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WO2017181343A1 - Procédé, système et appareil pour formats de canal basés sur la contention - Google Patents

Procédé, système et appareil pour formats de canal basés sur la contention Download PDF

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Publication number
WO2017181343A1
WO2017181343A1 PCT/CN2016/079657 CN2016079657W WO2017181343A1 WO 2017181343 A1 WO2017181343 A1 WO 2017181343A1 CN 2016079657 W CN2016079657 W CN 2016079657W WO 2017181343 A1 WO2017181343 A1 WO 2017181343A1
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Prior art keywords
contention based
based channel
preamble
user device
determined
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English (en)
Inventor
Hongchao Li
Klaus Ingemann Pedersen
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Nokia Solutions and Networks Oy
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Nokia Solutions and Networks Oy
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Priority to PCT/CN2016/079657 priority Critical patent/WO2017181343A1/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

Definitions

  • the present application relates to a method, apparatus, system and computer program and in particular but not exclusively to contention based (CB) access channel formats.
  • CB contention based
  • a communication system can be seen as a facility that enables communication sessions between two or more entities such as user terminals, base stations/access points and/or other nodes by providing carriers between the various entities involved in the communications path.
  • a communication system can be provided for example by means of a communication network and one or more compatible communication devices.
  • the communication sessions may comprise, for example, communication of data for carrying communications such as voice, electronic mail (email) , text message, multimedia and/or content data and so on.
  • Non-limiting examples of services provided comprise two-way or multi-way calls, data communication or multimedia services and access to a data network system, such as the Internet.
  • At least a part of a communication session between at least two stations occurs over a wireless link.
  • a user can access the communication system by means of an appropriate communication device or terminal.
  • a communication device of a user is often referred to as user equipment (UE) .
  • UE user equipment
  • a communication device is provided with an appropriate signal receiving and transmitting apparatus for enabling communications, for example enabling access to a communication network or communications directly with other users.
  • the communication device may access a carrier provided by a station or access point, and transmit and/or receive communications on the carrier.
  • the communication system and associated devices typically operate in accordance with a given standard or specification which sets out what the various entities associated with the system are permitted to do and how that should be achieved. Communication protocols and/or parameters which shall be used for the connection are also typically defined.
  • Examples of communications systems are UTRAN (3G radio) , long-term evolution (LTE) of the Universal Mobile Telecommunications System (UMTS) radio-access technology and so-called 5G or New Radio (the term used by 3GPP) networks. Standardisation of 5G or New Radio networks is currently under discussion.
  • UTRAN 3G radio
  • LTE long-term evolution
  • UMTS Universal Mobile Telecommunications System
  • 5G or New Radio the term used by 3GPP
  • a method comprising determining, in dependence on channel conditions, a first one of a plurality of contention based channel formats for use by a user device, each of the plurality of contention based channel formats associated with a respective one of a plurality of resource pools and providing information comprising an indication of the first determined contention based channel format to the user device.
  • the method may comprise determining to change the contention based channel format for the user device to a second one of the plurality of contention based channel formats and providing information comprising an indication of the second determined contention based channel format to the user device.
  • the method may comprise determining the association between each of the plurality of contention based channel formats and the respective one of the plurality of resource pools.
  • the information may comprise an indication of the association, the user device being configured with one of the plurality of resource pools such that the user device is able to determine to use the contention based channel format associated with the configured resource pool.
  • the method may comprise providing information comprising an indication of the determined association to a serving cell.
  • the method may comprise receiving information comprising an indication of an association between each of the plurality of contention based channel formats and a respective one of the plurality of resource pools from a serving cell and using the information in the determining the respective one of a plurality of contention based channel formats for use by a user device.
  • the contention based channel format may be defined by at least one of physical granularity in the time domain, physical granularity in the frequency domain, data part duration, modulation and coding scheme level and payload size.
  • the contention based channel format may include a preamble and may be defined by at least one of preamble duration, preamble subcarrier spacing, preamble sequence length, preamble sequence generation related parameters, preamble CP duration and preamble guard period duration.
  • the channel conditions may comprise at least one of estimated collision probability, signal to noise ratio, perceived latency and traffic type.
  • a method comprising receiving information comprising an indication of a first determined one of a plurality of contention based channel formats from a serving cell, the determined contention based channel format determined in dependence on channel conditions, each of the plurality of contention based channel formats associated with a respective one of a plurality of resource pools and using the determined contention based channel format for a contention based transmission.
