WO2016071774A1 - Procédé et appareil pour émettre un signal de référence de découverte sur une bande non autorisée - Google Patents

Procédé et appareil pour émettre un signal de référence de découverte sur une bande non autorisée Download PDF

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Publication number
WO2016071774A1
WO2016071774A1 PCT/IB2015/002439 IB2015002439W WO2016071774A1 WO 2016071774 A1 WO2016071774 A1 WO 2016071774A1 IB 2015002439 W IB2015002439 W IB 2015002439W WO 2016071774 A1 WO2016071774 A1 WO 2016071774A1
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WO
WIPO (PCT)
Prior art keywords
carrier
unlicensed band
control message
reference signal
discovery reference
Prior art date
Application number
PCT/IB2015/002439
Other languages
English (en)
Inventor
Feng Han
Jianguo Liu
Yan Meng
Gang Shen
Original Assignee
Alcatel Lucent
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alcatel Lucent filed Critical Alcatel Lucent
Publication of WO2016071774A1 publication Critical patent/WO2016071774A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information

Definitions

  • the present invention relates to the wireless communication technology, and particularly to a method and an apparatus for transmitting U-DRS (Discovery Reference Signal on Unlicensed Band) in a communication device of a wireless communication system.
  • U-DRS Discovery Reference Signal on Unlicensed Band
  • LAA Licensed-Assisted Access
  • LAA License-Before-Talk
  • Wi-Fi Wireless Fidelity
  • Radar Radio Access
  • LBT Listen-Before-Talk
  • Table 1 Parameter list of the frame based equipments and the load based equipments.
  • LAA on unlicensed channel is quite opportunistic and intermittent because of uncertain channel sensing results and traffic variations. If the channel is sensed to be already occupied or no traffic loading is required on the unlicensed SCell, the SCell is at off state; Otherwise, the SCell is at on state. From UE's perspective, the LAA SCells on/off transitions happen frequently. It is much beneficial for UEs with reduced off-to-on transition time to improve the system performance. In order to achieve this, 3GPP Rel.12 has agreed that Discovery Reference Signal (DRS) is periodically broadcast to assist the cell identification, coarse time/frequency synchronization, intra/inter-frequency RRM measurement even when the SCell is off. For example, the DRS is transmitted by the base station with 40 or 80ms periodicity.
  • DRS Discovery Reference Signal
  • the channel may be sensed free at any time instant, which hints that the LAA DRS should not be limited at predefined positions. Otherwise, the channel may be grabbed by other LAA or Wi-Fi nodes, thus putting LTE at a disadvantage situation on the unlicensed carrier. Therefore, it is critical to design a mechanism for LAA DRS transmission in a more flexible way with more flexible set of positions.
  • the invention proposes a technical scheme of a method or an apparatus for configuring at least one user equipment to listen to a discovery reference signal on unlicensed band in a communication device of a wireless communication network, in particular used for LTE-LAA downlink.
  • a first aspect of the invention proposes a method for configuring at least one device to listen to a discovery reference signal on unlicensed band in a communication device of a wireless communication network, the method comprising:
  • the communication device transmitting a control message to the at least one communication device on a first carrier, wherein the control message indicates to transmit the discovery reference signal on unlicensed band, on at least one second carrier, to a corresponding device, such that the corresponding device listens to the discovery reference signal on unlicensed band, wherein the at least one second carrier locates in the range of the unlicensed band.
  • the method according to the present invention could inform the device via the first carrier when and on which carrier the discovery reference signal on unlicensed band should be listened to, and thus it is beneficial to reduce the monitoring complexity from the device side and improve the system performance.
  • the first carrier locates in the range of the licensed band.
  • the first carrier located in the licensed band could be used to inform the user equipment when and on which carrier to listen to the corresponding discovery reference signal on the unlicensed carrier, so as to reduce the monitoring complexity and computing load from the device side.
  • control message is transmitted to the corresponding device via a control signaling of the first carrier.
  • control signaling on the first carrier could be better used to make sure that the method according to the present invention could have a better compatibility with the current specification.
  • control signaling is contained in the physical control channel cyclic redundancy checking scrambled with a first radio network temporary identifier (RNTI).
  • RNTI radio network temporary identifier
  • the existing physical layer control channel could be utilized by configuring a new namely the first radio network temporary identifier (RNTI), so as to reach the goal of the present invention by using the existing physical layer control channel.
  • RNTI radio network temporary identifier
