WO2011127767A1 - 感知导频信道支持的认知系统初始化方法、装置和系统 - Google Patents

感知导频信道支持的认知系统初始化方法、装置和系统 Download PDF

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Publication number
WO2011127767A1
WO2011127767A1 PCT/CN2011/071189 CN2011071189W WO2011127767A1 WO 2011127767 A1 WO2011127767 A1 WO 2011127767A1 CN 2011071189 W CN2011071189 W CN 2011071189W WO 2011127767 A1 WO2011127767 A1 WO 2011127767A1
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WO
WIPO (PCT)
Prior art keywords
terminal
base station
cpc
frequency point
working frequency
Prior art date
Application number
PCT/CN2011/071189
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English (en)
French (fr)
Inventor
龚磊
柳光
Original Assignee
华为技术有限公司
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.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to RU2012144280/07A priority Critical patent/RU2510597C1/ru
Priority to BR112012025368A priority patent/BR112012025368B1/pt
Priority to EP11768379.7A priority patent/EP2487977B1/en
Publication of WO2011127767A1 publication Critical patent/WO2011127767A1/zh
Priority to US13/495,661 priority patent/US8600428B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14Spectrum sharing arrangements between different networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453Resources in frequency domain, e.g. a carrier in FDMA
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/30Connection release

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a cognitive system initialization method, apparatus and system supported by a cognitive pilot channel.
  • the existing spectrum usage policy is fixed allocation, that is, the government allocates fixed resources for specific services of specific users, such as TV, radio, radar, navigation, etc., which use fixed frequency points, some of which are not always used. Not all geographical locations are in use, so there are certain time periods and some geographical locations, and some frequency points are not fully utilized, resulting in a great waste of spectrum resources.
  • cognitive radio (CR) technology can discover these unoccupied frequency bands that appear anywhere, anytime, and dynamically without disturbing the primary user (Primary User, PU originally fixed frequency user). Access to these frequency bands enables the use of slotted pins to increase spectrum utilization.
  • CR cognitive radio
  • CR technology needs to solve two problems: First, timely and accurate discovery of the spectrum blank period that occurs, and second, timely access to these frequencies in the blank period.
  • RRS Reconfigurable Radio Systems
  • Terminals can select access technologies and operators according to service requirements, with different access. The frequency of technology is changing anytime and anywhere.
  • the terminal search for specific access technology is time-consuming and power-consuming. Therefore, the RRS standard group proposes a cognitive pilot channel (Cognitive Pilot Channel, CPC).
  • CPC cognitive pilot channel
  • This channel can be carried on existing wireless access networks such as the Global System for Mobile Communications (GSM) network, or it can be carried in future wireless access networks.
  • GSM Global System for Mobile Communications
  • CPC Access Point CPC Access Point
  • CPC AP
  • CPC CPC Access Point
  • the CPC periodically broadcasts the spectrum usage status and service provision status of different areas. After the terminal is powered on, the terminal can quickly obtain the locally available spectrum and available services from the CPC AP.
  • the cognitive network under the CPC network architecture is a network established by the cognitive terminal and the base station, and the terminal and the base station need to perceive the wireless spectrum environment.
  • the terminal and the base station need to exchange the sensing information.
  • the working frequency and the broadcast channel are negotiated.
  • One function of the CPC AP is to assist the base station and the terminal to complete the interaction of the sensing information, the working frequency negotiation and the broadcast channel selection, and finally establish the cognitive system.
  • the terminal and base station power up and scan the CPC to obtain a set of available spectrum from the CPC AP, that is, a set of frequency points that are not registered for use in the CPC AP.
  • the terminal and the base station sense the set of available frequency points to complete the evaluation of each frequency point. Then, the base station sends a random access request to the CPC AP, obtains the sending resource of the next message, and establishes a bearer with the CPC AP.
  • the base station After the base station and the CPC AP establish a bearer, the base station sends a sensing message to the CPC AP, including the sensing result, the identity of the base station (Identity, ID), and the geographical location information.
  • the base station is required to support the positioning technology. For example: Global Positioning System (GPS)
  • the CPC After receiving the message from the base station, the CPC broadcasts the received sensing result on the CPC broadcast channel.
  • the terminal obtains information about all the base stations around it according to the broadcast information, and judges whether the base station is within its communication range according to the geographical location information, and can meet its service requirements. After evaluation, if it is desired to network with a certain base station, first Initiating a random access request to the CPC AP, obtaining a sending resource of the next message, and establishing a bearer with the CPC AP;
  • the terminal After the terminal establishes a bearer with the CPC AP, the terminal sends the spectrum sensing result, the target base station ID, and the like to the UE.
  • the CPC sends the sensing result of the terminal to the target base station according to the target base station ID;
  • the base station After receiving the sensing result of the terminal, the base station firstly fuses the sensing data to obtain a sensing decision.
  • the foregoing sensing decision includes: a working frequency point and a broadcast channel of the network where the base station is located, and the sensing is performed.
  • the decision result is sent to the CPC AP.
  • the CPC sends the above sensing decision to the terminal
  • the terminal If the terminal is not satisfied with the decision result, it continues to send the sensing message to the CPC AP, including the sensing result, the base station identifier, and the desired working frequency.
  • the CPC AP sends the terminal message to the base station, and the base station adjusts the sensing decision.
  • the acknowledgment message is sent to the base station and the CPC AP, and the CPC AP is removed from the bearer of the base station, and the bearer of the terminal is removed;
  • the terminal and the base station switch to the working frequency of the decision result to establish a path.
  • the ID may be a unique ID of the entire network and the value is large, so the complexity of the system implementation is increased.
  • the terminal knows the base station ID
  • the terminal and the base station do not know the mutual communication capability and range. Therefore, both the base station and the terminal must support the positioning technology.
  • the positioning technology such as GPS
  • the cost of the system is increased due to the high price of the GPS.
  • the technical problem to be solved by the embodiments of the present invention is to provide a cognitive system initialization method, apparatus and system supported by a perceptual pilot channel to reduce the complexity and cost of system implementation.
  • the cognitive system initialization method supported by the cognitive pilot channel provided by the present invention can be implemented by the following technical solutions:
  • the terminal receives the sensing information of the terminal on the CPC-specific resource, determining the working frequency point according to the sensing information of the terminal, and transmitting the working frequency of the determining to the terminal, where the sensing information of the terminal is the sensing information of the terminal and the sensing information of the base station.
  • the terminal sends on the channel indicated by the uplink access channel description information;
  • a link to the terminal is established at the working frequency of the decision.
  • a cognitive system initialization method supported by a cognitive pilot channel comprising:
  • the sensing information of the terminal is sent to the base station on the channel indicated by the uplink access channel description information, and the sensing information of the terminal is used to make the base station decide Working frequency point;
  • a base station comprising:
  • An initialization request sending unit configured to send a frequency point initialization request message to the CPC AP
  • an initialization response receiving unit configured to receive a frequency point initialization response message sent by the CPC AP, where the frequency point initialization response message includes CPC dedicated resource description information
  • a broadcast unit configured to broadcast the sensing information of the base station and the uplink access channel description information to the terminal on the channel indicated by the CPC dedicated resource description information;
  • the sensing information receiving unit is configured to receive the sensing information of the terminal on the CPC dedicated resource, where the sensing information of the terminal is that when the intersection of the sensing information of the terminal and the sensing information of the base station is not empty, the terminal accesses the uplink Transmitted on the channel indicated by the channel description information;
  • a working frequency point decision unit configured to determine a working frequency point according to the sensing information of the terminal
  • a working frequency point sending unit configured to send the working frequency of the decision to the terminal
  • a link establishing unit is configured to establish a link with the terminal at the working frequency of the decision.
  • a terminal comprising:
  • An initialization response receiving unit configured to receive a frequency point initialization response message broadcasted by the CPC AP, where the frequency point initialization response message includes CPC dedicated resource description information;
  • An information receiving unit configured to receive, by using the channel indicated by the CPC dedicated resource description information, the sensing information of the base station and the uplink access channel description information;
  • the sensing information sending unit is configured to: when the intersection of the sensing information of the terminal and the sensing information of the base station is non-empty, send the sensing information of the terminal to the base station on the channel indicated by the uplink access channel description information, where the terminal The sensing information is used to cause the base station to determine the working frequency point;
  • a working frequency point receiving unit configured to receive a working frequency point sent by the base station
  • a link establishing unit configured to establish a link with the base station at the working frequency point
  • a cognitive system supported by a cognitive pilot channel comprising:
  • a base station configured to send a frequency point initialization request message to the CPC AP, receive a frequency point initialization response message sent by the CPC AP, where the frequency point initialization response message includes CPC dedicated resource description information, and the channel indicated by the CPC dedicated resource description information
  • the uplink terminal broadcasts the sensing information of the base station and the uplink access channel description information; receives the sensing information of the terminal on the CPC dedicated resource, determines the working frequency according to the sensing information of the terminal, and sends the working frequency of the decision to the terminal; The working frequency of the decision establishes a link with the terminal;
  • a terminal configured to receive a frequency point initialization response message of the CPC AP broadcast, where the frequency point initialization response message includes CPC dedicated resource description information, and receive the base station's sensing information and uplink access on the channel indicated by the CPC dedicated resource description information.
