WO2007082440A1 - Procédé et système permettant de sélection et d'attribution automatiques de ressources - Google Patents

Procédé et système permettant de sélection et d'attribution automatiques de ressources Download PDF

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Publication number
WO2007082440A1
WO2007082440A1 PCT/CN2006/003108 CN2006003108W WO2007082440A1 WO 2007082440 A1 WO2007082440 A1 WO 2007082440A1 CN 2006003108 W CN2006003108 W CN 2006003108W WO 2007082440 A1 WO2007082440 A1 WO 2007082440A1
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WIPO (PCT)
Prior art keywords
community
base station
frequency
frequency point
same
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PCT/CN2006/003108
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English (en)
Chinese (zh)
Inventor
Quanbo Zhao
Xuyong Wu
Zhong Pan
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Huawei Technologies Co., Ltd.
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Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2007082440A1 publication Critical patent/WO2007082440A1/fr

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    • 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
    • H04W16/06—Hybrid resource partitioning, e.g. channel borrowing
    • 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
    • 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

Definitions

  • the present invention relates to the field of network communications, and in particular, to a method and system for automatically performing resource selection and allocation by a base station. Background of the invention
  • BWA Broadband wireless access
  • BWA devices can provide users with convenient broadband access.
  • Wireless spectrum resources are invaluable in broadband wireless access technologies. Especially in some areas that are not well planned, as well as some unlicensed frequency bands, there are often multiple base stations operating in the same frequency band, causing signals from different base stations to interfere with each other. Therefore, in order to coordinate the coexistence between the base station devices in the same frequency band, especially between the base station devices on the unlicensed frequency band, it is necessary to establish a coexistence mechanism between the base station devices.
  • a neighboring station is a base station that has a common coverage area and that has a valid terminal in the common coverage area.
  • BS1 base station 1
  • BS2 base station 2
  • BS1 and BS2 stations themselves are each in the coverage area of the other party, but due to the common coverage of the BS1 and BS2 sites.
  • BS2 and BS3 base station 3
  • each of them is not in the coverage area of the other party, but there is an effective terminal in the overlapping coverage area, causing interference to the other party's wireless network, so the connection between BS2 and BS3 is called For the neighbor station.
  • the neighboring stations need to negotiate with each other to implement a negotiation coexistence mechanism between the base stations. Then, according to the result of the negotiation, when allocating the air interface resources, the base station will use the contention air interface resources (such as time period, subchannel, etc.) to send the data to the terminal in the non-interference area, and use the exclusive air interface resources (such as the time period). , subchannel, etc.) Send data to the terminal of the interfered area.
  • the contention air interface resources such as time period, subchannel, etc.
  • the running base station needs to know the state of the terminal being interfered at all times, and needs to know whether each terminal is interfered with and which base stations are interfered with, so that inter-base station negotiation can be performed.
  • a location community is a set of base stations in the same environment. A subset of any one of the base stations or a part of the base stations in a location community is effective with at least one base station in the local location but not belonging to the subset. Common coverage area. For example, in the network shown in FIG. 2, BS1, BS2, BS3, BS4 (base station 4) collectively form a location community LI. On the other hand, although BS5 (base station 5) has a coverage area overlapping with BS3, since there is no effective terminal in the overlap area, BS5 does not belong to location community L1, but independently constitutes location community L2. For BS6 and BS7, they do not belong to the location community L1, L2, but constitute another location community L3.
  • a co-channel community refers to a set of base stations operating in the same channel (ie, the same frequency point) in the same environment.
  • a subset consisting of any one of the base stations or a part of the base stations is at least one body, but Base stations that do not belong to this subset have a valid common coverage area.
  • BS4 has an effective common coverage area with BS1 and BS3, BS4 does not belong to Cl because it works on different channels.
  • BS5 has an overlapping coverage area with BS3, BS5 does not belong to the same-community Cl because there is no effective terminal in the overlapping area.
  • BS6 base station 6
  • BS7 base station 7
  • the complete frame time obtained by the uninterrupted work is called the Master Subframe.
