WO2020029675A1 - Procédé et appareil de transmission de signal de référence de sondage - Google Patents

Procédé et appareil de transmission de signal de référence de sondage Download PDF

Info

Publication number
WO2020029675A1
WO2020029675A1 PCT/CN2019/090544 CN2019090544W WO2020029675A1 WO 2020029675 A1 WO2020029675 A1 WO 2020029675A1 CN 2019090544 W CN2019090544 W CN 2019090544W WO 2020029675 A1 WO2020029675 A1 WO 2020029675A1
Authority
WO
WIPO (PCT)
Prior art keywords
sounding reference
reference signal
terminal device
configuration information
signal transmission
Prior art date
Application number
PCT/CN2019/090544
Other languages
English (en)
Inventor
Jinhua Liu
Gen LI
Zhan Zhang
Original Assignee
Telefonaktiebolaget Lm Ericsson (Publ)
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 Telefonaktiebolaget Lm Ericsson (Publ) filed Critical Telefonaktiebolaget Lm Ericsson (Publ)
Publication of WO2020029675A1 publication Critical patent/WO2020029675A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated

Definitions

  • the present disclosure generally relates to communication networks, and more specifically, to signal transmission in a communication network.
  • Mobile broadband may continue to drive some demands for big overall traffic capacity and huge achievable end-user data rates in a wireless communication network.
  • Many scenarios for network services in the future may require data rates of up to 10Gbps in local areas.
  • These demands for very high system capacity and end-user data rates can be met by networks where distances between access nodes may range from a few meters in indoor deployments up to roughly 50 meters in outdoor deployments, for example, by next generation communication networks with an infrastructure density considerably higher than the densest networks of today.
  • next generation communication systems such as fifth generation (5G) and new radio (NR) systems are also expected to be operable on the unlicensed band which may be sharable.
  • 5G fifth generation
  • NR new radio
  • a sounding reference signal (SRS) in an uplink (UL) may be essential for a network node to estimate the uplink channel quality at different frequencies, which may then be used to efficiently assign radio resources for the uplink transmission. Thus, it is desirable to configure SRS transmission for the uplink transmission efficiently.
  • a wireless communication network such as 5G or NR may be able to support flexible channel sharing and multi-user transmissions.
  • carrier sensing is used for acquiring a channel in the shared spectrum.
  • autonomous uplink transmission is introduced for the unlicensed operation.
  • the autonomous uplink transmission based on non-dynamic or semi-static scheduling may be not good for link adaptation, because a network node may not be able to perform timely uplink channel quality measurement according to the associated SRS transmission from a terminal device. Therefore, it may be desirable to configure the SRS transmission in a more efficient way.
  • Various embodiments of the present disclosure propose a solution of SRS transmission in a communication network, which can timely trigger the SRS transmission upon uplink data transmission which may be based on non-dynamic or semi-static scheduling, so that a network node can achieve the uplink measurement for the optimal link adaptation as early as possible.
  • the semi-static scheduling as mentioned herein may comprise the configured scheduling (CS) for NR, the semi-persistent scheduling (SPS) for LTE, or any other scheduling scheme for allocating periodical uplink grants to a terminal device by a network node.
  • an uplink grant may comprise some scheduling configurations for a UE, for example, resource allocation, transmission parameters such as a rank indicator (RI) or a precoding matrix indicator (PMI) , etc.
  • the UE may transmit uplink data according to the uplink grant received from a gNB.
  • a method implemented at a network node may comprise determining configuration information of SRS transmission from a terminal device to the network node.
  • the configuration information can enable the terminal device to: trigger the SRS transmission, in response to an uplink data transmission to be performed according to semi-static uplink resource allocation.
  • the method may further comprise transmitting the configuration information to the terminal device and detecting the SRS transmission from the terminal device.
  • the transmission of the configuration information may comprise transmitting at least part of the configuration information to the terminal device in an information element which indicates the semi-static uplink resource allocation for the uplink data transmission.
  • the configuration information may comprise one or more parameters transmitted via radio resource control (RRC) signaling to configure the SRS transmission.
  • RRC radio resource control
  • the configuration information may further comprise an indicator transmitted in an activation command of the uplink data transmission to enable or disable the SRS transmission associated with the uplink data transmission.
  • the configuration information may further comprise an activation instruction transmitted in downlink control information specified for the SRS transmission.
  • the SRS transmission may be detected upon reception of uplink data from the terminal device.
  • the method according to the first aspect of the present disclosure may further comprise determining a starting point of the uplink data based at least in part on the detection of the SRS transmission.
  • the method according to the first aspect of the present disclosure may further comprise measuring one or more SRSs in response to the detection of the SRS transmission.
  • the one or more SRSs may be transmitted according to a predefined pattern by the terminal device respectively within one or more transmission opportunities preconfigured for the uplink data transmission.
  • the method according to the first aspect of the present disclosure may further comprise determining dynamic uplink resource allocation for the terminal device based at least in part on the measurement of the one or more SRSs.
  • the method according to the first aspect of the present disclosure may further comprise notifying the terminal device of the dynamic uplink resource allocation, so as to enable the terminal device to override at least the semi-static uplink resource allocation with the dynamic uplink resource allocation.
  • the method according to the first aspect of the present disclosure may further comprise receiving uplink data from the terminal device in one or more resource units initially configured for the SRS transmission.
  • an apparatus may comprise one or more processors and one or more memories comprising computer program codes.
  • the one or more memories and the computer program codes may be configured to, with the one or more processors, cause the apparatus at least to perform any step of the method according to the first aspect of the present disclosure.
  • a computer-readable medium having computer program codes embodied thereon which, when executed on a computer, cause the computer to perform any step of the method according to the first aspect of the present disclosure.
  • an apparatus may comprise a determining unit, a transmitting unit and a detecting unit.
  • the determining unit may be operable to carry out at least the determining step of the method according to the first aspect of the present disclosure.
  • the transmitting unit may be operable to carry out at least the transmitting step of the method according to the first aspect of the present disclosure.
  • the detecting unit may be operable to carry out at least the detecting step of the method according to the first aspect of the present disclosure.
  • a method implemented at a terminal device may comprise receiving, from a network node, configuration information of SRS transmission from the terminal device to the network node.
  • the configuration information can enable the terminal device to: trigger the SRS transmission, in response to an uplink data transmission to be performed according to semi-static uplink resource allocation.
  • the method may further comprise arranging the SRS transmission based at least in part on the configuration information.
  • said receiving the configuration information from the network node may comprise: receiving at least part of the configuration information from the network node in an information element which indicates the semi-static uplink resource allocation for the uplink data transmission.
  • the SRS transmission may be arranged to be performed upon the uplink data transmission.
  • the configuration information may comprise one or more parameters received via RRC signaling to configure the SRS transmission.
  • the configuration information may further comprise an indicator received in an activation command of the uplink data transmission to enable or disable the SRS transmission associated with the uplink data transmission.
  • the configuration information may further comprise an activation instruction received in downlink control information specified for the SRS transmission.
  • the method according to the fifth aspect of the present disclosure may further comprise: transmitting one or more SRSs according to a predefined pattern to the network node respectively within one or more transmission opportunities preconfigured for the uplink data transmission.