  • Channel description information transmitting, on the channel indicated by the uplink access channel description information, the sensing information of the terminal to the base station; the intersection of the sensing information of the base station and the sensing information of the terminal is not empty; and the working frequency point sent by the receiving base station is The working frequency establishes a link with the base station.
  • the base station does not use the broadcaster ID to the terminal, avoids the use of the large-valued ID, and reduces the complexity of the system implementation;
  • the CPC AP allocates the area to the area where the base station is located.
  • the dedicated resources of the CPC, the base station does not need to be located, and the terminal does not need to judge the geographical location of the base station, and does not need to introduce a positioning technology, thereby reducing the cost of the system.
  • FIG. 1 is a schematic flow chart of a method according to an embodiment of the present invention.
  • FIG. 2 is a schematic flowchart of a method according to Embodiment 2 of the present invention.
  • FIG. 3 is a schematic flowchart of a method according to Embodiment 3 of the present invention.
  • FIG. 4 is a schematic flow chart of a method according to Embodiment 4 of the present invention.
  • FIG. 5 is a schematic structural diagram of a four-network according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a base station according to Embodiment 5 of the present invention.
  • FIG. 7 is a schematic structural diagram of a base station according to Embodiment 5 of the present invention.
  • FIG. 8 is a schematic structural diagram of a base station according to Embodiment 5 of the present invention.
  • FIG. 9 is a schematic structural diagram of a base station according to Embodiment 5 of the present invention.
  • FIG. 10 is a schematic structural diagram of a CPC AP according to Embodiment 5 of the present invention.
  • FIG. 11 is a schematic structural diagram of a CPC AP according to Embodiment 5 of the present invention.
  • FIG. 12 is a schematic structural diagram of a terminal according to Embodiment 7 of the present invention.
  • FIG. 13 is a schematic structural diagram of a terminal according to Embodiment 7 of the present invention.
  • FIG. 14 is a schematic structural diagram of a terminal according to Embodiment 7 of the present invention.
  • FIG. 15 is a schematic structural diagram of a terminal according to Embodiment 7 of the present invention.
  • FIG. 16 is a schematic structural diagram of a system according to Embodiment 8 of the present invention.
  • Embodiment 1 As shown in FIG. 1 , an embodiment of the present invention provides a method for initializing a cognitive system supported by a cognitive pilot channel, including:
  • the 104 Receive the sensing information of the terminal on the CPC dedicated resource, determine a working frequency point according to the sensing information of the terminal, and send the working frequency of the determining to the terminal; the sensing information of the terminal is the sensing information of the terminal and the sensing information of the base station. When the intersection is not empty, the terminal transmits on the channel indicated by the uplink access channel description information.
  • step 104 for each terminal, the terminal indicated by the uplink access channel description information is sent by the terminal.
  • the uplink access channel that sends the terminal sensing information belongs to the channel indicated by the CPC dedicated resource description information.
  • the terminal sends the sensing information of the terminal to the base station on the channel indicated by the uplink access channel description information.
  • each terminal transmits terminal sensing information on the channel (i.e., the uplink access channel) of each terminal indicated by the uplink access channel description information.
  • the base station receives the sensing information sent by the terminals from the above-mentioned CPC dedicated resources.
  • the sensing information of the terminal includes information such as a spectrum set available on the network side and a transmission power of the network side device.
  • the terminal may be dissatisfied with the current decision result, and further negotiate the working frequency.
  • the resources of the channel indicated by the CPC dedicated resource description information are released.
  • the above solutions release resources in a timely manner, which can improve the utilization of resources.
  • the receiving terminal before receiving the sensing information of the terminal, obtains a random access request, and if the resource amount of the terminal random access request exceeds the CPC dedicated resource quantity indicated by the CPC dedicated resource description information, sends a resource request to the CPC AP.
  • the message is sent to the terminal by the resource information received by the CPC AP.
  • receiving a negotiation request sent by the terminal where the negotiation request carries a working frequency point desired by the terminal; determining a new working frequency point according to the working frequency point expected by the terminal, and transmitting a new working frequency point to the terminal; Establishing a link with the terminal at the working frequency of the decision includes: Establishing a link with the terminal at the above new working frequency.
  • the above solution proposes a negotiation method in which the working frequency of the base station decision does not satisfy the service requirement of the terminal, and the working frequency of the decision does not satisfy the service requirement of the terminal.
  • the channel quality of the working frequency is found according to the measurement of the environment by the terminal.
  • the service requirements are not met, or the throughput of the working frequency does not meet the service requirements.
  • the method for obtaining the working frequency of the terminal may be: The terminal selects a working frequency point that satisfies the service requirement from the set of channels that it perceives as the working frequency of the terminal according to the service requirement (throughput, delay, etc.).
  • the new working frequency of the base station decision may be: after the base station receives the negotiation request of the terminal, The working frequency point is selected as the new working frequency point from the intersection of the available working frequency point set and the terminal's desired working frequency point. It should be noted that the working frequency point expected by the terminal may be a set, and is not limited to only one working frequency point.
  • the executor of the foregoing embodiment may be a base station.
  • This embodiment avoids the base station to the terminal broadcaster ID, avoids the use of the large-valued ID, and reduces the complexity of the system implementation.
  • the CPC AP allocates the area to the area where the base station is located.
  • the CPC-specific resources, the base station does not need to be located, and the terminal does not need to judge the geographical location of the base station, and does not need to introduce positioning technology, which reduces the implementation complexity and cost of the system; in addition, the terminal no longer needs the geographical location of the base station. Judging, reducing the complexity of selecting a suitable base station; Finally, the terminal and the base station do not need a CPC AP to relay a large number of messages, saving CPC channel resources.
  • Embodiment 2 As shown in FIG. 2, an embodiment of the present invention further provides another cognitive system initialization method supported by a cognitive pilot channel, including:
  • the frequency point initialization response message includes CPC dedicated resource description information, and broadcast the frequency point initialization response message to the terminal.
  • the CPC resource is re-allocated according to the resource request message, and then the resource information of the allocated CPC is sent to the base station and the terminal.
  • the above CPC-specific resources may also be periodically allocated to the cognitive system by the CPC AP without receiving an initialization request.
  • the above-mentioned allocated CPC dedicated resources are also allocated to other base stations outside the coverage of the above base station. In this way, CPC resources can be reused to improve CPC resource utilization.
  • the executor of the foregoing embodiment may be a CPC AP.
  • a dedicated CPC resource is allocated to the base station and the terminal, and the terminal directly communicates with the base station and does not communicate through the CPC AP, thereby saving channel resources between the base station and the CPC AP. It is no longer necessary to broadcast its own ID, which avoids the trouble of using a large ID.
  • the base station does not need to perform positioning, thereby saving the problem of introducing difficulty in introducing positioning technology.
  • the terminal and the base station do not need CPC AP relay. A large number of messages saves CPC channel resources.
  • Embodiment 3 As shown in FIG. 3, an embodiment of the present invention further provides another cognitive system initialization method supported by a cognitive pilot channel, including:
  • the method further includes:
  • the sending, by the foregoing 303, the sensing information of the terminal to the base station on the channel indicated by the uplink access channel description information includes:
  • the processing manner in the case that the CPC-specific resources that the CPC AP may allocate is insufficient, the flexibility of resource allocation is improved, and the solution of the embodiment is more adapted to the needs of actual use.
  • the method before sending the sensing information of the terminal, the method further includes:
  • the base station determines whether the base station meets the service requirement of the terminal according to the signal strength of the base station, and if yes, performs the sensing information of the transmitting terminal.
  • a specific example of the terminal selecting the base station is given. It is to be understood that the selection of the base station may be performed in other manners, which is not limited in the embodiment of the present invention.
  • the method further includes: detecting whether the working frequency point meets a service requirement of the terminal, and if not, sending a negotiation request to the base station, where the negotiation request carries a working frequency point desired by the terminal;
  • the working frequency point; establishing the link with the base station at the above working frequency point includes: establishing a link with the base station at the new working frequency point.
  • the executor of the foregoing embodiment may be a terminal.
  • the terminal obtains the dedicated resource of the CPC allocated by the CPC AP, and the terminal communicates with the base station without communication through the CPC AP, thereby saving the channel between the base station and the CPC AP. Resources; in addition, the terminal does not need to be positioned, thus reducing the introduction The problem of promotion difficulties caused by positioning technology.
  • Embodiment 4 This embodiment provides a specific example for explaining the entire networking process of the CPC system. As shown in FIG. 4, the specific process includes:
  • the terminal and the base station are powered on and scan the CPC channel to obtain an available spectrum set.
  • the available spectrum set is a set of frequency points that are not used in the CPC registration, and the terminal and the base station can select an appropriate frequency point to work therein;
  • the terminal and the base station perform spectrum sensing, perform sensing in the set of available frequency points given by the CPC, complete evaluation of each frequency point, and then the base station sends a random access request to the CPC AP to obtain a sending resource of the next message, and The CPC establishes a bearer;
  • the base station After the base station establishes a bearer with the CPC AP, the base station sends a frequency point initialization request message to the CPC AP.
