WO2014124667A1 - Distribution de canaux de commande - Google Patents

Distribution de canaux de commande Download PDF

Info

Publication number
WO2014124667A1
WO2014124667A1 PCT/EP2013/052870 EP2013052870W WO2014124667A1 WO 2014124667 A1 WO2014124667 A1 WO 2014124667A1 EP 2013052870 W EP2013052870 W EP 2013052870W WO 2014124667 A1 WO2014124667 A1 WO 2014124667A1
Authority
WO
WIPO (PCT)
Prior art keywords
resources
control channel
reference signal
demodulation reference
rep
Prior art date
Application number
PCT/EP2013/052870
Other languages
English (en)
Inventor
Esa Tapani Tiirola
Timo Erkki Lunttila
Klaus Hugl
Original Assignee
Nokia Solutions And Networks Oy
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 Nokia Solutions And Networks Oy filed Critical Nokia Solutions And Networks Oy
Priority to PCT/EP2013/052870 priority Critical patent/WO2014124667A1/fr
Publication of WO2014124667A1 publication Critical patent/WO2014124667A1/fr

Links

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
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • 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
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal

Definitions

  • This disclosure relates to control channel distribution for wireless communications, and more particularly to defining distribution and communication of control information.
  • a communication system can be seen as a facility that enables communication sessions between two or more entities such as fixed or mobile communication devices, machine- type terminals, base stations, servers and/or other communication nodes.
  • a communication system and compatible communicating entities 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.
  • wireless communication system at least a part of communications between stations occurs over a wireless link.
  • wireless systems include public land mobile networks (PLMN) such as cellular networks, satellite based communication systems and different wireless local networks, for example wireless local area networks (WLAN).
  • PLMN public land mobile networks
  • WLAN wireless local area networks
  • a wireless system can be divided into cells or other radio coverage or service areas.
  • a user can access the communication system by means of an appropriate communication device.
  • a communication device of a user is often referred to as user equipment (UE) or terminal.
  • UE user equipment
  • a communication device is provided with an appropriate signal receiving and transmitting arrangement for enabling communications with other parties.
  • a communication device provides a transceiver station that can communicate with another communication node such as e.g. a base station and/or another user equipment.
  • LTE long-term evolution
  • UMTS Universal Mobile Telecommunications System
  • releases The various development stages of the 3GPP LTE specifications are referred to as releases.
  • control channels in the downlink can be used for signalling HARQ-ACK information related to Physical Uplink Shared Channel (PUSCH) transport blocks.
  • PUSCH Physical Uplink Shared Channel
  • LTE uses a hybrid automatic repeat request (HARQ) scheme for error correction.
  • the eNodeB sends a HARQ indicator to the UE to indicate a positive acknowledgement (ACK) or negative acknowledgement (NACK) for previous data sent using the uplink shared channel.
  • the channel coded HARQ indicator codeword is transmitted through the Physical Hybrid Automatic Repeat Request Indicator Channel (PHICH).
  • PHICH Physical Hybrid Automatic Repeat Request Indicator Channel
  • NCT New Carrier Type
  • CRS Common (Cell Specific) Reference Signals
  • EPCCH Enhanced Physical Downlink Control Channel
  • DM-RS UE-specific demodulation reference signals
  • a signalling channel carrying the HARQ-ACK in the downlink using the New Carrier Type and / or EPDCCH is denoted here as the EPHICH (Enhanced Physical Hybrid-ARQ Indi- cator Channel).
  • EPHICH design There are number of properties for the EPHICH design. These include network energy savings, interference coordination among neighboring cells and support for Heterogeneous networks (HetNet). Furthermore the EPHICH designs should meet or exceed the same basic requirements as the PHICH in terms of performance (10 -3 target BER), ca- pacity (number of scheduled users), overhead and configurability. Additionally the
  • EPHICH designs should demonstrate properties such as smooth coexistence with EPDCCH, CoMP and other advantageous features of the evolving LTE-Advanced standards.
  • Embodiments of the invention aim to address one or several of the above issues.
  • a method for control channel distribution for wireless communications comprising: defining a first set of resources associated with a first control channel, the first control channel first set of resources further associated with at least one demodulation reference signal; selecting from the first set of resources a second set of resources associated with a second control channel; and using the at least one demodulation reference signal associated with the first set of resources for the selected second set of resources as the at least one demodulation reference signal associated with the second control channel.
  • the first control channel may be an Enhanced Physical Downlink Control Channel (EPDCCH)
  • the second control channel may be an Enhanced Physical Hybrid Automatic Repeat Request Indicator Channel (EPHICH).
  • the resources may be physical resource block pairs (PRB).
  • PRB physical resource block pairs
  • the first set of resources associated with the first control channel may form a search space within which information on the first control channel is transmitted.
  • the search space may define at least one of: a common search space for the first control channel; and a user specific search space for the first control channel.
  • Selecting from the first set of resources a second set of resources associated with a second control channel may comprise selecting from the first set of resources the second set of resources which maximise the frequency diversity for a defined number of code block repetitions of the second control channel.
  • Selecting from the first set of resources the second set of resources which maximise the frequency diversity for a defined number of code block repetitions may comprise selecting the second set of resources such that the second set of resources selected comprise the largest number of different physical resource blocks.
  • Selecting from the first set of resources a second set of resources associated with a se- cond control channel may comprise selecting the second set of resources such that a selected resource within the second set of resources is not adjacent to a further selected resource within the second set of resources.
  • Selecting from the first set of resources a second set of resources associated with a se- cond control channel may comprise selecting 12/SF resources, where SF is the spreading factor associated with the second control channel.
  • Selecting from the first set of resources a second set of resources associated with a second control channel may comprise mapping at least one of the resources from the set of resources associated with the first control channel to the set of resources associated with the second control channel.
  • Mapping at least one of the resources from the set of resources associated with the first control channel to the set of resources associated with the second control channel may comprise: determining a number (N) of resources in the first control channel set; determining a number (REP) of repetitions per resource; and generating a PRB pair index mapping for the g'th group of the second control channel based on
  • EPHICH _ PRBs(g) mod mod(g, REP) + REP 8 + REP - [0,1,...,REP
  • Mapping at least one of the resources from the set of resources associated with the first control channel to the set of resources associated with the second control channel may comprise: determining a number (N) of resources in the first control channel set; determining a number (REP) of repetitions; and generating a PRB pair index mapping for the second control channel based on the ratio of resources in the first control channel set to repetitions.
  • Generating an index mapping based on the ratio of resources in the first control channel set to repetitions may comprise at least one of: generating a PRB pair index mapping for the g'th group of the second control channel based on
  • EPHICH _PRBs(g) mod mod(g, V / REP ⁇ ⁇ ) + REP
  • the method may further comprise: embedding information about the selected second set of resources associated with a second control channel into a master information block of system information on a broadcast channel; and transmitting the master information block of system information on the broadcast channel.
  • the method may further comprise transmitting information about the selected second set of resources associated with a second control channel using a radio resource control protocol.
  • the method may further comprise transmitting information about the first set of resources associated with the first control channel using the radio resource control protocol.
