CN107437981A - Transmission method, network side equipment and the terminal device of enhanced Physical Downlink Control Channel - Google Patents
Transmission method, network side equipment and the terminal device of enhanced Physical Downlink Control Channel Download PDFInfo
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- CN107437981A CN107437981A CN201610355292.XA CN201610355292A CN107437981A CN 107437981 A CN107437981 A CN 107437981A CN 201610355292 A CN201610355292 A CN 201610355292A CN 107437981 A CN107437981 A CN 107437981A
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- epdcch
- terminal device
- network side
- side equipment
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- 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
- H04L5/0057—Physical resource allocation for CQI
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
Abstract
The invention discloses a kind of enhanced Physical Downlink Control Channel EPDCCH transmission method, network side equipment and terminal device, belong to communication technique field.This method includes：Issue initial EPDCCH configuration informations；The arrowband CQI information of receiving terminal apparatus real-time report；Whether the channel circumstance for judging terminal device according to the CQI information reaches default threshold value；When channel circumstance reaches threshold value, and initial transmission mode is distributed, EPDCCH transmission means is changed to by centralization according to dynamic EPDCCH mechanism；When channel circumstance is not up to threshold value, and initial transmission mode is centralized, EPDCCH transmission means is changed to by distribution according to dynamic EPDCCH mechanism.Thus, it is possible to EPDCCH transmission means is dynamically adjusted according to real-time channel status.
Description
Technical field
The present invention relates to communication technique field, more particularly to the transmission method of enhanced Physical Downlink Control Channel, network
Side apparatus and terminal device.
Background technology
3GPP (the 3rd in LTE-A (Long-Term Evolution-Advanced, senior long term evolution) system
Generation Partnership Project, third generation partner program) Release11 introduces EPDCCH
The concept of (Enhanced Physical Downlink Control Channel, enhanced Physical Downlink Control Channel).
EPDCCH is mainly used in increasing the capacity of control channel；It is beneficial to the cross-carrier scheduling characteristic of carrier aggregation；Support control information
It is scheduled on frequency domain and ICIC (Inter-Cell Interference Coordination, coordinating district interference) place
Reason.EPDCCH is sent out using PDSCH (Physical Downlink Shared Channel, Physical Downlink Shared Channel) resources
DCI (Downlink Control Information, Downlink Control Information) is sent, generally only takes up whole downlink system bandwidth
Sub-fraction.EPDCCH is instructed by EPDCCH-SetConfig-r11 by eNB (Ehance NodeB, enhanced base station) and configured
Give UE (User Equipment, user equipment).Wherein transmissionType-r11 instruction configurations EPDCCH transmission side
Formula is centralized (localized) or distribution (distributed).EPDCCH takes data industry in PDSCH transmissions
The transfer resource of business, it is this that the channel shape that actually UE reports is not accounted for by the EPDCCH transmission means of eNB fixed configurations
State.3GPP does not provide particularly flexible adaptive handover scheme, so as to which network and UE can not be allowed flexibly to be selected under different scenes
Select suitable EPDCCH sending methods and reception mode.
The content of the invention
In view of this, it is an object of the invention to provide a kind of enhanced Physical Downlink Control Channel EPDCCH transmission side
Method, network side equipment and terminal device, to solve the problems, such as flexibly select suitable EPDCCH transmission means.
To achieve the above object, the present invention provides a kind of EPDCCH transmission methods, and the method comprising the steps of：Issue initial
EPDCCH configuration informations, the initial EPDCCH configuration informations include initial EPDCCH transmission means, the initial transmission
Mode includes centralization or distributed；The narrow band channel quality indicator (CQI) information of receiving terminal apparatus real-time report；According to described
CQI information judges whether the channel circumstance of the terminal device reaches default threshold value；When the channel circumstance reaches threshold value, and
When the initial transmission mode is distributed, EPDCCH transmission means is changed to by centralization according to dynamic EPDCCH mechanism；And
, will according to dynamic EPDCCH mechanism when the channel circumstance is not up to threshold value, and the initial transmission mode is centralized
EPDCCH transmission means is changed to distribution.
Alternatively, this method also includes before described the step of issuing initial EPDCCH configuration informations：Checking needs
Whether the terminal device for carrying out cross-carrier scheduling supports the dynamic EPDCCH mechanism.
Alternatively, the step that EPDCCH transmission means is changed to centralization according to dynamic EPDCCH mechanism is specifically wrapped
Include：The terminal device is notified to carry out the message of EPDCCH transmissions using dynamic EPDCCH mechanism；According to the terminal device
The arrowband position reported determines a preferable frequency domain position of channel quality；And concentrated by one frequency domain position to described
Terminal device carries out EPDCCH transmissions.
Alternatively, it is described EPDCCH transmission means is changed to by distributed step according to dynamic EPDCCH mechanism specifically to wrap
Include：The terminal device is notified to carry out the message of EPDCCH transmissions using dynamic EPDCCH mechanism；According to the terminal device
The arrowband position reported determines the relatively good frequency domain position of multiple channel qualities；And by the multiple frequency domain position disperse to
The terminal device carries out EPDCCH transmissions.
Alternatively, this method also includes：When the channel circumstance reaches threshold value, and the initial transmission mode is concentrates
Formula, or when the channel circumstance is not up to threshold value, and the initial transmission mode is distributed, it is determined that continuing using initial
Transmission means carries out EPDCCH transmissions.
To achieve the above object, the present invention provides another EPDCCH transmission method, and the method comprising the steps of：With initial
The transmission means of configuration receives the EPDCCH information that network side equipment is sent, and the initial transmission mode includes centralization or distribution
Formula；To network side equipment real-time report narrow band channel quality indicator (CQI) information；Receive network side equipment transmission uses dynamic
EPDCCH mechanism carries out the notification message of EPDCCH transmissions；And receive what network side equipment was sent according to the notification message received
EPDCCH information.
