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WO2013020483A1 - Procédé et dispositif pour une utilisation dans un transfert intercellulaire de canal - Google Patents

Procédé et dispositif pour une utilisation dans un transfert intercellulaire de canal Download PDF

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Publication number
WO2013020483A1
WO2013020483A1 PCT/CN2012/079645 CN2012079645W WO2013020483A1 WO 2013020483 A1 WO2013020483 A1 WO 2013020483A1 CN 2012079645 W CN2012079645 W CN 2012079645W WO 2013020483 A1 WO2013020483 A1 WO 2013020483A1
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WO
WIPO (PCT)
Prior art keywords
working
channel
subchannel
network side
channel switching
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2012/079645
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English (en)
Chinese (zh)
Inventor
鲍东山
姚惠娟
阎德升
解晓强
周玉宝
任旻
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Nufront Wireless Tech Co Ltd
Original Assignee
Beijing Nufront Wireless Tech Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201110224711.3A external-priority patent/CN102917428B/zh
Application filed by Beijing Nufront Wireless Tech Co Ltd filed Critical Beijing Nufront Wireless Tech Co Ltd
Priority to CN201280013188.2A priority Critical patent/CN103609165B/zh
Publication of WO2013020483A1 publication Critical patent/WO2013020483A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0072—Transmission or use of information for re-establishing the radio link of resource information of target access point

Definitions

  • the present invention belongs to the field of communications technologies, and in particular, to a method and apparatus for channel switching.
  • wireless communication systems applied to short and medium communication distances include wireless LAN technology based on the 802.11 standard, WiFi, 802.15-based Bluetooth system, and Femto technology for indoor applications generated by mobile communication systems. and many more.
  • WiFi technology based on 802.1 1 is one of the most widely used wireless network transmission technologies. Since the WiFi system uses the Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) mechanism, the system efficiency is higher than that of the wireless resources.
  • CSMA/CA Carrier Sense Multiple Access with Collision Avoidance
  • the Femto technology based on the 3GPP standard is a new technology for indoor coverage that has evolved from a mobile communication system.
  • TDDD time division duplex
  • the static allocation of uplink and downlink resources and various types of data services with different needs, such as: browsing webpages, mobile video, mobile Games, machine-to-machine (M2M), etc., it is difficult to achieve dynamic adaptation of business requirements and resource partitioning.
  • An embodiment of the present invention provides a method for channel switching, where the method includes:
  • the working subchannel mapping indicates the presence or absence of a plurality of working subchannels, and the lowest working subchannel of the plurality of working subchannels is a lowest working subchannel corresponding to a network side occupied frequency band starting frequency;
  • the channel number indicates the channel number of the lowest working subchannel corresponding to the frequency band starting frequency of the network side.
  • the working subchannel mapping is implemented by using a bitmap bitmap, where each bit is an indication bit, and each indicator bit is used to indicate the presence or absence of a working subchannel.
  • the working subchannel indicated by the working subchannel mapping is a working subchannel to which the target terminal is to be handed over, and the channel switching notification is sent to the target terminal by unicast or broadcast.
  • the channel switching notification further carries one or more of the following items:
  • a channel switching counter indicating a set duration from a transmission channel switching notification to a switching to a working subchannel
  • the working subchannel indicates a working subchannel after the network side performs channel switching, and the channel switching notification broadcast is sent to all terminals.
  • the channel switching notification further carries a current working bandwidth of the network side and/or a spectrum aggregation mode between two or more working subchannels indicated by the working subchannel mapping.
  • the method further includes:
  • Channel switching decisions are made based on the channel quality.
  • the determining, by the network side, the channel quality of each working subchannel occupied by the network side is: receiving channel measurement results sent by each terminal;
  • the channel switching decision includes: for each channel measurement result received, if the channel measurement result reported by the terminal indicates that the channel quality of the working subchannel occupied by the terminal is lower than the first set threshold, the terminal is used as the target terminal, and The working subchannel to be switched to is selected for the target terminal from other working subchannels and/or new available subchannels whose channel quality occupied by the network side is higher than the first set threshold.