  • the method may further comprise defining a third set of resources associated with the first control channel, the third set of resources being the difference between the first set of re- sources and the second set of resources.
  • a method comprising: receiving information defining a first set of resources associated with a first control channel, and at least one demodulation reference signal associated with the first control channel first set of re- sources; receiving further information selecting from the first set of resources a second set of resources associated with a second control channel; and using the at least one demodulation reference signal associated with the first set of resources for the selected second set of resources as the at least one demodulation reference signal associated with the second control channel.
  • the first control channel may be an Enhanced Physical Downlink Control Channel (EPDCCH)
  • the second control channel may be an Enhanced Physical Hybrid Automatic Repeat Request Indicator Channel (EPHICH).
  • EPHICH Enhanced Physical Hybrid Automatic Repeat Request Indicator Channel
  • the resources may be physical resource block pairs (PRB).
  • PRB physical resource block pairs
  • the first set of resources associated with the first control channel may form a search space within which information on the first control channel is transmitted.
  • the search space may define at least one of: a common search space for the first control channel; and a user specific search space for the first control channel.
  • Receiving further information for selecting from the first set of resources a second set of resources associated with a second control channel may comprise receiving information for selecting from the first set of resources the second set of resources which maximise the frequency diversity for a defined number of code block repetitions of the second trol channel.
  • Receiving further information for selecting from the first set of resources the second set of resources which maximise the frequency diversity for a defined number of code block repetitions may comprise receiving information for selecting the second set of resources such that the second set of resources selected comprise the largest number of different physical resource blocks.
  • Receiving further information for selecting from the first set of resources a second set of resources associated with a second control channel may comprises receiving information for selecting the second set of resources such that a selected resource within the second set of resources is not adjacent to a further selected resource within the second set of resources.
  • Receiving further information for selecting from the first set of resources a second set of resources associated with a second control channel may comprise receiving information for selecting 12/SF resources, where SF is the spreading factor associated with the second control channel.
  • Receiving further information for selecting from the first set of resources a second set of resources associated with a second control channel may comprise receiving information mapping at least one of the resources from the set of resources associated with the first control channel to the set of resources associated with the second control channel.
  • Receiving information mapping at least one of the resources from the set of resources associated with the first control channel to the set of resources associated with the second control channel may comprise: determining a number (N) of resources in the first control channel set; determining a number (REP) of repetitions per resource; and generating a PRB pair index mapping for the g'th group of the second control channel based on
  • Receiving information mapping at least one of the resources from the set of resources associated with the first control channel to the set of resources associated with the second control channel may comprise: determining a number (N) of resources in the first control channel set; determining a number (REP) of repetitions; and generating a PRB pair index mapping for the second control channel based on the ratio of resources in the first control channel set to repetitions.
  • Generating an index mapping based on the ratio of resources in the first control channel set to repetitions may comprise at least one of: generating a PRB pair index mapping for the g'th group of the second control channel based on
  • Receiving further information selecting from the first set of resources a second set of resources associated with a second control channel may further comprise receiving the further information embedded within a master information block of system information on a broadcast channel.
  • Receiving further information selecting from the first set of resources a second set of resources associated with a second control channel may further comprise receiving the further information in a radio resource control protocol message.
  • Receiving information defining a first set of resources associated with a first control chan nel may comprises receiving information about the first set of resources associated with the first control channel in a radio resource control protocol message.
  • the method may further comprise defining a third set of resources associated with the first control channel, the third set of resources being the difference between the first set of resources and the second set of resources.
  • an apparatus comprising at least one processor and at least one memory including computer code for one or more programs, the at least one memory and the computer code configured to with the at least one processor to cause the apparatus to at least: define a first set of resources associated with a first con- trol channel, the first control channel first set of resources further associated with at least one demodulation reference signal; select from the first set of resources a second set of resources associated with a second control channel; and use the at least one demodulation reference signal associated with the first set of resources for the selected second set of resources as the at least one demodulation reference signal associated with the second control channel.
  • the first control channel may be an Enhanced Physical Downlink Control Channel (EPDCCH)
  • the second control channel may be an Enhanced Physical Hybrid Automatic Repeat Request Indicator Channel (EPHICH).
  • EPHICH Enhanced Physical Hybrid Automatic Repeat Request Indicator Channel
  • the resources may be physical resource block pairs (PRB).
  • PRB physical resource block pairs
  • the first set of resources associated with the first control channel may form a search space within which information on the first control channel is transmitted.
  • the search space may define at least one of: a common search space for the first control channel; and a user specific search space for the first control channel.
  • Selecting from the first set of resources a second set of resources associated with a second control channel may cause the apparatus to select from the first set of resources the second set of resources which maximise the frequency diversity for a defined number of code block repetitions of the second control channel.
  • Selecting from the first set of resources the second set of resources which maximise the frequency diversity for a defined number of code block repetitions may cause the apparatus to select the second set of resources such that the second set of resources selected comprise the largest number of different physical resource blocks.
  • Selecting from the first set of resources a second set of resources associated with a second control channel may cause the apparatus to map at least one of the resources from the set of resources associated with the first control channel to the set of resources associated with the second control channel.
  • Mapping at least one of the resources from the set of resources associated with the first control channel to the set of resources associated with the second control channel may cause the apparatus to: determine a number (N) of resources in the first control channel set; determine a number (REP) of repetitions per resource; and generate a PRB pair index mapping for the g'th group of the second control channel based on
  • EPHICH _ PRBsig + REP - [0,1,...,REP
  • Mapping at least one of the resources from the set of resources associated with the first control channel to the set of resources associated with the second control channel may cause the apparatus to: determine a number (N) of resources in the first control channel set; determine a number (REP) of repetitions; and generate a PRB pair index mapping for the second control channel based on the ratio of resources in the first control channel set to repetitions.
  • Generating an index mapping based on the ratio of resources in the first control channel set to repetitions may cause the apparatus to perform least one of:
  • EPHICH _PRBs(g) mod(g ⁇ REP + [0, ⁇ ,...,REP - ⁇ ]N), where N/REP ⁇ 2;
  • the apparatus may further be caused to: embed information about the selected second set of resources associated with a second control channel into a master information block of system information on a broadcast channel; and transmit the master information block of system information on the broadcast channel.
