CN103202046B - User terminal, wireless base station and wireless communications method - Google Patents
User terminal, wireless base station and wireless communications method Download PDFInfo
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- CN103202046B CN103202046B CN201180053534.5A CN201180053534A CN103202046B CN 103202046 B CN103202046 B CN 103202046B CN 201180053534 A CN201180053534 A CN 201180053534A CN 103202046 B CN103202046 B CN 103202046B
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Abstract
In HetNet, user terminal is sent in high quality paging, and effectively sends CSI RS, thus carry out UL HARQ efficiently.This wireless communications method comprises: in being arranged in macrocell and form micro-base station of the Microcell little than this macrocell, user terminal sends the signal of the paging subframe of the Notification of Changes information having the CSI RS subframe comprising CSI RS and comprise the change representing system information and expression does not measure the step of control signal of CSI RS when described CSI RS subframe is consistent with the timing of described paging subframe；And in described user terminal, when CSI RS subframe is consistent with the timing of paging subframe, based on described control signal, determine the step of the CSI RS subframe of CSI RS to be measured.
Description
Technical field
The user terminal that the present invention relates to arrange in the wireless communication system of Microcell in macrocell, wireless base station and
Wireless communications method.
Background technology
Be make use of by standardization body 3GPP regulation and become UMTS(UMTS) the follow-up LTE of mode
The wireless communication system (hereinafter referred to as LTE system) of (Long Term Evolution) mode.Now, go back research and utilization in 3 gpp to become
The wireless communication system (hereinafter referred to as lte-a system) of the follow-up LTE-Advanced mode of LTE mode.
In lte-a system, study in the macrocell with the overlay area that radius is wide scope about a few km
Form the Microcell (such as, picocell, Femto cell etc.) of the overlay area with the local that radius is about tens meters
HetNet(heterogeneous network: Heterogeneous Network) (such as, non-patent literature 1).
Research is in this HetNet, for the purpose of improving the handling capacity that system is overall, carries out CRE(cell range extension:
Cell Range Expansion).In CRE, by the wireless base station (hereinafter referred to as micro-base station) coming self-forming Microcell
Reception power plus skew, thus extend the scope of Microcell.Therefore, the user terminal energy of the Microcell after extension it is positioned at
Enough wireless base stations from formation macrocell (following, macro base station) switch over to micro-base station.
Additionally, in this HetNet, the user terminal being switched to micro-base station by CRE can be done by bigger from macro base station
Disturb.Therefore, also research macro base station stops data transmission in a part of subframe, thus reduces this user terminal and be subject to from macro base station
The interference coordination of interference.
Fig. 1 is the figure of the example representing interference coordination.As it is shown in figure 1, carry out the subframe of data transmission (from a left side at macro base station
Play first and the 3rd subframe) in, the reception power from micro-base station in this user terminal is due to by from grand base
The interference stood and diminish.On the other hand, in macro base station, the subframe of data transmission is stopped (from from left to right second and the 4th son
Frame) in, the power that receives from micro-base station in this user terminal is not become big by from the interference of macro base station.It addition, stopping
In the subframe (stopping in subframe hereinafter referred to as sending) that only data send, can not exclusively stop sending data, but send right
Interference in this user terminal becomes a small amount of data in allowed band.Stop subframe as sending, such as, utilize MBSFN
(MBMS(multicast broadcast multimedia service: Multimedia Broadcast and Multicast Service) carrying single-frequency
Net) subframe, the nearly blank subframe of ABS(: Almost Blank Subframe).
When setting ABS, research considers the UL HARQ in macrocell/Microcell (picocell) as shown in Figure 3
Cycle 8 milliseconds of (up-link mixing ARQ) and set the ABS(of 8 millisecond periods in the radio frames of the macrocell of Fig. 3, hollow
Part is ABS).Now, in micro-base station (femto base station), macro base station sets transmission CSI-RS in 8 milliseconds of ABS
(channel condition information-reference signal).
So, if sending CSI-RS in 8 milliseconds, then the paging subframe causing the cycle to be 10 milliseconds (is led to by paging
Know the subframe of the change etc. of system) (subframe #0 in radio frames, at least one subframe in #4, #5, #9) and comprise CSI-RS
Subframe overlapping, if directly transmitted, both can conflict.It addition, in figure 3, may conflict in subframe #0, #4.
Page notification incoming call and the change etc. of system, it is desirable to higher quality.It is therefore proposed that at paging subframe and CSI-RS
Subframe likely can be overlapping all subframes (subframe #0, #4, #5, #9) in femto base station do not send CSI-RS.
