CN101854668A - Method, system and device for data transmission under MU-MIMO system - Google Patents
Method, system and device for data transmission under MU-MIMO system Download PDFInfo
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- CN101854668A CN101854668A CN200910081146A CN200910081146A CN101854668A CN 101854668 A CN101854668 A CN 101854668A CN 200910081146 A CN200910081146 A CN 200910081146A CN 200910081146 A CN200910081146 A CN 200910081146A CN 101854668 A CN101854668 A CN 101854668A
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Abstract
The invention discloses a method, a system and a device for data transmission under an MU-MIMO (multiple user-multiple input multiple output) system in order to solve the problem that the quality and rate of the data transmission can be affected by the existing manner for distributing scrambling codes under the MU-MIMO system. The method comprises the following steps: distributing at least one group of scrambling codes to each code block within the MU-MIMO system, wherein each group of scrambling codes comprises at least two scrambling codes and corresponds to at least one basic midamble code; and carrying out the data transmission by a base station according to the group of scrambling codes distributed to each user terminal and the resources adopted by each user terminal in the group of scrambling codes corresponding to the group of user terminals. According to the scheme provided by the invention, the invention can ensure that different scrambling codes can be distributed to different clients, i.e., different scrambling codes in the group of scrambling codes are used by the users using the same resources of the time-slot code channel, thus improving the quality and rate of the data transmission.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of multi-user's multiple-input and multiple-output (Multiple User Multiple Input Multiple Output, MU-MIMO) data transmission method in the system, system and device.
Background technology
Space division multiple access (Space Division Multiple Access, SDMA) technology mainly comprises: the spatial degrees of freedom that a plurality of users that take same asset utilize many antennas to provide is distinguished, thereby realize reception and transmission to a plurality of user's data, wherein, this resource comprises: time interval resource, code channel resource or frequency resource.Quoting of SDMA technology can effectively improve the average data transfer rate of sub-district.The implementation of this SDMA technology is relevant with the multi-antenna technology of employing.
In intelligent antenna array, use multi-beam figuration technology to carry out multi-user's sky branch, a plurality of main beams are aimed at the user who takies same asset carry out the reception and the transmission of data.Adopt this SDMA technology can improve the signal interference ratio of desired user, thereby improve the performance or the availability of frequency spectrum of system, and in this system, can carry out multiplexing to limited frequency spectrum resources by wave beam forming by wave beam forming.In the MIMO intelligent antenna array, use the MU-MIMO technology, because the user separates on the locus, carry out the processing of interference eliminated at transmitting terminal according to this apart characteristic, the transmitting terminal base station array antenna, according to the user who uses same asset, adopt different weight vectors at different user data, thereby reduce the interference between the user of this use same asset.
At time division duplex (Time Division Duplexing, TDD) high speed downlink packet inserts (High Speed Downlink Packet Access, HSPA) prolong in the system and used intelligent antenna technology, and in its follow-up evolution system HSPA+ system, introduced the MIMO technology, this just makes the TDD system have the basis of using the SDMA technology, and, therefore has very application prospects because this SDMA technology can satisfy the user and transmit data high-speed rate, jumbo demand.
But, in the TDD system, according to existing sign indicating number allocative decision, a scrambler is only distributed in each sub-district, every group of user who matches in the MU-MIMO system no matter the user of this pairing has been assigned with identical channel estimation window or different channel estimation windows, can use identical scrambler.And the use of identical scrambler makes when carrying out the application of SDMA technology, can not effectively reduce to take the intersymbol interference between the user of same channelization codes, especially taking under the less situation of code channel resource, intersymbol interference is more serious, thereby has influenced the transmission quality and the transmission rate of data in the MU-MIMO system.
Summary of the invention
In view of this, the embodiment of the invention provides data transmission method, system and the device among a kind of MU-MIMO, influences the transmission quality of data and the problem of transmission rate when the MU-MIMO system applies SDMA technology in order to solve the existing scrambler method of salary distribution.
Data transmission method among a kind of MU-MIMO that the embodiment of the invention provides, in this MU-MIMO, distribute at least one scrambler group for each code character, this each scrambler group comprises at least two scramblers, each scrambler group is corresponding with at least one basic middle midamble sign indicating number, and the process of this transfer of data comprises:
The base station sends resource allocation information to every assembly to the user terminal that divides into groups successful, and wherein, described every assembly is identical to the resource that the successful user terminal that divides into groups is assigned with;
In the scrambler group of base station according to this group user terminal correspondence, the corresponding scrambler for each described user terminal in this group distributes adopts described resource and each described user terminal to carry out transfer of data.
