CN102474868B - Method and equipment for estimating downlink channel condition - Google Patents
Method and equipment for estimating downlink channel condition Download PDFInfo
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- CN102474868B CN102474868B CN200980159875.3A CN200980159875A CN102474868B CN 102474868 B CN102474868 B CN 102474868B CN 200980159875 A CN200980159875 A CN 200980159875A CN 102474868 B CN102474868 B CN 102474868B
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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
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
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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
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
Abstract
The present invention provides a technical solution in which a network equipment estimates the downlink channel condition of a user terminal on a resource block in a relay network. The user terminal transmits data of service node received power, node identification data and data of node reference signal received power. After receiving the above data transmitted by the user terminal, the network equipment obtains the transmission status information of at least one node on the resource block, then estimates the downlink channel condition of the user terminal on the resource block according to the data of service node received power, the node identification data, the data of node reference signal received power and the transmission status information. By this means, even if the transmission status of a node on different resource blocks is different, the estimation for the downlink channel condition on different resource blocks can be comparatively accurate.
Description
Technical field
The present invention relates to the method and apparatus for the channel condition of estimating down-ward link, relate in particular in junction network the method and apparatus for the channel condition of estimating down-ward link.
Background technology
In cellular communication system, the quality of the received signal of user depends on the channel quality between user and the community under it, comes from interference level and the noise level of other communities.In order to optimize power system capacity and the covering under given power, the variation of the signal quality that the transmitter of base station need to receive according to each user is done corresponding rate-matched, i.e. usually said link circuit self-adapting.
In existing cellular communication system, the main process of link circuit self-adapting is as follows.First, user terminal can be measured the channel condition of its down link, for example receive Signal to Interference plus Noise Ratio (SINR, Signal to Interference plus Noise Ratio) or the signal interference ratio (SIR, Signal to Interference Ratio) of signal.Then, the channel condition of the down link measuring is fed back to base station by user terminal.Base station is receiving after the channel condition that user terminal sends, and can select according to channel condition modulation system and the code rate of the down link of itself and user terminal communication.
At 3GPP (Third Generation Partnership Project) long evolving system (LTE, Long Term Evolution system) in, channel quality instruction (CQI, Channel Quality Indication) identify channel condition, and be used to indicate the data rate of support.User terminal has been measured after the Signal to Interference plus Noise Ratio of its signal receiving m subframe, considers the receiver identity of himself, and the channel condition being detected feeds back to base station eNodeB (evolved NodeB) with the form of CQI.Base station eNodeB feeds back the CQI of received user terminal as reference, determines modulation system and the code rate of the down link corresponding to this user terminal in m+k subframe.
Summary of the invention
In 3GPP LTE system, when changes in channel conditions is not while being very fast, base station eNodeB just can by user terminal at the channel condition of the measured down link of m subframe as a reference, be determined corresponding to this user terminal modulation system and the code rate at the down link of m+k subframe.
But the chain circuit self-adaptive method that can work in cellular communication system can not be obtained same effect in the cellular communication system of introducing repeater mode.Introducing in the cellular communication system of repeater mode, in Yi Ge community, there is the via node of multiple subordinates of a base station eNodeB and this base station eNodeB.In the time that they adopt orthogonal send mode, in a subframe, only have a node (base station eNodeB or via node) to send data, this just causes may having different nodes in different subframes and is carrying out data transmission.
In the cellular communication system of introducing repeater mode, base station eNodeB and via node all can produce and disturb the reception signal of user terminal.Due to the residing position of different nodes difference, the interference that different nodes produces a user terminal is also different.For a user terminal, system may be diverse m+k subframe in the node that sends state m subframe with system in the node that sends state.Therefore, user terminal may have larger gap at the suffered interference level of m+k subframe with this user terminal at the suffered interference level of m subframe.In this case, if still to be used as the reference at the send mode of m+k subframe m the measured CQI information of subframe, selected modulation system and coded system can not match with the channel condition of m+k subframe, therefore performance that not only can not optimization system, can reduce the performance of system on the contrary.
In sum, will be highly profitable if can do relatively accurate estimation to the channel condition on certain Resource Block (as subframe) in future in the cellular network of introducing relaying.