Prior art literature
Non-patent literature
Non-patent literature 1:3GPP, TS36.300
Non-patent literature 2:3GPP, TSG-RAN WG1Meeting#62bis " Remaining aspects of CSI-RS
parameters and signaling”
Summary of the invention
The problem that invention is to be solved
But, paging sends the most all the time in subframe #0, #4, #5, #9, the most also can be only at subframe #0, #4, #5, #9
A part of subframe in send.Thus, only subframe #0, #4, #5, #9 a part of subframe in send paging time, in subframe #
0, #4, #5, #9 do not send CSI-RS cause can not effectively sending CSI-RS, it is impossible to carry out UL HARQ efficiently.
The present invention completes in view of this point, its object is to offer and sends user terminal in high quality in HetNet
Paging, and effectively send CSI-RS such that it is able to carry out the user terminal of UL HARQ, wireless base station and wireless efficiently
Communication means.
For solving the means of problem
The user terminal of the present invention is in being arranged in the macrocell formed by macro base station and is formed less than this macrocell micro-
Micro-base station of community, receive have comprise CSI-RS(channel condition information-reference signal) CSI-RS subframe and comprise table
Show the signal of the paging subframe of the Notification of Changes information of the change of system information, it is characterised in that described user terminal has: connect
Receipts portion, receives described signal；And subframe determination section, when described CSI-RS subframe is consistent with the timing of described paging subframe,
Notification of Changes information based on described signal, determines the CSI-RS subframe of CSI-RS to be measured.
Additionally, the user terminal of the present invention and is formed less than this macrocell in being arranged in the macrocell formed by macro base station
Micro-base station of Microcell, receive to have comprise CSI-RS(channel condition information-reference signal) CSI-RS subframe and bag
The signal of the paging subframe of the Notification of Changes information containing the change representing system information and control signal, it is characterised in that described
User terminal has: acceptance division, receives described signal and described control signal；And subframe determination section, at described CSI-RS
When subframe is consistent with the timing of described paging subframe, based on described control signal, determine not measure the CSI-RS subframe of CSI-RS.
The wireless base station of the present invention, is arranged in the macrocell formed by macro base station, and is formed less than this macrocell micro-
Community, and to user terminal send have comprise CSI-RS(channel condition information-reference signal) CSI-RS subframe and bag
The signal of the paging subframe of the Notification of Changes information containing the change representing system information, it is characterised in that described wireless base station has
Have: broadcast message generating unit, generate the broadcast message relevant with the CSI-RS subframe measuring CSI-RS；And sending part, by institute
State broadcast message and described signal is sent to described user terminal.
The wireless communications method of the present invention, it is characterised in that comprise: in being arranged in the macrocell formed by macro base station and
Form micro-base station of the Microcell less than this macrocell, user terminal transmission is had and comprises CSI-RS(channel condition information-ginseng
Examine signal) CSI-RS subframe and the signal of paging subframe of the Notification of Changes information that comprises the change representing system information
Step；And in described user terminal, when described CSI-RS subframe is consistent with the timing of described paging subframe, based on described
The Notification of Changes information of signal, determines the step of the CSI-RS subframe of CSI-RS to be measured.
Additionally, the wireless communications method of the present invention, it is characterised in that have: from be arranged in by macro base station formed grand little
In district and form micro-base station of the Microcell little than this macrocell, user terminal transmission is had and comprises CSI-RS(channel status
Information-reference signal) CSI-RS subframe and comprise the paging subframe of Notification of Changes information of the change representing system information
Signal and represent do not measure when described CSI-RS subframe is consistent with the timing of described paging subframe CSI-RS control letter
Number step；And in described user terminal, when CSI-RS subframe is consistent with the timing of paging subframe, based on described control
Signal, determines the step of the CSI-RS subframe of CSI-RS to be measured.
Invention effect
According to the present invention, in HetNet, according to the subframe of transmission paging, the most only avoid sending the subframe of paging and sending
CSI-RS, therefore sends paging in high quality, effectively sends CSI-RS such that it is able to carry out UL efficiently user terminal
HARQ。
Accompanying drawing explanation
Fig. 1 is the figure of the example representing interference coordination.
Fig. 2 is the summary construction diagram of the wireless communication system of the Notification Method of the application present invention.
Fig. 3 is the figure of the example representing abs mode.
