CN104540164A - Data transmission method, data transmission device and data transmission system - Google Patents
Data transmission method, data transmission device and data transmission system Download PDFInfo
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- CN104540164A CN104540164A CN201510050474.1A CN201510050474A CN104540164A CN 104540164 A CN104540164 A CN 104540164A CN 201510050474 A CN201510050474 A CN 201510050474A CN 104540164 A CN104540164 A CN 104540164A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/04—Arrangements for maintaining operational condition
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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
Abstract
The invention discloses a data transmission method, device and system of a cell for providing services by using an unlicensed spectrum, wherein the data transmission method comprises the following steps: when a service base station interacts data with the terminal by virtue of a downlink channel of the unlicensed spectrum, if the terminal detects that other service base stations need to interact data with other terminals by virtue of the downlink channel of the unlicensed spectrum, suspending data interaction with the service base stations, and sending channel occupied instructions to the other service base stations or the other terminals so that the other service base stations determine whether the downlink channel is occupied according to the channel occupied instructions. According to the technical scheme of the invention, the problem of transmission collision between LAA systems on the unlicensed spectrum and between the LAA systems and WIFI systems can be avoided.
Description
Technical field
The present invention relates to technical field of data transmission, the data transmission method using unlicensed spectrum to provide the community of service in particular to a kind of, a kind of use unlicensed spectrum to provide the community of service data transmission device and a kind of data transmission system using unlicensed spectrum to provide the community of service.
Background technology
Current, along with the fast development of mobile service, the existing capacity distributing to the wireless frequency spectrum of mobile service cannot meet the demands.In the 3GPP Rel-13 stage, the mechanism that one is called LAA (Licensed-Assisted Access) has been introduced into.In LAA mechanism, the transmission of mobile communication can carry in unlicensed spectrum, as the frequency range of 5GHz.In these unlicensed spectrum, mainly WiFi at present, bluetooth, radar, the systems such as medical treatment are in use.
Due to diversity and the complexity of system in unlicensed spectrum, be directly to ensure the fail safe of user and the stability of connection in unlicensed spectrum the mechanism of LTE.Therefore, in the mechanism of LAA, by CA mechanism, use authority frequency spectrum helps the access in unlicensed spectrum.At present, unlicensed spectrum uses LTE, system can have two kinds of working methods, and as shown in Figure 1A, one is supplementary descending SDL (Supplemental Downlink, auxiliary downlink transfer), namely only has downlink transfer subframe; As shown in Figure 1B, another kind is TDD (TimeDivision Duplex, time division duplex) pattern, and downstream transmission subframe all comprises.Supplementing descending this situation can only be use by carrier aggregation technology.
Unlicensed spectrum uses LAA, and what first will solve is the problem coexisted.One that coexists basic principle is that going that different systems can be fair takies unauthorized frequency range.The problem coexisted comprises coexisting between LAA and LAA, also comprises coexisting as WiFi of LAA and other unauthorized systems simultaneously.
Because current LAA base station does not have the function of WiFi, the signaling realizing coexisting between WiFi in that is traditional WiFi system cannot be applied directly in the system of LAA.Therefore, the problem of transmission collision may be there is.As shown in Figure 2, the scene that coexists of LAA system and WiFi system, because the terminal 1 of LAA base station and service cannot detect the transmission of WiFi AP for terminal 2, LAA base station can think that current channel is idle, thus sends data to service terminal 1.Therefore the transmission of LAA can interfere with the data receiver of terminal 2.Same problem also appears in the scene that coexists between LAA system and LAA system.
Therefore need a kind of new technical scheme, the problem that the transmission between the LAA system in unlicensed spectrum and between LAA and WiFi system is collided can be avoided.
Summary of the invention
The present invention, just based on the problems referred to above, proposes a kind of new technical scheme, can avoid the problem that the transmission between the LAA system in unlicensed spectrum and between LAA and WiFi system is collided.
In view of this, the present invention proposes a kind of data transmission method using unlicensed spectrum to provide the community of service, for terminal, comprise: when serving BS carries out data interaction by the down channel of unlicensed spectrum and described terminal, if described terminal detects that other serving BSs need to carry out data interaction by the down channel of described unlicensed spectrum and other-end, then suspend the data interaction between described serving BS, and transmitting channel has taken instruction to other serving BSs described or described other-end, take instruction for other serving BSs described according to described channel to determine whether to take described down channel.
When a serving BS carries out data interaction by the down channel of unlicensed spectrum and terminal, if another other serving BSs also need to carry out data interaction by this down channel and other-end, if then now other serving BSs carry out Channel Detection, because other serving BSs and other-end all cannot detect the downlink transfer between serving BS and terminal, therefore, other serving BSs can judge that current channel is idle, thus cause the problem of transmission collision.In this technical scheme, when terminal detects that other serving BSs also need to carry out data interaction by the down channel of unlicensed spectrum, namely when receiving the interference from other serving BSs, suspend the data interaction between terminal, and send a channel and take instruction, like this, will to know this channel when channel has taken instruction occupied receiving for other serving BSs, thus avoid the transmission collision problem that may occur, thus improve the validity of unlicensed spectrum.
Wherein, serving BS both can be LAA base station, also can be WIFI base station.
In technique scheme, preferably, also comprise: send after described channel takies instruction in described terminal, again recover the data interaction between described serving BS.
In this technical scheme, send after channel takies instruction in terminal, again recover the data interaction between serving BS, like this, can normal transmission between Deterministic service base station and terminal, promote the experience of user.
In technique scheme, preferably, also comprise: before described terminal and described serving BS carry out data interaction, receive the channel occupancy solicited message of described serving BS transmission when needs carry out data interaction by described down channel, and after receiving described channel occupancy solicited message, the confirmation that transmitting channel takies is to described serving BS, wherein, described channel occupancy solicited message comprises the temporal information of channel occupancy, the start point information of channel occupancy, the endpoint information of channel occupancy and/or transmit the running time-frequency resource information shared by confirmation of described channel occupancy.