  • the specific implementation of the fair share channel bandwidth resource may be, but is not limited to, equally allocating time slots according to the number of base stations in the community, or proportionally allocating time slots according to the bandwidth requirement reported by the base station.
  • BS1, BS2, and BS3 occupy the same channel and form a co-channel community.
  • the two base stations have effective coverage areas, that is, neighboring stations.
  • a minimum of three primary subframes are required in the same community to allocate one primary subframe to each of the three base stations BS1, BS2 and BS3.
  • the primary subframe of the above base station has three multiplexing modes, as shown in Figure 5, Figure 6, and Figure 7, respectively.
  • an idle time slice is often opened in the original physical frame format of the base station as a CTS (Coexistence Time Slot).
  • the coexistence base station includes an IBS (Initialization Base Station), an OBS (Operating Base Station), and the like, and the terminal can use these shared dedicated time slices to complete the coexistence message.
  • the transmission such as the neighboring station discovery process of the newly activated base station, needs to use these shared dedicated time slices to transmit coexistence messages between the base station and the terminal.
  • the adjacency relationship table of the base station can be used to completely record the adjacency relationship of each base station in the location community, that is, whether each base station and other base stations in the community are adjacent to each other, and the network topology of the location community is reflected.
  • the row and column of the adjacency relation table are sorted in the same order, for example, in descending order of the number of neighbors.
  • the value of the adjacency relation table is a symmetric matrix. For each element, the value of '0' indicates that the corresponding base station and column two base stations are not adjacent to each other, and the value indicates that the corresponding two base stations are adjacent to each other.
  • Table 1 below is an example of an adjacency relation table (the number of neighboring stations of each of the base stations BS1, BS2, ..., BSn is sequentially decreased).
  • Table 1 Schematic diagram of the adjacency relation table Base station identification BS1 BS2 BSn
  • the above adjacency list needs to be updated synchronously when the topology of the location community changes. Changes in the topology of the location community include changes due to factors such as the start of a new base station, the exit of a working base station, and the change in coverage of the base station.
  • All base stations in the location community share a limited number of air interface resources.
  • a base station in the location community may have multiple neighboring stations. Each base station newly added to the location community cannot arbitrarily choose to occupy air interface resources. Otherwise, it may already A neighboring station that is working normally causes interference.
  • the addition of a newly activated base station will result in the expansion of the location community. This expansion may not only involve the addition of a new base station, but may also result in the merger of multiple location commons due to the simultaneous coverage of two or more location communities by the new base station.
  • BS1 ⁇ BS6 are base stations that are working normally, and belong to two different location communities respectively. It is assumed that the area where the two location communities are located has only three available frequency points, and are covered with different edge lines respectively. The circular area is represented. The base stations that intersect in the network shown in Fig. 8 are mutually adjacent stations. If the same frequency is used between neighbors, interference will occur. An allocation scheme of the three frequency points in the two communities is shown in FIG.
  • the original base station in the two locations can be guaranteed to enjoy a frequency point without interference, or
  • the newly added base station BS7 allocates an existing frequency point resource, that is, a frequency point indicated by a circular area covered by a solid line.
  • there are other frequency resource allocation methods that can also assign one of the three frequency resources indicated by the circular area covered by the different edge lines to the BS7.
  • All base stations in the same community work at the same frequency point, and the spectrum resources are time-multiplexed. However, two base stations that are not adjacent to each other in the community can use the resource at the same time, and two base stations that are neighboring stations cannot use the resource at the same time. New start If the base station operates at the frequency point, when the newly activated base station joins the same-channel community, it will cause the expansion of the same-community community. Since the co-location community is a subset of the location community, the base station does not need to store a dedicated adjacency list for the co-channel community.
  • Fig. 8 and Fig. 9 if the resources represented by the circular areas covered by the three different edge lines are regarded as the main sub-frames, the above-mentioned optimization effect is also obtained. That is, all base stations in the figure occupy the same frequency point. Before the new base station BS7 is added, BS1 ⁇ BS3, BS4 ⁇ BS6 respectively form two co-channel communities. The circular areas covered by the three different edge lines respectively indicate the distribution of the primary sub-frames. After the new base station BS7 is added, the two fellow communities are merged into one.
