WO2018133631A1 - 一种非授权频谱资源分配方法及装置 - Google Patents

一种非授权频谱资源分配方法及装置 Download PDF

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Publication number
WO2018133631A1
WO2018133631A1 PCT/CN2017/118712 CN2017118712W WO2018133631A1 WO 2018133631 A1 WO2018133631 A1 WO 2018133631A1 CN 2017118712 W CN2017118712 W CN 2017118712W WO 2018133631 A1 WO2018133631 A1 WO 2018133631A1
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lte
period
unlicensed spectrum
time period
value
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PCT/CN2017/118712
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English (en)
French (fr)
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王鑫芯
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京信通信系统（中国）有限公司
京信通信系统（广州）有限公司
京信通信技术(广州)有限公司
天津京信通信系统有限公司
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Publication of WO2018133631A1 publication Critical patent/WO2018133631A1/zh

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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
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and an apparatus for allocating unlicensed spectrum resources.
  • LTE Unlicensed LTE Unlicensed
  • LTE-U technology can bring higher data rates, seamless service consistency, and reliable mobility, it also faces many challenges.
  • the primary challenge is the interference between the LTE-U system and existing systems on the unlicensed band (such as Wi-Fi systems).
  • the Wi-Fi system adopts a medium access control (MAC) protocol based on the competition mechanism, and the LTE-U system adopts a centralized control resource scheduling strategy. Therefore, LTE-U will cause continuous interference to the Wi-Fi system, thereby drastically deteriorating the performance of the Wi-Fi system.
  • the LBT Listen Before Talk
  • This mechanism avoids interference to the Wi-Fi system and limits the maximum channel occupancy time by allowing the LTE-U base station to listen to the channel before transmission.
  • this mechanism will result in low channel utilization in the case of dense deployment of LTE-U, which not only reduces the capacity of the LTE-U system, but also seriously degrades the performance of the Wi-Fi system.
  • the embodiment of the invention provides a method and a device for allocating unlicensed spectrum resources, which can improve the channel utilization rate while ensuring that the LTE-U system and other mobile communication systems occupy the channel resources fairly and do not interfere with each other. Furthermore, the purpose of increasing the capacity of the LTE-U system.
  • an embodiment of the present invention provides an unlicensed spectrum resource allocation method, where the method includes: dividing an LTE-U base station in an LTE-U network into N sets, wherein the same set of LTE-U base station network coverage The area is continuous, and N is a positive integer;
  • the method further includes: for any one of the N sets, a DRX activation period after the UE in the coverage network coverage area is configured is consistent with a time period corresponding to the set.
  • the network side device numbers the N sets from zero, obtains the set identifier of each set, and calculates an initial time for each set to occupy the unlicensed spectrum resource in the period T according to the formula 1;
  • N is the total number of sets
  • i is the number
  • T is the time period
  • Ton_i is the initial time when the set whose set identifier is i occupies the unlicensed spectrum resource
  • the different time periods in which each set occupies the unlicensed spectrum resource in the same period T are determined according to the initial time when each set starts to occupy the unlicensed spectrum resource and the preset time length of each set occupies the unlicensed band spectrum resource.
  • the method further includes: obtaining, for each set, a signal energy value in an unlicensed frequency band spectrum detected by the LTE-U base station of each set in a specified time period, where the specified time period refers to each period The time in T except for the time period in which the set occupies the unlicensed spectrum resource;
  • the network side device sums the obtained signal energy values to obtain a total signal energy value
  • the set disables the M period T of the unlicensed spectrum resource, and the value of M is a positive integer
  • the time period corresponding to the set is shortened
  • the time period corresponding to the set is lengthened, wherein the third threshold is smaller than the first threshold, and the adjusted set is The length of the corresponding time period is less than the period T.
  • the embodiment of the present invention further provides an unlicensed spectrum resource allocation apparatus, where the apparatus includes:
  • a dividing unit configured to divide the LTE-U base station in the LTE-U network into N sets, wherein the LTE-U base station network coverage area of the same set is continuous, and N is a positive integer;
  • the allocation unit is configured to determine different time periods in which the respective sets occupy the unlicensed spectrum resources in the same period T, so that the LTE-U base stations in each set allocate unlicensed spectrum resources to the accessed UEs in the corresponding time period,
  • the time period of each set is smaller than the period T, and the union of the time periods of the N sets is equal to the period T.
  • the apparatus further includes: for any one of the N sets, a DRX activation period after the UE in the coverage network coverage area is configured is consistent with a time period corresponding to the set.
  • the distribution unit is specifically for:
  • the N sets are numbered from zero, and the set identifier of each set is obtained, and the initial time when each set starts to occupy the unlicensed spectrum resource in the period T is calculated according to the formula 1.
  • the device further includes:
  • An acquiring unit configured to acquire, for each set, a signal energy value in an unlicensed frequency band spectrum detected by the LTE-U base station of each set in a specified time period, where the specified time period refers to each period T except The time when the set occupies a time period corresponding to the unlicensed spectrum resource;
  • the calculating unit is configured to calculate a ratio of the detection bandwidth of the signal energy value greater than the preset energy threshold to the unlicensed carrier bandwidth, to obtain a bandwidth ratio value, where the value of the detection bandwidth is not greater than the use of the unlicensed frequency band carrier of the LTE-U base station Bandwidth, and the detection bandwidth can divisible the use bandwidth of the unlicensed band carrier of the LTE-U base station;
  • an adjusting unit configured to adjust a duration of the time period corresponding to the set according to the signal energy value and the bandwidth ratio value.
  • the adjustment unit is specifically used to:
  • the set disables the M period T of the unlicensed spectrum resource, and the value of M is a positive integer
  • the time period corresponding to the set is shortened
  • the time period corresponding to the set is lengthened, wherein the third threshold is smaller than the first threshold, and the adjusted set is The length of the corresponding time period is less than the period T.
  • the embodiment of the present application provides a network element, where the network element may be the network side device, including: a communication interface, a processor, a bus, and a memory, where the processor call is stored in the The instructions in the memory perform the following processing:
  • the LTE-U base station in the LTE-U network is divided into N sets, wherein the LTE-U base station network coverage area of the same set is continuous, and N is a positive integer;
  • the DRX activation period after the UE in the coverage network coverage area is configured is consistent with the time period corresponding to the set.
  • the processor is specifically configured to: number N sets from zero to obtain a set identifier of each set, and calculate, according to formula 1, each spectrum starts to occupy an unlicensed spectrum in the period T. The initial time of the resource.
  • the processor is further configured to:
  • the processor is specifically configured to: sum the acquired signal energy values to obtain a total signal energy value; if the total signal energy value is greater than a first threshold, and the bandwidth ratio value is greater than When the second threshold is used, the set disables the M period T of the unlicensed spectrum resource, and the value of M is a positive integer;
  • the time period corresponding to the set is shortened
  • the time period corresponding to the set is lengthened, wherein the third threshold is smaller than the first threshold, and the adjusted set is The length of the corresponding time period is less than the period T.
  • an embodiment of the present invention provides a non-transitory computer readable storage medium, where the non-transitory computer readable storage medium stores computer instructions, where the computer instructions are used to cause the computer to execute any of the above Unlicensed spectrum resource allocation method.
  • an embodiment of the present invention provides a computer program product, the computer program product comprising a computing program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions, when the program instruction is The computer, when executed, causes the computer to perform the unlicensed spectrum resource allocation method of any of the above.
  • the LTE-U base station configured in different areas on the network side alternately occupies the unlicensed spectrum resources, that is, the network side divides the LTE-U base station in the LTE-U network into several sets in advance, and then configures different sets respectively. Different time periods of each period occupy unlicensed spectrum resources, that is, the time domain resources are divided, so that different LTE-U base stations in the LTE-U network can periodically occupy unlicensed spectrum resources in different time periods.
  • the LTE terminal accessing the LTE-U system can access the unlicensed frequency band for communication, and when the LTE-U base station does not occupy the unlicensed spectrum resource, access the nearby Wi
  • the Wi-Fi terminal of the -Fi base station can access the unlicensed frequency band for communication, thereby achieving friendly coexistence between LTE-U and Wi-Fi, and at the same time, since the LTE-U base station always occupies unlicensed spectrum resources, implementing LTE- U provides continuous services in unlicensed frequency bands, achieving the goal of increasing the capacity of LTE-U systems.