In this technical scheme, when serving BS needs to be undertaken mutual by down channel and terminal, transmitting channel is needed to take solicited message, this channel occupancy solicited message comprises the temporal information of channel occupancy, the start point information of channel occupancy, the endpoint information of channel occupancy and/or transmits the running time-frequency resource information etc. shared by confirmation of described channel occupancy, thus make terminal can according to these channel occupancy solicited messages, determine whether that confirmation that transmitting channel takies is to serving BS.
In technique scheme, preferably, the confirmation that described transmitting channel takies, to described serving BS, specifically comprises: judge the working mechanism that described terminal is current; When described current working mechanism is for auxiliary downlink working transmission mechanism, described terminal sends the confirmation of described channel occupancy to described serving BS by the carrier wave that the main Serving cell of polymerization uses; When described current working mechanism is time division duplex transmission mechanism, described terminal by the running time-frequency resource in the described running time-frequency resource information of described channel occupancy solicited message, or sends the confirmation of described channel occupancy to described serving BS by predefined running time-frequency resource.
In this technical scheme, after the channel occupancy information channel occupancy solicited message of Terminal Service base station, there are two kinds of processing modes: processing mode 1, if when current working mechanism is auxiliary downlink working transmission mechanism, the confirmation that on the carrier wave that terminal will use in the main Serving cell of polymerization, transmitting channel takies, the carrier wave that main Serving cell uses has confirmed the information of channel occupancy by backhaul signaling serving BS terminal, and terminal also sends CTS information by WiFi port in unlicensed spectrum simultaneously.Processing mode 2, if when current working mechanism is time division duplex transmission mechanism, on the running time-frequency resource that the terminal transmission acknowledgement channel occupied information channel occupancy solicited message that terminal will indicate in channel occupancy information channel occupancy solicited message take or on predefined time-frequency location, directly send the information that upstream control signaling instruction acknowledgement channel takies.Particularly, upstream control signaling can multiplexing current LTE (Long Term Evolution, Long Term Evolution) existing PUCCH (Physical Uplink Control CHannel in system, Physical Uplink Control Channel), PUSCH (Physical Uplink Shared CHannel, Physical Uplink Shared Channel), PRACH (Physical Random Access CHannel), Physical Random Access Channel) etc. signaling format or new signaling.
In technique scheme, preferably, described channel has taken the endpoint information that instruction comprises the temporal information of channel occupancy, the start point information of channel occupancy and/or channel occupancy.In addition, it can be predefined that terminal transmitting channel has taken the resource that instruction uses, also can be by RRC (Radio Resource Control, wireless heterogeneous networks), MAC CE (MediumAccess Control, Control Element, medium education control element), O & M (Operation and Management, operation and management) or physical layer signaling configure.
In this technical scheme, the endpoint information of the temporal information of channel occupancy, the start point information of channel occupancy and channel occupancy is sent to the channel of other-end or other serving BSs to take in instruction to comprise in terminal, like this, be convenient to other serving BSs and determine whether busy channel according to the end time of this channel occupancy, and when busy channel.
According to a further aspect in the invention, additionally provide a kind of data transmission method using unlicensed spectrum to provide the community of service, for serving BS, comprise: when described serving BS needs to carry out data interaction by the down channel of unlicensed spectrum and terminal, transmitting channel takies solicited message to described terminal; Receive the confirmation of the channel occupancy that described terminal sends, and the channel receiving other-end transmission when being carried out data interaction by the down channel of described unlicensed spectrum and other serving BSs takies instruction, take instruction according to the confirmation of described channel occupancy and described channel and determined whether to take described down channel.
When a serving BS carries out data interaction by the down channel of unlicensed spectrum and terminal, if another other serving BSs also need to carry out data interaction by this down channel and other-end, if then now other serving BSs carry out Channel Detection, because other serving BSs and other-end all cannot detect the downlink transfer between serving BS and terminal, therefore, other serving BSs can judge that current channel is idle, thus cause the problem of transmission collision.In this technical scheme, when serving BS needs to use the down channel of unlicensed spectrum to carry out data interaction, solicited message can be taken to terminal by transmitting channel, and it not only receives the confirmation of the channel occupancy of self terminal, also can when this channel be occupied, receive the channel occupied information from other serving BSs, like this, serving BS just can determine whether to take this channel according to the confirmation of channel occupancy and channel occupied information, thus avoid the transmission collision problem that may occur, thus improve the validity of unlicensed spectrum.
In technique scheme, preferably, also comprise: described serving BS sends described channel occupancy solicited message to described terminal by physical layer descending control signal or pilot frequency information, wherein, described channel occupancy solicited message comprises the temporal information of channel occupancy, the start point information of channel occupancy, the endpoint information of channel occupancy and/or transmits the running time-frequency resource information shared by confirmation of described channel occupancy.
In this technical scheme, serving BS can by taking solicited message for public information transmission or the exclusive physical layer descending control signal transmitting channel of terminal, Channel holding time is contained in this information, channel occupancy starting point, end point, and terminal transmission acknowledgement channel takies the information such as the running time-frequency resource that solicited message takies.Or serving BS can send pilot frequency information and be used for notification channel holding time, channel occupancy starting point, end point and terminal transmission acknowledgement channel take the information such as the running time-frequency resource that solicited message takies.
In technique scheme, preferably, send described channel occupancy solicited message by described pilot frequency information specifically to comprise: the sequence used by time-frequency location or the described pilot tone of pilot tone is indicated the time of the channel occupancy in described channel occupancy solicited message, the starting point of channel occupancy, the end point of channel occupancy and/or transmits the running time-frequency resource shared by the confirmation of described channel occupancy.
Particularly, the sequence that can be used by the time-frequency location of pilot tone or pilot tone carry out indicating channel holding time, channel occupancy starting point, and end point and terminal transmission acknowledgement channel take the information such as the running time-frequency resource that solicited message takies.
In accordance with a further aspect of the present invention, additionally provide a kind of data transmission device using unlicensed spectrum to provide the community of service, for terminal, comprise: processing unit, when serving BS carries out data interaction by the down channel of unlicensed spectrum and described terminal, if detect, other serving BSs need to carry out data interaction by the down channel of described unlicensed spectrum and other-end, then suspend the data interaction between described serving BS, and transmitting channel has taken instruction to other serving BSs described or described other-end, take instruction for other serving BSs described according to described channel to determine whether to take described down channel.
