CN104349466A - Method for supporting double connection in a communication system based on carrier wave aggregation - Google Patents
Method for supporting double connection in a communication system based on carrier wave aggregation Download PDFInfo
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- CN104349466A CN104349466A CN201310330335.5A CN201310330335A CN104349466A CN 104349466 A CN104349466 A CN 104349466A CN 201310330335 A CN201310330335 A CN 201310330335A CN 104349466 A CN104349466 A CN 104349466A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signaling for the administration of the divided path
- H04L5/0096—Indication of changes in allocation
- H04L5/0098—Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/15—Setup of multiple wireless link connections
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/16—Interfaces between hierarchically similar devices
- H04W92/20—Interfaces between hierarchically similar devices between access points
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Abstract
The invention provides a method for supporting double connection in a first base station of a communication system based on carrier wave aggregation. The first base station is at least in charge of one or more slave districts, and each slave district has an activation state and a deactivation state. The method comprises the following steps: when the first base station is about to change the state of the slave district distributed to user equipment, sending request messages to other base stations, the request messages at least comprising the identification of the user equipment; receiving response messages from other base stations, the response messages at least comprising the identification of the user equipment, the index numbers of the slave districts distributed by other base stations to the user equipment and the states of the slave districts corresponding to the index numbers; and based on the response messages, generating and sending an MAC-layer control signaling to the user equipment, the MAC-layer control signaling being used for indicating the states of all the slave districts distributed to the user equipment.
Description
Technical field
The present invention relates to the communication technology, particularly relating to a kind of for supporting the method for dual link in based on the communication system of carrier aggregation.
Background technology
According to present research state, in RAN2, discuss the research project strengthening high-rise (Small Cell enhancement-high layer) for small-cell.A free-revving engine of this project is the support for " dual link (dual connectivity) " feature.For this feature, subscriber equipment keeps communicating with at least two distributed base stations simultaneously, and these base stations are connected by nonideal backhaul.
In order to support dual link, a kind of possible solution addressed this problem is the framework based on carrier aggregation.Wherein, a kind of possible scene is that macrocell is overlapping with small-cell, and SCE research project is using the emphasis of this scene as research.According to the concept of carrier aggregation, macrocell will be used as main plot, and slight going will be used as from community.When subscriber equipment enters or leave the coverage of small-cell, small-cell can by as being assigned with from community or discharging.Main advantage is, does not therefore need the change of main plot when subscriber equipment enters the coverage of macrocell, so reduce handoff procedure.Subscriber equipment enters or leaves the interpolation or releasing operation that to be only regarded as from community from community.In brief, dominant base and multiple carrier wave can be controlled respectively from base station.Such as, dominant base can administer a main plot, and/or zero or one or more from community.And zero or one or more from community can be administered from base station.
According to the concept of carrier aggregation, there is two states from community, namely activate and deexcitation.The former allows from the transfer of data community, and the latter can not transmit data until be activated again from community.In R10/R11, activation from community and deexcitation are set by the control signal of MAC layer, and the state how determining from community is the decision of base station completely.Typically, in order to activation/deactivation is from community, need to consider multiple factor, such as frequency content, data cached state, from cell data loading condition etc.In the situation considering dual link, with the addition of from base station from after community, channel condition can be estimated by the CQI feedback of subscriber equipment from base station.The data cached state of relevant user equipment and the data payload situation from community can also obtained from base station.Therefore, it is possible to reasonably think from base station by responsible activation and deexcitation its oneself from community.Similarly, can reasonably think dominant base by responsible activation and deexcitation its oneself from community.Namely only know its oneself the state from community from base station and dominant base but do not know other the state from community.According to the control signal of the MAC layer from community activation/deactivation of R10 definition, indicate all current states from community distributing to subscriber equipment in 1 byte (8 bit) of loading section.Further, subscriber equipment will check the state from community of each current distribution by the bit read in the control signal of this MAC layer.But in R12, when supporting dual link, two distributed base stations only may know its state from community of oneself distributing.This just brings problem to the generation of the control signal of the MAC layer from community activation/deactivation and transmission.
Summary of the invention
In order to solve the problem, according to a first aspect of the invention, propose a kind of in based on the first base station in the communication system of carrier aggregation for supporting the method for dual link, wherein, described first base station at least administers one or more from community, each have activation and deactivation status from community, described method comprises the steps:-when by change, it distributes to the state from community of subscriber equipment in described first base station, send a request message to other base stations, described request message at least comprises the mark of described subscriber equipment;-receiving response message from other base stations, described response message at least comprises the mark of described subscriber equipment, other base station assigns described to the call number from community of described subscriber equipment and the state from community corresponding with described call number; And-based on described response message, produce and send the control signal of MAC layer to described subscriber equipment, the control signal of wherein said MAC layer is used to indicate all states from community distributing to described subscriber equipment.
In addition, propose a kind of in based on the second base station in the communication system of carrier aggregation for supporting the method for dual link, wherein, described second base station at least administers one or more from community, each have activation and deactivation status from community, described method comprises the steps:-receive request message from the first base station, and described request message at least comprises the mark of described subscriber equipment; And-sending response message based on described request message to described first base station, described response message at least comprises the mark of described subscriber equipment, described second base station assigns to the call number from community of described subscriber equipment and the state from community corresponding with described call number.