  • FIG. 1 is a schematic diagram of a scenario in which a LTE-U system and a Wi-Fi system coexist in the prior art
  • FIG. 2 is a schematic flowchart of a method for allocating unlicensed spectrum resources according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of dividing an LTE-U base station in a network coverage area according to an embodiment of the present disclosure
  • FIG. 4 is a schematic diagram of periodically dividing time segments for different sets according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of an unlicensed spectrum resource allocation apparatus according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic diagram of a network element architecture according to an embodiment of the present invention.
  • a terminal a device that provides voice and/or data connectivity to a user, including a wireless terminal or a wired terminal.
  • the wireless terminal can be a handheld device with wireless connectivity, or other processing device connected to a wireless modem, and a mobile terminal that communicates with one or more core networks via a wireless access network.
  • the wireless terminal can be a mobile phone (or "cellular" phone) and a computer with a mobile terminal.
  • the wireless terminal can also be a portable, pocket, handheld, computer built-in or in-vehicle mobile device.
  • the wireless terminal may be part of a mobile station (English: Mobile Station), an access point (English: Access Point), or a user equipment (English: User Equipment, UE for short).
  • FIG. 1 shows a situation in which an LTE-U system and a Wi-Fi system coexist in the same area in the prior art, wherein an LTE user represented by the LTE terminal 201 is present in the LTE base station 100 deployment environment.
  • the LTE base station 100 has a Wi-Fi base station 101 and a corresponding Wi-Fi terminal 202, and a Wi-Fi base station 102 and a corresponding Wi-Fi terminal 203.
  • the Wi-Fi base station 101 has strong interference to the LTE base station 100
  • the Wi-Fi base station 102 has weak interference to the LTE base station 100, which means that the base station can discover the Wi-Fi base station 101 by simple techniques such as spectrum energy detection, but cannot pass the spectrum energy.
  • a simple technique such as detection discovers the Wi-Fi base station 102.
  • both the Wi-Fi base stations 101 and 102 can generate strong interference to the LTE terminal 201; the LTE base station 100 generates strong interference to all non-LTE system receiving and transmitting devices in the LTE system service range.
  • the LTE and Wi-Fi systems work as follows:
  • each Wi-Fi system uses the CSMA/CA (Carrier Sense Multiple Access with Collision Detection) mechanism to share the time-frequency resources of the channel according to the 802.11;
  • CSMA/CA Carrier Sense Multiple Access with Collision Detection
  • Scenario 2 When the LTE system works, the LTE base station unconditionally occupies all available time-frequency resources for data transmission after completing the control signaling transmission; since the LTE base station has strong interference to the system in the frequency band of the LTE system service range Each Wi-Fi system performs an infinite backoff based on the CSMA/CA mechanism until the LTE system does not work, and moves to case 1.
  • the embodiment of the present invention provides an unlicensed spectrum resource allocation method, which is performed by the network side device, and is mainly configured by the network side to configure different LTE-U base stations to occupy unauthorized The time of the spectrum resource, so that the LTE-U base station and the Wi-Fi base station can equally occupy the unlicensed band channel resources for data transmission.
  • the implementation method includes:
  • Step S101 The LTE-U base station in the LTE-U network is divided into N sets, wherein the LTE-U base station network coverage area of the same set is continuous, and N is a positive integer.
  • Step S102 determining that each set occupies different time segments of the unlicensed spectrum resource in the same period T, so that the LTE-U base station in each set allocates unlicensed spectrum resources to the accessed UE in the corresponding time period, where The time period of each set is smaller than the period T, and the union of the time periods of the N sets is equal to the period T.
  • the LTE-U base stations are sequentially numbered starting from 0 according to the spatial positional relationship of the LTE-U base station, the numbers of the adjacent LTE-U base stations are consecutive, and then the numbered LTE-U base stations are used.
  • a packet in which the coverage area of the LTE-U base station belonging to the same packet is continuous, and the coverage area of the LTE-U base station of different packets is different. Assume that, as shown in FIG. 3, the LTE-U base station in the set area is divided into three sets as shown in FIG.
  • each set includes a plurality of LTE-U base stations adjacent to each other, so that the network side device can Periodically dividing the unlicensed spectrum resources into corresponding sets of different time segments, for example, one period T is divided into three time periods T1, T2, and T3, wherein in the time period T1, LTE in the set 1
  • the U base station can use the unlicensed spectrum resource.
  • the LTE-U base station in the set 2 can use the unlicensed spectrum resource.
  • the LTE-U base station in the set 3 can use the unlicensed spectrum resource, which is visible.
  • the LTE-U base station in the ensemble 1 only occupies the LTE-U unlicensed spectrum resource in the time period T1.
  • each Wi-Fi base station After the LTE base station completes the control signaling transmission in the T1 time period, the LTE base station unconditionally occupies all available time-frequency resources. Data transmission; since the LTE-U base station has strong interference to the system in the frequency band of the LTE system service range, each Wi-Fi system performs infinite backoff based on the CSMA/CA mechanism until the LTE system does not work, in the T1 time period.
  • each Wi-Fi base station in the set 1 May be employed when the CSMA / CA mechanism for shared channel resources in accordance with a predetermined frequency 802.11.
  • the determining, by the respective groups, different time periods of occupying the unlicensed spectrum resources in the same period T includes:
  • the N sets are numbered from zero, and the set identifiers of each set are obtained, and the initial time when each set starts to occupy the unlicensed spectrum resources in the period T is calculated according to the formula 1.
  • N is the total number of sets
  • i is the number
  • T is the time period
  • Ton_i is the initial time when the set whose set identifier is i occupies the unlicensed spectrum resource.
  • the different time that each set occupies the unlicensed spectrum resource in the same period T is determined. segment.
  • the unlicensed spectrum resource occupation duration of each set of LTE-U base stations is recorded as Ton ; the LTE-U base station in set 1 starts to occupy unlicensed spectrum resources from Ton_1 , occupying Ton Then, the LTE-U base station in the set 2 occupies the unlicensed spectrum resource from the Ton_2 , and stops occupying after the Ton is occupied, until the LTE-U base station in the set n starts to occupy the unlicensed spectrum resource from the Ton_n. , take up the Ton and stop taking up.
  • the unlicensed band carrier of the base station occupies a duration T on , and the value is not greater than the period T. It can be seen from FIG.
  • the LTE-U base stations belonging to the same set have the same start time of the unlicensed band carrier, and the initial time of the different sets of unlicensed spectrum resources to start occupying resources is different, and there is always LTE at any time in the period T.
  • the -U base station occupies unlicensed spectrum resources.
  • the period T at any time, there is always an unlicensed band carrier of the base station, and the LTE system resources can be fully utilized, and when the partial set does not occupy the unlicensed spectrum resources, the Wi-Fi base station around the set It can occupy unlicensed spectrum resources and realize fair use of shared channels between LTE-U and Wi-Fi systems.
  • it ensures that LTE-U networks can continue to provide services in unlicensed frequency bands.
  • the prior art mainly uses the same on/off time for the entire network, that is, all LTE-U base stations in the set area are in the All the unlicensed spectrum resources are occupied in the set time period, and after occupying the set time period, all the unlicensed spectrum resources are stopped in the subsequent set time period.
  • the LTE-U system stops occupying unlicensed spectrum resources, the service provided by the LTE-U system in the unlicensed band is interrupted, which will inevitably affect the LTE terminal that accesses the unlicensed band carrier. In severe cases, the LTE terminal may even drop the call. The user experience is reduced and the overall performance of the network is also affected.
  • each base station determines and adjusts the unlicensed spectrum resource occupation time by itself, it may be considered that there may be multiple LTE-U base stations affecting a certain Wi-Fi base station. If the occupied time of the unlicensed frequency band carriers of these base stations are inconsistent, the Wi may be seriously affected. -Fi system transfer.
  • the LTE-U base station affecting a certain Wi-Fi base station can be guaranteed only at the same time. The segment will occupy the unlicensed spectrum resources and will not be occupied outside of the time period, so the Wi-Fi base station can access the unlicensed spectrum resources outside the time period. In this way, LTE-U can ensure continuous service in the unlicensed frequency band, and can meet the data transmission time requirements of both LTE-U and Wi-Fi.
  • a DRX (Discontinuous Reception) activation period after the UE in the coverage network coverage area is configured is consistent with a time period corresponding to the set.
  • Packet-based data streams are typically bursty, with data being transmitted over a period of time, but no data is transmitted for the next extended period of time.
  • the power consumption can be reduced by stopping the reception of the PDCCH (Physical Downlink Control Channel), which stops the PDCCH blind detection, thereby improving battery life.
  • PDCCH Physical Downlink Control Channel
  • the basic mechanism of DRX is to configure a DRX cycle for UEs in the RRC_CONNECTED state.