Alternatively, this method receives the EPDCCH information of network side equipment transmission in the transmission means with initial configuration
The step of before also include：The EPDCCH ability informations of the terminal device, the EPDCCH are reported to the network side equipment
Whether ability information supports dynamic EPDCCH mechanism including the terminal device.
To achieve the above object, the present invention also proposes a kind of network side equipment, and the network side equipment includes：Dispensing unit,
For issuing initial enhanced Physical Downlink Control Channel EPDCCH configuration informations, in the initial EPDCCH configuration informations
Including initial EPDCCH transmission means, the initial transmission mode includes centralization or distributed；Receiving unit, for receiving end
The narrow band channel quality indicator (CQI) information of end equipment real-time report；Judging unit, described in being judged according to the CQI information
Whether the channel circumstance of terminal device reaches default threshold value and judges the initial transmission mode for distributed or centralization；
Determining unit, for reaching threshold value when the channel circumstance, and the initial transmission mode for it is distributed when, according to dynamic
EPDCCH mechanism determines EPDCCH transmission means being changed to centralization；The determining unit, it is additionally operable to work as the channel circumstance
Not up to threshold value, and the initial transmission mode for it is centralized when, determined according to dynamic EPDCCH mechanism by EPDCCH transmission sides
Formula is changed to distribution；And transmitting element, for sending EPDCCH letters to the terminal device using the transmission means after changing
Breath.
Alternatively, the network side equipment also includes：Inspection unit, need to carry out described in cross-carrier scheduling for checking
Whether terminal device supports the dynamic EPDCCH mechanism.
Alternatively, the determining unit is additionally operable to notify the terminal device dynamic EPDCCH mechanism will be used to carry out
The message that EPDCCH is sent, and the arrowband position reported according to the terminal device determines the preferable frequency domain position of a channel quality
Put；The transmitting element, which is additionally operable to concentrate to the terminal device by one frequency domain position, carries out EPDCCH transmissions.
Alternatively, the determining unit is additionally operable to notify the terminal device dynamic EPDCCH mechanism will be used to carry out
The message that EPDCCH is sent, and the arrowband position reported according to the terminal device determines the relatively good frequency of multiple channel qualities
Domain position；The transmitting element is additionally operable to disperse to carry out EPDCCH hairs to the terminal device by the multiple frequency domain position
Send.
Alternatively, the determining unit is additionally operable to when the channel circumstance reaches threshold value, and the initial transmission mode is
Centralization, or when the channel circumstance is not up to threshold value, and the initial transmission mode is distributed, it is determined that continuing to use
Initial transmission mode carries out EPDCCH transmissions.
To achieve the above object, the present invention also proposes a kind of terminal device, and the terminal device includes：Receiving unit, it is used for
The enhanced Physical Downlink Control Channel EPDCCH information of network side equipment transmission is received with the transmission means of initial configuration, it is described
Initial transmission mode includes centralization or distributed；Reporting unit, for network side equipment real-time report narrow band channel quality
Indicate CQI information；And the receiving unit, it is additionally operable to receive the use dynamic EPDCCH mechanism progress that network side equipment is sent
The notification message that EPDCCH is sent, and the EPDCCH information sent according to the notification message reception network side equipment received.
Alternatively, the reporting unit is additionally operable to report the EPDCCH abilities of the terminal device to the network side equipment
Whether information, the EPDCCH ability informations support dynamic EPDCCH mechanism including the terminal device.
EPDCCH transmission methods, network side equipment and terminal device proposed by the present invention, can be reported according to terminal device
CQI information and the transmission means of initial configuration judge whether to need to change EPDCCH transmission means, and set according to terminal
The standby arrowband position reported determines that the preferable frequency domain position of channel quality carries out EPDCCH transmission, so as to according to real-time channel shape
State dynamically adjusts EPDCCH transmission means.So can when channel circumstance is preferable concentration of transmissions, be easy to frequency domain dispatching to increase
Benefit and demodulation of the terminal device to EPDCCH, the distributed transmission when channel circumstance is poor, EPDCCH transmission rates are improved, so as to
To a practical and simple adaptive transmission EPDCCH scheme.
Brief description of the drawings
Fig. 1 is a kind of flow of the transmission method for enhanced Physical Downlink Control Channel that first embodiment of the invention proposes
Figure；
Fig. 2 is a kind of flow of the transmission method for enhanced Physical Downlink Control Channel that second embodiment of the invention proposes
Figure；
Fig. 3 is a kind of module diagram for network side equipment that third embodiment of the invention proposes；
Fig. 4 is a kind of module diagram for terminal device that fourth embodiment of the invention proposes.
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
In order that technical problems, technical solutions and advantages to be solved are clearer, clear, tie below
Drawings and examples are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
As shown in figure 1, first embodiment of the invention proposes a kind of EPDCCH transmission method, system is communicated applied to LTE-A
In the network side equipment of system, the LTE-A communication systems also include terminal device.The network side equipment can be eNB.The end
End equipment can be the UE such as mobile phone, smart phone, notebook computer, computer.This method comprises the following steps：
S100, inspection need the terminal device for carrying out cross-carrier scheduling whether support D-EPDCCH (Dynamic-EPDCCH,
Dynamic EPDCCH) mechanism.The D-EPDCCH mechanism refers to be dynamically adjusted according to the current channel circumstance of terminal device
EPDCCH transmission means.
Specifically, when terminal device needs cross-carrier scheduling, network side equipment needs to send EPDCCH information to the end
End equipment.Network side equipment inquires about EPDCCH ability informations to the terminal device, such as by being sent to terminal device
UECapabilityInquiry instructions are inquired about.In the present embodiment, the EPDCCH ability informations mainly include the terminal
Whether equipment supports D-EPDCCH mechanism.The terminal device reports the EPDCCH ability informations of oneself to network side equipment, such as
Reported in UEInformation message.One flag bit is set in the message, if flag bit, which is true, represents the terminal
Equipment supports D-EPDCCH mechanism, if flag bit, which is false, represents that the terminal device does not support D-EPDCCH mechanism.