Fig. 4 is the figure of the wireless communications method that embodiments of the present invention 1 are described.
Fig. 5 is the figure of the wireless communications method that embodiments of the present invention 1 are described.
Fig. 6 is the figure of the wireless communications method that embodiments of the present invention 2 are described.
Fig. 7 is the figure of the wireless communications method that embodiments of the present invention 2 are described.
Fig. 8 is the functional structure chart of the femto base station of embodiments of the present invention 1.
Fig. 9 is the functional structure chart of the user terminal of embodiments of the present invention 1.
Figure 10 is the functional structure chart of the femto base station of embodiments of the present invention 2.
Figure 11 is the functional structure chart of the user terminal of embodiments of the present invention 2.
Detailed description of the invention
Hereinafter, illustrate to utilize as Microcell the example of picocell, but be not limited to this, such as, can also be logical
Cross Femto cell and the community etc. of via node formation.Additionally, explanation utilizes the example of ABS as non-sent subframe, but
It is not limited to this, such as, can also be MBSFN sub-frame etc..
Fig. 2 is the summary construction diagram of the wireless communication system of the present invention.As in figure 2 it is shown, the wireless communication system of the present invention
Comprise formed macrocell MC the grand evolved base station of wireless base station (hereinafter referred to as macro base station) MeNB(: Macro evolved
NodeB) and formed picocell PC the slight evolved base station of wireless base station (hereinafter referred to as femto base station) PeNB(:
Pico evolved NodeB) and user terminal UE(user's set: User Equipment).
As in figure 2 it is shown, macro base station MeNB and femto base station PeNB connects via wired X2 interface.Additionally, macro base station
MeNB and femto base station PeNB is connected respectively on core network (not shown).Additionally, macro base station MeNB and femto base station PeNB
Share at least some of radio band.
In the wireless communication system shown in Fig. 2, user terminal UE is when being positioned at picocell PC, due to from slightly
The reception power reception than macro base station MeNB of base station PeNB is more powerful, is connected thus to femto base station PeNB.On the other hand,
User terminal UE is when being positioned at picocell PC and being outer, owing to the reception power of macro base station MeNB is than connecing from femto base station PeNB
Receive more powerful, be connected thus to macro base station MeNB.
Additionally, in the wireless communication system shown in Fig. 2, carry out CRE(cell range extension).In CRE, user terminal
UE to the reception power from femto base station PeNB plus skew, even therefore picocell PC outer but after being positioned at extension
Picocell PC ' in the case of, grand from reception power (adding the reception power of the skew) ratio of femto base station PeNB
The reception of base station MeNB is more powerful.Thus, even user terminal UE is outside picocell PC but after being positioned at extension
In the case of in picocell PC ', it is possible to be connected to femto base station PeNB, additionally it is possible to be switched to femto base station from macro base station MeNB
PeNB.Hereinafter, the user terminal UE being connected to femto base station PeNB is referred to as slight terminal UE, will be connected to macro base station MeNB's
User terminal UE is referred to as grand terminal UE, but its structure is identical.
In the wireless communication system of HetNet as described above, it is contemplated that the cycle paging of 10 milliseconds as described above
The CSI-RS subframe in frame and cycle 8 milliseconds can be overlapping, if directly transmitted, both can conflict.Now, paging is at subframe #0, #
4, in #5, #9 send, but the most all the time in subframe #0, #4, #5, #9 send, the most only subframe #0, one of #4, #5, #9
Molecule frame sends.Now, represent that the information sending paging in which subframe comprises in a broadcast signal.Thus, only existing
Subframe #0, #4, #5, #9 a part of subframe in send paging time, subframe #0, #4, #5, #9 do not send CSI-RS and cause not
Can effectively send CSI-RS, it is impossible to carry out UL HARQ efficiently.
The present inventors pays close attention to this point, finds that following situation completes the present invention: by only avoiding transmission paging
Subframe and send CSI-RS, thus in high quality user terminal is sent paging, and effectively sends CSI-RS, it is possible to efficiently
Ground carries out UL HARQ.
In the 1st mode of the present invention, which user terminal UE to seek according to the system information comprised in paging, decision at
Exhale mensuration CSI-RS in subframe.