When a serving BS carries out data interaction by the down channel of unlicensed spectrum and terminal, if another other serving BSs also need to carry out data interaction by this down channel and other-end, if then now other serving BSs carry out Channel Detection, because other serving BSs and other-end all cannot detect the downlink transfer between serving BS and terminal, therefore, other serving BSs can judge that current channel is idle, thus cause the problem of transmission collision.In this technical scheme, when terminal detects that other serving BSs also need to carry out data interaction by the down channel of unlicensed spectrum, namely when receiving the interference from other serving BSs, suspend the data interaction between terminal, and send a channel and take instruction, like this, will to know this channel when channel has taken instruction occupied receiving for other serving BSs, thus avoid the transmission collision problem that may occur, thus improve the validity of unlicensed spectrum.
Wherein, serving BS both can be LAA base station, also can be WIFI base station.
In technique scheme, preferably, also comprise: recovery unit, send after described channel takies instruction in described terminal, again recover the data interaction between described serving BS.
In this technical scheme, send after channel takies instruction in terminal, again recover the data interaction between serving BS, like this, can normal transmission between Deterministic service base station and terminal, promote the experience of user.
In technique scheme, preferably, also comprise: interactive unit, before described terminal and described serving BS carry out data interaction, receive the channel occupancy solicited message of described serving BS transmission when needs carry out data interaction by described down channel, and after receiving described channel occupancy solicited message, the confirmation that transmitting channel takies is to described serving BS, wherein, described channel occupancy solicited message comprises the temporal information of channel occupancy, the start point information of channel occupancy, the endpoint information of channel occupancy and/or transmit the running time-frequency resource information shared by confirmation of described channel occupancy.
In this technical scheme, when serving BS needs to be undertaken mutual by down channel and terminal, transmitting channel is needed to take solicited message, this channel occupancy solicited message comprises the temporal information of channel occupancy, the start point information of channel occupancy, the endpoint information of channel occupancy and/or transmits the running time-frequency resource information etc. shared by confirmation of described channel occupancy, thus make terminal can according to these channel occupancy solicited messages, determine whether that confirmation that transmitting channel takies is to serving BS.
In technique scheme, preferably, described interactive unit specifically for: judge the working mechanism that described terminal is current; When described current working mechanism is for auxiliary downlink working transmission mechanism, described terminal sends the confirmation of described channel occupancy to described serving BS by the carrier wave that the main Serving cell of polymerization uses; When described current working mechanism is time division duplex transmission mechanism, described terminal by the running time-frequency resource in the described running time-frequency resource information of described channel occupancy solicited message, or sends the confirmation of described channel occupancy to described serving BS by predefined running time-frequency resource.
In this technical scheme, after the channel occupancy solicited message of Terminal Service base station, there are two kinds of processing modes: processing mode 1, if when current working mechanism is auxiliary downlink working transmission mechanism, the confirmation that on the carrier wave that terminal will use in the main Serving cell of polymerization, transmitting channel takies, the carrier wave that main Serving cell uses has confirmed the information of channel occupancy by backhaul signaling serving BS terminal, and terminal also sends CTS information by WiFi port in unlicensed spectrum simultaneously.Processing mode 2, if when current working mechanism is time division duplex transmission mechanism, terminal will take on running time-frequency resource that solicited message takies in the terminal transmission acknowledgement channel of channel occupancy solicited message instruction or predefined time-frequency location directly send the information that upstream control signaling instruction acknowledgement channel takies.Particularly, upstream control signaling can signaling format or the new signaling such as existing PUCCH, PUSCH, PRACH in multiplexing current LTE system.
In technique scheme, preferably, described channel has taken the endpoint information that instruction comprises the temporal information of channel occupancy, the start point information of channel occupancy and/or channel occupancy.In addition, it can be predefined that terminal transmitting channel has taken the resource that instruction uses, also can be by RRC, MAC CE, O & M or physical layer signaling configuration.
In this technical scheme, the endpoint information of the temporal information of channel occupancy, the start point information of channel occupancy and channel occupancy is sent to the channel of other-end or other serving BSs to take in instruction to comprise in terminal, like this, be convenient to other serving BSs and determine whether busy channel according to the end time of this channel occupancy, and when busy channel.
According to a further aspect in the invention, additionally provide a kind of data transmission device using unlicensed spectrum to provide the community of service, for serving BS, comprise: transmitting element, when described serving BS needs to carry out data interaction by the down channel of unlicensed spectrum and terminal, transmitting channel takies solicited message to described terminal; And receiving element, receive the confirmation of the channel occupancy that described terminal sends, and the channel receiving other-end transmission when being carried out data interaction by the down channel of described unlicensed spectrum and other serving BSs takies instruction, take instruction according to the confirmation of described channel occupancy and described channel and determined whether to take described down channel.
When a serving BS carries out data interaction by the down channel of unlicensed spectrum and terminal, if another other serving BSs also need to carry out data interaction by this down channel and other-end, if then now other serving BSs carry out Channel Detection, because other serving BSs and other-end all cannot detect the downlink transfer between serving BS and terminal, therefore, other serving BSs can judge that current channel is idle, thus cause the problem of transmission collision.In this technical scheme, when serving BS needs to use the down channel of unlicensed spectrum to carry out data interaction, solicited message can be taken to terminal by transmitting channel, and it not only receives the confirmation of the channel occupancy of self terminal, also can when this channel be occupied, receive the channel occupied information from other serving BSs, like this, serving BS just can determine whether to take this channel according to the confirmation of channel occupancy and channel occupied information, thus avoid the transmission collision problem that may occur, thus improve the validity of unlicensed spectrum.
In technique scheme, preferably, described transmitting element specifically for: send described channel occupancy solicited message to described terminal by physical layer descending control signal or pilot frequency information, wherein, described channel occupancy solicited message comprises the temporal information of channel occupancy, the start point information of channel occupancy, the endpoint information of channel occupancy and/or transmits the running time-frequency resource information shared by confirmation of described channel occupancy.