  • the DRX period consists of "On Duration” and "Opportunity for DRX”: during the "On Duration” time, the UE listens and receives the PDCCH; during the "Opportunity for DRX” time, the UE does not receive the PDCCH.
  • the DRX activation period after the UE in the aggregation network coverage area is configured is consistent with the time period corresponding to the set, that is, the DRX activation of the LTE terminal in the set 1 in the T1 time period.
  • the period is also the T1 time period, so that the data transmission under the LTE-U system can be ensured, and the utilization of spectrum resources is further improved.
  • the time length of each set in the above-mentioned steps occupying the unlicensed frequency band spectrum resource may be adaptively adjusted, and the adjustment method is: for each set, the LTE-U base station acquiring each set is detected within a specified time period.
  • the LTE-U base station in the set 1 has a signal energy value in the unlicensed band spectrum in the remaining time period of the period T outside the T1 time period, and The signal energy within the unlicensed spectrum resource is also detected during the remaining time period.
  • detection is performed in units of detection bandwidth, and at least one signal energy value is acquired.
  • the detection bandwidth is not greater than the used bandwidth of the unlicensed band carrier of the base station, and may be used in addition to the used bandwidth of the licensed band carrier.
  • the signal energy in the unlicensed spectrum resource is detected for processing, and the acquired signal energy values are specifically summed to obtain a total signal energy value;
  • the set disables the M period T of the unlicensed spectrum resource, and the value of M is a positive integer
  • the time period corresponding to the set is shortened
  • the time period corresponding to the set is lengthened, wherein the third threshold is smaller than the first threshold, and the adjusted set is The length of the corresponding time period is less than the period T.
  • the obtained at least one signal energy value is summed to obtain a signal energy value in a carrier bandwidth of the unlicensed frequency band of the base station; and at least one of the at least one signal energy value obtained by the statistics is greater than the detection bandwidth range of the preset signal strength threshold, and the calculation is performed.
  • the ratio of the detected detection bandwidth to the configured bandwidth of the unlicensed band carrier of the base station is obtained, and the proportion of the bandwidth with a large signal strength is obtained.
  • the network side device presets the adjustment period, and when the adjustment period expires, adjusts the duration T on which each set occupies the unlicensed frequency point carrier, where the adjustment period is not less than the time of N periods T, where N is A positive integer. After the total signal energy value and the detection bandwidth are obtained, it is determined that if the total signal energy value is greater than the first threshold, and the bandwidth ratio value is greater than the second threshold, it indicates that the UE connected to the Wi-Fi base station is smaller than the UE. In many cases, the Wi-Fi system is occupying unlicensed spectrum resources for data transmission, so it is possible to temporarily adjust the collection to no longer occupy unlicensed spectrum resources for a subsequent period of time.
  • the bandwidth ratio value is not greater than the second threshold, it is indicated that a UE that is partially connected to the Wi-Fi base station in the set is performing data transmission, and thus is appropriately reduced.
  • the step size ⁇ T down decreases Ton . Otherwise, it is possible to increase the Ton by increasing the ⁇ T up step size, and the adjusted Ton cannot exceed the time setting of the period T.
  • the LTE-U base station adjusts the duration of the unlocking of the unlicensed band carrier according to the signal energy detection processing result in the bandwidth of the unlicensed band, thereby adaptively adjusting the on/off state of the unlicensed band carrier, and achieving LTE in the unlicensed band range.
  • -U base station and Wi-Fi share the shared channel for data transmission, and can balance the data transmission time requirements of both parties to achieve fair distribution of channels.
  • the embodiment of the present invention further provides an unlicensed spectrum resource allocation apparatus, and the apparatus can perform the foregoing method embodiments.
  • the apparatus provided by the embodiment of the present invention includes: a dividing unit 401 and an allocating unit 402, wherein:
  • the dividing unit 401 is configured to divide the LTE-U base station in the LTE-U network into N sets, wherein the LTE-U base station network coverage area of the same set is continuous, and N is a positive integer;
  • the allocating unit 402 is configured to determine different time periods in which the respective sets occupy the unlicensed spectrum resources in the same period T, so that the LTE-U base stations in each set allocate unlicensed spectrum resources to the accessed UEs in the corresponding time period.
  • the time period of each set is smaller than the period T, and the union of the time periods of the N sets is equal to the period T.
  • the DRX activation period after the UE in the coverage network coverage area is configured is consistent with the time period corresponding to the set, for any one of the N sets.
  • the allocating unit 402 is specifically configured to: number N sets from zero, obtain a set identifier of each set, and calculate an initial time for each set to start occupying unlicensed spectrum resources in the period T according to formula 1. ;
  • N is the total number of sets
  • i is the number
  • T is the time period
  • Ton_i is the initial time when the set whose set identifier is i occupies the unlicensed spectrum resource
  • the different time periods in which each set occupies the unlicensed spectrum resource in the same period T are determined according to the initial time when each set starts to occupy the unlicensed spectrum resource and the preset time length of each set occupies the unlicensed band spectrum resource.
  • the device further includes: an obtaining unit 403, configured to acquire, for each set, a signal energy value in an unlicensed frequency band spectrum detected by the LTE-U base station of each set in a specified time period,
  • the specified time period refers to a time period in each period T except that the set occupies a time period corresponding to the unlicensed spectrum resource;
  • the calculating unit 404 is configured to calculate a ratio of the detection bandwidth of the signal energy value that is greater than the preset energy threshold to the unlicensed carrier bandwidth, to obtain a bandwidth ratio value, where the value of the detection bandwidth is not greater than the unlicensed frequency band carrier of the LTE-U base station. Using bandwidth, and the detection bandwidth can divisible the use bandwidth of the unlicensed band carrier of the LTE-U base station;
  • the adjusting unit 405 is configured to adjust a duration of the time period corresponding to the set according to the signal energy value and the bandwidth ratio value.
  • the adjusting unit 405 is specifically configured to: sum the signal energy values acquired by the acquiring unit to obtain a total signal energy value;
  • the set disables the M period T of the unlicensed spectrum resource, and the value of M is a positive integer
  • the time period corresponding to the set is shortened
  • the time period corresponding to the set is lengthened, wherein the third threshold is smaller than the first threshold, and the adjusted set is The length of the corresponding time period is less than the period T.
  • the LTE-U base stations in different areas of the network side alternately occupy the unlicensed spectrum resources, that is, the network side divides the LTE-U base stations in the LTE-U network into several sets in advance, and then configures The different sets occupy the unlicensed spectrum resources in different time periods of each period, that is, the time domain resources are divided, so that different LTE-U base stations in the LTE-U network can periodically occupy in different time periods.
  • Unlicensed spectrum resources such that when the LTE-U base station occupies unlicensed spectrum resources, the LTE-U base station can access the unlicensed frequency band for communication.
  • the LTE-U base station When the LTE-U base station does not occupy the unlicensed spectrum resources, the LTE-U base station does not occupy the unlicensed spectrum resources. UEs entering nearby Wi-Fi base stations can access unlicensed frequency bands for communication, thereby achieving friendly coexistence between LTE-U and Wi-Fi, and at the same time, LTE-U base stations are always occupying unlicensed spectrum resources to implement LTE. -U provides continuous services in unlicensed frequency bands, achieving the goal of increasing the capacity of LTE-U systems.
  • FIG. 6 is a schematic structural diagram of a network element provided by the present invention.
  • the network element 500 includes: a communication interface 501, a processor 502, a memory 503, and a bus system 504.
  • the memory 503 is configured to store a computer program, and may also store some data information and the like received by the network element.
  • the computer program can include program code, which can include computer operating instructions and the like.
  • the memory 503 may be a random access memory (RAM) or a non-volatile memory (NVM), such as at least one disk storage. Only one memory is shown in the figure, and of course, the memory can be set to a plurality as needed.
  • Memory 503 can also be a memory in processor 502.
  • the memory 503 can store elements, executable modules or data structures, etc., or a subset thereof, or an extended set thereof:
  • Operation instructions include various operation instructions for implementing various operations.
  • Operating system Includes a variety of system programs for implementing various basic services and handling hardware-based tasks.
  • the processor 502 is used for operation of the network element 500, and the processor 802 may also be referred to as a central processing unit (CPU).
  • CPU central processing unit
  • the communication interface 501 is configured to perform processing such as information transmission and reception on other devices connected to the network element 500.
  • the bus system 504 can include a power bus, a control bus, a status signal bus, and the like in addition to the data bus.
  • various buses are labeled as bus system 504 in the figure. For ease of representation, only the schematic drawing is shown in FIG.