  • the apparatus may further be caused to transmit information about the selected second set of resources associated with a second control channel using a radio resource control protocol.
  • the apparatus may further be caused to transmit information about the first set of resources associated with the first control channel using the radio resource control protocol.
  • the apparatus may further be caused to define a third set of resources associated with the first control channel, the third set of resources being the difference between the first set of resources and the second set of resources.
  • an apparatus comprising at least one processor and at least one memory including computer code for one or more programs, the at least one memory and the computer code configured to with the at least one processor to cause the apparatus to at least: receive information defining a first set of resources associated with a first control channel, and at least one demodulation reference signal associated with the first control channel first set of resources; receive further information selecting from the first set of resources a second set of resources associated with a second control channel; and use the at least one demodulation reference signal associated with the first set of resources for the selected second set of resources as the at least one demodulation reference signal associated with the second control channel.
  • the first control channel may be an Enhanced Physical Downlink Control Channel (EPDCCH)
  • the second control channel may be an Enhanced Physical Hybrid Automatic Repeat Request Indicator Channel (EPHICH).
  • the resources may be physical resource block pairs (PRB).
  • the first set of resources associated with the first control channel may form a search space within which information on the first control channel is transmitted.
  • the search space may define at least one of: a common search space for the first control channel; and a user specific search space for the first control channel.
  • Receiving further information for selecting from the first set of resources a second set of resources associated with a second control channel may cause the apparatus to receive information for selecting from the first set of resources the second set of resources which maximise the frequency diversity for a defined number of code block repetitions of the second control channel.
  • Receiving further information for selecting from the first set of resources the second set of resources which maximise the frequency diversity for a defined number of code block repetitions may cause the apparatus to receive information for selecting the second set of resources such that the second set of resources selected comprise the largest number of different physical resource blocks.
  • Receiving further information for selecting from the first set of resources a second set of resources associated with a second control channel may cause the apparatus to receive information for selecting the second set of resources such that a selected resource within the second set of resources is not adjacent to a further selected resource within the se- cond set of resources.
  • Receiving further information for selecting from the first set of resources a second set of resources associated with a second control channel may cause the apparatus to receive information for selecting 12/SF resources, where SF is the spreading factor associated with the second control channel.
  • Receiving further information for selecting from the first set of resources a second set of resources associated with a second control channel may cause the apparatus to receive information mapping at least one of the resources from the set of resources associated with the first control channel to the set of resources associated with the second control channel.
  • Receiving information mapping at least one of the resources from the set of resources associated with the first control channel to the set of resources associated with the second control channel may cause the apparatus to: determine a number (N) of resources in the first control channel set; determine a number (REP) of repetitions per resource; and generate a PRB pair index mapping for the g'th group of the second control channel based on
  • Receiving information mapping at least one of the resources from the set of resources associated with the first control channel to the set of resources associated with the second control channel may cause the apparatus to: determine a number (N) of resources in the first control channel set; determine a number (REP) of repetitions; and generate a PRB pair index mapping for the second control channel based on the ratio of resources in the first control channel set to repetitions.
  • Generating an index mapping based on the ratio of resources in the first control channel set to repetitions may cause the apparatus to perform at least one of: generate a PRB pair index mapping for the g'th group of the second control channel based on
  • Receiving further information selecting from the first set of resources a second set of resources associated with a second control channel may cause the apparatus to receive the further information embedded within a master information block of system information on a broadcast channel.
  • Receiving further information selecting from the first set of resources a second set of resources associated with a second control channel may cause the apparatus to receive the further information in a radio resource control protocol message.
  • Receiving information defining a first set of resources associated with a first control channel may cause the apparatus to receive information about the first set of resources associated with the first control channel in a radio resource control protocol message.
  • the apparatus may be further caused to define a third set of resources associated with the first control channel, the third set of resources being the difference between the first set of resources and the second set of resources.
  • an apparatus comprising: means for defining a first set of resources associated with a first control channel, the first control channel first set of resources further associated with at least one demodulation reference signal;
  • the first control channel may be an Enhanced Physical Downlink Control Channel (EPDCCH)
  • the second control channel may be an Enhanced Physical Hybrid Automatic Repeat Request Indicator Channel (EPHICH).
  • EPHICH Enhanced Physical Hybrid Automatic Repeat Request Indicator Channel
  • the resources may be physical resource block pairs (PRB).
  • PRB physical resource block pairs
  • the first set of resources associated with the first control channel may form a search space within which information on the first control channel is transmitted.
  • the search space may define at least one of: a common search space for the first control channel; and a user specific search space for the first control channel.
  • the means for selecting from the first set of resources a second set of resources associated with a second control channel may comprise means for selecting from the first set of resources the second set of resources which maximise the frequency diversity for a defined number of code block repetitions of the second control channel.
  • the means for selecting from the first set of resources the second set of resources which maximise the frequency diversity for a defined number of code block repetitions may comprise means for selecting the second set of resources such that the second set of resources selected comprise the largest number of different physical resource blocks.
  • the means for selecting from the first set of resources a second set of resources associated with a second control channel may comprise means for selecting the second set of resources such that a selected resource within the second set of resources is not adjacent to a further selected resource within the second set of resources.
  • the means for selecting from the first set of resources a second set of resources associated with a second control channel may comprise means for selecting 12/SF resources, where SF is the spreading factor associated with the second control channel.
  • the means for selecting from the first set of resources a second set of resources associated with a second control channel may comprise means for mapping at least one of the resources from the set of resources associated with the first control channel to the set of resources associated with the second control channel.
  • the means for mapping at least one of the resources from the set of resources associated with the first control channel to the set of resources associated with the second control channel may comprise: means for determining a number (N) of resources in the first control channel set; means for determining a number (REP) of repetitions per resource; and means for generating a PRB pair index mapping for the g'th group of the second control channel based on