In this technical scheme, serving BS can by taking solicited message for public information transmission or the exclusive physical layer descending control signal transmitting channel of terminal, Channel holding time is contained in this information, channel occupancy starting point, end point, and terminal transmission acknowledgement channel takies the information such as the running time-frequency resource that solicited message takies.Or serving BS can send pilot frequency information and be used for notification channel holding time, channel occupancy starting point, end point and terminal transmission acknowledgement channel take the information such as the running time-frequency resource that solicited message takies.
In technique scheme, preferably, described transmitting element specifically for: the sequence used by the time-frequency location of pilot tone or described pilot tone is indicated the time of the channel occupancy in described channel occupancy solicited message, the starting point of channel occupancy, the end point of channel occupancy and/or transmits the running time-frequency resource shared by the confirmation of described channel occupancy.
Particularly, the sequence that can be used by the time-frequency location of pilot tone or pilot tone carry out indicating channel holding time, channel occupancy starting point, and end point and terminal transmission acknowledgement channel take the information such as the running time-frequency resource that solicited message takies.
In accordance with a further aspect of the present invention, additionally provide the data transmission system in a kind of Serving cell of unlicensed spectrum, comprising: the use unlicensed spectrum for terminal according to any one of technique scheme provides the data transmission device of the community of service; And the use unlicensed spectrum for serving BS according to any one of technique scheme provides the data transmission device of the community of service.Wherein, the data transmission system in the Serving cell of unlicensed spectrum has provides with above-mentioned use unlicensed spectrum the technique effect that the data transmission device of the community of service is identical, does not repeat them here.
By above technical scheme, the problem that the transmission between the LAA system in unlicensed spectrum and between LAA and WiFi system is collided can be avoided.
Accompanying drawing explanation
Figure 1A and Figure 1B shows the schematic diagram of SDL pattern and tdd mode in correlation technique;
Fig. 2 shows and uses unlicensed spectrum to provide the community of service to carry out the structural representation of transfer of data;
Fig. 3 shows the flow chart that use unlicensed spectrum according to an embodiment of the invention provides the data transmission method of the community of service;
Fig. 4 use unlicensed spectrum shown according to another embodiment of the invention provides the flow chart of the data transmission method of the community of service;
Fig. 5 shows the block diagram that use unlicensed spectrum according to an embodiment of the invention provides the data transmission device of the community of service;
Fig. 6 use unlicensed spectrum shown according to another embodiment of the invention provides the block diagram of the data transmission device of the community of service;
Fig. 7 use unlicensed spectrum shown according to another embodiment of the invention provides the block diagram of the data transmission system of the community of service;
Fig. 8 shows and uses unlicensed spectrum to provide the community of service to carry out the structural representation of transfer of data;
Fig. 9 shows the particular flow sheet that use unlicensed spectrum according to an embodiment of the invention provides the data transmission method of the community of service.
Embodiment
In order to more clearly understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
Set forth a lot of detail in the following description so that fully understand the present invention; but; the present invention can also adopt other to be different from other modes described here and implement, and therefore, protection scope of the present invention is not by the restriction of following public specific embodiment.
Fig. 3 shows the flow chart that use unlicensed spectrum according to an embodiment of the invention provides the data transmission method of the community of service.
As shown in Figure 3, use unlicensed spectrum according to an embodiment of the invention provides the data transmission method of the community of service, for terminal, comprise: step 302, when serving BS carries out data interaction by the down channel of unlicensed spectrum and described terminal, if described terminal detects that other serving BSs need to carry out data interaction by the down channel of described unlicensed spectrum and other-end, then suspend the data interaction between described serving BS, and transmitting channel has taken instruction to other serving BSs described or described other-end, take instruction for other serving BSs described according to described channel to determine whether to take described down channel.
When a serving BS carries out data interaction by the down channel of unlicensed spectrum and terminal, if another other serving BSs also need to carry out data interaction by this down channel and other-end, if then now other serving BSs carry out Channel Detection, because other serving BSs and other-end all cannot detect the downlink transfer between serving BS and terminal, therefore, other serving BSs can judge that current channel is idle, thus cause the problem of transmission collision.In this technical scheme, when terminal detects that other serving BSs also need to carry out data interaction by the down channel of unlicensed spectrum, namely when receiving the interference from other serving BSs, suspend the data interaction between terminal, and send a channel and take instruction, like this, will to know this channel when channel has taken instruction occupied receiving for other serving BSs, thus avoid the transmission collision problem that may occur, thus improve the validity of unlicensed spectrum.
Wherein, serving BS both can be LAA base station, also can be WIFI base station.
In technique scheme, preferably, also comprise: send after described channel takies instruction in described terminal, again recover the data interaction between described serving BS.
In this technical scheme, send after channel takies instruction in terminal, again recover the data interaction between serving BS, like this, can normal transmission between Deterministic service base station and terminal, promote the experience of user.
In technique scheme, preferably, also comprise: before described terminal and described serving BS carry out data interaction, receive the channel occupancy solicited message of described serving BS transmission when needs carry out data interaction by described down channel, and after receiving described channel occupancy solicited message, the confirmation that transmitting channel takies is to described serving BS, wherein, described channel occupancy solicited message comprises the temporal information of channel occupancy, the start point information of channel occupancy, the endpoint information of channel occupancy and/or transmit the running time-frequency resource information shared by confirmation of described channel occupancy.
In this technical scheme, when serving BS needs to be undertaken mutual by down channel and terminal, transmitting channel is needed to take solicited message, this channel occupancy solicited message comprises the temporal information of channel occupancy, the start point information of channel occupancy, the endpoint information of channel occupancy and/or transmits the running time-frequency resource information etc. shared by confirmation of described channel occupancy, thus make terminal can according to these channel occupancy solicited messages, determine whether that confirmation that transmitting channel takies is to serving BS.