  • the method according to the fifth aspect of the present disclosure may further comprise obtaining dynamic uplink resource allocation for the terminal device from the network node.
  • the dynamic uplink resource allocation may be based at least in part on measurement of the one or more SRSs by the network node.
  • the method according to the fifth aspect of the present disclosure may further comprise overriding at least the semi-static uplink resource allocation with the dynamic uplink resource allocation.
  • the method according to the fifth aspect of the present disclosure may further comprise performing rate matching to map uplink data into one or more resource units initially configured for the SRS transmission.
  • the method according to the fifth aspect of the present disclosure may further comprise transmitting the mapped uplink data to the network node without transmitting an SRS.
  • an apparatus may comprise one or more processors and one or more memories comprising computer program codes.
  • the one or more memories and the computer program codes may be configured to, with the one or more processors, cause the apparatus at least to perform any step of the method according to the fifth aspect of the present disclosure.
  • a computer-readable medium having computer program codes embodied thereon which, when executed on a computer, cause the computer to perform any step of the method according to the fifth aspect of the present disclosure.
  • an apparatus may comprise a receiving unit and an arranging unit.
  • the receiving unit may be operable to carry out at least the receiving step of the method according to the fifth aspect of the present disclosure.
  • the arranging unit may be operable to carry out at least the arranging step of the method according to the fifth aspect of the present disclosure.
  • the configuration information may indicate at least one of the following: one or more resource units for the SRS transmission; an indication of whether or not beamforming is applicable for the SRS transmission; and one or more power control parameters for the SRS transmission.
  • the configuration information may indicate the terminal device to transmit an SRS in a starting resource unit in time domain within a transmission opportunity preconfigured for the uplink data transmission.
  • the uplink data transmission and the SRS transmission may be performed in an unlicensed carrier.
  • a method implemented in a communication system which may include a host computer, a base station and a UE.
  • the method may comprise providing user data at the host computer.
  • the method may comprise, at the host computer, initiating a transmission carrying the user data to the UE via a cellular network comprising the base station which may perform any step of the method according to the first aspect of the present disclosure.
  • a communication system including a host computer.
  • the host computer may comprise processing circuitry configured to provide user data, and a communication interface configured to forward the user data to a cellular network for transmission to a UE.
  • the cellular network may comprise a base station having a radio interface and processing circuitry.
  • the base station s processing circuitry may be configured to perform any step of the method according to the first aspect of the present disclosure.
  • a method implemented in a communication system which may include a host computer, a base station and a UE.
  • the method may comprise providing user data at the host computer.
  • the method may comprise, at the host computer, initiating a transmission carrying the user data to the UE via a cellular network comprising the base station.
  • the UE may perform any step of the method according to the fifth aspect of the present disclosure.
  • a communication system including a host computer.
  • the host computer may comprise processing circuitry configured to provide user data, and a communication interface configured to forward user data to a cellular network for transmission to a UE.
  • the UE may comprise a radio interface and processing circuitry.
  • the UE’s processing circuitry may be configured to perform any step of the method according to the fifth aspect of the present disclosure.
  • a method implemented in a communication system which may include a host computer, a base station and a UE.
  • the method may comprise, at the host computer, receiving user data transmitted to the base station from the UE which may perform any step of the method according to the fifth aspect of the present disclosure.
  • a communication system including a host computer.
  • the host computer may comprise a communication interface configured to receive user data originating from a transmission from a UE to a base station.
  • the UE may comprise a radio interface and processing circuitry.
  • the UE’s processing circuitry may be configured to perform any step of the method according to the fifth aspect of the present disclosure.
  • a method implemented in a communication system which may include a host computer, a base station and a UE.
  • the method may comprise, at the host computer, receiving, from the base station, user data originating from a transmission which the base station has received from the UE.
  • the base station may perform any step of the method according to the first aspect of the present disclosure.
  • a communication system which may include a host computer.
  • the host computer may comprise a communication interface configured to receive user data originating from a transmission from a UE to a base station.
  • the base station may comprise a radio interface and processing circuitry.
  • the base station’s processing circuitry may be configured to perform any step of the method according to the first aspect of the present disclosure.
  • Fig. 1 is a diagram illustrating an example of autonomous uplink transmission according to some embodiments of the present disclosure
  • Fig. 2 is a diagram illustrating an example of link adaptation according to some embodiments of the present disclosure
  • Fig. 3 is a diagram illustrating an example of link adaptation improvement according to some embodiments of the present disclosure
  • Fig. 4 is a flowchart illustrating a method according to some embodiments of the present disclosure.
  • Fig. 5 is a flowchart illustrating another method according to some embodiments of the present disclosure.
  • Fig. 6 is a block diagram illustrating an apparatus according to some embodiments of the present disclosure.
  • Fig. 7 is a block diagram illustrating another apparatus according to some embodiments of the present disclosure.
  • Fig. 8 is a block diagram illustrating yet another apparatus according to some embodiments of the present disclosure.
  • Fig. 9 is a block diagram illustrating a telecommunication network connected via an intermediate network to a host computer in accordance with some embodiments of the present disclosure
  • Fig. 10 is a block diagram illustrating a host computer communicating via a base station with a UE over a partially wireless connection in accordance with some embodiments of the present disclosure
  • Fig. 11 is a flowchart illustrating a method implemented in a communication system, in accordance with an embodiment of the present disclosure
  • Fig. 12 is a flowchart illustrating a method implemented in a communication system, in accordance with an embodiment of the present disclosure
  • Fig. 13 is a flowchart illustrating a method implemented in a communication system, in accordance with an embodiment of the present disclosure.
  • Fig. 14 is a flowchart illustrating a method implemented in a communication system, in accordance with an embodiment of the present disclosure.
  • the term “communication network” refers to a network following any suitable communication standards, such as new radio (NR) , long term evolution (LTE) , LTE-Advanced, wideband code division multiple access (WCDMA) , high-speed packet access (HSPA) , and so on.
  • NR new radio
  • LTE long term evolution
  • WCDMA wideband code division multiple access
  • HSPA high-speed packet access
  • the communications between a terminal device and a network node in the communication network may be performed according to any suitable generation communication protocols, including, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , 4G, 4.5G, 5G communication protocols, and/or any other protocols either currently known or to be developed in the future.
  • the term “network node” refers to a network device in a communication network via which a terminal device accesses to the network and receives services therefrom.
  • the network node may refer to a base station (BS) , an access point (AP) , a multi-cell/multicast coordination entity (MCE) , a controller or any other suitable device in a wireless communication network.
  • BS base station
  • AP access point
  • MCE multi-cell/multicast coordination entity
  • the BS may be, for example, a node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a next generation NodeB (gNodeB or gNB) , a remote radio unit (RRU) , a radio header (RH) , a remote radio head (RRH) , a relay, a low power node such as a femto, a pico, and so forth.
  • NodeB or NB node B
  • eNodeB or eNB evolved NodeB