  • the method may comprise receiving information comprising an indication of a second determined channel format from the serving cell, wherein the serving cell has determined to change the contention based channel format for the user device to a second one of the plurality of contention based channel formats.
  • the information may comprise an indication of the association between each of the plurality of contention based channel formats and a respective one of the plurality of resource pools, the user device being configured with one of the plurality of resource pools such that the user device is able to determine to use the contention based channel format associated with the configured resource pool.
  • the contention based channel format may be defined by at least one of physical granularity in the time domain, physical granularity in the frequency domain, data part duration, modulation and coding scheme level and payload size.
  • the contention based channel format may include a preamble and is defined by at least one of preamble duration, preamble subcarrier spacing, preamble sequence length, preamble sequence generation related parameters, preamble CP duration and preamble guard period duration.
  • the channel conditions may comprise at least one of estimated collision probability, signal to noise ratio, perceived latency and traffic type.
  • an apparatus comprising means for determining, in dependence on channel conditions, a first one of a plurality of contention based channel formats for use by a user device, each of the plurality of contention based channel formats associated with a respective one of a plurality of resource pools and means for providing information comprising an indication of the first determined contention based channel format to the user device.
  • the apparatus may comprise means for determining to change the contention based channel format for the user device to a second one of the plurality of contention based channel formats and means for providing information comprising an indication of the second determined contention based channel format to the user device.
  • the apparatus may comprise means for determining the association between each of the plurality of contention based channel formats and the respective one of the plurality of resource pools.
  • the information may comprise an indication of the association, the user device being configured with one of the plurality of resource pools such that the user device is able to determine to use the contention based channel format associated with the configured resource pool.
  • the apparatus may comprise means for providing information comprising an indication of the determined association to a serving cell.
  • the apparatus may comprise means for receiving information comprising an indication of an association between each of the plurality of contention based channel formats and a respective one of the plurality of resource pools from a serving cell and means for using the information in the determining the respective one of a plurality of contention based channel formats for use by a user device.
  • the contention based channel format may be defined by at least one of physical granularity in the time domain, physical granularity in the frequency domain, data part duration, modulation and coding scheme level and payload size.
  • the contention based channel format may include a preamble and may be defined by at least one of preamble duration, preamble subcarrier spacing, preamble sequence length, preamble sequence generation related parameters, preamble CP duration and preamble guard period duration.
  • the channel conditions may comprise at least one of estimated collision probability, signal to noise ratio, perceived latency and traffic type.
  • an apparatus comprising means for receiving information comprising an indication of a first determined one of a plurality of contention based channel formats from a serving cell, the determined contention based channel format determined in dependence on channel conditions, each of the plurality of contention based channel formats associated with a respective one of a plurality of resource pools and mean for using the determined contention based channel format for a contention based transmission.
  • the apparatus may comprise means for receiving information comprising an indication of a second determined channel format from the serving cell, wherein the serving cell has determined to change the contention based channel format for the user device to a second one of the plurality of contention based channel formats.
  • the information may comprise an indication of the association between each of the plurality of contention based channel formats and a respective one of the plurality of resource pools, the user device being configured with one of the plurality of resource pools such that the user device is able to determine to use the contention based channel format associated with the configured resource pool.
  • the contention based channel format may be defined by at least one of physical granularity in the time domain, physical granularity in the frequency domain, data part duration, modulation and coding scheme level and payload size.
  • the contention based channel format may include a preamble and is defined by at least one of preamble duration, preamble subcarrier spacing, preamble sequence length, preamble sequence generation related parameters, preamble CP duration and preamble guard period duration.
  • the channel conditions may comprise at least one of estimated collision probability, signal to noise ratio, perceived latency and traffic type.
  • an apparatus comprising at least one processor and at least one memory including a computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to determine, in dependence on channel conditions, a first one of a plurality of contention based channel formats for use by a user device, each of the plurality of contention based channel formats associated with a respective one of a plurality of resource pools and provide information comprising an indication of the first determined contention based channel format to the user device.
  • the apparatus may be configured to determine to change the contention based channel format for the user device to a second one of the plurality of contention based channel formats and provide information comprising an indication of the second determined contention based channel format to the user device.
  • the apparatus may be configured to determine the association between each of the plurality of contention based channel formats and the respective one of the plurality of resource pools.
  • the information may comprise an indication of the association, the user device being configured with one of the plurality of resource pools such that the user device is able to determine to use the contention based channel format associated with the configured resource pool.