  • the CPC AP After receiving the frequency initialization request message, the CPC AP allocates dedicated resources in the CPC resource for establishment of the cognitive system, and the dedicated resource can be used for establishment of other small-scale coverage cognitive systems;
  • the resource description information is sent to the base station and the terminal, and the foregoing sending manner may be broadcast;
  • the CPC AP since the CPC AP supports a wide range of coverage, it may be hundreds of kilometers, and various types of cells may be included under it.
  • the cognitive network exists in a small area, and may only be several tens of meters, such as a home and a conference place.
  • a base station only supports terminal access of a home or a conference room.
  • the terminal and the base station negotiate the working frequency point by sensing the surrounding environment; since the cognitive network only covers in a small area, and the CPC network covers the network extensively,
  • the dedicated resources allocated to the cognitive system can be multiplexed without the cognitive networks interfering with each other.
  • the dedicated resources of the cognitive system are allocated by the CPC AP to the network of three cognitive radios (Cognitive Radio, CR) within the CPC coverage.
  • the base station After obtaining the dedicated channel allocated by the CPC, the base station releases the link, removes the bearer in the 402 from the CPC AP, and broadcasts on the dedicated channel, where the broadcast content includes the base station's sensing information and the uplink access channel description information.
  • the terminal may determine, according to the signal strength, whether the base station can meet the service requirement, and select a base station that satisfies the terminal service according to the sensing information of the terminal and the sensing information of the base station.
  • the intersection of the sensing information of the base station may not be empty, if it is empty, it means that the same available channel is not perceived, and the uplink access description information is read, according to the above Sending a random access request to the base station by the location of the random access resource;
  • the base station receives the random access request of the multiple users, and determines whether the dedicated channel resource needs to be adjusted according to the number of the cognitive users.
  • the specific determining manner may be determining whether the CPC dedicated resource is greater than or equal to the resource requested by multiple users. If the dedicated channel resource does not need to be adjusted, the user may enter the 408. If no, the resource request is sent to the CPC AP, and the resource is sent to the terminal, and the obtained resource information is sent to the terminal, and the resource is reported to the terminal.
  • the base station allocates the resource reported by the sensing result to the terminal, that is, the uplink access channel, and the information of the uplink access channel may be carried by the uplink access channel description information.
  • the terminal reports the sensing information to the base station on the resource; the channel resource indicated by the uplink access channel information belongs to the channel indicated by the CPC dedicated resource, and the base station sends the sensing information and the uplink access channel description information, and
  • the terminal receives the above information sent by the base station using the channel indicated by the CPC dedicated resource; and the terminal transmits the information to the base station, and uses the channel resource allocated by the base station for the terminal, that is, the channel indicated by the uplink access channel description information.
  • the base station After receiving the sensing information of the terminal, the base station combines the sensing result, determines the working frequency, and broadcasts the decision result;
  • the terminal After obtaining the information about the working frequency of the broadcast, the terminal determines whether it is the most reasonable working frequency. If it is not possible to continue to send a message to the base station, including the expected working frequency of the terminal, finally reach the same as the base station, and then switch to the above.
  • Working frequency establishing a link with the base station; thereby completing the cognitive network networking;
  • the base station sends a request to the CPC AP to release the CPC dedicated resource.
  • a dedicated CPC resource is allocated to the base station and the terminal, and the terminal directly communicates with the base station and does not communicate through the CPC AP, thereby saving channel resources between the base station and the CPC AP; and avoiding the base station to the terminal broadcaster ID, avoiding large
  • the use of the numerical ID reduces the complexity of the system implementation; since the CPC AP allocates the CPC-specific resources of the area to the area where the base station is located, the base station does not need to perform positioning, and the terminal does not need to judge the geographical location of the base station, and does not need to The introduction of positioning technology reduces the implementation complexity and cost of the system; the terminal no longer needs to judge the geographical location of the base station, which reduces the complexity of selecting a suitable base station.
  • Embodiment 5 As shown in FIG. 6, an embodiment of the present invention provides a base station, including:
  • An initialization request sending unit 601 configured to send a frequency point initialization request message to the CPC AP;
  • the initialization response receiving unit 602 is configured to receive a frequency point initialization response message sent by the CPC AP, where the frequency point initialization response message includes CPC dedicated resource description information;
  • the broadcasting unit 603 is configured to: broadcast, on the channel indicated by the CPC dedicated resource description information, the sensing information and the uplink access channel description information of the base station to the terminal;
  • the sensing information receiving unit 604 is configured to receive the sensing information of the terminal on the CPC dedicated resource, where the sensing information of the terminal is that when the intersection of the sensing information of the terminal and the sensing information of the base station is not empty, the terminal describes the uplink access channel. Sent on the channel indicated by the information;
  • the working frequency point decision unit 605 is configured to determine a working frequency point according to the sensing information of the terminal, and the working frequency point sending unit 606 is configured to send the working frequency of the determining to the terminal;
  • the link establishing unit 607 is configured to establish a link with the terminal at the working frequency of the above decision.
  • the foregoing base station further includes:
  • the releasing unit 701 is configured to release the resources of the channel indicated by the CPC dedicated resource description information after the decision frequency is completed.
  • the foregoing base station further includes:
  • a random access request receiving unit 801 configured to receive a random access request of the terminal
  • the resource request sending unit 802 is configured to: if the resource amount of the terminal random access request exceeds the CPC dedicated resource quantity indicated by the foregoing CPC dedicated resource description information, send a resource request message to the CPC AP; the resource information sending unit 803 is configured to receive The resource information returned to the CPC AP is sent to the terminal.
  • the foregoing base station further includes:
  • the negotiation request receiving unit 901 is configured to receive a negotiation request sent by the terminal, where the negotiation request carries a working frequency point desired by the terminal;
  • the working frequency decision unit 605 is further configured to determine a new working frequency point according to the working frequency point expected by the terminal;
  • the working frequency transmitting unit 606 is further configured to send a new working frequency point to the terminal.
  • the link establishing unit 607 is configured to establish a link with the terminal at the new working frequency point.
  • the base station in this embodiment does not need to broadcast its own ID, which avoids the trouble of using a large ID.
  • the base station does not need to perform positioning, thereby saving the problem of introducing the positioning technology, and again, the terminal no longer needs to The geographical location of the base station is judged, which reduces the complexity of selecting a suitable base station.
  • Embodiment 6 As shown in FIG.
  • an embodiment of the present invention further provides a CPC AP, including: an initialization request receiving unit 1001, configured to receive a frequency point initialization request message sent by a base station; and a dedicated resource allocation unit 1002, configured to After receiving the frequency point initialization request message sent by the base station, allocating the CPC dedicated resource to the base station;
  • a CPC AP including: an initialization request receiving unit 1001, configured to receive a frequency point initialization request message sent by a base station; and a dedicated resource allocation unit 1002, configured to After receiving the frequency point initialization request message sent by the base station, allocating the CPC dedicated resource to the base station;
  • the initialization response sending unit 1003 is configured to send a frequency point initialization response message to the base station, where the frequency point initialization response message includes CPC dedicated resource description information;
  • the broadcasting unit 1004 is configured to broadcast the foregoing frequency point initialization response message to the terminal.
  • the dedicated resource allocation unit 1002 is further configured to: when receiving the resource request message sent by the base station, reallocating the CPC resource according to the resource request message;
  • the method further includes: a resource information sending unit 1101, configured to send resource information of the allocated CPC to the base station and the terminal.
  • a dedicated CPC resource is allocated to the base station and the terminal, and the terminal communicates with the base station without communication through the CPC AP, which saves channel resources between the base station and the CPC AP.
  • the base station does not need to broadcast its own ID, thereby avoiding The trouble of using a large ID is solved; again, the base station does not need to perform positioning, thereby saving the problem of the promotion difficulty brought by the introduction of the positioning technology; finally, the terminal and the base station do not need the CPC AP to relay a large number of messages, thereby saving CPC channel resources.
  • Embodiment 7 As shown in FIG.
  • an embodiment of the present invention further provides a terminal, including: an initialization response receiving unit 1201, configured to receive a frequency point initialization response message broadcasted by a CPC AP, where the frequency point initialization response message includes a CPC.
  • a terminal including: an initialization response receiving unit 1201, configured to receive a frequency point initialization response message broadcasted by a CPC AP, where the frequency point initialization response message includes a CPC.
  • the information receiving unit 1202 is configured to receive the sensing information of the base station and the uplink access channel description information on the channel indicated by the CPC dedicated resource description information.
  • the sensing information sending unit 1203 is configured to: when the intersection of the sensing information of the terminal and the sensing information of the base station is non-empty, send the sensing information of the terminal to the base station on the channel indicated by the uplink access channel description information, and the sensing of the terminal Information is used to enable the base station to determine the operating frequency point;
  • the working frequency point receiving unit 1204 is configured to receive a working frequency point sent by the base station;
  • the link establishing unit 1205 is configured to establish a link with the base station at the working frequency point.
  • the foregoing terminal further includes:
  • the random access request sending unit 1301 is configured to send a random access request message to the base station;
  • the resource information receiving unit 1302 is configured to receive resource information.
  • the sensing information sending unit 1203 is configured to send, according to the uplink access channel description information, the sensing information of the terminal to the base station on the channel indicated by the resource information.
