WO2011134337A1 - 选择成份载波的方法、基站、终端和通信系统 - Google Patents

选择成份载波的方法、基站、终端和通信系统 Download PDF

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Publication number
WO2011134337A1
WO2011134337A1 PCT/CN2011/072406 CN2011072406W WO2011134337A1 WO 2011134337 A1 WO2011134337 A1 WO 2011134337A1 CN 2011072406 W CN2011072406 W CN 2011072406W WO 2011134337 A1 WO2011134337 A1 WO 2011134337A1
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WIPO (PCT)
Prior art keywords
component carrier
carrier
terminal
available
coverage
Prior art date
Application number
PCT/CN2011/072406
Other languages
English (en)
French (fr)
Inventor
魏宇欣
Original Assignee
索尼公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to AU2011247728A priority Critical patent/AU2011247728B9/en
Priority to EP11774328.6A priority patent/EP2566248B1/en
Application filed by 索尼公司 filed Critical 索尼公司
Priority to CA2796011A priority patent/CA2796011C/en
Priority to KR1020127031413A priority patent/KR101471736B1/ko
Priority to ES11774328.6T priority patent/ES2681605T3/es
Priority to RU2012151258/08A priority patent/RU2547622C2/ru
Priority to JP2013504103A priority patent/JP5454736B2/ja
Priority to KR1020147018041A priority patent/KR101539546B1/ko
Priority to MX2012012588A priority patent/MX2012012588A/es
Priority to US13/639,368 priority patent/US8792381B2/en
Priority to KR1020157032138A priority patent/KR101612691B1/ko
Priority to KR1020147034252A priority patent/KR101570635B1/ko
Priority to EP18151458.9A priority patent/EP3337242B1/en
Priority to EP19170892.4A priority patent/EP3579486A1/en
Priority to BR112012027213-6A priority patent/BR112012027213B1/pt
Priority to MX2014010806A priority patent/MX336991B/es
Publication of WO2011134337A1 publication Critical patent/WO2011134337A1/zh
Priority to ZA2012/08896A priority patent/ZA201208896B/en
Priority to US14/310,647 priority patent/US9191927B2/en
Priority to US14/858,673 priority patent/US9408186B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/18—Network planning tools
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0072—Transmission or use of information for re-establishing the radio link of resource information of target access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/38—Reselection control by fixed network equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/02—Access restriction performed under specific conditions
    • H04W48/04—Access restriction performed under specific conditions based on user or terminal location or mobility data, e.g. moving direction, speed
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H04W72/563—Allocation or scheduling criteria for wireless resources based on priority criteria of the wireless resources
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • 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
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference

Definitions

  • the present application relates generally to the field of wireless communications, and more particularly to the field of carrier aggregation communications. More specifically, the present application relates to a method of selecting a component carrier in a carrier aggregation communication network, and a method of updating a component carrier. The application further relates to an apparatus adapted to carry out the method, comprising a base station and a terminal, and a communication system comprising the base station and the terminal.
  • LTE-A Long Term Evolution-Advanced
  • LTE Long Term Evolution-Advanced
  • Carrier Aggregation is a technology proposed by 3GPP (3rd Generation Partnership Project) to jointly transmit multiple carrier aggregations in order to support the higher transmission bandwidth requirements of future mobile communication systems. According to the location of the aggregated carrier on the spectrum, it can be divided into continuous carrier aggregation and discontinuous carrier aggregation. LTE-A will support both aggregation scenarios. 3GPP introduces carrier aggregation technology and also considers backward compatibility.
  • terminals supporting carrier aggregation and carrier aggregation will coexist for a long time, and terminals supporting carrier aggregation can be connected at the same time.
  • a terminal that enters multiple carriers without supporting carrier aggregation can only access one carrier.
  • the main component carrier PCC
  • the primary component carrier must have the functions that the common carrier does not have, and it plays an important role in the management of wireless resources.
  • the carrier corresponding to the cell used for the initial access of the terminal is naturally selected as the primary component carrier. However, as the quality of service of the user increases, it may be necessary to add a new carrier to form a carrier aggregation. As the terminal, base station, and network conditions change, it is also possible to replace or delete certain carriers in use.
  • the primary component carrier may need to be reassigned due to the user's movement and the performance of the aggregated carrier. Summary of the invention
  • a method for selecting a component carrier in a carrier aggregation communication network includes: determining a coverage range of each available carrier that the terminal can use; determining a coverage of each available carrier Whether the distribution conforms to a predetermined distribution pattern; if the predetermined distribution pattern is met, the component carrier to be used is determined based at least on the criterion determined by the distribution pattern.
  • a method of updating a primary component carrier in a carrier aggregation communication network comprising: determining a new primary component carrier using the method of the first aspect above; and from the old primary component The carrier is transferred to the new primary component carrier.
  • a method for adding a second component carrier in a carrier aggregation communication network including: determining a new second component carrier using the method described in the first aspect above; and adding The new second component carrier.
  • a device in a carrier aggregation communication network including: a terminal information acquiring unit, acquiring terminal location information and/or carrier distribution information corresponding to a terminal location; a carrier distribution mode determining unit Determining whether the distribution of the coverage of each available carrier corresponding to the location of the terminal conforms to a predetermined distribution pattern; and the component carrier determining unit, when the coverage of each available carrier corresponding to the location of the terminal conforms to the predetermined distribution mode, Determining at least a component carrier to be used according to a criterion determined by the distribution mode; and a notifying unit that notifies the determined component carrier to be used to the counterpart device.
  • the component carrier may be a primary component carrier or a second component carrier.
  • the above device may be a base station, wherein the counterpart device is a terminal that communicates with the base station.
  • the above device may also be a terminal, wherein the counterpart device is a base station that communicates with the terminal.
  • a communication system including the above-described base station and/or terminal is also provided.
  • the component carrier to be used can be reasonably selected.
  • Another object of the present application is to provide a method of updating a primary component carrier, and a corresponding base station and terminal, and a communication system.
  • a method for updating a primary component carrier in a carrier aggregation communication network comprising: acquiring state information of a terminal, a base station, and/or a primary component carrier; Whether the status information meets the predetermined condition; replaces the old primary component carrier with the new primary component carrier if the predetermined condition is met.
  • a base station in a carrier aggregation communication network including: a state acquiring unit, acquiring state information of a terminal, a base station, and/or a primary component carrier; a state determining unit, determining the Whether the status information meets the predetermined condition; and the primary component carrier updating unit replaces the old primary component carrier with the new primary component carrier if the predetermined condition is met.
  • a terminal suitable for a carrier aggregation communication network including: a reconfiguration information receiving unit, configured to receive “radio resource control” reconfiguration information from a base station; a radio resource configuration unit And configured to configure a new primary component carrier according to the radio resource configuration information included in the “radio resource control” reconfiguration information; and a deactivation unit, configured to perform according to a preset or deactivated according to the base station The command deactivates the old primary component carrier.
  • a communication system including the above base station and terminal is also provided.
  • Still another object of the present application is to provide a method and apparatus for updating a second component carrier, and a corresponding base station, terminal, and communication system.
  • a method for updating a second component carrier in a carrier aggregation communication network comprising: acquiring state information of a terminal, a base station, and/or a second component carrier; Whether the status information meets a predetermined condition; adding a new second component carrier or replacing the old second component carrier with a new second component carrier if the predetermined condition is met.
  • a base station in a carrier aggregation communication network including: a state acquiring unit, acquiring state information of a terminal, a base station, and/or a second component carrier; a state determining unit, determining the location Whether the status information meets the predetermined condition; and the second component carrier updating unit adds the new second component carrier or replaces the old second component carrier with the new second component carrier if the predetermined condition is met.
  • a terminal suitable for a carrier aggregation communication network including: a reconfiguration information receiving unit, configured to receive "radio resource control" reconfiguration information from a base station; and radio resource configuration And a unit, configured to configure a new second component carrier according to the radio resource configuration information included in the “radio resource control” reconfiguration information.
  • a communication system including the above base station and terminal is also provided.
  • the component carrier to be used can be efficiently updated.
  • FIG. 1 is a flow chart of a method of selecting a component carrier according to a first embodiment of the present application
  • Figure 2 is a schematic illustration of a first scenario to which the method of the first embodiment of the present application applies;
  • FIG. 3 is a schematic illustration of a second scenario to which the method of the first embodiment of the present application applies;
  • Figure 4 is a schematic illustration of a third scenario to which the method of the first embodiment of the present application applies;
  • FIG. 5-7 is a schematic diagram of three situations of terminal position and its motion state in the third scenario shown in FIG. 4;
  • FIG. 8 is a flowchart of a method of selecting a component carrier according to another embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a terminal suitable for selecting a component carrier according to an embodiment of the present application.
  • FIG. 10 is a schematic diagram showing the structure of a terminal suitable for selecting a component carrier according to another embodiment of the present application.
  • FIG. 11 is a schematic diagram showing the structure of a terminal suitable for selecting a component carrier according to still another embodiment of the present application.
  • FIG. 12 is a structure of a base station suitable for selecting a component carrier according to an embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of a base station suitable for selecting a component carrier according to another embodiment of the present application.
  • FIG. 14 is a schematic diagram showing the structure of a base station suitable for selecting a component carrier according to still another embodiment of the present application.
  • 15 is a flow chart of a method of updating a primary component carrier according to an embodiment of the present application.
  • FIG. 16 is a schematic diagram of a handover procedure in the method for updating a primary component carrier
  • 17 is a flow chart of a method of updating a primary component carrier according to another embodiment of the present application.
  • FIG. 18 is a schematic diagram of a reconfiguration process in the method for updating a primary component carrier
  • Figure 19 is a schematic illustration of a variation of the reconfiguration process
  • Figures 20, 21, and 22 are schematic views of a variation of the flow shown in Figures 16, 18, and 19, respectively;
  • Figures 23, 24, and 25 are schematic views of another variation of the flow shown in Figures 16, 18, and 19;
  • 26 is a flow chart of a method of updating a second component carrier according to an embodiment of the present application.
  • FIG. 27 is a schematic diagram of a reconfiguration process in the method for updating a second component carrier;
  • FIG. 28 is a schematic diagram of a modification of the reconfiguration process;
  • 29 is a schematic diagram showing the structure of a base station adapted to update a primary component carrier according to an embodiment of the present application
  • FIG. 30 is a schematic structural diagram of a base station and a corresponding terminal adapted to update a primary component carrier according to another embodiment of the present application;
  • FIG. 31 is a schematic structural diagram of a base station and a corresponding terminal adapted to update a primary component carrier according to still another embodiment of the present application;
  • 32 is a schematic structural diagram of a base station adapted to update a second component carrier according to an embodiment of the present application
  • FIG. 33 is a schematic structural diagram of a base station and a corresponding terminal adapted to update a second component carrier according to another embodiment of the present application. detailed description
  • a carrier available for use by a terminal and a base station in a carrier aggregation communication network is referred to as an available carrier.
  • the carrier that the terminal is already using is called a component carrier, and the component carrier is also a carrier.
  • the component carrier of the terminal operating in the carrier aggregation mode includes a primary component carrier (PCC) and at least one secondary component carrier (SCC).
  • a base station and a terminal can communicate using carriers located in different frequency bands.
  • the coverage of the base station antenna often changes.
  • the present application proposes different component coverage selection strategies for different coverage distribution patterns.
  • a method for selecting a component carrier in a carrier aggregation communication network including: determining a coverage range of each available carrier that the terminal can use (step 102); determining each available carrier Whether the distribution of the coverage conforms to the predetermined distribution pattern (step 104); if the predetermined distribution pattern is met, the component carrier to be used is determined based on at least the criteria determined by the distribution pattern (step 106).
  • the coverage of all available carriers of the base station is known to the base station. Therefore, based on the location of the terminal, it is possible to obtain the coverage of each available carrier that the terminal can use.
  • the terminal can use an available carrier, which means that the terminal is within the coverage of the available carrier.
  • the location of the terminal can be jointly coordinated by a plurality of base stations or determined by the terminal by means of a satellite positioning system such as GPS (Global Positioning System) and provided to the base station.
  • GPS Global Positioning System
  • the present application proposes to adjust the component carrier selection strategy based on the distribution pattern of the coverage.
  • the present application contemplates three possible application scenarios, as shown in Figure 2-4, which can use different component carrier selection strategies in each scenario.
  • the first application scenario that is, the first available carrier coverage distribution pattern is shown in Figure 2.
  • each of the base stations 210, 220, 230 uses two types of carriers F1 and F2, respectively, and the cell coverages corresponding to F1, F2 substantially coincide, and can provide substantially the same coverage area.
  • F1 and F2 may be located in the same carrier frequency band, which is a typical continuous carrier aggregation.
  • the terminal 250 is within the coverage of the cell, it is simultaneously within the coverage of the two carriers F1, F2. Therefore, in this case, if other conditions are not considered, the two carriers F1, F2 have the same status, and any one of the carriers F1 or F2 can be arbitrarily selected as a new component carrier, or another carrier can be selected from among other conditions. .
  • the signal quality, interference size, load status, and the number of physical resources of the uplink and downlink can be used as the basis for selecting the component carrier.
  • the signal quality of the terminal on a certain carrier is high, the received interference is small, the load of the carrier is relatively low, and the more physical resources of the uplink and downlink possessed by the terminal, the carrier is selected.
  • the probability of being a component carrier is relatively large.
  • any order of priority can be set for signal quality, number of physical resources for uplink and downlink, interference size, and load conditions, that is, priority-based settings can be based on any of the above factors.
  • Determine the candidate component carrier may be set for different priority groups, such as signal quality, the number of uplink and downlink physical resources, the priority of the interference size and the load status, or the opposite priority.
  • Order, or set different priority groups that contain different factors or different numbers of factors. That is, based on the priority order setting of the priority group and the priority group, the candidate component carriers can be determined individually based on any set of factors.
  • weights can be set for various factors (which may be the same or different depending on the situation).
  • weight distribution can be set depending on the needs of the actual application. In general, the weight of the signal quality, the amount of physical resources of the uplink and downlink, and the weight of the interference condition and the load condition can be set.
  • each base station 310, 320, 330 uses two carriers F3 and F4, respectively, and the coverage of F4.
  • the coverage of the F3 is greater than and substantially includes the coverage of the F3.
  • the cell corresponding to the F4 mainly guarantees the coverage, and the cell corresponding to the F3 is mainly used to improve the throughput.
  • F3 and F4 may be located in different carrier frequency bands and belong to discontinuous carrier aggregation.
  • one carrier can be selected from among other conditions.
  • the signal quality of each carrier, the interference size, the load status, and the number of physical resources of the uplink and downlink can also be used as the basis for selecting the component carrier.
  • the signal quality of the terminal on a certain carrier is high, the received interference is small, the load of the carrier is relatively low, and the more physical resources of the uplink and downlink possessed by the terminal, the carrier is selected.
  • the probability of the main component carrier is relatively large.
  • any order of priority can be set for available carrier coverage, signal quality, number of physical resources for uplink and downlink, interference size, and load conditions, that is, priority-based settings can be based on the above factors Any one of them determines the candidate component carrier.
  • different factors may be set for the factors, for example, the priority of the coverage is higher than the signal quality, the priority of the physical resources of the uplink and the downlink, the signal quality, the physical resources of the uplink and the downlink.
  • the priority is higher than the priority of the interference size and the load condition, or the opposite priority order is set, or a different priority group containing different factors or different numbers of factors is set. That is, based on the priority order setting of the priority group and the priority group, the candidate component carriers can be determined individually based on any set of factors.
  • weights can be set for various factors (which may be the same or different depending on the situation).
  • weight of the coverage may be set to be higher than the signal quality, the weight of the physical resources of the uplink and the downlink, and the weight of the signal quality, the physical resources of the uplink and the downlink is higher than the interference size and the load condition. Weights.
  • each base station 410, 420, 430 uses two carriers F5 and F6, respectively, for two available carriers.
  • the coverage is basically not overlapping or overlapping, but overlaps with each other.
  • the cell corresponding to F5 mainly guarantees coverage, and the cell corresponding to F6 is mainly used to improve throughput (or vice versa).
  • the feature of the application scenario is that the cell antenna corresponding to the F6 points to the edge region in the cell corresponding to the F5, so that the application scenario can greatly improve the throughput of the F5 cell edge region.
  • F5 and F6 may be located in different carrier frequency bands and belong to non-continuous carrier aggregation.
  • the candidate component carrier can be determined based at least on the location of the terminal and its moving direction and moving rate.
  • Terminal 250 is at the edge of an available carrier F5 and is far away from the available carrier.
  • the probability that the available carrier (here, F6) corresponding to the far direction becomes the candidate component carrier.
  • F6 available carrier
  • candidate component carriers are determined among the plurality of available carriers according to the size of the coverage, that is, similar to the foregoing.
  • fast means that depending on its speed, it is expected that the terminal will soon leave the current carrier coverage, not just a small range of motion. For example, if the end user is only moving around in a small range, he may There is no intention to leave the carrier range (for example, to go to another place), if updating the carrier at this time, it will lead to unnecessary operations. In the specific application, how fast is the "fast”, can be based on the actual application set up.
  • Figure 6 illustrates another terminal location and motion mode, i.e., terminal 250 is located at the edge of a certain available carrier F5 and moves inside the available carrier F5.
  • at least the candidate component carrier is determined according to the size of the coverage of the available carriers F5 and F6, that is, similar to the second application scenario. If the coverage is exactly the same, the selection strategy under the first scenario is applied.
  • Figure 7 illustrates another terminal position and motion pattern, i.e., the position of the terminal 250 away from the edge of the overlapping region in the overlapping region of the available carriers F5 and F6, that is, inside the overlapping region.
  • the candidate component carrier is also determined according to at least the size of the coverage of the available carriers F5 and F6, that is, similar to the second application scenario. If the coverage is exactly the same, then the selection strategy in the first scenario is applied.
  • one carrier can be selected from among other conditions.
  • the signal quality of each carrier can also be used as the basis for selecting the component carrier.