By broadcast channel signal (system information), user terminal UE learns paging can send in which subframe.Thus,
User terminal UE can send paging in which subframe according to broadcast channel signal identification, thus (comprises in certain CSI-RS subframe
The subframe of CSI-RS) and the timing overlap of paging subframe (comprising the subframe of paging) in the case of, decision to be surveyed in which subframe
Determine CSI-RS.Such as, in overlapping subframe, CSI-RS is not measured.Now, usual femto base station does not sends
CSI-RS。
That is, in the 1st mode of the present invention, user terminal is sent by femto base station has CSI-RS comprising CSI-RS
Frame and comprise the signal of paging subframe of Notification of Changes information of the change representing system information, in the user terminal,
In the case of CSI-RS subframe is consistent with the timing of paging subframe, determine CSI-RS's to be measured based on Notification of Changes information
CSI-RS subframe.
In the 1st mode of the present invention, in the case of stopping the paging having carried out in the subframe of paging, at user terminal
In based on representing the Notification of Changes information of paging of not carrying out in specific paging subframe, be determined as specific paging subframe wanting
Measure the CSI-RS subframe of CSI-RS.
The method becomes step as shown in Figure 4 specifically.In this, it is assumed that carry out paging in subframe #4, #9, and should
Subframe likely can be overlapping with CSI-RS subframe.Firstly, since carry out paging, therefore user terminal UE in subframe #4, #9
Do not measure CSI-RS(Fig. 4 A).Now, identified by broadcast channel signal in subframe #4, #9, carry out the situation of paging.
If stopping at the paging in subframe #4 at femto base station side (network side), and user terminal UE receives this meaning of expression
The Notification of Changes thought, then user terminal UE determines that to measure CSI-RS(in subframe #4 is determined as subframe #4 measuring CSI-RS
CSI-RS subframe) (Fig. 4 B).
Hereafter, if starting to send CSI-RS in subframe #4 at femto base station side (network side), then user terminal UE exists
Subframe #4 measures CSI-RS(Fig. 4 C).
In the 1st mode of the present invention, in the case of starting paging in the subframe not carrying out paging, in the user terminal
Based on representing the Notification of Changes information carrying out paging in specific paging subframe, determine not to be set to specific paging subframe survey
Determine the CSI-RS subframe of CSI-RS.
The method becomes the step shown in Fig. 5 specifically.Here, suppose that carry out paging in subframe #4, #9, and this son
Frame likely can be overlapping with CSI-RS subframe.Firstly, since do not carry out paging in subframe #4, therefore user terminal UE measures
CSI-RS(Fig. 5 A).Now, owing to carrying out paging in subframe #9, CSI-RS is not the most measured.Come by broadcast channel signal
Identify in subframe #9, carry out the situation of paging.
The transmission of the CSI-RS of subframe #4 is stopped at femto base station side (network side).Now, user terminal UE measures subframe #
CSI-RS(Fig. 5 B of 4).
Then, if the paging started at femto base station side (network side) in subframe #4, and user terminal UE receives expression
The Notification of Changes of this meaning, then user terminal UE determines that not measuring CSI-RS(in subframe #4, #9 is determined as subframe #4, #9
Do not measure the CSI-RS subframe of CSI-RS) (Fig. 5 C).
In the 2nd mode of the present invention, femto base station side (network side) determines to measure CSI-in which paging subframe
RS and notify to user terminal.That is, in subframe #0, #4, #5, #9, the subframe of paging is carried out owing to femto base station is capable of identify that,
Therefore the situation that will avoid carrying out the subframe of this paging notifies to user terminal as broadcast message.
That is, in the 2nd mode of the present invention, user terminal is sent by femto base station has CSI-RS comprising CSI-RS
Frame and comprise represent system information change Notification of Changes information paging subframe signal and represent CSI-RS
Frame does not measure the control signal of CSI-RS time consistent with the timing of paging subframe, in the timing one of CSI-RS subframe and paging subframe
During cause, determine the CSI-RS subframe of CSI-RS to be measured in the user terminal based on control signal.
In the 2nd mode of the present invention, in the case of stopping the paging having carried out in the subframe of paging, at user terminal
In, by representing the control signal that can also measure CSI-RS in specific paging subframe, thus by specific paging subframe
It is determined as measuring the CSI-RS subframe of CSI-RS.Here, the situation that explanation control signal is broadcast channel signal (broadcast message).
The method becomes step as shown in Figure 6 specifically.In this, it is assumed that carry out paging in subframe #4, #9, and should
Subframe likely can be overlapping with CSI-RS subframe.Firstly, since carry out paging in subframe #4, #9, therefore user terminal UE is not
Measure CSI-RS(Fig. 6 A).Now, identified by broadcast channel signal in subframe #4, #9, carry out the situation of paging.