In technique scheme, preferably, the confirmation that described transmitting channel takies, to described serving BS, specifically comprises: judge the working mechanism that described terminal is current; When described current working mechanism is for auxiliary downlink working transmission mechanism, described terminal sends the confirmation of described channel occupancy to described serving BS by the carrier wave that the main Serving cell of polymerization uses; When described current working mechanism is time division duplex transmission mechanism, described terminal by the running time-frequency resource in the described running time-frequency resource information of described channel occupancy solicited message, or sends the confirmation of described channel occupancy to described serving BS by predefined running time-frequency resource.
In this technical scheme, after the channel occupancy solicited message of Terminal Service base station, there are two kinds of processing modes: processing mode 1, if when current working mechanism is auxiliary downlink working transmission mechanism, the confirmation that on the carrier wave that terminal will use in the main Serving cell of polymerization, transmitting channel takies, the carrier wave that main Serving cell uses has confirmed the information of channel occupancy by backhaul signaling serving BS terminal, and terminal also sends CTS information by WiFi port in unlicensed spectrum simultaneously.Processing mode 2, if when current working mechanism is time division duplex transmission mechanism, terminal will take on running time-frequency resource that solicited message takies in the terminal transmission acknowledgement channel of channel occupancy solicited message instruction or predefined time-frequency location directly send the information that upstream control signaling instruction acknowledgement channel takies.Particularly, upstream control signaling can signaling format or the new signaling such as existing PUCCH, PUSCH, PRACH in multiplexing current LTE system.
In technique scheme, preferably, described channel has taken the endpoint information that instruction comprises the temporal information of channel occupancy, the start point information of channel occupancy and/or channel occupancy.In addition, it can be predefined that terminal transmitting channel has taken the resource that instruction uses, also can be by RRC, MAC CE, O & M or physical layer signaling configuration.
In this technical scheme, the endpoint information of the temporal information of channel occupancy, the start point information of channel occupancy and channel occupancy is sent to the channel of other-end or other serving BSs to take in instruction to comprise in terminal, like this, be convenient to other serving BSs and determine whether busy channel according to the end time of this channel occupancy, and when busy channel.
Fig. 4 use unlicensed spectrum shown according to another embodiment of the invention provides the flow chart of the data transmission method of the community of service.
As shown in Figure 4, a kind of according to an embodiment of the invention data transmission method using unlicensed spectrum to provide the community of service, for serving BS, comprise: step 402, when described serving BS needs to carry out data interaction by the down channel of unlicensed spectrum and terminal, transmitting channel takies solicited message to described terminal; Step 404, receive the confirmation of the channel occupancy that described terminal sends, and the channel receiving other-end transmission when being carried out data interaction by the down channel of described unlicensed spectrum and other serving BSs takies instruction, take instruction according to the confirmation of described channel occupancy and described channel and determined whether to take described down channel.
When a serving BS carries out data interaction by the down channel of unlicensed spectrum and terminal, if another other serving BSs also need to carry out data interaction by this down channel and other-end, if then now other serving BSs carry out Channel Detection, because other serving BSs and other-end all cannot detect the downlink transfer between serving BS and terminal, therefore, other serving BSs can judge that current channel is idle, thus cause the problem of transmission collision.In this technical scheme, when serving BS needs to use the down channel of unlicensed spectrum to carry out data interaction, solicited message can be taken to terminal by transmitting channel, and it not only receives the confirmation of the channel occupancy of self terminal, also can when this channel be occupied, receive the channel occupied information from other serving BSs, like this, serving BS just can determine whether to take this channel according to the confirmation of channel occupancy and channel occupied information, thus avoid the transmission collision problem that may occur, thus improve the validity of unlicensed spectrum.
In technique scheme, preferably, also comprise: described serving BS sends described channel occupancy solicited message to described terminal by physical layer descending control signal or pilot frequency information, wherein, described channel occupancy solicited message comprises the temporal information of channel occupancy, the start point information of channel occupancy, the endpoint information of channel occupancy and/or transmits the running time-frequency resource information shared by confirmation of described channel occupancy.
In this technical scheme, serving BS can by taking solicited message for public information transmission or the exclusive physical layer descending control signal transmitting channel of terminal, Channel holding time is contained in this information, channel occupancy starting point, end point, and terminal transmission acknowledgement channel takies the information such as the running time-frequency resource that solicited message takies.Or serving BS can send pilot frequency information and be used for notification channel holding time, channel occupancy starting point, end point and terminal transmission acknowledgement channel take the information such as the running time-frequency resource that solicited message takies.
In technique scheme, preferably, send described channel occupancy solicited message by described pilot frequency information specifically to comprise: the sequence used by time-frequency location or the described pilot tone of pilot tone is indicated the time of the channel occupancy in described channel occupancy solicited message, the starting point of channel occupancy, the end point of channel occupancy and/or transmits the running time-frequency resource shared by the confirmation of described channel occupancy.
Particularly, the sequence that can be used by the time-frequency location of pilot tone or pilot tone carry out indicating channel holding time, channel occupancy starting point, and end point and terminal transmission acknowledgement channel take the information such as the running time-frequency resource that solicited message takies.
Fig. 5 shows the block diagram that use unlicensed spectrum according to an embodiment of the invention provides the data transmission device of the community of service.
As shown in Figure 5, a kind of according to an embodiment of the invention data transmission device 500 for terminal using unlicensed spectrum to provide the community of service, comprising: processing unit 502, recovery unit 504 and interactive unit 506.
Wherein, processing unit 502 for: when serving BS carries out data interaction by the down channel of unlicensed spectrum and described terminal, if detect, other serving BSs need to carry out data interaction by the down channel of described unlicensed spectrum and other-end, then suspend the data interaction between described serving BS, and transmitting channel has taken instruction to other serving BSs described or described other-end, has taken instruction determine whether to take described down channel for other serving BSs described according to described channel.
When a serving BS carries out data interaction by the down channel of unlicensed spectrum and terminal, if another other serving BSs also need to carry out data interaction by this down channel and other-end, if then now other serving BSs carry out Channel Detection, because other serving BSs and other-end all cannot detect the downlink transfer between serving BS and terminal, therefore, other serving BSs can judge that current channel is idle, thus cause the problem of transmission collision.In this technical scheme, when terminal detects that other serving BSs also need to carry out data interaction by the down channel of unlicensed spectrum, namely when receiving the interference from other serving BSs, suspend the data interaction between terminal, and send a channel and take instruction, like this, will to know this channel when channel has taken instruction occupied receiving for other serving BSs, thus avoid the transmission collision problem that may occur, thus improve the validity of unlicensed spectrum.