  • PDCCH physical resources of the uplink and downlink
  • any order of priority can be set for the location of the terminal, the direction of terminal movement, the rate of terminal movement, and the available carrier coverage, signal quality, number of physical resources of the uplink and downlink, interference size, and load conditions, that is, Said, based on the priority setting, the candidate component carrier can be determined based on any of the above factors.
  • different factors may be set for the factors, such as the location of the terminal, the direction of movement of the terminal, the moving rate of the terminal, and the available carrier coverage, which are higher than the signal shield, the physical resources of the uplink and downlink.
  • Priority, signal quality, uplink and downlink physical resources have priority over interference size and load conditions, or reverse priority order, or settings with different factors or different numbers of factors Different priority groups. That is, based on the priority order setting of the priority group and the priority group, the candidate component carriers can be determined individually based on any set of factors.
  • weights can be set for various factors (which may be the same or different depending on the situation).
  • the weight of the terminal location, the terminal movement direction, the terminal movement rate, and the available carrier coverage may be set to be higher than the signal quality, the amount of uplink and downlink physical resources, signal quality, uplink, and downlink.
  • the weight of the physical resource quantity of the road is higher than the weight of the interference size and the load condition.
  • the selection of component carriers is described for different application scenarios.
  • various application scenarios may be mixed.
  • the coverage of each available carrier may be completely overlapping (the first application scenario), or there may be an inclusion relationship (second application scenario) or partial overlap (the third application scenario).
  • a selection strategy suitable for different application scenarios is used to select candidate component carriers, and the candidate component carrier range is gradually reduced until it is used.
  • Component carrier That is, on the basis of the first embodiment, when the distribution of the coverage of each available carrier includes at least two predetermined modes, the candidate component carrier is first determined according to the criterion corresponding to one of the modes, and then another The criterion corresponding to the mode determines the second candidate component carrier in the candidate component carrier until a unique candidate is obtained Carrier.
  • step 102 the coverage range of each available carrier that the terminal can use is determined (step 102). It is then determined whether the distribution of the coverage of each available carrier conforms to the predetermined distribution mode (step 104). These two steps have been described in detail in the first embodiment and will not be repeated here.
  • the candidate component carrier may be first determined according to the first criterion corresponding to the first mode (step 808). For example, if the first mode is the foregoing third application scenario, the component carrier selection strategy of the third application scenario is used to determine the candidate component carrier. The determined candidate component carrier may be unique, and the process ends, using the determined candidate component carrier. The identified candidate component carrier may also not be unique. For example, in the third application scenario, if there are multiple available carriers in the direction of motion of the terminal and other factors of the available carriers or factors considered according to the selection strategy are also substantially the same, there may be multiple available carriers available. Candidate component carrier. At this time, it is required to apply a second criterion corresponding to the second mode (for example, a selection policy corresponding to the first or second application scenario) to continue selecting among the plurality of candidate component carriers (step 812), to obtain The component carrier used.
  • a second criterion corresponding to the second mode for example, a selection policy corresponding to the first or second application scenario
  • Figure 8 illustrates only the two distribution modes. Obviously, there may be more kinds of distribution patterns, and the application order of the selection strategies of each distribution pattern may be arbitrary.
  • SCCs secondary component carriers
  • the new primary component carrier may be selected from the second component carrier already in use, or may be selected from available carriers that have not been configured or have been configured but not yet activated.
  • the new second component carrier may be selected from available carriers that have not been configured, or may be selected from available carriers that have been configured but not yet activated.
  • the carrier complexity of different states is different when it is added. Therefore, on the basis of the first embodiment and the second embodiment, when the component carrier is selected, the activation and configuration states of each available carrier may be acquired first, so that the activation and configuration states of each available carrier are also considered when determining the candidate component carrier. Where the available carrier in the active state has a higher priority than the already configured The available carriers that are set but not activated, the available carriers that are configured but not activated have a higher priority than the unconfigured available carriers.
  • the method of selecting a component carrier described in the first to third embodiments can be used to select a principal component carrier.
  • the carrier corresponding to the cell used for the initial access of the terminal, or the carrier used by the terminal to reestablish the connection is naturally the default component carrier. However, as the terminal, base station status, and network environment change, it may be necessary to update the primary component carrier. At this time, the method of selecting the component carrier described in the first to third embodiments may be used to determine a new principal component carrier, and then transfer from the old principal component carrier to the new primary component carrier.
  • the update of the primary component carrier can be performed multiple times.
  • the old primary component carrier is the initial primary component carrier, that is, the terminal is used for initial access or wireless resource connection reestablishment, and the default is Carrier of the primary component carrier.
  • Carrier aggregation may involve different frequency bands. That is to say, the individual carriers available to the terminal may be in the same frequency band or in different frequency bands. Whether the primary component carrier before and after the update is in the same frequency band affects the overhead of the primary component carrier update. Therefore, the update of the primary component carrier can also take into account the frequency relationship between the available carriers.
  • the frequency information of each available carrier may be obtained first, and then the relationship between the frequency of each available carrier and the old primary component carrier is also considered when determining the candidate component carrier, where Among the available carriers with the same activation and configuration status, the available carriers located in the same frequency band as the old primary component carrier have higher priority. Similarly, the meaning of "higher priority" is to have a greater weight, or, in some cases, for example, when other conditions are the same or similar, it plays a decisive role. Fifth embodiment
  • the method of selecting a component carrier described in the first to third embodiments can be used to select a second component carrier.
  • the carrier corresponding to the cell used for the initial access of the terminal, or the carrier used by the terminal to reestablish the connection, is naturally the default component carrier. However, as user service quality requirements increase, it may be necessary to add new carriers to form carrier aggregation.
  • the new second component carrier can be determined by first selecting the component carrier method described in the first to third embodiments, and then the new second component carrier is added.
  • the addition of the second component carrier can be performed in a variety of ways, and various ways exist in the prior art.
  • the applicant also proposes a new second component carrier addition procedure, as described in the following description of various embodiments.
  • the method for selecting a component carrier according to the first to fifth embodiments may be performed by the base station with the assistance of the terminal in the communication system, or may be performed by the terminal with the assistance of the base station.
  • a terminal 920 suitable for a carrier aggregation communication network communicates with the base station 960, determines a component carrier with the assistance of the base station 960, and notifies the base station 960.
  • the terminal includes: a terminal information acquiring unit 902, which acquires terminal location information and/or carrier distribution information corresponding to the terminal location; and a carrier distribution mode determining unit 904, which determines a coverage range of each available carrier corresponding to the location of the terminal. Whether the distribution conforms to the predetermined distribution mode; the component carrier determining unit 906 determines, according to the criterion determined by the distribution mode, that the coverage of each available carrier corresponding to the location of the terminal conforms to the predetermined distribution mode. a component carrier; and a notifying unit 908, notifying the determined base station component to be used by the base station (process (4)).
  • the purpose of the terminal information acquiring unit 902 is to obtain information about the coverage of the carrier available to the terminal, so that the carrier distribution mode determining unit determines the available carrier coverage distribution pattern.
  • the available carrier coverage information needs to be determined based on the location of the terminal and the parameters of the base station carrier.
  • the terminal location can be jointly coordinated by a plurality of base stations 960, or can be determined by the terminal by means of a satellite positioning system 940 such as a GPS (Global Positioning System).
  • the terminal information acquiring unit 902 may include a positioning device built in the terminal to communicate with the satellite positioning system (process (1)), which transmits the terminal location to the base station 960 (process (2) The base station 960 transmits the information of the available carrier coverage to the terminal information acquiring unit 902 based on the terminal location information (process (3)).
  • terminal 902 may also not obtain available carrier coverage information through base station 960. For example, terminal 902 can determine whether it is within the coverage of a certain carrier by detecting the signal strength of each carrier. In this case, process (2) and process (3) are not required in terms of the determination of the available carrier coverage.
  • the base station since the terminal location itself is obtained by the base station, the base station can directly obtain the available carrier coverage information according to the location, so that the terminal information acquiring unit in the terminal can directly obtain from the base station 960.
  • the information (process (3)).
  • the component carrier determining unit 906 uses each available carrier as a candidate component carrier.
  • the component carrier determining unit 906 is based at least according to The size of the coverage is used to determine the candidate component carrier.
  • the terminal information acquiring unit 902 acquires the relevant information.
  • the information of the moving direction and the moving rate of the terminal is described, and the component carrier determining unit 906 is further configured to determine the candidate component carrier according to at least the location of the terminal and its moving direction and moving rate.
  • the direction of movement and the rate of movement of the terminal are determined based on the position of the terminal at different times.
  • the terminal location can be determined by the built-in satellite positioning device or by the base station 960.
  • the terminal moving direction and the moving rate can be calculated by the terminal information acquiring unit based on the position information acquired from the satellite positioning device or the base station 960.
  • the base station 960 can provide the location information of the terminal to the terminal information acquisition unit through the process (3) (of course, by another process).
  • the base station 960 calculates the location of the terminal
  • the calculation of the direction of movement and the rate of movement of the terminal can of course also be performed by the base station.
  • the base station 960 only needs to directly provide the location information of the terminal, its moving direction and the moving rate information to the terminal information acquiring unit through the process (3) (of course, through another process).
  • the component carrier determining unit 906 can be further configured to: if the information acquired by the terminal information acquiring unit 902 indicates that the terminal is located at an available carrier edge and is rapidly moving away from the available carrier, assigning a direction corresponding to the far direction The probability that the available carrier is higher becomes the candidate component carrier; if the information acquired by the terminal information acquiring unit 902 indicates that the terminal is located at the edge of a certain available carrier and moves toward the available carrier, or if the terminal is away from the edge of the overlapping region in the overlapping region The location of the candidate component carrier is determined based on at least the size of the coverage.
  • the component carrier determining unit 906 may be further configured to: if there are multiple available carriers corresponding to the far direction, determine a candidate component carrier among the plurality of available carriers according to at least a size of the coverage.
  • the component carrier determining unit 906 can be further configured to determine candidate component carriers based at least on at least one of: signal quality, physical resources of the uplink and downlink, interference magnitude, and load conditions.
  • the signal quality is information that the terminal itself can obtain according to the conventional technology
  • the interference of other base stations, carriers or terminals to the current terminal is also information that can be obtained based on the signal quality according to the conventional technology.
  • the amount of physical resources and load conditions of the uplink and downlink it is based on information that can be obtained from the base station by conventional techniques (see the procedure (5) in Fig. 10).
  • the related information also needs to be obtained from the base station (the base station obtains information from the reports of other terminals).
  • the component carrier determining unit 906 may be further configured to: when determining the candidate component carrier, the coverage, the location of the terminal, and the direction of movement and the rate of movement are more important than signal quality, uplink and downlink
  • the candidate component carrier is determined individually or collectively by any one or more of the signal quality, the number of physical resources of the uplink and downlink, the interference size, and the load condition.
  • the component carrier determining unit 906 may be further configured to: when the distribution of the coverage of each available carrier includes at least two predetermined modes, first determine a candidate component carrier according to a criterion corresponding to one of the modes, and then According to the criterion corresponding to another mode, the candidate component The second candidate component carrier is determined in the wave until a unique candidate component carrier is obtained.
  • the terminal may further include a carrier state acquiring unit 910 (FIG. 11), which acquires an activation and configuration state of each available carrier.
  • the component carrier determining unit 906 may be further configured to: consider, when determining the candidate component carrier, an activation and configuration state of each available carrier, where the available carrier in the active state has a higher priority than the configured but not activated. Available carriers, the available carriers that are configured but not activated have a higher priority than the unconfigured available carriers.
  • FIG. 11 does not have the process (5) in FIG. 10, but it can be known from the above description that in another variation, the process in FIG. 10 (5) is also possible. ).
  • the component carrier determined by the terminal in this embodiment may be a primary component carrier or a second component carrier.
  • the component carrier determining unit 906 can be further configured to further consider the relationship between the frequency of each available carrier and the old primary component carrier when determining the candidate component carrier, where Among the available carriers with the same configuration state, the available carriers located in the same frequency band as the old primary component carrier have higher priority.
  • the above description of the present embodiment discloses a terminal that interacts with a base station. Obviously, this also discloses a communication system composed of the above terminal and the base station with which it communicates.
  • the sixth embodiment describes a terminal that implements the method of selecting component carriers described in the first to fifth embodiments.
  • the seventh embodiment will describe a base station implementing the method of selecting component carriers described in the first to fifth embodiments.
  • a base station 1220 in a carrier aggregation communication network communicates with a terminal 1260, determines a component carrier with the assistance of the terminal 1260, and notifies the terminal 1260.
  • the base station includes: a terminal information acquiring unit 1202, acquiring terminal location information and/or carrier distribution information corresponding to the terminal location; and a carrier distribution mode determining unit 1204, determining a coverage range of each available carrier corresponding to the location of the terminal.
  • the component carrier determining unit 1206 determines, at least according to the criterion determined by the distribution mode, that the coverage of each available carrier corresponding to the location of the terminal conforms to the predetermined distribution mode Make The component carrier used; and the notifying unit 1208 notifying the determined component carrier to be used to the terminal (process (4)).
  • the purpose of the terminal information acquiring unit 1202 is to obtain information of the coverage of the carrier available to the terminal, so that the carrier distribution mode determining unit determines the available carrier coverage distribution mode.
  • the available carrier coverage information needs to be determined based on the location of the terminal and the parameters of the base station carrier.
  • the terminal location can be measured either by the base station 1220 itself or by the terminal 1260 by means of a satellite positioning system 940 such as GPS (Global Positioning System) (Process (1)).
  • GPS Global Positioning System
  • the terminal information acquiring unit 1202 may acquire the positioning information of the terminal built-in positioning device from the terminal 1260 (process (2)), thereby further obtaining the carrier available to the terminal based on the available carrier information of the base station. Coverage information.
  • the base station can directly obtain available carrier coverage information according to the location.
  • the component carrier determining unit 1206 uses each available carrier as a candidate component carrier.
  • the component carrier determining unit 1206 is based at least according to The size of the coverage is used to determine the candidate component carrier.
  • the terminal information acquiring unit 1202 acquires the relevant information.
  • the information of the moving direction and the moving rate of the terminal is described, and the component carrier determining unit 1206 is further configured to determine the candidate component carrier according to at least the location of the terminal and its moving direction and moving rate.
  • the direction of movement and the rate of movement of the terminal are determined based on the location of the terminal at different times.
  • the location of the terminal can be determined by the satellite positioning device built into the terminal or by the base station 1220.
  • the terminal moving direction and the moving rate can be calculated by the terminal information acquiring unit based on the position information acquired from the terminal 1260 or the terminal position calculated by the base station.
  • the terminal 1260 obtains the location of the terminal through the satellite positioning device, the calculation of the moving direction and the moving rate of the terminal can of course be completed by the terminal itself. At this time, the terminal 1260 only needs to obtain the terminal information through the process (2) (of course, through other processes).
  • the unit directly provides the location information of the terminal and its moving direction and moving rate information.
  • the component carrier determining unit 1206 can be further configured to: if the information acquired by the terminal information acquiring unit 1202 indicates that the terminal is located at an available carrier edge and is rapidly moving away from the available carrier, assigning a direction corresponding to the far direction The probability that the available carrier is higher becomes the candidate component carrier; if the information acquired by the terminal information acquiring unit 1202 indicates that the terminal is located at the edge of a certain available carrier and moves toward the available carrier, or if the terminal is away from the edge of the overlapping region in the overlapping region The location of the candidate component carrier is determined based on at least the size of the coverage.
  • the component carrier determining unit 1206 may be further configured to: if there are multiple available carriers corresponding to the far direction, determine a candidate component carrier among the plurality of available carriers according to at least a size of the coverage.
  • the component carrier determining unit 1206 may be further configured to determine candidate component carriers based at least on at least one of: signal quality, physical resources of the uplink and downlink, interference magnitude, and load conditions.
  • the signal quality is information that the terminal itself can obtain according to the conventional technology
  • the interference of other base stations, carriers or terminals to the current terminal is also information that can be obtained by the terminal based on the signal quality according to the conventional technology.
  • the physical resource quantity and load status of the uplink and downlink the information that the conventional technology can grasp by the base station itself is used.
  • the related information is also obtained by the base station based on the information reported by other terminals. Therefore, the component carrier determining unit 1206 acquires relevant information from the terminal 1260 as necessary (see the process (5) in Fig. 13)
  • the component carrier determining unit 1206 may be further configured to: when determining a candidate component carrier, the coverage, the location of the terminal, and the direction of movement and the rate of movement are more important than signal quality, uplink and downlink
  • the candidate component carrier is determined individually or collectively by any one or more of signal quality, number of physical resources of the uplink and downlink, interference size, and load conditions.
  • the component carrier determining unit 1206 may be further configured to: when the distribution of the coverage of each available carrier includes at least two predetermined modes, determine the candidate component carrier according to the criterion corresponding to one of the modes, and then The second candidate component carrier is determined in the candidate component carrier according to a criterion corresponding to another mode until a unique candidate component carrier is obtained.
  • the base station may further include a carrier state acquiring unit 1210, and acquire an activation and configuration state of each available carrier.
  • the component carrier determining unit 1206 may be further configured to: consider, when determining the candidate component carrier, an activation and configuration state of each available carrier, wherein the available carrier in the active state has a higher priority than the configured but not activated. Available carriers, the available carriers that are configured but not activated have a higher priority than the unconfigured available carriers.
  • the activation and configuration state of the available carrier is the state of the terminal itself, the base station of the present embodiment needs to pass the process.
  • FIG. 14 does not have the process (5) in FIG. 13, but it can be understood from the above description that in another variation, the process in FIG. 13 (5) ).
  • the component carrier determined by the base station in this embodiment may be a primary component carrier or a second component carrier.
  • the component carrier determining unit 1206 can be further configured to further consider the relationship between the frequency of each available carrier and the old primary component carrier when determining the candidate component carrier, where Among the available carriers with the same configuration state, the available carriers located in the same frequency band as the old primary component carrier have higher priority.