  • the determining, by the network side, the channel quality of each working subchannel occupied by the network side is: measuring channel quality on the network side;
  • the channel switching decision includes: using a terminal on a working subchannel whose channel quality is lower than a second set threshold as a target terminal, and other working subchannels occupying a channel quality from the network side higher than a second set threshold and/or Or the new available subchannel selects the working subchannel to be switched to for the target terminal.
  • the channel load and/or the service requirement of the target terminal are further combined.
  • the channel switching decision described above further includes: other working subchannels occupied from the network side and/or Or the new available subchannel selects the working subchannel to be switched to for the network side.
  • the foregoing channel switching decision may further include: determining a target working bandwidth of the network side.
  • An embodiment of the present invention further provides an apparatus for channel switching, where the apparatus includes:
  • a generating unit configured to generate a channel switching notification that carries a working subchannel mapping and a starting channel number
  • a sending unit configured to send the channel switching notification
  • the working subchannel mapping indicates the presence or absence of the plurality of working subchannels, wherein the lowest working subchannel is the lowest working subchannel corresponding to the network side occupied frequency band starting frequency; the starting channel number indicates the network side occupied frequency band. The channel number of the lowest working subchannel corresponding to the start frequency.
  • the working subchannel mapping is implemented by using a bitmap bitmap, where each bit is an indication bit, and each indicator bit is used to indicate the presence or absence of a working subchannel.
  • the working subchannel indicated by the working subchannel mapping is a working subchannel to which the target terminal is to be switched;
  • the transmitting unit sends a channel switching notification unicast or broadcast to the target terminal.
  • the generating unit further carries one or more of the following in the channel switching notification:
  • a channel switching counter indicating a set duration from a transmission channel switching notification to a switching to a working subchannel
  • the working subchannel indicates a working subchannel after the network side performs channel switching, and the channel switching notification broadcast is sent to all terminals.
  • the generating unit further carries, in the channel switching notification, a current working bandwidth of the network side and/or a spectrum aggregation mode between the two working subchannels indicated by the working subchannel mapping.
  • the device further includes:
  • a determining unit configured to determine channel quality of each working subchannel occupied by the network side
  • a handover decision unit configured to perform channel switching decision according to the channel quality
  • the determining unit receives the channel measurement result sent by each terminal, to determine channel quality of each working subchannel occupied by the network side;
  • the handover decision unit is configured to determine, according to the received channel measurement result, if the channel measurement result reported by the terminal indicates that the channel quality of the working subchannel occupied by the terminal is lower than the first set threshold, the terminal is used as the target terminal, and the network is obtained from the network.
  • the working subchannels to be switched to are selected for the target terminal in the other working subchannels and/or the new available subchannels in which the channel quality occupied by the side is higher than the first set threshold.
  • the determining unit further measures channel quality on the network side to determine channel quality of each working subchannel occupied by the network side;
  • the handover decision unit uses, as a target terminal, a terminal on a working subchannel whose channel quality is lower than a second set threshold, and other working objects that occupy a channel quality higher than a second set threshold from the network side A working subchannel to be switched to is selected for the target terminal in the channel and/or the new available subchannel.
  • the channel decision unit further combines the channel load and/or the service requirement of the target terminal when selecting the working subchannel to be switched to for the target terminal.
  • the handover decision unit further selects, from the other working subchannels occupied by the network side and/or the new available subchannels, the working subchannel to be switched to for the network side.
  • the above handover decision unit may also determine a target working bandwidth on the network side.
  • FIG. 1 is a flowchart of a method for channel switching in an embodiment of the present invention
  • EUHT enhanced ultra high wireless wireless local area network
  • FIG. 4 is a schematic structural diagram of a channel switching notification frame according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of another channel switching notification frame according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of a channel switching before and after application example 2 of the present invention
  • FIG. 7 is a schematic diagram of a channel before and after switching in application example 3 of the present invention.
  • FIG. 8 is a schematic diagram of a channel before and after switching in application example 4 of the present invention.