  • the means for mapping at least one of the resources from the set of resources associated with the first control channel to the set of resources associated with the second control channel may comprise: means for determining a number (N) of resources in the first control channel set; means for determining a number (REP) of repetitions; and means for generating a PRB pair index mapping for the second control channel based on the ratio of resources in the first control channel set to repetitions.
  • the means for generating an index mapping based on the ratio of resources in the first control channel set to repetitions may comprise at least one of: means for generating a PRB pair index mapping for the g'th group of the second control channel based on
  • EPHICH _PRBs(g) mod mod(g, V I REP ⁇ ⁇ ) + REP
  • the apparatus may further comprise: means for embedding information about the selected second set of resources associated with a second control channel into a master information block of system information on a broadcast channel; and means for transmitting the master information block of system information on the broadcast channel.
  • the apparatus may comprise means for transmitting information about the selected second set of resources associated with a second control channel using a radio resource control protocol.
  • the apparatus may comprise means for transmitting information about the first set of resources associated with the first control channel using the radio resource control protocol.
  • the apparatus may comprise means for defining a third set of resources associated with the first control channel, the third set of resources being the difference between the first set of resources and the second set of resources.
  • an apparatus comprising: means for receiving information defining a first set of resources associated with a first control channel, and at least one demodulation reference signal associated with the first control channel first set of resources; means for receiving further information selecting from the first set of resources a second set of resources associated with a second control channel; and means for using the at least one demodulation reference signal associated with the first set of resources for the selected second set of resources as the at least one demodulation reference signal associated with the second control channel.
  • the first control channel may be an Enhanced Physical Downlink Control Channel (EPDCCH)
  • the second control channel may be an Enhanced Physical Hybrid Automatic Repeat Request Indicator Channel (EPHICH).
  • the resources may be physical resource block pairs (PRB).
  • PRB physical resource block pairs
  • the first set of resources associated with the first control channel may form a search space within which information on the first control channel is transmitted.
  • the search space may define at least one of: a common search space for the first control channel; and a user specific search space for the first control channel.
  • the means for receiving further information for selecting from the first set of resources a second set of resources associated with a second control channel may comprise means for receiving information for selecting from the first set of resources the second set of resources which maximise the frequency diversity for a defined number of code block repetitions of the second control channel.
  • the means for receiving further information for selecting from the first set of resources the second set of resources which maximise the frequency diversity for a defined number of code block repetitions may comprise means for receiving information for selecting the second set of resources such that the second set of resources selected comprise the largest number of different physical resource blocks.
  • the means for receiving further information for selecting from the first set of resources a second set of resources associated with a second control channel may comprise means for receiving information for selecting the second set of resources such that a selected resource within the second set of resources is not adjacent to a further selected resource within the second set of resources.
  • the means for receiving further information for selecting from the first set of resources a second set of resources associated with a second control channel may comprise means for receiving information for selecting 12/SF resources, where SF is the spreading factor associated with the second control channel.
  • the means for receiving further information for selecting from the first set of resources a second set of resources associated with a second control channel may comprise means for receiving information mapping at least one of the resources from the set of resources associated with the first control channel to the set of resources associated with the second control channel.
  • the means for receiving information mapping at least one of the resources from the set of resources associated with the first control channel to the set of resources associated with the second control channel may comprise: means for determining a number (N) of resources in the first control channel set; means for determining a number (REP) of repetitions per resource; and means for generating a PRB pair index mapping for the g'th group of the second control channel based on
  • EPHICH _ PRBs(g) mod mod(g, REP) + REP 2 8 + REP - [0,1,..., REP
  • the means for receiving information mapping at least one of the resources from the set of resources associated with the first control channel to the set of resources associated with the second control channel may comprise: means for determining a number (N) of resources in the first control channel set; means for determining a number (REP) of repetitions; and means for generating a PRB pair index mapping for the second control channel based on the ratio of resources in the first control channel set to repetitions.
  • the means for generating an index mapping based on the ratio of resources in the first control channel set to repetitions may comprise at least one of: means for generating a PRB pair index mapping for the g'th group of the second control channel based on
  • EPHICH _PRBs(g) mod mod(g, ⁇ N / REP ⁇ ⁇ ) + REP
  • the means for receiving further information selecting from the first set of resources a second set of resources associated with a second control channel may comprise means for receiving the further information embedded within a master information block of system information on a broadcast channel.
  • the means for receiving further information selecting from the first set of resources a second set of resources associated with a second control channel may comprise means for receiving the further information in a radio resource control protocol message.
  • the means for receiving information defining a first set of resources associated with a first control channel may comprise means for receiving information about the first set of resources associated with the first control channel in a radio resource control protocol message.
  • the apparatus may further comprise means for defining a third set of resources associated with the first control channel, the third set of resources being the difference between the first set of resources and the second set of resources.
  • an apparatus comprising: a first channel resource determiner configured to define a first set of resources associated with a first control channel, the first control channel first set of resources further associated with at least one demodulation reference signal; a second channel resource determiner configured to select from the first set of resources a second set of resources associated with a second control channel; and a demodulation reference definer configured to use the at least one demodulation reference signal associated with the first set of resources for the selected second set of resources as the at least one demodulation reference signal associated with the second control channel.
  • the first control channel may be an Enhanced Physical Downlink Control Channel
  • the second control channel may be an Enhanced Physical Hybrid Automatic Repeat Request Indicator Channel (EPHICH).
  • EPHICH Enhanced Physical Hybrid Automatic Repeat Request Indicator Channel
  • the resources may be physical resource block pairs (PRB).
  • PRB physical resource block pairs
  • the first set of resources associated with the first control channel may form a search space within which information on the first control channel is transmitted.
  • the search space may define at least one of: a common search space for the first control channel; and a user specific search space for the first control channel.
  • the second channel resource determiner may comprise a resource selector configured to select from the first set of resources the second set of resources which maximise the frequency diversity for a defined number of code block repetitions of the second control channel.
  • the resource selector may be configured to select the second set of resources such that the second set of resources selected comprise the largest number of different physical resource blocks.
  • the second channel resource determiner may comprise a resource selector configured to select the second set of resources such that a selected resource within the second set of resources is not adjacent to a further selected resource within the second set of resources.