Wherein, serving BS both can be LAA base station, also can be WIFI base station.
In technique scheme, preferably, recovery unit 504, for after sending described channel in described terminal and taking instruction, recovers the data interaction between described serving BS again.
In this technical scheme, send after channel takies instruction in terminal, again recover the data interaction between serving BS, like this, can normal transmission between Deterministic service base station and terminal, promote the experience of user.
In technique scheme, preferably, interactive unit 506 is for before described terminal and described serving BS carry out data interaction, receive the channel occupancy solicited message of described serving BS transmission when needs carry out data interaction by described down channel, and after receiving described channel occupancy solicited message, the confirmation that transmitting channel takies is to described serving BS, wherein, described channel occupancy solicited message comprises the temporal information of channel occupancy, the start point information of channel occupancy, the endpoint information of channel occupancy and/or transmit the running time-frequency resource information shared by confirmation of described channel occupancy.
In this technical scheme, when serving BS needs to be undertaken mutual by down channel and terminal, transmitting channel is needed to take solicited message, this channel occupancy solicited message comprises the temporal information of channel occupancy, the start point information of channel occupancy, the endpoint information of channel occupancy and/or transmits the running time-frequency resource information etc. shared by confirmation of described channel occupancy, thus make terminal can according to these channel occupancy solicited messages, determine whether that confirmation that transmitting channel takies is to serving BS.
In technique scheme, preferably, described interactive unit 506 specifically for: judge the working mechanism that described terminal is current; When described current working mechanism is for auxiliary downlink working transmission mechanism, described terminal sends the confirmation of described channel occupancy to described serving BS by the carrier wave that the main Serving cell of polymerization uses; When described current working mechanism is time division duplex transmission mechanism, described terminal by the running time-frequency resource in the described running time-frequency resource information of described channel occupancy solicited message, or sends the confirmation of described channel occupancy to described serving BS by predefined running time-frequency resource.
In this technical scheme, after the channel occupancy solicited message of Terminal Service base station, there are two kinds of processing modes: processing mode 1, if when current working mechanism is auxiliary downlink working transmission mechanism, the confirmation that on the carrier wave that terminal will use in the main Serving cell of polymerization, transmitting channel takies, the carrier wave that main Serving cell uses has confirmed the information of channel occupancy by backhaul signaling serving BS terminal, and terminal also sends CTS information by WiFi port in unlicensed spectrum simultaneously.Processing mode 2, if when current working mechanism is time division duplex transmission mechanism, terminal will take on running time-frequency resource that solicited message takies in the terminal transmission acknowledgement channel of channel occupancy solicited message instruction or predefined time-frequency location directly send the information that upstream control signaling instruction acknowledgement channel takies.Particularly, upstream control signaling can signaling format or the new signaling such as existing PUCCH, PUSCH, PRACH in multiplexing current LTE system.
In technique scheme, preferably, described channel has taken the endpoint information that instruction comprises the temporal information of channel occupancy, the start point information of channel occupancy and/or channel occupancy.In addition, it can be predefined that terminal transmitting channel has taken the resource that instruction uses, also can be by RRC, MAC CE, O & M or physical layer signaling configuration.
In this technical scheme, the endpoint information of the temporal information of channel occupancy, the start point information of channel occupancy and channel occupancy is sent to the channel of other-end or other serving BSs to take in instruction to comprise in terminal, like this, be convenient to other serving BSs and determine whether busy channel according to the end time of this channel occupancy, and when busy channel.
Fig. 6 use unlicensed spectrum shown according to another embodiment of the invention provides the block diagram of the data transmission device of the community of service.
As shown in Figure 6, use unlicensed spectrum to provide the data transmission device 600 for serving BS of the community of service according to an embodiment of the invention, comprising: transmitting element 602, receiving element 604.
Wherein, when transmitting element 602 is for needing when described serving BS to carry out data interaction by the down channel of unlicensed spectrum and terminal, transmitting channel takies solicited message to described terminal; And receiving element 604, receive the confirmation of the channel occupancy that described terminal sends, and the channel receiving other-end transmission when being carried out data interaction by the down channel of described unlicensed spectrum and other serving BSs takies instruction, take instruction according to the confirmation of described channel occupancy and described channel and determined whether to take described down channel.
When a serving BS carries out data interaction by the down channel of unlicensed spectrum and terminal, if another other serving BSs also need to carry out data interaction by this down channel and other-end, if then now other serving BSs carry out Channel Detection, because other serving BSs and other-end all cannot detect the downlink transfer between serving BS and terminal, therefore, other serving BSs can judge that current channel is idle, thus cause the problem of transmission collision.In this technical scheme, when serving BS needs to use the down channel of unlicensed spectrum to carry out data interaction, solicited message can be taken to terminal by transmitting channel, and it not only receives the confirmation of the channel occupancy of self terminal, also can when this channel be occupied, receive the channel occupied information from other serving BSs, like this, serving BS just can determine whether to take this channel according to the confirmation of channel occupancy and channel occupied information, thus avoid the transmission collision problem that may occur, thus improve the validity of unlicensed spectrum.
In technique scheme, preferably, described transmitting element 602 specifically for: send described channel occupancy solicited message to described terminal by physical layer descending control signal or pilot frequency information, wherein, described channel occupancy solicited message comprises the temporal information of channel occupancy, the start point information of channel occupancy, the endpoint information of channel occupancy and/or transmits the running time-frequency resource information shared by confirmation of described channel occupancy.
In this technical scheme, serving BS can by taking solicited message for public information transmission or the exclusive physical layer descending control signal transmitting channel of terminal, Channel holding time is contained in this information, channel occupancy starting point, end point, and terminal transmission acknowledgement channel takies the information such as the running time-frequency resource that solicited message takies.Or serving BS can send pilot frequency information and be used for notification channel holding time, channel occupancy starting point, end point and terminal transmission acknowledgement channel take the information such as the running time-frequency resource that solicited message takies.