  • FIG. 9 is a schematic diagram of a channel before and after switching in application example 5 of the present invention.
  • FIG. 10 is a schematic diagram of a channel switching before and after application example 6 of the present invention.
  • FIG. 11 is a schematic structural diagram of an apparatus for channel switching according to an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of an apparatus for channel switching in Application Example 7 of the present invention. detailed description
  • the network side may occupy more than one working subchannel, and the terminal may reside on more than one of the working subchannels.
  • the method for channel switching in the embodiment of the present invention is It is proposed for such wireless communication systems.
  • FIG. 1 is a flowchart of a method for channel switching according to an embodiment of the present invention, where the process includes: Step 11: Generate a channel switching notification that carries a working subchannel mapping and a starting channel number.
  • the working subchannel mapping indicates the presence or absence of the plurality of working subchannels, and the lowest working subchannel of the plurality of working subchannels is the lowest working subchannel corresponding to the network side occupied frequency band starting frequency.
  • the starting channel number indicates the channel number of the lowest working subchannel corresponding to the starting frequency of the band occupied by the network side.
  • Step 12 Send the channel switching notification.
  • the method of the embodiment of the present invention may be used to indicate that the terminal performs channel switching.
  • the working subchannel mapping carried by the channel switching notification indicates that the working terminal is to be switched to the working subchannel, and the starting channel number indicates that the network side occupied frequency band starts frequency correspondingly.
  • the method of the embodiment of the present invention may further notify the terminal in the serving cell of the handover result after the network side switches its working subchannel, and the working subchannel mapping carried in the channel switching notification indicates that the network side performs channel switching.
  • Working subchannel, the starting channel number indicates the channel number of the lowest working subchannel corresponding to the starting frequency of the band occupied by the network side.
  • the working subchannel mapping may indicate the presence or absence of multiple working subchannels, and wherein the most working subchannels are the lowest working subchannels corresponding to the network side occupied frequency band starting frequency, and the starting channel number indicates the network side occupied frequency band.
  • the EUHT system supports central access points (CAP, Central Access Point) and stations (STA, Station) with different bandwidth capabilities for networking and communication.
  • CAP Central Access Point
  • STA Station
  • the EUHT system uses 20MHz as the basic bandwidth, and can support 40MHz and 80MHz through frequency aggregation. Spectrum continuous or non-continuous bandwidth.
  • Figure 2 is a schematic diagram of the networking of the EUHT system.
  • the multi-carrier mode supported by EUHT includes:
  • Each 20MHz subchannel is an independent channel, and 20MHz, 40MHz and 80MHz CAP and STA are independently transmitted on one or more 20MHz subchannels;
  • Aggregation Mode 2 Multiple consecutive 20MHz subchannel aggregations, 40MHz and 80MHz CAP and STAs can be continuously transmitted in the frequency domain on the aggregated channel.
  • an EUHT system In order to provide end users with high-speed and low-cost access services, an EUHT system is proposed. In order to achieve a high-rate service, a frequency-spreading mode that is more suitable for the frequency band of the Industrial Scientific Medical (ISM) is used. In the embodiment of the present invention, channel selection and switching are proposed in the multi-band aggregation mode. Management operations.
  • the CAP can be configured with different bandwidth capabilities of 20MHz, 40MHz or 80MHz, and allows STA access of different bandwidth capabilities of 20MHz, 40MHz or 80MHz.
  • the 20MHz STA can only select the aggregation mode 1, 40MHz and 80MHz.
  • the STA can select aggregation mode 1 or 2.
  • the CAP can also support multiple STA time division transmissions in different bandwidth modes in one downlink data transmission.
  • the CAP can occupy one subchannel of four subbands with a bandwidth of 20 MHz, or several consecutive or discontinuous subchannels, and the subchannel occupied by the CAP is the working subchannel of the CAP.
  • the execution body of the method step may be a CAP or an independent entity on the same side as the CAP. .
  • Application example one
  • FIG. 3 is a flowchart of a method for channel switching in application example 1 of the present invention, where the process includes: Step 31: The CAP determines channel quality of each working subchannel occupied.