According to a second aspect of the invention, propose a kind of in based on the dominant base in the communication system of carrier aggregation for supporting the method for dual link, wherein, in described communication system, described dominant base administers a main plot and/or one or more from community, one or more from community from base station administration, each have activation and deactivation status from community, described method comprises the steps:-when by change, it distributes to the state from community of subscriber equipment to described dominant base, produce and send the control signal of the first MAC layer to described subscriber equipment, the control signal instruction of wherein said first MAC layer is described give described subscriber equipment from base station assigns be all in deactivation status from the state of community, and the control signal of described first MAC layer also indicates described dominant base to distribute to the state from community of described subscriber equipment, or described method comprise the steps:-from described from base station receive Indication message, described Indication message be used to indicate described dominant base to described subscriber equipment send comprise described from base station assigns to the control signal of the second MAC layer of the state from community of described subscriber equipment, wherein said Indication message at least comprise described subscriber equipment mark, described from base station assigns to the call number from community of described subscriber equipment and the state from community corresponding with described call number, and-based on described Indication message, produce and send the control signal of described second MAC layer to described subscriber equipment, the control signal of wherein said second MAC layer is used to indicate all states from community distributing to described subscriber equipment.
In addition, propose a kind of based in the communication system of carrier aggregation from base station for supporting the method for dual link, wherein, in described communication system, dominant base administers a main plot and/or one or more from community, described one or more from community from base station administration, each have activation and deactivation status from community, described method comprise the steps: when described from base station by change its distribute to the state of the community of subscriber equipment time, state of activation is in from base station assigns at least one community of described subscriber equipment if described, then produce and send the control signal of MAC layer to described subscriber equipment, the control signal of wherein said MAC layer only indicate described from base station assigns to the state of the community of described subscriber equipment, all be in deactivation status to the current from community of described subscriber equipment if described from base station assigns, then send Indication message to described dominant base, with allow described dominant base to described subscriber equipment send comprise described from base station assigns to the control signal of the MAC layer of the state from community of described subscriber equipment, wherein said Indication message at least comprise described subscriber equipment mark, described from base station assigns to the call number from community of described subscriber equipment and the state from community corresponding with described call number.
In addition, propose a kind of in based on the subscriber equipment in the communication system of carrier aggregation for supporting the method for dual link, wherein, in described communication system, dominant base administers a main plot and/or one or more from community, one or more from community from base station administration, each have activation and deactivation status from community, described method comprises the steps:-based on described give described subscriber equipment from base station assigns whether be in from least one community the control signal that state of activation reads MAC layer, the control signal of described MAC layer is used to indicate the state from community distributing to described subscriber equipment.
According to a third aspect of the invention we, propose a kind of in based on the first base station in the communication system of carrier aggregation for supporting the method for dual link, wherein, described first base station at least administers one or more from community, each have activation and deactivation status from community, described method comprises the steps:-in the control signal of MAC layer, indication bit is set, its equipment for indicating user reads all states from community distributing to described subscriber equipment in the control signal of MAC layer, or instruction only reads described first base station assigns to the state from community of described subscriber equipment, and-control signal of described MAC layer is sent to described subscriber equipment.
In addition, propose a kind of in based on the subscriber equipment in the communication system of carrier aggregation for supporting the method for dual link, wherein, in described communication system, base station comprises dominant base and from base station, described dominant base administers a main plot and/or one or more from community, described one or more from community from base station administration, each have activation and deactivation status from community, described method comprises the steps:-reads based on the indication bit the control signal from described dominant base or the described MAC layer from base station reception the state from community distributing to described subscriber equipment in the control signal of described MAC layer, wherein said indication bit indicates all states from community distributing to described subscriber equipment in the control signal of described subscriber equipment reading MAC layer, or instruction only reads the base station assigns of the control signal sending described MAC layer to the state from community of described subscriber equipment.
Various aspects of the present invention are more clear by the explanation by specific embodiment hereinafter.
Accompanying drawing explanation
By reading the detailed description done non-limiting example done with reference to the following drawings, other features, objects and advantages of the present invention will become more apparent:
Fig. 1 shows the method flow diagram for supporting dual link according to first embodiment of the invention;
Fig. 2 shows the method flow diagram for supporting dual link according to second embodiment of the present invention;
Fig. 3 shows the method flow diagram for supporting dual link according to the 3rd embodiment of the present invention;
Fig. 4 shows the method flow diagram for supporting dual link according to the 4th embodiment of the present invention;
Fig. 5 shows the form of the control signal of MAC layer according to an embodiment of the invention; And
Fig. 6 shows the method flow diagram for supporting dual link according to the 5th embodiment of the present invention.
In the drawings, run through different diagrams, same or similar Reference numeral represents identical or corresponding parts or feature.
Embodiment
In the present invention, propose the reciprocal process between three kinds of base stations (dominant base, from base station), thus realize the application of MAC control signal in R12 of R10/R11 definition.
The first: X2 signaling, for realizing the base station of request to requested base station inquiry from the state of community, this X2 signaling needs the mark at least comprising subscriber equipment.
The second: X2 signaling, for realizing requested base station by the base station of from the state of community the be sent to request relevant to subscriber equipment, this X2 signaling needs at least to comprise the mark of subscriber equipment, the call number from community distributing to subscriber equipment and the state from community corresponding with call number.
The third: X2 signaling, the transmission being used to indicate the control signal of the MAC layer of being undertaken by request base station terminates.
In addition, the invention allows for the control signal that two kinds of new schemes realize the MAC layer of the state be used to indicate from community.
Scheme one: based on the scheme of the recessiveness of the operation between base station and subscriber equipment;
Scheme two: by comprising the operation that indication bit having to explicitly guides subscriber equipment in the control signal of MAC layer.