In other embodiments, when terminal device need not carry out cross-carrier scheduling or not support D-EPDCCH mechanism,
The network side equipment carries out the transmission of EPDCCH information using 3GPP currently existing schemes.
S102, when terminal device supports D-EPDCCH mechanism, issue initial EPDCCH configuration informations.
Specifically, network side equipment issues initial EPDCCH by RRCConnectionReconfiguration message
Configuration information.Include but is not limited to initial EPDCCH transmission means in the initial EPDCCH configuration informations.The initial transmission
Mode can be centralization or distribution.One EPDCCH uses one or more continuous ECCE (Enhanced
Control Channel Element, enhanced control channel unit) it is transmitted, when ECCE is EPDCCH carrying DCI most
Small information resources unit.One ECCE is by multiple EREG (Enhanced Resource Element Group, enhanced resource
Unit group) composition.Under centralized EPDCCH transmission, all EREG that an ECCE is included are located at same PRB (Physical
Resource Block, Physical Resource Block) in pair (to).Under distributed EPDCCH transmission, EREG meetings that an ECCE is included
It is distributed on different PRB pair and transmits.
S104, arrowband CQI (Channel-quality Indicator, the channel quality of receiving terminal apparatus real-time report
Instruction) information.
Specifically, CQI index values (index), modulation system are included but is not limited in the CQI information
(modulation), code rate, efficiency etc..Each CQI index values correspond to different modulation values, code rate and efficiency.
S106, judge whether the channel circumstance of terminal device reaches and (be more than or equal to) default threshold according to the CQI information
Value.
Specifically, according in the agreements of 3GPP-LTE 36213 to each CQI index values and its represent implication definition,
CQI index values, which reach more than 10 modulation systems, can think 64QAM (Quadrature Amplitude Modulation, Xiang Zheng
Hand over Modulation and Amplitude Modulation), at this moment channel circumstance is preferable, can start D-EPDCCH mechanism.Therefore, in the present embodiment, the threshold is set
It is worth for 10.The CQI index values that network side equipment comparison terminal equipment reports and the threshold value.If the CQI index values reach the threshold value,
Then perform step S108.If the CQI index values are not up to the threshold value, step S118 is performed.
S108, judge whether initial transmission mode is distributed.If so, then perform step S110-S114.If it is not, then hold
Row step S116.
Specifically, network side equipment can inquire about the initial transmission mode according to the initial EPDCCH configuration informations.
In the present embodiment, when the CQI index values reach the threshold value, i.e., when present channel environment is preferable, the D-EPDCCH mechanism thinks
Need not continue to use distributed transmission, and EPDCCH information should be concentrated on to the relatively good frequency domain position hair of channel quality
Send, so that terminal device receives and demodulates.
S110, notice terminal device will use D-EPDCCH mechanism to carry out EPDCCH transmissions.
Specifically, in the present embodiment, it is consensus through network side equipment and terminal device, DCI can be passed through
Format1A notifies terminal device to carry out the message of EPDCCH transmissions using D-EPDCCH mechanism.The DCI format1A lattice
There is the EPDCCH of generation hair flag bit in formula, represent that the EPDCCH information that terminal device will receive will if flag bit is true
Sent using D-EPDCCH mechanism, the EPDCCH information that terminal device will be represented if flag bit is false to be received will continue
Sent using initial transmission mode.The DCI format1A that terminal device detection receives, you can whether know network side equipment
D-EPDCCH mechanism will be used to carry out EPDCCH transmissions, be prepared with carrying out to receive.
S112, the arrowband position reported according to terminal device determine a preferable frequency domain position of channel quality.
Specifically, the arrowband position can be reported in the CQI information reported to network side equipment, can also
Be network side equipment now to terminal device send one report requirement after, terminal device is reported again.Network side equipment root
The arrowband position reported according to terminal device determines the preferable frequency domain position of EPDCCH channel qualities, and EPDCCH information is placed on into the letter
Sent on the preferable frequency domain PRB pair of road quality.
S114, concentrated by the frequency domain position of determination to terminal device and carry out EPDCCH transmissions.
Specifically, after network side equipment determines a preferable frequency domain position of channel quality, EPDCCH information is concentrated and put
Sent on the preferable frequency domain PRB pair of the channel quality to terminal device.Such sending method is advantageous to frequency domain dispatching increasing
Benefit and demodulation of the terminal device to EPDCCH information.
S116, it is determined that continuing to carry out EPDCCH transmissions using initial transmission mode.
Specifically, in the present embodiment, when the CQI index values reach the threshold value, i.e., when present channel environment is preferable, if should
Initial transmission mode has been centralization, and the D-EPDCCH mechanism thinks that EPDCCH transmission means need not be changed, can be with
Continue to carry out EPDCCH transmissions to terminal device using the initial transmission mode.
S118, judge whether initial transmission mode is centralization.If so, then perform step S120-S124.If it is not, then hold
Row step S126.
Specifically, in the present embodiment, when the CQI index values are not up to the threshold value, i.e., when present channel environment is poor, institute
D-EPDCCH mechanism is stated to think continue to use localized transmission, and should be by EPDCCH information dispersions in channel quality phase
Preferable frequency domain position is sent, to improve transmission rate.
S120, notice terminal device will use D-EPDCCH mechanism to carry out EPDCCH transmissions.
Specifically, network side equipment notifies terminal device D-EPDCCH mechanism will be used to carry out by DCI format1A
The message that EPDCCH is sent.Terminal device knows that network side equipment will use D- by the DCI format1A received
EPDCCH mechanism carries out EPDCCH transmissions, is prepared with carrying out to receive.