  • Processor 502 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the foregoing method may be completed by hardware integrated logic circuits in the processor 502 or instructions in software form.
  • the processor 502 described above may be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or discrete hardware. Component.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium can be located in the memory 503, and the processor 502 can read the information stored in the memory 503 and perform the above method steps in conjunction with the hardware.
  • the processor provided in this embodiment may divide the LTE-U base station in the LTE-U network into N sets, and then determine different time periods in which each set occupies unlicensed spectrum resources in the same period T, so that each set The LTE-U base station allocates unlicensed spectrum resources to the accessed UEs in the corresponding time period, wherein the time period of each set is smaller than the period T, and the union of the time periods of the N sets is equal to the period T.
  • the network element in the embodiment of the present application divides the LTE-U base station in the LTE-U network into a plurality of sets in advance, and then configures different sets to occupy unlicensed spectrum resources in different time periods of each cycle, That is, when the LTE-U base station occupies unlicensed spectrum resources, the LTE-U base station can occupy the unlicensed spectrum resources in different time periods.
  • the LTE terminal accessing the LTE-U system can access the unlicensed frequency band for communication.
  • the Wi-Fi terminal accessing the nearby Wi-Fi base station can access the unauthorized
  • the frequency band communicates to achieve friendly coexistence between LTE-U and Wi-Fi.
  • the present invention also provides a non-transitory computer readable storage medium storing computer instructions for causing the computer to perform the non-any of the above Authorized spectrum resource allocation method.
  • the present invention also provides a computer program product comprising a computing program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions, when the program instructions are executed by a computer And causing the computer to perform the unlicensed spectrum resource allocation method according to any one of the above.

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Abstract

本发明公开一种非授权频谱资源分配方法及装置，该方法包括：将LTE-U网络中的LTE-U基站划分为N个集合，其中，同一集合的LTE-U基站网络覆盖区域连续；确定各个集合在同一周期T内占用非授权频谱资源的不同的时间段，以使各个集合内的LTE-U基站在对应的时间段为接入的UE分配非授权频谱资源，其中，每个集合的时间段均小于所述周期T，N个集合的时间段的并集等于所述周期T，用以实现在保证LTE-U系统与其他移动通信系统公平占用信道资源，相互不发生干扰的前提下，又能够提高信道利用率，进而提高LTE-U系统容量的目的。

Description

一种非授权频谱资源分配方法及装置
本申请要求在2017年01月18日提交中华人民共和国知识产权局、申请号为201710039516.0，发明名称为“一种非授权频谱资源分配方法及装置”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
本发明涉及通信领域，尤其涉及一种非授权频谱资源分配方法及装置。
背景技术
随着移动设备和多种移动应用的爆发式增长，无线运营商面临着移动数据流量快速增长带来的对系统容量和保证用户服务质量的严峻考验。为了应对海量数据的巨大挑战，运营商需要获取更多的频谱资源。然而，频谱作为一种珍贵资源，授权频段常常十分昂贵。随着载波聚合技术的发展，运营商将目标放在了免费的非授权频段，即LTE Unlicensed(LTE-U)技术。作为LTE Release13中的一部分，LTE-U可以在统一的LTE网络下允许用户同时接入授权和非授权频段。
虽然LTE-U技术可以带来更高的数据速率、无缝的服务一致性以及可靠的移动性，但同样面临着许多挑战。首要面临的挑战就是LTE-U系统和免授权频段上已存在的系统(例如Wi-Fi系统)存在相互干扰的问题。由于Wi-Fi系统采用了基于竞争机制的媒体访问控制(Medium Access Control，MAC)协议，而LTE-U系统采用集中控制的资源调度策略。因而，LTE-U会对Wi-Fi系统带来持续的干扰，从而使Wi-Fi系统的性能急剧恶化。同时，为了保证公平性，在LTE Release 13中已经确定了采用LBT(Listen Before Talk，先听后讲)机制。该机制通过让LTE-U基站在发送前对信道进行监听来避免对Wi-Fi系统的干扰并限定了最大信道占用时间。但该机制在LTE-U密集部署的情况 下会造成信道利用率低，不仅降低了LTE-U系统的容量，同时使Wi-Fi系统的性能严重恶化。
综上，亟需一种非授权频谱资源分配方法，可以保证LTE-U系统与其他移动通信系统公平占用信道资源，相互不发生干扰的前提下，又能够提高信道利用率，进而提高LTE-U系统容量的目的。
发明内容
本发明实施例提供一种非授权频谱资源分配方法及装置，用以实现在保证LTE-U系统与其他移动通信系统公平占用信道资源，相互不发生干扰的前提下，又能够提高信道利用率，进而提高LTE-U系统容量的目的。
第一方面，本发明实施例提供一种非授权频谱资源分配方法，该方法包括：将LTE-U网络中的LTE-U基站划分为N个集合，其中，同一集合的LTE-U基站网络覆盖区域连续，N为正整数；
确定各个集合在同一周期T内占用非授权频谱资源的不同的时间段，以使各个集合内的LTE-U基站在对应的时间段为接入的UE分配非授权频谱资源，其中，每个集合的时间段均小于所述周期T，N个集合的时间段的并集等于所述周期T。
进一步地，该方法还包括：针对所述N个集合中的任意一个集合，所述集合网络覆盖区域内的UE被配置之后的DRX激活期与所述集合对应的时间段一致。
在一种可能的设计中，网络侧设备对N个集合从零开始进行编号，得到每个集合的集合标识，按照公式一计算在周期T内每个集合开始占用非授权频谱资源的初始时间；