  • the foregoing terminal further includes:
  • the determining unit 1401 is configured to determine, according to the signal strength of the base station, whether the base station meets a service requirement of the terminal;
  • the above-described sensing information transmitting unit 1203 is configured to execute the sensing information of the transmitting terminal when the determining unit 1401 determines that it is satisfied.
  • the foregoing terminal further includes:
  • the detecting unit 1501 is configured to detect whether the working frequency point meets the service requirement of the terminal, and the negotiation request sending unit 1502 is configured to send a negotiation request to the base station if the detection result of the detecting unit 1501 is not satisfied, where the negotiation request carries the terminal expectation Working frequency
  • the working frequency receiving unit 1204 is further configured to receive a new working frequency point sent by the base station; and the link establishing unit 1205 is configured to establish a link with the base station at the new working frequency point.
  • Embodiment 8 As shown in FIG. 16, the embodiment of the present invention further provides a cognitive system supported by a cognitive pilot channel, including:
  • the base station 1601 is configured to send a frequency point initialization request message to the CPC AP (1602), and receive a frequency point initialization response message sent by the CPC AP (1602), where the frequency point initialization response message includes CPC dedicated resource description information;
  • the channel indicated by the description information broadcasts the sensing information of the base station 1601 and the uplink access channel description information to the terminal 1603.
  • the sensing information of the receiving terminal 1603 is determined according to the sensing information of the terminal 1603, and the working frequency of the decision is transmitted to the terminal. 1603; establishing a link with the terminal 1603 at the working frequency of the above decision;
  • the terminal 1603 is configured to receive a frequency point initialization response message broadcasted by the CPC AP (1602), where the frequency point initialization response message includes CPC dedicated resource description information, and receive the sensing information of the base station 1601 on the channel indicated by the CPC dedicated resource description information.
  • Uplink access channel description information transmitting the sensing information of the terminal 1603 to the base station 1601 on the channel indicated by the uplink access channel description information; the intersection of the sensing information of the base station 1601 and the sensing information of the terminal 1603 is non-empty; the receiving base station 1601 sends
  • the working frequency point establishes a link with the base station 1601 at the above working frequency.
  • the foregoing base station 1601 is further configured to: before receiving the sensing information of the terminal 1603, Receiving the random access request of the terminal 1603, if the resource amount of the random access request of the terminal 1603 exceeds the CPC dedicated resource indicated by the CPC dedicated resource description information, sending a resource request message to the CPC AP (1602), and receiving the CPC The resource information returned by the AP (1602) is sent to the terminal 1603;
  • the terminal 1603 is further configured to: before transmitting the sensing information of the terminal 1603, send a random access request message to the base station 1601, and receive the resource information; and send the sensing of the terminal 1603 to the base station 1601 on the channel indicated by the uplink access channel description information.
  • the information includes: transmitting, by the uplink access channel description information, the sensing information of the terminal 1603 to the base station 1601 on the channel indicated by the resource information.
  • the base station 1601 is further configured to receive a negotiation request sent by the terminal 1603 before establishing a link with the terminal 1603 at the working frequency of the decision, where the negotiation request carries a working frequency point expected by the terminal 1603;
  • the working frequency determines a new working frequency, and sends a new working frequency to the terminal 1603; then the establishing the link with the terminal 1603 at the working frequency of the decision includes: establishing and terminal at the new working frequency a link to 1603;