S122, the arrowband position reported according to terminal device determine the relatively good frequency domain position of multiple channel qualities.
Specifically, the arrowband position can be reported in the CQI information reported to network side equipment, can also
Be network side equipment now to terminal device send one report requirement after, terminal device is reported again.Network side equipment root
The arrowband position reported according to terminal device determines multiple relatively good frequency domain positions of EPDCCH channel qualities, by EPDCCH information
Scattered be placed on the relatively good frequency domain PRB pair of these channel qualities sends.
S124, disperse to carry out EPDCCH transmissions to terminal device by multiple frequency domain positions of determination.
Specifically, after network side equipment determines the relatively good frequency domain position of multiple channel qualities, by EPDCCH information point
Dissipate and sent on the relatively good frequency domain PRB pair of these channel qualities to terminal device.Such sending method is advantageous to
Improve EPDCCH transmission rate.
S126, it is determined that continuing to carry out EPDCCH transmissions using the initial transmission mode.
Specifically, in the present embodiment, when the CQI index values are not up to the threshold value, i.e., when present channel environment is poor, if
The initial transmission mode has been distributed, and the D-EPDCCH mechanism thinks that EPDCCH transmission means need not be changed, can
In a manner of continuing to use the initial transmission EPDCCH transmissions are carried out to terminal device.
As shown in Fig. 2 second embodiment of the invention proposes a kind of transmission method of enhanced Physical Downlink Control Channel, should
In terminal device for LTE-A communication systems, the LTE-A communication systems also include network side equipment.The network side equipment
Can be eNB.The terminal device can be the UE such as mobile phone, smart phone, notebook computer, computer.This method bag
Include following steps：
S200, the terminal device in connected state report EPDCCH ability informations to network side equipment.
In the present embodiment, whether the EPDCCH ability informations mainly support D-EPDCCH machines including the terminal device
System.The D-EPDCCH mechanism refers to the transmission means that EPDCCH is dynamically adjusted according to the current channel circumstance of terminal device.
Specifically, when terminal device needs cross-carrier scheduling, network side equipment needs to send EPDCCH information to the end
End equipment.Network side equipment inquires about EPDCCH ability informations to the terminal device, such as by being sent to terminal device
UECapabilityInquiry instructions are inquired about.The terminal device reports the EPDCCH abilities of oneself to believe to network side equipment
Breath, such as reported in UEInformation message.One flag bit is set in the message, if flag bit is true tables
Show that the terminal device supports D-EPDCCH mechanism, if flag bit, which is false, represents that the terminal device does not support D-EPDCCH mechanism.
S202, the EPDCCH information of network side equipment transmission is received with the transmission means of initial configuration.
Specifically, network side equipment issues initial EPDCCH by RRCConnectionReconfiguration message
Configuration information.Include but is not limited to initial EPDCCH transmission means in the initial EPDCCH configuration informations.The initial transmission
Mode can be centralization or distribution.Under centralized EPDCCH transmission, all EREG that an ECCE is included are positioned at same
In individual PRB pair.Under distributed EPDCCH transmission, the EREG that an ECCE is included can be distributed in different PRB pair uploads
It is defeated.
S204, to network side equipment real-time report arrowband CQI information.
Specifically, CQI index values, modulation system, code rate, efficiency etc. are included but is not limited in the CQI information.Often
Individual CQI index values correspond to different modulation values, code rate and efficiency.Network side equipment judges that terminal is set according to the CQI information
Whether standby channel circumstance reaches default threshold value.According in 3GPP-LTE36213 agreements to each CQI index values and its generation
The definition of the implication of table, CQI index values, which reach more than 10 modulation systems, can think 64QAM, and at this moment channel circumstance is preferable, can be with
Start D-EPDCCH mechanism.Therefore, in the present embodiment, it is 10 to set the threshold value.
The CQI index values that network side equipment comparison terminal equipment reports and the threshold value.If the CQI index values reach the threshold
Value, then continue to judge whether initial transmission mode is distributed, if, it is determined that EPDCCH hairs are carried out using D-EPDCCH mechanism
Send, if not, it is determined that continue to carry out EPDCCH transmissions using initial transmission mode.If the CQI index values are not up to the threshold value,
Continue to judge whether initial transmission mode is centralization, if, it is determined that EPDCCH transmissions are carried out using D-EPDCCH mechanism, if
It is no, it is determined that to continue to carry out EPDCCH transmissions using initial transmission mode.
S206, receive the notification message that EPDCCH transmissions are carried out using D-EPDCCH mechanism that network side equipment is sent.
Specifically, when network side equipment determines to carry out EPDCCH transmissions using D-EPDCCH mechanism, DCI is passed through
Format1A notifies terminal device to carry out the message of EPDCCH transmissions using D-EPDCCH mechanism.The DCI format1A lattice
There is the EPDCCH of generation hair flag bit in formula, represent that the EPDCCH information that terminal device will receive will if flag bit is true
Sent using D-EPDCCH mechanism, the EPDCCH information that terminal device will be represented if flag bit is false to be received will continue
Sent using initial transmission mode.The DCI format1A that terminal device detection receives, you can whether know network side equipment
D-EPDCCH mechanism will be used to carry out EPDCCH transmissions, be prepared with carrying out to receive.
S208, the EPDCCH information of network side equipment transmission is received according to the notification message received.
Specifically, when the CQI index values in the CQI information reach the threshold value, and initial transmission mode is distributed, net
The arrowband position that network side apparatus reports according to terminal device determines a preferable frequency domain position of EPDCCH channel qualities, will
EPDCCH information is concentrated to be placed on the preferable frequency domain PRB pair of the channel quality and sent.Terminal device is from frequency domain PRB pair
On intensively receive network side equipment transmission EPDCCH information, be then demodulated.