  • the above embodiments describe how to select a component carrier, including a primary component carrier and a second component carrier.
  • the appropriate process is used to switch from the old primary component carrier to the selected new primary component carrier, or to add the selected new second component carrier, or to use the
  • the selected new second component carrier replaces an old second component carrier (actually a combination of add action and delete action).
  • a method for updating a primary component carrier in a carrier aggregation communication network including: acquiring state information of a terminal, a base station, and/or a primary component carrier (Ste 1502); determining whether the status information meets a predetermined condition (step 1504); replacing the old primary component carrier with the new primary component carrier if the predetermined condition is met (step 1506).
  • the conditions under which the principal component carrier is considered to be evaluated may include at least one of the following conditions:
  • the original base station needs to update the main component carrier for consideration of the overall load balancing of the network and interference between users;
  • the update of the primary component carrier can use the handover procedure or the reconfiguration process.
  • the base station to which the old primary component carrier belongs sends "RRC Resource Management” (RRC) reconfiguration information to the terminal, and the "Radio Resource Control” reconfiguration information includes mobility control.
  • Information MobilityControlInfo
  • the mobility control information includes radio resource configuration information (RadioResourceConfig) of the new primary component carrier.
  • the terminal then reconfigures the MAC (Media Access Control), PDCP (Packet Data Convergence Protocol), and RLC (Radio Link Control) layers by using the mobile control information in the "Radio Resource Control" reconfiguration information, updating the security key, and
  • the new primary component carrier is configured by using the radio resource configuration information of the new primary component carrier.
  • the random access procedure may be initiated by the terminal or by the base station.
  • the terminal proposes an access request, and the process in which the new primary component carrier belongs to the base station according to the resource and other terminal access request conditions is competitive, that is, the random access is each terminal.
  • the process of preempting resources When a random access is unsuccessful, it needs to be retried depending on the situation, or it may need to reconfigure the unlimited resource configuration information, or need to switch again.
  • the random access procedure is initiated by the base station to which the new primary component carrier belongs, the base station has reserved the corresponding resources for the terminal in advance, so the terminal can respond unless the situation on the terminal side changes.
  • the old primary component carrier can be deactivated. Deactivation can be done in two ways. One is that the base station to which the new primary component carrier belongs directly sends a deactivation command to the terminal (as shown in FIG. 16), and the terminal deactivates the old primary component carrier after receiving the deactivation command. Another way is to deactivate the old primary component carrier using implicit deactivation (not shown in Figure 16), ie the terminal does not need to receive a deactivation command from the base station, but instead deactivates the old primary component carrier. Such an automatic action may be, for example, based on a timer, that is, the system pre-defines the deactivation time of the old primary component carrier, or pre-defines the trigger condition of the deactivation timer.
  • the update of the primary component carrier can also use the reconfiguration process.
  • the reconfiguration process may have no random access procedure and a process of updating a key compared to the handover procedure.
  • the content of the RRC reconfiguration information is also simplified, including the mobile control information and only the radio resource configuration information of the new primary component carrier. Therefore, after receiving the RRC reconfiguration information, the terminal only needs to configure the new primary component carrier without reconfiguring the MAC, PDCP, RLC layer and updating the security key, thereby reducing the update of the primary component carrier. Additional system overhead, avoiding the problem of reduced user service shields caused by updating the primary component carrier.
  • all relevant configuration information including the new primary component carrier (for example, does not include the mobility control information) is not required in the RRC message body, but only the configuration information that is updated compared with the original primary component carrier, that is, the radio resource configuration information is needed. That is, it can be called incremental signaling.
  • the present application continues to propose a process for determining an update according to an updated scenario. If the primary component carriers before and after the update belong to the same base station, the primary component carrier is updated by the reconfiguration process. If the primary component carriers before and after the update do not belong to the same base station, the primary component carrier is updated by the handover procedure.
  • the process of updating the primary component carrier includes: determining a new primary Whether the component carrier belongs to the same base station as the old primary component carrier (step 1702); if it belongs to the same base station, the base station uses the reconfiguration process to replace the old primary component carrier with the new primary component carrier (step 1704); The base station to which the primary component carrier belongs sends a handover request to the base station to which the new primary component carrier belongs, acquires relevant information from the base station to which the new primary component carrier belongs (step 1704), and then replaces the old primary component carrier with the new primary component carrier by using the handover procedure. (Step 1706).
  • step 1704 the base station to which the old primary component carrier belongs (hereinafter referred to as the old base station) sends a handover request to the new primary component carrier (hereinafter simply referred to as a new base station), so that the new base station is prepared.
  • the reconfiguration flow 1704 and the handover procedure 1706 in this embodiment are the same as the reconfiguration flow and handover procedure described above in connection with Figs. 16 and 18.
  • the difference is that, since the new primary component carrier and the old primary component carrier do not belong to the same base station, although the RRC reconfiguration information is still sent by the old base station, the random access procedure after the configuration is completed is Interaction between new base stations (see description below in conjunction with Figure 31).
  • the response (or acknowledgment) message after the terminal completes the configuration it is also sent directly to the new base station.
  • the new primary component carrier and the old primary component carrier should generally be in the same frequency band, have the same timing advance, and are all synchronized with the base station. If such a condition is not met, then as shown in Figure 19, random access to the new primary component carrier is initiated before the old primary component carrier is deactivated.
  • the implicit premise is that the new primary component carrier has been initially configured and activated.
  • new main component carriers that have not been initially matched. Set, or a scene that has been initially configured but has not yet been activated.
  • the activation process may be deactivated after the configuration is completed or the random access procedure, or the old primary component carrier is deactivated (the base station issues a deactivation command as shown). However, as described above, the deactivation process may also be an activation command issued by the base station before the terminal itself implicitly deactivates. Alternatively, as shown in Figures 23-25 corresponding to Figures 16, 18, 19, the activation process may also send an activation command by the base station prior to issuing the RRC reconfiguration information.
  • the activation command can be combined with other commands or sent simultaneously.
  • the two processes of initial configuration and activation can be combined to define a new "configuration activation" process that completes both configuration and activation, ie the base station issues "configuration activation".
  • the terminal completes configuration and activation once it receives the command.
  • the activation command can also be sent simultaneously with the "Radio Resource Control" reconfiguration information.
  • the initial configuration process and the subsequent switching process or reconfiguration process can be combined and included in one command without separation. This means that the initial configuration command can be merged with the RRC reconfiguration information.
  • updating the second component carrier includes adding the selected new second component carrier or replacing the old second component carrier with the selected new second component carrier.
  • the latter case is actually a combination of adding actions and deleting actions.
  • the present embodiment proposes a method of updating the second component carrier.
  • the method of this embodiment includes: acquiring state information of a terminal, a base station, and/or a second component carrier (step 2202); determining whether the state information meets a predetermined condition (step 2204); A new second component carrier is added if the predetermined condition is met or the old second component carrier is replaced with a new second component carrier (step 2206).
  • the conditions under consideration for performing the update of the second component carrier may include at least one of the following conditions:
  • the original base station needs to update the second component carrier for consideration of the overall load balancing of the network and interference between users;
  • the update of the second component carrier uses a reconfiguration process.
  • This reconfiguration procedure is similar to the reconfiguration procedure for the primary component carrier described in connection with FIG. However, the difference is that since the second component carrier is not unique, the update of the second component carrier is as described above by adding a new second component carrier, so the reconfiguration process used for the second component carrier update is not Need to include the deactivation process.
  • the base station sends “RRC Resource Management” (RRC) reconfiguration information to the terminal, where the “Radio Resource Control” reconfiguration information includes only the new second component.
  • Radio resource configuration information of the carrier RadioResourceConfig.
  • the terminal uses the radio resource configuration information of the new primary component carrier to configure a new second component carrier. Since there is no need to reconfigure the MAC, PDCP, and RLC layers and update the security key, the additional system overhead due to the second component carrier update can be reduced, thereby avoiding the problem of degrading user service quality.
  • all relevant configuration information including the new second component carrier (for example, does not include the mobile control information) is not required in the RRC message body, but only the radio resource configuration information corresponding to the second component carrier is needed, and Call it incremental signaling.
  • the carrier that has not been initially configured as the new second component carrier or the carrier that has been initially configured but not yet activated is also activated (Fig. 27, 28).
  • the reconfiguration described in this application is completed, that is, its initial configuration (ie, the addition of the carrier) is completed.
  • the activation process it is also flexible in chronological order.
  • the activation process may issue an activation command by the base station after the configuration based on the RRC reconfiguration information is completed.
  • the activation process may also send an activation command by the base station before issuing the RRC reconfiguration information.
  • an activation command can be combined with other commands or sent simultaneously.
  • an activation command can be sent simultaneously with the "Radio Resource Control" reconfiguration information.
  • the method of updating a component carrier described in the eighth to tenth embodiments is performed cooperatively by a base station and a terminal in a communication system.
  • a terminal, a base station, and a communication system capable of realizing the various embodiments described above, respectively, have been proposed.
  • the base station 2420 in a carrier aggregation communication network communicates with the terminal 2520 to complete the update of the primary component carrier.
  • the terminal includes: a state acquiring unit 2402, acquiring state information of the terminal, the base station, and/or the primary component carrier; a state determining unit 2404, determining whether the state information meets a predetermined condition; and a principal component carrier updating unit 2406, The old primary component carrier is replaced with a new primary component carrier if the predetermined conditions are met.
  • the state obtaining unit 2402 is information for obtaining the state component determining unit 2404 to determine whether or not the main component carrier update condition is satisfied. What information needs to be obtained depends on the update condition, and the update condition can be arbitrarily set according to the specific application.
  • the predetermined condition includes at least one of the following conditions:
  • the original base station considers the problem of the overall load balancing of the network and inter-user interference, etc., and requires updating the primary component carrier;
  • the coverage of the component carrier is judged.
  • the signal quality information needs to be obtained from the terminal.
  • the third condition information needs to be obtained from the base station.
  • the fourth condition is entirely a command from the base station.
  • the state obtaining unit 2402 may only need to acquire relevant information from the base station itself without interacting with the terminal 2520, and may also need to interact with the terminal 2520 to obtain related information.
  • the specific acquisition method of the information it has been described in the foregoing description of the selection of the component carrier, and will not be repeated here.
  • the primary component carrier update unit 2406 interacts with the terminal 2502 to complete the update of the primary component carrier. As mentioned earlier, all primary component carrier updates can be done through the handover process. Therefore, in an embodiment, as shown in FIG. 30, the primary component carrier update unit 2406 may include: a reconfiguration information sending unit 24062, configured to send “radio resource control” reconfiguration information to the terminal, where the “radio resource” Controlling "reconfiguration information" includes mobility control information including information for reconfiguring the MAC, PDCP and RLC layers by the terminal, updating the security key, and radio resources used by the terminal to configure the new primary component carrier Configuration information; and a random access unit 24064 for initiating non-contention random access or responding to a random access request of the terminal.
  • a reconfiguration information sending unit 24062 configured to send “radio resource control” reconfiguration information to the terminal, where the “radio resource” Controlling "reconfiguration information” includes mobility control information including information for reconfiguring the MAC, PDCP and RLC layers by the terminal, updating the
  • the handover procedure includes deactivation of the old primary component carrier, but may be either deactivated by the base station or implicitly deactivated by the terminal itself.
  • the primary component carrier update unit 2406 may further include a deactivation command transmitting unit 24066 for deactivating the old primary component carrier, as shown in FIG.
  • the primary component carrier update unit 2406 may not include the deactivation command transmitting unit 24066.
  • the embodiment further provides a corresponding terminal 2520.
  • the method includes: a reconfiguration information receiving unit 2502, configured to receive “radio resource control” reconfiguration information from the base station;
  • the configuration unit 2504 is configured to reconfigure the MAC, PDCP, and RLC layers according to the “radio resource control” reconfiguration information, and update the information of the security key;
  • the radio resource configuration unit 2506 is configured to The radio resource control "reconfigures the radio resource configuration information included in the reconfiguration information to configure a new primary component carrier;
  • the random access unit 2510 is configured to initiate a competitive random access or a non-contention random access initiated by the base station.
  • the deactivation unit 2508 is configured to deactivate the old primary component carrier according to a preset or according to a deactivation command sent by the base station.
  • the above base station 2420 and terminal 2520 are adapted to complete the handover procedure.
  • the reconfiguration information transmitting unit 24062 is configured to transmit to the terminal the "radio resource control" reconfiguration information including only the wireless of the new primary component carrier.
  • the resource configuration information is used by the terminal 2520 to configure a new primary component carrier. Accordingly, the function of the mobility control configuration unit 2504 is not required in the terminal 2520.
  • the reconfiguration process generally does not have a random access procedure. Therefore, in the above base station 2420 and terminal 2520, which are suitable for completing the reconfiguration process, there may be no random access unit. However, as previously mentioned, the base station 2420 and the terminal 2520 may each include a corresponding random access unit to deactivate the old primary component carrier when the new primary component carrier and the old primary component carrier do not meet the following conditions. Randomly access the new primary component carrier before. These conditions are: The old and new primary component carriers are in the same frequency band, have the same timing advance, and are all synchronized with the base station.
  • the preferred manner is to appropriately select the handover process or the reconfiguration process according to the application scenario, so that the base station and the terminal preferably have the process switching process and the reconfiguration process respectively.
  • the switching process uses all of the illustrated components of the terminal 2520 shown in Figure 30, and the reconfiguration process uses only some of the components. Therefore, it can be considered that the terminal capable of implementing the handover process can also implement the reconfiguration process.
  • the state determining unit 2404 may be further configured to: determine whether the new primary component carrier is based on the information acquired by the state acquiring unit 2402 It belongs to the same base station as the old primary component carrier. Of course, the determination can also be made by any component in the base station 2420, and the result is communicated to the primary component carrier update unit 2406.
  • the base station itself knows the current primary component carrier of the terminal, and in the process of selecting the primary carrier, either the base station decides a new primary component carrier, or the terminal decides a new primary component carrier and informs the base station (for example, The base station issues a request to update the primary component carrier), so the base station can determine whether the old and new primary component carriers belong to the same base station based on the above information. Since the terminal necessarily requests to update the primary component carrier to the current base station (i.e., the base station to which the old primary component carrier belongs), the above judgment of the base station is to determine whether the new primary component carrier is the carrier of the base station itself.
  • the reconfiguration information transmitting unit 24062 can be configured to transmit different configuration information in different situations. That is, in a case where the new primary component carrier and the old primary component carrier belong to the same base station, the "radio resource control" reconfiguration information transmitted to the terminal includes only the radio resource configuration information of the new primary component carrier, The new primary component carrier is configured by the terminal; in the case that the new primary component carrier and the old primary component carrier do not belong to the same base station, the "radio resource control" reconfiguration information includes mobile control information, and the mobile control The information includes information for reconfiguring the MAC, PDCP and RLC layers by the terminal, updating the security key, And radio resource configuration information used by the terminal to configure a new primary component carrier.
  • the random access unit 2510 of the terminal 2520 and the random access unit 2404 of the new base station 2420 instead of interacting with the random access unit 2404 in the old base station 2420, as shown in FIG.
  • the random access unit 24064 of the new base station 2420, and the random access unit 24064 of the old base station 2420 may be the same component, but belong to different base station entities; they may also be different components. Even the old base station 2420 and the new base station 2420 are not necessarily identical.
  • the old base station 2420 and the new base station 2420 should have the same configuration, and only some of the components of the new base station 2420 are illustrated in Fig. 31 for the sake of simplicity.
  • the case of the deactivation unit referred to below is similar.
  • the base station needs to use the deactivation command to send the unit. Similar to the case of a random access unit, in the case where the old and new primary component carriers belong to different base stations and the handover procedure is used, the deactivation command should be issued by the new base station 2420, that is, the deactivation command by the new base station 2420.
  • the sending unit 24066 interacts with the deactivation unit 2508 of the terminal 2520, as shown in FIG.
  • the base station may further include a handover requesting unit 3102, configured to send a handover request to the base station to which the new primary component carrier belongs if the new primary component carrier and the old primary component carrier do not belong to the same base station, from the new primary
  • the base station to which the component carrier belongs acquires relevant information to prepare RRC reconfiguration information to be transmitted to the terminal by the reconfiguration information transmitting unit. The details are described in the method section and will not be repeated here.
  • the primary component carrier update unit may further include an activation command sending unit (not shown) for transmitting the reconfiguration information if the new primary component carrier has not been initially configured or activated.
  • the unit sends an activation command to activate the new primary component carrier before transmitting the "radio resource control" reconfiguration information, at the same time, or after the terminal configures using the "radio resource control" reconfiguration information.
  • the base station may further include an initial configuration unit (not shown) for transmitting a command to initially configure (add) the primary component carrier to the terminal if the new primary component carrier has not been initially configured.
  • the terminal may further include a primary component carrier activation unit (not shown) for receiving an activation command sent by the base station to activate a new primary component carrier. And may further include: an initial configuration unit (not shown) for adding the primary component carrier in response to a command from the base station.
  • the method of updating a component carrier according to the eleventh embodiment is performed cooperatively by a base station and a terminal in a communication system.
  • a terminal, a base station, and a communication system capable of realizing the various embodiments described above, respectively, have been proposed.
  • the base station 3000 in a carrier aggregation communication network communicates with the terminal 3020 to complete the update of the second component carrier.
  • the terminal includes: a state acquiring unit 3002, acquiring state information of the terminal, the base station, and/or the second component carrier; a state determining unit 3004, determining whether the state information meets a predetermined condition; and a second component carrier updating unit 3006. Add a new second component carrier or replace the old second component carrier with a new second component carrier if the predetermined condition is met.
  • the state obtaining unit 3002 is information for obtaining the state determining unit 3004 to determine whether the second component carrier update condition is satisfied. What information needs to be obtained depends on the update condition, and the update condition can be arbitrarily set according to the specific application.