Stop at the paging in subframe #4 at femto base station side (network side), and user terminal UE receives this meaning of expression
Notification of Changes.Now, user terminal UE not yet measures CSI-RS(Fig. 6 B).
Hereafter, at femto base station side (network side), start to send CSI-RS in subframe #4.Now, user terminal UE is the most not
Measure CSI-RS(Fig. 6 C).Then, if receiving expression from femto base station side (network side) and can also measuring subframe #4
The broadcast message of CSI-RS, then after changing system information, user terminal UE measures CSI-RS(Fig. 6 D in subframe #4).
In the 2nd mode of the present invention, in the case of starting paging in the subframe not carrying out paging, at user terminal
In by represent can not measure in specific paging subframe CSI-RS broadcast message (represent do not seek in subframe #4
Exhale), determine the CSI-RS subframe that specific paging subframe not being set to measures CSI-RS.
The method becomes the step shown in Fig. 7 specifically.In this, it is assumed that carry out paging in subframe #4, #9, and this son
Frame likely can be overlapping with CSI-RS subframe.Firstly, since do not carry out paging in subframe #4, therefore user terminal UE measures
CSI-RS(Fig. 7 A).Now, owing to carrying out paging in subframe #9, CSI-RS is not the most measured.Come by broadcast channel signal
Identify in subframe #9, carry out the situation of paging.
Then, subframe #4, CSI-RS(is not measured in subframe #4 if accepting to represent from femto base station side (network side)
In carry out paging) broadcast message, then after changing system information, user terminal UE determine do not measure in subframe #4, #9
Subframe #4 is determined as not measuring the CSI-RS subframe of CSI-RS by CSI-RS() (Fig. 7 B).
Then, the transmission of the CSI-RS in subframe #4 is stopped at femto base station side (network side).Now, user terminal UE
CSI-RS(Fig. 7 C of accident stator frame #4, #9).
Hereafter, if in femto base station side (network side) beginning paging in subframe #4, and user terminal UE receives table
Show the Notification of Changes of this meaning, then user terminal UE is after changing system information, accepts paging in subframe #4, #9.This
Outward, CSI-RS(Fig. 7 D of user terminal UE accident stator frame #4, #9).
So, according to above-mentioned 1st mode and the 2nd mode, in HetNet, according to the subframe of transmission paging, the most only keep away
Exploitation send the subframe of paging to send CSI-RS, therefore, it is possible in high quality user terminal sent paging and effectively send
CSI-RS, thus carry out UL HARQ efficiently.
Below, the embodiment that present invention will be described in detail with reference to the accompanying.
(embodiment 1)
In the present embodiment, illustrate user terminal UE, according to the system information comprised in the paging, determines at which to seek
Exhale the situation (the 1st mode) measuring CSI-RS in subframe.
The schematic configuration of the wireless communication system of embodiments of the present invention 1 is identical with the structure shown in Fig. 2.Shown in Fig. 2
Each device (that is, macro base station MeNB, femto base station PeNB, slight terminal UE) have include antenna, communication interface, processor,
The hardware of memorizer, transmitter/receiver circuit etc., storage has the software module performed by processor in memory.After it addition,
The functional structure of each device stated can be realized by above-mentioned hardware, it is also possible to by the software module performed by processor
Realize, it is also possible to realized by a combination of both.
Fig. 8 is the functional structure chart of the femto base station of embodiments of the present invention 1.As shown in Figure 8, femto base station PeNB tool
Have X2 interface portion 201(acceptance division), system information Variation control portion 202, CSI-RS insert control portion 203, transmission and reception unit
204。
X2 interface portion 201 sends reception signal via X2 interface with macro base station MeNB.
According to communication conditions, system information Variation control portion 202 determines that the subframe of paging to be carried out (determines paging
Frame), when the subframe carrying out paging changes, generate the Notification of Changes information which subframe to carry out paging in.System information becomes
Notification of Changes information is exported transmission and reception unit 204 by more control portion 202.
CSI-RS inserts control portion 203 and generates CSI-RS, and determines which subframe CSI-RS to be inserted in (decision
CSI-RS subframe).CSI-RS inserts control portion 203 and CSI-RS exports transmission and reception unit 204.
Transmission and reception unit 204 sends with slight terminal (user terminal) UE and receives wireless signal.Specifically, reception is sent
After the transmission that portion 204 applies to specify to CSI-RS, Notification of Changes information and other data processes, conduct sends signal, and should
Send signal and be sent to slight terminal UE.