  • the apparatus may be configured to provide information comprising an indication of the determined association to a serving cell.
  • the apparatus may be configured to receive information comprising an indication of an association between each of the plurality of contention based channel formats and a respective one of the plurality of resource pools from a serving cell and use the information in the determining the respective one of a plurality of contention based channel formats for use by a user device.
  • the contention based channel format may be defined by at least one of physical granularity in the time domain, physical granularity in the frequency domain, data part duration, modulation and coding scheme level and payload size.
  • the contention based channel format may include a preamble and may be defined by at least one of preamble duration, preamble subcarrier spacing, preamble sequence length, preamble sequence generation related parameters, preamble CP duration and preamble guard period duration.
  • the channel conditions may comprise at least one of estimated collision probability, signal to noise ratio, perceived latency and traffic type.
  • an apparatus comprising at least one processor and at least one memory including a computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to receive information comprising an indication of a first determined one of a plurality of contention based channel formats contention based channel format from a serving cell, the determined contention based channel format determined in dependence on channel conditions, each of the plurality of contention based channel formats associated with a respective one of a plurality of resource pools and use the determined contention based channel format for a contention based transmission.
  • the apparatus may be configured to receive information comprising an indication of a second determined channel format from the serving cell, wherein the serving cell has determined to change the contention based channel format for the user device to a second one of the plurality of contention based channel formats.
  • the information may comprise an indication of the association between each of the plurality of contention based channel formats and a respective one of the plurality of resource pools, the user device being configured with one of the plurality of resource pools such that the user device is able to determine to use the contention based channel format associated with the configured resource pool.
  • the contention based channel format may be defined by at least one of physical granularity in the time domain, physical granularity in the frequency domain, data part duration, modulation and coding scheme level and payload size.
  • the contention based channel format may include a preamble and is defined by at least one of preamble duration, preamble subcarrier spacing, preamble sequence length, preamble sequence generation related parameters, preamble CP duration and preamble guard period duration.
  • the channel conditions may comprise at least one of estimated collision probability, signal to noise ratio, perceived latency and traffic type.
  • a computer program embodied on a non-transitory computer-readable storage medium, the computer program comprising program code for controlling a process to execute a process, the process comprising determining, in dependence on channel conditions, a first one of a plurality of contention based channel formats for use by a user device, each of the plurality of contention based channel formats associated with a respective one of a plurality of resource pools and providing information comprising an indication of the first determined contention based channel format to the user device.
  • the process may comprise determining to change the contention based channel format for the user device to a second one of the plurality of contention based channel formats and providing information comprising an indication of the second determined contention based channel format to the user device.
  • the process may comprise determining the association between each of the plurality of contention based channel formats and the respective one of the plurality of resource pools.
  • the information may comprise an indication of the association, the user device being configured with one of the plurality of resource pools such that the user device is able to determine to use the contention based channel format associated with the configured resource pool.
  • the process may comprise providing information comprising an indication of the determined association to a serving cell.
  • the process may comprise receiving information comprising an indication of an association between each of the plurality of contention based channel formats and a respective one of the plurality of resource pools from a serving cell and using the information in the determining the respective one of a plurality of contention based channel formats for use by a user device.
  • the contention based channel format may be defined by at least one of physical granularity in the time domain, physical granularity in the frequency domain, data part duration, modulation and coding scheme level and payload size.
  • the contention based channel format may include a preamble and may be defined by at least one of preamble duration, preamble subcarrier spacing, preamble sequence length, preamble sequence generation related parameters, preamble CP duration and preamble guard period duration.
  • the channel conditions may comprise at least one of estimated collision probability, signal to noise ratio, perceived latency and traffic type.
  • a computer program embodied on a non-transitory computer-readable storage medium, the computer program comprising program code for controlling a process to execute a process, the process comprising receiving information comprising an indication of a first determined one of a plurality of contention based channel formats from a serving cell, the determined contention based channel format determined in dependence on channel conditions, each of the plurality of contention based channel formats associated with a respective one of a plurality of resource pools and using the determined contention based channel format for a contention based transmission.
  • the process may comprise receiving information comprising an indication of a second determined channel format from the serving cell, wherein the serving cell has determined to change the contention based channel format for the user device to a second one of the plurality of contention based channel formats.