  • the second channel resource determiner may comprise a resource selector configured to select 12/SF resources, where SF is the spreading factor associated with the second control channel.
  • the second channel resource determiner may comprise a mapper configured to map at least one of the resources from the set of resources associated with the first control channel to the set of resources associated with the second control channel.
  • the mapper may comprise: a resource determiner configured to determine a number (N) of resources in the first control channel set; a repetition determiner configured to determine a number (REP) of repetitions per resource; and a mapping generator configured to generate a PRB pair index mapping for the g'th group of the second control channel based on
  • EPHICH _ PRBs(g) mod mod(g, REP) + REP 2 8 + REP - [0,1,...,REP
  • the mapper may comprise: a resource determiner configured to determine a number (N) of resources in the first control channel set; a repetition determiner configured to determine a number (REP) of repetitions; and mapping generator configured to generate a PRB pair index mapping for the second control channel based on the ratio of resources in the first control channel set to repetitions.
  • the mapper may comprise at least one of: a mapping generator configured to generate a PRB pair index mapping for the g'th group of the second control channel based on
  • mapping generator configured to generate a PRB pair index mapping for the g'th group of the second control channel based on
  • EPHICH _PRBs(g) mod(g ⁇ REP + [o, ⁇ ,...,REP - lJN), where N/REP ⁇ 2; and a mapping generator configured to generate a PRB pair index mapping for the second control channel with a fixed step size of 1 for a first LREP/NJ * N repetitions and a larger step size for the remaining mod(REP, N) repetitions where N/REP ⁇ 1.
  • the apparatus may further comprise: an embedder configured to embed information about the selected second set of resources associated with a second control channel into a master information block of system information on a broadcast channel; and a transmitter configured to transmit the master information block of system information on the broadcast channel.
  • the apparatus may comprise a transmitter configured to transmit information about the selected second set of resources associated with a second control channel using a radio resource control protocol.
  • the apparatus may comprise a transmitter configured to transmit information about the first set of resources associated with the first control channel using the radio resource control protocol.
  • the apparatus may comprise a remaining resource determiner configured to define a third set of resources associated with the first control channel, the third set of resources being the difference between the first set of resources and the second set of resources.
  • the apparatus may be base station control apparatus.
  • an apparatus comprising: a receiver configured to receive information defining a first set of resources associated with a first control channel, and at least one demodulation reference signal associated with the first control channel first set of resources; the receiver further configured to receive further information selecting from the first set of resources a second set of resources associated with a second control channel; and a demodulator configured to use the at least one demodulation reference signal associated with the first set of resources for the selected second set of resources as the at least one demodulation reference signal associated with the second control channel.
  • the first control channel may be an Enhanced Physical Downlink Control Channel (EPDCCH)
  • the second control channel may be an Enhanced Physical Hybrid Automatic Repeat Request Indicator Channel (EPHICH).
  • EPHICH Enhanced Physical Hybrid Automatic Repeat Request Indicator Channel
  • the resources may be physical resource block pairs (PRB).
  • PRB physical resource block pairs
  • the first set of resources associated with the first control channel may form a search space within which information on the first control channel is transmitted.
  • the search space may define at least one of: a common search space for the first control channel; and a user specific search space for the first control channel.
  • the resource selector may be configured to receive information for selecting the second set of resources such that the second set of resources selected comprise the largest number of different physical resource blocks.
  • the resource selector may be configured to receive information for selecting the second set of resources such that a selected resource within the second set of resources is not adjacent to a further selected resource within the second set of resources.
  • the resource selector may be configured to receive further information for selecting from the first set of resources a second set of resources associated with a second control channel may comprise means for receiving information for selecting 12/SF resources, where SF is the spreading factor associated with the second control channel.
  • the resource selector may be configured to receive receiving information mapping at least one of the resources from the set of resources associated with the first control channel to the set of resources associated with the second control channel.
  • the resource selector may comprise: a resource selector configured to determine a number (N) of resources in the first control channel set; a repetition determiner configured to determine a number (REP) of repetitions; and a mapper configured to generate a PRB pair index mapping for the second control channel based on the ratio of resources in the first control channel set to repetitions.
  • the mapper may comprise at least one of: a mapper configured to generate a PRB pair index mapping for the g'th group of the second control channel based on
  • EPHICH _PRBs(g) mod(g ⁇ REP + [0, ⁇ ,...,REP - ⁇ ]N) , where N/REP ⁇ 2; and a mapper configured to generate a PRB pair index mapping for the second control channel with a fixed step size of 1 for a first LREP/NJ *N repetitions and a larger step size for the remaining mod(REP, N) repetitions where N/REP ⁇ 1.
  • the receiver may be configured to receive the further information embedded within a mas- ter information block of system information on a broadcast channel.
  • the receiver may be configured to receive the further information in a radio resource control protocol message.
  • the receiver may be configured to receive information about the first set of resources associated with the first control channel in a radio resource control protocol message.
  • the apparatus may further comprise a remainder set determiner configured to define a third set of resources associated with the first control channel, the third set of resources being the difference between the first set of resources and the second set of resources.
  • the apparatus may be a user equipment.
  • the nodes can include a base station control apparatus and a mobile device.
  • a computer program comprising program code means adapted to perform the claimed method may also be provided.
  • Figure 1 shows a schematic diagram of a network according to some embodiments
  • Figure 2 shows a schematic diagram of a mobile communication device according to some embodiments
  • Figure 3 shows a schematic diagram of a control apparatus according to some embodiments
  • Figure 4 shows a flow chart according to some embodiments of the operations at a network element
  • Figure 5 shows an example mapping of distributed eCCE to eREG according to some embodiments
  • Figure 6 shows an example PRB mapping pattern for different example EPHICH groups according to some embodiments
  • Figure 7 shows a flow chart according to some embodiments of the allocation or mapping operations at a network element
  • Figure 8 shows an example PRB and eREG mapping pattern for different EPHICH groups for different number of available PRB pairs according to some embodiments
  • Figure 9 shows a flow chart according to some embodiments of the allocation or mapping operations at a network element.
  • Figure 10 shows an example improved mapping of eREG to EPHICH groups according to some embodiments.
  • the existing PHICH design (such as defined within the LTE Rel-8 standard) cannot be implemented as an EPHICH design candidate as such as the CRS used in the existing PHICH designs are not available in the NCT.
  • the existing PDCCH is transmitted on one or several control channel elements (CCEs).
  • CCEs control channel elements
  • a device for example a user equipment, checks predefined locations, aggregation levels, and downlink control information (DCI) formats and acts on messages satisfying predefined criteria. Carrying out such a 'blind decoding' of all the possible combinations would require the device to make many decoding attempts in every subframe, and thus LTE specifications define that each device has only a limited set of control channel element (CCE) locations where a control channel for that device may be placed.
  • the set of CCE locations where a device may find its control channel can be considered as its 'search space'.