Finally, in order to embodiment one and scheme two, propose following two kinds of technology:
1. for scheme one: propose the new rule for base station and subscriber equipment;
2. for scheme two: " R " bit redefined in the control signal of MAC layer comes
How equipment for indicating user reads the load of the control signal of MAC layer.
As mentioned before, in R12, when supporting dual link, reasonably can think that dominant base and the activation/deactivation from community drawn oneself up respectively from base station operate.This just causes each base station of following situation only to learn its state from community of oneself distributing.Therefore, the control signal how producing the MAC layer of relevant activation/deactivation is a problem.In R10/11 definition, all states from community relevant to a subscriber equipment will be comprised in the control signal of MAC layer.
Another problem is the control signal how sending MAC layer when R12 to subscriber equipment.In R10/R11, for the position not restriction of the control signal of the MAC layer of transmission activation/deactivation.That is, the control signal of MAC can be sent by main plot, also can send by from community.The control signal of this MAC layer in R10 comprises the state from community of all current distribution, and all bits checked in the control signal of MAC layer are learned each current state from community distributing to it by subscriber equipment.
In R12, because main plot is always activated, so dominant base can send the control signal of the MAC layer from cell status of relevant dominant base administration.For the state from community from base station, it can both can, by dominant base transmission, also can pass through to transmit from base station.The former is for following situation: not do not activate from base station from community, even if or exist activate from base station from community, there is no available scheduling resource yet.For the latter, at least exist one activate from base station from community, and scheduling resource can be used.
Based on above-mentioned discussion, about the scheme of the control signal of the MAC layer of R12 Zhong Cong community activation/deactivation, propose following two schemes:
Scheme 1: the control signal still using the MAC layer defined in R10, wherein the control signal of this MAC layer carries dominant base and is all states from community of user equipment allocation from base station.Further, operating process/X2 signaling is newly defined in this scenario mutual to what realize between each base station.
Scheme 2: what each base station was distributed separately is transmitted independently to subscriber equipment from the state of community.This just means that the control signal of MAC layer only comprises the state from community of the base station belonging to transmission.Therefore, by a kind of operating process between the base station and the user equipment newly of proposition.
Hereafter first scheme 1 will be discussed:
For scheme 1, the control signal of MAC layer should comprise all states from community distributing to subscriber equipment, as R10 define.And as mentioned above, the slight state of himself administering only is learned in each base station.When (request base station, a base station, can be dominant base or from base station) when wanting to change the state from community oneself distributing to subscriber equipment, it needs (the requested base station, base station with other, can be dominant base or from base station) learn that other base station assigns are to the state from community of subscriber equipment alternately, thus produce and contain all control signals distributing to the MAC layer of the state from community of subscriber equipment.In order to realize the program, need to arrange a kind of new X2 signaling to support the reciprocal process between base station, this does not support in R11.
At this, this X2 signaling (the X2 signaling for asking) at least should comprise the mark of subscriber equipment, so that requested base station learns that the state from community of which subscriber equipment should be sent to the base station of request.Responsively, requested base station should indicate the relevant state from community, and by the transmission of X2 message.This message will at least comprise the mark of subscriber equipment, requested base station assigns to the call number from community of subscriber equipment and the state from community corresponding with call number.
Additionally, in order to implementation 1, also need following setting: before the control signal end of transmission of the MAC layer of the previous base station transmission by asking, requested base station does not allow the control signal of the MAC layer producing/send oneself, namely, before the control signal end of transmission of the MAC layer of the previous base station transmission by asking, requested base station does not allow again to attempt changing its state from community controlled.This just means the control signal not allowing requested base station self to send MAC layer, or allows other base stations again send the control signal of MAC layer.Avoid subscriber equipment to receive the control signal of multiple different MAC layer thus, thus cause the confusion of operation.Such as, due to nonideal delay, the control signal of the MAC layer produced by the base station of asking may more lately than the control signal of the MAC layer produced by requested base station be received by subscriber equipment, and the operation causing subscriber equipment is thus chaotic.Therefore, need to make as given a definition: the base station of request will receive the feedback of the control signal in response to MAC layer from subscriber equipment, and determine whether the transmission of the control signal of MAC layer terminates based on feedback.At the end of the transmission of control signal determining MAC layer, send acknowledge message to requested base station, it indicates the transmission of the control signal of the MAC layer of being undertaken by it to terminate.Requested base station can be known and can produce safely now and send the control signal of MAC layer, and can not affect the operation of subscriber equipment.
Based on above-mentioned discussion, will such as take following flow process.Fig. 1 shows the method flow diagram for supporting dual link according to first embodiment of the invention.
In step S101, when base station A (dominant base or from base station, request base station) by change its distribute to the state from community of subscriber equipment time, in generation and before sending the control signal of MACE layer, it will to be sent a request message to other base stations B by X2 interface and inquire about the current state from community that other base stations B (requested base station) distributes to this subscriber equipment.The mark of subscriber equipment is comprised, so that requested base station B feeds back correct information at this request message.
In step s 102, responsively, requested base station B feeds back it for corresponding to the current state from community of the user equipment allocation of the mark of the subscriber equipment in request message by X2 interface to the base station A asked.The call number from community that this response message at least comprises the mark of subscriber equipment, requested base station B distributes to subscriber equipment and the state from community corresponding with call number, to guarantee to produce in subsequent step and to send the control signal of correct MAC layer.