  • the information may comprise an indication of the association between each of the plurality of contention based channel formats and a respective one of the plurality of resource pools, the user device being configured with one of the plurality of resource pools such that the user device is able to determine to use the contention based channel format associated with the configured resource pool.
  • the contention based channel format may be defined by at least one of physical granularity in the time domain, physical granularity in the frequency domain, data part duration, modulation and coding scheme level and payload size.
  • the contention based channel format may include a preamble and is defined by at least one of preamble duration, preamble subcarrier spacing, preamble sequence length, preamble sequence generation related parameters, preamble CP duration and preamble guard period duration.
  • the channel conditions may comprise at least one of estimated collision probability, signal to noise ratio, perceived latency and traffic type.
  • a computer program product for a computer comprising software code portions for performing the steps the method of the first and second aspect when said product is run on the computer.
  • a device for a communication system may comprise the apparatus according to the above aspects.
  • Figure 1 shows a schematic diagram of an example communication system comprising a base station and a plurality of communication devices
  • Figure 2 shows a schematic diagram of an example mobile communication device
  • FIG. 3 shows a contention based physical uplink shared channel (CB-PUSCH) performance (error rate against signal to noise ratio (SNR) ) for various demodulation reference signal (DM-RS) length
  • Figure 4 shows a flowchart of an example method according to some embodiments
  • Figure 5 shows a signalling diagram between a UE#1, eNB#1 and eNB#2 according to some embodiments
  • Figure 6 shows a schematic diagram of an example control apparatus
  • a wireless communication system 100 such as that shown in figure 1, mobile communication devices or user equipment (UE) 102, 104, 105 are provided wireless access via at least one base station or similar wireless transmitting and/or receiving node or point.
  • a base station is referred to as an eNodeB B (eNB) in LTE.
  • Base stations are typically controlled by at least one appropriate controller apparatus, so as to enable operation thereof and management of mobile communication devices in communication with the base stations.
  • the controller apparatus may be located in a radio access network (e.g. wireless communication system 100) or in a core network (CN) (not shown) and may be implemented as one central apparatus or its functionality may be distributed over several apparatus.
  • the controller apparatus may be part of the base station and/or provided by a separate entity such as a Radio Network Controller.
  • control apparatus 108 and 109 are shown to control the respective macro level base stations 106 and 107. In some systems, the control apparatus may additionally or alternatively be provided in a radio network controller.
  • base stations 106 and 107 are shown as connected to a wider communications network 113 via gateway 112.
  • a further gateway function may be provided to connect to another network.
  • the smaller base stations 116, 118 and 120 may also be connected to the network 113, for example by a separate gateway function and/or via the controllers of the macro level stations.
  • the base stations 116, 118 and 120 may be pico or femto level base stations or the like. In the example, stations 116 and 118 are connected via a gateway 111 whilst station 120 connects via the controller apparatus 108. In some embodiments, the smaller stations may not be provided.
  • a possible mobile communication device will now be described in more detail with reference to Figure 2 showing a schematic, partially sectioned view of a communication device 200.
  • a communication device is often referred to as user equipment (UE) or terminal.
  • An appropriate mobile communication device may be provided by any device capable of sending and receiving radio signals.
  • Non-limiting examples comprise a mobile station (MS) or mobile device such as a mobile phone or what is known as a ’smart phone’ , a computer provided with a wireless interface card or other wireless interface facility (e.g., USB dongle) , personal data assistant (PDA) or a tablet provided with wireless communication capabilities, or any combinations of these or the like.
  • MS mobile station
  • PDA personal data assistant
  • a mobile communication device may provide, for example, communication of data for carrying communications such as voice, electronic mail (email) , text message, multimedia and so on. Users may thus be offered and provided numerous services via their communication devices. Non-limiting examples of these services comprise two-way or multi-way calls, data communication or multimedia services or simply an access to a data communications network system, such as the Internet. Users may also be provided broadcast or multicast data. Non-limiting examples of the content comprise downloads, television and radio programs, videos, advertisements, various alerts and other information.
  • the mobile device 200 may receive signals over an air or radio interface 207 via appropriate apparatus for receiving and may transmit signals via appropriate apparatus for transmitting radio signals.
  • transceiver apparatus is designated schematically by block 206.
  • the transceiver apparatus 206 may be provided for example by means of a radio part and associated antenna arrangement.
  • the antenna arrangement may be arranged internally or externally to the mobile device.