  • a primary subframe needs to be added to BS7, resulting in a decrease in the bandwidth of all communities.
  • BS7 can use the primary subframe indicated by the circular area covered by the solid line.
  • a method for selecting and negotiating a working channel in a location community in the prior art is as follows: using various network planning methods, statically configuring resources for the newly activated base station, so that each base station in the location community is occupied as much as possible Different resource individuals, that is, occupy different working channel resources, and the working channel resources include frequency points, time division multiplexed subframes, and the like. This method requires prior reservation of resources for the newly activated base station.
  • Another method for selecting and negotiating a working channel in a location community by another newly activated base station in the prior art is: the newly activated base station first listens to the interference signal strength at each frequency point in the location community, and selects an idle according to the result of the interception. Frequency point, as the working frequency of the newly activated base station. If the idle frequency point is not selected according to the result of the interception, then one frequency point is arbitrarily selected, and then the broadcast contact information is transmitted through the CTS time slot in the frequency point.
  • the base station When the base station receives the response message of the broadcast contact information returned by the other base station, it indicates that the transmission of the newly activated base station causes interference to other base stations in the frequency point, and the newly activated base station continues to select other frequency points and continues to pass the CTS.
  • the slot sends broadcast contact information.
  • the base station does not receive the response message returned by the other base station, it indicates that the transmission of the newly activated base station does not cause interference to other base stations in the frequency point, and the newly activated base station can use the selected frequency point as its working frequency point.
  • An object of the present invention is to provide a method and system for automatically performing resource selection and allocation by a base station, so that a coexistence base station (including an IBS) can automatically obtain an available frequency point according to the occupancy of frequency resources in the location community. Or, an available primary subframe is automatically obtained according to the occupancy of the primary subframe resource in the co-channel community of the frequency point.
  • a coexistence base station including an IBS
  • a method for a base station to automatically perform resource selection and allocation including:
  • the base station When the base station is allowed to automatically perform frequency point selection and allocation, the base station according to the obtained neighboring relationship of the location community And frequency allocation information, reallocating the frequency resources of the location community, and selecting the idle frequency as its working frequency.
  • the reallocating the frequency resources of the location community specifically includes:
  • the base station re-allocates the frequency resource of the location community, and when the number of frequency points required by the re-allocated location community is less than or equal to the maximum available frequency of the location community, the base station and the location The other base stations in the community negotiate and select the idle frequency as their working frequency.
  • the method further includes: the base station detecting each available frequency point, broadcasting a contact request at the respective frequency points, and obtaining a neighbor relationship table of the location community ;
  • the base station Determining, by the base station, whether there is an idle frequency point in the location community according to the adjacency relationship table of the location community, and if yes, the base station selects the idle frequency point as its working frequency point; otherwise, the base station The frequency resources of the location community are reallocated.
  • the base station includes a coexistence base station that requires a status update or a coexistence base station that starts to start.
  • a method for a base station to automatically perform resource selection and allocation including:
  • the base station When the base station is allowed to automatically perform the primary subframe selection and allocation, the base station performs the primary subframe in the same-channel community according to the obtained adjacency relationship of the same-channel community of the frequency point and the primary subframe allocation information. Reassign, select the idle primary subframe as its working subframe.
  • the reallocating the primary subframes in the same-channel community specifically includes:
  • the base station re-allocates the primary subframe of the co-channel community at the frequency point according to the set sequence, and if the number of primary subframes required by the same-channel community after reallocating the primary subframe is less than or equal to the primary subframe.
  • the base station negotiates with other base stations in the same community, selects the frequency of the same-channel community as its working frequency, and selects the idle primary subframe as its working sub-frame. Frame; otherwise, the base station performs the redistribution and determination process on the primary subframe of the co-channel community of the next frequency point.