Data transmission system among a kind of MU-MIMO that the embodiment of the invention provides comprises:
Scrambler configuration set device is used to each code character to distribute at least one scrambler group, and this each scrambler group comprises at least two scramblers, and each scrambler group is corresponding with at least one basic midamble sign indicating number;
The base station, be used for the user terminal that divides into groups successful being sent resource allocation information to every assembly, wherein, described every assembly is identical to the resource that the successful user terminal that divides into groups is assigned with, and in the scrambler group according to this group user terminal correspondence, corresponding scrambler for each described user terminal in this group distributes adopts described resource and each described user terminal to carry out transfer of data;
User terminal is used to receive the resource allocation information that the base station sends, and adopts scrambler corresponding in the scrambler group to transmit data with described base station on described resource.
A kind of base station that the embodiment of the invention provides comprises:
The notice sending module is used for to every assembly the user terminal that divides into groups successful being sent resource allocation information, and wherein, described every assembly is identical to the resource that the successful user terminal that divides into groups is assigned with;
Data transmission module is used for adopting described resource to carry out transfer of data according at the corresponding scrambler of scrambler group for each described user terminal distribution with each described user terminal.
A kind of terminal that the embodiment of the invention provides comprises:
Receiver module is used to receive the resource allocation information that the base station sends;
Data transmission module is used for the corresponding scrambler according to the scrambler group, carries out transfer of data with described base station on described resource.
A kind of scrambler configuration set device that the embodiment of the invention provides comprises:
Configuration module is used for the number of the scrambler that comprises according to each scrambler group needs, the scrambler of the corresponding number of configuration in each scrambler group;
Distribution module is used at least one scrambler component is fitted on a code character;
Memory module is used for preserving at least one scrambler group of each code character, and this each scrambler group comprises at least two scramblers, and each scrambler group is corresponding with at least one basic midamble sign indicating number.
The embodiment of the invention provides data transmission method, system and the device among a kind of MU-MIMO, by at least one scrambler group is set in each code character, and each scrambler group is corresponding with at least one basic midamble sign indicating number, when carrying out transfer of data, in the scrambler group of base station according to this group user terminal correspondence, corresponding scrambler for each described user terminal in this group distributes adopts described resource transmission data with each described user terminal.In embodiments of the present invention because each scrambler group comprises at least two scramblers, different scrambler in this scrambler group that can guarantee to distribute into the different user end in every group, promptly use the user of identical time-slot code channel resource to adopt different scrambler in the scrambler group among this MU-MIMO, thereby can improve the transmission quality and the transmission rate of data.
Description of drawings
The sign indicating number allocative decision schematic diagram that Fig. 1 provides for the embodiment of the invention;
Data transmission procedure among the MU-MIMO that Fig. 2 provides for the embodiment of the invention;
Another data transmission procedure among the MU-MIMO that Fig. 3 A provides for the embodiment of the invention;
Data transmission system structural diagrams intention among the MU-MIMO that Fig. 3 B provides for the embodiment of the invention;
The structural representation of a kind of base station that Fig. 4 provides for the embodiment of the invention;
The structural representation of a kind of terminal that Fig. 5 provides for the embodiment of the invention;
The structural representation of a kind of scrambler configuration set device that Fig. 6 provides for the embodiment of the invention.
Embodiment
In the embodiment of the invention, in order to improve the transmission quality and the transmission rate of data effectively when the MU-MIMO system applies SDMA technology, data transmission method among a kind of MU-MIMO has been proposed, in this MU-MIMO, distribute at least one scrambler group for each code character, this each scrambler group comprises at least two scramblers, middle (midamble) sign indicating number is corresponding substantially with at least one for each scrambler group, the process of this transfer of data comprises: the base station is every group of user terminal Resources allocation, wherein, described every assembly is identical to the resource that the successful user terminal that divides into groups is assigned with, in the scrambler group of base station according to this group user terminal correspondence, corresponding scrambler for each described user terminal in this group distributes adopts described resource to carry out transfer of data with each described user terminal.In embodiments of the present invention because each scrambler group comprises at least two scramblers, different scrambler in this scrambler group that can guarantee to distribute into the different user end in every group, promptly use the user of identical time-slot code channel resource to adopt different scrambler in the scrambler group among this MU-MIMO, thereby can improve the transmission quality and the transmission rate of data.
Below in conjunction with Figure of description, the embodiment of the invention is elaborated.
In order to guarantee the scrambler difference of the pairing user among the MU-MIMO, in embodiments of the present invention, be at least two scramblers of each cell allocation, the sign indicating number allocative decision that Fig. 1 provides for the embodiment of the invention, promptly in the sign indicating number allocative decision that the embodiment of the invention provides, the descending synchronous code (SYNC-DL) that each code character (Code Group) comprises, uplink synchronous code (SYNC-UL), scrambler, in the corresponding relation between the basic midamble sign indicating number, comprise at least one scrambler group in each code character, comprise at least two scramblers in this scrambler group, and this scrambler group is corresponding with at least one basic midamble sign indicating number.