  • the terminal 1603 is further configured to detect whether the working frequency point satisfies the service requirement of the terminal 1603 before establishing the link with the base station 1601, and if not, send a negotiation request to the base station 1601, where the negotiation request carries The desired working frequency point of the terminal 1603; the new working frequency point sent by the receiving base station 1601; establishing the link with the base station 1601 at the working frequency point includes: establishing a link with the base station 1601 at the new working frequency point.
  • a dedicated CPC resource is allocated to the base station and the terminal, and the terminal directly communicates with the base station, and no longer communicates through the CPC AP, which saves channel resources of the CPC, and the dedicated CPC resource can be reused in different geographical locations, thereby avoiding the base station and the base station.
  • the terminal frequently occupies the CPC resources and saves the channel resources of the CPC.
  • the base station does not need to broadcast its own ID, which avoids the trouble of using a large ID. Again, the base station does not need to perform positioning, thereby saving the introduction of positioning technology. Promote difficult issues. The terminal no longer needs to judge the geographical location of the base station, which reduces the complexity of selecting a suitable base station.

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Description

感知导频信道支持的认知系统初始化方法、 装置和系统 本申请要求于 2010年 4月 16日提交中国专利局, 申请号为 201010150099.5, 发明名称为"感知导频信道支持的认知系统初始化方法、装置和系统"的中国专 利申请的优先权, 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及通信技术领域,特别涉及一种感知导频信道支持的认知系统初 始化方法, 装置和系统。
背景技术
现有的频谱使用政策是固定分配的,即政府为特定用户的特定业务分配固 定的资源, 如电视、 广播、 雷达、 导航等都使用固定的频点, 其中一些频点并 不是一直使用,也不是所有地理位置都在使用, 因而存在某些时间段和某些地 理位置, 部分频点未得到充分使用的状况, 造成了频谱资源的极大浪费。 认知 无线电 (CR, Cognitive Radio )技术通过感知无线频谱环境, 可以发现这些随 时随地出现的未占用频段, 并在不干扰主用户 ( Primary User, PU原固定分配 的频率使用用户)的前提下动态接入这些频段, 实现见缝插针式的使用从而提 高频谱利用率。 基于目前频谱资源的紧张状况, 以及 CR技术具有提高频谱利 用率的性能, 世界各大标准协会正努力将 CR技术推向标准化。
CR技术的使用需要解决两个问题: 一、 及时准确发现出现的频谱空白期, 二、及时接入这些处于空白期的频普。另夕卜,可重配无线电系统( Reconfigurable Radio Systems , RRS )描述未来的无线通信环境中存在各种各样的无线技术和 服务, 终端可以根据服务需求选择接入技术和运营商, 不同接入技术的工作频 点随时随地都在变化,在此复杂的网络环境中, 终端搜索具体的接入技术既费 时又费电, 因此 RRS标准组提出了感知导频信道 ( Cognitive Pilot Channel, CPC ), 此信道既可以承载于现有的无线接入网络比如全球移动通讯系统 ( Global System for Mobile Communications , GSM ) 网洛, 也可以承载于未来 的无线接入网络。 无论承载于哪种接入网络, CPC接入点 (CPC Access Point, CPC AP )都支持大范围覆盖, 即覆盖了大量不同运营商不同制式的小区, 还 覆盖了不同类型的认知小区。 CPC AP周期性地广播不同区域的频谱使用状态 和服务提供状态, 终端在开机后可以从 CPC AP快速获得本地可用频谱和可提 供的服务。
由上可知, CPC网络架构下的认知网络为具有认知功能的终端与基站建立 的网络, 终端与基站需要感知无线频谱环境, 在建立认知网络前, 终端和基站 之间需要交互感知信息、 协商工作频点和广播信道等, 而 CPC AP的一个功能 就是协助基站和终端完成感知信息的交互、 工作频点协商和广播信道选择等, 最终建立认知系统。
已经提出的认知系统初始化的流程如下:
终端和基站开机并扫描 CPC,从 CPC AP获得可用的频谱集合, 即未在 CPC AP登记使用的频点的集合。
终端和基站对上述可用频点集合进行感知, 完成对各频点的评价; 然后, 基站向 CPC AP发送随机接入请求, 获得下一条消息的发送资源, 并与 CPC AP 建立 7 载。
基站与 CPC AP建立承载后,基站向 CPC AP发送感知消息,包括感知结果、 基站标识 (Identity, ID )和地理位置信息, 这里需要基站支持定位技术。 例 如: 全球卫星定位系统( Globe Postion System, GPS λ
CPC AP收到基站的消息后, 在 CPC广播信道上广播上述接收到的感知结 果。
终端根据广播的信息获取其周围所有基站的信息,并根据地理位置信息判 断此基站是否在其通信范围内, 能否满足其业务需求, 经过评价之后, 如果希 望与某一基站组网, 则首先向 CPC AP发起随机接入请求, 获得下一条消息的 发送资源, 与 CPC AP建立承载;
终端与 CPC AP建立承载后, 将频谱感知结果, 目标基站 ID等消息发送给
CPC AP; 因为还没有与基站建立工作频点, 只有通过 CPC AP告知基站: 终端 希望与基站组网;
CPC AP根据目标基站 ID将终端的感知结果发送给目标基站;
基站收到终端的感知结果后, 首先将感知数据进行融合,从而得到感知决 策, 上述感知决策包括: 本基站所在的网络的工作频点和广播信道, 并将感知 决策结果发送给 CPC AP。
CPC AP将上述感知决策发送给终端;
如果终端不满意决策结果, 则继续向 CPC AP发送感知消息, 包括感知结 果、 基站标识以及期望的工作频点等, CPC AP则将终端消息发送到基站, 基 站再调整感知决策。
如果终端满意决策结果, 则向基站与 CPC AP发送确认消息, CPC AP拆除 与基站的承载, 拆除与终端的承载;
终端与基站切换到决策结果的工作频点上, 建立通路。
发明人在实现本发明的过程中发现:
由于引入了基站 ID, 此 ID可能是全网唯一的 ID且数值很大, 因此将增加 系统实现的复杂度,终端在获知基站 ID后,终端与基站间由于不知道相互的通 信能力和范围,因此基站与终端都必须支持定位技术,引入定位技术如 GPS后, 由于 GPS价格昂贵, 会提高系统的成本。
发明内容
本发明实施例要解决的技术问题是提供一种感知导频信道支持的认知系 统初始化方法, 装置和系统, 以降低系统实现的复杂度和成本。
为解决上述技术问题,本发明所提供的感知导频信道支持的认知系统初始 化方法实施例可以通过以下技术方案实现:
向感知导频信道接入点 CPC AP发送频点初始化请求消息;
接收 CPC AP发送的频点初始化响应消息, 所述频点初始化响应消息包含 CPC专用资源描述信息;
在所述 CPC专用资源描述信息指示的信道上向终端广播基站的感知信息 和上行接入信道描述信息;
在所述 CPC专用资源上接收终端的感知信息,根据终端的感知信息决策工 作频点,将决策的工作频点发送给终端, 所述终端的感知信息是当终端的感知 信息与基站的感知信息的交集非空时,终端在所述上行接入信道描述信息指示 的信道上发送的;
在所述决策的工作频点建立与终端的链接。 一种感知导频信道支持的认知系统初始化方法, 包括:
接收 CPC AP广播的频点初始化响应消息, 所述频点初始化响应消息包含 CPC专用资源描述信息;
在所述 CPC专用资源描述信息指示的信道上接收基站的感知信息和上行 接入信道描述信息;
当终端的感知信息和所述基站的感知信息的交集非空时,在所述上行接入 信道描述信息指示的信道上向基站发送终端的感知信息,所述终端的感知信息 用于使基站决策工作频点;
接收基站发送的工作频点, 在所述工作频点建立与基站的链接。
一种基站, 包括:
初始化请求发送单元, 用于向 CPC AP发送频点初始化请求消息; 初始化响应接收单元, 用于接收 CPC AP发送的频点初始化响应消息, 所 述频点初始化响应消息包含 CPC专用资源描述信息;
广播单元,用于在所述 CPC专用资源描述信息指示的信道上向终端广播基 站的感知信息和上行接入信道描述信息;
感知信息接收单元, 用于在所述 CPC专用资源上接收终端的感知信息, 所 述终端的感知信息是当终端的感知信息与基站的感知信息的交集非空时,终端 在所述上行接入信道描述信息指示的信道上发送的;
工作频点决策单元, 用于根据终端的感知信息决策工作频点;
工作频点发送单元, 用于将决策的工作频点发送给终端;
链接建立单元, 用于在所述决策的工作频点建立与终端的链接。
一种终端, 包括:
初始化响应接收单元, 用于接收 CPC AP广播的频点初始化响应消息, 所 述频点初始化响应消息包含 CPC专用资源描述信息;