  • the method further includes: - the base station traverses all frequency points of the community in which the location is located, and sequentially collects information of the same-community of each frequency point at all frequency points, according to The frequency occupancy report returned by each neighboring station obtains the adjacency relation table of the same-community of each frequency point, the number and distribution of the primary subframes;
  • the base station determines, according to the obtained sequence, the adjacency relation table of the same-community of the frequency point and the distribution of the primary subframe, whether there is an idle primary subframe in the same-channel community of each frequency point, if any And the base station selects a frequency point of the same-channel community as a working frequency point, and selects the idle primary subframe as its working subframe; otherwise, determines a common-community of the next frequency point, when all frequency points The same community does not have an idle primary subframe, and the base station re-allocates the primary subframe in the same-channel community.
  • the frequency occupancy report returned by the neighboring station includes: an identifier ID of the neighboring station, and a community of the same frequency of the neighboring station The number, type, and distribution of primary subframes.
  • the base station includes a coexistence base station that requires a status update or a coexistence base station that starts to start.
  • a method for a base station to automatically perform resource selection and allocation including:
  • the base station performs 'redistribution on the frequency resource of the location community according to the obtained adjacency relationship of the location community and the frequency point allocation, and selects the idle frequency point as its working frequency point;
  • the base station compares the adjacency relationship of the same-community of the same frequency point and the primary subframe allocation information to the primary user in the same-channel community of the frequency point.
  • the frame is reassigned, and the idle primary subframe is selected as its working subframe.
  • the reallocating the frequency resources of the location community specifically includes:
  • the base station re-allocates the frequency resource of the location community, and when the number of frequency points required by the re-allocated location community is less than or equal to the maximum available frequency of the location community, the base station and the location The other base stations in the community negotiate and select the idle frequency as their working frequency.
  • the reallocating the frequency resources of the location community further includes:
  • the base station detects each frequency point that can be utilized, broadcasts a contact request at the respective frequency points, and obtains an adjacency relationship table of the location community;
  • the base station Determining, by the base station, whether there is an idle frequency point in the location community according to the adjacency relationship table of the location community, and if yes, the base station selects the idle frequency point as its working frequency point; otherwise, the base station The frequency resources of the location community are reallocated.
  • the method further includes:
  • the base station allows automatic frequency point selection and allocation, performing a process of re-allocating the frequency resource of the location community by the base station; otherwise, performing, by the base station, the frequency resource of the location community is not performed. The process of redistribution.
  • the reallocating the primary subframes in the same-channel community specifically includes:
  • the base station re-allocates the primary subframe of the co-channel community at the frequency point according to the set sequence, and if the number of primary subframes required to re-allocate the same-channel community after the primary subframe is less than or equal to the same-channel community
  • the maximum number of available primary subframes the base station negotiates with other base stations in the same-channel community, selects the frequency of the same-channel community as the working frequency point, and selects the idle primary subframe as its working subframe; otherwise And performing the reallocation and judgment processing on the main subframe of the same-community of the next frequency point.
  • the reallocating the primary subframes in the same-channel community further includes: the base station traversing all the frequency points of the community in its location, and sequentially collecting related information of the same-channel community at each frequency point, according to The frequency occupancy report returned by each neighboring station reports the number and distribution of the primary subframes of the same-channel community at each frequency point.
  • the adjacency relationship table of the same-frequency community of each frequency point may be included in the return report of the neighboring station, or may be The base station calculates itself according to the relevant information of the community in its location; The base station determines, according to the obtained sequence, the adjacency relation table of the same-community of the frequency point and the distribution of the primary subframe, whether there is an idle primary subframe in the same-channel community of each frequency point, if any And the base station selects a frequency point of the same-channel community as a working frequency point, and selects the idle primary subframe as its working subframe; otherwise, determines a common-community of the next frequency point, when all frequency points If the same community does not have an idle primary subframe, the base station redistributes the primary subframe in the same community.
  • the frequency occupancy report returned by the neighboring station includes: an identifier ID of the neighboring station, a number of primary subframes, a type, and a distribution of the same-community of the neighboring station.