In order to solve above-mentioned considering, an embodiment according to a first aspect of the invention, provides a kind of method of estimating the downlink channel conditions of a user terminal on a Resource Block in a network equipment of junction network.The method comprising the steps of:
-receiving service node received power data, it is used to indicate the relevant information of the power of the reference signal that a service node under this user terminal that described user terminal receives launches;
-receiving node identification data, it is used to indicate the mark of at least one node relevant to described user terminal;
-receiving node Reference Signal Received Power data, it is used to indicate the relevant information of the power of the reference signal that described at least one node that described user terminal receives launches;
-transmission the condition information of at least one node on described Resource Block described in obtaining; And
-according to described service node received power data, described node identification data, described node Reference Signal Received Power data and described transmission condition information, estimate the channel condition of the down link of described user terminal on described Resource Block.
Because the network equipment can either obtain the transmission situation of each node on some Resource Block, can understand again the power information of the node relevant to user terminal (for example user terminal being produced to the node disturbing), as long as there is not larger variation in the position of user terminal, the channel condition that the network equipment just can the down link of estimating user terminal on a Resource Block.Even if there is variation in the position of user terminal, also can be periodically or the power information of the acyclic renewal node relevant to user terminal, thus make the still channel condition of the down link of estimating user terminal on a Resource Block accurately of the network equipment.Therefore, even if the transmission state difference of node on different Resource Block still can be estimated the channel condition of the down link on different resource piece more accurately.
According to second aspect present invention embodiment, a kind of method that feedback information is provided in a user terminal in junction network is provided, the method comprising the steps of:
-sending service node received power data, it is used to indicate the relevant information of the power of the reference signal that a service node under this user terminal that described user terminal receives launches;
The power of-the reference signal that sends according to received multiple nodes, determines that at least one node is the node relevant to this user terminal;
-sending node identification data, it is used to indicate the mark of described at least one node; And
-sending node Reference Signal Received Power data, it is used to indicate the relevant information of the power of the reference signal that described at least one node that described user terminal receives launches.
User terminal for example,, by sending relative node (it being produced to the node disturbing) mark and power information, can assisted network equipment completes the estimation of channel condition of the down link on certain Resource Block to it.In this way, even if the transmission state difference of node on different Resource Block still can be estimated the channel condition of the down link on different resource piece more accurately.
An embodiment according to a third aspect of the present invention, provide a kind of in junction network network equipment estimate the method for the downlink channel conditions of a user terminal on a Resource Block.The method comprising the steps of:
-described user terminal sends service node received power data, and it is used to indicate the relevant information of the power of the reference signal that a service node under this user terminal that described user terminal receives launches;
The power of the reference signal that-described user terminal sends according to received multiple nodes, determines that at least one node is the node relevant to this user terminal;
-described user terminal sends node identification data, and it is used to indicate the mark of described at least one node;
-described user terminal sends node Reference Signal Received Power data, and it is used to indicate the relevant information of the power of the reference signal that described at least one node that described user terminal receives launches;
-described the network equipment receives described service node received power data;
-described the network equipment receives described node identification data;
-described the network equipment receives described node Reference Signal Received Power data;
-described the network equipment obtains the transmission condition information of described at least one node on described Resource Block; And
-described the network equipment, according to described service node received power data, described node identification data, described node Reference Signal Received Power data and described transmission condition information, is estimated the channel condition of the down link of described user terminal on described Resource Block.
An embodiment according to a forth aspect of the invention, provide a kind of at junction network for estimating a network equipment of the downlink channel conditions of a user terminal on a Resource Block.This network equipment comprises:
A receiver, it is for receiving service node received power data, and these service node received power data are used to indicate the relevant information of the power of the reference signal that a service node under this user terminal that described user terminal receives launches
This receiver is also for receiving node identification data, and these node identification data are used to indicate the mark of at least one node relevant to described user terminal,
This receiver is also for receiving node Reference Signal Received Power data, and these node Reference Signal Received Power data are used to indicate the relevant information of the power of the reference signal that described at least one node that described user terminal receives launches;
A first device, it is for obtaining the transmission condition information of described at least one node on described Resource Block; And
One second device, it,, for according to described service node received power data, described node identification data, described node Reference Signal Received Power data and described transmission condition information, estimates the channel condition of the down link of described user terminal on described Resource Block.