信息接收单元,用于在所述 CPC专用资源描述信息指示的信道上接收基站 的感知信息和上行接入信道描述信息;
感知信息发送单元,用于当终端的感知信息和所述基站的感知信息的交集 非空时,在所述上行接入信道描述信息指示的信道上向基站发送终端的感知信 息, 所述终端的感知信息用于使基站决策工作频点;
工作频点接收单元, 用于接收基站发送的工作频点; 链接建立单元, 用于在所述工作频点建立与基站的链接。
一种感知导频信道支持的认知系统, 包括:
基站, 用于向 CPC AP发送频点初始化请求消息; 接收 CPC AP发送的频点 初始化响应消息, 所述频点初始化响应消息包含 CPC专用资源描述信息; 在所 述 CPC专用资源描述信息指示的信道上向终端广播基站的感知信息和上行接 入信道描述信息; 在所述 CPC专用资源上接收终端的感知信息, 根据终端的感 知信息决策工作频点,将决策的工作频点发送给终端; 在所述决策的工作频点 建立与终端的链接;
终端, 用于接收 CPC AP广播的频点初始化响应消息, 所述频点初始化响 应消息包含 CPC专用资源描述信息; 在所述 CPC专用资源描述信息指示的信道 上接收基站的感知信息和上行接入信道描述信息;在所述上行接入信道描述信 息指示的信道上向基站发送终端的感知信息;所述基站的感知信息与终端的感 知信息的交集非空;接收基站发送的工作频点,在所述工作频点建立与基站的 链接。
上述技术方案具有如下有益效果: 通过上述技术方案,基站不用向终端广 播器 ID, 避免了大数值 ID的使用, 降低了系统实现的复杂度; 由于 CPC AP 为基站所在的区域分配了该区域的 CPC专用资源, 基站不用进行定位, 终端 也不再需要对基站的地理位置进行判断, 不需要引入定位技术, 降低了系统的 成本。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施 例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地, 下面描述 中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲, 在不付 出创造性劳动性的前提下, 还可以根据这些附图获得其他的附图。
图 1为本发明实施例一方法流程示意图;
图 2为本发明实施例二方法流程示意图;
图 3为本发明实施例三方法流程示意图;
图 4为本发明实施例四方法流程示意图; 图 5为本发明实施例四组网结构示意图;
图 6为本发明实施例五基站结构示意图;
图 7为本发明实施例五基站结构示意图;
图 8为本发明实施例五基站结构示意图;
图 9为本发明实施例五基站结构示意图;
图 10为本发明实施例五 CPC AP结构示意图;
图 11为本发明实施例五 CPC AP结构示意图;
图 12为本发明实施例七终端结构示意图;
图 13为本发明实施例七终端结构示意图;
图 14为本发明实施例七终端结构示意图;
图 15为本发明实施例七终端结构示意图;
图 16为本发明实施例八系统结构示意图。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清 楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明一部分实施例, 而不是 全部的实施例。基于本发明中的实施例, 本领域普通技术人员在没有作出创造 性劳动前提下所获得的所有其他实施例, 都属于本发明保护的范围。
实施例一, 如图 1所示, 本发明实施例提供了一种感知导频信道支持的认 知系统初始化方法, 包括:
101 : 向感知导频信道接入点 CPC AP发送频点初始化请求消息;
102: 接收 CPC AP发送的频点初始化响应消息, 上述频点初始化响应消息 包含 CPC专用资源描述信息;
103 : 在上述 CPC专用资源描述信息指示的信道上向终端广播基站的感知 信息和上行接入信道描述信息;
104: 在上述 CPC专用资源上接收终端的感知信息, 根据终端的感知信息 决策工作频点,将决策的工作频点发送给终端; 上述终端的感知信息是当终端 的感知信息与基站的感知信息的交集非空时,终端在上述上行接入信道描述信 息指示的信道上发送的。
在步骤 104中, 针对于每个终端, 上行接入信道描述信息指示的该终端发 送终端感知信息的上行接入信道, 属于 CPC专用资源描述信息指示的信道。 当 终端的感知信息于基站的感知信息的交集非空时,该终端就会在上述上行接入 信道描述信息指示的信道上向基站发送该终端的感知信息。
由于会有多个终端,所以各个终端会分别在上行接入信道描述信息指示的 各个终端的信道(即上行接入信道)上发送终端感知信息。 在基站侧, 基站就 会从上述 CPC专用资源上接收这些终端发送的感知信息。
上述终端的感知信息包括终端感知的网络侧可用频谱集合、网络侧设备的 发射功率等信息。
105: 在上述决策的工作频点建立与终端的链接。
近一步地, 在 104中工作频点决策完成后, 可能终端不满意当前决策结果, 还要进一步协商工作频点。
进一步地, 在 104中决策工作频点完成后, 释放 CPC专用资源描述信息指 示的信道的资源。 以上方案及时释放资源, 可以提高资源的利用率。
进一步地, 在 104接收终端的感知信息之前, 接收终端的随机接入请求, 若终端随机接入请求的资源量超过上述 CPC专用资源描述信息指示的 CPC专 用资源量, 则向 CPC AP发送资源请求消息, 并将接收到 CPC AP返回的资源信 息发送给终端。 以上方案给出了在 CPC AP分配的 CPC专用资源不够的情况下 的处理方式,提高资源分配的灵活性,使本实施例的方案更加适应实际使用的 需要。
进一步地,接收终端发送的协商请求, 上述协商请求携带有终端期望的工 作频点; 根据上述终端期望的工作频点决策新的工作频点, 并将新的工作频点 发送给上述终端; 上述在决策的工作频点建立与终端的链接包括: 在上述新的 工作频点建立与终端的链接。
以上方案提出了基站决策的工作频点不满足终端的业务需求的协商方法, 决策的工作频点不满足终端的业务需求的可以是: 根据终端对环境的测量,发 现此工作频点的信道质量不满足业务需求,或者此工作频点的吞吐量不满足业 务需求, 当然也可能有其他原因导致不满足业务需求,对此本发明实施例不予 限定。 终端期望的工作频点的获取方式可以是: 终端根据业务需求(吞吐量、 时延等), 从其感知可用的信道集合里选取满足业务需求的工作频点作为终端 期望的工作频点。基站决策新的工作频点可以是:基站收到终端的协商请求后, 从可用的工作频点集合与终端期望的工作频点的交集中选择工作频点作为新 的工作频点。 需要说明的是: 终端期望的工作频点可以是一个集合, 并不限定 只有一个工作频点。
以上实施方式的执行主体可以为基站,本实施例避免了基站向终端广播器 ID, 避免了大数值 ID的使用, 降低了系统实现的复杂度; 由于 CPC AP为基站 所在的区域分配了该区域的 CPC专用资源, 基站不用进行定位, 终端也不再需 要对基站的地理位置进行判断, 不需要引入定位技术, 降低了系统的实现复杂 度和成本; 另外, 终端不再需要对基站的地理位置进行判断, 降低了选择合适 基站的复杂度; 最后, 终端和基站不需要 CPC AP中继大量消息, 节约了 CPC 信道资源。 实施例二, 如图 2所示, 本发明实施例还提供了另一种感知导频信道支持 的认知系统初始化方法, 包括:
201 : 接收基站发送的频点初始化请求消息;
202: 接收到基站发送的频点初始化请求消息后, 为上述基站分配 CPC专 用资源
203:向基站发送频点初始化响应消息,上述频点初始化响应消息包含 CPC 专用资源描述信息, 并向终端广播上述频点初始化响应消息。
进一步地, 若接收到基站发送的资源请求消息, 则根据上述资源请求消息 重新分配 CPC资源, 然后向基站和终端发送分配 CPC的资源信息。
上述 CPC专用资源还可以由 CPC AP在未接收到初始化请求的情况下周期 性地分配给认知系统。上述分配的 CPC专用资源还分配给上述基站覆盖范围以 外的其他基站。 这样可以对 CPC资源进行复用, 从而提高 CPC资源利用率。
以上实施方式的执行主体可以为 CPC AP, 本实施例为基站和终端分配专 用的 CPC资源, 终端与基站直接通信不再通过 CPC AP进行通信, 节约了基站 与 CPC AP间的信道资源; 另外基站也不再需要广播自己的 ID, 避免了使用数 值大的 ID的麻烦; 再次,基站不用进行定位, 从而节省引入定位技术带来的推 广困难的问题; 最后, 终端和基站不需要 CPC AP中继大量消息, 节约了 CPC 信道资源。 实施例三, 如图 3所示, 本发明实施例还提供了另一种感知导频信道支持 的认知系统初始化方法, 包括:
301 : 接收 CPC AP广播的频点初始化响应消息, 上述频点初始化响应消息 包含 CPC专用资源描述信息;
302: 在上述 CPC专用资源描述信息指示的信道上接收基站的感知信息和 上行接入信道描述信息;
303: 当上述基站的感知信息与终端的感知信息的交集非空时, 在上述上 行接入信道描述信息指示的信道上向基站发送终端的感知信息;
304: 接收基站发送的工作频点, 在上述工作频点建立与基站的链接。 进一步地, 上述 303中, 发送终端的感知信息之前还包括:
向基站发送随机接入请求消息, 并接收资源信息;
上述 303中在上述上行接入信道描述信息指示的信道上向基站发送终端的 感知信息包括:
在上述上行接入信道描述信息在上述资源信息指示的信道上向基站发送 终端的感知信息。
以上进一步的实施方式, 在 CPC AP可能分配的 CPC专用资源不够的情况 下的处理方式,提高资源分配的灵活性,使本实施例的方案更加适应实际使用 的需要。
进一步地, 上述 303中, 发送终端的感知信息之前, 还包括:
根据基站信号强度判断基站是否满足终端的业务需求, 若满足, 则执行发 送终端的感知信息。 以上实施方式, 给出终端选择基站的一个具体举例, 可以 理解的是, 如果采用其他的方式来进行基站的选择也是可以的,对此本发明实 施例不予限定。
进一步地, 上述 304中, 还可以: 检测上述工作频点是否满足终端的业务 需求, 若不满足, 则向基站发送协商请求, 上述协商请求携带有终端期望的工 作频点; 接收基站发送的新的工作频点; 上述在上述工作频点建立与基站的链 接包括: 在上述新的工作频点建立与基站的链接。
以上实施方式的执行主体可以为终端, 本实施例中, 终端获得了 CPC AP 为其分配的 CPC专用资源, 终端与基站直接通信不再通过 CPC AP进行通信, 节约了基站与 CPC AP间的信道资源; 另外终端不用进行定位, 从而减少引入 定位技术带来的推广困难的问题。 实施例四,本实施例给出一个具体的实例对 CPC系统整个组网过程进行说 明, 如图 4所示, 具体的流程包括:
401 : 终端和基站开机并扫描 CPC信道, 获得可用的频谱集合, 上述可用 频谱集合是未在 CPC登记使用的频点的集合,终端和基站可以在其中选择合适 的频点工作;