  • the predetermined condition includes at least one of the following conditions:
  • the original base station considers the problem of the overall load balancing of the network and the interference between users, and requires updating the second component carrier;
  • the first and fifth conditions are It is completely a command from the base station.
  • the state obtaining unit 3002 may only need to acquire relevant information from the base station itself without interacting with the terminal 3020, and may also need to interact with the terminal 3020 to obtain related information.
  • the specific acquisition method of the information it has been described in the foregoing description of the selection of the component carrier, and will not be repeated here.
  • the second component carrier update unit 3006 interacts with the terminal 3002 to complete the update of the second component carrier.
  • the second component carrier update unit 3006 may include: a reconfiguration information sending unit 30062, and send “radio resource control” reconfiguration information to the terminal, where the “radio resource control”
  • the "reconfiguration information” includes only the radio resource configuration information of the new second component carrier for configuring the new second component carrier by the terminal.
  • the embodiment further provides a corresponding terminal 3020.
  • the method includes: a reconfiguration information receiving unit 3022, configured to receive “radio resource control” reconfiguration information from the base station;
  • the configuration unit 3024 is configured to configure a new second component carrier according to the radio resource configuration information included in the “radio resource control” reconfiguration information.
  • the second component carrier update unit may further include an activation command sending unit 30066, configured to send after adding a new second component carrier or replacing the old second component carrier with a new second component carrier.
  • the terminal may further include a second component carrier activation unit 3028, configured to receive an activation command sent by the base station, and activate the second component carrier.
  • a second component carrier activation unit 3028 configured to receive an activation command sent by the base station, and activate the second component carrier.
  • the object of the present invention can also be achieved by running a program or a group of programs on any information processing device.
  • the information processing device may be a well-known general-purpose device.
  • the object of the present invention can also be achieved by merely providing a program product comprising program code for implementing the method or device. That is to say, such a program product also constitutes the present invention, and a storage medium in which such a program product is stored also constitutes the present invention.
  • the storage medium may be any type of storage shield known to those skilled in the art or developed in the future, including but not limited to floppy disks, optical disks, magneto-optical disks, memory cards, memory sticks and the like.
  • steps of performing the series of processes described above may naturally be performed in chronological order in the order illustrated, but need not necessarily be performed in chronological order. Some steps can be performed in parallel or independently of each other.

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Description

选择成份载波的方法、 基站、 终端和通信系统
技术领域
[01] 本申请总体上涉及无线通信领域，尤其是载波汇聚通信领域。更为具 体地，本申请涉及在载波汇聚通信网络中选择成份载波的方法， 以及更新 成份载波的方法。本申请还涉及适于实施所述方法的设备， 包括基站和终 端， 以及包括所述基站和终端的通信系统。
背景技术
[02] 未来的 LTE-A ( Long Term Evolution-Advanced, 高级长期演进） 系 统将支持高达 100MHz的传输带宽， 而在 LTE ( Long Term Evolution, 长期演进）标准中可支持的最大传输带宽为 20MHz， 因此需要将多个载 波进行汇聚以实现更高的传输带宽。 载波汇聚（ Carrier Aggregation )就 是 3GPP (第三代合伙伙伴计划）为了支持未来的移动通信系统更高的传 输带宽需求而提出的将多个载波聚合进行联合传输的技术。根据所汇聚载 波在频谱上的位置， 可以分为连续载波汇聚和非连续载波汇聚， LTE-A 将同时支持这两种汇聚场景。 3GPP在引入载波汇聚技术的同时也考虑到 了后向兼容性，这意味着在未来很长的一段时间内， 支持载波汇聚和不支 持载波汇聚的终端将长期共存，支持载波汇聚的终端能够同时接入多个载 波， 而不支持载波汇聚的终端仅能接入某一个载波。
[03] 为了简化载波汇聚场景下的无线资源管理， 在 LTE-A中将引入主成 份载波（PCC， primary component carrier )的 f既念。 因 Al , 对于载波汇 聚下的载波管理，将由分布式管理向集中式管理的方向发展。 因此主成份 载波必将具备普通载波所没有的功能， 在无线资源管理中承担重要作用。
[04] 用于终端初始接入的小区所对应的载波自然地被选为主成份载波，然 而随着用户服务质量需求的提高， 可能需要增加新的载波形成载波汇聚。 随着终端、基站和网络情况的变化，还有可能替换或者删除某些使用中的 载波。 由于用户的移动以及所汇聚的载波性能的不同，可能需要对主成份 载波进行重新指定。 发明内容
[05] 在下文中给出了关于本发明的简要概述，以便提供关于本发明的某些 方面的基本理解。 应当理解， 这个概述并不是关于本发明的穷举性概述。 它并不是意图确定本发明的关键或重要部分，也不是意图限定本发明的范 围。其目的仅仅是以简化的形式给出某些概念， 以此作为稍后论述的更详 细描述的前序。
[06] 本申请的一个目的是提供一种选择成份载波的方法和设备，包括基站 和终端。 本申请的进一步目的是提供一种更新主成份载波的方法和设备， 包括基站和终端，以及添加第二成份载波的方法和设备，包括基站和终端。 以及包括所述基站和终端的通信系统。
[07] 因此， 根据本申请的第一方面， 提供了一种在载波汇聚通信网络中 选择成份载波的方法，包括：确定终端能够使用的各可用载波的覆盖范围； 确定各可用载波的覆盖范围的分布是否符合预定分布模式；在符合所述预 定分布模式的情况下，至少根据所述分布模式所决定的准则确定要使用的 成份载波。
[08] 根据本申请的另一方面，提供了一种在载波汇聚通信网络中更新主成 份载波的方法， 包括： 使用上述第一方面的方法确定新的主成份载波； 以 及从旧的主成份载波转到新的主成份载波。
[09] 根据本申请的另一方面，提供了一种在载波汇聚通信网络中添加第二 成份载波的方法， 包括： 使用上述第一方面所述的方法确定新的第二成份 载波； 并添加所述新的第二成份载波。
[10] 根据本申请的又一方面，提供了一种载波汇聚通信网络中的设备， 包 括： 终端信息获取单元， 获取终端位置信息和 /或终端位置对应的载波分 布信息； 载波分布模式确定单元，确定终端所在位置所对应的各可用载波 的覆盖范围的分布是否符合预定分布模式； 成份载波确定单元，在终端所 在位置所对应的各可用载波的覆盖范围符合所述预定分布模式的情况下， 至少根据所述分布模式所决定的准则确定要使用的成份载波；以及通知单 元， 将所确定的要使用的成份载波通知给对方设备。
[11] 其中， 所述成份载波可以为主成份载波， 也可以为第二成份载波。
[12] 上述设备可以是基站，其中，所述对方设备为与所述基站通信的终端。
[13] 上述设备也可以是终端，其中， 所述对方设备为与所述终端通信的基 站。 [14] 根据本申请的再一方面， 还提供了包括上述基站和 /或终端的通信系 统。
[15] 根据上述各实施方案， 能够合理地选择要使用的成份载波。
[16] 本申请的另一个目的是提供一种更新主成份载波的方法，以及相应的 基站和终端， 以及通信系统。
[17] 因此， 才艮据本申请的一个方面， 提供了一种在载波汇聚通信网络中 更新主成份载波的方法， 包括： 获取终端、 基站和 /或主成份载波的状态 信息； 确定所述状态信息是否符合预定条件； 在符合预定条件的情况下用 新的主成份载波代替旧的主成份载波。
[18] 根据本申请的另一方面，提供了一种载波汇聚通信网络中的基站， 包 括： 状态获取单元， 获取终端、 基站和 /或主成份载波的状态信息； 状态 确定单元，确定所述状态信息是否符合预定条件； 以及主成份载波更新单 元， 在符合预定条件的情况下用新的主成份载波代替旧的主成份载波。
[19] 根据本申请的再一方面， 提供了一种适于载波汇聚通信网络的终端， 包括： 重配置信息接收单元， 用于从基站接收 "无线资源控制" 重配置信 息； 无线资源配置单元， 用于才艮据所述 "无线资源控制" 重配置信息中所 包含的无线资源配置信息来配置新的主成份载波； 以及去激活单元，用于 按照预先设定或者根据基站发送的去激活命令将旧的主成份载波去激活。
[20] 根据本申请的再一方面， 还提供了包括上述基站和终端的通信系统。
[21] 本申请的再一个目的是提供一种更新第二成份载波的方法和设备，以 及相应的基站、 终端和通信系统。
[22] 因此， 才艮据本申请的一个方面， 提供了一种在载波汇聚通信网络中 更新第二成份载波的方法， 包括： 获取终端、 基站和 /或第二成份载波的 状态信息； 确定所述状态信息是否符合预定条件； 在符合预定条件的情况 下添加新的第二成份载波或者用新的第二成份载波代替旧的第二成份载 波。
[23] 根据本申请的另一方面，提供了一种载波汇聚通信网络中的基站， 包 括： 状态获取单元， 获取终端、 基站和 /或第二成份载波的状态信息； 状 态确定单元，确定所述状态信息是否符合预定条件； 以及第二成份载波更 新单元，在符合预定条件的情况下添加新的第二成份载波或者用新的第二 成份载波代替旧的第二成份载波。 [24] 根据本申请的另一方面， 提供了一种适于载波汇聚通信网络的终端， 包括： 重配置信息接收单元， 用于从基站接收 "无线资源控制" 重配置信 息； 以及无线资源配置单元， 用于才艮据所述 "无线资源控制" 重配置信息 中所包含的无线资源配置信息来配置新的第二成份载波。
[25] 根据本申请的再一方面， 还提供了包括上述基站和终端的通信系统。
[26] 根据上述各实施方案， 能够高效地更新要使用的成份载波。
附图说明
[27] 参照下面结合附图对本发明实施例的说明，会更加容易地理解本发明 的以上和其它目的、 特点和优点。 在附图中， 相同的或对应的技术特征或 部件将采用相同或对应的附图标记来表示。所述附图连同下面的详细说明 一起包含在本说明书中并且形成本说明书的一部分，而且用来进一步举例 说明本发明的优选实施例和解释本发明的原理和优点。 在附图中：
[28] 图 1为根据本申请第一种实施方式的选择成份载波的方法的流程图；
[29] 图 2 为才艮据本申请第一种实施方式的方法所适用的第一种场景的示 意图；
[30] 图 3 为才艮据本申请第一种实施方式的方法所适用的第二种场景的示 意图；
[31] 图 4 为才艮据本申请第一种实施方式的方法所适用的第三种场景的示 意图；
[32] 图 5-7为图 4所示的第三种场景中终端位置及其运动状态的三种情形 的示意图；
[33] 图 8为根据本申请另一种实施方式的选择成份载波的方法的流程图；
[34] 图 9 为根据本申请一种实施方式的适合选择成份载波的终端的结构 示意图；
[35] 图 10为根据本申请另一种实施方式的适合选择成份载波的终端的结 构示意图；
[36] 图 11为根据本申请再一种实施方式的适合选择成份载波的终端的结 构示意图；
[37] 图 12为根据本申请一种实施方式的适合选择成份载波的基站的结构 示意图；
[38] 图 13为根据本申请另一种实施方式的适合选择成份载波的基站的结 构示意图；
[39] 图 14为根据本申请再一种实施方式的适合选择成份载波的基站的结 构示意图；
[40] 图 15 为根据本申请一种实施方式的更新主成份载波的方法的流程 图；
[41] 图 16为所述更新主成份载波的方法中的切换流程的示意图；
[42] 图 17为根据本申请另一种实施方式的更新主成份载波的方法的流程 图；
[43] 图 18为所述更新主成份载波的方法中的重配置流程的示意图；
[44] 图 19为所述重配置流程的一种变型的示意图；
[45] 图 20、 21、 22分别为图 16、 18、 19所示流程的一种变型的示意图；
[46] 图 23、 24、 25分别为图 16、 18、 19所示流程的另一种变型的示意图；
[47] 图 26为根据本申请一种实施方式的更新第二成份载波的方法的流程 图；
[48] 图 27为所述更新第二成份载波的方法中的重配置流程的示意图； [49] 图 28为所述重配置流程的一种变型的示意图；
[50] 图 29为根据本申请一种实施方式的适于更新主成份载波的基站的结 构示意图；
[51] 图 30为根据本申请另一种实施方式的适于更新主成份载波的基站和 相应的终端的结构示意图；
[52] 图 31为根据本申请再一种实施方式的适于更新主成份载波的基站和 相应的终端的结构示意图；
[53] 图 32为根据本申请一种实施方式的适于更新第二成份载波的基站的 结构示意图；
[54] 图 33为根据本申请另一种实施方式的适于更新第二成份载波的基站 和相应的终端的结构示意图。 具体实施方式