Fig. 9 is the functional structure chart of the slight terminal of embodiments of the present invention 1.As it is shown in figure 9, terminal UE slightly has
Transmission and reception unit 301(acceptance division), determination part 302, subframe determination section 303.
Transmission and reception unit 301 sends with femto base station PeNB and receives wireless signal.Specifically, transmission and reception unit 301 connects
Receive the signal sent from femto base station PeNB, receive the signal with following two signal specifically: have and comprise CSI-RS
The signal of subframe；And there is the signal of paging subframe.Additionally, transmission and reception unit 301 receives the change representing system information
The Notification of Changes information of (change etc. of paging subframe).
Determination part 302 utilizes the CSI-RS received in transmission and reception unit 301 to measure channel quality.Determination part 302 base
Determine that information (to measure the information of CSI-RS in which subframe or not measure in the subframe exported from subframe determination section 303
The information of the CSI-RS of which subframe), utilize CSI-RS to measure channel quality.
Subframe determination section 303 is based on the Notification of Changes information received in transmission and reception unit 301, decision CSI-to be measured
The subframe of RS or do not measure the subframe of CSI-RS, and by its information (subframe decision information) output to determination part 302.Subframe
Situation that determination section 303 determines to comprise in Notification of Changes information, for the subframe CSI-RS to be measured stopping paging (will be stopped
Only the subframe of paging is determined as the subframe of CSI-RS to be measured).Or, subframe determination section 303 determines in Notification of Changes information
The subframe starting paging (is determined as not measuring CSI-by the situation that subframe that comprise, for beginning paging does not measure CSI-RS
The subframe of RS).
In the wireless communication system with said structure, first, from femto base station PeNB, user terminal UE is sent tool
There is the paging subframe of the CSI-RS subframe that comprises CSI-RS and the Notification of Changes information that comprises the change representing system information
Signal.When CSI-RS subframe is consistent with the timing of paging subframe, based on Notification of Changes information in user terminal UE, determine to want
Measure the CSI-RS subframe of CSI-RS.
Such as, in the case of femto base station side (side, networking) stops at the paging in the subframe carrying out paging, it is being
System information Variation control portion 202 generates the Notification of Changes information representing this situation, and this Notification of Changes information is passed through paging
It is sent to user terminal UE.In the user terminal, based on the Notification of Changes information received, determine in subframe determination section 303
CSI-RS is measured in the subframe stopped paging.Then, measure in the subframe stopped paging in determination part 302
CSI-RS。
Additionally, in the case of the paging started at femto base station side (network side) in the subframe carrying out paging,
System information Variation control portion 202 generates the Notification of Changes information representing this meaning, and by this Notification of Changes information by seeking
Exhale and be sent to user terminal UE.In the user terminal, based on the Notification of Changes information received, in subframe determination section 303 certainly
It is scheduled on and has started the subframe of paging does not measure CSI-RS.Then, in determination part 302, in the subframe started paging not
Measure CSI-RS.
(embodiment 2)
Which in the present embodiment, illustrate to determine in paging subframe, to measure CSI-at femto base station side (network side)
Notify after RS to the situation of user terminal.
The schematic configuration of the wireless communication system of embodiments of the present invention 2 is identical with the structure shown in Fig. 2.Shown in Fig. 2
Each device (that is, macro base station MeNB, femto base station PeNB, slight terminal UE) have include antenna, communication interface, processor,
Memorizer, transmitter/receiver circuit etc. are at interior hardware, and storage has the software module performed by processor in memory.It addition,
The functional structure of each device described later can be realized by above-mentioned hardware, it is also possible to by the software mould performed by processor
Block realizes, it is also possible to realized by a combination of both.
Figure 10 is the functional structure chart of the femto base station of embodiments of the present invention 2.As shown in Figure 10, femto base station PeNB
There is X2 interface portion 201(acceptance division), system information Variation control portion 202, CSI-RS insert control portion 203, transmission and reception unit
204, control signal generating unit 205.
X2 interface portion 201 and macro base station MeNB send via X2 interface and receive signal.
System information Variation control portion 202, according to communication conditions, determines the subframe (determining paging subframe) of paging to be carried out,
In the case of the subframe carrying out paging changes, generate and represent the Notification of Changes information carrying out paging in which subframe.
Notification of Changes information is exported transmission and reception unit 204 by system information Variation control portion 202.