  • the method further includes:
  • the base station includes a coexistence base station that requires a status update or a coexistence base station that starts to start.
  • a system for automatically selecting and allocating resources by a base station comprising a resource occupancy database, a channel selection module, and a resource optimization module, wherein:
  • the resource occupation database the adjacency relationship of the neighboring station and the location community it acquires, the frequency allocation information, the adjacency relationship of the same community, and the primary subframe allocation information are saved;
  • the channel selection module selects corresponding idle frequency or primary subframe resources for the base station according to the related information of the community or the same community of the base station where the base station is stored in the resource occupation database, or according to the reallocation processing result transmitted by the resource optimization module. ;
  • the resource optimization module according to the adjacency relationship of the community or the same community of the base station, reallocating the frequency resource in the location community or the primary subframe resource in the same community, and transmitting the re-allocation processing result to the channel selection module. .
  • the system further includes: a community information gathering module: performing scanning of each frequency point of the community where the base station is located, broadcasting and transmitting a contact request at each available frequency point, collecting the neighboring station of the base station and the location community and the same location Community information, passing the information obtained to the resource occupancy database.
  • a community information gathering module performing scanning of each frequency point of the community where the base station is located, broadcasting and transmitting a contact request at each available frequency point, collecting the neighboring station of the base station and the location community and the same location Community information, passing the information obtained to the resource occupancy database.
  • the system further includes: an inter-station communication control module: as a communication interface between the base stations, completing conversion of interface information inside and outside the base station.
  • the resource optimization module includes:
  • the frequency point optimization module according to the adjacency relationship of the community of the location of the base station, reallocating the frequency resource in the location community, and transmitting the re-allocation processing result to the channel selection module;
  • the primary subframe optimization module performs reallocation processing on the primary subframe resources in the same channel community according to the adjacency relationship of the same community in the same base station, and transmits the reassignment processing result to the channel selection module.
  • the channel selection module includes a 'resource negotiation module: the base station and other base stations negotiate to perform frequency or primary subframe switching according to a re-allocation processing result transmitted by the resource optimization module.
  • the present invention detects the idle frequency of the detected neighboring station through the initialization of the adjacent station discovery process, optimizes the frequency resource in the location community, and according to the set selection criteria.
  • the coexistence base station selects a channel resource, so that the coexistence base station (including the IBS) can re-adjust the distribution of the frequency resource in the common body according to the occupancy of the frequency resource in the location community when the idle frequency is not detected. To automatically get an available frequency point. It is avoided that the initial base station directly selects one frequency point to be multiplexed with other neighboring stations.
  • the present invention collects relevant information of the co-channel community of each frequency point at all frequency points in turn by the coexistence base station, optimizes the frequency point resources in the same-channel community, and selects the main-purpose base station according to the set selection criterion.
  • Sub-frame resources so that the coexistence base station can automatically re-adjust the distribution of the primary subframe resources in the same-channel community according to the distribution of the primary subframes in the same-channel community when the idle primary subframe is not detected.
  • the present invention can also optimize the distribution of the primary sub-frames in the same-community according to the information about the known co-channel community when the frequency distribution in the location community cannot be optimized.
  • the invention is beneficial to reasonably allocating available frequency resources within the location community and improving frequency utilization.
  • the working frequency point can be selected according to the minimum number of primary subframes in the same channel.
  • Figure 1 is a schematic diagram of the concept of a neighboring station
  • Figure 2 is a schematic diagram of the location community networking
  • Figure 3 is a schematic diagram of networking of the same community
  • Figure 4 is a schematic diagram of BS1, BS2 and BS3 forming a co-channel community
  • FIG. 5 is a schematic diagram showing a frame structure of time division multiplexing of a base station in the same channel shown in FIG. 4;
  • FIG. 6 is a schematic diagram showing a frame structure of time division multiplexing of a base station in the same channel shown in FIG. 4;
  • FIG. 7 is a schematic diagram showing a frame structure of time division multiplexing of a base station in the same channel shown in FIG. 4;
  • FIG. 8 is a schematic diagram of another frequency point resource that needs to be provided by the newly activated base station.