An embodiment according to a fifth aspect of the invention, provide a kind of in junction network for a user terminal of feedback information is provided.This user terminal comprises:
A first device, it,, for the power of the reference signal that sends according to received multiple nodes, determines that at least one node is the node relevant to this user terminal; And
A transmitter, it is for sending node identification data, and these node identification data are used to indicate the mark of described at least one node;
Described transmitter is also for sending node Reference Signal Received Power data, and these node Reference Signal Received Power data are used to indicate the relevant information of the power of the reference signal that described at least one node that described user terminal receives launches;
Described transmitter is also for sending service node received power data, and these service node received power data are used to indicate the relevant information of the power of the reference signal that a service node under this user terminal that described user terminal receives launches.
Various aspects of the present invention are by the explanation of the specific embodiment by hereinafter and more clear.
Brief description of the drawings
By reading the detailed description that non-limiting example is done done with reference to the following drawings, above and further feature, object and advantage of the present invention will become more apparent:
Fig. 1 is the method flow diagram of estimating according to an embodiment of the invention the downlink channel conditions of a user terminal on a Resource Block in a network equipment of junction network;
Fig. 2 is the method flow diagram that feedback information is provided in a user terminal in junction network according to an embodiment of the invention;
Fig. 3 be according to an embodiment of the invention in junction network network equipment estimate the method flow diagram of the downlink channel conditions of a user terminal on a Resource Block;
Fig. 4 is the method flow diagram that network equipment in junction network is according to another embodiment of the invention estimated the downlink channel conditions of a user terminal on a Resource Block;
Fig. 5 is the schematic block diagram of the network equipment according to an embodiment of the invention; And
Fig. 6 is the schematic block diagram of user terminal according to an embodiment of the invention.
Accompanying drawing mark identical or similar in accompanying drawing represents identical or similar parts.
Embodiment
Fig. 1 is the method flow diagram of estimating according to an embodiment of the invention the downlink channel conditions of a user terminal on a Resource Block in a network equipment of junction network.
According to a first aspect of the invention, first provide a kind of method of estimating the downlink channel conditions of a user terminal on a Resource Block in a network equipment of junction network.
Junction network can be self-organizing network or multihop network, also can be for introducing the cellular communications networks of relaying.The network equipment can be base station (such as base station eNodeB) or relay station etc.User terminal can be a mobile device or a permanent plant.Resource Block can be determined by frequency, code word or time etc.Down link refers to that user terminal receives the link of the transmitted signal of base station or relay station.
As shown in Figure 1, first in step 110, the network equipment receives service node received power data, and it is used to indicate the relevant information of the power of the reference signal that a service node under this user terminal that user terminal receives launches.
Service node under user terminal is the node that directly carries out data transmit-receive between user terminal.Service node can be the nearest node of distance users terminal or and user terminal between the node etc. of loss minimum.
The relevant information of the power of the reference signal that the service node that user terminal receives is launched can be indicated in several ways.For example, a pre-defined form, shows the corresponding power grade of different capacity, if the power of 100 milliwatt to 150 milliwatts is corresponding to power grade 3 in form.The network equipment is by the power grade information of the service node that receives, just can know the power bracket corresponding to this power grade information, then in this power bracket, get a value (as median, maximum or minimum value) as the received power corresponding to service node.And for example, performance number is converted into decibel, then distributes several bits for representing performance number, such as 10 bits just can represent 1024 performance numbers.
When the service node under user terminal changes or when the power of the reference signal of the service node that user terminal is received changes, the network equipment can be received the relevant information of the power of the reference signal of new service node.
Secondly, in step 120, the network equipment receives node identification data, and it is used to indicate the mark of at least one node relevant to user terminal.
The mark that the network equipment can be directly receives at least one node from user terminal also can receive by the another one network equipment mark of at least one node.Node can be base station or relay station.