  • gNodeB or gNB next generation NodeB
  • RRU remote radio unit
  • RH radio header
  • RRH remote radio head
  • relay a low power node such as a femto, a pico, and so forth.
  • the network node comprise multi-standard radio (MSR) radio equipment such as MSR BSs, network controllers such as radio network controllers (RNCs) or base station controllers (BSCs) , base transceiver stations (BTSs) , transmission points, transmission nodes, positioning nodes and/or the like. More generally, however, the network node may represent any suitable device (or group of devices) capable, configured, arranged, and/or operable to enable and/or provide a terminal device access to a wireless communication network or to provide some service to a terminal device that has accessed to the wireless communication network.
  • MSR multi-standard radio
  • RNCs radio network controllers
  • BSCs base station controllers
  • BTSs base transceiver stations
  • transmission points transmission nodes
  • positioning nodes positioning nodes and/or the like.
  • the network node may represent any suitable device (or group of devices) capable, configured, arranged, and/or operable to enable and/or provide a terminal device access to a wireless communication network or to provide
  • terminal device refers to any end device that can access a communication network and receive services therefrom.
  • the terminal device may refer to a mobile terminal, a user equipment (UE) , or other suitable devices.
  • the UE may be, for example, a subscriber station, a portable subscriber station, a mobile station (MS) or an access terminal (AT) .
  • the terminal device may include, but not limited to, portable computers, image capture terminal devices such as digital cameras, gaming terminal devices, music storage and playback appliances, a mobile phone, a cellular phone, a smart phone, a tablet, a wearable device, a personal digital assistant (PDA) , a vehicle, and the like.
  • PDA personal digital assistant
  • a terminal device may also be called an IoT device and represent a machine or other device that performs monitoring, sensing and/or measurements etc., and transmits the results of such monitoring, sensing and/or measurements etc. to another terminal device and/or a network equipment.
  • the terminal device may in this case be a machine-to-machine (M2M) device, which may in a 3rd generation partnership project (3GPP) context be referred to as a machine-type communication (MTC) device.
  • M2M machine-to-machine
  • 3GPP 3rd generation partnership project
  • the terminal device may be a UE implementing the 3GPP narrow band Internet of things (NB-IoT) standard.
  • NB-IoT 3GPP narrow band Internet of things
  • machines or devices are sensors, metering devices such as power meters, industrial machinery, or home or personal appliances, e.g. refrigerators, televisions, personal wearables such as watches etc.
  • a terminal device may represent a vehicle or other equipment, for example, a medical instrument that is capable of monitoring, sensing and/or reporting etc. on its operational status or other functions associated with its operation.
  • the terms “first” , “second” and so forth refer to different elements.
  • the singular forms “a” and “an” are intended to include the plural forms as well, unless the context clearly indicates otherwise.
  • the term “based on” is to be read as “based at least in part on” .
  • the term “one embodiment” and “an embodiment” are to be read as “at least one embodiment” .
  • the term “another embodiment” is to be read as “at least one other embodiment” .
  • Other definitions, explicit and implicit, may be included below.
  • Wireless communication networks are widely deployed to provide various telecommunication services such as voice, video, data, messaging and broadcasts.
  • a wireless communication network such as a NR or 5G system
  • a radio device can benefit from the additional transmission capacity provided by the unlicensed band.
  • the NR or 5G system may be operated in the unlicensed spectrum which is shared by various wireless communication systems.
  • the harmonious spectrum sharing scheme with acceptable complexity for both standardization and system design may be preferred to ensure that different systems can operate well.
  • a carrier/channel sensing scheme is used to detect availability of a carrier/channel. For example, before accessing a channel, a wireless communication system needs to determine whether the channel is available via sensing the channel. If the channel is determined not available, the wireless communication system cannot access the channel.
  • SRS is typically used by a network node such as eNB/gNB to estimate the uplink channel quality at different frequencies, which may then be used to efficiently assign radio resources for the uplink data transmission.
  • the SRS in the uplink may be essential for several procedures. Apart from the ones in the LTE system for which the SRS has been primarily designed, such as scheduling and link adaptation, it is also expected that there might be increased focus on the new ones in the NR system, such as reciprocity-based precoding design for massive multiple-input multiple-output (MIMO) and uplink beam management. These procedures may have significantly different requirements on the channel estimation quality. Also, while in the NR system multi-antenna UEs may become commonplace, depending on the use case and carrier frequency, they may have different hardware configurations and corresponding beamforming capabilities such as analogue or digital functionality.
  • MIMO massive multiple-input multiple-output
  • the NR system can support the aperiodic SRS transmission in addition to the periodic SRS transmission. But for the unlicensed operation, it may be beneficial to employ the aperiodic SRS transmission due to the channel uncertainty.
  • the aperiodic SRS transmission may be configured via radio resource control (RRC) signaling and triggered by a “SRS request” flag in downlink control information (DCI) over physical downlink control channel (PDCCH) .
  • RRC radio resource control
  • DCI downlink control information
  • PDCCH physical downlink control channel
  • an SRS trigger message such as DCI may be scrambled in a UE-specific radio network temporary identifier (RNTI) .
  • RNTI radio network temporary identifier
  • a UE configured for the aperiodic SRS transmission may commence the SRS transmission in the specified subframe (for example, subframe n+k, where k ⁇ 4) according to the aperiodic SRS time domain configuration.
  • autonomous uplink transmission may be attractive for the unlicensed operation.
  • the autonomous uplink transmission for the unlicensed operation may be based on the semi-static scheduling, such as SPS for LTE or CS for NR.
  • the SPS For the SPS, two phase configurations may be applied by the network.
  • some parameters such as periodicity, SPS-cell-RNTI (SPS-C-RNTI) , number of hybrid automatic repeat request (HARQ) processes and power control parameters may be configured to a UE via RRC signaling.
  • the time-frequency resources as well as modulation and coding scheme (MCS) may be configured to the UE by a PDCCH command (which is referred to as a SPS activation command) .
  • the uplink SPS is enabled via the PDCCH command
  • the UE can initiate the uplink data transmission using the configured resources and the MCS.
  • the MCS for the SPS resource may be overwritten by a dynamic grant.
  • the MCS or rank for the uplink data transmission can be adapted by the dynamic grant if needed.
  • CS schemes there are two types of CS schemes: Type 1 and Type 2.
  • all of the uplink scheduling parameters (such as periodicity, CS-C-RNTI, number of HARQ processes, time-frequency resources, MCS, etc. ) may be configured via RRC signaling.
  • some of the uplink scheduling parameters (such as periodicity, CS-C-RNTI, number of HARQ processes, etc. ) may be configured to a UE via RRC signaling, and the remaining uplink scheduling parameters (such as the time-frequency resources and MCS) may be configured to the UE via medium access control (MAC) signaling (e.g., by PDCCH) .
  • MAC medium access control
  • Fig. 1 is a diagram illustrating an example of autonomous uplink transmission according to some embodiments of the present disclosure.
  • the example shown in Fig. 1 may be applicable to a NR scenario where a UE is operated in an unlicensed carrier. It will be appreciated that there may be other scenarios where the communication network may apply or support various radio interface technologies which are not limited to LTE and NR technologies.
  • a transmission opportunity window comprising 3 slots in every 4 slots.
  • the UE can start uplink transmission in any slot within the transmission opportunity window according to the LBT result.
  • a gNB may send a dynamic uplink grant upon reception of a scheduling request from a UE, and the UE can send data over a physical uplink shared channel (PUSCH) according to the dynamic uplink grant if the channel corresponding to the dynamic uplink grant is available.
  • PUSCH physical uplink shared channel
  • the UE can initiate uplink transmission based on the semi-statically allocated uplink grant without scheduling request transmission or specific uplink grant reception for each transmission opportunity.