  • the communication device configures the first radio network temporary identifier (RNTI) to the corresponding device via high layer signaling, wherein the corresponding device is capable of working on the second carrier.
  • RNTI radio network temporary identifier
  • the device configure with the first radio network temporary identifier is decoded to obtained the required information with the help of the first radio network temporary identifier
  • the corresponding device uses the configured first radio network temporary identifier (RNTI) to continuously monitor the control message if the control message is transmitted at any subframe of any frame of the first carrier, or the corresponding device uses the configured first radio network temporary identifier (RNTI) only at a plurality of optional subframes to continuously monitor the control message if the control message could be transmitted at the plurality of optional subframes of the first carrier.
  • RNTI configured first radio network temporary identifier
  • the device monitors the control message only in a predetermined time duration and stops to monitor the control message after a predetermined times of the control message have been monitored if the control message is only transmitted for the predetermined times in the predetermined time duration.
  • control message contains a position of the start symbol of the discovery reference signal on unlicensed band.
  • the position of the start symbol of the discovery reference signal on unlicensed band locates in the current subframe or locates in the previous subframe.
  • control message contains one or more carrier identifiers, wherein the discovery reference signal on unlicensed band is transmitted on the cells corresponding to the one or more carrier identifiers.
  • the one or more carrier identifiers contained by the control message are configured via high layer signaling.
  • control message is transmitted in the common search space of the physical control channel of the first carrier.
  • the physical layer control channel uses DCI format 1C or a redefined DCI format to indicate the transmission of the discovery reference signal on unlicensed band.
  • the transmission of the discovery reference signal on unlicensed band occupies a plurality of continuous OFDM symbols on the at least one second carrier and the plurality of OFDM symbols are not blanked.
  • the corresponding device performs channel tracking and/or channel state information/wireless resource management measurement by listening to the discovery reference signal on unlicensed band.
  • the clear channel assessment is performed on the corresponding second carrier and if the result of the clear channel assessment indicates that the corresponding channel is free, then the discovery reference signal on unlicensed band is transmitted to the corresponding device on the corresponding second carrier.
  • a second aspect of the invention proposes an apparatus for configuring at least one device to listen to a discovery reference signal on unlicensed band in a device of a wireless communication system, the apparatus comprises:
  • control message transmitting unit transmitting control message on a first carrier, wherein the control message indicates to receive the discovery reference signal on unlicensed band on at least one second carrier, such that the device listens to the discovery reference signal on unlicensed band, wherein the at least one second carrier locates in the range of the unlicensed band.
  • the first carrier locates in the range of the licensed band.
  • a third aspect of the invention proposes an apparatus for listening to discovery reference signal on unlicensed band in a device of a wireless communication system, the apparatus comprises:
  • control message receiving unit receiving a control message on a first carrier, wherein the control message indicates to receive the discovery reference signal on unlicensed band on at least one second carrier, such that the device listens to the discovery reference signal on unlicensed band, wherein the at least one second carrier locates in the range of the unlicensed band.
  • the first carrier locates in the range of the unlicensed band.
  • the method according to the present invention could inform the device via the first carrier when and on which carrier the discovery reference signal on unlicensed band should be listen to, and thus it is beneficial to reduce the monitoring complexity from the device side and improve the system performance.
  • Fig. l illustrates the transmission window of one possible embodiment of the U-DRS 100 according to the present invention
  • Fig.2A illustrates one possible embodiment 200 of the control message according to the present invention
  • Fig.2B illustrates one possible embodiment 200' of the control message according to the present invention
  • Fig.3 illustrates one possible embodiment 300 of the control message according to the present invention
  • Fig.4 illustrates the LTE sub frame structure diagram 400 according to the traditional method
  • Fig.5 illustrates the U-DRS subframe structure diagram 500 according to the present invention.
  • a first aspect of the invention proposes a method for configuring at least one device to listen to a discovery reference signal on unlicensed band in a communication device of a wireless communication network, the method comprises:
  • the communication device transmits a control message to the at least one communication device on a first carrier, wherein the control message indicates to transmit the discovery reference signal on unlicensed band to a corresponding device on at least one second carrier, wherein the at least one second carrier locates in the range of the unlicensed band.
  • the method according to the present invention could inform the device via the first carrier when and on which carrier the discovery reference signal on unlicensed band should be listen, and thus it is beneficial to reduce the monitoring complexity from the device side and improve the system performance.
  • the first carrier locates in the range of the licensed band.
  • the first carrier located in the licensed band could be used to inform the user equipment when and on which carrier to listen to the corresponding discovery reference signal on the unlicensed carrier, so as to reduce the monitoring complexity and computing load from the device side.
  • the control message is transmitted to the corresponding device via a control signaling of the first carrier.
  • control signaling on the first carrier could be better used to make sure that the method according to the present invention could have a better compatibility with the current specification.
  • control signaling is contained in the physical control channel cyclic redundancy checking scrambled with a first radio network temporary identifier (RNTI).
  • RNTI radio network temporary identifier
  • the existing physical layer control channel could be utilized by configuring a new namely the first radio network temporary identifier (RNTI), so as to reach the goal of the present invention by using the existing physical layer control channel.
  • RNTI radio network temporary identifier
  • the communication device configures the first radio network temporary identifier (RNTI) to the corresponding device via high layer signaling, wherein the corresponding device is capable of working on the second carrier.
  • RNTI radio network temporary identifier
  • the device configure with the first radio network temporary identifier is decoded to obtained the required information with the help of the first radio network temporary identifier (RNTI) before the corresponding discovery signal on unlicensed band is listened to.
  • the corresponding device uses the configured first radio network temporary identifier (RNTI) to continuously monitor the control message if the control message is transmitted at any subframe of any frame of the first carrier, in such a manner the control message could be transmitted at any one of the subframes, such that the freedom of subframe transmitting is improved; or the corresponding device uses the configured first radio network temporary identifier (RNTI) only at a plurality of optional subframes to continuously monitor the control message if the control message could be transmitted at the plurality of optional subframes of the first carrier, although some freedom of occasions selection is lost by defining the location of the transmitting subframe at which the control message is transmitted, the obtained gain is that the listening time required by the user equipment and the complexity thereof are significantly reduced.
  • RNTI configured first radio network temporary identifier
  • Fig. l illustrates the transmission window of one possible embodiment of the U-DRS 100 according to the present invention.
  • the specified U-DRS transmitting window has three times of transmitting occasions, at this time the user equipment only needs to listen in the specified transmitting window and more particular only needs to listen on the corresponding occasions, and thus the complexity of listening is significantly reduced, namely the attempting times of blind detection of the PDCCH by the user equipment is reduced.
  • the device monitors the control message only in a predetermined time duration and stops to monitor the control message after a predetermined times of the control message have been monitored if the control message is only transmitted for the predetermined times in the predetermined time duration. In such a manner, the listening time required by the user equipment and the complexity thereof are also significantly reduced.
  • control message contains a position of the start symbol of the discovery reference signal on unlicensed band.
  • the position of the start symbol of the discovery reference signal on unlicensed band locates in the current subframe or locates in the previous subframe.
  • Fig.2A illustrates one possible embodiment 200 of the control message according to the present invention.
  • the third subframe on the PCell transmits the control message to a corresponding user equipment, so as to inform the user equipment the starting symbol position of the discovery reference signal on unlicensed band, for example, the starting position in the embodiment illustrated in Fig.2A is negative, i.e., "-3", to inform the user equipment to start receiving the discovery reference signal on unlicensed band on the last third OFDM symbol of the previous subframe namely the second subframe.
  • Fig.2B illustrates one possible embodiment 200' of the control message according to the present invention.