In the sign indicating number allocative decision that the embodiment of the invention provides, can keep the allocative decision of other yards except that scrambler in 32 code characters constant.In each code character, comprise a SYNC-DL, corresponding eight SYNC-UL of this SYNC-DL, and corresponding four basic midamble sign indicating numbers.Simultaneously, because using the different displacements of same basic midamble sign indicating number compares with using different basic midamble sign indicating numbers, use the different displacements of same basic midamble sign indicating number can obtain systematic function preferably, if and system's use is the midamble channel estimation method that is similar to joint-detection, when then the different displacements based on same basic midamble sign indicating number being detected, can eliminate most interference, and for when using different basic midamble sign indicating numbers to detect, then this basic midamble sign indicating number can be taken as interference and handles.Therefore, better based on the channel estimating performance of the different displacements of same basic midamble sign indicating number.Therefore, can still be adopted as basic midamble sign indicating number of each cell allocation in embodiments of the present invention.When promptly the user in MU-MIMO matches transmission in embodiments of the present invention, the corresponding scrambler group of each basic midamble sign indicating number, each scrambler group comprises at least two scramblers, and this scrambler group is corresponding with at least one basic midamble sign indicating number.
Corresponding at least one the basic midamble sign indicating number of each scrambler group, each basic midamble sign indicating number is corresponding with a scrambler group, wherein, comprises at least two scramblers in this scrambler group, and the correlation of these at least two scramblers that comprise in this scrambler group is lower, and orthogonality is better.Promptly each scrambler that comprises in this scrambler group calculates definite according to the correlation between scrambler.The quantity of the scrambler that comprises in this scrambler group can be determined according to pairing number of users in the sub-district.
Wherein calculate and determine to comprise that the method for at least two scramblers has multiple in each scrambler group.
Below introduce in detail the method for determining at least two scramblers in each scrambler group.When comprising two scramblers in each scrambler group, the method of determining two scramblers that each scrambler group comprises comprises: owing to always have 128 scramblers in the MU-MIMO system, these 128 scramblers are carried out cross-correlation calculation between any two, then, two scramblers that cross correlation is lower are divided into one group, be about to these 128 scramblers and be divided into 64 scrambler groups, each scrambler group comprises two scramblers that cross correlation is lower, and at least one the scrambler group in these 64 scrambler groups is divided in the code character, and this scrambler group is corresponding with at least one basic midamble sign indicating number in this code character, and this cross correlation that is divided into the scrambler between the scrambler group in the different code characters is lower, thereby can lower the phase mutual interference between the neighbor cell.
For example, a scrambler group in these 64 scrambler groups is divided in the code character, wherein this scrambler group is corresponding with four basic midamble sign indicating numbers in this code character; Perhaps two scrambler groups in these 64 scrambler groups are divided in the code character, wherein each the scrambler group in this code character is corresponding with at least one basic midamble sign indicating number respectively, for example this scrambler group is respectively the first scrambler group and the second scrambler group, four basic midamble sign indicating numbers that comprise are respectively, first, two, three and four basic midamble sign indicating numbers, wherein, the first scrambler group is corresponding with the first basic midamble sign indicating number, the second scrambler group and second, three is corresponding with four basic midamble sign indicating numbers, the perhaps first scrambler group and first, two basic midamble sign indicating numbers are corresponding, the second scrambler group and the 3rd, four basic midamble sign indicating numbers are corresponding or the like; Perhaps be divided into a code character with three in these 64 scrambler groups, wherein each the scrambler group in this code character is corresponding with at least one basic midamble sign indicating number respectively, for example one of them scrambler group is corresponding with two basic midamble sign indicating numbers, and each the scrambler group in two other scrambler group is corresponding with a basic midamble sign indicating number respectively; Perhaps be divided into a code character with four in these 64 scrambler groups, wherein each the scrambler group in this code character is corresponding with a basic midamble sign indicating number respectively.
When the scrambler that comprises in the scrambler group more than three, all scramblers that comprise in the MU-MIMO system are carried out correlation operation, number according to the scrambler that comprises in this scrambler group, the scrambler of the corresponding number that correlation is lower is divided in the scrambler group, and each scrambler component is fitted in the corresponding code character, each code character comprises at least one scrambler group, each scrambler group is corresponding with at least one basic midamble sign indicating number, and in the sign indicating number allocative decision, the cross correlation that is assigned to the scrambler between the scrambler group in the different code characters is lower.Carry out specifically that the scrambler group is determined and each scrambler component is fitted in each code character, and with the method for each scrambler group with the corresponding setting of a basic midamble sign indicating number, giving unnecessary details one by one not just here, believe that those skilled in the art can carry out concrete determining according to the description of the embodiment of the invention.