When the CQI index values are not up to the threshold value, and initial transmission mode is centralized, network side equipment is according to terminal
The arrowband position that equipment reports determines multiple relatively good frequency domain positions of EPDCCH channel qualities, and EPDCCH information dispersions are put
Sent on the relatively good frequency domain PRB pair of these channel qualities.Terminal device from these frequency domains PRB pair dispersedly
The EPDCCH information that network side equipment is sent is received, is then demodulated.
Wherein, terminal device can report arrowband position in the CQI information reported to network side equipment, can also
Receive network side equipment transmission report requirement after reported again.
As shown in figure 3, third embodiment of the invention proposes a kind of network side equipment 300, the network side equipment 300 is contained in
In LTE-A communication systems, the LTE-A communication systems also include terminal device 400.The network side equipment 300 can be eNB.
The terminal device 400 can be the UE such as mobile phone, smart phone, notebook computer, computer.
The network side equipment 300 is used to send EPDCCH information to terminal device 400 when cross-carrier scheduling occurs.
In the present embodiment, network side equipment 300 include inspection unit 302, dispensing unit 304, receiving unit 306, judging unit 308,
Determining unit 310 and transmitting element 312.
The inspection unit 302, need whether the terminal device 400 for carrying out cross-carrier scheduling supports D- for checking
EPDCCH mechanism.The D-EPDCCH mechanism refers to the biography that EPDCCH is dynamically adjusted according to the current channel circumstance of terminal device
Defeated mode.
Specifically, inspection unit 302 inquires about EPDCCH ability informations to the terminal device 400, such as by being set to terminal
Standby 400 transmission UECapabilityInquiry instructions are inquired about.In the present embodiment, the EPDCCH ability informations are main
D-EPDCCH mechanism whether is supported including the terminal device 400.The terminal device 400 reports oneself to inspection unit 302
EPDCCH ability informations, such as reported in UEInformation message.One flag bit is set in the message, if mark
Will position is that true represents that the terminal device 400 supports D-EPDCCH mechanism, if flag bit, which is false, represents the terminal device 400
D-EPDCCH mechanism is not supported.
The dispensing unit 304, for when terminal device 400 supports D-EPDCCH mechanism, issuing initial EPDCCH
Configuration information.
Specifically, dispensing unit 304 is issued initial by RRCConnectionReconfiguration message
EPDCCH configuration informations.Include but is not limited to initial EPDCCH transmission means in the initial EPDCCH configuration informations.This is first
Beginning transmission means can be centralization or distribution.
The receiving unit 306, the arrowband CQI information for the real-time report of receiving terminal apparatus 400.
Specifically, CQI index values, modulation system, code rate, efficiency etc. are included but is not limited in the CQI information.Often
Individual CQI index values correspond to different modulation values, code rate and efficiency.
Whether the judging unit 308, the channel circumstance for judging terminal device according to the CQI information reach default
Threshold value.
Specifically, according in the agreements of 3GPP-LTE 36213 to each CQI index values and its represent implication definition,
CQI index values, which reach more than 10 modulation systems, can think 64QAM, and at this moment channel circumstance is preferable, can start D-EPDCCH machines
System.Therefore, in the present embodiment, it is 10 to set the threshold value.The CQI index values that the comparison terminal equipment 400 of judging unit 308 reports
With the threshold value.If the CQI index values reach the threshold value, step S108 is performed.If the CQI index values are not up to the threshold value,
Perform step S118.
The judging unit 308, it is additionally operable to when the channel circumstance of the terminal device 400 reaches threshold value, continues to judge just
Whether beginning transmission means is distributed.
Specifically, judging unit 308 can inquire about the initial transmission mode according to the initial EPDCCH configuration informations.
In the present embodiment, when the CQI index values reach the threshold value, i.e., when present channel environment is preferable, the D-EPDCCH mechanism thinks
Need not continue to use distributed transmission, and EPDCCH information should be concentrated on to the relatively good frequency domain position hair of channel quality
Send, so that terminal device 400 receives and demodulates.
The determining unit 310, for when the initial transmission mode is distributed, notice terminal device will to use D-
EPDCCH mechanism carries out EPDCCH transmissions.
Specifically, it is determined that unit 310 can notify terminal device 400 to use D-EPDCCH machines by DCI format1A
System carries out the message of EPDCCH transmissions.There is the EPDCCH of generation hair flag bit in the DCI format1A forms, if flag bit
The EPDCCH information that terminal device 400 will then be represented for true to be received will use D-EPDCCH mechanism to send, if flag bit is
The EPDCCH information that false then represents terminal device 400 and will received will continue to send using initial transmission mode.Terminal device
The DCI format1A that 400 detections receive, you can know whether network side equipment 300 will use D-EPDCCH mechanism to carry out
EPDCCH is sent, and is prepared with carrying out to receive.
The determining unit 310, the arrowband position for being additionally operable to be reported according to terminal device 400 determine a channel quality compared with
Good frequency domain position.
Specifically, it is determined that the arrowband position that unit 310 reports according to terminal device 400 determines that EPDCCH channel qualities are preferable
Frequency domain position, EPDCCH information is placed on the preferable frequency domain PRB pair of the channel quality and sent.
The transmitting element 312, EPDCCH hairs are carried out for being concentrated by the frequency domain position of determination to terminal device 400
Send.
Specifically, it is determined that after unit 310 determines a preferable frequency domain position of channel quality, transmitting element 312 will
EPDCCH information is concentrated to be placed on the preferable frequency domain PRB pair of the channel quality and sent to terminal device 400.Such transmission
Mode is advantageous to the demodulation of frequency domain dispatching gain and terminal device 400 to EPDCCH information.
The determining unit 310, it is additionally operable to when the channel circumstance of the terminal device 400 reaches threshold value, and the initial transmission
When mode is centralized, it is determined that continuing to carry out EPDCCH transmissions using initial transmission mode.