At least one node relevant to user terminal can be determined in several ways.For example, at least one node can be determined by user terminal, is relative at least one node such as it can be received all node determinations except service node in the node of reference signal by, user terminal.And for example, at least one node also can be determined by the network equipment, such as, the network equipment is according to the position of the node location in communication network and user terminal, in the node except service node the closer node of chosen distance user terminal as with user-dependent at least one node.
Again, in step 130, the network equipment receives node Reference Signal Received Power data, and it is used to indicate the relevant information of the power of the reference signal that at least one node that user terminal receives launches.
The channel measurement for down link and estimation that the reference signal of launching of a node is launched for this node, and the signal of Cell searching.For example, the exclusive reference signal in LTE system Zhong community (RS, Reference Signal).
The relevant information of the power of the reference signal that at least one node that user terminal receives is launched can be indicated in several ways.The mode of the relevant information of the power of the reference signal that concrete mode can be launched with the service node that above-mentioned indicating user terminal receives is identical, does not repeat them here.
Step 120 and step 130 can be carried out simultaneously, also can separately carry out.For example, the network equipment is received node identification data and node Reference Signal Received Power data simultaneously, is exactly the received power relevant information of the corresponding node of this node identification after a node identification.
And for example, the first receiving node identification data of the network equipment, comprising three node identifications, then receives node Reference Signal Received Power data, comprising the received power relevant information of three nodes, and it is identical with putting in order of three node identifications to put in order.In this case, in the time that the network equipment is not received new node identification data, received node Reference Signal Received Power data are all that the node identification data that receive for the last time with the network equipment are corresponding.
Step 110, step 120 and step 130 can be carried out simultaneously, also can separately carry out.For example, the received power relevant information of the reference signal of service node be placed on the reference signal of the node relevant to user terminal received power relevant information above or below.
Then,, in step 140, the network equipment obtains the transmission condition information of at least one node on this Resource Block.
The transmission condition information of node can show in several ways.For example, if node transmission situation on a Resource Block is for sending, the transmission situation of this node on this Resource Block is denoted as 1; If node transmission situation on a Resource Block is not for sending, the transmission situation of this node on this Resource Block is denoted as 0.
The network equipment can obtain the transmission condition information of at least one node on a Resource Block in several ways.For example, the transmission condition information of the multiple nodes that store junction network in the network equipment on multiple Resource Block in future, the network equipment obtains the transmission condition information of at least one node on a Resource Block from storage information.And for example, the transmission condition information of the multiple nodes that store junction network in a first network equipment in junction network on multiple Resource Block in future, a second network equipment can obtain the transmission condition information of at least one node on a Resource Block from the storage information of first network equipment.
Finally, in step 150, the network equipment is the transmission condition information on this Resource Block according to service node received power data, node identification data, node Reference Signal Received Power data and at least one node, the channel condition of the down link of estimating user terminal on this Resource Block.
User terminal is receiving when data, and channel condition is subject to the impact of many factors, for example interference of other communication links to this user terminal or send to the size of the loss between node and the user terminal of user terminal data.Channel condition can characterize in several ways, Signal to Interference plus Noise Ratio or the signal interference ratio etc. of the suffered interference of such as user terminal, signal that user terminal receives.
The network equipment can be taked the channel condition of the down link of various ways estimating user terminal on a Resource Block.For example, carry out the channel condition of the down link of estimating user terminal on a Resource Block by the Signal to Interference plus Noise Ratio calculating in formula 1, wherein, P
sthe power of the reference signal that the service node receiving for user terminal sends, at least one node relevant to user terminal is node 1 to node k, P
0to P
kfor the received power of the reference signal that sends to node k corresponding to the received node 1 of user terminal, in the time that a node sends data on this Resource Block, corresponding to a of this node
ibe 1, in the time that a node does not send data on this Resource Block, corresponding to a of this node
ibe that 0, n is thermal noise.
And for example, when do not consider in formula 1 thermal noise time, also can be by estimating user terminal the signal interference ratio of the reception reference signal of the down link on a Resource Block estimate channel condition.
In an embodiment of the method, also comprise step, the network equipment, according to the channel condition of estimating, is identified for the resource scheduling scheme of the downlink communication of user terminal on this Resource Block.