  • a mobile device is typically provided with at least one data processing entity 201, at least one memory 202 and other possible components 203 for use in software and hardware aided execution of tasks it is designed to perform, including control of access to and communications with access systems and other communication devices.
  • the data processing, storage and other relevant control apparatus can be provided on an appropriate circuit board and/or in chipsets. This feature is denoted by reference 204.
  • the user may control the operation of the mobile device by means of a suitable user interface such as key pad 205, voice commands, touch sensitive screen or pad, combinations thereof or the like.
  • a display 208, a speaker and a microphone can be also provided.
  • a mobile communication device may comprise appropriate connectors (either wired or wireless) to other devices and/or for connecting external accessories, for example hands-free equipment, thereto.
  • the communication devices 102, 104, 105 may access the communication system based on various access techniques.
  • wireless communication systems are architectures standardized by the 3rd Generation Partnership Project (3GPP) .
  • 3GPP 3rd Generation Partnership Project
  • LTE long term evolution
  • UMTS Universal Mobile Telecommunications System
  • 5G 5th Generation
  • Other examples of radio access system comprise those provided by base stations of systems that are based on technologies such as wireless local area network (WLAN) and/or WiMAX (Worldwide Interoperability for Microwave Access) .
  • WLAN wireless local area network
  • WiMAX Worldwide Interoperability for Microwave Access
  • CB contention based
  • PUSCH physical uplink shared channel
  • DM-RS demodulation reference signals
  • Figure 3 illustrates CB-PUSCH detection performance by DM-RS detection, in terms of error rate, with respect to signal to noise ratio (SNR) for three example DM-RS lengths.
  • SNR signal to noise ratio
  • CB-PUSCH with DM-RS assumes the eNB can always decode the DM-RS from the UEs and schedule the UEs with dedicated resources when collision occurs. However, if eNB cannot decode the DM-RS from UEs, the UE may continue with non-adaptive retransmission.
  • MCS modulation and coding scheme
  • CB transmission formats contain general (e.g. preamble and data) payload structures, including studies of how to manage the resource to control the collision probabilities.
  • Figure 4 shows a flowchart of an example method according to some embodiments.
  • the method comprises determining, in dependence on channel conditions, a first one of a plurality of contention based (CB) channel formats for use by a user device, each of the plurality of contention based (CB) channel formats associated with a respective one of a plurality of resource pools.
  • CB contention based
  • the method comprises providing information comprising an indication of the first determined contention based (CB) channel format to the user device.
  • CB contention based
  • the method may be performed by a serving cell, such as an eNB.
  • the user device may use the determined contention based channel format for a contention based transmission.
  • the method may comprise determining the association between each of the plurality of CB channel formats and the respective one of the plurality of resource pools.
  • the information may comprise an indication of the association.
  • the user device may be configured with one of the plurality of resource pools such that the user device is able to determine to use the CB channel format associated with the configured resource pool.
  • the information may be sent using at least one of radio resource control (RRC) signaling, system information blocks (SIB) and physical (PHY) control channel.
  • RRC radio resource control
  • SIB system information blocks
  • PHY physical
  • the method may comprise determining to change the resource pool and the CB channel format for the user device to a second one of the plurality of CB channel formats and associated resource pools.
  • Information comprising an indication of the change i.e. the second determined channel format, may be provided to the user device. If the UE is aware of the respective associations between the CB channel formats and the resource pools, the information may only need to comprise an indication of the change in resource pool.
  • the user device is able to determine to use the CB channel format associated with the resource pool.
  • Information comprising an indication of the resource pool may be provided using a physical control channel, e.g. DCI.
  • the method may comprise providing or receiving information from another serving cell, e.g. eNB.
  • the information may comprise an indication of the association, e.g. the RP and CB channel format configuration and/or change in association at that serving cell.
  • the method may comprise using the information in determining a first or second one of the plurality of CB channel formats for use by the user device or the association between respective channel formats and resource pools.
  • a plurality of CB channel formats are proposed.
  • the plurality of channel formats may adapt to various physical layer resource allocation granularity in both the time domain and the frequency domain.
  • a CB channel format may also be selectively adopted for different latency/link budget requirements and scenarios.
  • the channel conditions may comprise resource pool granularity, estimated collision probability, SNR/link budget, perceived latency (as perceived by the eNB) and/or traffic types. These factors may be used to determine whether to insert a preamble in a certain CB configuration and also the related parameters to use, which defines the CB channel format out of a limited set of formats.
  • the uplink CB transmission from a UE is sent on the complete resource pool (RP) that have been allocated for the UE.