  • FIG. 9 is a schematic diagram of a new starting base station that does not need to provide additional frequency resources
  • FIG. 10 is a process flow diagram of an embodiment of the method of the present invention.
  • FIG. 11 is a schematic diagram of all active subframes occupied by a neighboring cell in a common channel according to an embodiment of the present invention
  • FIG. 12 is a schematic diagram of the primary base station after adjusting the primary subframe distribution in the same channel in the embodiment of the present invention
  • Schematic diagram of the occupancy of a subframe
  • FIG. 13 is a block diagram showing a specific implementation of the system of the present invention. Mode for carrying out the invention
  • the invention provides a method and system for automatically performing resource selection and allocation by a base station.
  • the main technical feature of the present invention is that the base station obtains the occupancy of each frequency point by means of CTS, etc., determines whether it is necessary to re-allocate the frequency points in the location common body, and determines its own working frequency point. When frequency division is required to be multiplexed, it is determined whether the primary subframe of the primary subframe needs to be re-allocated in the same community according to the resource distribution of the primary subframe in the same channel.
  • Step 10-1 The base station collects information about the community in its location.
  • the base station first collects relevant information about its location community.
  • the base station includes a coexisting base station (e.g., IBS) that starts up or a coexisting base station that requires status updates.
  • IBS coexisting base station
  • the IBS first scans and detects each frequency point, and sequentially broadcasts and sends a contact request message through a method such as CTS at each available frequency point to discover each neighboring station and obtain the original existing positions.
  • the member composition and frequency distribution of the community, on the basis of which the newly generated adjacency relation table of the location community in which it is located is obtained, and step 12-2 is performed.
  • Step 10-2 Obtain an idle frequency point without changing the working frequency of other base stations.
  • the IBS determines whether there are idle frequency points according to the frequency distribution of the home location community obtained by the above and the adjacency relationship table of the newly generated location community. At these idle frequency points, the IBS is required to detect interference of other base stations. And IBS will not disturb other base stations. If the above idle frequency point exists, the IBS directly selects one of the idle frequency points as its own exclusive working frequency point, and the selection manner may be random selection, or may select a frequency point with the smallest average noise signal strength, and the process ends; Otherwise, go to step 12-3. '
  • Step 10-3 Perform ACS (Automatic Channel Selection).
  • the IBS can determine whether it is necessary to reallocate the frequency resource of the location community according to the obtained adjacency relationship of the base station in the common location. That is, the ACS is performed on the frequency resource of the location community. Determines whether the number of frequency points required by the location community is less than or equal to the maximum available frequency point of the location community by reallocating the frequency points.
  • the method of reallocating the frequency point to the community where the IBS is located may be, but is not limited to, a greedy algorithm.
  • the result of the ACS calculation is to ensure the minimum number of frequency points required for all member base stations in the location community to enjoy a single frequency point, and the number of frequency points. How to combine allocation among base stations. Therefore, it can be judged whether it is possible to independently use a certain frequency point for each 3 ⁇ 4 station in the location community without being disturbed by the ACS optimization. Go to Step 10-4.
  • Step 10 Select the working frequency point according to the result of the ACS calculation and negotiate with other base stations.
  • the distribution of the frequency resources in the location community is redistributed. If re-divided
  • the number of frequency points required for the processed location community is less than or equal to the maximum number of available frequency points of the location community, that is, all base stations in the location community can use exclusive frequency resources without interference, and need not be adjacent to the IBS.
  • the station reuses a certain frequency point in time division.
  • the IBS negotiates with each base station to adjust their frequency points.
  • the content of the negotiation may include the target frequency point to be switched to, and the switching time.
  • the base station including the IBS
  • the operating frequency is set at the selected frequency point, and the process ends.
  • the IBS may select another frequency point and negotiate with another group of base stations. If all the frequency points cannot be negotiated successfully, go to steps 10 - 5.