[55] 在下文中将结合附图对本发明的示范性实施例进行描述。为了清楚和 简明起见， 在说明书中并未描述实际实施方式的所有特征。 然而， 应该了 解，在开发任何这种实际实施例的过程中必须做出很多特定于实施方式的 决定， 以便实现开发人员的具体目标， 例如， 符合与系统及业务相关的那 些限制条件， 并且这些限制条件可能会随着实施方式的不同而有所改变。 此外， 还应该了解， 虽然开发工作有可能是非常复杂和费时的， 但对得益 于^^开内容的本领域技术人员来说， 这种开发工作仅仅是例行的任务。
[56] 在此，还需要说明的一点是， 为了避免因不必要的细节而模糊了本发 明，在附图中仅仅示出了与至少根据本发明的方案密切相关的装置结构和 /或处理步骤， 而省略了与本发明关系不大的其他细节。
[57] 尤其是， 当涉及连接关系和信息的流动时， 附图中的图示和说明书中 的描述仅涉及与发明密切相关的部分，而未穷尽图示或者列举所有的连接 和所有的信息流动。
成份载波的选择
第一实施方式
[58] 在本申请中，在载波汇聚通信网络中可供终端和基站使用的载波称为 可用载波。 终端已经在使用的载波称之为成份载波（ component carrier ), 成份载波也是可用载波。工作在载波汇聚模式下的终端的成份载波包括一 个主成份载波 ( PCC , primary component carrier )和至少一个第二成份 载波 ( SCC， secondary component carrier )。
[59] 在载波汇聚通信网络中，基站和终端可以采用位于不同频段的载波进 行通信。 对于频段不同的载波， 基站天线的覆盖范围往往存在变化。 考虑 到这一点，本申请提出针对不同的覆盖范围分布模式， 釆用不同的成份载 波选择策略。
[60] 因此，如图 1所示，提供了一种在载波汇聚通信网络中选择成份载波 的方法， 包括： 确定终端能够使用的各可用载波的覆盖范围 （步骤 102 ); 确定各可用载波的覆盖范围的分布是否符合预定分布模式（步骤 104 ); 在符合所述预定分布模式的情况下，至少根据所述分布模式所决定的准则 确定要使用的成份载波（步骤 106 )。 [61] 基站的所有可用载波的覆盖范围对于基站来说是已知的。 因此，基于 终端的位置， 就能够获得终端能够使用的各可用载波的覆盖范围。 显然， 终端能够使用某可用载波，是指终端在该可用载波的覆盖范围之内。终端 的位置既可以由多个基站联合定位，亦可由终端借助于卫星定位系统例如 GPS (全球定位系统）确定并提供给基站。
[62] 如前所述，本申请提出根据覆盖范围的分布模式来调整成份载波选择 策略。 本申请设想了三种可能的应用场景， 分别如图 2 - 4所示， 可以在 每一种场景下采用不同的成份载波选择策略。 当然，也完全可以只考虑其 中一种或者两种应用场景，或者考虑更多的应用场景并设置更多的选择策 略。 为简明起见， 在本申请所举示例中， 仅有两种可用载波， 但是在实际 应用中可以有多个可用载波。
[63] 第一种应用场景， 也就是第一种可用载波覆盖范围分布模式如图 2 所示。 在该分布模式中， 各基站 210、 220、 230分别使用两种载波 F1和 F2, 并且 Fl、 F2对应的小区覆盖范围基本上重合， 能够提供大致相同的 覆盖区域。 在这种情况下， F1和 F2可能位于相同的载波频带内， 是典型 的连续性载波汇聚。
[64] 在该应用场景下，只要终端 250在小区覆盖范围内，则同时在两种载 波 Fl、 F2的覆盖范围内。 因此， 在这种情况下， 如果不考虑其它条件， 则两种载波 Fl、 F2具有同等地位， 可以任意选择其中任何一个载波 F1 或者 F2作为新的成份载波，或者进一步考虑其它条件从中选择一个载波。
[65] 例如， 可以将各载波的信号质量、 干扰大小、 负载状况、 上行和下行 链路的物理资源数量（如 PDCCH (物理层下行控制信道）等）作为成份 载波的选择依据。 具体地， 对终端而言， 该终端在某个载波上的信号质量 高、 受到的干扰小、 该载波的负载相对较低、 其拥有的上行和下行的物理 资源越多， 则该载波被选为成份载波的概率则相对较大。
[66] 以上考虑的各种因素可以具有不同的优先级或者不同的权重。
[67] 在设定各种因素的优先级的情况下，基于具有较高优先级的因素作出 决策。 例如， 可以对信号质量、 上行和下行链路的物理资源数量、 干扰大 小和负载状况设定任何顺序的优先级， 也就是说， 基于优先级的设定， 可 以基于上述因素中的任何一个来确定候选成份载波。或者，可以对所述因 素设置不同的优先级组， 例如信号质量、上行和下行链路的物理资源数量 的优先级高于干扰大小和负载状况的优先级， 或者设置相反的优先级顺 序，或者设置包含不同的因素或者不同数量的因素的不同的优先级组。也 就是说，基于优先级组和优先级组的优先级顺序的设定，可以单独地基于 任何一组因素来确定候选成份载波。
[68] 在上述每一个优先级组内部，例如在信号质量以及上、下行链路物理 资源数量构成的组中，可以对各种因素设置权重（可以相同或者视情况而 定不同）。
[69] 在对各种因素设定不同的权重的情况下，就是综合考虑各种因素对成 份载波的选择的影响。视实际应用的需要， 可以设定任何权重分布。 一般 而言， 可以设定信号质量、上行和下行链路的物理资源数量的权重高于干 扰大小和负载状况的权重。
[70] 在第二种应用场景，也就是第二种可用载波覆盖范围分布模式中，如 图 3所示， 各基站 310、 320、 330分别使用两种载波 F3和 F4， 并且 F4 的覆盖范围大于并基本上包含 F3的覆盖范围， 其中 F4对应的小区主要 保证覆盖性， F3对应的小区主要用于提高吞吐量。 在这种情况下， F3和 F4可能位于不同的载波频带内， 属于非连续性载波汇聚。
[71] 在该应用场景下， 当终端 250只在 F4的覆盖范围内而不在 F3的覆 盖范围内时， 由于可用载波只有 F4—个， 因此不存在载波选择的问题。 当终端 250同时在两种载波 F3、 F4的覆盖范围内时， 即存在载波选择问 题。 按照本申请提出的一种实施方式， 在这种情况下， 如果不考虑其它条 件， 可以选择覆盖范围较大的载波也就是 F4作为新的成份载波。 如果覆 盖范围较大的载波有多个而且覆盖范围基本相同，则进一步按照第一种场 景的选择策略进一步选择成份载波， 这在下文将有更详细的说明。
[72] 当然，类似于第一种场景，可以在进一步考虑其它条件的情况下从中 选择一个载波。
[73] 例如， 同样的， 可以将各载波的信号质量、 干扰大小、 负载状况、 上 行和下行链路的物理资源数量（如 PDCCH等）也作为成份载波的选择依 据。 具体地， 对终端而言， 该终端在某个载波上的信号质量高、 受到的干 扰小、 该载波的负载相对较低、 其拥有的上行和下行的物理资源越多， 则 该载波被选为主成份载波的概率则相对较大。
[74] 以上考虑的各种因素， 包括各可用载波的覆盖范围在内，可以具有不 同的优先级或者不同的权重。
[75] 在设定各种因素的优先级的情况下，基于具有较高优先级的因素作出 决策。 例如， 可以对可用载波覆盖范围、 信号质量、 上行和下行链路的物 理资源数量、 干扰大小和负载状况设定任何顺序的优先级， 也就是说， 基 于优先级的设定， 可以基于上述因素中的任何一个来确定候选成份载波。 或者， 可以对所述因素设置不同的优先级组， 例如覆盖范围的优先级高于 信号质量、 上行和下行链路的物理资源数量的优先级， 信号质量、 上行和 下行链路的物理资源数量的优先级高于干扰大小和负载状况的优先级，或 者设置相反的优先级顺序，或者设置包含不同的因素或者不同数量的因素 的不同的优先级组。也就是说，基于优先级组和优先级组的优先级顺序的 设定， 可以单独地基于任何一组因素来确定候选成份载波。
[76] 在上述每一个优先级组内部，例如在信号质量以及上、下行链路物理 资源数量构成的组中，可以对各种因素设置权重（可以相同或者视情况而 定不同）。
[77] 在对各种因素设定不同的权重的情况下，就是综合考虑各种因素对成 份载波的选择的影响。视实际应用的需要， 可以设定任何权重分布。 一般 而言， 可以设定覆盖范围的权重高于信号质量、上行和下行链路的物理资 源数量的权重，信号质量、上行和下行链路的物理资源数量的权重高于干 扰大小和负载状况的权重。
[78] 在第三种应用场景，也就是第三种可用载波覆盖范围分布模式中，如 图 4所示， 各基站 410、 420、 430分别使用两种载波 F5和 F6， 两个可用 载波的覆盖范围基本上不重合也不包含， 而是相互交迭， 其中 F5对应的 小区主要保证覆盖性， F6对应的小区主要用于提高吞吐量（或者反之）。 本应用场景的特点在于 F6对应的小区天线指向 F5对应的小区中的边缘 地区， 这样该应用场景可以极大地提高 F5小区边缘地区的吞吐量。 在这 种情况下， F5和 F6可能位于不同的载波频带内，属于非连续性载波汇聚。
[79] 在该应用场景下， 当终端 250只在 F5的覆盖范围内或者只在 F6的 覆盖范围内时， 由于可用载波只有 F5或者 F6—个， 因此不存在载波选 择的问题。 当终端 250同时在两种载波 F5、 F6的覆盖范围内， 也就是在 两种可用载波覆盖区域的交迭区域内时， 即存在载波选择问题。
[80] 按照本申请提出的一种实施方式，在这种情况下，如果不考虑其它条 件，可以至少根据终端所处位置及其移动方向和移动速率确定候选成份载 波。
[81] 在本申请中， 设想了终端位置及其运动的三种模式， 如图 5 到图 Ί 所示。 但是应当了解， 终端的位置及其运动可以有其它的划分方式， 这里 的三种模式也可以有变化、 拆分或者合并。
[82] 第一种模式如图 5所示， 终端 250在一个可用载波 F5的边缘而正远 离该可用载波。 在这种情况下， 如果终端正在快速远离该可用载波， 则赋 予远离方向所对应的可用载波（这里就是 F6 )较高的成为候选成份载波 的概率。 当然也可以直接选择远离方向所对应的载波作为候选成份载波， 也就是所述概率为 100 %。 如果所述远离方向所对应的可用载波有多个 (除了 F6还有其它可用载波），则至少根据覆盖范围的大小在这多个可用 载波中确定候选成份载波，也就是类似于前文所述的第一种或者第二种应 用场景。
[83] 上面提到了 "快速" 远离。 这里， "快速，， 的含义是指根据其速度， 预期终端很快将脱离目前所在的载波覆盖范围， 而不仅仅是小范围的运 动。 例如， 如果终端用户只是在小范围内走动， 他可能并没有脱离该载波 范围（例如前往另一地）的意图， 如果在此时更新载波则导致不必要的操 作。 在具体应用当中， "快速" 究竟是多大的速度， 可以才艮据实际应用具 体设定。
[84] 图 6图示了另一种终端位置和运动模式， 即，终端 250位于某一可用 载波 F5的边缘并且朝向该可用载波 F5内部移动。 此时， 至少才艮据可用 载波 F5和 F6的覆盖范围的大小确定候选成份载波， 即类似于第二种应 用场景。 如果覆盖范围恰好相同， 则应用第一种场景下的选择策略。
[85] 图 7 图示了另一种终端位置和运动模式， 即， 终端 250在可用载波 F5和 F6的交迭区域中远离交迭区域边缘的位置，也就是说在交迭区域的 内部。 此时， 也至少根据可用载波 F5、 F6覆盖范围的大小确定候选成份 载波， 即类似于第二种应用场景。 如果覆盖范围恰好相同， 则应用第一种 场景下的选择策略。
[86] 当然，类似于第一种和第二种应用场景，可以在进一步考虑其它条件 的情况下从中选择一个载波。
[87] 例如， 同样的， 可以将各载波的信号质量、 干扰大小、 负载状况、 上 行和下行链路的物理资源数量（如 PDCCH等）也作为成份载波的选择依 据。 这些因素， 包括终端所处位置及其移动方向和移动速率、 各可用载波 的覆盖范围在内， 可以具有不同的优先级或者不同的权重。
[88] 在设定各种因素的优先级的情况下，基于具有较高优先级的因素作出 决策。 例如， 可以对终端所处位置、 终端移动方向、 终端移动速率以及可 用载波覆盖范围、信号质量、 上行和下行链路的物理资源数量、 干扰大小 和负载状况设定任何顺序的优先级， 也就是说， 基于优先级的设定， 可以 基于上述因素中的任何一个来确定候选成份载波。或者，可以对所述因素 设置不同的优先级组， 例如终端所处位置、 终端移动方向、 终端移动速率 以及可用载波覆盖范围的优先级高于信号盾量、上行和下行链路的物理资 源数量的优先级，信号质量、上行和下行链路的物理资源数量的优先级高 于干扰大小和负载状况的优先级，或者设置相反的优先级顺序，或者设置 包含不同的因素或者不同数量的因素的不同的优先级组。也就是说，基于 优先级组和优先级组的优先级顺序的设定，可以单独地基于任何一组因素 来确定候选成份载波。
[89] 在上述每一个优先级组内部，例如在信号质量以及上、下行链路物理 资源数量构成的组中，可以对各种因素设置权重（可以相同或者视情况而 定不同）。
[90] 在对各种因素设定不同的权重的情况下，就是综合考虑各种因素对成 份载波的选择的影响。视实际应用的需要， 可以设定任何权重分布。 一般 而言， 可以设定终端所处位置、 终端移动方向、 终端移动速率以及可用载 波覆盖范围的权重高于信号质量、 上行和下行链路的物理资源数量的权 重，信号质量、上行和下行链路的物理资源数量的权重高于干扰大小和负 载状况的权重。
第二实施方式
[91] 在第一实施方式中，针对不同的应用场景描述了成份载波的选择。在 实际应用当中， 如前文已述， 各种应用场景可能是混合的。 例如， 各可用 载波的覆盖范围既可能存在完全重叠 （第一种应用场景）， 也有可能存在 包含关系 （第二种应用场景）或者部分交迭（第三种应用场景）。
[92] 因此， 如图 8所示， 根据本申请提出的一种实施方式， 先后运用适用 于不同应用场景的选择策略来选择候选成份载波，逐步缩小候选成份载波 范围，直到得出要使用的成份载波。也就是说，在第一实施方式的基础上， 当各可用载波的覆盖范围的分布包括至少两种预定模式时，先按照其中一 种模式所对应的准则确定候选成份载波，然后再按照另一模式所对应的准 则在所述候选成份载波中确定第二候选成份载波，直到得到唯一的候选成 份载波。
[93] 具体地，如图 8所示， 首先确定终端能够使用的各可用载波的覆盖范 围 （步骤 102 )。 然后确定各可用载波的覆盖范围的分布是否符合预定分 布模式（步骤 104 )。 这两个步骤在第一实施方式中已有详细描述， 在此 不再重复。
[94] 在确定覆盖范围有多种分布模式例如第一模式 806和第二模式 910 的情况下，可以先按照第一模式所对应的第一准则确定候选成份载波（步 骤 808 )。 例如， 如果第一模式是前述第三种应用场景， 则釆用第三种应 用场景的成份载波选择策略来确定候选成份载波。所确定的候选成份载波 可能是唯一的， 此时流程结束， 使用所确定的候选成份载波。 所确定的候 选成份载波也有可能不唯一。例如在第三种应用场景下，如果终端运动方 向上有多个可用载波而且各可用载波的其它方面的因素或者根据选择策 略所考虑的因素也大致相同，则可能有多个可用载波均可作为候选成份载 波。此时就需要应用第二模式所对应的第二准则（例如第一种或者第二种 应用场景所对应的选择策略）来在所述多个候选成份载波中继续选择（步 骤 812 )， 得到要使用的成份载波。
[95] 图 8仅图示了两种分布模式的情况。 显然， 分布模式可以有更多种， 并且各分布模式的选择策略的应用顺序可以是随意的。
第三实施方式
[96] 另外， 当终端工作在载波汇聚模式下时， 除了一个主成份载波， 还有 一个或多个第二成份载波 ( SCC , Secondary Component Carrier ) 同时 在工作，这些载波都处于激活状态。 同时仍然可能有一个或多个载波处于 已配置但未激活状态， 还可能有一个或者多个载波处于未配置状态。
[97] 当需要改变主成份载波时，新的主成份载波可以从已在使用的第二成 份载波中选择，也可以从尚未配置或者已经配置但尚未激活的可用载波中 选择。 当需要添加第二成份载波时，新的第二成份载波可以从尚未配置的 可用载波中选择， 也可以从已经配置但尚未激活的可用载波中选择。
[98] 显然， 不同状态的载波在添加时的操作复杂程度各有不同。 因此， 在 第一实施方式和第二实施方式的基础上，在选择成份载波时可以先获取各 可用载波的激活和配置状态，从而在确定候选成份载波时还考虑各可用载 波的激活和配置状态，其中，处于激活状态的可用载波的优先级高于已配 置但未激活的可用载波，已配置但未激活的可用载波的优先级高于未配置 的可用载波。
[99] 这里， "更高优先级" 的含义是具有更大的权重， 或者， 在某些情况 下， 例如在其它条件相同或者近似的情况下， 则起到决定性的作用。
第四实施方式
[100] 第一到第三实施方式中所描述的选择成份载波的方法可以用于选择 主成份载波。
[101] 用于终端初始接入的小区所对应的载波，或者终端重建连接时所用的 载波， 自然地默认为主成份载波。 但是， 随着终端、 基站状态和网络环境 的变化， 可能需要更新主成份载波。 此时， 可以使用第一到第三实施方式 所述的选择成份载波的方法来确定新的主成份载波，然后从旧的主成份载 波转到新的主成份载波。
[102] 从旧的主成份载波转到新的主成份载波的转换可以用各种方式进行， 现有技术中已经存在各种各样的方式。在本申请中， 申请人也提出了新的 主成份载波更新流程， 详见后续各实施方式的描述。
[103] 主成份载波的更新可以进行多次。在终端初始接入小区或者重建连接 后的首次主成份载波更新中， 所述旧的主成份载波为初始主成份载波，也 就是终端用于初始接入或者无线资源连接重建时所用的，默认为主成份载 波的载波。
[104] 载波汇聚可能涉及不同的频带。也就是说，终端可用的各个载波可能 在同一频带内，也可能在不同的频带内。更新前后的主成份载波是否位于 同一频带内会影响主成份载波更新时的开销。 因此， 主成份载波的更新还 可以考虑可用载波之间的频率关系。
[105] 具体来说，在更新主成份载波时，可以先获取各可用载波的频语信息， 然后在确定候选成份载波时还考虑各可用载波的频率与旧的主成份载波 的关系， 其中， 激活和配置状态相同的可用载波中， 与旧的主成份载波位 于同一频带内的可用载波具有更高的优先级。 同样， "更高优先级" 的含 义是具有更大的权重， 或者， 在某些情况下， 例如在其它条件相同或者近 似的情况下， 则起到决定性的作用。 第五实施方式
[106] 第一到第三实施方式中所描述的选择成份载波的方法可以用于选择 第二成份载波。
[107] 用于终端初始接入的小区所对应的载波，或者终端重建连接时所用的 载波， 自然地默认为主成份载波。 然而随着用户服务质量需求的提高， 可 能需要增加新的载波形成载波汇聚。