Resource scheduling scheme at least comprises in following scheduling of resource item: transport block size, modulation system or code rate.Resource scheduling scheme also can be included in the transmitted power of the data-signal that sends to user terminal in down link.
Taking LTE system as example, the network equipment is dry than selecting corresponding CQI instruction, to reach the object of scheduling of resource according to the noise of estimating.
Fig. 2 is the method flow diagram that feedback information is provided in a user terminal in junction network according to an embodiment of the invention.
According to second aspect present invention embodiment, provide a kind of method that feedback information is provided in a user terminal in junction network.
As shown in Figure 2, in step 210, user terminal sends service node received power data, and it is used to indicate the relevant information of the power of the reference signal that a service node under this user terminal that user terminal receives launches.
Before step 210, user terminal can detect the reference signal of multiple nodes in junction network, and select a node as the service node under this user terminal according to the result detecting, such as selecting node that the reference signal that receives of user is the strongest as service node.User terminal and selected service node carry out direct information interaction.
The mode of user terminal transmission service node received power data is corresponding with the mode described in above-mentioned steps 110, does not repeat them here.
Secondly,, in step 220, the power of the reference signal that user terminal sends according to received multiple nodes, determines that at least one node is the node relevant to this user terminal.
The power of the reference signal of the measured node of user terminal is the power recording on a Resource Block, and the size of this Resource Block can to do the size of the Resource Block in the embodiment that channel condition estimates identical or different from the above-mentioned network equipment.The method of the power of the reference signal of a node of user terminal measurement and multiple nodes can be identical with the method for reseptance of the reference signal power in the search of existing cellular communication system small area and community switching, do not repeat them here.
User terminal can be determined at least one node relevant to user terminal in several ways.For example, preset a power threshold, if the performance number of the node reference signal that user terminal receives exceedes this power threshold, user terminal is just a node at least one node relevant to user terminal by this node determination.
And for example, preset a power ratio threshold value, if the ratio of the reference signal power of the service node that the received power of the reference signal of the node that user terminal receives and this user terminal receive is greater than power ratio threshold value, user terminal is just a node at least one node relevant to user terminal by this node determination.
Then, in step 230, user terminal sends node identification data, and it is used to indicate the mark of described at least one node.
The mark of a node can obtain by several different methods.For example, in LTE system, cell identity (ID) can obtain community ID by detecting synchronizing channel,
The mode of user terminal sending node identification data can, with reference to the mode described in above-mentioned steps 120, not repeat them here.
Finally, in step 240, user terminal sends node Reference Signal Received Power data, and it is used to indicate the relevant information of the power of the reference signal that described at least one node that described user terminal receives launches.
The mode of user terminal sending node Reference Signal Received Power data can, with reference to the mode described in above-mentioned steps 130, not repeat them here.
An embodiment according to a third aspect of the present invention, provide a kind of in junction network network equipment estimate the method for the downlink channel conditions of a user terminal on a Resource Block.The method comprises the steps:
-user terminal sends service node received power data, and it is used to indicate the relevant information of the power of the reference signal that a service node under this user terminal that user terminal receives launches;
The power of the reference signal that-user terminal sends according to received multiple nodes, determines that at least one node is the node relevant to this user terminal;
-user terminal sends node identification data, and it is used to indicate the mark of at least one node;
-user terminal sends node Reference Signal Received Power data, and it is used to indicate the relevant information of the power of the reference signal that at least one node that user terminal receives launches;
-the network equipment receives service node received power data;
-network equipment receiving node identification data;
-network equipment receiving node Reference Signal Received Power data;
-the network equipment obtains the transmission condition information of described at least one node on Resource Block; And
-the network equipment is according to service node received power data, node identification data, node Reference Signal Received Power data and send condition information, the channel condition of the down link of estimating user terminal on Resource Block.
All can be applied to a third aspect of the present invention above-mentioned corresponding to the network equipment described in the embodiment of a first aspect of the present invention and second aspect and the operation of user terminal, in junction network, a network equipment is estimated in the method for the downlink channel conditions of a user terminal on a Resource Block.
Further describe the operation of the network equipment and user terminal below by Fig. 3 and Fig. 4.