  • the CAP can determine the channel quality of each working subchannel occupied by the CAP in two ways.
  • the CAP is determined by the channel measurement result reported by the STA.
  • the STA can initiate channel measurement in the following situations:
  • the CAP periodically sends a measurement request to the STA in the serving cell, and after receiving the measurement request, the STA starts to perform channel measurement, and reports the channel measurement result to the CAP.
  • the STA periodically performs channel measurement, and reports the channel measurement result to the CAP.
  • the STA performs channel measurement on the working subchannel in which the STA resides.
  • the STA may also choose to perform channel measurement on other working subchannels of the CAP. For example, if the STA with a working bandwidth of 40 MHz currently only resides on one working subchannel of the CAP, the STA may further measure the CAP. Another working subchannel.
  • the CAP performs channel measurement on the network side.
  • the CAP can periodically perform channel measurement on the network side, or can perform channel measurement by triggering a handover event such as link degradation.
  • Step 32 The CAP performs channel switching decision according to channel quality.
  • the CAP performs a channel switching decision for each measurement result received. If the channel measurement result reported by a STA indicates that the channel quality of the working subchannel occupied by the STA is lower than the first setting, Determining a threshold, using the STA as a target STA, and selecting, from the other working subchannels and/or new available subchannels in which the channel quality occupied by the CAP is higher than the first set threshold, the working to be switched to the target STA channel.
  • the CAP will work the subchannel with the channel quality lower than the second set threshold.
  • the upper STA is used as the target STA, and the working subchannel to be switched to is selected for the target STA from among other working subchannels and/or new available subchannels whose channel quality is higher than the second set threshold.
  • the CAP needs to switch the working subchannel occupied by the CAP in some cases. For example, when the CAP detects that the channel quality of a working subchannel is lower than the second set threshold on the network side, the working subchannel is received. The interference of other wireless communication systems is strong. At this time, not only the STAs on the working subchannel need to perform channel switching, but also the CAP can abandon the working subchannel, for example, only occupy other working subchannels currently occupied and/or select. New available subchannels. When the CAP switches its working subchannel, it can also change its working bandwidth.
  • the above new available subchannels are known by the CAP by scanning the channel list.
  • the CAP may also combine other factors, such as channel load and/or service requirements of the target STA, when making channel switching decisions. Taking the service requirement of the target STA as an example, it is assumed that the current target STA1 is performing the voice session service, and the target STA2 is performing the Internet access service. When the CAP selects the working subchannel to be switched to for the target STA1 and the target STA2, the working subchannel is considered. In addition to the channel quality, the current bearer service requirements of different target STAs can also be comprehensively considered.
  • the CAP may select, for the target STA1 that performs the voice service, a working subchannel that has the best available bandwidth but the best channel quality, and selects a working sub-channel with the best channel quality but larger available bandwidth for the target STA2 performing the Internet service. channel.
  • Step 33 The CAP sends a channel switch notification to each target STA.
  • the CAP may send a channel switching notification by means of broadcast.
  • the CAP may separately send a channel switching notification by using a unicast manner for each target STA.
  • the CAP starting channel number in the channel switching notification may be represented by 8 bits.
  • the working subchannel mapping in the channel switching notification can be implemented by using a 4-bit bitmap, each bit indicating the presence or absence of a working subchannel, wherein the most 4 bits correspond to the CAP occupied frequency band.
  • the most 4 working subchannels corresponding to the starting frequency.
  • the working subchannel supporting the CAP includes four subchannels of the 2.4G band, and the channel numbers are 1, 5, 9, and 13, respectively.
  • the center frequency is divided into 2412MHz, 2432MHz, 2452MHz, and 2472MHz.
  • the CAP starting channel number carried in the channel switching notification is 1, and the working subchannel mapping information is 0010, it indicates that the working subchannel to which the STA is to be handed over is the subchannel 5 whose center frequency is 2432 MHz. Since the channel number specified by the International Radio Committee is used in this way, a small number of bytes can be used to uniquely identify a channel, saving resources and realizing the convenience.