402: 终端和基站执行频谱感知, 在 CPC给出的可用频点集合中进行感知, 完成对各频点的评价, 然后基站向 CPC AP发送随机接入请求, 获得下一条消 息的发送资源, 与 CPC AP建立承载;
403: 基站与 CPC AP建立承载后, 基站向 CPC AP发送频点初始化请求消 息;
404: CPC AP收到频点初始化请求消息之后, 在 CPC资源中分配专用资源 用于认知系统的建立,并且此专用资源可以用于其它小范围覆盖的认知系统建 立; 将上述分配的专用资源描述信息发送给基站和终端, 上述发送方式可以为 广播;
如图 5所示, 由于 CPC AP支持大范围覆盖, 可能上百公里, 其下可以包括 各种类型的小区, 认知网络存在于小范围区域内, 可能只有几十米, 比如家庭 和会议场所, 一个基站只支持一个家庭或者一个会议室的终端接入, 终端和基 站通过感知周围环境, 协商工作频点; 由于认知网络只会在小范围覆盖, 而 CPC网络为大范围覆盖网络, 因此分配给认知系统的专用资源在认知网络相互 不干扰的情况下可以进行复用。在图 5中认知系统的专用资源被 CPC AP分配给 了 CPC覆盖范围内三个认知无线电 (Cognitive Radio, CR ) 的网络。
405: 基站获得 CPC分配的专用信道后, 释放链接, 拆除 402中与 CPC AP 的承载, 并在上述专用信道上进行广播, 其广播内容包括基站的感知信息和上 行接入信道描述信息;
406: 终端在专用信道上收到广播信息后, 可以根据信号强度判断此基站 能否满足业务的需求,并且根据终端的感知信息和基站的感知信息选择满足终 端业务的基站(终端的感知信息和基站的感知信息的交集不可以为空, 如果为 空则表示没有感知到相同的可用信道), 并读取上行接入描述信息, 根据上述 随机接入资源的位置向基站发送随机接入请求;
407: 基站收到多个用户的随机接入请求, 则根据认知用户数判断是否需 要调整专用信道资源,具体的判断方式可以是判断 CPC专用资源是否大于或等 于多个用户请求的资源, 如果不需要调整专用信道资源, 那么可以进入 408, 如果否, 则向 CPC AP发起资源请求, 请求调整专用信道资源大小, 并将获取 的资源信息发送给终端, 包括为终端分配的感知结果上报资源;
408: 终端向基站发送接入请求后, 基站会在 CPC专用信道上为终端分配 感知结果上报的资源, 即上行接入信道, 上述上行接入信道的信息可以通过上 行接入信道描述信息来携带, 终端则在此资源上将感知信息上报给基站; 需要说明的是,上行接入信道的信息指示的信道资源属于 CPC专用资源指 示的信道,基站发送感知信息和上行接入信道描述信息, 以及终端接收基站发 送的上述信息都使用 CPC专用资源指示的信道; 而终端向基站发送信息则使用 基站为终端分配的信道资源, 即上行接入信道描述信息指示的信道。
409: 基站收到终端的感知信息之后, 融合感知结果, 决策工作频点, 并 将决策结果进行广播;
410: 终端获得上述广播的工作频点的信息之后, 判决是否为最合理的工 作频点, 如果不是可以继续向基站发送消息, 包括终端期望的工作频点, 最终 与基站达成一致后切换到上述工作频点, 与基站建立链接; 从而完成认知网络 组网;
411 : 同时, 基站向 CPC AP发送请求以释放 CPC专用资源。
本实施例为基站和终端分配专用的 CPC资源,终端与基站直接通信不再通 过 CPC AP进行通信, 节约了基站与 CPC AP间的信道资源; 另外避免了基站向 终端广播器 ID, 避免了大数值 ID的使用, 降低了系统实现的复杂度; 由于 CPC AP为基站所在的区域分配了该区域的 CPC专用资源, 基站不用进行定位, 终 端也不再需要对基站的地理位置进行判断, 不需要引入定位技术, 降低了系统 的实现复杂度和成本; 终端不再需要对基站的地理位置进行判断, 降低了选择 合适基站的复杂度。 实施例五, 如图 6所示, 本发明实施例提供了一种基站, 包括:
初始化请求发送单元 601, 用于向 CPC AP发送频点初始化请求消息; 初始化响应接收单元 602, 用于接收 CPC AP发送的频点初始化响应消息, 上述频点初始化响应消息包含 CPC专用资源描述信息;
广播单元 603, 用于在上述 CPC专用资源描述信息指示的信道上向终端广 播基站的感知信息和上行接入信道描述信息;
感知信息接收单元 604,用于在上述 CPC专用资源上接收终端的感知信息, 上述终端的感知信息是当终端的感知信息与基站的感知信息的交集非空时,终 端在上述上行接入信道描述信息指示的信道上发送的;
工作频点决策单元 605, 用于根据终端的感知信息决策工作频点; 工作频点发送单元 606, 用于将决策的工作频点发送给终端;
链接建立单元 607, 用于在上述决策的工作频点建立与终端的链接。
进一步地, 如图 7所示, 上述基站, 还包括:
释放单元 701, 用于决策工作频点完成后, 释放 CPC专用资源描述信息指 示的信道的资源。
进一步地, 如图 8所示, 上述基站, 还包括:
随机接入请求接收单元 801, 用于接收终端的随机接入请求;
资源请求发送单元 802, 用于若终端随机接入请求的资源量超过上述 CPC 专用资源描述信息指示的 CPC专用资源量, 则向 CPC AP发送资源请求消息; 资源信息发送单元 803, 用于将接收到 CPC AP返回的资源信息发送给终 端。
进一步地, 如图 9所示, 上述基站, 还包括:
协商请求接收单元 901, 用于接收终端发送的协商请求, 上述协商请求携 带有终端期望的工作频点;
上述工作频点决策单元 605, 还用于根据上述终端期望的工作频点决策新 的工作频点;
上述工作频点发送单元 606, 还用于将新的工作频点发送给上述终端; 上述链接建立单元 607, 用于在上述新的工作频点建立与终端的链接。 本实施例的基站不用广播自己的 ID,避免了使用数值大的 ID的麻烦;另夕卜, 基站不用进行定位, 从而节省引入定位技术带来的推广困难的问题, 再次, 终 端不再需要对基站的地理位置进行判断, 降低了选择合适基站的复杂度。 实施例六, 如图 10所示, 本发明实施例还提供了一种 CPC AP, 包括: 初始化请求接收单元 1001, 用于接收基站发送的频点初始化请求消息; 专用资源分配单元 1002, 用于接收到基站发送的频点初始化请求消息后, 为上述基站分配 CPC专用资源;
初始化响应发送单元 1003, 用于向基站发送频点初始化响应消息, 上述频 点初始化响应消息包含 CPC专用资源描述信息;
广播单元 1004, 用于向终端广播上述频点初始化响应消息。
进一步地, 如图 11所示,
上述专用资源分配单元 1002, 还用于若接收到基站发送的资源请求消息, 则根据上述资源请求消息重新分配 CPC资源;
还包括: 资源信息发送单元 1101, 用于向基站和终端发送分配 CPC的资源 信息。
本实施例为基站和终端分配专用的 CPC资源,终端与基站直接通信不再通 过 CPC AP进行通信, 节约了基站与 CPC AP间的信道资源; 另外基站也不再需 要广播自己的 ID, 避免了使用数值大的 ID的麻烦; 再次, 基站不用进行定位, 从而节省引入定位技术带来的推广困难的问题; 最后, 终端和基站不需要 CPC AP中继大量消息, 节约了 CPC信道资源。 实施例七, 如图 12所示, 本发明实施例还提供了一种终端, 包括: 初始化响应接收单元 1201,用于接收 CPC AP广播的频点初始化响应消息, 上述频点初始化响应消息包含 CPC专用资源描述信息;
信息接收单元 1202,用于在上述 CPC专用资源描述信息指示的信道上接收 基站的感知信息和上行接入信道描述信息;
感知信息发送单元 1203,用于当终端的感知信息和所述基站的感知信息的 交集非空时,在上述上行接入信道描述信息指示的信道上向基站发送终端的感 知信息, 上述终端的感知信息用于使基站决策工作频点;
工作频点接收单元 1204, 用于接收基站发送的工作频点;
链接建立单元 1205, 用于在上述工作频点建立与基站的链接。
进一步地, 如图 13所示, 上述终端, 还包括:
随机接入请求发送单元 1301, 用于向基站发送随机接入请求消息; 资源信息接收单元 1302, 用于接收资源信息;
上述感知信息发送单元 1203,用于根据上述上行接入信道描述信息在上述 资源信息指示的信道上向基站发送终端的感知信息。
进一步地, 如图 14所示, 上述终端, 还包括:
判断单元 1401, 用于根据基站信号强度判断基站是否满足终端的业务需 求;
上述感知信息发送单元 1203, 用于判断单元 1401判断为满足时,执行发送 终端的感知信息。
进一步地, 如图 15所示, 上述终端, 还包括:
检测单元 1501, 用于检测上述工作频点是否满足终端的业务需求; 协商请求发送单元 1502, 用于若检测单元 1501检测结果为不满足, 则向基 站发送协商请求, 上述协商请求携带有终端期望的工作频点;
上述工作频点接收单元 1204, 还用于接收基站发送的新的工作频点; 上述链接建立单元 1205, 用于在上述新的工作频点建立与基站的链接。 实施例八, 如图 16所示, 本发明实施例还提供了一种感知导频信道支持的 认知系统, 包括:
基站 1601,用于向 CPC AP ( 1602 )发送频点初始化请求消息;接收 CPC AP ( 1602 )发送的频点初始化响应消息, 上述频点初始化响应消息包含 CPC专用 资源描述信息;在上述 CPC专用资源描述信息指示的信道上向终端 1603广播基 站 1601的感知信息和上行接入信道描述信息; 接收终端 1603的感知信息,根据 终端 1603的感知信息决策工作频点,将决策的工作频点发送给终端 1603; 在上 述决策的工作频点建立与终端 1603的链接;
终端 1603, 用于接收 CPC AP ( 1602 ) 广播的频点初始化响应消息, 上述 频点初始化响应消息包含 CPC专用资源描述信息; 在上述 CPC专用资源描述信 息指示的信道上接收基站 1601的感知信息和上行接入信道描述信息;在上述上 行接入信道描述信息指示的信道上向基站 1601发送终端 1603的感知信息;上述 基站 1601的感知信息与终端 1603的感知信息的交集非空;接收基站 1601发送的 工作频点, 在上述工作频点建立与基站 1601的链接。
进一步地, 上述基站 1601, 还用于在接收终端 1603的感知信息的之前, 接 收终端 1603的随机接入请求,若终端 1603随机接入请求的资源量超过上述 CPC 专用资源描述信息指示的 CPC专用资源量, 则向 CPC AP ( 1602 )发送资源请 求消息, 并将接收到 CPC AP ( 1602 )返回的资源信息发送给终端 1603 ;
上述终端 1603,还用于发送终端 1603的感知信息之前, 向基站 1601发送随 机接入请求消息, 并接收资源信息; 在上述上行接入信道描述信息指示的信道 上向基站 1601发送终端 1603的感知信息包括:在上述上行接入信道描述信息在 上述资源信息指示的信道上向基站 1601发送终端 1603的感知信息。
进一步地,