Specifically, in the present embodiment, when the CQI index values reach the threshold value, i.e., when present channel environment is preferable, if should
Initial transmission mode has been centralization, and the D-EPDCCH mechanism thinks that EPDCCH transmission means need not be changed, can be with
Continue to carry out EPDCCH transmissions to terminal device 400 using the initial transmission mode.
The judging unit 308, it is additionally operable to, when the channel circumstance of the terminal device 400 is not up to threshold value, continue to judge
Whether initial transmission mode is centralization.
Specifically, in the present embodiment, when the CQI index values are not up to the threshold value, i.e., when present channel environment is poor, institute
D-EPDCCH mechanism is stated to think continue to use localized transmission, and should be by EPDCCH information dispersions in channel quality phase
Preferable frequency domain position is sent, to improve transmission rate.
The determining unit 310, it is additionally operable to when the initial transmission mode is centralized, notice terminal device 400 will be adopted
EPDCCH transmissions are carried out with D-EPDCCH mechanism.
Specifically, it is determined that unit 310 notifies terminal device 400 to enter using D-EPDCCH mechanism by DCI format1A
The message that row EPDCCH is sent.Terminal device 400 knows that network side equipment 300 will be adopted by the DCI format1A received
EPDCCH transmissions are carried out with D-EPDCCH mechanism, are prepared with carrying out to receive.
The determining unit 310, the arrowband position for being additionally operable to be reported according to terminal device 400 determine multiple channel quality phases
To preferable frequency domain position.
Specifically, it is determined that the arrowband position that unit 310 reports according to terminal device 400 determines multiple EPDCCH channel qualities
Relatively good frequency domain position, EPDCCH information dispersions are placed on the relatively good frequency domain PRB pair of these channel qualities and sent out
Send.
The transmitting element 312, it is additionally operable to disperse to carry out to terminal device 400 by multiple frequency domain positions of determination
EPDCCH is sent.
Specifically, it is determined that after unit 310 determines the relatively good frequency domain position of multiple channel qualities, transmitting element 312 will
EPDCCH information dispersions are placed on the relatively good frequency domain PRB pair of these channel qualities and sent to terminal device 400.So
Sending method be advantageous to improve EPDCCH transmission rate.
The determining unit 310, it is additionally operable to when the channel circumstance of the terminal device 400 is not up to threshold value, and the initial biography
When defeated mode is distributed, it is determined that continuing to carry out EPDCCH transmissions using initial transmission mode.
Specifically, in the present embodiment, when the CQI index values are not up to the threshold value, i.e., when present channel environment is poor, if
The initial transmission mode has been distributed, and the D-EPDCCH mechanism thinks that EPDCCH transmission means need not be changed, can
In a manner of continuing to use the initial transmission EPDCCH transmissions are carried out to terminal device 400.
As shown in figure 4, fourth embodiment of the invention proposes a kind of terminal device 400, the terminal device 400 is contained in LTE-
In A communication systems, the LTE-A communication systems also include network side equipment 300.The terminal device 400 can be mobile phone,
The UE such as smart phone, notebook computer, computer.The network side equipment 300 can be eNB.
The terminal device 400 is used to receive the transmission EPDCCH information of network side equipment 300 when cross-carrier scheduling occurs.
In the present embodiment, terminal device 400 also wraps in addition to the units such as necessary input, output, sensing, storage, control, power supply
Include reporting unit 402 and receiving unit 404.
The reporting unit 402, for reporting the EPDCCH ability informations of the terminal device 400 to network side equipment 300.
In the present embodiment, whether the EPDCCH ability informations mainly support D-EPDCCH including the terminal device 400
Mechanism.The D-EPDCCH mechanism refers to the transmission that EPDCCH is dynamically adjusted according to the current channel circumstance of terminal device 400
Mode.
Specifically, when terminal device 400 needs cross-carrier scheduling, network side equipment 300 needs to send EPDCCH information
To the terminal device 400.Network side equipment 300 inquires about EPDCCH ability informations to the terminal device 400, such as by terminal
Equipment 400 sends UECapabilityInquiry instructions and inquired about.The reporting unit 402 of the terminal device 400 is to network side
Equipment 300 reports the EPDCCH ability informations of oneself, such as is reported in UEInformation message.Set in the message
A flag bit is put, if flag bit, which is true, represents that the terminal device 400 supports D-EPDCCH mechanism, if flag bit is false
Represent that the terminal device 400 does not support D-EPDCCH mechanism.
The receiving unit 404, for receiving the EPDCCH of the transmission of network side equipment 300 with the transmission means of initial configuration
Information.
Specifically, network side equipment 300 is issued initial by RRCConnectionReconfiguration message
EPDCCH configuration informations.Include but is not limited to initial EPDCCH transmission means in the initial EPDCCH configuration informations.This is first
Beginning transmission means can be centralization or distribution.
The reporting unit 402, it is additionally operable to the real-time report arrowband CQI information of network side equipment 300.
Specifically, CQI index values, modulation system, code rate, efficiency etc. are included but is not limited in the CQI information.Often
Individual CQI index values correspond to different modulation values, code rate and efficiency.Network side equipment 300 judges terminal according to the CQI information
Whether the channel circumstance of equipment 400 reaches default threshold value.According in the agreements of 3GPP-LTE 36213 to each CQI index values with
And its represent implication definition, CQI index values, which reach more than 10 modulation systems, can think 64QAM, at this moment channel circumstance compared with
It is good, D-EPDCCH mechanism can be started.Therefore, in the present embodiment, it is 10 to set the threshold value.