In technique scheme, preferably, described transmitting element 602 specifically for: the sequence used by the time-frequency location of pilot tone or described pilot tone is indicated the time of the channel occupancy in described channel occupancy solicited message, the starting point of channel occupancy, the end point of channel occupancy and/or transmits the running time-frequency resource shared by the confirmation of described channel occupancy.
Particularly, the sequence that can be used by the time-frequency location of pilot tone or pilot tone carry out indicating channel holding time, channel occupancy starting point, and end point and terminal transmission acknowledgement channel take the information such as the running time-frequency resource that solicited message takies.
Fig. 7 use unlicensed spectrum shown according to another embodiment of the invention provides the block diagram of the data transmission system of the community of service.
As shown in Figure 7, in accordance with a further aspect of the present invention, additionally provide the data transmission system 700 in a kind of Serving cell of unlicensed spectrum, comprising: the data transmission device 500 for terminal according to any one of technique scheme; And the data transmission device 600 for serving BS according to any one of technique scheme.Wherein, the data transmission system in the Serving cell of unlicensed spectrum has provides with above-mentioned use unlicensed spectrum the technique effect that the data transmission device of the community of service is identical, does not repeat them here.
In the present invention, it is similar that the collision between LAA system to be avoided with LAA system to the solution that the collision of WiFi system is avoided, and avoids technical scheme of the present invention is described below for the collision between the LAA system shown in Fig. 8.(wherein, assuming that LAA base station 2 is just at busy channel, and LAA base station 1 has downlink data to transmit.LAA base station 1 can be done CCA and be detected, and because LAA base station 1 and terminal 1 all cannot detect the downlink transfer of LAA system 2, therefore LAA base station 1 can judge that current channel is idle).
As shown in Figure 9, use unlicensed spectrum according to an embodiment of the invention provides the idiographic flow of the data transmission method of the community of service to comprise:
Step 902, LAA base station 1 transmitting channel takies solicited message to terminal 1.Particularly, LAA base station 1 can by taking solicited message for public information transmission or the exclusive physical layer descending control signal transmitting channel of terminal, Channel holding time is contained in this information, channel occupancy starting point, end point, and terminal transmission acknowledgement channel takies the information such as the running time-frequency resource that solicited message takies.Or LAA base station 1 can send pilot frequency information and be used for notification channel holding time, channel occupancy starting point, end point and terminal transmission acknowledgement channel take the information such as the running time-frequency resource that solicited message takies.The concrete sequence that can be used by the time-frequency location of pilot tone or pilot tone carry out indicating channel holding time, channel occupancy starting point, and end point and terminal transmission acknowledgement channel take the information such as the running time-frequency resource that solicited message takies.
Step 904, terminal 1, after the physical layer descending control signal receiving LAA base station 1 or pilot frequency information, has two kinds of processing modes:
Step 9042, processing mode 1: if when current working mechanism is SDL, the confirmation that terminal 1 will be taken by transmitting channel on the Pcell of polymerization, Pcell has confirmed the information of channel occupancy by backhaul signaling LAA base station 1 terminal 1.Terminal 1 also sends CTS information by WiFi port in unlicensed spectrum simultaneously.
Step 9044, processing mode 2: if when current working mechanism is TDD, the terminal transmission acknowledgement channel that terminal 1 will indicate in step 1 takies on running time-frequency resource that solicited message takies or predefined time-frequency location directly sends the information that up signaling instruction acknowledgement channel takies.Upstream control signaling can signaling format or the new signaling such as existing PUCCH, PUSCH, PRACH in multiplexing current LTE system.
Step 906, terminal 2, after receiving the interference from LAA base station 1, can temporarily stop the data interaction with LAA base station 2, and sends the instruction that a channel taken.This instruction comprises the information such as the end time of channel occupancy.Send indicate the running time-frequency resource that takies can be pre-define or can configure.After transmission terminates, terminal 2 can recover the transfer of data with LAA base station 2.
According to the information received, step 908, after LAA base station 1 have received the instruction of self terminal 2, determines that channel is busy and the time of channel occupancy.
More than be described with reference to the accompanying drawings technical scheme of the present invention, by technical scheme of the present invention, the problem that the transmission between the LAA system in unlicensed spectrum and between LAA and WiFi system is collided can have been avoided.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (17)
1. use unlicensed spectrum to provide a data transmission method for the community of service, for terminal, it is characterized in that, comprising:
When serving BS carries out data interaction by the down channel of unlicensed spectrum and described terminal, if described terminal detects that other serving BSs need to carry out data interaction by the down channel of described unlicensed spectrum and other-end, then suspend the data interaction between described serving BS, and transmitting channel has taken instruction to other serving BSs described or described other-end, has taken instruction determine whether to take described down channel for other serving BSs described according to described channel.
2. use unlicensed spectrum according to claim 1 provides the data transmission method of the community of service, it is characterized in that, also comprises:
Send after described channel takies instruction in described terminal, again recover the data interaction between described serving BS.
3. use unlicensed spectrum according to claim 1 provides the data transmission method of the community of service, it is characterized in that, also comprises:
Before described terminal and described serving BS carry out data interaction, receive the channel occupancy solicited message of described serving BS transmission when needs carry out data interaction by described down channel, and after receiving described channel occupancy solicited message, the confirmation that transmitting channel takies is to described serving BS, wherein, described channel occupancy solicited message comprises the temporal information of channel occupancy, the start point information of channel occupancy, the endpoint information of channel occupancy and/or transmits the running time-frequency resource information shared by confirmation of described channel occupancy.
4. use unlicensed spectrum according to claim 3 provides the data transmission method of the community of service, it is characterized in that, the confirmation that described transmitting channel takies, to described serving BS, specifically comprises:
Judge the working mechanism that described terminal is current;
When described current working mechanism is for auxiliary downlink working transmission mechanism, described terminal sends the confirmation of described channel occupancy to described serving BS by the carrier wave that the main Serving cell of polymerization uses;
When described current working mechanism is time division duplex transmission mechanism, described terminal by the running time-frequency resource in the described running time-frequency resource information of described channel occupancy solicited message, or sends the confirmation of described channel occupancy to described serving BS by predefined running time-frequency resource.