[108] 在这种情况下，可以先使用第一到第三实施方式所述的选择成份载波 的方法确定新的第二成份载波， 然后添加该新的第二成份载波。 第二成份 载波的添加可以用各种方式进行， 现有技术中已经存在各种各样的方式。 在本申请中， 申请人也提出了新的第二成份载波添加流程，详见后续各实 施方式的描述。
第六实施方式
[109] 第一到第五实施方式所述的选择成份载波的方法在通信系统中可以 由基站在终端的协助下进行， 也可以由终端在基站的协助下进行。
[110] 因此，在本实施方式中， 首先提出了能够实现前述各种实施方式的终 端。
[111] 在本实施方式以及后续各实施方式对终端和基站的描述中， 除非必 要， 不再重复叙述前述各实施方式的详细描述， 而可参见前述各实施方式 的描述。
[112] 如图 9所示，一种适于载波汇聚通信网络的终端 920与基站 960通信， 在基站 960的协助下确定成份载波， 并通知给基站 960。 具体来说， 该终 端包括： 终端信息获取单元 902，获取终端位置信息和 /或终端位置对应的 载波分布信息； 载波分布模式确定单元 904， 确定终端所在位置所对应的 各可用载波的覆盖范围的分布是否符合预定分布模式；成份载波确定单元 906, 在终端所在位置所对应的各可用载波的覆盖范围符合所述预定分布 模式的情况下，至少根据所述分布模式所决定的准则确定要使用的成份载 波； 以及通知单元 908， 将所确定的要使用的成份载波通知给基站（过程 ( 4 ) )。
[113] 其中，终端信息获取单元 902的目的是获得终端可用的载波的覆盖范 围的信息， 以便载波分布模式确定单元确定可用载波覆盖范围分布模式。 可用载波覆盖范围信息需基于终端的位置和基站载波的参数来确定。而终 端位置既可以由多个基站 960联合定位，亦可由终端借助于卫星定位系统 940例如 GPS (全球定位系统）确定。
[114] 因此，在卫星定位的情况下，终端信息获取单元 902可以包括终端内 置的与卫星定位系统通信（过程（ 1 ) )的定位设备， 其将终端位置传递给 基站 960 (过程（2 ) )， 基站 960基于该终端位置信息将可用载波覆盖范 围的信息传递给终端信息获取单元 902 (过程（3 ) )。 在另一种实施变型 中， 终端 902也可以不通过基站 960获取可用载波覆盖范围信息。 例如， 终端 902可以通过检测各载波的信号强度来确定自己是否位于某个载波 的覆盖范围内。 在这种情况下， 就可用载波覆盖范围的确定而言， 就不需 要过程 ( 2 )和过程（3 )。
[115] 另外， 在基站定位的情况下， 由于终端位置本身是由基站得到的， 因 此基站可以直接依据该位置得到可用载波覆盖范围信息，从而终端中的终 端信息获取单元可以直接从基站 960获取所述信息 （过程（ 3 ) )。
[116] 当载波分布模式确定单元 904 判断所述预定分布模式为各可用载波 的覆盖范围基本相同时，所述成份载波确定单元 906将各可用载波均作为 候选成份载波。
[117] 当载波分布模式确定单元 904 判断所述预定分布模式为至少一个可 用载波的覆盖范围被基本上包含在至少另一个可用载波的覆盖范围之内 时，所述成份载波确定单元 906至少根据覆盖范围的大小来确定候选成份 载波。
[118] 当载波分布模式确定单元 904 判断所述预定分布模式为至少两个可 用载波的覆盖范围基本上不重合也不包含， 而是相互交迭时， 所述终端信 息获取单元 902获取有关所述终端的移动方向和移动速率的信息，并且所 述成份载波确定单元 906被进一步配置为至少根据所述终端所处位置及 其移动方向和移动速率来确定候选成份载波。
[119] 终端的移动方向和移动速率是基于终端在不同时刻的位置来确定的。 如前所述， 终端位置可以由内置的卫星定位设备确定， 也可以由基站 960 确定。无论在哪种情况下，都可以由终端信息获取单元基于从卫星定位设 备或者基站 960获取的位置信息来计算终端移动方向和移动速率。在从基 站 960获取位置信息的情况下， 基站 960可以通过过程（ 3 ) (当然也可以 通过别的过程 ) 向终端信息获取单元提供终端的位置信息。 [120] 另外，在基站 960计算终端位置的情况下，终端的移动方向和移动速 率的计算当然也可以由基站来完成。 此时， 基站 960只需要通过过程（3 ) (当然也可以通过别的过程）向终端信息获取单元直接提供终端的位置信 息及其移动方向和移动速率信息即可。
[121] 这样， 所述成份载波确定单元 906可以被进一步配置为： 如果终端信 息获取单元 902获取的信息表明终端位于某一可用载波边缘并且正在快 速远离该可用载波，则赋予远离方向所对应的可用载波较高的成为候选成 份载波的概率；如果终端信息获取单元 902获取的信息表明终端位于某一 可用载波的边缘并且朝向该可用载波移动，或者如果终端在交迭区域中远 离交迭区域边缘的位置， 则至少根据覆盖范围的大小确定候选成份载波。
[122] 所述成份载波确定单元 906可以被进一步配置为：如果所述远离方向 所对应的可用载波有多个，则至少根据覆盖范围的大小在这多个可用载波 中确定候选成份载波。
[123] 所述成份载波确定单元 906 可以被进一步配置为还至少根据以下因 素中的至少一个来确定候选成份载波： 信号质量、上行和下行链路的物理 资源数量、 干扰大小和负载状况。
[124] 这里，信号质量是终端本身按照传统技术即可获得的信息，其它基站、 载波或者终端等对当前终端的干扰也是按照传统技术基于信号质量可以 得到的信息。至于上行和下行链路的物理资源数量和负载状况， 则是基于 传统技术可以从基站获得的信息（见图 10中的过程（5 ) )。 当考虑当前终 端对其它终端的干扰时，相关信息也需从基站获得（基站从其它终端的报 告获取信息）。
[125] 所述成份载波确定单元 906可被进一步配置为：在确定候选成份载波 时，覆盖范围、终端所处位置及其移动方向和移动速率的重要性高于信号 质量、 上行和下行链路的物理资源数量的重要性， 信号质量、 上行和下行 链路的物理资源数量的重要性高于干扰大小和负载状况的重要性； 或者， 覆盖范围、 终端所处位置及其移动方向和移动速率、信号质量、 上行和下 行链路的物理资源数量、干扰大小和负载状况中的任何一个或者多个单独 地或者共同地确定候选成份载波。
[126] 所述成份载波确定单元 906可被进一步配置为：当各可用载波的覆盖 范围的分布包括至少两种预定模式时，先按照其中一种模式所对应的准则 确定候选成份载波，然后再按照另一模式所对应的准则在所述候选成份载 波中确定第二候选成份载波， 直到得到唯一的候选成份载波。
[127] 所述终端还可以包括载波状态获取单元 910 (图 11 )， 获取各可用载 波的激活和配置状态。其中， 所述成份载波确定单元 906可被进一步配置 为： 确定候选成份载波时还考虑各可用载波的激活和配置状态， 其中， 处 于激活状态的可用载波的优先级高于已配置但未激活的可用载波，已配置 但未激活的可用载波的优先级高于未配置的可用载波。
[128] 需要注意的是， 图 11中图示的实施方式没有图 10中的过程（5 )， 但 从以上描述可以知道， 在另一种变型中， 也可以有图 10中的过程（5 )。
[129] 本实施方式的终端所确定的所述成份载波可以为主成份载波，也可以 为第二成份载波。
[130] 当用来确定主成份载波时，所述成份载波确定单元 906可被进一步配 置为在确定候选成份载波时还考虑各可用载波的频率与旧的主成份载波 的关系， 其中， 激活和配置状态相同的可用载波中， 与旧的主成份载波位 于同一频带内的可用载波具有更高的优先级。
[131] 本实施方式的上述说明公开了一种与基站相互作用的终端。显然，这 也同时公开了由上述终端及与之通信的基站构成的通信系统。
第七实施方式
[132] 第六实施方式描述了实现第一到第五实施方式所述的选择成份载波 的方法的终端。第七实施方式将描述实现第一到第五实施方式所述的选择 成份载波的方法的基站。
[133] 在本实施方式以及后续各实施方式对终端和基站的描述中， 除非必 要， 不再重复叙述前述各实施方式的详细描述， 而可参见前述各实施方式 的描述。
[134] 如图 12所示， 一种载波汇聚通信网络中的基站 1220与终端 1260通 信，在终端 1260的协助下确定成份载波，并通知给终端 1260。具体来说， 该基站包括： 终端信息获取单元 1202， 获取终端位置信息和 /或终端位置 对应的载波分布信息； 载波分布模式确定单元 1204， 确定终端所在位置 所对应的各可用载波的覆盖范围的分布是否符合预定分布模式；成份载波 确定单元 1206， 在终端所在位置所对应的各可用载波的覆盖范围符合所 述预定分布模式的情况下，至少才艮据所述分布模式所决定的准则确定要使 用的成份载波； 以及通知单元 1208， 将所确定的要使用的成份载波通知 给终端 （过程（4 ) )。
[135] 其中， 终端信息获取单元 1202的目的是获得终端可用的载波的覆盖 范围的信息， 以便载波分布模式确定单元确定可用载波覆盖范围分布模 式。 可用载波覆盖范围信息需基于终端的位置和基站载波的参数来确定。 而终端位置既可以由基站 1220本身测量，亦可由终端 1260借助于卫星定 位系统 940例如 GPS (全球定位系统）确定（过程（1 ) )。
[136] 因此，在卫星定位的情况下，终端信息获取单元 1202可以从终端 1260 获取终端内置定位设备的定位信息 （过程（2 ) )， 从而进一步基于基站的 可用载波信息获得终端可用的载波的覆盖范围的信息。
[137] 另外， 在基站定位的情况下， 由于终端位置本身是由基站得到的， 因 此基站可以直接依据该位置得到可用载波覆盖范围信息。
[138] 当载波分布模式确定单元 1204判断所述预定分布模式为各可用载波 的覆盖范围基本相同时， 所述成份载波确定单元 1206将各可用载波均作 为候选成份载波。
[139] 当载波分布模式确定单元 1204判断所述预定分布模式为至少一个可 用载波的覆盖范围被基本上包含在至少另一个可用载波的覆盖范围之内 时， 所述成份载波确定单元 1206至少根据覆盖范围的大小来确定候选成 份载波。
[140] 当载波分布模式确定单元 1204判断所述预定分布模式为至少两个可 用载波的覆盖范围基本上不重合也不包含， 而是相互交迭时， 所述终端信 息获取单元 1202获取有关所述终端的移动方向和移动速率的信息， 并且 所述成份载波确定单元 1206被进一步配置为至少根据所述终端所处位置 及其移动方向和移动速率来确定候选成份载波。
[141] 终端的移动方向和移动速率是基于终端在不同时刻的位置来确定的。 如前所述， 终端位置可以由终端内置的卫星定位设备确定，也可以由基站 1220确定。 无论在哪种情况下， 都可以由终端信息获取单元基于从终端 1260 获取的位置信息或者基站计算的终端位置来计算终端移动方向和移 动速率。
[142] 另外， 在终端 1260通过卫星定位设备获得终端位置的情况下， 终端 的移动方向和移动速率的计算当然也可以由终端自身来完成。此时， 终端 1260 只需要通过过程 ( 2 ) (当然也可以通过别的过程） 向终端信息获取 单元直接提供终端的位置信息及其移动方向和移动速率信息即可。
[143] 这样， 所述成份载波确定单元 1206可以被进一步配置为： 如果终端 信息获取单元 1202获取的信息表明终端位于某一可用载波边缘并且正在 快速远离该可用载波，则赋予远离方向所对应的可用载波较高的成为候选 成份载波的概率； 如果终端信息获取单元 1202获取的信息表明终端位于 某一可用载波的边缘并且朝向该可用载波移动，或者如果终端在交迭区域 中远离交迭区域边缘的位置，则至少根据覆盖范围的大小确定候选成份载 波。
[144] 所述成份载波确定单元 1206可以被进一步配置为： 如果所述远离方 向所对应的可用载波有多个，则至少根据覆盖范围的大小在这多个可用载 波中确定候选成份载波。
[145] 所述成份载波确定单元 1206可以被进一步配置为还至少根据以下因 素中的至少一个来确定候选成份载波： 信号质量、上行和下行链路的物理 资源数量、 干扰大小和负载状况。
[146] 这里，信号质量是终端本身按照传统技术即可获得的信息，其它基站、 载波或者终端等对当前终端的干扰也是按照传统技术基于信号质量可以 由终端得到的信息。 至于上行和下行链路的物理资源数量和负载状况， 则 ^^于传统技术可以由基站自身掌握的信息。当考虑当前终端对其它终端 的干扰时， 相关信息也由基站基于其它终端报告的信息获得。 因此， 成份 载波确定单元 1206在必要时从终端 1260获取有关的信息（见图 13中的 过程 ( 5 ) )
[147] 所述成份载波确定单元 1206可被进一步配置为： 在确定候选成份载 波时，覆盖范围、终端所处位置及其移动方向和移动速率的重要性高于信 号质量、 上行和下行链路的物理资源数量的重要性， 信号质量、 上行和下 行链路的物理资源数量的重要性高于干扰大小和负载状况的重要性； 或 者， 覆盖范围、 终端所处位置及其移动方向和移动速率、 信号质量、 上行 和下行链路的物理资源数量、干扰大小和负载状况中的任何一个或者多个 单独地或者共同地确定候选成份载波。
[148] 所述成份载波确定单元 1206可被进一步配置为： 当各可用载波的覆 盖范围的分布包括至少两种预定模式时，先按照其中一种模式所对应的准 则确定候选成份载波，然后再按照另一模式所对应的准则在所述候选成份 载波中确定第二候选成份载波， 直到得到唯一的候选成份载波。 [149] 所述基站还可以包括载波状态获取单元 1210， 获取各可用载波的激 活和配置状态。 其中， 所述成份载波确定单元 1206可被进一步配置为： 确定候选成份载波时还考虑各可用载波的激活和配置状态，其中，处于激 活状态的可用载波的优先级高于已配置但未激活的可用载波，已配置但未 激活的可用载波的优先级高于未配置的可用载波。这里， 由于可用载波的 激活和配置状态是终端自身的状态，因此本实施方式的基站需要通过过程
( 6 ) (图 14 )来从终端 1260获得该终端的可用载波的配置和激活状态信 自
[150] 需要注意的是， 图 14中图示的实施方式没有图 13中的过程（5 )， 但 从以上描述可以知道， 在另一种变型中， 也可以有图 13中的过程（5 )。
[151] 本实施方式的基站所确定的所述成份载波可以为主成份载波，也可以 为第二成份载波。
[152] 当用来确定主成份载波时， 所述成份载波确定单元 1206可被进一步 配置为在确定候选成份载波时还考虑各可用载波的频率与旧的主成份载 波的关系， 其中， 激活和配置状态相同的可用载波中， 与旧的主成份载波 位于同一频带内的可用载波具有更高的优先级。
[153] 本实施方式的上述说明公开了一种与终端相互作用的基站。显然，这 也同时公开了由上述基站及与之通信的终端构成的通信系统。
成份载波的更新
第八实施方式
[154] 上述各实施方式描述了如何选择成份载波，包括主成份载波和第二成 份载波。
[155] 而在选择了成份载波之后，还要釆用适当的流程从旧的主成份载波转 换到所选择的新的主成份载波，或者添加所选择的新的第二成份载波，或 者用所选择的新的第二成份载波代替某一旧的第二成份载波（事实上是添 加动作和删除动作的联合）。 另外， 还需恰当地确定更新或者添加成份载 波的时机。
[156] 因此， 如图 15所示， 在本实施方式中， 提出了一种在载波汇聚通信 网络中更新主成份载波的方法， 包括： 获取终端、 基站和 /或主成份载波 的状态信息 （步骤 1502 ); 确定所述状态信息是否符合预定条件 （步骤 1504 ); 在符合预定条件的情况下用新的主成份载波代替旧的主成份载波 (步骤 1506 )。
[157] 在现有技术中，可以有各种各样的参数表征终端、基站及其使用中的 成份载波和可使用的载波的性能、状态等等， 并可以通过各种测量或者通 信手段获取相关信息。针对这些信息，可以根据实际应用的需要设置各种 预定条件， 在满足预定条件的时候更新主成份载波。
[158] 作为说明性的示例而非限制性的列举，所考虑的进行主成份载波的更 新的条件可以包括下述条件中的至少一个：
[159] 1.终端移动到旧的主成份载波的覆盖范围外；
[160] 2.旧的主成份载波信号质量下降；
[161] 3.旧的主成份载波上、 下行链路的物理资源数量不够；
[162] 4.原基站对网络总体负载平衡以及用户间干扰等问题的考虑要求更 新主成份载波；
[163] 5.终端移动到新基站的覆盖范围内。
[164] 主成份载波的更新可以釆用切换流程，也可以釆用重配置流程。如图 16 所示， 在切换流程中， 旧的主成份载波所属基站向终端发送 "无线资 源控制" ( RRC , Radio Resource Control )重配置信息， 所述 "无线资源 控制" 重配置信息包括移动控制信息 (MobilityControlInfo), 所述移动控 制信息包括新的主成份载波的无线资源配置信息 (RadioResourceConfig)。 然后终端利用所述 "无线资源控制"重配置信息中的移动控制信息重新配 置 MAC (媒体访问控制）、 PDCP (分组数据汇聚协议）和 RLC (无线 链路控制）层， 更新安全密钥， 并利用所述新的主成份载波的无线资源配 置信息来配置新的主成份载波。
[165] 然后发起随机接入过程，接入新的主成份载波。 随机接入过程可以由 终端发起， 也可以由基站发起。 当由终端发起时， 是终端提出接入请求， 新的主成份载波所属基站根据资源和其它终端的接入请求情况予以分配 的过程， 是竟争性的， 也就是说随机接入是各个终端抢占资源的过程。 当 一次随机接入不成功时，视情况而定需要重试，或者需要重配置无限资源 配置信息，或者需要重新切换。 当随机接入过程由新的主成份载波所属基 站发起时，基站已经事先为终端预留了相应的资源， 因此终端予以应答即 可， 除非终端一侧的情况发生了变化。这种随机接入称为非竟争性的随机 接入。 [166] 在随机接入到新的主成份载波后，可以对旧的主成份载波去激活。去 激活可以釆用两种方式。一种是新的主成份载波所属基站直接向终端发送 去激活命令（如图 16所示），终端收到去激活命令后将旧的主成份载波去 激活。 另一种方式是使用隐式去激活方式将旧的主成份载波去激活 （图 16未示出）， 即终端不需要从基站接收去激活命令， 而是自行去激活旧的 主成份载波。这种自动动作例如可以是基于定时器完成的， 即系统预先定 义了旧的主成份载波的去激活时间，或者预先定义了去激活定时器的触发 条件。
[167] 需要注意的是， 这里提及了 "新的主成份载波所属基站"和 "旧的主 成份载波"所属基站。 当新旧主成份载波属于同一基站时， 上述两个术语 指的就是同一基站。