  • RP resource pool
  • the CB channel format may be defined by at least one of physical granularity in the time domain, physical granularity in the frequency domain, data part duration, modulation and coding scheme level and payload size.
  • the CB channel format may be defined by at least one of preamble duration, preamble subcarrier spacing, preamble sequence length, preamble sequence generation related parameters (such as a preamble root index and cyclic shift value where the preamble sequence is a Zadoff-Chu (ZC) sequence) , preamble CP duration and preamble guard period duration.
  • preamble duration a preamble duration
  • preamble subcarrier spacing such as a preamble subcarrier spacing
  • preamble sequence length such as a preamble root index and cyclic shift value where the preamble sequence is a Zadoff-Chu (ZC) sequence
  • preamble CP duration such as a preamble root index and cyclic shift value where the preamble sequence is a Zadoff-Chu (ZC) sequence
  • CB channel formats may be defined by the below channel parameters. These parameters are provided as an example, other suitable channel parameters may be used to define the channel format.
  • Each configured CB channel format is coupled/tied with one of the configured resource pool. They share the physical granularity setting in time/frequency domain, as shown in Table 1;
  • preamble duration which includes the cyclic prefix (CP) and also guard period (GP) ;
  • preamble CP duration in terms of samplings
  • preamble guard period duration in terms of samplings
  • Table 1 shows the parameters for four example CB access transmission formats; 0, 1, 2 and 3.
  • CB transmission formats for 0 and 1 are sent on a bandwidth of 6-PRBs with a transmission of 1 ms (i.e. corresponding to one LTE TTI duration) .
  • the eNB may identify the user from the DM-RS, i.e. there is no need for preamble overhead for these transmission formats.
  • the MCS is different for format 0 and 1, resulting also in different payload sizes.
  • CB transmission formats 2 and 3 may be used for narrow band transmission on only 3 or 2 PRBs with a 2 ms time duration. CB transmission formats 2 and 3 may be attractive for use by uplink coverage challenged UEs. Due to the smaller number of resources for these CB formats, a preamble is provided for the receiving eNB to detect from which user the transmission is coming. Note that as the network is in charge of preamble allocations within each RP for the users, the preambles for the users on the same RP are orthogonal. The preamble here may be different (and much smaller in size) than the preambles used for the random access channel during initial access.
  • the network determines the CB channel format and configures the UEs with the determined CB transmission format (s) .
  • format 0 or 1 together with sufficiently short RP periodicity may achieve latency of up to 1 ms as a minimum.
  • a coverage limited UE may be configured with CB transmission format 2 or 3 since narrower bandwidth may help to achieve higher transmission power spectrum density.
  • channel characteristics a longer CP may be needed for larger multi-path delay
  • cell size link budget impacts whether to use preamble and also which MCS level
  • so on may be taken into account by the network when determining the CB transmission format.
  • the CB transmission formats of the UEs should be identical to guarantee the orthogonality between preambles and/or DM-RS transmitted by different UEs.
  • CB channel format For coordination of inter-cell interference of CB access, it may be desirable for different cells to use the same CB channel formats if the CB access occurs on overlapping RP (s) to preserve and/or protect orthogonality.
  • overlapping RP s
  • such information may be signalled to the neighboring cells; e.g. via the X2 interface between eNBs.
  • the MCS level may be indicated by the eNB via RRC signalling together with the CB channel format configuration or physical layer control signalling (such as downlink control information (DCI)) .
  • DCI downlink control information
  • the proposed UL CB transmission channel formats may enable a network to operate UL contention based transmission with guaranteed detection performance.
  • the new channel formats are incorporated with CB resource management and controlling framework, which may accommodate various requirement and scenarios in terms of resource pool granularity, latency, estimated collision probability, SINR/link budget and/or traffic types.
  • a network may flexibly operate contention based access in various deployment scenarios with different detection performance requirements and collision probabilities.
  • Figure 5 shows an example signalling diagram which may be used according to some embodiments.
  • Figure 5 shows signalling between serving cells eNB#1 and eNB#2, e.g. on an X2 interface, and between eNB#1 and UE#1 by, for example via RRC signalling or DCI.
  • the coordination between serving cells such as eNBs may be employed to reduce inter-cell interference and/or make possible alignments for better sequence orthogonality and detection performance.
  • eNB#1 indicates the determined Contention Based (CB) channel format for each configured RP via RRC signalling, SIB or PHY control channel.