5. use unlicensed spectrum according to any one of claim 1 to 4 provides the data transmission method of the community of service, it is characterized in that, described channel has taken the endpoint information that instruction comprises the temporal information of channel occupancy, the start point information of channel occupancy and/or channel occupancy.
6. use unlicensed spectrum to provide a data transmission method for the community of service, for serving BS, it is characterized in that, comprising:
When described serving BS needs to carry out data interaction by the down channel of unlicensed spectrum and terminal, transmitting channel takies solicited message to described terminal;
Receive the confirmation of the channel occupancy that described terminal sends, and the channel receiving other-end transmission when being carried out data interaction by the down channel of described unlicensed spectrum and other serving BSs takies instruction, take instruction according to the confirmation of described channel occupancy and described channel and determined whether to take described down channel.
7. use unlicensed spectrum according to claim 6 provides the data transmission method of the community of service, it is characterized in that, also comprises:
Described serving BS sends described channel occupancy solicited message to described terminal by physical layer descending control signal or pilot frequency information, wherein, described channel occupancy solicited message comprises the temporal information of channel occupancy, the start point information of channel occupancy, the endpoint information of channel occupancy and/or transmits the running time-frequency resource information shared by confirmation of described channel occupancy.
8. use unlicensed spectrum according to claim 7 provides the data transmission method of the community of service, it is characterized in that,
Send described channel occupancy solicited message by described pilot frequency information specifically to comprise:
The sequence used by time-frequency location or the described pilot tone of pilot tone is indicated the time of the channel occupancy in described channel occupancy solicited message, the starting point of channel occupancy, the end point of channel occupancy and/or transmits the running time-frequency resource shared by the confirmation of described channel occupancy.
9. use unlicensed spectrum to provide a data transmission device for the community of service, for terminal, it is characterized in that, comprising:
Processing unit, when serving BS carries out data interaction by the down channel of unlicensed spectrum and described terminal, if detect, other serving BSs need to carry out data interaction by the down channel of described unlicensed spectrum and other-end, then suspend the data interaction between described serving BS, and transmitting channel has taken instruction to other serving BSs described or described other-end, has taken instruction determine whether to take described down channel for other serving BSs described according to described channel.
10. use unlicensed spectrum according to claim 9 provides the data transmission device of the community of service, it is characterized in that, also comprises:
Recovery unit, sends after described channel takies instruction in described terminal, again recovers the data interaction between described serving BS.
11. use unlicensed spectrum according to claim 9 provide the data transmission device of the community of service, it is characterized in that, also comprise:
Interactive unit, before described terminal and described serving BS carry out data interaction, receive the channel occupancy solicited message of described serving BS transmission when needs carry out data interaction by described down channel, and after receiving described channel occupancy solicited message, the confirmation that transmitting channel takies is to described serving BS, wherein, described channel occupancy solicited message comprises the temporal information of channel occupancy, the start point information of channel occupancy, the endpoint information of channel occupancy and/or transmits the running time-frequency resource information shared by confirmation of described channel occupancy.
12. use unlicensed spectrum according to claim 11 provide the data transmission device of the community of service, it is characterized in that, described interactive unit specifically for:
Judge the working mechanism that described terminal is current;
When described current working mechanism is for auxiliary downlink working transmission mechanism, described terminal sends the confirmation of described channel occupancy to described serving BS by the carrier wave that the main Serving cell of polymerization uses;
When described current working mechanism is time division duplex transmission mechanism, described terminal by the running time-frequency resource in the described running time-frequency resource information of described channel occupancy solicited message, or sends the confirmation of described channel occupancy to described serving BS by predefined running time-frequency resource.
13. use unlicensed spectrum according to any one of claim 9 to 12 provide the data transmission device of the community of service, it is characterized in that, described channel has taken the endpoint information that instruction comprises the temporal information of channel occupancy, the start point information of channel occupancy and/or channel occupancy.
14. 1 kinds of data transmission devices using unlicensed spectrum to provide the community of service, for serving BS, is characterized in that, comprising:
Transmitting element, when described serving BS needs to carry out data interaction by the down channel of unlicensed spectrum and terminal, transmitting channel takies solicited message to described terminal; And
Receiving element, receive the confirmation of the channel occupancy that described terminal sends, and the channel receiving other-end transmission when being carried out data interaction by the down channel of described unlicensed spectrum and other serving BSs takies instruction, take instruction according to the confirmation of described channel occupancy and described channel and determined whether to take described down channel.
15. use unlicensed spectrum according to claim 14 provide the data transmission device of the community of service, it is characterized in that,
Described transmitting element specifically for:
Described channel occupancy solicited message is sent to described terminal by physical layer descending control signal or pilot frequency information, wherein, described channel occupancy solicited message comprises the temporal information of channel occupancy, the start point information of channel occupancy, the endpoint information of channel occupancy and/or transmits the running time-frequency resource information shared by confirmation of described channel occupancy.
16. use unlicensed spectrum according to claim 15 provide the data transmission device of the community of service, it is characterized in that,
Described transmitting element specifically for:
The sequence used by time-frequency location or the described pilot tone of pilot tone is indicated the time of the channel occupancy in described channel occupancy solicited message, the starting point of channel occupancy, the end point of channel occupancy and/or transmits the running time-frequency resource shared by the confirmation of described channel occupancy.
Data transmission system in the Serving cell of 17. 1 kinds of unlicensed spectrum, is characterized in that, comprising:
The use unlicensed spectrum for terminal according to any one of claim 9 to 13 provides the data transmission device of the community of service;
The use unlicensed spectrum for serving BS according to any one of claim 14 to 16 provides the data transmission device of the community of service.
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| PCT/CN2015/080392 WO2016119355A1 (en) | 2015-01-30 | 2015-05-29 | Data transmission method, data transmission device and data transmission system |
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