Fig. 3 be according to an embodiment of the invention in junction network network equipment estimate the method flow diagram of the downlink channel conditions of a user terminal on a Resource Block.
As shown in Figure 3, the service node that network equipment base station eNodeB is user terminal.In suppose relay network, have 10 nodes.
First,, in step 301, user terminal attempts measuring the received power of the reference signal of multiple node N1 to N10 in relay system.
Secondly, in step 302, user terminal, by Cell searching, is found the Reference Signal Received Power maximum corresponding to node N3 (being base station eNodeB), therefore determines that base station eNodeB is service node.In step 303, the Reference Signal Received Power corresponding to base station eNodeB is sent to base station eNodeB by service node received power data.
Again, in step 303, in the 5th subframe, user terminal detects the reference signal of these 4 nodes of N1, N4, N6 and N8, and the received power of the reference signal corresponding to 4 nodes and the received power of the reference signal corresponding to base station eNodeB are divided by, find to be greater than predefined power ratio threshold value 0.1 corresponding to the received power ratio of node N4 and N6.Therefore user determines that node N4 and N6 are the node relevant to this user terminal.
Then,, in step 305, user terminal sends to base station eNodeB by the node identification of node N4 and N6 by node identification data.In step 306, user terminal sends to base station eNodeB by the Reference Signal Received Power corresponding to node N4 and N6 by node Reference Signal Received Power data.
Next, in step 307, base station eNodeB, by stores schedule information, determines that, in the 8th subframe, N4 sends data, and N6 does not send data.
Then, in step 308, the Signal to Interference plus Noise Ratio of base station eNodeB estimating user terminal in the 8th subframe, wherein signal is the Reference Signal Received Power corresponding to base station eNodeB, disturbs as the Reference Signal Received Power corresponding to node N4.
Then, in step 309, base station eNodeB is according to the Signal to Interference plus Noise Ratio of user terminal of the 8th subframe of estimating, determines modulation system that the resource scheduling scheme of user terminal in the 8th subframe is QPSK and 2/3 code rate.And in step 310, definite scheme is sent to user terminal in the mode of CQI instruction.
In step 311, user terminal is found the movement due to user terminal, and at least one relevant node has become N1 and N8.Then user terminal and base station eNodeB repeat similarly to operate with above-mentioned steps 305 to 310 again.
Fig. 4 is the method flow diagram that network equipment in junction network is according to another embodiment of the invention estimated the downlink channel conditions of a user terminal on a Resource Block.
As shown in Figure 4, the determined service node of user terminal is a subordinate via node, and this subordinate via node is subordinated to host node base station eNodeB.Step shown in the basic and Fig. 3 of step shown in Fig. 4 is basic identical, difference is in host node, to carry out to 409 corresponding to the step 407 of channel condition estimation and scheduling of resource, and subordinate via node is only responsible for relevant data to forward between user terminal and host node base station eNodeB.
Fig. 5 is the schematic block diagram of the network equipment 500 according to an embodiment of the invention.
An embodiment according to a forth aspect of the invention, provide a kind of at junction network for estimating a network equipment 500 of the downlink channel conditions of a user terminal on a Resource Block.
This managing network device 500 comprises 510, one first devices 520 of a receiver and one second device 530 as shown in Figure 5.
Receiver 510 is for receiving service node received power data.These service node received power data are used to indicate the relevant information of the power of the reference signal that a service node under this user terminal that user terminal receives launches.
Receiver 510 is also for receiving node identification data.These node identification data are used to indicate the mark of at least one node relevant to user terminal.
Receiver 510 is also for receiving node Reference Signal Received Power data.These node Reference Signal Received Power data are used to indicate the relevant information of the power of the reference signal that at least one node that described user terminal receives launches.
First device 520 is for obtaining the transmission condition information of at least one node on Resource Block.
The second device 530 is for according to service node received power data, node identification data, node Reference Signal Received Power data and send condition information, the channel condition of the down link of estimating user terminal on Resource Block.
In an embodiment of the network equipment 600, the network equipment 600 also comprises one the 3rd device (not shown), and it,, for according to the channel condition of estimating, is identified for the resource scheduling scheme of the downlink communication of user terminal on Resource Block.Resource scheduling scheme at least comprises in following scheduling of resource item: transport block size, modulation system or code rate.