  • the number of frequency points required by the optimized location community is greater than the maximum available frequency point of the location community, it means that no matter how the frequency distribution is re-adjusted, no frequency point can be vacated for the IBS, and the IBS can only be adjacent to the neighboring station. Time-division multiplexing a certain frequency point, and performing step 10-5.
  • Step 10-5 Collect information of the same-community community at all frequency points in turn.
  • the IBS sequentially traverses all frequency points in the location community, that is, sequentially broadcasts a query request message to each neighboring station by using CTS or the like at all frequency points, and requests each neighboring station to report its frequency occupancy report.
  • the frequency occupancy report reported by each neighbor station includes at least:
  • the adjacency relationship between the neighboring communities in which the neighboring stations are located may be reported by each neighboring station, or may be calculated by the IBS according to the adjacency relation table of the location community and the frequency distribution.
  • Step 10-6 Acquire an idle primary subframe without changing the primary subframe occupied by the other base station.
  • the IBS may, but is not limited to, order all the same-channel communities in descending order according to the number of primary subframes, and sequentially determine whether there are free masters in the same-channel community. Use sub-frames. If yes, the IBS works on the frequency point corresponding to the same community, and can directly occupy the idle subframe as its own working subframe, and the process ends; otherwise, the IBS continues to determine whether there is any idle in the next common community. Primary sub-frame.
  • steps 10-7 are performed.
  • Step 10-7 Perform ASS (Automatic Subframe Selection).
  • This step is similar to 10-3, except that the computed object is the primary subframe in the same community.
  • the IBS determines whether it is necessary to reallocate the primary subframe resources in the same community according to the obtained primary subframe in the same community. That is, the ASS is performed on the primary subframe resources in the same community. It is determined whether the number of primary subframes required by the same-channel community is less than or equal to the maximum number of available primary subframes of the same-channel community by reallocating the primary subframe.
  • the method of reallocating the primary subframe may be, but is not limited to, a greedy algorithm or the like.
  • the base station can also calculate and determine the common channel community in descending order according to the number of primary subframes.
  • ASS calculation is performed on the primary subframe resource in the same channel, and the result of the ASS calculation is to ensure the minimum number of primary subframes required for all the member base stations in the same community to enjoy a primary subframe, and How this number of primary subframes are allocated in combination between base stations. Therefore, it can be judged whether it is possible to independently use a certain primary subframe for each base station in the same community after the ASS optimization without mutual interference. Go to steps 10-8.
  • Step 10-8 Select the primary subframe according to the result of the ASS calculation and negotiate with other base stations.
  • the primary sub-frame resources in the same-channel community are reallocated according to the ASS calculation result. If the number of primary subframes required to re-allocate the processed co-channel community is less than or equal to the number of existing primary subframes of the same-channel community, that is, all base stations in the same-channel community can use each other without interference. If you use the primary subframe resource, you do not need to add a new primary subframe to the IBS. The IBS then negotiates with the base stations to adjust the primary subframes they use. The content of the negotiation may include the target primary subframe to be switched to, and the switching time. After the negotiation is successful, the base station (including IBS) that needs to switch the primary subframe is switched to the new primary subframe, and the working interval is set on the selected primary subframe, and the process ends.
  • the same common community may be performed for the next common community. Calculate, judge, and negotiate, return to step 10-7.
  • the current primary subframe number is 3, and the neighboring stations (BS1, BS2, and BS4) of the IBS occupy all three primary subframes, and there is no idle primary subframe. Available for IBS.
  • the occupancy of the primary subframe in the same channel can be modified to be distributed as shown in FIG. 12, so that an available primary subframe can be vacated for use by the IBS.
  • Steps 10-9 select the same community, and negotiate with each member to increase the primary subframe.
  • the IBS can only select a certain frequency point, that is, select a corresponding common community, and negotiate with the members to add a primary subframe.
  • the criteria for selecting a frequency point may be, but is not limited to, being the least number of existing primary subframes. Because the base stations in the entire location are synchronized, they have the same frame length. The smaller the number of subframes, the larger the available bandwidth of each base station.