  • application of the autonomous uplink transmission based on the semi-static scheduling can decrease the PDCCH overhead and reduce the number of LBTs for both gNB and UE.
  • the delay due to the procedure of SRS transmission, uplink grant reception and data preparation for PUSCH transmission also can be saved, which boosts the probability for the UE to acquire the uplink channel.
  • the semi-static scheduling is a valid approach for a UE to contend for an unlicensed channel so as to save the PDCCH overhead and the delay due to the dynamic scheduling procedure.
  • the semi-static scheduling is not good for link adaptation, because the constant and conservative rank and MCS are configured upon uplink scheduling activation in order to conquer unpredictable channel variations.
  • rank 1 transmission is applied for both CS Type 1 and CS Type 2. For instance, in the case where rank 1 with the conservative MCS is preconfigured based on the semi-static scheduling for a UE but later on the channel quality becomes very good for the UE and 4-layer transmission is preferred, the performance loss due to the sub-optimal link adaptation is considerable.
  • An uplink grant configured via the dynamic scheduling may be used to override an uplink grant configured via the semi-static scheduling to achieve the optimal link adaptation gain.
  • the gNB may lack the timely uplink channel quality measurement, which is prerequisite to a proper link adaptation (rank and MCS) .
  • the uplink channel quality measurement relying on the periodic SRS transmission is not preferred due to the SRS transmission/reception complexity resulted from the LBT procedure and the large overhead for the periodic SRS transmission in the unlicensed channel.
  • the semi-static scheduling there is no associated PDCCH transmission per configured grant usually, which means the gNB cannot trigger the aperiodic SRS transmission for the uplink channel quality measurement based on the timely PDCCH transmission.
  • the gNB triggers the aperiodic SRS transmission by using a dynamic grant to override a semi-static grant, there is still the considerable delay due to the time spent for triggering the SRS transmission, measuring one or more SRSs, and scheduling the uplink transmission based on the measurement results.
  • the total delay may take a large ratio to the maximum channel occupation time (MCOT) .
  • Fig. 2 a diagram illustrating an example of link adaptation according to some embodiments of the present disclosure. Similar to Fig. 1, the example shown in Fig. 2 may be applicable to a NR scenario where a UE is operated in an unlicensed carrier. As shown in Fig. 2, the subcarrier spacing may be set as 30KHz and the MCOT is 6ms. It will be appreciated that there may be other scenarios where the communication network may apply or support various radio interface technologies and settings of network parameters.
  • a gNB can provide semi-static scheduling configurations of uplink transmission (TX) to the UE.
  • the UE can perform the uplink transmission with a configured grant (which is also known as a semi-static grant) , for example, in the first three slots.
  • the gNB may transmit a dynamic grant to the UE to trigger the aperiodic SRS transmission for the uplink channel quality measurement.
  • the UE can use the dynamic grant to override the configured grant, and perform the uplink transmission using the dynamic grant.
  • the gNB can schedule the SRS transmission for the uplink channel status measurement after the first PUSCH transmission using the configured grant in the unlicensed carrier, as shown in Fig. 2. Then the gNB can schedule the uplink transmission of the UE based on the new measurement on the SRS transmitted from the UE.
  • the scheduled uplink transmission based on the new measurement may achieve the optimal link adaptation.
  • the SRS transmission from the UE is scheduled immediately after the first PUSCH transmission using the configured grant
  • half of the PUSCH transmissions still suffer sub-optimal link adaptation if the scheduling delay is 2 slots and the UE takes a whole MCOT of 6ms.
  • the period of optimal link adaptation is even shorter when the uplink transmission is shorter. Therefore, it may be desirable to introduce an effective solution to enable quick channel measurement by the gNB, so that an optimal link adaptation can be achieved as early as possible. This may be more important to more burst like traffics.
  • Fig. 3 is a diagram illustrating an example of link adaptation improvement according to some embodiments of the present disclosure.
  • the example shown in Fig. 3 may be applicable to a NR scenario where a UE can support the licensed assisted operation and/or the standalone unlicensed operation.
  • the UE may be operated in an unlicensed carrier.
  • the subcarrier spacing may be set as 30KHz and the MCOT is 6ms.
  • the communication network may apply or support various radio interface technologies and settings of network parameters.
  • the solution of link adaptation improvement according to Fig. 3 is also applicable for the LTE unlicensed operation.
  • the autonomous uplink transmission of the UE can be semi-statically scheduled by a gNB, for example, according to CS Type 1 or CS Type 2.
  • the gNB also can preconfigure an SRS transmission for the autonomous uplink transmission.
  • the UE can perform the preconfigured aperiodic SRS transmission along with the associated uplink data transmission which uses a configured grant.
  • the preconfigured aperiodic SRS transmission from the UE can enable the gNB to perform the uplink channel measurement as early as possible.
  • the gNB can issue a dynamic grant immediately to the UE, for example, via a specific primary channel.
  • the UE can use the dynamic grant to override the configured grant, so as to achieve the optimal link adaptation.
  • the gNB can enable early SRS transmission for the uplink channel measurement by preconfiguring or semi-statically scheduling the SRS transmission for the associated uplink data transmission.
  • Fig. 3 also shows the link adaptation improvement in comparison to Fig. 2. For example, the duration for optimal link adaptation increases from 6 slots to 9 slots when the UE takes a whole MCOT (i.e. 12 slots in Fig. 3) . The relative gain from the link adaptation improvement can be expected to be even larger if the UE takes more than 3 slots but fewer slots than the MCOT.
  • Fig. 4 is a flowchart illustrating a method 400 according to some embodiments of the present disclosure.
  • the method 400 illustrated in Fig. 4 may be performed by an apparatus implemented in a network node or communicatively coupled to a network node.
  • the network node may comprise a base station such as eNB/gNB.
  • the network node can configure radio resources for a terminal device such as UE.
  • the network node can grant radio resources to the terminal device, and issue an uplink grant (such as a static, semi-static or dynamic grant) to schedule uplink transmission from the terminal device.
  • an uplink grant such as a static, semi-static or dynamic grant
  • the network node can determine configuration information of SRS transmission from a terminal device to the network node, as shown in block 402.
  • the configuration information can enable the terminal device to: trigger the SRS transmission, in response to an uplink data transmission to be performed according to semi-static uplink resource allocation.
  • the uplink data transmission and the SRS transmission may be performed in an unlicensed carrier.
  • the uplink data transmission according to the semi-static resource allocation may comprise data transmission based on the CS for NR, the SPS for LTE, or any other scheduling scheme which can allocate periodical uplink grants for the terminal device.
  • the configuration information of the SRS transmission can be transmitted from the network node to the terminal device, as shown in block 404.
  • the transmission of the configuration information may comprise: transmitting at least part of the configuration information to the terminal device in an information element (IE) such as a radio resource control (RRC) IE.
  • IE information element
  • RRC radio resource control
  • the network node can use this IE to indicate the semi-static uplink resource allocation for the uplink data transmission such as autonomous uplink transmission.
  • the configuration information may indicate one or more resource units for the SRS transmission.
  • the configuration information may comprise an indication of whether or not beamforming is applicable for the SRS transmission.
  • the configuration information may also indicate one or more power control parameters (such as the target received power density and the scaling factor of the path loss) for the SRS transmission.
  • the configuration information may comprise one or more parameters transmitted via RRC signaling to configure the SRS transmission. Based at least in part on the one or more parameters, the SRS transmission may be triggered and performed at the appropriate point. For example, in the case that the SRS transmission is preconfigured via the RRC signaling without additional activation information for the SRS transmission, the terminal device can automatically trigger and perform the SRS transmission in the same slot or mini-slot when it transmits uplink data via PUSCH using a semi-static grant.