Fig. 6 is the schematic block diagram of user terminal 600 according to an embodiment of the invention.
An embodiment according to a fifth aspect of the invention, provide a kind of in junction network for a user terminal 600 of feedback information is provided.
User terminal 600 comprises a first device 610 and a transmitter 620.
First device 610, for the power of the reference signal that sends according to received multiple nodes, determines that at least one node is the node relevant to this user terminal.
Transmitter 620 is for sending node identification data.These node identification data are used to indicate the mark of at least one node.
Transmitter 620 is also for sending node Reference Signal Received Power data.These node Reference Signal Received Power data are used to indicate the relevant information of the power of the reference signal that at least one node that user terminal receives launches.
Transmitter 620 is also for sending service node received power data.These service node received power data are used to indicate the relevant information of the power of the reference signal that a service node under this user terminal that user terminal receives launches.
User terminal can be determined at least one node relevant to user terminal in several ways.For example, preset a power threshold, if the performance number of the node reference signal that user terminal receives exceedes this power threshold, user terminal is just a node at least one node relevant to user terminal by this node determination.
And for example, preset a power ratio threshold value, if the ratio of the reference signal power of the service node that the received power of the reference signal of the node that user terminal receives and this user terminal receive is greater than power ratio threshold value, user terminal is just a node at least one node relevant to user terminal by this node determination.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned example embodiment, and in the situation that not deviating from spirit of the present invention or essential characteristic, can realize the present invention with other concrete form.Therefore, no matter from which point, all should regard embodiment as exemplary, and be nonrestrictive, scope of the present invention is limited by claims instead of above-mentioned explanation, is therefore intended to all changes that drop in the implication and the scope that are equal to important document of claim to include in the present invention.Any Reference numeral in claim should be considered as limiting related claim.In addition, obviously other unit or step do not got rid of in " comprising " word, and odd number is not got rid of plural number.Multiple unit of stating in system claim or device also can be realized by software or hardware by a unit or device.The first, the second word such as grade is used for representing title, and does not represent any specific order.
Claims (13)
1. a method of estimating the downlink channel conditions of a user terminal on a Resource Block in a network equipment of junction network, the method comprising the steps of:
A. receive service node received power data, it is used to indicate the relevant information of the power of the reference signal that a service node under this user terminal that described user terminal receives launches;
B. receive node identification data, it is used to indicate the mark of at least one node relevant to described user terminal;
C. receive node Reference Signal Received Power data, it is used to indicate the relevant information of the power of the reference signal that described at least one node that described user terminal receives launches;
D. according to described node identification data, obtain the transmission condition information of described at least one node on described Resource Block; And
E. according to service node received power data, described node identification data, described node Reference Signal Received Power data and described transmission condition information, estimate the channel condition of the down link of described user terminal on described Resource Block.
2. method according to claim 1, it is characterized in that, the ratio of the reference signal power of the each node in described at least one node that described user terminal receives and the reference signal power of the described service node that this user terminal receives, is greater than a predefined power ratio threshold value.
3. method according to claim 1, is characterized in that, also comprises step after described step e:
-according to the channel condition of described estimation, be identified for the resource scheduling scheme of the downlink communication of described user terminal on described Resource Block.
4. method according to claim 3, is characterized in that, described resource scheduling scheme at least comprises in following scheduling of resource item: transport block size, modulation system or code rate.
5. the method that feedback information is provided in a user terminal in junction network, the method comprising the steps of:
-sending service node received power data, it is used to indicate the relevant information of the power of the reference signal that a service node under this user terminal that described user terminal receives launches;
The power of-the reference signal that sends according to received multiple nodes, determines that at least one node is the node relevant to this user terminal;
-sending node identification data, it is used to indicate the mark of described at least one node, and described node identification data are for obtaining the transmission condition information of described at least one node on a Resource Block in network equipment side; And
-sending node Reference Signal Received Power data, it is used to indicate the relevant information of the power of the reference signal that described at least one node that described user terminal receives launches;
Wherein, described service node received power data, described node identification data, described node Reference Signal Received Power data and described transmission condition information are for estimating the channel condition of the down link of described user terminal on described Resource Block in described network equipment side.