CSI-RS inserts control portion 203 and generates CSI-RS, and determines which subframe CSI-RS is inserted into (determines CSI-RS
Subframe).CSI-RS inserts control portion 203 and exports CSI-RS to transmission and reception unit 204.
Control signal generating unit 205 generates expression and does not measure CSI-when CSI-RS subframe is consistent with the timing of paging subframe
The control signal of RS, and control signal is exported transmission and reception unit 204.This control signal is to represent in specific paging subframe
In can also measure the control signal of CSI-RS or represent and can not measure the control of CSI-RS in specific paging subframe
Signal.It addition, this control signal is broadcast channel signal or private subscribers channel signal (signal of so-called layer 3).
Transmission and reception unit 204 sends with slight terminal (user terminal) UE and receives wireless signal.Specifically, reception is sent
After CSI-RS, Notification of Changes information, other data and the transmission of control signal enforcement regulation are processed by portion 204, conduct is sent out
The number of delivering letters, thus this transmission signal is sent to slight terminal UE.
Figure 11 is the functional structure chart of the slight terminal of embodiments of the present invention 2.As shown in figure 11, slight terminal UE tool
Have transmission and reception unit 301(acceptance division), determination part 302, subframe determination section 303.
Transmission and reception unit 301 sends with femto base station PeNB and receives wireless signal.Specifically, transmission and reception unit 301 connects
Receive the signal sent from femto base station PeNB, specifically, receive signal and the control signal with signal below: have
The signal of the subframe comprising CSI-RS and there is the signal of paging subframe.Additionally, transmission and reception unit 301 receives expression system
The Notification of Changes information of the change (change etc. of paging subframe) of information.
Determination part 302 utilizes the CSI-RS received in transmission and reception unit 301 to measure channel quality.Determination part 302 base
Determine that information (measures the information of CSI-RS in which subframe or which does not measure in the subframe exported from subframe determination section 303
The information of the CSI-RS of individual subframe), utilize CSI-RS to measure channel quality.
Subframe determination section 303 is based on the Notification of Changes information received in transmission and reception unit 301 and control signal, certainly
The subframe of CSI-RS to be measured or do not measure the subframe of CSI-RS, and its information (subframe decision information) is exported to surveying
Determine portion 302.Subframe determination section 303 determines to measure or do not measure the subframe of CSI-RS according to control signal.Such as, control is worked as
In the case of signal is the control signal representing and can also measuring CSI-RS in specific paging subframe, by this specific paging
Subframe is determined as measuring the subframe of CSI-RS.Additionally, when control signal is to represent not measure CSI-in specific paging subframe
In the case of the control signal of RS, this specific paging subframe is determined as not measuring the subframe of CSI-RS.
In the wireless communication system with said structure, first, from femto base station PeNB, user terminal UE is sent tool
CSI-RS subframe and the signal of paging subframe and control signal, described CSI-RS subframe is had to comprise CSI-RS, paging subframe
Comprise the Notification of Changes information of the change representing system information.When CSI-RS subframe is consistent with the timing of paging subframe, with
Based on control signal in the terminal UE of family, determine the CSI-RS subframe of CSI-RS to be measured.
Such as, when femto base station side (network side) stops the paging carrying out in the subframe of paging, become in system information
More control portion 202 generates the Notification of Changes information representing this meaning, and is sent to use by paging by this Notification of Changes information
Family terminal UE.Additionally, at femto base station side (network side), user terminal UE is sent to represent which subframe (to stopped paging in
Subframe) in can measure the control signal of CSI-RS.In the user terminal, based on the control signal received, determine in subframe
Determine portion 303 determines to measure CSI-RS in the subframe stopped paging.Then, in determination part 302, stopped paging
Subframe measures CSI-RS.
Additionally, when femto base station side (network side) starts the paging in the subframe carrying out paging, in system information
Variation control portion 202 generates the Notification of Changes information representing this meaning, and this Notification of Changes information is sent to by paging
User terminal UE.Then, at femto base station side (network side), user terminal UE is sent represents in which subframe (to have started to seek
The subframe exhaled) in do not measure the control signal of CSI-RS.In the user terminal, based on the control signal received, determine in subframe
Determine portion 303 determines not measure CSI-RS in the subframe started paging.Then, in determination part 302, starting paging
Subframe in do not measure CSI-RS.