  • the configuration information may further comprise an indicator transmitted in an activation command of the uplink data transmission to enable or disable the SRS transmission associated with the uplink data transmission.
  • the indicator may comprise one or more bits in the PDCCH for configuring the uplink data transmission.
  • the terminal device can enable the triggering of the SRS transmission according to the configuration information, and perform the SRS transmission when it transmits uplink data via PUSCH using a semi-static grant.
  • the configuration information may further comprise an activation instruction transmitted in downlink control information specified for the SRS transmission.
  • the activation instruction may comprise a specific PDCCH instruction (or signaling) which can be used to activate the SRS transmission for the associated uplink data transmission.
  • the configuration information may indicate the terminal device to transmit an SRS in a starting resource unit in time domain within a transmission opportunity preconfigured for the uplink data transmission.
  • the network node can configure the SRS transmission to be prior to front loaded in the PUSCH transmission which uses a semi-static grant.
  • the SRS transmission may be configured in the first orthogonal frequency division multiplexing (OFDM) symbol during a transmission opportunity for uplink data of the terminal device.
  • OFDM orthogonal frequency division multiplexing
  • the network node can detect the SRS transmission from the terminal device, as shown in block 406.
  • the SRS transmission may be detected upon reception of uplink data from the terminal device.
  • the network node can determine a starting point of the uplink data based at least in part on the detection of the SRS transmission.
  • the network node such as gNB can use the front-loaded SRS from a UE for starting point detection of the UE’s data in the semi-statically allocated resource.
  • the network node can measure one or more SRSs in response to the detection of the SRS transmission.
  • the one or more SRSs may be transmitted according to a predefined pattern by the terminal device respectively within one or more transmission opportunities preconfigured for the uplink data transmission.
  • the SRS (s) measured by the network node may be transmitted in part or all of PUSCH transmission opportunities which use the semi-statically allocated resources.
  • the network node can determine dynamic uplink resource allocation for the terminal device based at least in part on the measurement of the one or more SRSs.
  • the terminal device may be notified of the dynamic uplink resource allocation, so as to enable the terminal device to override or replace at least the semi-static uplink resource allocation with the dynamic uplink resource allocation.
  • the terminal device may use the dynamically allocated resource to override both the semi-statically allocated resource for the uplink data transmission and the radio resource allocated according to the configuration information of the SRS transmission.
  • the network node may receive uplink data from the terminal device in one or more resource units initially configured for the SRS transmission.
  • Fig. 5 is a flowchart illustrating another method 500 according to some embodiments of the present disclosure.
  • the method 500 illustrated in Fig. 5 may be performed by an apparatus implemented in a terminal device or communicatively coupled to a terminal device.
  • the terminal device such as UE may be configured with radio resources in the licensed bands and/or the unlicensed bands by a network node such as eNB/gNB.
  • the terminal device may obtain an uplink grant (such as a static, semi-static or dynamic grant) from the network node to schedule uplink transmission.
  • the terminal device may receive, from a network node, configuration information of SRS transmission from the terminal device to the network node, as shown in block 502.
  • the configuration information can enable the terminal device to: trigger the SRS transmission, in response to an uplink data transmission to be performed according to semi-static uplink resource allocation.
  • the terminal device may receive one or more parameters in the configuration information via RRC signaling to configure the SRS transmission.
  • the configuration information may comprise any combination of the following information: one or more continued/discontinued resource units in frequency and/or time domain configured for the SRS transmission, an indication of whether or not beamforming is applicable for the SRS transmission, and one or more power control parameters for the SRS transmissions.
  • the SRS transmission and the associated uplink data transmission may be performed in an unlicensed carrier.
  • the terminal device may receive at least part of the configuration information from the network node in an IE which indicates the semi-static uplink resource allocation for the uplink data transmission.
  • the terminal device may further receive an indicator in an activation command (such as PDCCH) of the uplink data transmission to enable or disable the SRS transmission associated with the uplink data transmission.
  • the terminal device may also receive a specific PDCCH instruction or signaling to activate the SRS transmission.
  • the terminal device can arrange the SRS transmission based at least in part on the configuration information, as shown in block 504.
  • the arrangement of the SRS transmission may comprise reserving radio resources for the SRS transmission and enabling some related functions, so that the terminal device can trigger the SRS transmission for autonomous uplink transmission at the appropriate point according to the configuration information.
  • the terminal device may arrange the SRS transmission to be performed upon the uplink data transmission. For example, an SRS may be interleaved with uplink data symbols.
  • the terminal device may arrange the SRS transmission to be performed prior to the uplink data transmission.
  • the SRS transmission may be arranged in a starting resource unit in time domain within a transmission opportunity preconfigured for the uplink data transmission.
  • the terminal device may transmit one or more SRSs according to a predefined or pre-configured pattern to the network node respectively within one or more transmission opportunities preconfigured for the uplink data transmission. For example, the terminal device may transmit an SRS once upon each PUSCH transmission opportunity using the semi-static grant. Alternatively, the terminal device may only transmit an SRS once upon the first usable PUSCH transmission opportunity using the semi-static grant. Optionally, the terminal device may transmit an SRS upon each transmission opportunity within a subset of PUSCH transmission opportunities, such as every odd PUSCH transmission opportunity using the semi-static grant.
  • the one or more SRSs transmitted from the terminal device can enable the network node to measure channel quality for the uplink data transmission and perform dynamic uplink resource allocation based at least in part on measurement of the one or more SRSs.
  • the terminal device can obtain the dynamic uplink resource allocation from the network node, and use the dynamic uplink resource allocation to override at least the semi-static uplink resource allocation.
  • the terminal device may also use a dynamic uplink grant to override a radio resource configured for the SRS transmission.
  • the dynamic uplink grant could be sent to the terminal device via another licensed/unlicensed primary channel.
  • the terminal device may perform rate matching to map uplink data (e.g., data symbols) into one or more resource units initially configured for the SRS transmission.
  • the terminal device may transmit the mapped uplink data (e.g., via PUSCH) to the network node without transmitting an SRS.
  • the proposed solution according to one or more exemplary embodiments can enable a network node such as gNB to preconfigure SRS transmission for the autonomous uplink transmission of a UE, so that the gNB can quickly perform channel quality measurement based on the timely SRS transmission.
  • the timely SRS transmission can be triggered upon a semi-static grant for the UE.
  • the SRS transmission may be configured via a new activation command and performed with one or more semi-static grants.
  • the gNB can achieve the uplink measurement results as early as possible for the optimal link adaptation.
  • Figs. 4-5 may be viewed as method steps, and/or as operations that result from operation of computer program code, and/or as a plurality of coupled logic circuit elements constructed to carry out the associated function (s) .
  • the schematic flow chart diagrams described above are generally set forth as logical flow chart diagrams. As such, the depicted order and labeled steps are indicative of specific embodiments of the presented methods. Other steps and methods may be conceived that are equivalent in function, logic, or effect to one or more steps, or portions thereof, of the illustrated methods. Additionally, the order in which a particular method occurs may or may not strictly adhere to the order of the corresponding steps shown.
  • Fig. 6 is a block diagram illustrating an apparatus 600 according to various embodiments of the present disclosure.