  • the channel switching notification may also carry one or more optional information as follows:
  • the channel switching mode may be 8 bits, indicating a restriction on the transmission during the channel switching, for example, the STA may be instructed to stop the data transmission before the channel switching;
  • the channel switching counter may be 8 bits indicating the length of time elapsed from the transmission of the channel switch notification to the STA switching to the target working subchannel, in units of broadcast information frame (BCF) intervals.
  • BCF broadcast information frame
  • the CAP working bandwidth is used to indicate that the current working bandwidth of the CAP is
  • the CAP can change the working bandwidth domain. After the STA knows this information, it can adjust in time when its working bandwidth is greater than the CAP working bandwidth.
  • the channel switching notification may be implemented in a channel switching notification frame.
  • Each type of information included in the channel switching notification corresponds to a field in the channel switching notification frame.
  • the field When the field is filled in the setting value, the field may be instructed to carry the field.
  • FIG. 4 is a schematic structural diagram of a channel switching notification frame according to an embodiment of the present invention, wherein a frame control field, a reserved field, and an FCS field have generally known meanings.
  • the CAP working bandwidth field carries the CAP working bandwidth
  • the CAP starting channel number field carries the CAP starting channel number
  • the working subchannel mapping field carries the working subchannel mapping
  • the channel switching mode field carries the channel switching mode
  • the channel switching counter field carries the channel switching counter.
  • FIG. 5 is a schematic structural diagram of another channel switching notification frame according to an embodiment of the present invention, and a spectrum aggregation mode field is added compared to FIG. 4.
  • Step 34 Perform channel switching.
  • the STA needs to complete the channel switching within the specified time period indicated by the channel switching counter, and the CAP also needs to complete the conversion of the frequency point for the target STA communication within the specified time period indicated by the channel switching counter.
  • step 32 the CAP decides to switch the working subchannel occupied by itself, in this step, the CAP also completes the switching of the working subchannel within a prescribed period of time indicated by the channel switching counter.
  • the process shown in Figure 3 also includes:
  • Step 35 CAP broadcast channel switching notification.
  • the working subchannel mapping carried in the channel switching notification indicates that the CAP performs the channel switching after the working subchannel.
  • An alternative implementation of the working subchannel mapping and the CAP starting channel number is the same as in step 33.
  • the channel switching notification may further carry a CAP working bandwidth and/or a spectrum aggregation mode between two or more working subchannels after the CAP performs channel switching.
  • FIG. 6 is a schematic diagram of a channel before and after switching in an application example 4 of the present invention, wherein a shaded portion is
  • Subchannel occupied by CAP or STA Subchannel occupied by CAP or STA.
  • the working subchannel of the CAP is channel 1 of the 2.4G band, and all STAs accessing the CAP also occupy the channel, and the working bandwidth of the CAP and the working bandwidth of all STAs are 20MHz.
  • the CAP decision switches the working subchannel to the channel 5 of the 2.4G band, and the working bandwidth of the channel is kept unchanged, and all STAs are used as the target STA, and the working subchannel corresponding to each target STA is channel 5.
  • the CAP sends a channel switch notification to all the STAs in the serving cell by means of a broadcast.
  • the CAP start channel number carried in the channel switch notification indicates the channel 5, and the working subchannel maps to 0001, that is, all the cells in the service cell are indicated.
  • the STA switches to channel 5.
  • the working subchannel of the CAP is channel 5, and all STAs of the serving cell camp on the channel 5, and the working bandwidth of the CAP and the working bandwidth of all STAs remain unchanged.
  • the CAP may also broadcast a channel switch notification, where the carried CAP start channel number indicates channel 5, the working subchannel maps to 0001, and the working bandwidth indicates 20 MHz, indicating to the STA its current working subchannel and working bandwidth.
  • FIG. 7 is a schematic diagram of a channel before and after switching in application example 5 of the present invention, wherein a shaded portion is
  • Subchannel occupied by CAP or STA Subchannel occupied by CAP or STA.