Above-mentioned embodiment is utilized to be described in detail by the present invention, but to those skilled in the art, it is known that this
Invention is not limited to the embodiment illustrated in this manual.Such as, femto base station PeNB can be that formation millimicro is small
The femto base station (Home eNodeB) in district, trunk desk (via node).In the case of for trunk desk, trunk desk and macro base station
MeNB is connected by wireless link (back haul link).
The present invention can implement, without deviating from determined by the record of claims as amendment and change mode
Spirit of the invention and scope.Thus, the record of this specification, for the purpose of illustrating, does not has any restriction to the present invention
Property meaning.Such as, in above-mentioned embodiment 1,2, subframe numbers is to illustrate, and utilizes other subframe numbers to be also not intended to the present invention.
The application is based on Patent 2010-250874 filed in 9 days November in 2010.Its content is all incorporated herein.
Claims (9)
1. a user terminal, receives the CSI-RS (channel condition information-reference sent in the CSI-RS subframe of specified period
Signal) and the paging of transmission at least one paging subframe, it is characterised in that described user terminal has:
Acceptance division, receives the broadcast channel signal sending described paging in which subframe represented in described paging subframe；With
And
Subframe determination section, when described CSI-RS subframe is consistent with the timing of described paging subframe, believes based on described broadcast channel
Number, determine the CSI-RS subframe of CSI-RS to be measured.
2. user terminal as claimed in claim 1, it is characterised in that
The subframe not sending described paging in described paging subframe is determined as measuring the CSI-of CSI-RS by described subframe determination section
RS subframe.
3. user terminal as claimed in claim 1, it is characterised in that
Described subframe determination section determines not to be set to the subframe sending described paging in described paging subframe measure CSI-RS's
CSI-RS subframe.
4. the user terminal as described in any one of claims 1 to 3, it is characterised in that
Described paging comprises the Notification of Changes information of the change representing described broadcast channel signal.
5. the wireless communications method in user terminal, described user terminal receives to be sent out in the CSI-RS subframe of specified period
The CSI-RS (channel condition information-reference signal) sent and the paging sent at least one paging subframe, its feature exists
In, described wireless communications method comprises:
Receive the step of the broadcast channel signal sending described paging in which subframe represented in described paging subframe；And
When described CSI-RS subframe is consistent with the timing of described paging subframe, based on described broadcast channel signal, decision to be surveyed
Determine the step of the CSI-RS subframe of CSI-RS.
6. wireless communications method as claimed in claim 5, it is characterised in that
In the step of described decision, it is determined as the subframe not sending described paging in described paging subframe measuring CSI-RS's
CSI-RS subframe.
7. wireless communications method as claimed in claim 5, it is characterised in that
In the step of described decision, determine not to be set to the subframe sending described paging in described paging subframe measure CSI-RS
CSI-RS subframe.
8. the wireless communications method as described in any one of claim 5 to 7, it is characterised in that
Described paging comprises the Notification of Changes information of the change representing described broadcast channel signal.
9. a wireless communication system, user terminal receives the CSI-RS (channel sent in the CSI-RS subframe of specified period
Status information-reference signal) and the paging of transmission at least one paging subframe, it is characterised in that described radio communication
System has:
Receive parts, receive the broadcast channel signal sending described paging in which subframe represented in described paging subframe；
And
Subframe deciding part, when described CSI-RS subframe is consistent with the timing of described paging subframe, based on described broadcast channel
Signal, determines the CSI-RS subframe of CSI-RS to be measured.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010250874A JP5432110B2 (en) | 2010-11-09 | 2010-11-09 | User terminal, wireless communication method, and wireless communication system |
| JP2010-250874 | 2010-11-09 | ||
| PCT/JP2011/075659 WO2012063793A1 (en) | 2010-11-09 | 2011-11-08 | User terminal, wireless base station, and wireless communication method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103202046A CN103202046A (en) | 2013-07-10 |
| CN103202046B true CN103202046B (en) | 2016-12-14 |
Family
ID=
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101507311A (en) * | 2006-06-19 | 2009-08-12 | 株式会社Ntt都科摩 | Mobile communication system |
| WO2010032477A1 (en) * | 2008-09-22 | 2010-03-25 | パナソニック株式会社 | Wireless communication base station, wireless communication device, and wireless communication system |
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101507311A (en) * | 2006-06-19 | 2009-08-12 | 株式会社Ntt都科摩 | Mobile communication system |
| WO2010032477A1 (en) * | 2008-09-22 | 2010-03-25 | パナソニック株式会社 | Wireless communication base station, wireless communication device, and wireless communication system |
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