  • the apparatus 600 may comprise one or more processors such as processor 601 and one or more memories such as memory 602 storing computer program codes 603.
  • the memory 602 may be non-transitory machine/processor/computer readable storage medium.
  • the apparatus 600 may be implemented as an integrated circuit chip or module that can be plugged or installed into a network node as described with respect to Fig. 4, or a terminal device as described with respect to Fig. 5.
  • the one or more memories 602 and the computer program codes 603 may be configured to, with the one or more processors 601, cause the apparatus 600 at least to perform any operation of the method as described in connection with Fig. 4. In other implementations, the one or more memories 602 and the computer program codes 603 may be configured to, with the one or more processors 601, cause the apparatus 600 at least to perform any operation of the method as described in connection with Fig. 5.
  • the one or more memories 602 and the computer program codes 603 may be configured to, with the one or more processors 601, cause the apparatus 600 at least to perform more or less operations to implement the proposed methods according to the exemplary embodiments of the present disclosure.
  • Fig. 7 is a block diagram illustrating an apparatus 700 according to some embodiments of the present disclosure.
  • the apparatus 700 may comprise a determining unit 701, a transmitting unit 702 and a detecting unit 703.
  • the apparatus 700 may be implemented in a network node such as eNB/gNB.
  • the determining unit 701 may be operable to carry out the operation in block 402
  • the transmitting unit 702 may be operable to carry out the operation in block 404
  • the detecting unit 703 may be operable to carry out the operation in block 406.
  • the determining unit 701, the transmitting unit 702 and/or the detecting unit 703 may be operable to carry out more or less operations to implement the proposed methods according to the exemplary embodiments of the present disclosure.
  • Fig. 8 is a block diagram illustrating an apparatus 800 according to some embodiments of the present disclosure.
  • the apparatus 800 may comprise a receiving unit 801 and an arranging unit 802.
  • the apparatus 800 may be implemented in a terminal device such as UE.
  • the receiving unit 801 may be operable to carry out the operation in block 502
  • the arranging unit 802 may be operable to carry out the operation in block 504.
  • the receiving unit 801 and/or the arranging unit 802 may be operable to carry out more or less operations to implement the proposed methods according to the exemplary embodiments of the present disclosure.
  • Fig. 9 is a block diagram illustrating a telecommunication network connected via an intermediate network to a host computer in accordance with some embodiments of the present disclosure.
  • a communication system includes a telecommunication network 910, such as a 3GPP-type cellular network, which comprises an access network 911, such as a radio access network, and a core network 914.
  • the access network 911 comprises a plurality of base stations 912a, 912b, 912c, such as NBs, eNBs, gNBs or other types of wireless access points, each defining a corresponding coverage area 913a, 913b, 913c.
  • Each base station 912a, 912b, 912c is connectable to the core network 914 over a wired or wireless connection 915.
  • a first UE 991 located in a coverage area 913c is configured to wirelessly connect to, or be paged by, the corresponding base station 912c.
  • a second UE 992 in a coverage area 913a is wirelessly connectable to the corresponding base station 912a. While a plurality of UEs 991, 992 are illustrated in this example, the disclosed embodiments are equally applicable to a situation where a sole UE is in the coverage area or where a sole UE is connecting to the corresponding base station 912.
  • the telecommunication network 910 is itself connected to a host computer 930, which may be embodied in the hardware and/or software of a standalone server, a cloud-implemented server, a distributed server or as processing resources in a server farm.
  • the host computer 930 may be under the ownership or control of a service provider, or may be operated by the service provider or on behalf of the service provider.
  • Connections 921 and 922 between the telecommunication network 910 and the host computer 930 may extend directly from the core network 914 to the host computer 930 or may go via an optional intermediate network 920.
  • An intermediate network 920 may be one of, or a combination of more than one of, a public, private or hosted network; the intermediate network 920, if any, may be a backbone network or the Internet; in particular, the intermediate network 920 may comprise two or more sub-networks (not shown) .
  • the communication system of Fig. 9 as a whole enables connectivity between the connected UEs 991, 992 and the host computer 930.
  • the connectivity may be described as an over-the-top (OTT) connection 950.
  • the host computer 930 and the connected UEs 991, 992 are configured to communicate data and/or signaling via the OTT connection 950, using the access network 911, the core network 914, any intermediate network 920 and possible further infrastructure (not shown) as intermediaries.
  • the OTT connection 950 may be transparent in the sense that the participating communication devices through which the OTT connection 950 passes are unaware of routing of uplink and downlink communications.
  • the base station 912 may not or need not be informed about the past routing of an incoming downlink communication with data originating from the host computer 930 to be forwarded (e.g., handed over) to a connected UE 991. Similarly, the base station 912 need not be aware of the future routing of an outgoing uplink communication originating from the UE 991 towards the host computer 930.
  • Fig. 10 is a block diagram illustrating a host computer communicating via a base station with a UE over a partially wireless connection in accordance with some embodiments of the present disclosure.
  • a host computer 1010 comprises hardware 1015 including a communication interface 1016 configured to set up and maintain a wired or wireless connection with an interface of a different communication device of the communication system 1000.
  • the host computer 1010 further comprises a processing circuitry 1018, which may have storage and/or processing capabilities.
  • the processing circuitry 1018 may comprise one or more programmable processors, application-specific integrated circuits, field programmable gate arrays or combinations of these (not shown) adapted to execute instructions.
  • the host computer 1010 further comprises software 1011, which is stored in or accessible by the host computer 1010 and executable by the processing circuitry 1018.
  • the software 1011 includes a host application 1012.
  • the host application 1012 may be operable to provide a service to a remote user, such as UE 1030 connecting via an OTT connection 1050 terminating at the UE 1030 and the host computer 1010. In providing the service to the remote user, the host application 1012 may provide user data which is transmitted using the OTT connection 1050.
  • the communication system 1000 further includes a base station 1020 provided in a telecommunication system and comprising hardware 1025 enabling it to communicate with the host computer 1010 and with the UE 1030.
  • the hardware 1025 may include a communication interface 1026 for setting up and maintaining a wired or wireless connection with an interface of a different communication device of the communication system 1000, as well as a radio interface 1027 for setting up and maintaining at least a wireless connection 1070 with the UE 1030 located in a coverage area (not shown in Fig. 10) served by the base station 1020.
  • the communication interface 1026 may be configured to facilitate a connection 1060 to the host computer 1010.
  • the connection 1060 may be direct or it may pass through a core network (not shown in Fig.
  • the hardware 1025 of the base station 1020 further includes a processing circuitry 1028, which may comprise one or more programmable processors, application-specific integrated circuits, field programmable gate arrays or combinations of these (not shown) adapted to execute instructions.
  • the base station 1020 further has software 1021 stored internally or accessible via an external connection.
  • the communication system 1000 further includes the UE 1030 already referred to.
  • Its hardware 1035 may include a radio interface 1037 configured to set up and maintain a wireless connection 1070 with a base station serving a coverage area in which the UE 1030 is currently located.
  • the hardware 1035 of the UE 1030 further includes a processing circuitry 1038, which may comprise one or more programmable processors, application-specific integrated circuits, field programmable gate arrays or combinations of these (not shown) adapted to execute instructions.
  • the UE 1030 further comprises software 1031, which is stored in or accessible by the UE 1030 and executable by the processing circuitry 1038.
  • the software 1031 includes a client application 1032.
  • the client application 1032 may be operable to provide a service to a human or non-human user via the UE 1030, with the support of the host computer 1010.