所述公式一为：
T on_i＝floor(T/N)×i
其中，floor代表向下取整，N为集合总数，i为编号，T为时间周期，T on_i 为集合标识为i的集合占用非授权频谱资源的初始时间；
根据每个集合开始占用非授权频谱资源的初始时间和预设的每个集合占用非授权频段频谱资源的时间长度，确定每个集合在同一周期T内占用非授权频谱资源的不同的时间段。
进一步地，该方法还包括：针对每个集合，获取每个集合的LTE-U基站在指定时间段内检测到的非授权频段频谱内的信号能量值，所述指定时间段是指每个周期T中除了所述集合占用非授权频谱资源对应的时间段之外的时间；
计算信号能量值大于预设能量门限的检测带宽与非授权载波带宽的比例，得到带宽比例值，所述检测带宽的取值不大于LTE-U基站的非授权频段载波的使用带宽，并且所述检测带宽能够整除LTE-U基站的非授权频段载波的使用带宽；
根据所述信号能量值和带宽比例值，调整所述集合对应的时间段的时长。
在一种可能的设计中，网络侧设备对获取的信号能量值求和，得到信号能量总值；
若所述信号能量总值大于第一阈值，且所述带宽比例值大于第二阈值时，则所述集合禁用非授权频谱资源M个周期T，M取值为正整数；
若所述信号能量总值大于第一阈值，且所述带宽比例值不大于第二阈值时，则将所述集合对应的时间段调短；
若所述信号能量总值和所述带宽比例值均小于第三阈值，则将所述集合对应的时间段调长，其中，第三阈值小于所述第一阈值，且调整后的所述集合对应的时间段的长度小于周期T。
第二方面，基于同样的发明构思，本发明实施例进一步地提供一种非授权频谱资源分配装置，该装置包括：
划分单元，用以将LTE-U网络中的LTE-U基站划分为N个集合，其中，同一集合的LTE-U基站网络覆盖区域连续，N为正整数；
分配单元，用以确定各个集合在同一周期T内占用非授权频谱资源的不 同的时间段，以使各个集合内的LTE-U基站在对应的时间段为接入的UE分配非授权频谱资源，其中，每个集合的时间段均小于所述周期T，N个集合的时间段的并集等于所述周期T。
进一步地，所述装置还包括：针对所述N个集合中的任意一个集合，所述集合网络覆盖区域内的UE被配置之后的DRX激活期与所述集合对应的时间段一致。
在一种可能的设计中，所述分配单元具体用于：
对N个集合从零开始进行编号，得到每个集合的集合标识，按照公式一计算在周期T内每个集合开始占用非授权频谱资源的初始时间。
进一步地，所述装置还包括还包括：
获取单元，用于针对每个集合，获取每个集合的LTE-U基站在指定时间段内检测到的非授权频段频谱内的信号能量值，所述指定时间段是指每个周期T中除了所述集合占用非授权频谱资源对应的时间段之外的时间；
计算单元，用于计算信号能量值大于预设能量门限的检测带宽与非授权载波带宽的比例，得到带宽比例值，所述检测带宽的取值不大于LTE-U基站的非授权频段载波的使用带宽，并且所述检测带宽能够整除LTE-U基站的非授权频段载波的使用带宽；
调整单元，用于根据所述信号能量值和带宽比例值，调整所述集合对应的时间段的时长。
在一种可能的设计中，所述调整单元具体用于：
对所述获取单元获取的信号能量值求和，得到信号能量总值；
若所述信号能量总值大于第一阈值，且所述带宽比例值大于第二阈值时，则所述集合禁用非授权频谱资源M个周期T，M取值为正整数；
若所述信号能量总值大于第一阈值，且所述带宽比例值不大于第二阈值时，则将所述集合对应的时间段调短；
若所述信号能量总值和所述带宽比例值均小于第三阈值，则将所述集合对应的时间段调长，其中，第三阈值小于所述第一阈值，且调整后的所述集 合对应的时间段的长度小于周期T。
第三方面，本申请实施例提供一种网元，该网元可以是上文中的网络侧设备，包括：通信接口、处理器、总线、以及存储器，其中，所述处理器调用存储在所述存储器中的指令，执行以下处理：
将LTE-U网络中的LTE-U基站划分为N个集合，其中，同一集合的LTE-U基站网络覆盖区域连续，N为正整数；
确定各个集合在同一周期T内占用非授权频谱资源的不同的时间段，以使各个集合内的LTE-U基站在对应的时间段为接入的UE分配非授权频谱资源，其中，每个集合的时间段均小于所述周期T，N个集合的时间段的并集等于所述周期T。
进一步地，针对所述N个集合中的任意一个集合，所述集合网络覆盖区域内的UE被配置之后的DRX激活期与所述集合对应的时间段一致。
在一种可能的设计中，所述处理器具体用于：对N个集合从零开始进行编号，得到每个集合的集合标识，按照公式一计算在周期T内每个集合开始占用非授权频谱资源的初始时间。
进一步地，在一种可能的设计中，所述处理器还用于：
针对每个集合，获取每个集合的LTE-U基站在指定时间段内检测到的非授权频段频谱内的信号能量值，所述指定时间段是指每个周期T中除了所述集合占用非授权频谱资源对应的时间段之外的时间；
计算信号能量值大于预设能量门限的检测带宽与非授权载波带宽的比例，得到带宽比例值，所述检测带宽的取值不大于LTE-U基站的非授权频段载波的使用带宽，并且所述检测带宽能够整除LTE-U基站的非授权频段载波的使用带宽；
根据所述信号能量值和带宽比例值，调整所述集合对应的时间段的时长。
在一种可能的设计中，所述处理器具体用于：对获取的信号能量值求和，得到信号能量总值；若所述信号能量总值大于第一阈值，且所述带宽比例值大于第二阈值时，则所述集合禁用非授权频谱资源M个周期T，M取值为正 整数；
若所述信号能量总值大于第一阈值，且所述带宽比例值不大于第二阈值时，则将所述集合对应的时间段调短；
若所述信号能量总值和所述带宽比例值均小于第三阈值，则将所述集合对应的时间段调长，其中，第三阈值小于所述第一阈值，且调整后的所述集合对应的时间段的长度小于周期T。
第四方面，本发明实施例提供一种非暂态计算机可读存储介质，所述非暂态计算机可读存储介质存储计算机指令，所述计算机指令用于使所述计算机执行上述任一项所述的非授权频谱资源分配方法。
第五方面，本发明实施例提供一种计算机程序产品，所述计算机程序产品包括存储在非暂态计算机可读存储介质上的计算程序，所述计算机程序包括程序指令，当所述程序指令被计算机执行时，使所述计算机执行上述任一项所述的非授权频谱资源分配方法。
本发明实施例中网络侧配置不同区域的LTE-U基站交替占用非授权频谱资源，即网络侧预先将LTE-U网络中的LTE-U基站划分为若干个集合，然后配置不同的集合分别在每个周期的不同的时间段占用非授权频谱资源，也就是说将时域资源进行划分，使得LTE-U网络中的不同LTE-U基站周期性地可以在不同时间段占有非授权频谱资源，这样，当LTE-U基站占用非授权频谱资源时，接入LTE-U系统的LTE终端可以接入非授权频段进行通信，当LTE-U基站不占用非授权频谱资源时，接入附近的Wi-Fi基站的Wi-Fi终端就可以接入非授权频段进行通信，从而实现LTE-U与Wi-Fi的友好共存，同时因为始终都有LTE-U基站在占用非授权频谱资源，实现LTE-U在非授权频段内提供连续的服务，达到了提高LTE-U系统容量的目的。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简要介绍，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，对于本领域的普通技术人员来讲，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为现有技术中的一种LTE-U系统和Wi-Fi系统共存的场景示意图；
图2为本发明实施例提供的一种非授权频谱资源分配方法的流程示意图；
图3为本发明实施例提供的一种划分网络覆盖区域内的LTE-U基站的示意图；
图4为本发明实施例提供的一种周期性地为不同集合划分时间片段的示意图；
图5为本发明实施例提供的一种非授权频谱资源分配装置架构示意图；
图6为本发明实施例提供一种网元架构示意图。
具体实施方式
为了使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本发明作进一步地详细描述，显然，所描述的实施例仅仅是本发明一部份实施例，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做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
为了使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本发明作进一步地详细描述，显然，所描述的实施例仅仅是本发明一部份实施例，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做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
本文中结合终端和/或基站来描述各种方面。终端，指向用户提供语音和/ 或数据连通性的设备(device)，包括无线终端或有线终端。无线终端可以是具有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备，经无线接入网与一个或多个核心网进行通信的移动终端。例如，无线终端可以是移动电话(或称为“蜂窝”电话)和具有移动终端的计算机。又如，无线终端也可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置。再如，无线终端可以为移动站(英文为：Mobile Station)、接入点(英文为：Access Point)、或用户设备(英文为：User Equipment，简称UE)的一部分。