In step s 103, the base station A of request is based on response message, produce and send the control signal of MAC layer to subscriber equipment, wherein the control signal of MAC layer is used to indicate all states from community distributing to subscriber equipment, namely comprises this state from community being user equipment allocation as the state from community and each other base stations (such as the base station B) of user equipment allocation of base station A.
In step S104, base station A receives the feedback in response to the control signal of MAC layer from subscriber equipment, and determines whether the transmission of the control signal of MAC layer terminates based on feedback.
In step S105, if base station A determines that the transmission of the control signal of MAC layer terminates, then it sends acknowledge message to base station B, and it indicates the transmission of the control signal of the MAC layer of being undertaken by base station A to terminate.Thus after this requested base station B can attempt changing its state from community controlled again, such as, produce and send the control signal of the possible MAC layer of oneself or allow other base stations (such as base station A) again send the control signal of MAC layer.
The advantage of this scheme is that the impact for standard is less, and newly defines and realize flow process mutual between two base stations.In the above-described embodiments, base station A can be dominant base, also can be from base station.Similarly, base station B can be dominant base, also can be from base station.
Enter on now scheme 2:
In order to solve delay problem better, scheme 2 can be adopted.For scheme 2, by the generation of the control signal of activation/deactivation MAC layer new for definition and delivery plan, so that the state from community of different base station administrations can be transmitted independently.This just means the state from community that the base station that the control signal of a MAC layer only can carry this control signal of transmission is administered.Thus, no longer need interactive information between different base station, therefore no longer there will be time delay.For scheme 2, another focuses on, and needs to guarantee that subscriber equipment only reads the part in the control signal of MAC layer, and ignores other parts.Namely in order to implementation 2, need to allow subscriber equipment learn in the control signal of MAC layer and include the current state from community for user equipment allocation of which base station, following two kinds of execution modes can be considered at this:
Scheme one: based on the scheme of the recessiveness of the operation between base station and subscriber equipment;
Scheme two: by comprising the operation that indication bit having to explicitly guides subscriber equipment in the control signal of MAC layer.This two schemes will be described below in detail.
Scheme one:
For the program, a kind of solution of generation/transmission and the operating process (these do not support in R11) of respective user equipment of control signal of new activation/deactivation MAC layer will be proposed:
For the control signal from the MAC layer sent from base station from community,
It only comprises this state from community distributing to subscriber equipment from community of administering from base station; And
Subscriber equipment only should read and those bits relevant from community above-mentioned, and ignores other bits.
For the control signal of the MAC layer sent from dominant base, the state from community distributing to subscriber equipment from community of dominant base administration naturally should be comprised.In some instances, dominant base also should be responsible for carrying from base station assigns to the state from community of subscriber equipment.Such as when from base station be all in unactivated state from community, and now from base station to dominant base request allow dominant base to subscriber equipment send from base station administration the state from community distributing to subscriber equipment.In addition, for from base station to be all in from community inactive situation from base station not to dominant base request send from base station administration distribute to subscriber equipment from this situation of the state of community, all be set to for 0 (namely showing that they are all in deactivation status) to the bit relevant from community from base station in the control signal of the MAC layer that it sends by dominant base, and instruction dominant base is also distributed to the state from community of subscriber equipment by the control signal of this MAC layer.
Therefore, for the control signal of the MAC layer sent from dominant base, there is the following two kinds situation:
The control signal of situation 1:MAC layer comprises the state from community that dominant base distributes to subscriber equipment, and is all set to deexcitation to subscriber equipment from the state of community from base station assigns;
The control signal of situation 2:MAC layer comprise dominant base and from base station assigns to the state from community of subscriber equipment, this and R11 are similar.
Problem is how to make subscriber equipment be separated above-mentioned two kinds of situations, thus correctly understands the control signal being received from the MAC layer of dominant base.For this problem, the transmission plan (this does not support among R11) for the state from community from base station will be proposed:
If be all in deactivation status from base station assigns to the current from community of subscriber equipment, if need the signaling sending MAC layer, then dominant base must be asked to carry out the transmission of the signaling of MAC layer from base station.Thus, dominant base will be sent to from the relevant state from community of base station.
Whether subscriber equipment is based on from base station assigns being in state of activation from least one community and being implicitly separated above-mentioned two kinds of situations to subscriber equipment.
Based on above-mentioned new solution, by definition operating process below.
The rule of the generation of the control signal of MAC layer and the base station side of transmission:
1. the control signal that the state from community of dominant base changes the MAC layer caused will only be sent by dominant base.This will be rational, because the main plot of dominant base administration is at least activate.
2. the control signal changing from the state from community of community the MAC layer caused can be sent by dominant base, also can send by from base station, will follow following rule:
If be a. all in deactivation status from base station assigns to the current from community of subscriber equipment, if send from base station requests dominant base and inform dominant base by relevant from the state of community, then about being sent by dominant base from the control signal of the MAC layer of the state from community of base station.
For this rule, pass through X2 signalling to dominant base from base station by the relevant state from community, such as, can pass through the mode described in scheme 1, so that dominant base produces the control signal of relevant MAC layer.
Secondly, same needs to be forbidden from base station again attempting changing before receiving its message terminated the transmission of the control signal of MAC layer sent by dominant base from base station assigns to the state from community of subscriber equipment, namely such as forbid self sending the control signal of new MAC layer from base station or forbidding sending from base station requests dominant base the control signal of new MAC layer.At this, the similar interactive mode in scheme 1 can be adopted equally.
If be b. in state of activation to subscriber equipment from least one community from base station assigns, then produce from base station and send the control signal of MAC layer to subscriber equipment, wherein the control signal of MAC layer only indicates from base station assigns to the state from community of subscriber equipment.