  • an executing host application 1012 may communicate with the executing client application 1032 via the OTT connection 1050 terminating at the UE 1030 and the host computer 1010.
  • the client application 1032 may receive request data from the host application 1012 and provide user data in response to the request data.
  • the OTT connection 1050 may transfer both the request data and the user data.
  • the client application 1032 may interact with the user to generate the user data that it provides.
  • the host computer 1010, the base station 1020 and the UE 1030 illustrated in Fig. 10 may be similar or identical to the host computer 930, one of base stations 912a, 912b, 912c and one of UEs 991, 992 of Fig. 9, respectively.
  • the inner workings of these entities may be as shown in Fig. 10 and independently, the surrounding network topology may be that of Fig. 9.
  • the OTT connection 1050 has been drawn abstractly to illustrate the communication between the host computer 1010 and the UE 1030 via the base station 1020, without explicit reference to any intermediary devices and the precise routing of messages via these devices.
  • Network infrastructure may determine the routing, which it may be configured to hide from the UE 1030 or from the service provider operating the host computer 1010, or both. While the OTT connection 1050 is active, the network infrastructure may further take decisions by which it dynamically changes the routing (e.g., on the basis of load balancing consideration or reconfiguration of the network) .
  • Wireless connection 1070 between the UE 1030 and the base station 1020 is in accordance with the teachings of the embodiments described throughout this disclosure.
  • One or more of the various embodiments improve the performance of OTT services provided to the UE 1030 using the OTT connection 1050, in which the wireless connection 1070 forms the last segment. More precisely, the teachings of these embodiments may improve the latency and the power consumption, and thereby provide benefits such as lower complexity, reduced time required to access a cell, better responsiveness, extended battery lifetime, etc.
  • a measurement procedure may be provided for the purpose of monitoring data rate, latency and other factors on which the one or more embodiments improve.
  • the measurement procedure and/or the network functionality for reconfiguring the OTT connection 1050 may be implemented in software 1011 and hardware 1015 of the host computer 1010 or in software 1031 and hardware 1035 of the UE 1030, or both.
  • sensors may be deployed in or in association with communication devices through which the OTT connection 1050 passes; the sensors may participate in the measurement procedure by supplying values of the monitored quantities exemplified above, or supplying values of other physical quantities from which the software 1011, 1031 may compute or estimate the monitored quantities.
  • the reconfiguring of the OTT connection 1050 may include message format, retransmission settings, preferred routing etc. ; the reconfiguring need not affect the base station 1020, and it may be unknown or imperceptible to the base station 1020. Such procedures and functionalities may be known and practiced in the art.
  • measurements may involve proprietary UE signaling facilitating the host computer 1010’s measurements of throughput, propagation times, latency and the like.
  • the measurements may be implemented in that the software 1011 and 1031 causes messages to be transmitted, in particular empty or ‘dummy’ messages, using the OTT connection 1050 while it monitors propagation times, errors etc.
  • Fig. 11 is a flowchart illustrating a method implemented in a communication system, in accordance with an embodiment.
  • the communication system includes a host computer, a base station and a UE which may be those described with reference to Fig. 9 and Fig. 10. For simplicity of the present disclosure, only drawing references to Fig. 11 will be included in this section.
  • the host computer provides user data.
  • substep 1111 (which may be optional) of step 1110, the host computer provides the user data by executing a host application.
  • the host computer initiates a transmission carrying the user data to the UE.
  • step 1130 the base station transmits to the UE the user data which was carried in the transmission that the host computer initiated, in accordance with the teachings of the embodiments described throughout this disclosure.
  • step 1140 the UE executes a client application associated with the host application executed by the host computer.
  • Fig. 12 is a flowchart illustrating a method implemented in a communication system, in accordance with an embodiment.
  • the communication system includes a host computer, a base station and a UE which may be those described with reference to Fig. 9 and Fig. 10. For simplicity of the present disclosure, only drawing references to Fig. 12 will be included in this section.
  • the host computer provides user data.
  • the host computer provides the user data by executing a host application.
  • the host computer initiates a transmission carrying the user data to the UE.
  • the transmission may pass via the base station, in accordance with the teachings of the embodiments described throughout this disclosure.
  • step 1230 (which may be optional) , the UE receives the user data carried in the transmission.
  • Fig. 13 is a flowchart illustrating a method implemented in a communication system, in accordance with an embodiment.
  • the communication system includes a host computer, a base station and a UE which may be those described with reference to Fig. 9 and Fig. 10. For simplicity of the present disclosure, only drawing references to Fig. 13 will be included in this section.
  • step 1310 the UE receives input data provided by the host computer. Additionally or alternatively, in step 1320, the UE provides user data.
  • substep 1321 (which may be optional) of step 1320, the UE provides the user data by executing a client application.
  • substep 1311 (which may be optional) of step 1310, the UE executes a client application which provides the user data in reaction to the received input data provided by the host computer.
  • the executed client application may further consider user input received from the user.
  • the UE initiates, in substep 1330 (which may be optional) , transmission of the user data to the host computer.
  • step 1340 of the method the host computer receives the user data transmitted from the UE, in accordance with the teachings of the embodiments described throughout this disclosure.
  • Fig. 14 is a flowchart illustrating a method implemented in a communication system, in accordance with an embodiment.
  • the communication system includes a host computer, a base station and a UE which may be those described with reference to Fig. 9 and Fig. 10. For simplicity of the present disclosure, only drawing references to Fig. 14 will be included in this section.
  • the base station receives user data from the UE.
  • the base station initiates transmission of the received user data to the host computer.
  • step 1430 (which may be optional) , the host computer receives the user data carried in the transmission initiated by the base station.
  • the various exemplary embodiments may be implemented in hardware or special purpose chips, circuits, software, logic or any combination thereof.
  • some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device, although the disclosure is not limited thereto.
  • firmware or software which may be executed by a controller, microprocessor or other computing device, although the disclosure is not limited thereto.
  • While various aspects of the exemplary embodiments of this disclosure may be illustrated and described as block diagrams, flow charts, or using some other pictorial representation, it is well understood that these blocks, apparatus, systems, techniques or methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
  • the exemplary embodiments of the disclosure may be practiced in various components such as integrated circuit chips and modules. It should thus be appreciated that the exemplary embodiments of this disclosure may be realized in an apparatus that is embodied as an integrated circuit, where the integrated circuit may comprise circuitry (as well as possibly firmware) for embodying at least one or more of a data processor, a digital signal processor, baseband circuitry and radio frequency circuitry that are configurable so as to operate in accordance with the exemplary embodiments of this disclosure.
  • exemplary embodiments of the disclosure may be embodied in computer-executable instructions, such as in one or more program modules, executed by one or more computers or other devices.
  • program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types when executed by a processor in a computer or other device.
  • the computer executable instructions may be stored on a computer readable medium such as a hard disk, optical disk, removable storage media, solid state memory, random access memory (RAM) , etc.
  • RAM random access memory
  • the function of the program modules may be combined or distributed as desired in various embodiments.
  • the function may be embodied in whole or partly in firmware or hardware equivalents such as integrated circuits, field programmable gate arrays (FPGA) , and the like.

