STEP CONTENTION-BASED RANDOM ACCESS OVER RADIO RESOURCES IN LAA
(FR) ACCÈS ALÉATOIRE EN DEUX ÉTAPES AVEC CONCURRENCE SUR DES RESSOURCES RADIO D'UNE LAA
Abstract
(EN) A contending radio node (200) is configured for attempting contention-based random access. The contending radio node (200) obtains a timing advance sequence that is susceptible to contention. The contending radio node (200) transmits, using the same transmission advancement timing, the timing advance sequence and a contention-resolving identity to a recipient radio node (250). Responsive to that transmission, the contending radio node (200) receives a response signal that indicates a contention-resolving identity and a timing advance. The contending radio node (200) resolves any contention in its favor when the contention- resolving identity indicated by the response signal corresponds to the contention-resolving identity that the contending radio node (200) transmitted. The contending radio node (200), responsive to resolving the contention in its favor, adjusts its transmission advancement timing according to the timing advance indicated by the response signal.
(FR) Selon l'invention, un nœud radio concurrent (200) est configuré pour tenter un accès aléatoire avec concurrence. Le nœud radio concurrent (200) obtient une séquence d'avance de synchronisation pouvant être soumise à concurrence. Le nœud radio concurrent (200) transmet, au moyen de la même synchronisation d'avancement de transmission, la séquence d'avance de synchronisation et une identité de résolution de concurrence à un nœud radio de réception (250). En réponse à cette transmission, le nœud radio concurrent (200) reçoit un signal de réponse qui indique une identité de résolution de concurrence et une avance de synchronisation. Le nœud radio concurrent (200) résout toute concurrence en sa faveur lorsque l'identité de résolution de concurrence indiquée par le signal de réponse correspond à l'identité de résolution de concurrence que le nœud radio concurrent (200) a transmise. Le nœud radio concurrent (200), en réponse à la résolution de concurrence en sa faveur, ajuste sa synchronisation d'avancement de transmission d'après l'avance de synchronisation indiquée par le signal de réponse.
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