  • the working channel of the CAP is channel 1 and channel 5 of the 2.4G band, and all STAs reside on channel 1 and channel 5.
  • the working bandwidth of the CAP and the working bandwidth of all STAs are both 40MHz.
  • the CAP decision switches its working subchannel to channel 1, and its working bandwidth is changed to
  • the CAP sends a channel switching notification to all STAs in the serving cell by means of a broadcast.
  • the starting channel number carried in the channel switching notification indicates channel 1, and the working subchannel maps to 0001, that is, all STAs in the serving cell are indicated. Switch to channel 1.
  • the channel switching notification of the CAP broadcast also carries the target working bandwidth, indicating that the working bandwidth of the CAP will be changed to 20 MHz.
  • the working subchannel of the CAP is channel 1, and all the STAs of the serving cell camp on the channel 1, and the working bandwidth of the CAP and the working bandwidth of all the STAs of the serving cell are changed to 20 MHz.
  • the CAP may also broadcast a channel switching notification, where the carried CAP starting channel number indicates channel 1, the working subchannel mapping is 0001, and the working bandwidth indication is 20 MHz.
  • the STA indicates its current working subchannel and working bandwidth.
  • Application example four
  • FIG. 8 is a schematic diagram of a channel before and after channel switching in the sixth application example of the present invention, where the shaded portion is a subchannel occupied by a CAP or a STA.
  • the working subchannel of the CAP Prior to channel switching, the working subchannel of the CAP is channel 1 and channel 5 of the 2.4G band, STA1 resides on channel 1, and STA2 resides on channel 5.
  • the working bandwidth of the CAP is 40MHz, the working bandwidth of STA1 is 20MHz, and the working bandwidth of STA2 is 20MHz.
  • the CAP decision itself switches to channel 9 and channel 13 of the 2.4G band, and the working bandwidth of the channel is unchanged, and STA1 and STA2 are used as target STAs, and STA1 corresponds to STA1.
  • the working subchannel is channel 9, and the working subchannel corresponding to STA2 is channel 13.
  • the CAP sends a channel switching notification to the STA1 and the STA2 in a unicast manner, where the CAP starting channel number indication channel 9 carried in the channel switching notification sent to the STA1, the working subchannel mapping is 0001, and the channel switching notification sent to the STA2
  • the CAP start channel number carried in the channel indicates the channel 9, and the value of the working channel mapping information is 0010.
  • the working subchannels of the CAP are channel 9 and channel 13
  • STA1 resides on channel 9
  • STA2 resides on channel 13.
  • the working bandwidth of the CAP and the working bandwidth of STA1 and STA2 remain unchanged.
  • the CAP may also broadcast a channel switch notification, where the CAP start channel number indication channel 9, the working subchannel mapping is 0011, the working bandwidth indication is 40 MHz, and STA1 and STA2 are indicated to their current working subchannel and working bandwidth.
  • FIG. 9 is a schematic diagram of a channel before and after channel switching in the seventh application example of the present invention, where the shaded portion is a subchannel occupied by a CAP or a STA.
  • the working subchannel of the CAP is the 5G band channel 149, channel 153, channel 161 and channel 165, STA1 resides on channel 149 and channel 153, and STA2 resides on channel 153.
  • the working bandwidth of the CAP is 80MHz, the working bandwidth of STA1 is 40MHz, and the working bandwidth of STA2 is 20MHz.
  • the CAP decision itself does not perform channel switching, does not change its working bandwidth, and uses STA1 and STA2 as target STAs, and the working subchannel corresponding to STA1 is channel 161 and Channel 165, the working subchannel corresponding to STA2 is channel 165.
  • the CAP sends a channel switching notification to the STA1 and the STA2 in a unicast manner, where the CAP starting channel number indication channel 149 carried in the channel switching notification sent to the STA1, the working subchannel mapping is 1100, and the channel switching notification sent to the STA2
  • the CAP starting channel number carried in the indicator channel 149, and the working subchannel mapping is 0001.
  • STA1 resides on channel 161 and channel 165
  • STA2 resides on channel 165.