  • a search space can be of a different size for each control channel format. Separate dedicated, user specific and common search spaces can also be defined.
  • a dedicated search space can be configured for each device individually (i.e. user specific) while all devices can be informed of the extent and location of a common search space.
  • Such common search space is typically located in a fixed location such that it is possible to address all user devices within a cell using only one signalling message on the control channel.
  • the EPDCCH is multiplexed and based on a fixed number of enhanced control channel elements (eCCEs) per a physical resource block (PRB) pair where the size of each eCCE in terms of number of resource elements adapts to the number of resource elements
  • eCCEs enhanced control channel elements
  • PRB physical resource block
  • REs available in the PRB pair.
  • the adaptation of the eCCE sizes can depend on the presence of legacy signals such as common reference signal (CRS), PDCCH, physical control format indicator channel (PCFICH), and channel state information reference signal (CSI-RS).
  • CRS common reference signal
  • PDCCH Physical control format indicator channel
  • PCFICH physical control format indicator channel
  • CSI-RS channel state information reference signal
  • eREG en- hanced resource element group
  • CDM code division multiplex- ing
  • the effective size of eREG can vary depending on the presence of other signals (such as channel state information reference signal CSI-RS or NCT tracking RS) and also the subframe type (normal, time division duplex [TDD] special subframe).
  • the REs of a single eREG are distributed over a PRB pair as such, which is not very CDM friendly due to time and/or frequency selective channels.
  • the performance of EPHICH varies as well according to eREG resource size.
  • these designs have not taken into account recent decisions related to Distributed and Localized Search Spaces for the EPDCCH.
  • the concept in embodiments as described herein is a method and apparatus for transmitting and receiving HARQ-ACK information in downlink using a New Carrier Type arrangement (in other words having no Common Reference Signals available for coherent detection).
  • EPHICH Enhanced Physical Hybrid ARQ indicator Channel
  • the EPHICH is embedded into the common search space of EPDCCH, for example in some embodiments the EPHICH is embedded into the common search space of a distributed EPDCCH structure although in some embodiments the EPHICH uses the search space of the localized EPDCCH (for example 1 physical resource block [PRB] pair common search space [CSS] for the smallest system bandwidth [BWs] of 1.4MHz/6PRB pairs).
  • the localized EPDCCH for example 1 physical resource block [PRB] pair common search space [CSS] for the smallest system bandwidth [BWs] of 1.4MHz/6PRB pairs.
  • EPHICH detection is based on demodulation reference signal (DM-RS) which are shared with the common search space (CSS).
  • DM-RS demodulation reference signal
  • SCS common search space
  • EPHICH can be designed to share one or more of the DM-RS antenna ports with EPDCCH.
  • EPHICH mapping into the common search space PRB pairs or resources in general is described herein in more detail. However it would be understood that in some embodiments the PRB pairs or resources in general can be part of a user specific search space.
  • a higher layer parameter can be employed to define the number of EPHICH groups.
  • the number of EPHICH groups can be broadcasted in the master information block (MIB).
  • the information can be broadcast on an enhanced Physical broadcast channel (EPBCH).
  • MIB master information block
  • EPBCH enhanced Physical broadcast channel
  • code division multiplexing is applied within the EPHICH group.
  • the CDM component (which in some circumstances is also known as Spreading Factor) applied defines the number of EPHICH resources available per EPHICH group.
  • a determined number of code block repetitions is applied for each EPHICH group.
  • the repetitions follow a defined pattern in the CSS of EPDCCH.
  • repetitions of the same code block are located (as much as possible) in different PRB pairs in the CSS in order to exploit as much as possible the benefits from frequency diversity.
  • the number of code block repetitions is defined by 12/SF (12 divided by the spreading factor) as this defines that a single EPHICH group uses in total 12 Resource Elements.
  • EPHICH groups can be mapped into defined resource elements within each PRB pair corresponding to CSS of EPDCCH in a defined order.
  • the EPDCCH CSS is rate matched around EPHICH, i.e. EPDCCH CSS REs are mapped around EPHICH REs on a given PRB pair. In such a manner all UEs using EPDCCH will have knowledge of the EPHICH location within the CSS of EPDCCH.
  • a method for control channel distribution for wireless communications comprising: defining a first set of resources (for example resource block pairs) associated with a first control channel (such as for example the EPDCCH), the first control channel first set of resources further associated with at least one demodulation reference signal (for example the DM-RS); selecting from the first set of resources a second set of resources associated with a second control channel (for example the EPHICH); and using the at least one demodulation reference signal associated with the first set of resources for the selected second set of resources as the at least one demodulation reference signal associated with the second control channel.
  • a first set of resources for example resource block pairs
  • a first control channel such as for example the EPDCCH
  • the first control channel first set of resources further associated with at least one demodulation reference signal (for example the DM-RS)
  • selecting from the first set of resources a second set of resources associated with a second control channel (for example the EPHICH); and using the at least one demodulation reference signal associated with the first set of resources for the selected second set
  • a wireless communication system mobile communication devices or user equipments (UE) 12, 13 are provided wireless access via at least one base station or similar wireless transmitting and/or receiving node or point.
  • UE user equipments
  • Figure 1 an access system or radio service area of a cellular system 10 provided by a base station 16 are shown.
  • Each mobile communication device and station may have one or more radio channels open at the same time and may send signals to and/or receive signals from more than one source.
  • the radio service area border is schematically shown for illustration purposes only in Figure 1 . It shall be understood that the size and/or shape of a radio service area may vary considerably from that of Figure 1 .
  • 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.
  • control apparatus 18 is shown to control the station 16.
  • the control apparatus can be interconnected with other control entities.
  • the control apparatus is typically provided with memory capacity and at least one data processor.
  • the control apparatus and functions may be distributed between a plurality of control units.
  • LTE long-term evolution
  • UMTS Universal Mobile Telecommunications System
  • 3GPP 3rd Generation Partnership Project
  • LTE-Advanced further development of the LTE is referred to as LTE-Advanced.
  • Non- limiting examples of LTE access nodes are macro level base stations known as enhanced
  • NodeB in the vocabulary of the 3GPP specifications.
  • HeNB Home eNBs
  • pico eNodeBs pico-eNB
  • RRH radio remote heads
  • the LTE employs a mobile architecture known as the Evolved Universal Terrestrial Radio Access Network (E-UTRAN).
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • Base stations of such systems evolved or enhanced Node Bs
  • RLC/MAC/PHY Radio Link Control/Medium Access Control/Physical layer protocol
  • RRC Radio Resource Control
  • RRC Radio Resource Control
  • RRC is used to configure the RLC/MAC and PHY layer at a user equipment and eNodeB.
  • radio access system include 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
  • a possible mobile communication device will now be described in more detail in reference to Figure 2 showing a schematic, partially sectioned view of a communication device 20.
  • 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 include a mobile station (MS) such as a mobile phone or what is known as a 'smart phone', a portable computer provided with a wireless interface card or other wireless interface facility, personal data assistant (PDA) 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, multi- media and so on.
  • the mobile device may receive signals over an air interface 27 via appropriate apparatus for receiving and may transmit signals via appropriate apparatus for transmitting radio signals.
  • transceiver apparatus is designated schematically by block 26.
  • the transceiver apparatus 26 may be provided for example by means of a radio part and as- sociated antenna arrangement.
  • the antenna arrangement may be arranged internally or externally to the mobile device.