Similarly, the operating process defining new user equipment side is needed to ensure the correct reception of the control signal for MAC layer:
1. for the control signal of the MAC layer received from dominant base,
-when from base station assigns to subscriber equipment be in described state of activation from least one community time, subscriber equipment ignore from dominant base receive MAC layer control signal from base station assigns to the state from community of subscriber equipment;
-when from base station assigns give described subscriber equipment from community, be all in unactivated state time, subscriber equipment read from dominant base receive MAC layer control signal from base station assigns to the state from community of subscriber equipment; And
2. for the control signal from the MAC layer received from base station,
-only read being somebody's turn to do from base station assigns to the state from community of subscriber equipment in the control signal of this MAC layer, and ignore other bits in the control signal of other these MAC layer.
The embodiment corresponding to scheme one is provided referring to accompanying drawing.
Fig. 2 shows the method flow diagram for supporting dual link according to second embodiment of the present invention.This embodiment corresponds to the situation of the control signal being sent MAC layer by dominant base.
In fig. 2, in step s 201, dominant base is wanted to change the state from community that it distributes to subscriber equipment, therefore which creates the control signal of corresponding MAC layer.Indicate dominant base to distribute to the state from community of subscriber equipment in the control signal of this MAC layer, and be all set to deexcitation to subscriber equipment from the state of community from base station assigns in the control signal of this MAC layer.
In step S02, whether subscriber equipment is in from least one community the control signal that state of activation reads MAC layer to subscriber equipment based on from base station assigns.
Specifically, when from base station assigns to subscriber equipment be in state of activation from least one community time, subscriber equipment ignore the control signal of the MAC layer received from dominant base from base station assigns to the state from community of described subscriber equipment.Namely only to read and the bit relevant from the state of community of subscriber equipment is distributed in main plot, and ignore those be all set to deexcitation to from base station assigns to the bit relevant from community of subscriber equipment.
And when from base station assigns to subscriber equipment from community, be all in unactivated state time, subscriber equipment by read the control signal of the MAC layer received from dominant base from base station assigns to the state from community of described subscriber equipment.Namely in this case, subscriber equipment by read MAC layer control signal in dominant base and from base station assigns to all bits relevant from the state of community of subscriber equipment.
Fig. 3 shows the method flow diagram for supporting dual link according to the 3rd embodiment of the present invention.This base station corresponds to the situation of the control signal being sent MAC layer by dominant base.
As shown in Figure 3, will the state that it distributes to the community of subscriber equipment be changed from base station, and now all be in deactivation status from base station assigns to the current from community of subscriber equipment.
Now, in step S301, Indication message is sent to dominant base from base station, with allow dominant base to subscriber equipment send comprise from base station assigns to the control signal of the MAC layer of the state from community of subscriber equipment, wherein Indication message at least comprise subscriber equipment mark, from base station assigns to the call number from community of subscriber equipment and the state from community corresponding with call number.
In step s 302, dominant base is based on Indication message, produce and send the control signal of MAC layer to subscriber equipment, wherein the control signal of this MAC layer is used to indicate all states from community distributing to subscriber equipment, namely comprise dominant base and from base station assigns to the state from community of subscriber equipment.
Now, as mentioned before, owing to being all in deactivation status from base station assigns to the current from community of subscriber equipment, subscriber equipment by read MAC layer control signal in dominant base and from base station assigns to all bits relevant from the state of community of subscriber equipment.
In step S303, dominant base receives the feedback in response to the control signal of MAC layer from subscriber equipment, and determines whether the transmission of the control signal of MAC layer terminates based on feedback.
In step s 304, if dominant base determines that the transmission of the control signal of MAC layer terminates, then it sends acknowledge message to from base station, and it indicates the transmission of the control signal of the MAC layer of being undertaken by dominant base to terminate.Thus after this can again attempt from base station changing its state from community controlled, such as produce and send the control signal of the possible MAC layer of oneself or allow dominant base again send the control signal of MAC layer.
Fig. 4 shows the method flow diagram for supporting dual link according to the 4th embodiment of the present invention.This base station corresponds to the situation by the control signal sending MAC layer from base station.
As shown in Figure 4, will be changed it from base station and distribute to the state of the community of subscriber equipment, and now from base station assigns to subscriber equipment from community, at least one is in state of activation.
In step S401, produce from base station and send the control signal of MAC layer to subscriber equipment, wherein the control signal of MAC layer only indicates from base station assigns to the state of the community of subscriber equipment.
In step S402, subscriber equipment will only read being somebody's turn to do from base station assigns to the state from community of subscriber equipment in the control signal of this MAC layer.
Scheme two:
In order to avoid the limitation of scheme one, and the character that the control signal still retaining MAC layer in R10 can send on the community of any activation, scheme two can be adopted.Wherein, base station having to explicitly indicates being included in the control signal of MAC layer from the state of community of which base station.This is redefined by the reservation bit " R " of the control signal to the MAC layer defined in R10 to realize.
In one embodiment of the invention, in order to implementation 2, reservation bit " R " redefines to indicate the control signal of MAC layer whether also to comprise the state from community of other base stations by the base station sending the control signal of MAC layer.
Fig. 5 shows the form of the control signal of MAC layer according to an embodiment of the invention.As shown in Figure 5:
R=1, dominant base and be that all states from community of user equipment allocation are all included in the control signal of this MAC layer from base station.Therefore, subscriber equipment will read MAC layer control signal in all bits.