  • CB Contention Based
  • the UE carries out contention based transmission as per the determined CB channel format signalled from the eNB.
  • a serving cell may determine to change the resource pool and CB channel format to a second one of the plurality of CB channel formats and resource pools. For example, if eNB#2 changes the contention based RP and channel format and then indicates this change to eNB#1 via X2 signalling, the eNB may reconfigure the resource and channel format for certain UE’s contention based transmission. If, the resource pool and channel format have already been coupled (that is, the UE has been provided with an indication of the association between each of the plurality of CB channel formats and a respective resource pool) , only the allocated resource information need to be indicated in the reconfiguration signalling. The channel format to be used may then be implicitly changed. The allocated resource information may be provided using DCI.
  • the UE may then change the CB channel format and relocate its CB transmission to the reconfigured resource.
  • the exchanging and coordination between neighbouring eNBs may be considered in the overall procedure.
  • a serving cell may forward to a second serving cell, e.g., eNB#1, information, e.g., via X2 signalling, regarding CB channel formats and resource pool configuration.
  • the information may comprise an indication of the determined association between each of the CB channel formats and a respective one of the plurality of RPs.
  • the serving cell may use the information to determine the respective one of the plurality of CH channel formats or to determine to change the CB channel format to a second one of the plurality of CB channel formats.
  • eNB#1 may reconfigure the used resource pool and CB channel formats to align the configurations between the eNBs for better orthogonality between CB channel preambles and DM-RS in individual cell.
  • the method may comprise providing an indication of the determined CB channel format for use by a user device and/or association between the CB channel format and a resource pool.
  • eNB#1 may feed back to eNB#2 information via X2 signalling regarding CB channel formats and resource pool configuration.
  • a method as described above, with reference to the Figures, may provide a mechanism to allow CB access transmission detection performance to adapt to different scenarios, requirements and/or channel conditions.
  • the method may be implemented in entities on a mobile device as described with respect to figure 2 or control apparatus as shown in Figure 6.
  • the method may be implanted in a single processor 201 or control apparatus or across more than one processor or control apparatus.
  • Figure 6 shows an example of a control apparatus for a communication system, for example to be coupled to and/or for controlling a station of an access system, such as a RAN node, e.g. a base station, (e) node B, a central unit of a cloud architecture or a node of a core network such as an MME or S-GW, a scheduling entity, or a server or host.
  • the control apparatus may be integrated with or external to a node or module of a core network or RAN.
  • base stations comprise a separate control apparatus unit or module.
  • the control apparatus may be another network element such as a radio network controller or a spectrum controller.
  • each base station may have such a control apparatus as well as a control apparatus being provided in a radio network controller.
  • the control apparatus 300 may be arranged to provide control on communications in the service area of the system.
  • the control apparatus 300 comprises at least one memory 301, at least one data processing unit 302, 303 and an input/output interface 304. Via the interface the control apparatus may be coupled to a receiver and a transmitter of the base station.
  • the receiver and/or the transmitter may be implemented as a radio front end or a remote radio head.
  • control apparatus 300 or processor 201 may be configured to execute an appropriate software code to provide the control functions.
  • Control functions may comprise determining, in dependence on channel conditions, a first one of a plurality of CB channel formats for use by a user device, each of the plurality of CB channel formats associated with a respective one of a plurality of resource pools and providing information comprising an indication of the first determined CB channel format to the user device.
  • control functions may comprise receiving information comprising an indication of a first determined one of a plurality of CB channel formats from a serving cell, the determined CB channel format determined in dependence on channel conditions, each of the plurality of CB channel formats associated with a respective one of a plurality of resource pools and using the determined CB channel format for a contention based transmission.
  • the apparatus may be seen to depict the operational entity comprising one or more physically separate devices for executing at least some of the described processes.
  • the apparatus may comprise a remote control unit (RCU) , such as a host computer or a server computer, operatively coupled (e.g. via a wireless or wired network) to a remote radio head (RRH) located in the base station.
  • RCU remote control unit
  • RRH remote radio head
  • at least some of the described processes may be performed by the RCU.
  • the execution of at least some of the described processes may be shared among the RRH and the RCU.
  • the RCU may generate a virtual network through which the RCU communicates with the RRH.
  • virtual net-working may involve a process of combining hardware and software network resources and network functionality into a single, software-based administrative entity, a virtual network.
  • Network virtualization may involve platform virtualization, often combined with resource virtualization.