图1示出了现有技术中同一区域中LTE-U系统和Wi-Fi系统共存的情形，其中，在LTE基站100部署环境中有以LTE终端201为代表的LTE用户。LTE基站100覆盖范围内有Wi-Fi基站101和对应的Wi-Fi终端202，以及Wi-Fi基站102和对应的Wi-Fi终端203。其中Wi-Fi基站101对LTE基站100干扰强，Wi-Fi基站102对LTE基站100干扰弱，即意味着基站端能够通过频谱能量检测等简单技术发现Wi-Fi基站101，但是无法通过频谱能量检测等简单技术发现Wi-Fi基站102。此外Wi-Fi基站101和102都能对LTE终端201产生强干扰；LTE基站100对LTE系统服务范围内所有非LTE系统的接收和发送设备都会产生强干扰。
当不采用本发明实施例提供的LTE-U系统与Wi-Fi系统公平共存的方法时，LTE和Wi-Fi系统工作情况如下：
情形1、当LTE系统不工作时，各Wi-Fi系统按照802.11的规定采用CSMA/CA(Carrier Sense Multiple Access with Collision Detection，载波侦听多路访问/冲突避免)机制共享信道的时频资源；
情形2、当LTE系统进行工作时，LTE基站完成控制信令的传输后，无条件占用全部可用的时频资源进行数据传输；由于LTE基站对LTE系统服务范围内该频段上的系统均有强干扰，各Wi-Fi系统基于CSMA/CA机制，进行无限退避，直到LTE系统不工作，转入情形1。
基于LTE-U系统与Wi-Fi系统的工作原理，本发明实施例提供一种非授权频谱资源分配方法，该方法由网络侧设备执行，主要是由网络侧配置不同 LTE-U基站占用非授权频谱资源的时间，从而达到LTE-U基站与Wi-Fi基站公平占用非授权频段信道资源进行数据传输的目的。具体地，参见图2所示，该实现方法包括：
步骤S101，将LTE-U网络中的LTE-U基站划分为N个集合，其中，同一集合的LTE-U基站网络覆盖区域连续，N为正整数。
步骤S102，确定各个集合在同一周期T内占用非授权频谱资源的不同的时间段，以使各个集合内的LTE-U基站在对应的时间段为接入的UE分配非授权频谱资源，其中，每个集合的时间段均小于所述周期T，N个集合的时间段的并集等于所述周期T。
在执行步骤S101时，通常按照LTE-U基站空间位置关系，将LTE-U基站依次从0开始编号，相邻近的LTE-U基站的编号是连续的，然后将编号之后的LTE-U基站分组，其中，属于同一分组的LTE-U基站覆盖区域连续，不同分组的LTE-U基站覆盖区域不同。假设如图3所示，将设定区域内的LTE-U基站划分为如图3所示的三个集合，每个集合包含位置临近的多个LTE-U基站，这样，网络侧设备就可以周期性地在将非授权频谱资源划分给不同的时间段对应的集合，比如说，一个周期T被划分为3个时间段T1、T2、T3，其中在时间段T1，集合1内的LTE-U基站可以使用非授权频谱资源，在时间段T2，集合2内的LTE-U基站可以使用非授权频谱资源，在时间段T3，集合3内的LTE-U基站可以使用非授权频谱资源，可见，集合1内的LTE-U基站只会在时间段T1内占用LTE-U非授权频谱资源，在T1时间段内，LTE基站完成控制信令的传输后，无条件占用全部可用的时频资源进行数据传输；由于LTE-U基站对LTE系统服务范围内该频段上的系统均有强干扰，各Wi-Fi系统基于CSMA/CA机制，进行无限退避，直到LTE系统不工作，在T1时间段之外，集合1中的各Wi-Fi基站就可以按照802.11的规定采用CSMA/CA机 制共享信道的时频资源。
其中，所述确定各个集合在同一周期T内占用非授权频谱资源的不同的时间段，包括：
对N个集合从零开始进行编号，得到每个集合的集合标识，按照公式一计算在周期T内每个集合开始占用非授权频谱资源的初始时间；
T on_i＝floor(T/N)×i………………………公式[1]
其中，floor代表向下取整，N为集合总数，i为编号，T为时间周期，T on_i为集合标识为i的集合占用非授权频谱资源的初始时间。
因此，根据每个集合开始占用非授权频谱资源的初始时间和预设的每个集合占用非授权频段频谱资源的时间长度，确定每个集合在同一周期T内占用非授权频谱资源的不同的时间段。
如图4所示，每个集合的LTE-U基站的非授权频谱资源占用持续时间，记为T on；集合1中的LTE-U基站从T on_1开始占用非授权频谱资源，占用了T on之后停止占用，然后，集合2中的LTE-U基站从T on_2开始占用非授权频谱资源，占用了T on之后停止占用，直至集合n中的LTE-U基站从T on_n开始占用非授权频谱资源，占用了T on之后停止占用。所述基站的非授权频段载波占用持续时间T on，取值不大于周期T。从图4可见，属于同一集合的LTE-U基站，其非授权频段载波开启的开始时间相同，不同集合的非授权频谱资源开始占用资源的初始时间不同，在周期T内的任意时刻总有LTE-U基站占用非授权频谱资源。使得在周期T内，在任意时刻，总有基站的非授权频段载波开启，LTE系统资源可以一直得以充分利用，同时其中当部分集合不占用非授权频谱资源时，该集合周围的Wi-Fi基站就可以占用非授权频谱资源，实现LTE-U与Wi-Fi系统之间共享信道的公平使用，同时，保证LTE-U网络在非授权频 段能一直持续提供服务。
虽然目前现有技术中也存在交替地配置非授权频谱资源给LTE-U系统，但是现有技术主要是，全网采用相同的开启/关闭时间，即设定区域内的所有LTE-U基站在设定时间段内全部占用非授权频谱资源，占用了该设定时间段之后，又在后续的设定时间段内全部停止占用非授权频谱资源。在LTE-U系统停止占用非授权频谱资源时，LTE-U系统在非授权频段提供的服务中断，势必会给接入非授权频段载波的LTE终端产生影响，严重时甚至会导致LTE终端掉话，降低了用户体验，网络的整体性能也受到影响。若各基站自行进行确定及调整非授权频谱资源占用时间，考虑到影响某一Wi-Fi基站的LTE-U基站可能存在多个，若这些基站的非授权频段载波占用时间不一致，会严重影响Wi-Fi系统的传输。而本发明实施例通过将设定区域内的LTE-U基站划分为不同的集合，分区域地占用非授权频谱资源，就可以保证影响某一Wi-Fi基站的LTE-U基站只在同一时间段会占用非授权频谱资源，在该时间段之外就不会再占用，所以Wi-Fi基站就可以在该时间段之外接入非授权频谱资源。这样，就可以保证LTE-U在非授权频段内提供连续的服务，且能满足LTE-U与Wi-Fi双方的数据传输时间需求。
进一步地，针对所述N个集合中的任意一个集合，所述集合网络覆盖区域内的UE被配置之后的DRX(Discontinuous Reception，非连续接收)激活期与所述集合对应的时间段一致。
基于包的数据流通常是突发性的，在一段时间内有数据传输，但在接下来的一段较长时间内没有数据传输。在没有数据传输的时候，可以通过停止接收PDCCH(Physical Downlink Control Channel，物理下行控制信道)(此时会停止PDCCH盲检)来降低功耗，从而提升电池使用时间。这就是DRX的由来。DRX的基本机制是为处于RRC_CONNECTED态的UE配置一个DRX周期。DRX周期由“On Duration(激活期)”和“Opportunity for DRX(休眠期)”组成：在“On Duration”时间内，UE监听并接收PDCCH；在“Opportunity  for DRX”时间内，UE不接收PDCCH以减少功耗。考虑到终端在数据接收具有上述特点，因此集合网络覆盖区域内的UE被配置之后的DRX激活期与所述集合对应的时间段一致，即在T1时间段，集合1内的LTE终端的DRX激活期也是T1时间段，这样就可以保证LTE-U系统下数据的传输，进一步提高频谱资源的利用率。
进一步地，上述步骤中每个集合占用非授权频段频谱资源的时间长度可以自适应地进行调整，调整方法为：针对每个集合，获取每个集合的LTE-U基站在指定时间段内检测到的非授权频段频谱内的信号能量值，所述指定时间段是指每个周期T中除了所述集合占用非授权频谱资源对应的时间段之外的时间；
计算信号能量值大于预设能量门限的检测带宽与非授权载波带宽的比例，得到带宽比例值，所述检测带宽的取值不大于LTE-U基站的非授权频段载波的使用带宽，并且所述检测带宽能够整除LTE-U基站的非授权频段载波的使用带宽；
根据所述信号能量值和带宽比例值，调整所述集合对应的时间段的时长。
也就是说，针对任意一个集合，例如集合1，统计集合1内的LTE-U基站在T1时间段之外周期T的剩余时间段内的非授权频段频谱内的信号能量值，并且，在该剩余时间段内还检测非授权频谱资源内的信号能量。对于信号能量的检测，以检测带宽为单位进行检测，获取至少一个信号能量值。所述检测带宽，取值不大于基站的非授权频段载波的使用带宽，并可整除非授权频段载波的使用带宽。
其中，检测非授权频谱资源内的信号能量进行处理，具体地对获取的信号能量值求和，得到信号能量总值；
若所述信号能量总值大于第一阈值，且所述带宽比例值大于第二阈值时，则所述集合禁用非授权频谱资源M个周期T，M取值为正整数；
若所述信号能量总值大于第一阈值，且所述带宽比例值不大于第二阈值时，则将所述集合对应的时间段调短；