  • a mobile device is also typically provided with at least one data processing entity 21 , at least one memory 22 and other possible components 23 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 24.
  • the control apparatus of a user equipment can be configured to process information in association with the enhanced Physical Hybrid ARQ indicator Channel (EPHICH) configuration as well as in some embodiments the enhanced physical downlink control channel (EPDCCH) configuration and mapped enhanced control channel elements to enhanced resource element groups received from a base station accordingly.
  • EPHICH enhanced Physical Hybrid ARQ indicator Channel
  • EPDCCH enhanced physical downlink control channel
  • Figure 3 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.
  • base stations comprise a separate control apparatus.
  • the control apparatus can be another network element.
  • the control apparatus 30 can be arranged to provide control on communications in the service area of the system.
  • the control apparatus 30 can be configured to provide control functions in association with the enhanced Physical Hybrid ARQ indicator Channel (EPHICH) and also in some embodiments the enhanced physical downlink control channel (EPDCCH) configuration and mapping enhanced control channel elements to enhanced resource element groups for user equipment in accordance with certain embodiments described below.
  • the control apparatus comprises at least one memory 31 , at least one data processing unit 32, 33 and an input/output interface 34. Via the interface the control apparatus can be coupled to a receiver and a transmitter of the base station.
  • the control apparatus can be configured to execute an appropriate software code to provide the control functions. It shall be appreciated that similar components can be provided in a control apparatus provided elsewhere in the system.
  • Figure 4 shows a flowchart for operation at for determining EPHICH resources for user equipment.
  • a network element for example the eNodeB or other control apparatus can be configured to determine EPHICH configuration information.
  • the EPHICH configuration information can comprise the information on the CSS PRBs carrying EPHICH and the parameter configuring the number of EPHICH groups.
  • the PRBs or resources can be user specific search space (USS) PRBs carrying EPHICH information and as such the EPHICH configuration information can comprise information on the USS PRBs carrying EPHICH.
  • USS user specific search space
  • step 40 The operation of determining the information is shown in Figure 4 by step 40.
  • the network element can then in some embodiments embed the determined information in the master information block (MI B) of the system information a broadcast channel.
  • MI B master information block
  • PBCH physical broadcast channel
  • EPBCH enhanced physical broadcast channel
  • step 41 The operation of embedding and broadcasting the information is shown in Figure 4 by step 41 .
  • the network element can determine a repetition pattern for EPHICH code blocks in some embodiment by determining a PRB mapping for EPHICH within the CSS of EPDCCH.
  • PRB mapping for EPDCCH There are two main principles to construct PRB mapping for EPDCCH corresponding to a predefined number of code repetitions (the number of repetitions may be defined by 12 divided by the spreading factor).
  • the first principle defines PRB mapping based on the pattern used to construct distributed eCCE structure.
  • the second principle defines PRB mapping based on dedicated EPHICH pattern for the CSS (or USS) of EPDCCH (i.e. not directly linked to distributed eCCE pattern).
  • PRB physical resource block
  • eREG enhanced resource element group
  • eCCEI O 701 is mapped to the blocks highlighted 715 at eREG 1 of PRB2, eREG 3 of PRB3, eREG 5 of PRB4 , eREG 7 of PRB5, eREG 9 of PRB6, eREG 1 1 of PRB7, eREG 13 of PRB0 and eREG 15 of PRB1 .
  • Figure 6 shows an example of PRB mapping pattern (or selection criteria) for the EPHICH groups in line with the distributed EPDCCH mapping.
  • the PRB mapping for one of the EPHICH groups ("#1 " 601 ) is highlighted for illustrative purposes. Following this example, six repetitions are distributed among four PRBs according to a predetermined pattern used to construct distributed eCCE indices of the PHICH groups.
  • the network element can be configured to perform PRB pair map- ping based on a dedicated EPHICH pattern within the CSS of EPDCCH.
  • Figure 7 shows an example method of generating the PRB pair mapping pattern for the EPHICH groups according to some embodiments.
  • the network element can be configured to determine the number of PRBs in the CSS EPDCCH (N) (or a first control channel).
  • step 70 The operation of determining the number of PRBs in the CSS EPDCCH (N) is shown in Figure 7 by step 70.
  • the network element can be configured to determine the number of repetitions (REP).
  • the network element can then allocate or generate a mapping of EPHICH resource groups (or g'th group of a second control channel) according to the following PRB pair mapping operation.
  • EPHICH _ PRBs(g) mod mod(g, REP) + REP 8 + REP - [0, ⁇ ,...,REP wher
  • e N corresponds to number of PRBs of the EPDCCH set
  • REP equals to number of repetitions (three in the example shown in Figure 9 as discussed below)
  • g corresponds to the index of EPHICH group (0, 1 , 7)
  • mod(a,6) denotes the modulo operation (a modulo b)
  • L J is the floor operation (and ⁇ ⁇ denotes the ceil operation correspondingly).
  • the steps given by a fixed offset can for example be generated according to the method described herein with respect to Figure 7.
  • the network element can be configured to generate a mapping according to the following operations.
  • step 70 The operation of determining the number of PRBs in the CSS EPDCCH (N) is shown in Figure 9 by step 70.
  • the network element can be configured to determine the number of repetitions (REP).
  • the network element can then in some embodiments determine whether there are more repetitions than half the PRB pairs. In other words the network element in some embodiments can be configured to determine whether the following is correct: Is (N/REP) ⁇ 2?
  • step 82 The operation of checking the ratio of PRB pairs to repetitions is shown in Figure 9 by step 82.
  • mapping where the check is false is shown in Figure 9 by step 83.
  • the network element can be configured to generate a mapping pattern with "PRB step" of 1.
  • EPHICH _PRBs(g) mod(g ⁇ REP + [0, ⁇ ,...,REP - ⁇ ] N)
  • mapping where the check is true is shown in Figure 9 by step 84.
  • further frequency diversity optimization compared to the generic pattern can be achieved also in the case when the number of repetitions is larger than the number of PRB pairs (REP>/V).
  • An example of such optimization is usage of the pattern with "PRB step" of 1 when (REP>/V).
  • mapping for the predetermined repetitions e.g. last/first (mod(N,REP)
  • mod(N,REP) mod(N,REP)
  • the 'unused' or unselected resources define a third set of resources which can be associated with the first control channel, the EPDCCH.
  • the EPDCCH can be configured to use the 'third set of resources' (the difference between the first set of resources and the second set of resources).
  • the selected or index mapped resources can be signalled using other signalling paths such as using radio resource control (RRC) protocols. This can be used for example to convey the information for the EPHICH resources but also for the EPDCCH resources.
  • RRC radio resource control
  • the required data processing apparatus and functions of a control apparatus for the determinations and control of scheduling of transmission in subframes at a communication device, a base station and any other node or element may be provided by means of one or more data processors.
  • the described functions may be provided by separate proces- sors or by an integrated processor.
  • the data processors may be of any type suitable to the local technical environment, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs), application specific integrated circuits (ASIC), gate level circuits and processors based on multi core processor architecture, as non limiting examples.
  • the data processing may be dis- tributed across several data processing modules.
  • a data processor may be provided by means of, for example, at least one chip.
  • the memory or memories 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.
  • An appropriately adapted computer program code product or products may be used for implementing the embodiments, when loaded or otherwise provided on an appropriate data processing apparatus, for example for selection of appropriate PRB pairs for EPHICH transmission.
  • the program code product for providing the operation may be stored on, provided and embodied by means of an appropriate carrier medium.
  • An appropriate computer program can be embodied on a computer readable record medium. A possibility is to download the program code product via a data network.
  • the various embodi- ments may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Embodiments of the inventions may thus 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.