6. method according to claim 5, it is characterized in that, the ratio of the reference signal power of the each node in described at least one node that described user terminal receives and the reference signal power of the described service node that this user terminal receives, is greater than a predefined power ratio threshold value.
7. a network equipment that is used for estimating the downlink channel conditions of a user terminal on a Resource Block at junction network, this network equipment comprises:
A receiver, it is for receiving service node received power data, and these service node received power data are used to indicate the relevant information of the power of the reference signal that a service node under this user terminal that described user terminal receives launches,
This receiver is also for receiving node identification data, and these node identification data are used to indicate the mark of at least one node relevant to described user terminal,
This receiver is also for receiving node Reference Signal Received Power data, and these node Reference Signal Received Power data are used to indicate the relevant information of the power of the reference signal that described at least one node that described user terminal receives launches;
A first device, it is for obtaining the transmission condition information of described at least one node on described Resource Block; And
One second device, it,, for according to described service node received power data, described node identification data, described node Reference Signal Received Power data and described transmission condition information, estimates the channel condition of the down link of described user terminal on described Resource Block.
8. the network equipment according to claim 7, it is characterized in that, the ratio of the reference signal power of the each node in described at least one node that described user terminal receives and the reference signal power of the described service node that this user terminal receives, is greater than a predefined power ratio threshold value.
9. the network equipment according to claim 7, is characterized in that, also comprises:
One the 3rd device, it,, for according to the channel condition of described estimation, is identified for the resource scheduling scheme of the downlink communication of described user terminal on described Resource Block.
10. the network equipment according to claim 9, is characterized in that, described resource scheduling scheme at least comprises in following scheduling of resource item: transport block size, modulation system or code rate.
11. 1 kinds in junction network for a user terminal of feedback information is provided, this user terminal comprises:
A first device, it,, for the power of the reference signal that sends according to received multiple nodes, determines that at least one node is the node relevant to this user terminal; And
A transmitter, it is for sending node identification data, these node identification data are used to indicate the mark of described at least one node, and described node identification data are for obtaining the transmission condition information of described at least one node on a Resource Block in network equipment side;
Described transmitter is also for sending node Reference Signal Received Power data, and these node Reference Signal Received Power data are used to indicate the relevant information of the power of the reference signal that described at least one node that described user terminal receives launches;
Described transmitter is also for sending service node received power data, and these service node received power data are used to indicate the relevant information of the power of the reference signal that a service node under this user terminal that described user terminal receives launches;
Wherein, described service node received power data, described node identification data, described node Reference Signal Received Power data and described transmission condition information are for estimating the channel condition of the down link of described user terminal on described Resource Block in described network equipment side.
12. user terminals according to claim 11, it is characterized in that, the ratio of the reference signal power of the each node in described at least one node that described user terminal receives and the reference signal power of the described service node that this user terminal receives, is greater than a predefined power ratio threshold value.
The method of 13. 1 kinds of user terminal of network equipment estimation downlink channel conditions on a Resource Block in junction network, the method comprising the steps of:
-described user terminal sends service node received power data, and it is used to indicate the relevant information of the power of the reference signal that a service node under this user terminal that described user terminal receives launches;
The power of the reference signal that-described user terminal sends according to received multiple nodes, determines that at least one node is the node relevant to this user terminal;
-described user terminal sends node identification data, and it is used to indicate the mark of described at least one node;
-described user terminal sends node Reference Signal Received Power data, and it is used to indicate the relevant information of the power of the reference signal that described at least one node that described user terminal receives launches;
-described the network equipment receives described service node received power data;
-described the network equipment receives described node identification data;
-described the network equipment receives described node Reference Signal Received Power data;
-described the network equipment obtains the transmission condition information of described at least one node on described Resource Block; And
-described the network equipment, according to described service node received power data, described node identification data, described node Reference Signal Received Power data and described transmission condition information, is estimated the channel condition of the down link of described user terminal on described Resource Block.
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| PCT/CN2009/074315 WO2011038542A1 (en) | 2009-09-29 | 2009-09-29 | Method and equipment for estimating downlink channel condition |
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