若所述信号能量总值和所述带宽比例值均小于第三阈值，则将所述集合对应的时间段调长，其中，第三阈值小于所述第一阈值，且调整后的所述集合对应的时间段的长度小于周期T。
也就是说对获取的至少一个信号能量值求和，得到基站非授权频段载波带宽内的信号能量值；同时，统计获取的至少一个信号能量值中大于预设信号强度门限的检测带宽范围，计算统计得到的检测带宽范围占基站非授权频段载波的配置带宽的比例，得到信号强度较大的带宽比例。
其中，网络侧设备预设调整周期，调整周期到期时，调整每个集合占用非授权频点载波的持续时间T on，其中，调整周期，取值不小于N个周期T的时间，N为正整数。当获得了信号能量总值和检测带宽之后，判断若所述信号能量总值大于第一阈值，且所述带宽比例值大于第二阈值时，说明该集合周围接入Wi-Fi基站的UE较多，Wi-Fi系统正在占用非授权频谱资源进行数据传输，所以可以暂时调整后续一段时间该集合不再占用非授权频谱资源。若所述信号能量总值大于第一阈值，且所述带宽比例值不大于第二阈值时，说明该集合周围有部分接入Wi-Fi基站的UE正在进行数据传输，因此适当地以减小步长ΔT down减小T on，反之，则就可以适当地以增加ΔT up步长增加T on，调整后的T on不能超过周期T的时间设置。LTE-U基站根据非授权频段带宽内的信号能量检测处理结果调整非授权频段载波开启的持续时间，从而能自适应调整非授权频段载波的开启/关闭状态，达到在非授权频段范围内，LTE-U基站与Wi-Fi分时占用共享信道进行数据传输的目的，且能权衡满足双方的数据传输时间需求，实现信道的公平分配。
基于相同的技术构思，本发明实施例还提供一种非授权频谱资源分配装置，该装置可执行上述方法实施例。本发明实施例提供的装置如图4所示，包括：划分单元401、分配单元402，其中：
划分单元401，用以将LTE-U网络中的LTE-U基站划分为N个集合，其中，同一集合的LTE-U基站网络覆盖区域连续，N为正整数；
分配单元402，用以确定各个集合在同一周期T内占用非授权频谱资源的不同的时间段，以使各个集合内的LTE-U基站在对应的时间段为接入的UE分配非授权频谱资源，其中，每个集合的时间段均小于所述周期T，N个集合的时间段的并集等于所述周期T。
其中，针对所述N个集合中的任意一个集合，所述集合网络覆盖区域内的UE被配置之后的DRX激活期与所述集合对应的时间段一致。
进一步地，所述分配单元402具体用于：对N个集合从零开始进行编号，得到每个集合的集合标识，按照公式一计算在周期T内每个集合开始占用非授权频谱资源的初始时间；
所述公式一为：
T on_i＝floor(T/N)×i
其中，floor代表向下取整，N为集合总数，i为编号，T为时间周期，T on_i为集合标识为i的集合占用非授权频谱资源的初始时间；
根据每个集合开始占用非授权频谱资源的初始时间和预设的每个集合占用非授权频段频谱资源的时间长度，确定每个集合在同一周期T内占用非授权频谱资源的不同的时间段。
进一步地，所述装置，还包括：获取单元403，用于针对每个集合，获取每个集合的LTE-U基站在指定时间段内检测到的非授权频段频谱内的信号能量值，所述指定时间段是指每个周期T中除了所述集合占用非授权频谱资源对应的时间段之外的时间；
计算单元404，用于计算信号能量值大于预设能量门限的检测带宽与非授权载波带宽的比例，得到带宽比例值，所述检测带宽的取值不大于LTE-U基站的非授权频段载波的使用带宽，并且所述检测带宽能够整除LTE-U基站的非授权频段载波的使用带宽；
调整单元405，用于根据所述信号能量值和带宽比例值，调整所述集合对应的时间段的时长。
进一步地，所述调整单元405具体用于：对所述获取单元获取的信号能量值求和，得到信号能量总值；
若所述信号能量总值大于第一阈值，且所述带宽比例值大于第二阈值时，则所述集合禁用非授权频谱资源M个周期T，M取值为正整数；
若所述信号能量总值大于第一阈值，且所述带宽比例值不大于第二阈值时，则将所述集合对应的时间段调短；
若所述信号能量总值和所述带宽比例值均小于第三阈值，则将所述集合对应的时间段调长，其中，第三阈值小于所述第一阈值，且调整后的所述集合对应的时间段的长度小于周期T。
综上所述，本发明实施例中网络侧配置不同区域的LTE-U基站交替占用非授权频谱资源，即网络侧预先将LTE-U网络中的LTE-U基站划分为若干个集合，然后配置不同的集合分别在每个周期的不同的时间段占用非授权频谱资源，也就是说将时域资源进行划分，使得LTE-U网络中的不同LTE-U基站周期性地可以在不同时间段占有非授权频谱资源，这样，当LTE-U基站占用非授权频谱资源时，接入LTE-U系统的UE可以接入非授权频段进行通信，当LTE-U基站不占用非授权频谱资源时，接入附近的Wi-Fi基站的UE就可以接入非授权频段进行通信，从而实现LTE-U与Wi-Fi的友好共存，同时因为始终都有LTE-U基站在占用非授权频谱资源，实现LTE-U在非授权频段内提供连续的服务，达到了提高LTE-U系统容量的目的。
基于相同的技术构思，本申请实施例提供一种网元，该网元可以是上文中的网络侧设备。图6为本发明提供的网元的结构示意图，该网元500包括：包括：通信接口501、处理器502、存储器503和总线系统504。
其中，存储器503，用于存放计算机程序，还可以存储网元接收的一些数据信息等。具体地，计算机程序可以包括程序代码，程序代码可以包括计算机操作指令等。存储器503可能为随机存取存储器(英文：random-access memory，RAM)，也可能为非易失性存储器(英文：non-volatile memory，NVM)，例如至少一个磁盘存储器。图中仅示出了一个存储器，当然，存储器也可以 根据需要，设置为多个。存储器503也可以是处理器502中的存储器。
一种示例说明，存储器503可以存储如下的元素、可执行模块或者数据结构等，或者是它们的子集，或者它们的扩展集：
操作指令：包括各种操作指令，用于实现各种操作。
操作系统：包括各种系统程序，用于实现各种基础业务以及处理基于硬件的任务。
处理器502用于网元500的操作，处理器802还可以称为中央处理单元(central processing unit，CPU)。
通信接口501，用于与网元500连接的其他设备进行信息收发等处理。
具体的应用中，网元500的各个组件可以通过总线系统504耦合在一起，其中总线系统504除包括数据总线之外，还可以包括电源总线、控制总线和状态信号总线等。但是为了清楚说明起见，在图中将各种总线都标为总线系统504。为便于表示，图6中仅是示意性画出。
上述本申请实施例揭示的方法可以应用于处理器502中，或者由处理器502实现。处理器502可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法的各步骤可以通过处理器502中的硬件集成逻辑电路或者软件形式的指令完成。上述的处理器502可以是通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质可以位于存储器503中，处理器502可以读取存储器503中存储的信息，结合硬件执行以上方法步骤。
本实施例中提供的处理器可以将LTE-U网络中的LTE-U基站划分为N个 集合，然后确定各个集合在同一周期T内占用非授权频谱资源的不同的时间段，以使各个集合内的LTE-U基站在对应的时间段为接入的UE分配非授权频谱资源，其中，每个集合的时间段均小于所述周期T，N个集合的时间段的并集等于所述周期T。具体实现可以参照上述方法实施例中的具体描述，这里不再详细赘述。
综上，本申请实施例中的网元预先将LTE-U网络中的LTE-U基站划分为若干个集合，然后配置不同的集合分别在每个周期的不同的时间段占用非授权频谱资源，也就是说将时域资源进行划分，使得LTE-U网络中的不同LTE-U基站周期性地可以在不同时间段占有非授权频谱资源，这样，当LTE-U基站占用非授权频谱资源时，接入LTE-U系统的LTE终端可以接入非授权频段进行通信，当LTE-U基站不占用非授权频谱资源时，接入附近的Wi-Fi基站的Wi-Fi终端就可以接入非授权频段进行通信，从而实现LTE-U与Wi-Fi的友好共存。
另外，本发明还提供一种非暂态计算机可读存储介质，所述非暂态计算机可读存储介质存储计算机指令，所述计算机指令用于使所述计算机执行上述任一项所述的非授权频谱资源分配方法。
另外，本发明还提供一种计算机程序产品，所述计算机程序产品包括存储在非暂态计算机可读存储介质上的计算程序，所述计算机程序包括程序指令，当所述程序指令被计算机执行时，使所述计算机执行上述任一项所述的非授权频谱资源分配方法。
尽管已描述了本发明的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (17)

  1. 一种非授权频谱资源分配方法，其特征在于，该方法包括：
    将LTE-U网络中的LTE-U基站划分为N个集合，其中，同一集合的LTE-U基站网络覆盖区域连续，N为正整数；
    确定各个集合在同一周期T内占用非授权频谱资源的不同的时间段，以使各个集合内的LTE-U基站在对应的时间段为接入的UE分配非授权频谱资源，其中，每个集合的时间段均小于所述周期T，N个集合的时间段的并集等于所述周期T。
  2. 如权利要求1所述的非授权频谱资源分配方法，其特征在于，还包括：