  • the present invention may further improve the foregoing processing flow, that is, separately performing the foregoing information according to the location community for the coexistence base station of the status update or the coexistence base station that starts to be started, reallocating the frequency resource of the location community, and selecting idle.
  • the frequency of the frequency as the working frequency of the base station;
  • the coexistence base station of the status update or the coexistence base station that starts to be activated separately performs the above-mentioned information according to the same-channel community, reallocates the primary subframe in the same-channel community, and selects the idle primary subframe as its work. The process of a sub-frame.
  • the status update coexistence base station or the coexisting base station starting to start can obtain an available channel, where the channel is an exclusive frequency point, or a master Use sub-frames.
  • the invention also provides a system for resource selection and allocation by a base station for status update, the system capable of monitoring location common The channel conditions in the body, the dynamic adjustment of the support frequency points, and the redistribution of the primary subframe resources according to the information of the respective community at the location.
  • the structure of the specific implementation of the system is as shown in FIG. 13 , and includes the following module: a resource occupation database: the related information of the neighboring station acquired by the base station and the location community and the same community, and the related information includes the ID of the neighboring station, The working frequency of the neighboring station, the adjacency relationship of the community in which it is located, and the number and distribution of the primary subframes of the same community.
  • the channel selection module selects corresponding idle frequency or primary subframe resources for the base station according to the related information of the community or the same community of the base station where the base station is stored in the resource occupation database, or according to the reallocation processing result transmitted by the resource optimization module. . Includes: Resource negotiation module.
  • the resource negotiation module the base station negotiates with other base stations to perform frequency point or primary subframe switching according to the re-allocation processing result transmitted by the resource optimization module.
  • the resource optimization module according to the adjacency relationship of the community or the same community of the base station, reallocating the frequency resource in the location community or the primary subframe resource in the same community, and transmitting the re-allocation processing result to the channel selection module. . Including: frequency optimization module, main sub-frame optimization module.
  • the frequency point optimization module according to the adjacency relationship of the community where the base station is located, reallocating the frequency resources in the location community, and transmitting the re-allocation processing result to the channel selection module;
  • the primary subframe optimization module performs reallocation processing on the primary subframe resources in the same channel community according to the adjacency relationship of the same community in the same base station, and transmits the re-allocation processing result to the channel selection module.
  • the community information gathering module completes the scanning of the frequency points of the community where the base station is located, broadcasts and sends a contact request at each available frequency point, collects the information of the neighboring station of the base station and the community of the same location and the community of the same, and will obtain The information is passed to the resource occupancy database.
  • Inter-station communication control module As a communication interface between base stations, the conversion of interface information inside and outside the base station is completed.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et système de sélection et d'attribution automatiques de ressources par une station de base. Ce procédé comprend les étapes suivantes : une station de base réattribue une ressource de point de fréquence de communauté d'emplacement conformément à une relation d'adjacence et à l'attribution de points de fréquence de la communauté d'emplacement acquis par la station de base et la station de base sélectionne un point de fréquence libre comme point de fréquence de travail ; lorsqu'il n'y a aucun point de fréquence libre pour la station de base, cette dernière réattribue des sous-trames de communauté dans la même voie conformément à la relation d'adjacence et aux informations d'attribution de sous-trame de communauté dans la même voie du point de fréquence acquises par la station de base et la station de base sélectionne une sous-trame libre comme sous-trame de travail. Grâce à la présente invention, les stations de base partagées (y compris les stations de base initiales (IBS)) peuvent acquérir automatiquement un point de fréquence utilisable conformément à l'état d'occupation de la ressource de point de fréquence dans la communauté d'emplacement ou acquérir automatiquement une sous-trame utilisable conformément à l'état d'occupation de la ressource de sous-trame dans la communauté dans la même voie.
PCT/CN2006/003108 2006-01-16 2006-11-20 Procédé et système permettant de sélection et d'attribution automatiques de ressources WO2007082440A1 (fr)

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