[168] 如前所述，主成份载波的更新也可以釆用重配置流程。如图 18所示， 与切换流程相比， 重配置流程可以没有随机接入过程和更新密钥的过程。 此外， RRC 重配置信息的内容也有所简化， 不包括移动控制信息而仅包 括新的主成份载波的无线资源配置信息。 因此， 终端在收到 RRC重配置 信息后只需要对新的主成份载波进行配置， 而无需重新配置 MAC、 PDCP、 RLC层和更新安全密钥， 因此能够降低由于更新主成份载波而带 来的额外系统开销， 避免更新主成份载波所带来的用户服务盾量下降问 题。 此时， 在 RRC消息体中并不需要包含新的主成份载波的所有相关配 置信息 （例如不包含移动控制信息）， 而只需要包含与原主成份载波相比 更新的配置信息即无线资源配置信息即可， 可以称之为增量信令。
第九实施方式
[169] 显然， 所有主成份载波的更新都可以釆用切换的方式。但是， 并不是 所有的主成份载波更新都可以釆用重配置的方式。这是因为， 只有当新旧 主成份载波具有相同的安全密钥并且不需要重置 MAC、 PDCP 和 RLC 层时才有可能采用重配置流程。
[170] 因此，本申请继续提出根据更新的场景来决定更新的流程，如果更新 前后的主成份载波从属于同一个基站， 则釆用重配置流程更新主成份载 波。如果更新前后的主成份载波不属于同一个基站， 则釆用切换流程更新 主成份载波。
[171] 具体来说， 如图 17所示， 更新主成份载波的流程包括： 确定新的主 成份载波是否与旧的主成份载波属于同一基站（步骤 1702 ); 如果属于同 一基站，则由该基站采用重配置流程用新的主成份载波代替旧的主成份载 波（步骤 1704 ); 否则由旧的主成份载波所属基站向新的主成份载波所属 基站发送切换请求， 从新的主成份载波所属基站获取有关信息 （步骤 1704 )， 然后釆用切换流程用新的主成份载波代替旧的主成份载波（步骤 1706 )。
[172] 具体而言， 在步骤 1704中， 旧的主成份载波所属基站（下面简称为 旧基站）向新的主成份载波所述基站（下面简称为新基站）发送切换请求， 以便新基站准备终端切换到新的主成份载波所需的配置信息，从而旧基站 能够从新基站获取所需的配置信息，以便旧基站在切换流程中准备要发给 终端的 RRC重配置信息。
[173] 该实施方式中的重配置流程 1704和切换流程 1706与上文结合图 16 和图 18所述的重配置流程和切换流程是一样的。 稍有不同之处在于， 由 于新的主成份载波与旧的主成份载波不属于同一基站， 因此虽然 RRC重 配置信息仍是由旧基站发送的，但是在完成配置后的随机接入过程是与新 基站之间的交互（详见下文结合图 31所作的描述）。至于终端完成配置之 后的应答（或者确认） 消息， 也是直接发给新基站。
[174] 对比第八实施方式和第九实施方式， 由于在切换的过程中， 需要重置 MAC. PDCP和 RLC层， 并更新安全密钥， 由此不可避免地将增加系统 开销和出现通信中断的现象。而釆用重配置流程时，系统开销将大大降低， 通信中断时间也会减少。 因此， 第九实施方式提出的根据更新前后的主成 份载波是否从属于同一基站而决定是否使用切换流程或者重配置流程更 新主成份载波的方式能够降低由于更新主成份载波而带来的额外系统开 销， 避免更新主成份载波所带来的用户服务盾量下降等问题。
[175] 在上述重配置流程当中，新的主成份载波与旧的主成份载波一般还应 当位于相同的频段、具有相同的时间提前量并且都与基站保持同步。如果 不满足这样的条件， 则如图 19所示， 在将旧的主成份载波去激活之前， 还要发起对新的主成份载波的随机接入。
第十实施方式
[176] 在第八和第九实施方式中，隐含的前提是新的主成份载波已经被初始 配置且已激活。但是在实际应用当中，也存在新的主成份载波尚未初始配 置， 或者虽已被初始配置但尚未被激活的场景。
[177] 在这种场景下，无疑要对拟作为新的主成分载波的尚未初始配置的载 波进行初始配置并激活，对拟作为新的主成分载波的已初始配置但尚未激 活的载波进行激活。 初始配置（即该载波的添加）应当在切换流程或者重 配置流程一开始就进行（图中未示出）， 但是激活过程在时间顺序上比较 灵活。 如对应于图 16、 18、 19的图 20 - 22所示， 激活过程可以在配置完 成或者随机接入过程之后，或者旧的主成份载波去激活（图中所示为基站 发出去激活命令，但如前文所述，去激活过程也可以是终端自身隐式去激 活）之前， 由基站发出激活命令。 或者， 如对应于图 16、 18、 19的图 23 - 25所示，激活过程也可以在发出 RRC重配置信息之前由基站发送激活 命令。
[178] 此外激活命令可以与其它的命令合并或者同时发送。例如，如果新主 成份载波是未初始配置的状态，则可以将将初始配置和激活这两个过程合 并，定义一个新的 "配置激活"过程同时完成配置和激活，即基站发出 "配 置激活"命令， 终端收到该命令后一次完成配置和激活。 此外， 激活命令 还可以与所述 "无线资源控制" 重配置信息同时发送。
[179] 在另外一种实施方式中，初始配置流程和之后的切换流程或重配置流 程可以合并， 包含在一个命令中进行， 而不需要分开。 也就是说初始配置 命令可以与 RRC重配置信息合并。
第十一实施方式
[180] 下面描述第二成份载波的更新。如前所述，对于第二成份载波的更新， 包括添加所选择的新的第二成份载波，或者用所选择的新的第二成份载波 代替某一旧的第二成份载波。后一种情况事实上是添加动作和删除动作的 联合。类似于第八实施方式的考虑， 为了恰当地确定更新或者添加成份载 波的时机， 本实施方式提出了一种更新第二成份载波的方法。
[181] 如图 26所示， 本实施方式的方法包括： 获取终端、 基站和 /或第二成 份载波的状态信息（步骤 2202 )；确定所述状态信息是否符合预定条件（步 骤 2204 ); 在符合预定条件的情况下添加新的第二成份载波或者用新的第 二成份载波代替旧的第二成份载波（步骤 2206 )。
[182] 在现有技术中，可以有各种各样的参数表征终端、基站及其使用中的 成份载波和可使用的载波的性能、状态等等， 并可以通过各种测量或者通 信手段获取相关信息。针对这些信息，可以根据实际应用的需要设置各种 预定条件， 在满足预定条件的时候更新第二成份载波。
[183] 作为说明性的示例而非限制性的列举，所考虑的进行第二成份载波的 更新的条件可以包括下述条件中的至少一个：
[184] 1. 由于业务需要， 需要更多第二成份载波；
[185] 2. 终端移动到旧的第二成份载波的覆盖范围外；
[186] 3. 旧的第二成份载波信号质量下降；
[187] 4. 旧的第二成份载波上、 下行链路的物理资源数量不够；
[188] 5. 原基站对网络总体负载平衡以及用户间干扰等问题的考虑要求更 新第二成份载波；
[189] 6. 终端移动到新基站的覆盖范围内。
[190] 第二成份载波的更新采用重配置流程。 该重配置流程与结合图 18所 述的用于主成份载波的重配置流程类似。但是不同之处在于， 由于第二成 分载波没有唯一性，因此第二成分载波的更新的本盾如前所述在于添加新 的第二成份载波，因此第二成分载波更新所用的重配置流程不需要包括去 激活过程。
[191] 具体来说，在重配置流程中，基站向终端发送"无线资源控制 "（RRC , Radio Resource Control )重配置信息， 所述 "无线资源控制" 重配置信 息仅包括新的第二成份载波的无线资源配置信息 (RadioResourceConfig)。 然后终端利用所述新的主成份载波的无线资源配置信息来配置新的第二 成份载波。 由于无需重新配置 MAC、 PDCP和 RLC层和更新安全密钥， 因此能够降低由于第二成份载波更新带来的额外系统开销，避免带来用户 服务质量下降问题。 此时， 在 RRC消息体中并不需要包含新的第二成份 载波的所有相关配置信息 （例如不包含移动控制信息）， 而只需要包含与 第二成份载波的无线资源配置信息即可， 可以称之为增量信令。
[192] 同样地， 类似于第十实施方式， 在实际应用当中， 也存在新的第二成 份载波尚未初始配置， 或者虽已被初始配置但尚未被激活的场景。
[193] 在这种场景下，也要对拟作为新的第二成分载波的尚未初始配置的载 波或者已初始配置但尚未激活的载波进行激活（图 27、 28 )。 对于第二成 份载波而言，完成了本申请中所述的重配置，也就是完成了其初始配置（即 该载波的添加）。 对于激活过程， 在时间顺序上同样比较灵活。 如图 28 所示， 激活过程可以在基于 RRC重配置信息的配置完成之后， 由基站发 出激活命令。 或者， 如图 27所示， 激活过程也可以在发出 RRC重配置 信息之前由基站发送激活命令。
[194] 同样地， 激活命令可以与其它的命令合并或者同时发送。 例如， 激活 命令可以与所述 "无线资源控制" 重配置信息同时发送。
第十二实施方式
[195] 第八到第十实施方式所述的更新成份载波的方法在通信系统中由基 站和终端协同进行。
[196] 因此，在本实施方式中，提出了分别能够实现前述各种实施方式的终 端、 基站和通信系统。
[197] 在本实施方式以及后续各实施方式对终端、 基站和通信系统的描述 中， 除非必要， 不再重复叙述前述各实施方式已经详细描述的细节， 而可 参见前述各实施方式的描述。
[198] 如图 29所示， 一种载波汇聚通信网络中的基站 2420与终端 2520通 信，完成主成份载波的更新。具体来说，该终端包括：状态获取单元 2402， 获取终端、 基站和 /或主成份载波的状态信息； 状态确定单元 2404， 确定 所述状态信息是否符合预定条件； 以及主成份载波更新单元 2406， 在符 合预定条件的情况下用新的主成份载波代替旧的主成份载波。
[199] 具体来说，状态获取单元 2402是为了获取状态确定单元 2404据以确 定是否满足主成份载波更新条件的信息。需要获取哪些信息取决于所述更 新条件， 而更新条件是可以根据具体的应用来任意设定的。
[200] 例如， 所述预定条件包括下述条件中的至少一个：
[201] 1.终端移动到旧的主成份载波的覆盖范围外；
[202] 2.旧的主成份载波信号质量下降；
[203] 3.旧的主成份载波上、 下行链路的物理资源数量不够；
[204] 4.原基站对网络总体负载平衡以及用户间干扰等问题的考虑要求更 新主成份载波；
[205] 5.终端移动到新基站的覆盖范围内。
[206] 那么，对于第 1和第 5项条件，就需要基于终端位置和相应基站的主 成份载波的覆盖范围进行判断。对于第 2项条件， 需要从终端获取信号质 量信息。 对于第 3项条件， 需要从基站获得有关信息。 第 4项条件则完全 是来自基站的命令。
[207] 因此， 取决于所述预定条件具体为何， 状态获取单元 2402可能只需 从基站本身获取有关信息而无需与终端 2520交互， 也有可能需要与终端 2520 交互而获取有关信息。 至于信息的具体获取方式， 在前文关于成份 载波的选择的描述当中已经有所描述， 在此不再重复。
[208] 主成份载波更新单元 2406与终端 2502交互而完成主成份载波的更 新。 如前文所述， 所有的主成份载波更新都能够通过切换流程来完成。 因 此， 在一种实施方式当中， 如图 30所示， 所述主成份载波更新单元 2406 可以包括： 重配置信息发送单元 24062， 向终端发送 "无线资源控制" 重 配置信息， 所述 "无线资源控制" 重配置信息包括移动控制信息， 所述移 动控制信息包括用于由终端重新配置 MAC、 PDCP和 RLC层、 更新安 全密钥的信息， 以及由终端用来配置新的主成份载波的无线资源配置信 息； 以及随机接入单元 24064， 用于发起非竟争性随机接入或者对终端的 随机接入请求作出应答。
[209] 如前文所述，切换流程包括对旧的主成份载波的去激活，但是既可由 基站发出去激活命令，也可以由终端自身隐式去激活。釆用前一种方式时， 所述主成份载波更新单元 2406还可以包括去激活命令发送单元 24066， 用于将旧的主成份载波去激活，如图 30所示。但是当采用后一种方式时， 所述主成份载波更新单元 2406可以不包括去激活命令发送单元 24066。
[210] 与此相应， 本实施方式还提供了相应的终端 2520， 如图 30所示， 其 包括： 重配置信息接收单元 2502， 用于从基站接收 "无线资源控制" 重 配置信息； 移动控制配置单元 2504， 用于才艮据所述 "无线资源控制" 重 配置信息来重新配置 MAC、 PDCP和 RLC层， 更新安全密钥的信息； 无线资源配置单元 2506， 用于才艮据所述 "无线资源控制" 重配置信息中 所包含的无线资源配置信息来配置新的主成份载波； 随机接入单元 2510， 用于发起竟争性随机接入或者对基站发起的非竟争性随机接入作出应答； 以及去激活单元 2508， 用于按照预先设定或者根据基站发送的去激活命 令将旧的主成份载波去激活。
[211] 上述基站 2420和终端 2520适合完成所述切换流程。当完成如前文所 述的重配置流程时， 自然， 所述重配置信息发送单元 24062被配置为向终 端发送的 "无线资源控制"重配置信息仅包括所述新的主成份载波的无线 资源配置信息， 用于由终端 2520来配置新的主成份载波。 相应地， 终端 2520中并不需要移动控制配置单元 2504的功能。
[212] 如前所述， 重配置流程一般也没有随机接入过程， 因此适合完成重配 置流程的上述基站 2420和终端 2520中， 也都可以没有随机接入单元。但 是，如前所述，基站 2420和终端 2520也可以分别包含相应的随机接入单 元， 以便在新的主成份载波和旧的主成份载波不符合下列条件时，将旧的 主成份载波去激活之前随机接入新的主成份载波。这些条件是： 新旧主成 份载波位于相同的频段，具有相同的时间提前量，并且都与基站保持同步。
[213] 如前文所述，对于主成份载波的更新，优选的方式是视应用场景而定 恰当地选择切换流程或者重配置流程，因此基站和终端最好分别同时具备 处理切换流程和重配置流程的能力。 对于终端 2520而言， 从前文的说明 可以看到，切换流程要使用图 30中所示终端 2520的全部图示部件， 而重 配置流程仅使用其中部分部件。因此可以认为能够实现切换流程的终端也 能实现重配置流程。
[214] 然而， 由于 RRC重配置信息是由基站发送的， 是釆用切换流程还是 釆用重配置流程需要由基站决定。 因此， 如图 31所示， 在同时支持切换 流程和重配置流程的基站 2420中，所述状态确定单元 2404可以被进一步 配置为： 基于状态获取单元 2402获取的信息来判断新的主成份载波是否 与旧的主成份载波属于同一基站。 当然， 该判断也可以由基站 2420中的 任何部件来判断， 并将结果告知主成份载波更新单元 2406。 一般而言， 例如，基站本身知晓终端当前的主成份载波，而在选择主载波的过程当中， 要么由基站决策新的主成份载波，要么由终端决策新的主成份载波并告知 基站（例如向基站发出更新主成份载波的请求）， 因此基站能够基于上述 信息来判断新旧主成份载波是否属于同一基站。由于终端必然是向当前所 属基站（也就是旧的主成份载波所属基站）请求更新主成份载波， 因此基 站的上述判断也就是判断新的主成份载波是否该基站本身的载波。
[215] 相应地，所述重配置信息发送单元 24062可以被配置为在不同的情况 下发送不同的配置信息。也就是，在新的主成份载波与旧的主成份载波属 于同一基站的情况下， 向终端发送的 "无线资源控制"重配置信息仅包括 所述新的主成份载波的无线资源配置信息，用于由终端来配置新的主成份 载波； 在新的主成份载波与旧的主成份载波不属于同一基站的情况下， 所 述 "无线资源控制"重配置信息包括移动控制信息， 所述移动控制信息包 括用于由终端重新配置 MAC、 PDCP和 RLC层、 更新安全密钥的信息， 以及由终端用来配置新的主成份载波的无线资源配置信息。
[216] 另夕卜，在新旧主成份载波属于不同基站而釆用切换流程的情况下，如 前文所述， 终端 2520的随机接入单元 2510将与新基站 2420，的随机接入 单元 24064，交互， 而不是与旧基站 2420中的随机接入单元 24064交互， 如图 31所示。 在这种情况下， 新基站 2420，的随机接入单元 24064，和旧 基站 2420中的随机接入单元 24064可以是相同的部件， 只不过归属于不 同的基站实体； 它们也可以是不同的部件， 甚至旧基站 2420 和新基站 2420，也不一定完全相同。 但是在理想的状态下， 旧基站 2420 和新基站 2420，应当具有相同的构造，在图 31中为简明起见仅仅图示了新基站 2420， 的部分部件。 下文涉及的去激活单元的情况是类似的。
[217] 如果终端不是对旧的主成份载波釆用隐式去激活，则基站需要使用去 激活命令发送单元。类似于随机接入单元的情形，在新旧主成份载波属于 不同基站而釆用切换流程的情况下，去激活命令应当由新基站 2420，发出， 也就是说是由新基站 2420，的去激活命令发送单元 24066，与终端 2520的 去激活单元 2508交互， 如图 31所示。
[218] 此外，在新旧主成份载波属于不同基站而釆用切换流程的情况下， 由 于涉及不同的基站， 还涉及不同基站之间的交接。 因此， 所述基站还可以 包括切换请求单元 3102， 用于在新的主成份载波与旧的主成份载波不属 于同一基站的情况下， 向新的主成份载波所属基站发出切换请求，从新的 主成份载波所属基站获取有关信息，以便由重配置信息发送单元准备发送 给终端的 RRC重配置信息。 其详情在方法部分已述， 在此不再重复。
[219] 此外， 所述主成份载波更新单元还可以包括激活命令发送单元（未图 示）， 用于在新的主成份载波尚未被初始配置或者激活的情况下， 在所述 重配置信息发送单元发送 "无线资源控制"重配置信息之前、 与之同时或 者在终端利用所述 "无线资源控制"重配置信息进行配置之后发送激活命 令， 用以激活所述新的主成份载波。 另夕卜， 所述基站还可以包括初始配置 单元（未图示）， 用于在新的主成份载波尚未被初始配置的情况下， 向终 端发送初始配置 （添加）该主成份载波的命令。
[220] 相应地， 所述终端还可以包括主成份载波激活单元（未图示）， 用于 接收基站发送的激活命令， 激活新的主成份载波。 并还可以包括： 初始配 置单元（未图示）， 用于响应于基站的命令添加主成份载波。
[221] 自然， 如图 29、 30、 31所示， 上述描述也已公开了一种由上述终端 的各种实施方式与上述基站的各种实施方式构成的通信系统。