    针对所述N个集合中的任意一个集合，所述集合网络覆盖区域内的UE被配置之后的DRX激活期与所述集合对应的时间段一致。
  3. 如权利要求1所述的非授权频谱资源分配方法，其特征在于，所述确定各个集合在同一周期T内占用非授权频谱资源的不同的时间段，包括：
    对N个集合从零开始进行编号，得到每个集合的集合标识，按照公式一计算在周期T内每个集合开始占用非授权频谱资源的初始时间；
    所述公式一为：
    T on_i＝floor(T/N)×i
    其中，floor代表向下取整，N为集合总数，i为编号，T为时间周期，T on_i为集合标识为i的集合占用非授权频谱资源的初始时间；
    根据每个集合开始占用非授权频谱资源的初始时间和预设的每个集合占用非授权频段频谱资源的时间长度，确定每个集合在同一周期T内占用非授权频谱资源的不同的时间段。
  4. 如权利要求3所述的非授权频谱资源分配方法，其特征在于，还包括：
    针对每个集合，获取每个集合的LTE-U基站在指定时间段内检测到的非授权频段频谱内的信号能量值，所述指定时间段是指每个周期T中除了所述集合占用非授权频谱资源对应的时间段之外的时间；
    计算信号能量值大于预设能量门限的检测带宽与非授权载波带宽的比例，得到带宽比例值，所述检测带宽的取值不大于LTE-U基站的非授权频段载波的使用带宽，并且所述检测带宽能够整除LTE-U基站的非授权频段载波的使用带宽；
    根据所述信号能量值和带宽比例值，调整所述集合对应的时间段的时长。
  5. 如权利要求4所述的非授权频谱资源分配方法，其特征在于，所述根据所述信号能量值和带宽比例值，调整所述集合对应的时间段的时长，包括：
    对获取的信号能量值求和，得到信号能量总值；
    若所述信号能量总值大于第一阈值，且所述带宽比例值大于第二阈值时，则所述集合禁用非授权频谱资源M个周期T，M取值为正整数；
    若所述信号能量总值大于第一阈值，且所述带宽比例值不大于第二阈值时，则将所述集合对应的时间段调短；
    若所述信号能量总值和所述带宽比例值均小于第三阈值，则将所述集合对应的时间段调长，其中，第三阈值小于所述第一阈值，且调整后的所述集合对应的时间段的长度小于周期T。
  6. 一种非授权频谱资源分配装置，其特征在于，该装置包括：
    划分单元，用以将LTE-U网络中的LTE-U基站划分为N个集合，其中，同一集合的LTE-U基站网络覆盖区域连续，N为正整数；
    分配单元，用以确定各个集合在同一周期T内占用非授权频谱资源的不同的时间段，以使各个集合内的LTE-U基站在对应的时间段为接入的UE分配非授权频谱资源，其中，每个集合的时间段均小于所述周期T，N个集合的时间段的并集等于所述周期T。
  7. 如权利要求6所述的非授权频谱资源分配装置，其特征在于，还包括：
    针对所述N个集合中的任意一个集合，所述集合网络覆盖区域内的UE被配置之后的DRX激活期与所述集合对应的时间段一致。
  8. 如权利要求6所述的非授权频谱资源分配装置，其特征在于，所述分配单元具体用于：
    对N个集合从零开始进行编号，得到每个集合的集合标识，按照公式一计算在周期T内每个集合开始占用非授权频谱资源的初始时间；
    所述公式一为：
    T on_i＝floor(T/N)×i
    其中，floor代表向下取整，N为集合总数，i为编号，T为时间周期，T on_i为集合标识为i的集合占用非授权频谱资源的初始时间；
    根据每个集合开始占用非授权频谱资源的初始时间和预设的每个集合占用非授权频段频谱资源的时间长度，确定每个集合在同一周期T内占用非授权频谱资源的不同的时间段。
  9. 如权利要求8所述的非授权频谱资源分配装置，其特征在于，还包括：
    获取单元，用于针对每个集合，获取每个集合的LTE-U基站在指定时间段内检测到的非授权频段频谱内的信号能量值，所述指定时间段是指每个周期T中除了所述集合占用非授权频谱资源对应的时间段之外的时间；
    计算单元，用于计算信号能量值大于预设能量门限的检测带宽与非授权载波带宽的比例，得到带宽比例值，所述检测带宽的取值不大于LTE-U基站的非授权频段载波的使用带宽，并且所述检测带宽能够整除LTE-U基站的非授权频段载波的使用带宽；
    调整单元，用于根据所述信号能量值和带宽比例值，调整所述集合对应的时间段的时长。
  10. 如权利要求9所述的非授权频谱资源分配装置，其特征在于，所述调整单元具体用于：
    对所述获取单元获取的信号能量值求和，得到信号能量总值；
    若所述信号能量总值大于第一阈值，且所述带宽比例值大于第二阈值时，则所述集合禁用非授权频谱资源M个周期T，M取值为正整数；
    若所述信号能量总值大于第一阈值，且所述带宽比例值不大于第二阈值时，则将所述集合对应的时间段调短；
    若所述信号能量总值和所述带宽比例值均小于第三阈值，则将所述集合对应的时间段调长，其中，第三阈值小于所述第一阈值，且调整后的所述集合对应的时间段的长度小于周期T。
  11. 一种网元，其特征在于，包括：通信接口、处理器以及存储器；
    所述处理器调用存储在所述存储器中的指令，执行以下处理：
    将LTE-U网络中的LTE-U基站划分为N个集合，其中，同一集合的LTE-U基站网络覆盖区域连续，N为正整数；
    确定各个集合在同一周期T内占用非授权频谱资源的不同的时间段，以使各个集合内的LTE-U基站在对应的时间段为接入的UE分配非授权频谱资源，其中，每个集合的时间段均小于所述周期T，N个集合的时间段的并集等于所述周期T。
  12. 如权利要求11所述的网元，其特征在于，
    针对所述N个集合中的任意一个集合，所述集合网络覆盖区域内的UE被配置之后的DRX激活期与所述集合对应的时间段一致。
  13. 如权利要求11所述的网元，其特征在于，所述处理器具体用于：
    对N个集合从零开始进行编号，得到每个集合的集合标识，按照公式一计算在周期T内每个集合开始占用非授权频谱资源的初始时间；
    所述公式一为：
    T on_i＝floor(T/N)×i
    其中，floor代表向下取整，N为集合总数，i为编号，T为时间周期，T on_i为集合标识为i的集合占用非授权频谱资源的初始时间；
    根据每个集合开始占用非授权频谱资源的初始时间和预设的每个集合占用非授权频段频谱资源的时间长度，确定每个集合在同一周期T内占用非授权频谱资源的不同的时间段。
  14. 如权利要求13所述的网元，其特征在于，所述处理器还用于：
    针对每个集合，获取每个集合的LTE-U基站在指定时间段内检测到的非 授权频段频谱内的信号能量值，所述指定时间段是指每个周期T中除了所述集合占用非授权频谱资源对应的时间段之外的时间；
    计算信号能量值大于预设能量门限的检测带宽与非授权载波带宽的比例，得到带宽比例值，所述检测带宽的取值不大于LTE-U基站的非授权频段载波的使用带宽，并且所述检测带宽能够整除LTE-U基站的非授权频段载波的使用带宽；
    根据所述信号能量值和带宽比例值，调整所述集合对应的时间段的时长。
  15. 如权利要求14所述的网元，其特征在于，所述处理器具体用于：
    对获取的信号能量值求和，得到信号能量总值；
    若所述信号能量总值大于第一阈值，且所述带宽比例值大于第二阈值时，则所述集合禁用非授权频谱资源M个周期T，M取值为正整数；
    若所述信号能量总值大于第一阈值，且所述带宽比例值不大于第二阈值时，则将所述集合对应的时间段调短；
    若所述信号能量总值和所述带宽比例值均小于第三阈值，则将所述集合对应的时间段调长，其中，第三阈值小于所述第一阈值，且调整后的所述集合对应的时间段的长度小于周期T。
  16. 一种计算机存储介质，其特征在于，所述计算机存储介质存储有计算机可执行指令，所述计算机可执行指令用于使计算机执行如权利要求1至5任一项所述的方法。
  17. 一种计算机程序产品，其特征在于，当所述计算机程序产品被计算机执行时，使所述计算机执如行权利要求1至5任一项所述的方法。
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CN106851662A (zh) * 2017-01-18 2017-06-13 京信通信技术(广州)有限公司 一种非授权频谱资源分配方法及装置

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CN110786035A (zh) * 2019-09-26 2020-02-11 小米通讯技术有限公司 控制资源集合的处理方法、装置及计算机存储介质
CN110786035B (zh) * 2019-09-26 2024-04-26 小米通讯技术有限公司 控制资源集合的处理方法、装置及计算机存储介质
CN114928549A (zh) * 2022-04-20 2022-08-19 清华大学 基于强化学习的非授权频段的通信资源分配方法及装置
CN116707557A (zh) * 2022-12-20 2023-09-05 荣耀终端有限公司 信道选择方法、接收机及存储介质
CN116707557B (zh) * 2022-12-20 2024-05-03 荣耀终端有限公司 信道选择方法、接收机及存储介质

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