Landscapes

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

Abstract

La présente invention concerne un procédé pour des communications. Le procédé, qui peut être mis en œuvre dans un nœud de réseau, comprend la détermination d'informations de configuration pour une transmission d'un signal de référence de sondage d'un dispositif terminal au nœud de réseau. Les informations de configuration peuvent permettre au dispositif terminal de déclencher la transmission du signal de référence de sondage, en réponse à une transmission de données de liaison montante à réaliser selon une attribution semi-statique de ressources de liaison montante. Le procédé comprend en outre la transmission des informations de configuration au dispositif terminal et la détection de la transmission du signal de référence de sondage depuis le dispositif terminal.
PCT/CN2019/090544 2018-08-10 2019-06-10 Procédé et appareil de transmission de signal de référence de sondage WO2020029675A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2018099917 2018-08-10
CNPCT/CN2018/099917 2018-08-10

Publications (1)

Publication Number Publication Date
WO2020029675A1 true WO2020029675A1 (fr) 2020-02-13

Family

ID=69413897

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/090544 WO2020029675A1 (fr) 2018-08-10 2019-06-10 Procédé et appareil de transmission de signal de référence de sondage

Country Status (1)

Country Link
WO (1) WO2020029675A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102316513A (zh) * 2010-07-01 2012-01-11 华为技术有限公司 触发用户设备发送测量参考信号的方法和基站
EP2663150A1 (fr) * 2011-01-07 2013-11-13 Fujitsu Limited Procédé, n ud b évolué et équipement utilisateur pour déclencher un signal de référence de sondage apériodique
CN103945541A (zh) * 2010-02-11 2014-07-23 电信科学技术研究院 触发srs信号发送的方法以及设备
CN106254047A (zh) * 2015-08-31 2016-12-21 北京智谷技术服务有限公司 探测参考信号调度方法、发送方法、及其装置
WO2017116125A1 (fr) * 2015-12-29 2017-07-06 한국전자통신연구원 Procédé et appareil de transmission d'un signal de référence de sondage dans un système de communication sans fil de bande sans licence, et procédé et appareil de déclenchement de la transmission d'un signal de référence de sondage
CN109429346A (zh) * 2017-08-31 2019-03-05 华为技术有限公司 一种探测参考信号的发送方法、接收方法、装置及系统

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103945541A (zh) * 2010-02-11 2014-07-23 电信科学技术研究院 触发srs信号发送的方法以及设备
CN102316513A (zh) * 2010-07-01 2012-01-11 华为技术有限公司 触发用户设备发送测量参考信号的方法和基站
EP2663150A1 (fr) * 2011-01-07 2013-11-13 Fujitsu Limited Procédé, n ud b évolué et équipement utilisateur pour déclencher un signal de référence de sondage apériodique
CN106254047A (zh) * 2015-08-31 2016-12-21 北京智谷技术服务有限公司 探测参考信号调度方法、发送方法、及其装置
WO2017116125A1 (fr) * 2015-12-29 2017-07-06 한국전자통신연구원 Procédé et appareil de transmission d'un signal de référence de sondage dans un système de communication sans fil de bande sans licence, et procédé et appareil de déclenchement de la transmission d'un signal de référence de sondage
CN109429346A (zh) * 2017-08-31 2019-03-05 华为技术有限公司 一种探测参考信号的发送方法、接收方法、装置及系统

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ERICSSON ET AL.: "Further Details on Aperiodic Sounding Reference Signals", 3GPP TSG-RAN WG1 #61BIS, R1-103519, vol. RAN WG1, 22 June 2010 (2010-06-22), XP050449032 *

Similar Documents

Publication Publication Date Title
US11812432B2 (en) Method and apparatus for using indication information of time domain resource allocation
JP7453985B2 (ja) 新無線設定されたアップリンク（ｕｌ）のための時間リソース
US11737036B2 (en) Method and apparatus for using indication information of time domain resource allocation
WO2021057928A1 (fr) Procédé et appareil pour l'accès aléatoire
US11558895B2 (en) Logical channel indicator
US20220104199A1 (en) Method and apparatus for sharing communication channel
CN110050415B (zh) 用于上行链路传送的方法和设备
WO2020259063A1 (fr) Procédé et appareil de prise en charge d'une adaptation de transmission
US20220377809A1 (en) Method and apparatus for random access procedure
US12120670B2 (en) Method and apparatus for self-scheduled uplink transmission
US11522665B2 (en) Feedback transmissions for mixed services
US11395330B2 (en) Method and apparatus for adaptive scheduling and transmission
WO2020029675A1 (fr) Procédé et appareil de transmission de signal de référence de sondage
US12028860B2 (en) Terminal device, network device and methods therein
WO2022001790A1 (fr) Procédé et appareil pour communication multidiffusion
US20230239170A1 (en) Method and apparatus for multicast communication
US20220321263A1 (en) Method and apparatus for random access

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19847930

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19847930

Country of ref document: EP

Kind code of ref document: A1