Network side equipment 300 compares CQI index values and threshold value that reporting unit 402 reports.If the CQI index values reach
The threshold value, then continue to judge whether initial transmission mode is distributed, if, it is determined that carried out using D-EPDCCH mechanism
EPDCCH is sent, if not, it is determined that continue to carry out EPDCCH transmissions using initial transmission mode.If the CQI index values are not up to
The threshold value, then continue to judge whether initial transmission mode is centralization, if, it is determined that carried out using D-EPDCCH mechanism
EPDCCH is sent, if not, it is determined that continue to carry out EPDCCH transmissions using initial transmission mode.
The receiving unit 404, it is additionally operable to receive carrying out using D-EPDCCH mechanism for the transmission of network side equipment 300
The notification message that EPDCCH is sent.
Specifically, when network side equipment 300 determines to carry out EPDCCH transmissions using D-EPDCCH mechanism, DCI is passed through
Format1A notifies terminal device 400 to carry out the message of EPDCCH transmissions using D-EPDCCH mechanism.The DCI
There is the EPDCCH of generation hair flag bit in format1A forms, represent that terminal device 400 will receive if flag bit is true
EPDCCH information will use D-EPDCCH mechanism send, if flag bit be false if represent what terminal device 400 will receive
EPDCCH information will continue to send using initial transmission mode.Receiving unit 404 detects the DCI format1A received, you can
Know whether network side equipment 300 will use D-EPDCCH mechanism to carry out EPDCCH transmissions, prepared with carrying out to receive.
The receiving unit 404, it is additionally operable to receive what network side equipment 300 was sent according to the notification message received
EPDCCH information.
Specifically, when the CQI index values in the CQI information reach the threshold value, and initial transmission mode is distributed, net
The arrowband position that network side apparatus 300 reports according to reporting unit 402 determines a preferable frequency domain position of EPDCCH channel qualities,
EPDCCH information is concentrated to be placed on the preferable frequency domain PRB pair of the channel quality and sent.Receiving unit 404 is from frequency domain PRB
The EPDCCH information of the transmission of network side equipment 300 is intensively received on pair, is then demodulated.
When the CQI index values are not up to the threshold value, and initial transmission mode is centralized, the basis of network side equipment 300
The arrowband position that reporting unit 402 reports determines multiple relatively good frequency domain positions of EPDCCH channel qualities, and EPDCCH is believed
Scattered be placed on the relatively good frequency domain PRB pair of these channel qualities of breath sends.Receiving unit 404 is from these frequency domains PRB
The EPDCCH information of the transmission of network side equipment 300 is dispersedly received on pair, is then demodulated.
Wherein, the reporting unit 402 of terminal device 400 can be in the CQI information reported to network side equipment 300
Report arrowband position, can also receive network side equipment 300 transmission report requirement after reported again.
It should be noted that herein, term " comprising ", "comprising" or its any other variant are intended to non-row
His property includes, so that process, method, article or device including a series of elements not only include those key elements, and
And also include the other element being not expressly set out, or also include for this process, method, article or device institute inherently
Key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that including this
Other identical element also be present in the process of key element, method, article or device.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can add the mode of required general hardware platform to realize by software, naturally it is also possible to realized by hardware, but a lot
In the case of the former be more preferably embodiment.Based on such understanding, technical scheme is substantially in other words to existing
The part that technology contributes can be embodied in the form of software product, and the computer software product is stored in a storage
In medium (such as ROM/RAM, magnetic disc, CD), including some instructions to cause a station terminal equipment (can be mobile phone, calculate
Machine, server, air conditioner, or network equipment etc.) perform method described in each embodiment of the present invention.
Above by reference to the preferred embodiments of the present invention have been illustrated, not thereby limit to the interest field of the present invention.On
State that sequence number of the embodiment of the present invention is for illustration only, do not represent the quality of embodiment.Patrolled in addition, though showing in flow charts
Order is collected, but in some cases, can be with the step shown or described by being performed different from order herein.
Those skilled in the art do not depart from the scope of the present invention and essence, can have a variety of flexible programs to realize the present invention,
It can be used for another embodiment for example as the feature of one embodiment and obtain another embodiment.All technologies with the present invention
The all any modification, equivalent and improvement made within design, all should be within the interest field of the present invention.
Claims (14)
1. a kind of enhanced Physical Downlink Control Channel EPDCCH transmission method, the network side equipment applied to communication system
In, the method comprising the steps of：
Initial EPDCCH configuration informations are issued, the initial EPDCCH configuration informations include initial EPDCCH transmission sides
Formula, the initial transmission mode include centralization or distributed；
The narrow band channel quality indicator (CQI) information of receiving terminal apparatus real-time report；
Whether the channel circumstance for judging the terminal device according to the CQI information reaches default threshold value；
, will according to dynamic EPDCCH mechanism when the channel circumstance reaches threshold value, and the initial transmission mode is distributed
EPDCCH transmission means is changed to centralization；And
When the channel circumstance is not up to threshold value, and the initial transmission mode is centralized, according to dynamic EPDCCH mechanism
EPDCCH transmission means is changed to distribution.
2. EPDCCH transmission methods according to claim 1, it is characterised in that this method it is described issue it is initial
Also include before the step of EPDCCH configuration informations：
Inspection needs whether the terminal device for carrying out cross-carrier scheduling supports the dynamic EPDCCH mechanism.
3. EPDCCH transmission methods according to claim 1, it is characterised in that described to be incited somebody to action according to dynamic EPDCCH mechanism
The step that EPDCCH transmission means is changed to centralization specifically includes：
The terminal device is notified to carry out the message of EPDCCH transmissions using dynamic EPDCCH mechanism；
The arrowband position reported according to the terminal device determines a preferable frequency domain position of channel quality；And
Concentrated by one frequency domain position to the terminal device and carry out EPDCCH transmissions.