R=0, the base station that the control signal of MAC layer only comprises the control signal sending this MAC layer is the state from community of user equipment allocation.Therefore, the bit that will ignore about another base station of subscriber equipment.Such as, if dominant base have sent the control signal of MAC layer, then subscriber equipment will ignore the relevant bit from the state from community of base station.Otherwise if having sent the control signal of MAC layer from base station, then subscriber equipment will only read and be somebody's turn to do the bit from community relevant from base station.
The technology of this area should be appreciated that the definition of above-mentioned R=1 and R=0 is only schematic, and nonrestrictive.The definition of such as R=1 and R=0 can be exchanged.
Hereafter will discuss various relevant situation in detail.
When dominant base wants that changing it distributes to the state from community of subscriber equipment, the following two kinds operation may be related to:
Operation 1:
If 1. dominant base is not learned from base station assigns to the state from community of subscriber equipment, then dominant base will produce and sends the control signal of MAC layer, such as, send on main plot, and be set to equal 0 by R.And in user equipment side, due to R=0 and the control signal of this MAC layer from dominant base.Therefore, the bit relevant from the state of community to dominant base only noted by subscriber equipment, and ignore other bits.
2. on the other hand, if dominant base to be learned from base station assigns to the state from community of subscriber equipment, then R is set to equal 1, so as subscriber equipment also can read in the control signal of MAC layer to the bit relevant from the state of community from base station.This such as can be applied in following scene: such as from all states being all in deexcitation from community of base station, or wants the state from community changing its administration from base station there is not descending scheduling resource from base station.Additionally, for this situation, dominant base also by the acknowledge message that the transmission to the control signal sending MAC layer from base station has terminated, thus allows the transmission of the control signal of the MAC layer follow-up from base station.
Operation 2:
If dominant base is wanted to make the control signal sending MAC layer from base station, such as, do not have descending scheduling resource at dominant base place, then dominant base is distributed to sending to from base station from the state of community of subscriber equipment.Transfer the control signal producing MAC layer from base station, and R is set to 1.Thus in user equipment side, when receiving when the control signal of the MAC layer of base station, it can not ignore the bit relevant from the state of community to dominant base.
When wanting that from base station changing it distributes to the state from community of subscriber equipment, following operation may be related to:
If do not learn that from base station dominant base distributes to the state from community of subscriber equipment, the control signal of MAC layer then sent from base station is only contained from base station assigns to the state from community of subscriber equipment, and the control signal of this MAC layer is arranging transmission from base station with R=0.In user equipment side, subscriber equipment will only read and the bit relevant from community from base station.
On the other hand, if learn that from base station dominant base distributes to the state from community of subscriber equipment, such as, as the situation (wherein, dominant base wishes the state from community of informing subscriber equipment dominant base from base station) of aforesaid operations 2, then R is set to 1.In user equipment side, subscriber equipment by reading to dominant base and from base station assigns to all bits relevant from the state of community of subscriber equipment.Additionally, also can notify the control signal end of transmission of dominant base MAC layer from base station, so that dominant base carries out the transmission of the control signal of self possible MAC layer follow-up.
In addition, if such as there is no descending scheduling resource from base station side, although not do not activate from community or have activation from community, there is no scheduling resource, then send the control signal of MAC layer to subscriber equipment from base station by request dominant base.Now, in dominant base side, the control signal of MAC layer will be produced with R=1, thus subscriber equipment by reading to dominant base and from base station assigns to all bits relevant from the state of community of subscriber equipment.
Based on above-mentioned possible situation in detail, visible such scheme is to the control signal not restriction producing/send corresponding MAC layer.But need at this delay considering imperfect backhaul.Such as, when from base station be user equipment allocation sent to dominant base by X2 signaling from the state of community, this signaling will experience at most the delay of 60ms.That is, the control signal of corresponding MAC layer will at least be sent out after 60ms.If during this 60ms, if can use from the descending scheduling resource of base station, then likely from base station, oneself is sent the control signal of another MAC layer.Due to the problem that HARQ retransmits, subscriber equipment likely receives the control signal of above-mentioned two MAC layer with different orders, thus causes the operation of the mistake of user equipment side.Therefore, if the control signal of another base station of base station requests transmission MAC layer, then requested base station needs the base station of notice request after terminating the transmission of the control signal of MAC layer again.Thus at this moment, the base station of request just can start the control signal transmission of the possible MAC layer of self, thus avoids the problems referred to above.
Hereafter composition graphs 6 pairs of such schemes 2 are described in detail.Fig. 6 shows the method flow diagram for supporting dual link according to the 5th embodiment of the present invention
As shown in Figure 6, in step s 601, base station arranges indication bit in the control signal of MAC layer, its equipment for indicating user reads all state from community (dominant base and from base station assigns to the state from community of subscriber equipment) distributing to subscriber equipment in the control signal of MAC layer, or instruction only reads the base station assigns of the control signal sending MAC layer to the state from community of subscriber equipment.This base station can be dominant base, also can be from base station.
Such as, when dominant base is not learned from the state from community of base station assigns to subscriber equipment, the state from community that indication bit in the control signal of MAC layer is set to indicate described subscriber equipment only to read dominant base distributes to subscriber equipment by dominant base, on the contrary then the indication bit in the control signal of MAC layer is set to equipment for indicating user and reads all states from community distributing to subscriber equipment in the control signal of MAC layer.For from base station, also there is similar situation, be not described in detail in this.
In step S602, base station sends the control signal of this MAC layer to subscriber equipment.