  • Network virtualization may be categorized as external virtual networking which combines many net-works, or parts of networks, into the server computer or the host computer (i.e. to the RCU) .
  • External network virtualization is targeted to optimized network sharing.
  • Another category is internal virtual networking which provides net-work-like functionality to the software containers on a single system. Virtual networking may also be used for testing the terminal device.
  • the virtual network may provide flexible distribution of operations between the RRH and the RCU.
  • any digital signalprocessing task may be performed in either the RRH or the RCU and the boundary where the responsibility is shifted between the RRH and the RCU may be selected according to implementation.
  • apparatuses may comprise or be coupled to other units or modules etc., such as radio parts or radio heads, used in or for transmission and/or reception.
  • apparatuses have been described as one entity, different modules and memory may be implemented in one or more physical or logical entities.
  • the various embodiments may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects of the invention 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 invention is not limited thereto. While various aspects of the invention 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 embodiments of this invention may be implemented by computer software executable by a data processor of the mobile device, such as in the processor entity, or by hardware, or by a combination of software and hardware.
  • Computer software or program also called program product, including software routines, applets and/or macros, may be stored in any apparatus-readable data storage medium and they comprise program instructions to perform particular tasks.
  • a computer program product may comprise one or more computer-executable components which, when the program is run, are configured to carry out embodiments.
  • the one or more computer-executable components may be at least one software code or portions of it.
  • any blocks of the logic flow as in the Figures may represent program steps, or interconnected logic circuits, blocks and functions, or a combination of program steps and logic circuits, blocks and functions.
  • the software may be stored on such physical media as memory chips, or memory blocks implemented within the processor, magnetic media such as hard disk or floppy disks, and optical media such as for example DVD and the data variants thereof, CD.
  • the physical media is a non-transitory media.
  • the memory may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as semiconductor based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory.
  • the data processors may be of any type suitable to the local technical environment, and may comprise one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) , application specific integrated circuits (ASlC) , FPGA, gate level circuits and processors based on multi core processor architecture, as non-limiting examples.
  • Embodiments of the inventions may be practiced in various components such as integrated circuit modules.
  • the design of integrated circuits is by and large a highly automated process.
  • Complex and powerful software tools are available for converting a logic level design into a semiconductor circuit design ready to be etched and formed on a semiconductor substrate.

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

Abstract

L'invention concerne un procédé qui consiste à déterminer, en fonction de conditions de canal, un premier format parmi une pluralité de formats de canal basés sur la contention, utilisable par un dispositif utilisateur, chaque format de canal basé sur la contention étant associé à un groupe respectif parmi une pluralité de groupes de ressources; et à fournir au dispositif utilisateur des informations comprenant une indication du premier format de canal basé sur la contention déterminé.
PCT/CN2016/079657 2016-04-19 2016-04-19 Procédé, système et appareil pour formats de canal basés sur la contention Ceased WO2017181343A1 (fr)

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Applications Claiming Priority (1)

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PCT/CN2016/079657 WO2017181343A1 (fr) 2016-04-19 2016-04-19 Procédé, système et appareil pour formats de canal basés sur la contention

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101715237A (zh) * 2009-11-05 2010-05-26 中兴通讯股份有限公司 基于竞争的上行传输方法及装置
US20110128928A1 (en) * 2009-11-30 2011-06-02 Ko-Chiang Lin Method and apparatus to improve contention based transmission in a wireless communication network
CN102118189A (zh) * 2009-12-31 2011-07-06 华为技术有限公司 一种基于竞争资源的配置方法和装置
US20110176500A1 (en) * 2010-01-15 2011-07-21 Telefonaktiebolaget L M Ericsson (Publ) Method and Apparatus for Contention-Based Granting in a Wireless Communication Network

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101715237A (zh) * 2009-11-05 2010-05-26 中兴通讯股份有限公司 基于竞争的上行传输方法及装置
US20110128928A1 (en) * 2009-11-30 2011-06-02 Ko-Chiang Lin Method and apparatus to improve contention based transmission in a wireless communication network
CN102118189A (zh) * 2009-12-31 2011-07-06 华为技术有限公司 一种基于竞争资源的配置方法和装置
US20110176500A1 (en) * 2010-01-15 2011-07-21 Telefonaktiebolaget L M Ericsson (Publ) Method and Apparatus for Contention-Based Granting in a Wireless Communication Network

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