第十三实施方式
[222] 第十一实施方式所述的更新成份载波的方法在通信系统中由基站和 终端协同进行。
[223] 因此，在本实施方式中，提出了分别能够实现前述各种实施方式的终 端、 基站和通信系统。
[224] 在本实施方式以及后续各实施方式对终端、 基站和通信系统的描述 中， 除非必要， 不再重复叙述前述各实施方式已经详细描述的细节， 而可 参见前述各实施方式的描述。
[225] 如图 32所示， 一种载波汇聚通信网络中的基站 3000与终端 3020通 信， 完成第二成份载波的更新。 具体来说， 该终端包括： 状态获取单元 3002,获取终端、基站和 /或第二成份载波的状态信息；状态确定单元 3004， 确定所述状态信息是否符合预定条件； 以及第二成份载波更新单元 3006， 在符合预定条件的情况下添加新的第二成份载波或者用新的第二成份载 波代替旧的第二成份载波。
[226] 具体来说，状态获取单元 3002是为了获取状态确定单元 3004据以确 定是否满足第二成份载波更新条件的信息。需要获取哪些信息取决于所述 更新条件， 而更新条件是可以根据具体的应用来任意设定的。
[227] 例如， 所述预定条件包括下述条件中的至少一个：
[228] 1.由于业务需要， 需要更多第二成份载波；
[229] 2.终端移动到旧的第二成份载波的覆盖范围外；
[230] 3.旧的第二成份载波信号质量下降；
[231] 4.旧的第二成份载波上、 下行链路的物理资源数量不够；
[232] 5.原基站对网络总体负载平衡以及用户间干扰等问题的考虑要求更 新第二成份载波；
[233] 6.终端移动到新基站的覆盖范围内。
[234] 那么，对于第 2和第 6项条件，就需要基于终端位置和相应基站的主 成份载波的覆盖范围进行判断。对于第 3项条件， 需要从终端获取信号质 量信息。 对于第 4项条件， 需要从基站获得有关信息。 第 1、 5项条件则 完全是来自基站的命令。
[235] 因此， 取决于所述预定条件具体为何， 状态获取单元 3002可能只需 从基站本身获取有关信息而无需与终端 3020交互， 也有可能需要与终端 3020 交互而获取有关信息。 至于信息的具体获取方式， 在前文关于成份 载波的选择的描述当中已经有所描述， 在此不再重复。
[236] 第二成份载波更新单元 3006与终端 3002交互而完成第二成份载波的 更新。 在一种实施方式当中， 如图 33所示， 所述第二成份载波更新单元 3006可以包括：重配置信息发送单元 30062，向终端发送"无线资源控制" 重配置信息， 所述 "无线资源控制"重配置信息仅包括所述新的第二成份 载波的无线资源配置信息， 用于由终端来配置新的第二成份载波。
[237] 与此相应， 本实施方式还提供了相应的终端 3020， 如图 33所示， 其 包括： 重配置信息接收单元 3022， 用于从基站接收 "无线资源控制" 重 配置信息； 无线资源配置单元 3024， 用于才艮据所述 "无线资源控制" 重 配置信息中所包含的无线资源配置信息来配置新的第二成份载波。
[238] 此外， 所述第二成份载波更新单元还可以包括激活命令发送单元 30066， 用于在添加新的第二成份载波或者用新的第二成份载波代替旧的 第二成份载波之后， 发送激活命令， 用以激活该新的第二成份载波； 或者 在新的第二成份载波尚未被初始配置或者激活的情况下，在所述重配置信 息发送单元发送 "无线资源控制"重配置信息之前或者与之同时发送激活 命令， 用以激活所述新的第二成份载波。
[239] 相应地， 所述终端还可以包括第二成份载波激活单元 3028， 用于接 收基站发送的激活命令， 激活第二成份载波。
[240] 自然， 如图 32、 33所示， 上述描述也已公开了一种由上述终端的各 种实施方式与上述基站的各种实施方式构成的通信系统。
[241] 上面对本申请的一些实施方式进行了详细的描述。如本领域的普通技 术人员所能理解的， 本发明的方法和装置的全部或者任何步骤或者部件， 可以在包括处理器、存储介质等的任何计算设备 (包括通信设备）或者计 算设备的网络（包括通信网络）中， 以硬件、 固件、 软件或者它们的组合 加以实现，这是本领域普通技术人员在了解本发明的内容的情况下运用他 们的基本编程技能就能实现的， 因此不需在此具体说明。
Figure imgf000033_0001
接口和控制程序。 总而言之， 计算机、 计算机系统或者计算机网络中的相 关硬件、 软件和实现本发明的前述方法中的各种操作的硬件、 固件、软件 或者它们的组合， 即构成本发明的设备及其各组成部件。
[243] 因此，基于上述理解，本发明的目的还可以通过在任何信息处理设备 上运行一个程序或者一组程序来实现。所述信息处理设备可以是公知的通 用设备。 因此，本发明的目的也可以仅仅通过提供包含实现所述方法或者 设备的程序代码的程序产品来实现。也就是说，这样的程序产品也构成本 发明， 并且存储有这样的程序产品的存储介盾也构成本发明。 显然， 所述 存储介质可以是本领域技术人员已知的，或者将来所开发出来的任何类型 的存储介盾， 包括但不限于软盘、 光盘、 磁光盘、 存储卡、 存储棒等等。
[244] 在本发明的设备和方法中， 显然， 各部件或各步骤是可以分解、 组合 和 /或分解后重新组合的。 这些分解和 /或重新组合应视为本发明的等效方 案。
[245] 还需要指出的是，执行上述系列处理的步骤可以自然地按照说明的顺 序按时间顺序执行，但是并不需要一定按照时间顺序执行。 某些步骤可以 并行或彼此独立地执行。
[246] 另外， 虽然上面是一个实施方式一个实施方式地进行描述，但应当理 解各个实施方式并不是孤立的。 本领域技术人员在阅读了本申请文件之 后，显然能够理解，各实施方式所包含的各种技术特征在各种实施方式之 间是可以任意组合的， 只要它们之间没有冲突即可。 当然， 在同一实施方 式中提及的所有技术特征相互之间也是可以任意组合的，只要它们相互之 间没有冲突即可。
[247] 最后， 术语 "包括"、 "包含"或者其任何其他变体意在涵盖非排他性 的包含， 从而使得包括一系列要素的过程、 方法、 物品或者设备不仅包括 那些要素， 而且还包括没有明确列出的其他要素，或者是还包括为这种过 程、方法、物品或者设备所固有的要素。此外，在没有更多限制的情况下， 由语句 "包括一个 ... ... " 限定的要素， 并不排除在包括所述要素的过程、 方法、 物品或者设备中还存在另外的相同要素。
[248] 虽然已经结合附图详细说明了本发明的实施方式及其优点，但是应当 理解， 上面所描述的实施方式只是用于说明本发明， 而并不构成对本发明 的限制。对于本领域的技术人员来说，可以对上述实施方式作出各种修改 和变更而不背离本发明的实质和范围。 因此，本发明范围仅由所附的权利 要求及其等效含义来限定，在不超出由所附的权利要求所限定的本发明的 精神和范围的情况下可以进行各种改变、 替代和变换。

Claims

权利 要求 书
1. 一种在载波汇聚通信网络中选择成份载波的方法， 包括：
确定终端能够使用的各可用载波的覆盖范围；
确定各可用载波的覆盖范围的分布是否符合预定分布模式；
在符合所述预定分布模式的情况下，至少根据所述预定分布模式所决 定的准则确定要使用的成份载波。
2. 如权利要求 1所述的方法， 其中， 所述预定分布模式为： 各可用载波 的覆盖范围基本相同；所述准则包括：将各可用载波均作为候选成份载波。
3. 如权利要求 1所述的方法， 其中， 所述预定分布模式为： 至少一个可 用载波的覆盖范围 «本上包含在至少另一个可用载波的覆盖范围之内； 所述准则包括： 至少根据各可用载波的覆盖范围的大小确定候选成份载 波。
4. 如权利要求 1所述的方法， 其中， 所述预定分布模式为： 至少两个可 用载波的覆盖范围基本上不重合也不包含，而是相互交迭；所述准则包括： 至少才艮据终端所处位置及其移动方向和移动速率确定候选成份载波。
5. 如权利要求 4所述的方法， 其中， 至少根据终端所处位置及其移动方 向和移动速率确定候选成份载波包括：
如果终端位于某一可用载波边缘并且正在快速远离该可用载波， 则赋 予远离方向所对应的可用载波较高的成为候选成份载波的概率；
如果终端位于某一可用载波的边缘并且朝向该可用载波内部移动， 或 者如果终端在交迭区域中远离交迭区域边缘的位置，则至少根据各可用载 波的覆盖范围的大小确定候选成份载波。
6. 如权利要求 5所述的方法， 其中， 如果所述远离方向所对应的可用载 波有多个，则至少根据各可用载波的覆盖范围的大小在这多个可用载波中 确定候选成份载波。
7. 如权利要求 2或 3所述的方法， 其中， 所述准则还包括考虑以下因素 中的至少一个： 信号质量、 上行和下行链路的物理资源数量、 干扰大小和 负载状况。
8. 如权利要求 7所述的方法， 其中， 在确定候选成份载波时， 覆盖范围 的重要性高于信号质量、上行和下行链路的物理资源数量的重要性，信号 质量、上行和下行链路的物理资源数量的重要性高于干扰大小和负载状况 的重要性； 或者，覆盖范围、信号盾量、上行和下行链路的物理资源数量、 干扰大小和负载状况中的任何一个因素单独地确定候选成份载波，或者其 中的多个因素共同地确定候选成份载波。
9. 如权利要求 4所述的方法， 其中， 所述准则还包括考虑以下因素中的 至少一个： 信号质量、 上行和下行链路的物理资源数量、 干扰大小和负载 状况。
10. 如权利要求 9所述的方法， 其中， 在确定候选成份载波时， 终端所处 位置及其移动方向和移动速率的重要性高于信号质量、上行和下行链路的 物理资源数量的重要性，信号质量、上行和下行链路的物理资源数量的重 要性高于干扰大小和负载状况的重要性； 或者，终端所处位置及其移动方 向和移动速率、信号质量、 上行和下行链路的物理资源数量、 干扰大小和 负载状况中的任何一个因素单独地确定候选成份载波，或者其中的多个因 素共同地确定候选成份载波。
11. 如权利要求 5或 6所述的方法， 其中， 所述准则还包括考虑以下因素 中的至少一个： 信号质量、 上行和下行链路的物理资源数量、 干扰大小和 负载状况。
12. 如权利要求 11所述的方法， 其中， 在确定候选成份载波时， 覆盖范 围、终端所处位置及其移动方向和移动速率的重要性高于信号质量、上行 和下行链路的物理资源数量的重要性，信号盾量、上行和下行链路的物理 资源数量的重要性高于干扰大小和负载状况的重要性； 或者， 覆盖范围、 终端所处位置及其移动方向和移动速率、信号质量、上行和下行链路的物 理资源数量、干扰大小和负载状况中的任何一个因素单独地确定候选成份 载波， 或者其中的多个因素共同地确定候选成份载波。
13. 如权利要求 1 - 6之一所述的方法， 其中， 当各可用载波的覆盖范围 的分布包括至少两种预定模式时，先按照其中一种模式所对应的准则确定 候选成份载波，然后再按照另一模式所对应的准则在所述候选成份载波中 确定第二候选成份载波， 直到得到唯一的候选成份载波。
14. 如权利要求 1 - 6之一所述的方法， 还包括：
获取各可用载波的激活和配置状态， 其中，确定候选成份载波时还考虑各可用载波的激活和配置状态，其 中， 处于激活状态的可用载波的优先级高于已配置但未激活的可用载波， 已配置但未激活的可用载波的优先级高于未配置的可用载波。
15. 一种在载波汇聚通信网络中更新主成份载波的方法， 包括：
按照如权利要求 1 - 14之一所述的方法确定新的主成份载波； 从旧的主成份载波转到新的主成份载波。
16. 如权利要求 15所述的方法， 其中， 所述旧的主成份载波为初始主成 份载波， 即终端用于初始接入或者无线资源连接重建时所用的成份载波。
17. 如权利要求 15或 16所述的方法， 还包括：
获取各可用载波的频 i普信息，
其中，确定候选成份载波时还考虑各可用载波的频率与旧的主成份载 波的关系， 其中， 激活和配置状态相同的可用载波中， 与旧的主成份载波 位于同一频带内的可用载波具有更高的优先级。
18. 一种在载波汇聚通信网络中添加第二成份载波的方法， 包括：
按照如权利要求 1 - 14之一所述的方法确定新的第二成份载波； 添加所述新的第二成份载波。
19. 一种载波汇聚通信网络中的设备， 包括：
终端信息获取单元， 获取终端位置信息和 /或终端位置对应的载波分 布信息；
载波分布模式确定单元，确定终端所在位置所对应的各可用载波的覆 盖范围的分布是否符合预定分布模式；
成份载波确定单元，在终端所在位置所对应的各可用载波的覆盖范围 符合所述预定分布模式的情况下，至少根据所述预定分布模式所决定的准 则确定要使用的成份载波；
通知单元， 将所确定的要使用的成份载波通知给对方设备。
20. 如权利要求 19所述的设备， 其中， 所述预定分布模式为： 各可用载 波的覆盖范围基本相同；所述成份载波确定单元被配置为将各可用载波均 作为候选成份载波。
21. 如权利要求 19所述的设备， 其中， 所述预定分布模式为： 至少一个 可用载波的覆盖范围被基本上包含在至少另一个可用载波的覆盖范围之 内；所述成份载波确定单元被进一步配置为至少根据各可用载波的覆盖范 围的大小来确定候选成份载波。
22. 如权利要求 19所述的设备， 其中， 所述预定分布模式为： 至少两个 可用载波的覆盖范围基本上不重合也不包含， 而是相互交迭；
其中，所述终端信息获取单元被进一步配置为获取有关所述终端的移 动方向和移动速率的信息；
所述成份载波确定单元被进一步配置为至少根据所述终端所处位置 及其移动方向和移动速率来确定候选成份载波。
23. 如权利要求 22所述的设备， 其中， 所述成份载波确定单元被进一步 配置为：
如果终端位于某一可用载波边缘并且正在快速远离该可用载波， 则赋 予远离方向所对应的可用载波较高的成为候选成份载波的概率；
如果终端位于某一可用载波的边缘并且朝向该可用载波内部移动， 或 者如果终端在交迭区域中远离交迭区域边缘的位置，则至少根据各可用载 波的覆盖范围的大小确定候选成份载波。
24. 如权利要求 23所述的设备， 其中， 所述成份载波确定单元被进一步 配置为： 如果所述远离方向所对应的可用载波有多个， 则至少根据各可用 载波的覆盖范围的大小在这多个可用载波中确定候选成份载波。
25. 如权利要求 20或 21所述的设备， 其中， 所述成份载波确定单元被进 一步配置为还至少根据以下因素中的至少一个来确定候选成份载波：信号 质量、 上行和下行链路的物理资源数量、 干扰大小和负载状况。
26. 如权利要求 25所述的设备， 其中， 所述成份载波确定单元被进一步 配置为： 在确定候选成份载波时， 覆盖范围的重要性高于信号质量、 上行 和下行链路的物理资源数量的重要性，信号质量、上行和下行链路的物理 资源数量的重要性高于干扰大小和负载状况的重要性； 或者， 覆盖范围、 信号质量、上行和下行链路的物理资源数量、干扰大小和负载状况中的任 何一个因素单独地确定候选成份载波，或者其中的多个因素共同地确定候 选成份载波。
27. 如权利要求 22所述的设备， 其中， 所述成份载波确定单元被进一步 配置为还至少根据以下因素中的至少一个来确定候选成份载波： 信号质 量、 上行和下行链路的物理资源数量、 干扰大小和负载状况。
28. 如权利要求 27所述的设备， 其中， 所述成份载波确定单元被进一步 配置为： 在确定候选成份载波时， 终端所处位置及其移动方向和移动速率 的重要性高于信号质量、上行和下行链路的物理资源数量的重要性，信号 质量、上行和下行链路的物理资源数量的重要性高于干扰大小和负载状况 的重要性； 或者， 终端所处位置及其移动方向和移动速率、 信号质量、 上 行和下行链路的物理资源数量、干扰大小和负载状况中的任何一个因素单 独地确定候选成份载波， 或者其中的多个因素共同地确定候选成份载波。
29. 如权利要求 23或 24所述的设备， 其中， 所述成份载波确定单元被进 一步配置为还至少根据以下因素中的至少一个来确定候选成份载波：信号 质量、 上行和下行链路的物理资源数量、 干扰大小和负载状况。
30. 如权利要求 29所述的设备， 其中， 所述成份载波确定单元被进一步 配置为： 在确定候选成份载波时， 覆盖范围、 终端所处位置及其移动方向 和移动速率的重要性高于信号质量、上行和下行链路的物理资源数量的重 要性，信号质量、上行和下行链路的物理资源数量的重要性高于干扰大小 和负载状况的重要性； 或者， 覆盖范围、 终端所处位置及其移动方向和移 动速率、信号质量、 上行和下行链路的物理资源数量、 干扰大小和负载状 况中的任何一个因素单独地确定候选成份载波，或者其中的多个因素共同 地确定候选成份载波。
31. 如权利要求 19 - 24之一所述的设备， 其中， 所述成份载波确定单元 被进一步配置为：当各可用载波的覆盖范围的分布包括至少两种预定模式 时，先按照其中一种模式所对应的准则确定候选成份载波， 然后再按照另 一模式所对应的准则在所述候选成份载波中确定第二候选成份载波，直到 得到唯一的候选成份载波。
32. 如权利要求 19 - 24之一所述的设备， 还包括：
载波状态获取单元， 获取各可用载波的激活和配置状态，
其中， 所述成份载波确定单元被进一步配置为： 确定候选成份载波时 还考虑各可用载波的激活和配置状态，其中， 处于激活状态的可用载波的 优先级高于已配置但未激活的可用载波，已配置但未激活的可用载波的优 先级高于未配置的可用载波。
33. 如权利要求 19 - 24之一所述的设备， 其中， 所述成份载波为主成份 载波。
34. 如权利要求 33所述的设备， 其中， 所述成份载波确定单元被进一步 配置为：确定候选成份载波时还考虑各可用载波的频率与旧的主成份载波 的关系， 其中， 激活和配置状态相同的可用载波中， 与旧的主成份载波位 于同一频带内的可用载波具有更高的优先级。
35. 如权利要求 19 - 24之一所述的设备， 其中， 所述成份载波为第二成 份载波。
36. 一种载波汇聚网络中的基站， 其中， 所述基站为如权利要求 19-35之 一所述的设备， 其中， 所述对方设备为与所述基站通信的终端。
37. 一种通信系统， 包括如权利要求 36所述的基站和与之通信的终端。
38. 一种适于载波汇聚网络的终端， 其中， 所述终端为如权利要求 19-35 之一所述的设备， 其中， 所述对方设备为与所述终端通信的基站。
39. 一种通信系统， 包括如权利要求 38所述的终端和与之通信的基站。
PCT/CN2011/072406 2010-04-30 2011-04-02 选择成份载波的方法、基站、终端和通信系统 WO2011134337A1 (zh)

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