In step S603, the indication bit in the control signal based on the MAC layer received from base station is read the state from community distributing to subscriber equipment in the control signal of MAC layer by subscriber equipment.
Particularly, when indication bit equipment for indicating user read in the control signal of MAC layer distribute to all states from community of subscriber equipment time, subscriber equipment reads all relevant bit in the control signal of MAC layer.
Otherwise when the state from community to subscriber equipment of the base station assigns of control signal sending MAC layer is only read in indication bit instruction, subscriber equipment will only read the bit relevant with the state of the small-cell of the base station of the control signal of this MAC layer of transmission.
It should be noted that, above-described embodiment is only exemplary, but not limitation of the present invention.Any technical scheme not deviating from spirit of the present invention all should fall within protection scope of the present invention, and this comprises the different technologies feature that use occurs in different embodiments, and installation method can combine, to obtain beneficial effect.In addition, any Reference numeral in claim should be considered as the claim involved by restriction; " comprise " word and do not get rid of device unlisted in other claims or specification or step.
Claims (14)
1. one kind in based on the first base station in the communication system of carrier aggregation for supporting the method for dual link, wherein, described first base station at least administers one or more from community, and each have activation and deactivation status from community, described method comprises the steps:
-when by change, it distributes to the state from community of subscriber equipment in described first base station, send a request message to other base stations, described request message at least comprises the mark of described subscriber equipment;
-receiving response message from other base stations, described response message at least comprises the mark of described subscriber equipment, other base station assigns described to the call number from community of described subscriber equipment and the state from community corresponding with described call number; And
-based on described response message, produce and send the control signal of MAC layer to described subscriber equipment, the control signal of wherein said MAC layer is used to indicate all states from community distributing to described subscriber equipment.
2. method according to claim 1, is characterized in that, described method also comprises the steps:
-receive the feedback in response to the control signal of described MAC layer from described subscriber equipment, and determine based on described feedback whether the transmission of the control signal of described MAC layer terminates; And
-at the end of the transmission of control signal determining described MAC layer, send acknowledge message to other base stations described, it indicates the transmission of the control signal of the described MAC layer of being undertaken by described first base station to terminate.
3. one kind in based on the second base station in the communication system of carrier aggregation for supporting the method for dual link, wherein, described second base station at least administers one or more from community, and each have activation and deactivation status from community, described method comprises the steps:
-receiving request message from the first base station, described request message at least comprises the mark of described subscriber equipment; And
-sending response message based on described request message to described first base station, described response message at least comprises the mark of described subscriber equipment, described second base station assigns to the call number from community of described subscriber equipment and the state from community corresponding with described call number.
4. method according to claim 3, is characterized in that, described method also comprises:
-before receiving the confirmation message from described first base station, again do not attempt changing described second base station assigns to the state from community of described subscriber equipment, wherein, described acknowledge message indicates the transmission of the control signal of the MAC layer of being undertaken by described first base station to terminate.
5. one kind in based on the dominant base in the communication system of carrier aggregation for supporting the method for dual link, wherein, in described communication system, described dominant base administers a main plot and/or one or more from community, one or more from community from base station administration, each have activation and deactivation status from community
Described method comprises the steps:
-when by change, it distributes to the state from community of subscriber equipment to described dominant base, produce and send the control signal of the first MAC layer to described subscriber equipment, the control signal instruction of wherein said first MAC layer is described give described subscriber equipment from base station assigns be all in deactivation status from the state of community, and the control signal of described first MAC layer also indicates described dominant base to distribute to the state from community of described subscriber equipment; Or
Described method comprises the steps:
-receive Indication message from described from base station, described Indication message be used to indicate described dominant base to described subscriber equipment send comprise described from base station assigns to the control signal of the second MAC layer of the state from community of described subscriber equipment, wherein said Indication message at least comprise described subscriber equipment mark, described from base station assigns to the call number from community of described subscriber equipment and the state from community corresponding with described call number; And
-based on described Indication message, produce and send the control signal of described second MAC layer to described subscriber equipment, the control signal of wherein said second MAC layer is used to indicate all states from community distributing to described subscriber equipment.
6. method according to claim 5, is characterized in that, when from described from base station receive Indication message, described method is further comprising the steps of:
-receive the feedback in response to the control signal of described second MAC layer from described subscriber equipment, and determine based on described feedback whether the transmission of the control signal of described second MAC layer terminates; And
-at the end of the transmission of control signal determining described second MAC layer, send acknowledge message to described from base station, it indicates the transmission of the control signal of described second MAC layer of being undertaken by described dominant base to terminate.
7. one kind based in the communication system of carrier aggregation from base station for supporting the method for dual link, wherein, in described communication system, dominant base administers a main plot and/or one or more from community, described one or more from community from base station administration, each have activation and deactivation status from community, described method comprises the steps:
When described from base station by change its distribute to the state of the community of subscriber equipment time,
State of activation is in from base station assigns at least one community of described subscriber equipment if described, then produce and send the control signal of MAC layer to described subscriber equipment, the control signal of wherein said MAC layer only indicate described from base station assigns to the state of the community of described subscriber equipment;
All be in deactivation status to the current from community of described subscriber equipment if described from base station assigns, then send Indication message to described dominant base, with allow described dominant base to described subscriber equipment send comprise described from base station assigns to the control signal of the MAC layer of the state from community of described subscriber equipment, wherein said Indication message at least comprise described subscriber equipment mark, described from base station assigns to the call number from community of described subscriber equipment and the state from community corresponding with described call number.