4. EPDCCH transmission methods according to claim 1, it is characterised in that described to be incited somebody to action according to dynamic EPDCCH mechanism
EPDCCH transmission means is changed to distributed step and specifically included：
The terminal device is notified to carry out the message of EPDCCH transmissions using dynamic EPDCCH mechanism；
The arrowband position reported according to the terminal device determines the relatively good frequency domain position of multiple channel qualities；And
Disperse to carry out EPDCCH transmissions to the terminal device by the multiple frequency domain position.
5. EPDCCH transmission methods according to claim 1, it is characterised in that this method also includes：
When the channel circumstance reaches threshold value, and the initial transmission mode is centralization, or when the channel circumstance does not reach
To threshold value, and the initial transmission mode for it is distributed when, it is determined that continuing to carry out EPDCCH transmissions using initial transmission mode.
6. a kind of enhanced Physical Downlink Control Channel EPDCCH transmission method, applied in the terminal device of communication system,
The method comprising the steps of：
The EPDCCH information of network side equipment transmission is received with the transmission means of initial configuration, the initial transmission mode includes collection
Chinese style or distribution；
To network side equipment real-time report narrow band channel quality indicator (CQI) information；
Receive the notification message that EPDCCH transmissions are carried out using dynamic EPDCCH mechanism that network side equipment is sent；And
The EPDCCH information of network side equipment transmission is received according to the notification message received.
7. EPDCCH transmission methods according to claim 6, it is characterised in that this method is in the biography with initial configuration
Defeated mode also includes before receiving the step of EPDCCH information of network side equipment transmission：
The EPDCCH ability informations of the terminal device are reported to the network side equipment, the EPDCCH ability informations include institute
State whether terminal device supports dynamic EPDCCH mechanism.
8. a kind of network side equipment, it is characterised in that the network side equipment includes：
Dispensing unit, it is described initial for issuing initial enhanced Physical Downlink Control Channel EPDCCH configuration informations
EPDCCH configuration informations include initial EPDCCH transmission means, and the initial transmission mode includes centralization or distributed；
Receiving unit, the narrow band channel quality indicator (CQI) information for receiving terminal apparatus real-time report；
Judging unit, for judging whether the channel circumstance of the terminal device reaches default threshold value according to the CQI information
And judge the initial transmission mode for distributed or centralization；
Determining unit, for reaching threshold value when the channel circumstance, and the initial transmission mode for it is distributed when, according to dynamic
EPDCCH mechanism determines EPDCCH transmission means being changed to centralization；
The determining unit, it is additionally operable to when the channel circumstance is not up to threshold value, and the initial transmission mode is centralized,
Determined EPDCCH transmission means being changed to distribution according to dynamic EPDCCH mechanism；And
Transmitting element, for sending EPDCCH information to the terminal device using the transmission means after changing.
9. network side equipment according to claim 8, it is characterised in that the network side equipment also includes：
Inspection unit, need whether the terminal device for carrying out cross-carrier scheduling supports the dynamic EPDCCH machines for checking
System.
10. network side equipment according to claim 8, it is characterised in that：
The determining unit is additionally operable to notify the terminal device to carry out disappearing for EPDCCH transmissions using dynamic EPDCCH mechanism
Breath, and the arrowband position reported according to the terminal device determines a preferable frequency domain position of channel quality；
The transmitting element, which is additionally operable to concentrate to the terminal device by one frequency domain position, carries out EPDCCH transmissions.
11. network side equipment according to claim 8, it is characterised in that：
The determining unit is additionally operable to notify the terminal device to carry out disappearing for EPDCCH transmissions using dynamic EPDCCH mechanism
Breath, and the arrowband position reported according to the terminal device determines the relatively good frequency domain position of multiple channel qualities；
The transmitting element is additionally operable to disperse to carry out EPDCCH transmissions to the terminal device by the multiple frequency domain position.
12. network side equipment according to claim 8, it is characterised in that：
The determining unit is additionally operable to when the channel circumstance reaches threshold value, and the initial transmission mode is centralization, or
When the channel circumstance is not up to threshold value, and the initial transmission mode is distributed, it is determined that continuing to use initial transmission side
Formula carries out EPDCCH transmissions.
13. a kind of terminal device, it is characterised in that the terminal device includes：
Receiving unit, the enhanced physical down for receiving network side equipment transmission with the transmission means of initial configuration control letter
Road EPDCCH information, the initial transmission mode include centralization or distributed；
Reporting unit, for network side equipment real-time report narrow band channel quality indicator (CQI) information；And
The receiving unit, be additionally operable to reception network side equipment transmission carries out EPDCCH transmissions using dynamic EPDCCH mechanism
Notification message, and the EPDCCH information sent according to the notification message reception network side equipment received.
14. terminal device according to claim 13, it is characterised in that：
The reporting unit is additionally operable to report the EPDCCH ability informations of the terminal device to the network side equipment, described
Whether EPDCCH ability informations support dynamic EPDCCH mechanism including the terminal device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610355292.XA CN107437981B (en) | 2016-05-25 | 2016-05-25 | Transmission method of enhanced physical downlink control channel, network side equipment and terminal equipment |
| PCT/CN2016/089917 WO2017201835A1 (en) | 2016-05-25 | 2016-07-13 | Transmission method for enhanced physical downlink control channel, network apparatus, and terminal apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610355292.XA CN107437981B (en) | 2016-05-25 | 2016-05-25 | Transmission method of enhanced physical downlink control channel, network side equipment and terminal equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107437981A true CN107437981A (en) | 2017-12-05 |
| CN107437981B CN107437981B (en) | 2021-05-04 |
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| CN201610355292.XA Active CN107437981B (en) | 2016-05-25 | 2016-05-25 | Transmission method of enhanced physical downlink control channel, network side equipment and terminal equipment |
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| WO (1) | WO2017201835A1 (en) |
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| WO2017201835A1 (en) | 2017-11-30 |
| CN107437981B (en) | 2021-05-04 |
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