  • the third subframe on the PCell transmits the control message to a corresponding user equipment, so as to inform the user equipment the starting symbol position of the discovery reference signal on unlicensed band, for example, the starting position in the embodiment illustrated in Fig.2A is zero or no indication, to inform the user equipment to start receiving the discovery reference signal on unlicensed band on the first OFDM symbol of the third subframe.
  • Fig.3 illustrates one possible embodiment 300 of the control message according to the present invention.
  • the third subframe on the PCell transmits the control message to a corresponding user equipment, so as to inform the user equipment the starting symbol position of the discovery reference signal on unlicensed band, for example, the starting position in the embodiment illustrated in Fig.3 is positive, i.e., "+6", to inform the user equipment to start receiving the discovery reference signal on unlicensed band on the sixth OFDM symbol of the third subframe.
  • the control message contains one or more carrier identifiers, wherein the discovery reference signal on unlicensed band is transmitted on the carrier corresponding to the one or more carrier identifiers.
  • the communication device configures the first radio network temporary identifier (RNTI) to the corresponding device via high layer signaling. For example, setting the carrier identifier to "1" represents transmitting U-DRS on a carrier corresponding to the carrier identifier, and setting the carrier identifier to "0" represents not transmitting U-DRS on a carrier corresponding to the carrier identifier.
  • RNTI radio network temporary identifier
  • setting the carrier identifier to "1" represents transmitting U-DRS on a carrier corresponding to the carrier identifier
  • setting the carrier identifier to "0" represents not transmitting U-DRS on a carrier corresponding to the carrier identifier.
  • Such a setting or resetting operation and the mapping relationship between the carrier identifier and the unlicensed Scell could be configured by high layer signaling.
  • control message is transmitted in the common search space of the physical control channel of the first carrier.
  • the physical layer control channel uses DCI format IC or a redefined DCI format to indicate the transmission of the discovery reference signal on unlicensed band.
  • Fig.4 illustrates the LTE sub frame structure diagram 400 according to the traditional method.
  • the second to the fourth OFDM symbols and the ninth to the eleventh OFDM symbols are absolutely blanked, such a result will induce that the carrier may be occupied by other nodes or communication devices, and thus the possibility of obtaining the using right by the corresponding user equipment is lowered.
  • the transmission of the discovery reference signal on unlicensed band occupies a plurality of continuous OFDM symbols on the at least one second carrier and the plurality of OFDM symbols are not blanked.
  • Fig.5 illustrates the U-DRS subframe structure diagram 500 according to the present invention.
  • any of the OFDM symbols is not blanked, such a configuration could guarantee that the corresponding user equipment could obtain the using right of the corresponding channel with a higher possibility, such that the communication performance of the corresponding user equipment is significantly improved.
  • the corresponding device performs channel tracking and/or channel state information/wireless resource management measurement by listening the discovery reference signal on unlicensed band.
  • the clear channel assessment is performed on the corresponding second carrier and if the result of the clear channel assessment indicates that the corresponding channel is free, then the discovery reference signal on unlicensed band is transmitted to the corresponding device on the corresponding second carrier.
  • a second aspect of the invention proposes an apparatus for configuring at least one device to listen a discovery reference signal on unlicensed band in a device of a wireless communication system, the apparatus comprises:
  • control message transmitting unit transmitting control message on a first carrier, wherein the control message indicates to receive the discovery reference signal on unlicensed band on at least one second carrier, such that the device listens the discovery reference signal on unlicensed band, wherein the at least one second carrier locates in the range of the unlicensed band.
  • the first carrier locates in the range of the unlicensed band.
  • a third aspect of the invention proposes an apparatus for listening discovery reference signal on unlicensed band in a device of a wireless communication system, the apparatus comprises:
  • control message receiving unit receiving control message on a first carrier, wherein the control message indicates to receive the discovery reference signal on unlicensed band on at least one second carrier, such that the device listens the discovery reference signal on unlicensed band, wherein the at least one second carrier locates in the range of the unlicensed band.
  • the first carrier locates in the range of the licensed band.
  • the method according to the present invention could inform the device via the first carrier when and on which carrier the discovery reference signal on unlicensed band should be listen, and thus it is beneficial to reduce the monitoring complexity from the device side and improve the system performance.