  • the working bandwidth of the CAP and the working bandwidth of STA1 and STA2 remain unchanged.
  • FIG. 10 is a schematic diagram of a channel before and after channel switching in the eighth application example of the present invention, where the shaded portion is a subchannel occupied by a CAP or a STA.
  • the working subchannel of the CAP is the channel 149, channel 153, channel 161 and channel 165 of the 5G band
  • STA1 camps on channel 149
  • STA2 resides on channel 149 and On channel 153.
  • the working bandwidth of the CAP is 80MHz
  • STAl The working bandwidth is 80MHz
  • the working bandwidth of STA2 is 40MHz.
  • the CAP decides not to use the channel temporarily, that is, the CAP selects the discontinuous channel 149, the channel 161, and the channel 165 as working subchannels, and the CAP does not change its working bandwidth, and STA1
  • the working subchannel corresponding to STA2 is the target STA
  • the working subchannel corresponding to STA1 is channel 149, channel 161 and channel 165
  • the working subchannel corresponding to STA2 is channel 161 and channel 165.
  • the CAP sends a channel switching notification to the STA1 and the STA2, and the CAP starting channel number indication channel 149 carried in the channel switching notification sent to the STA1, the working subchannel mapping is 1101, and is carried in the channel switching notification sent to the STA2.
  • the CAP start channel number indicates subchannel 149 and the working subchannel map is 0011.
  • FIG. 11 is a schematic structural diagram of an apparatus for channel switching according to an embodiment of the present invention, where the apparatus includes: a generating unit 111 and a transmitting unit 112.
  • the generating unit 111 is configured to generate a channel switching notification that carries the working subchannel mapping and the starting channel number.
  • the working subchannel mapping indicates the presence or absence of a plurality of working subchannels, and the lowest working subchannel of the plurality of working subchannels is a lowest working subchannel corresponding to a network side occupied frequency band starting frequency;
  • the channel number indicates the channel number of the lowest working subchannel corresponding to the frequency band starting frequency of the network side.
  • the sending unit 112 is configured to send the channel switching notification.
  • the device for channel switching in the embodiment of the present invention may be used to indicate that the terminal performs channel switching.
  • the working subchannel mapping carried by the channel switching notification indicates that the working terminal is to be switched to the working subchannel, and the starting channel number indicates the network side. The channel number of the lowest working subchannel corresponding to the frequency band starting frequency is occupied, and then the target terminal performs channel switching according to this parameter.
  • the apparatus for channel switching in the embodiment of the present invention may further notify the terminal in the serving cell of the handover result after the network side switches its working subchannel, and the working subchannel mapping indication network carried in the channel switching notification
  • the working subchannel after the channel switching is performed on the side, and the starting channel number indicates the channel number of the lowest working subchannel corresponding to the starting frequency of the occupied band of the network side.
  • the means for channel switching is located in the CAP.
  • 12 is a schematic structural diagram of an apparatus for channel switching in Application Example 7 of the present invention.
  • the apparatus includes: a generating unit 121, a sending unit 122, a determining unit 123, and a switching decision unit 124.
  • the generating unit 121 is configured to generate a channel switching notification that carries the working subchannel mapping and the CAP starting channel number.
  • the working subchannel mapping indicates the presence or absence of a plurality of working subchannels, and the lowest working subchannel of the plurality of working subchannels is a lowest working subchannel corresponding to a CAP occupied frequency band starting frequency;
  • the channel number indicates the channel number of the lowest working subchannel corresponding to the CAP occupied band start frequency.
  • the sending unit 122 is configured to send the channel switching notification.
  • the determining unit 123 is configured to determine channel quality of each working subchannel occupied by the network side. Specifically, the determining unit 123 can determine the channel quality of each working subchannel occupied by the network side in two ways. First, the determining unit 123 may determine the channel quality of each working subchannel occupied by the CAP by receiving the channel measurement result sent by each STA. Second, the determining unit 123 can measure the channel quality on the CAP side to determine the channel quality of each working subchannel occupied by the CAP.
  • the handover decision unit 124 is configured to perform channel switching decision according to the channel quality obtained by the determining unit 123.