8. method according to claim 5, is characterized in that, when described give that the community of described subscriber equipment is current is all in deactivation status from base station assigns, described method also comprises the steps:
Before receiving the confirmation message from described dominant base, the state from community of described subscriber equipment is not again given described in trial change from base station assigns, wherein, described acknowledge message indicates the transmission of the control signal of the MAC layer of being undertaken by described dominant base to terminate.
9. one kind in based on the subscriber equipment in the communication system of carrier aggregation for supporting the method for dual link, wherein, in described communication system, dominant base administers a main plot and/or one or more from community, one or more from community from base station administration, each have activation and deactivation status from community, described method comprises the steps:
-based on described from base station assigns give described subscriber equipment whether be in from least one community the control signal that state of activation reads MAC layer, the control signal of described MAC layer is used to indicate the state from community distributing to described subscriber equipment.
10. method according to claim 9, is characterized in that, based on giving whether being in from least one community the control signal that state of activation carrys out receiving mac layer and comprising further of described subscriber equipment from base station assigns:
For the control signal of the MAC layer received from described dominant base,
-when described from base station assigns give described subscriber equipment be in described state of activation from least one community time, described subscriber equipment to be ignored described in the control signal of the MAC layer received from described dominant base from base station assigns to the state from community of described subscriber equipment, and the described dominant base only read in the control signal of described MAC layer distributes to the state from community of described subscriber equipment;
-when described from base station assigns give described subscriber equipment from community, be all in described unactivated state time, described subscriber equipment reads the state from community distributing to described subscriber equipment described in the control signal of the MAC layer received from described dominant base from base station and described dominant base; And
For the control signal from the described MAC layer received from base station,
-only read being somebody's turn to do from base station assigns to the state from community of described subscriber equipment in the control signal of this MAC layer.
11. 1 kinds in based on the first base station in the communication system of carrier aggregation for supporting the method for dual link, wherein, described first base station at least administers one or more from community, and each have activation and deactivation status from community, described method comprises the steps:
-in the control signal of MAC layer, indication bit is set, its equipment for indicating user reads all states from community distributing to described subscriber equipment in the control signal of MAC layer, or instruction only reads described first base station assigns to the state from community of described subscriber equipment; And
-control signal of described MAC layer is sent to described subscriber equipment.
12. methods according to claim 11, is characterized in that, described first base station is dominant base,
When described dominant base do not learn from base station assigns to the state from community of described subscriber equipment, the state from community that the described indication bit in the control signal of described MAC layer is set to indicate described subscriber equipment only to read described dominant base distributes to described subscriber equipment by described dominant base; Or
When described dominant base learn from base station assigns to the state from community of described subscriber equipment, the described indication bit in the control signal of described MAC layer is set to indicate described subscriber equipment to read all states from community distributing to described subscriber equipment in the control signal of MAC layer by described dominant base.
13. methods according to claim 11, its feature is being, described first base station is from base station,
When described do not learn that dominant base distributes to the state from community of described subscriber equipment from base station, described from base station, the described indication bit the control signal of described MAC layer is set to indicate described subscriber equipment only read described from base station assigns to the state from community of described subscriber equipment; Or
When described learn that dominant base distributes to the state from community of described subscriber equipment from base station, describedly described indication bit the control signal of described MAC layer to be set to indicate described subscriber equipment to read all states from community distributing to described subscriber equipment in the control signal of MAC layer from base station.
14. 1 kinds in based on the subscriber equipment in the communication system of carrier aggregation for supporting the method for dual link, wherein, in described communication system, base station comprises dominant base and from base station, described dominant base administers a main plot and/or one or more from community, described one or more from community from base station administration, each have activation and deactivation status from community, described method comprises the steps:
-read the state from community distributing to described subscriber equipment in the control signal of described MAC layer based on the indication bit the control signal from described dominant base or the described MAC layer received from base station, wherein said indication bit indicates all states from community distributing to described subscriber equipment in the control signal of described subscriber equipment reading MAC layer, or instruction only reads the base station assigns of the control signal sending described MAC layer to the state from community of described subscriber equipment.
Priority Applications (3)
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| CN201310330335.5A CN104349466B (en) | 2013-07-31 | 2013-07-31 | Method for supporting dual link in the communication system polymerizeing based on carrier wave |
| PCT/IB2014/001446 WO2015015285A2 (en) | 2013-07-31 | 2014-07-15 | Method of supporting dual connectivity in a carrier aggregation based communication system |
| TW103124906A TW201517676A (en) | 2013-07-31 | 2014-07-21 | Method of supporting dual connectivity in a carrier aggregation based communication system |
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| CN201310330335.5A CN104349466B (en) | 2013-07-31 | 2013-07-31 | Method for supporting dual link in the communication system polymerizeing based on carrier wave |
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| CN104349466B CN104349466B (en) | 2018-08-24 |
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| CN107040346B (en) * | 2016-02-03 | 2020-09-01 | 中兴通讯股份有限公司 | User plane transmission channel processing method and base station |
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| CN110035480B (en) * | 2018-01-11 | 2021-06-22 | 华为技术有限公司 | Method, equipment and system for deactivating BWP |
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| CN112218344A (en) * | 2019-07-12 | 2021-01-12 | 华为技术有限公司 | Communication method and device |
| CN112218344B (en) * | 2019-07-12 | 2022-12-30 | 华为技术有限公司 | Communication method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104349466B (en) | 2018-08-24 |
| WO2015015285A2 (en) | 2015-02-05 |
| TW201517676A (en) | 2015-05-01 |
| WO2015015285A3 (en) | 2015-12-10 |
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