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé pour configurer au moins un dispositif pour écouter un signal de référence de découverte sur une bande non autorisée dans un dispositif de communication d'un réseau de communication sans fil, le procédé consistant à transmettre, par le dispositif de communication, un message de commande au ou aux dispositifs de communication sur une première porteuse, le message de commande indiquant d'émettre le signal de référence de découverte sur une bande non autorisée à destination d'un dispositif correspondant sur au moins une seconde porteuse, la ou les secondes porteuses étant situées dans la plage de la bande non autorisée. Le procédé, selon la présente invention, peut informer le dispositif par l'intermédiaire de la première porteuse du moment et de la porteuse sur laquelle le signal de référence de découverte sur une bande non autorisée doit être écouté, et ainsi, il est bénéfique de réduire la complexité de surveillance à partir du côté dispositif et d'améliorer les performances du système. En outre, la présente invention concerne un appareil pour configurer un dispositif pour écouter un signal de référence de découverte sur une bande non autorisée et un appareil pour écouter un signal de référence de découverte sur une bande non autorisée.
PCT/IB2015/002439 2014-11-07 2015-11-05 Procédé et appareil pour émettre un signal de référence de découverte sur une bande non autorisée WO2016071774A1 (fr)

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CN201410625455.2A CN105634698B (zh) 2014-11-07 2014-11-07 用于传输未受许可的频段上的发现参考信号的方法和装置
CN201410625455.2 2014-11-07

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11741093B1 (en) 2021-07-21 2023-08-29 T-Mobile Usa, Inc. Intermediate communication layer to translate a request between a user of a database and the database
US11924711B1 (en) 2021-08-20 2024-03-05 T-Mobile Usa, Inc. Self-mapping listeners for location tracking in wireless personal area networks

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10958404B2 (en) 2015-11-06 2021-03-23 Qualcomm Incorporated Discovery reference signal configuration and scrambling in licensed-assisted access

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013006988A1 (fr) * 2011-07-14 2013-01-17 Renesas Mobile Corporation Procédés et appareils de fourniture d'une technique de partage de temps flexible sur une bande sans licence d'un système
US20130201884A1 (en) * 2012-02-03 2013-08-08 Interdigital Patent Holdings, Inc. Method and apparatus for coexistence among wireless transmit/receive units (wtrus) operating in the same spectrum
WO2013185835A1 (fr) * 2012-06-15 2013-12-19 Nokia Siemens Networks Oy Balayage de cellules secondaires dans un système de communication cellulaire
US20140036881A1 (en) * 2011-04-13 2014-02-06 Lg Electronics Inc. Method and apparatus for transmitting control information in a wireless communication system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102032101B1 (ko) * 2010-12-06 2019-10-14 인터디지탈 패튼 홀딩스, 인크 허가 면제 스펙트럼에서의 무선 동작을 가능케 하는 방법
WO2013006006A2 (fr) * 2011-07-07 2013-01-10 엘지전자 주식회사 Procédé et appareil de transmission d'un signal dans un système de communication sans fil
US20130016630A1 (en) * 2011-07-12 2013-01-17 Qualcomm Incorporated Beacons for user equipment relays

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140036881A1 (en) * 2011-04-13 2014-02-06 Lg Electronics Inc. Method and apparatus for transmitting control information in a wireless communication system
WO2013006988A1 (fr) * 2011-07-14 2013-01-17 Renesas Mobile Corporation Procédés et appareils de fourniture d'une technique de partage de temps flexible sur une bande sans licence d'un système
US20130201884A1 (en) * 2012-02-03 2013-08-08 Interdigital Patent Holdings, Inc. Method and apparatus for coexistence among wireless transmit/receive units (wtrus) operating in the same spectrum
WO2013185835A1 (fr) * 2012-06-15 2013-12-19 Nokia Siemens Networks Oy Balayage de cellules secondaires dans un système de communication cellulaire

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11741093B1 (en) 2021-07-21 2023-08-29 T-Mobile Usa, Inc. Intermediate communication layer to translate a request between a user of a database and the database
US11924711B1 (en) 2021-08-20 2024-03-05 T-Mobile Usa, Inc. Self-mapping listeners for location tracking in wireless personal area networks

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TWI578728B (zh) 2017-04-11
TW201631917A (zh) 2016-09-01
CN105634698A (zh) 2016-06-01
CN105634698B (zh) 2019-02-01

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