  • the handover decision unit 124 determines, for each channel measurement result received by the terminal, that the channel measurement result reported by the terminal indicates that the channel quality of the working subchannel occupied by the terminal is low.
  • the terminal is used as the target terminal, and the target terminal is selected from other working subchannels and/or new available subchannels whose channel quality is higher than the first set threshold. Switch to the working subchannel.
  • the handover decision unit 124 uses the STA on the working subchannel whose channel quality is lower than the second set threshold as the target STA, and the channel quality occupied from the CAP is higher than the second setting.
  • the working subchannel to be switched to is selected for the target STA in the other working subchannels of the threshold and/or the new available subchannels.
  • the handover decision unit 124 may further combine the channel load and/or the service demand of the target STA when selecting the working subchannel to be handed over to the target STA.
  • the specific combination method has been described in detail in the method application example, and will not be described here.
  • the handover decision unit 124 selects the working subchannel to be switched to for the network side from the other working subchannels occupied by the CAP and/or the new available subchannels.
  • the handover decision unit 124 determines the target operating bandwidth on the network side.

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

Abstract

L'invention porte sur un procédé et un dispositif pour une utilisation dans un transfert intercellulaire de canal. Une notification de transfert intercellulaire de canal portant un mappage de sous-canal de travail et un numéro de canal de départ est transmise. Le mappage de sous-canal de travail est destiné à indiquer la présence ou l'absence de multiples sous-canaux de travail, un sous-canal de travail le plus bas parmi les multiples sous-canaux de travail étant le sous-canal de travail le plus bas correspondant à une fréquence de départ d'une bande de fréquences occupée par un côté réseau, tandis que le numéro de canal de départ est destiné à indiquer le numéro de canal du sous-canal de travail le plus bas correspondant à la fréquence de départ de la bande de fréquences occupée par le côté réseau. Le numéro de canal spécifique de chaque sous-canal de travail indiqué peut être acquis sur la base des deux éléments d'informations portés par la notification de transfert intercellulaire de canal, par comparaison à un procédé qui consiste à porter directement le numéro de canal dans la notification de transfert intercellulaire de canal, le procédé permettant un nombre réduit de bits utilisés, permettant ainsi de conserver un surdébit de signalisation.
PCT/CN2012/079645 2011-08-05 2012-08-03 Procédé et dispositif pour une utilisation dans un transfert intercellulaire de canal Ceased WO2013020483A1 (fr)

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CN201110224711.3A CN102917428B (zh) 2011-08-05 2011-08-05 信道切换方法及装置
CN201210034419 2012-02-15
CN201210034419.X 2012-02-15

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Cited By (1)

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WO2019076077A1 (fr) * 2017-10-20 2019-04-25 华为技术有限公司 Procédé de mesure de canal et équipement utilisateur

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US20080268887A1 (en) * 2007-02-26 2008-10-30 Nokia Corporation Multipoint data transmission
CN101521879A (zh) * 2008-02-27 2009-09-02 华为技术有限公司 无线信道切换方法及系统
WO2011093642A2 (fr) * 2010-01-26 2011-08-04 엘지전자 주식회사 Procédé de fonctionnement de station et appareil dans un blanc télévisuel

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Publication number Priority date Publication date Assignee Title
CN1572086A (zh) * 2000-09-15 2005-01-26 皇家菲利浦电子有限公司 用于ieee802.11wlan的动态信道选择方案
US20080268887A1 (en) * 2007-02-26 2008-10-30 Nokia Corporation Multipoint data transmission
CN101521879A (zh) * 2008-02-27 2009-09-02 华为技术有限公司 无线信道切换方法及系统
WO2011093642A2 (fr) * 2010-01-26 2011-08-04 엘지전자 주식회사 Procédé de fonctionnement de station et appareil dans un blanc télévisuel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019076077A1 (fr) * 2017-10-20 2019-04-25 华为技术有限公司 Procédé de mesure de canal et équipement utilisateur

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CN103609165A (zh) 2014-02-26

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