上述基站 1601, 还用于在上述决策的工作频点建立与终端 1603的链接之 前,接收终端 1603发送的协商请求, 上述协商请求携带有终端 1603期望的工作 频点; 才艮据上述终端 1603期望的工作频点决策新的工作频点, 并将新的工作频 点发送给上述终端 1603 ; 则上述在决策的工作频点建立与终端 1603的链接包 括: 在上述新的工作频点建立与终端 1603的链接;
上述终端 1603,还用于在上述工作频点建立与基站 1601的链接之前,检测 上述工作频点是否满足终端 1603的业务需求, 若不满足, 则向基站 1601发送协 商请求, 上述协商请求携带有终端 1603期望的工作频点; 接收基站 1601发送的 新的工作频点; 上述在上述工作频点建立与基站 1601的链接包括: 在上述新的 工作频点建立与基站 1601的链接。
本实施例为基站和终端分配专用的 CPC资源,终端与基站直接通信不再通 过 CPC AP进行通信, 节约了 CPC的信道资源, 并且专用的 CPC资源可以在不 同地理位置复用, 避免了基站与终端频繁占用 CPC资源, 也节约了 CPC的信道 资源; 另外基站也不再需要广播自己的 ID,避免了使用数值大的 ID的麻烦; 再 次, 基站不用进行定位, 从而节省引入定位技术带来的推广困难的问题。 终端 不再需要对基站的地理位置进行判断, 降低了选择合适基站的复杂度。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分步骤 是可以通过程序来指令相关的硬件完成,上述的程序可以存储于一种计算机可 读存储介质中, 上述提到的存储介质可以是只读存储器, 磁盘或光盘等。
以上对本发明实施例所提供的感知导频信道支持的认知系统初始化方法, 式进行了阐述,以上实施例的说明只是用于帮助理解本发明的方法及其核心思 想; 同时, 对于本领域的一般技术人员, 依据本发明的思想, 在具体实施方式 及应用范围上均会有改变之处, 综上, 本说明书内容不应理解为对本发明的限 制。

Claims

权 利 要 求
1、 一种感知导频信道支持的认知系统初始化方法, 其特征在于, 包括: 向感知导频信道接入点 CPC AP发送频点初始化请求消息;
接收 CPC AP发送的频点初始化响应消息, 所述频点初始化响应消息包含
CPC专用资源描述信息;
在所述 CPC专用资源描述信息指示的信道上向终端广播基站的感知信息 和上行接入信道描述信息;
在所述 CPC专用资源上接收终端的感知信息,根据终端的感知信息决策工 作频点,将决策的工作频点发送给终端, 所述终端的感知信息是当终端的感知 信息与基站的感知信息的交集非空时,终端在所述上行接入信道描述信息指示 的信道上发送的;
在所述决策的工作频点建立与终端的链接。
2、 根据权利要求 1所述方法, 其特征在于, 还包括:
决策工作频点完成后, 释放 CPC专用资源描述信息指示的信道的资源。
3、 根据权利要求 1或 2所述方法, 其特征在于, 所述接收终端的感知信息 之前还包括:
接收终端的随机接入请求,若终端随机接入请求的资源量超过所述 CPC专 用资源描述信息指示的 CPC专用资源量, 则向 CPC AP发送资源请求消息, 并 将接收到 CPC AP返回的资源信息发送给终端。
4、 根据权利要求 1或 2所述方法, 其特征在于, 在所述决策的工作频点建 立与终端的链接之前还包括:
接收终端发送的协商请求, 所述协商请求携带有终端期望的工作频点; 根 据所述终端期望的工作频点决策新的工作频点,并将新的工作频点发送给所述 终端;
所述在决策的工作频点建立与终端的链接包括:
在所述新的工作频点建立与终端的链接。
5、 一种感知导频信道支持的认知系统初始化方法, 其特征在于, 包括: 接收 CPC AP广播的频点初始化响应消息, 所述频点初始化响应消息包含 CPC专用资源描述信息;
在所述 CPC专用资源描述信息指示的信道上接收基站的感知信息和上行 接入信道描述信息;
当终端的感知信息和所述基站的感知信息的交集非空时,在所述上行接入 信道描述信息指示的信道上向基站发送终端的感知信息,所述终端的感知信息 用于使基站决策工作频点;
接收基站发送的工作频点, 在所述工作频点建立与基站的链接。
6、根据权利要求 5所述方法, 其特征在于, 所述发送终端的感知信息之前 还包括:
向基站发送随机接入请求消息, 并接收资源信息;
在所述上行接入信道描述信息指示的信道上向基站发送终端的感知信息 包括:
在所述上行接入信道描述信息在所述资源信息指示的信道上向基站发送 终端的感知信息。
7、 根据权利要求 5或 6所述方法, 其特征在于, 所述发送终端的感知信息 之前, 还包括:
根据基站信号强度判断基站是否满足终端的业务需求, 若满足, 则执行发 送终端的感知信息。
8、 根据权利要求 5或 6所述方法, 其特征在于, 在所述工作频点建立与基 站的链接之前, 还包括:
检测所述工作频点是否满足终端的业务需求, 若不满足, 则向基站发送协 商请求, 所述协商请求携带有终端期望的工作频点; 接收基站发送的新的工作 频点;
所述在所述工作频点建立与基站的链接包括:
在所述新的工作频点建立与基站的链接。
9、 一种基站, 其特征在于, 包括:
初始化请求发送单元, 用于向 CPC AP发送频点初始化请求消息; 初始化响应接收单元, 用于接收 CPC AP发送的频点初始化响应消息, 所 述频点初始化响应消息包含 CPC专用资源描述信息;
广播单元,用于在所述 CPC专用资源描述信息指示的信道上向终端广播基 站的感知信息和上行接入信道描述信息;
感知信息接收单元, 用于在所述 CPC专用资源上接收终端的感知信息, 所 述终端的感知信息是当终端的感知信息与基站的感知信息的交集非空时,终端 在所述上行接入信道描述信息指示的信道上发送的;
工作频点决策单元, 用于根据终端的感知信息决策工作频点;
工作频点发送单元, 用于将决策的工作频点发送给终端;
链接建立单元, 用于在所述决策的工作频点建立与终端的链接。
10、 根据权利要求 9所述基站, 其特征在于, 还包括:
释放单元, 用于决策工作频点完成后, 释放 CPC专用资源描述信息指示的 信道的资源。
11、 根据权利要求 9或 10所述基站, 其特征在于, 还包括:
随机接入请求接收单元, 用于接收终端的随机接入请求;
资源请求发送单元,用于若终端随机接入请求的资源量超过所述 CPC专用 资源描述信息指示的 CPC专用资源量, 则向 CPC AP发送资源请求消息;
资源信息发送单元, 用于将接收到 CPC AP返回的资源信息发送给终端。
12、 根据权利要求 9或 10所述基站, 其特征在于, 还包括:
协商请求接收单元, 用于接收终端发送的协商请求, 所述协商请求携带有 终端期望的工作频点;
所述工作频点决策单元,还用于根据所述终端期望的工作频点决策新的工 作频点;
所述工作频点发送单元, 还用于将新的工作频点发送给所述终端; 所述链接建立单元, 用于在所述新的工作频点建立与终端的链接。
13、 一种终端, 其特征在于, 包括:
初始化响应接收单元, 用于接收 CPC AP广播的频点初始化响应消息, 所 述频点初始化响应消息包含 CPC专用资源描述信息;
信息接收单元,用于在所述 CPC专用资源描述信息指示的信道上接收基站 的感知信息和上行接入信道描述信息;
感知信息发送单元,用于当终端的感知信息和所述基站的感知信息的交集 非空时,在所述上行接入信道描述信息指示的信道上向基站发送终端的感知信 息, 所述终端的感知信息用于使基站决策工作频点; 工作频点接收单元, 用于接收基站发送的工作频点;
链接建立单元, 用于在所述工作频点建立与基站的链接。
14、 根据权利要求 13所述终端, 其特征在于, 还包括:
随机接入请求发送单元, 用于向基站发送随机接入请求消息;
资源信息接收单元, 用于接收资源信息;
所述感知信息发送单元,用于根据所述上行接入信道描述信息在所述资源 信息指示的信道上向基站发送终端的感知信息。
15、 根据权利要求 13或 14所述终端, 其特征在于, 还包括:
判断单元, 用于根据基站信号强度判断基站是否满足终端的业务需求; 所述感知信息发送单元, 用于判断单元判断为满足时,执行发送终端的感 知信息。
16、 根据权利要求 13或 14所述终端, 其特征在于, 还包括:
检测单元, 用于检测所述工作频点是否满足终端的业务需求;
协商请求发送单元, 用于若检测单元检测结果为不满足, 则向基站发送协 商请求, 所述协商请求携带有终端期望的工作频点;
所述工作频点接收单元, 还用于接收基站发送的新的工作频点; 所述链接建立单元, 用于在所述新的工作频点建立与基站的链接。
17、 一种感知导频信道支持的认知系统, 其特征在于, 包括:
基站, 用于向 CPC AP发送频点初始化请求消息; 接收 CPC AP发送的频点 初始化响应消息, 所述频点初始化响应消息包含 CPC专用资源描述信息; 在所 述 CPC专用资源描述信息指示的信道上向终端广播基站的感知信息和上行接 入信道描述信息; 在所述 CPC专用资源上接收终端的感知信息, 根据终端的感 知信息决策工作频点,将决策的工作频点发送给终端; 在所述决策的工作频点 建立与终端的链接;
终端, 用于接收 CPC AP广播的频点初始化响应消息, 所述频点初始化响 应消息包含 CPC专用资源描述信息; 在所述 CPC专用资源描述信息指示的信道 上接收基站的感知信息和上行接入信道描述信息;在所述上行接入信道描述信 息指示的信道上向基站发送终端的感知信息;所述基站的感知信息与终端的感 知信息的交集非空; 接收基站发送的工作频点,在所述工作频点建立与基站的 链接。
18、 根据权利要求 17所述系统, 其特征在于,
所述基站,还用于在接收终端的感知信息的之前,接收终端的随机接入请 求, 若终端随机接入请求的资源量超过所述 CPC专用资源描述信息指示的 CPC 专用资源量, 则向 CPC AP发送资源请求消息, 并将接收到 CPC AP返回的资源 信息发送给终端;
所述终端,还用于发送终端的感知信息之前, 向基站发送随机接入请求消 息, 并接收资源信息; 在所述上行接入信道描述信息指示的信道上向基站发送 终端的感知信息包括:在所述上行接入信道描述信息在所述资源信息指示的信 道上向基站发送终端的感知信息。
19、 根据权利要求 17或 18所述系统, 其特征在于,
所述基站,还用于在所述决策的工作频点建立与终端的链接之前,接收终 端发送的协商请求, 所述协商请求携带有终端期望的工作频点; 根据所述终端 期望的工作频点决策新的工作频点, 并将新的工作频点发送给所述终端; 则所 述在决策的工作频点建立与终端的链接包括:在所述新的工作频点建立与终端 的链接;
所述终端,还用于在所述工作频点建立与基站的链接之前,检测所述工作 频点是否满足终端的业务需求, 若不满足, 则向基站发送协商请求, 所述协商 请求携带有终端期望的工作频点; 接收基站发送的新的工作频点; 所述在所述 工作频点建立与基站的链接包括: 在所述新的工作频点建立与基站的链接。
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