Landscapes

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

Abstract

L'invention concerne un procédé et un dispositif comprenant : définir un premier ensemble de ressources associé à un premier canal de commande, le premier ensemble de ressources de premier canal de commande étant en outre associé à au moins un signal de référence de démodulation ; sélectionner parmi le premier ensemble de ressources un second ensemble de ressources associé à un second canal de commande ; et utiliser ledit au moins un signal de référence de démodulation associé au premier ensemble de ressources pour le second ensemble sélectionné de ressources en tant que ledit au moins un signal de référence de démodulation associé au second canal de commande.
PCT/EP2013/052870 2013-02-13 2013-02-13 Distribution de canaux de commande WO2014124667A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2013/052870 WO2014124667A1 (fr) 2013-02-13 2013-02-13 Distribution de canaux de commande

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2013/052870 WO2014124667A1 (fr) 2013-02-13 2013-02-13 Distribution de canaux de commande

Publications (1)

Publication Number Publication Date
WO2014124667A1 true WO2014124667A1 (fr) 2014-08-21

Family

ID=47749794

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/052870 WO2014124667A1 (fr) 2013-02-13 2013-02-13 Distribution de canaux de commande

Country Status (1)

Country Link
WO (1) WO2014124667A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9622241B2 (en) 2014-09-26 2017-04-11 Alcatel Lucent Method and apparatus for preventing message collision

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011019960A2 (fr) * 2009-08-12 2011-02-17 Research In Motion Limited Conception de signal de référence de démodulation pour canal partagé de liaison montante physique pour une transmission coordonnée en liaison montante dans un relais de type ii utilisant un signal de référence de démodulation discontinu
US20120008556A1 (en) * 2010-07-09 2012-01-12 Minseok Noh Method and apparatus for transmitting uplink reference signal in a multi-antenna wireless communication system
EP2448143A2 (fr) * 2009-06-26 2012-05-02 LG Electronics Inc. Procédé et dispositif de transmission de signaux de référence dans une transmission de liaison montante à entrées multiples sorties multiples (mimo)
US20130034070A1 (en) * 2010-04-22 2013-02-07 Lg Electronics Inc. Method and apparatus for channel estimation for radio link between a base station and a relay station

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2448143A2 (fr) * 2009-06-26 2012-05-02 LG Electronics Inc. Procédé et dispositif de transmission de signaux de référence dans une transmission de liaison montante à entrées multiples sorties multiples (mimo)
WO2011019960A2 (fr) * 2009-08-12 2011-02-17 Research In Motion Limited Conception de signal de référence de démodulation pour canal partagé de liaison montante physique pour une transmission coordonnée en liaison montante dans un relais de type ii utilisant un signal de référence de démodulation discontinu
US20130034070A1 (en) * 2010-04-22 2013-02-07 Lg Electronics Inc. Method and apparatus for channel estimation for radio link between a base station and a relay station
US20120008556A1 (en) * 2010-07-09 2012-01-12 Minseok Noh Method and apparatus for transmitting uplink reference signal in a multi-antenna wireless communication system

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ERICSSON ET AL: "Reference signals for enhanced control channels", 3GPP DRAFT; R1-113678, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. San Francisco; 20111114 - 20111118, 8 November 2011 (2011-11-08), XP050561814 *
SAMSUNG: "ePHICH design for Rel-11", 3GPP DRAFT; R1-122258 EPHICH DESIGN FINAL, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Prague, Czech Republic; 20120521 - 20120525, 12 May 2012 (2012-05-12), XP050600521 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9622241B2 (en) 2014-09-26 2017-04-11 Alcatel Lucent Method and apparatus for preventing message collision
TWI580291B (zh) * 2014-09-26 2017-04-21 阿爾卡特朗訊公司 用於避免訊息碰撞之方法及裝置

Similar Documents

Publication Publication Date Title
US9894651B2 (en) Methods and apparatus for resource allocation for D2D communications
US9923684B2 (en) Methods to support inter-eNodeB CoMP
AU2021204172B2 (en) Allocation of communication resources for control signals in the uplink
US9451606B2 (en) Method and device for feedback information transmission based on enhanced PHICH
EP3297194B1 (fr) Procédé de transmission et procédé de configuration pour canal de commande de liaison descendante, et terminal et station de base
KR101976148B1 (ko) 향상된 물리적 하이브리드 자동 재송 요구 표시자 채널을 위해 자원을 할당하기 위한 방법 및 장치
US10193681B2 (en) Method, apparatus and computer program for wireless communications
US20170135127A1 (en) User equipments, base stations and methods
US9113465B2 (en) Method and apparatus of resource allocation for machine type communication device, method and apparatus for receiving data for machine type communication
CN110612693B (zh) 用于在无线通信系统中传输下行链路控制信道的方法和装置
US9693344B2 (en) Allocation of communication resources
WO2013025050A2 (fr) Procédé et appareil permettant de décoder des données dans un système de communication sans fil
US20150110015A1 (en) Method and Device for Transmitting Downlink Control Information
WO2014005322A1 (fr) Espaces de recherche pour des communications sans fil
EP2635081B1 (fr) Attribution de ressources de communication
WO2014124667A1 (fr) Distribution de canaux de commande
WO2013023686A1 (fr) Programmation dans un système de communication apte à utiliser des sous-trames neutralisées ou pratiquement vierges
US20140301352A1 (en) Enhanced physical harq indicator channel structure

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: 13705958

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: 13705958

Country of ref document: EP

Kind code of ref document: A1