In embodiments of the present invention, also can in existing sign indicating number allocative decision, make amendment, thereby carry out determining and distribution of scrambler group, this process specifically comprises: the number of the scrambler that comprises according to needs in the scrambler group, scrambler in the code character of the corresponding number in the existing sign indicating number allocative decision is carried out cross match, the scrambler after the pairing is assigned in the code character of this correspondence number.
When each scrambler group need comprise two scramblers, the scrambler in two code characters is carried out cross match, then that two scramblers behind the cross match are right as a scrambler, and be assigned in the corresponding code character.The scrambler that for example comprises sign 0 to 3 in first code character, the scrambler that comprises sign 4 to 7 in second code character, four scramblers that comprise in four scramblers comprising in first code character and second code character are carried out cross match, for example will be designated 0 scrambler and be composed of the first scrambler group with the scrambler that is designated 4, the scrambler that is designated 1 is composed of the second scrambler group with the scrambler that is designated 5, the scrambler that is designated 2 is composed of the 3rd scrambler group with the scrambler that is designated 6, the scrambler that is designated 3 is composed of the 4th scrambler group with the scrambler that is designated 7, then at least one scrambler component is fitted in the code character, for example the first scrambler group is divided in first code character, this first scrambler group is corresponding with four basic midamble sign indicating numbers in this first code character, with second, the third and fourth scrambler group is divided in second code character, wherein the second scrambler group can be corresponding with two basic midamble sign indicating numbers in this second code character, the respectively corresponding basic midamble sign indicating number of the third and fourth scrambler group, perhaps any two scrambler groups are divided in each code character, wherein each scrambler group is corresponding with two basic midamble sign indicating numbers, perhaps also three scrambler groups can be divided in first code character, one of them scrambler group is corresponding with two basic midamble sign indicating numbers, two other scrambler group is corresponding with a basic midamble sign indicating number respectively, and concrete dividing mode can be provided with as required flexibly.
When the scrambler that comprises in each scrambler group more than three, according to the number of the scrambler that comprises in each scrambler group, the scrambler in the code character of this correspondence number is carried out cross match, the scrambler component after the pairing is fitted in the corresponding code character.For example, when comprising three scramblers in this scrambler group, with first code character, the scrambler that comprises in second code character and the 3rd code character carries out cross match, for example comprise in first code character and be designated 0 to 3 scrambler, comprise in second code character and be designated 4 to 7 scrambler, comprise in the 3rd code character and be designated 8 to 11 scrambler, and will be designated 0,4 and 8 scrambler cross match, form the first scrambler group, to be designated 1,5 and 9 scrambler cross match, form the second scrambler group, to be designated 2,6 and 10 scrambler cross match, form the 3rd scrambler group, to be designated 3,7 and 11 scrambler cross match, form the 4th scrambler group, and at least one the scrambler group behind the cross match is divided in the code character, for example the first scrambler group is divided in first code character, this first scrambler group is corresponding with four basic midamble sign indicating numbers in this code character in this first code character, the second scrambler group is divided in second code character, this second scrambler group is corresponding with four basic midamble sign indicating numbers in this code character in this second code character, the third and fourth scrambler group is divided in the 3rd code character, each scrambler group is corresponding with at least one basic midamble sign indicating number in the 3rd code character, for example, the 3rd scrambler group is corresponding with a basic midamble sign indicating number, the 4th scrambler group is corresponding with other three basic midamble sign indicating numbers, and perhaps each scrambler group is corresponding with two basic midamble sign indicating numbers respectively.
Believe those skilled in the art, can be according to the description of the embodiment of the invention, determine when comprise more a plurality of scrambler in the scrambler group, and each scrambler component is fitted on embodiment in each code character, just do not give unnecessary details one by one here.
In embodiments of the present invention can also be in existing sign indicating number allocative decision, at in each code character with the corresponding scrambler of each basic midamble sign indicating number, with this scrambler as main scrambler, according to this main scrambler, determine at least one auxilliary scrambler by high-rise real-time analysis or analysis in advance, at least one auxilliary scrambler and this main scrambler constitute a scrambler group with this, distribute to this corresponding code character.Wherein, by high-rise real-time analysis, perhaps analyze in the process of determining at least one auxilliary scrambler in advance, can comprise: scrambler configuration set device, radio network controller (Radio Network Controller for example, RNC), the scrambler that can be used for this sub-district is done and is gathered, wherein this scrambler that gathers comprises: untapped scrambler, or can with the scrambler of this cell reuse, wherein, this can comprise with the scrambler of this cell reuse: the scrambler that uses with the sub-district of this sub-district apart from each other, each scrambler in the scrambler that this is gathered and this main scrambler carry out correlation calculations then, determine at least one the lower scrambler of correlation with this main scrambler, with the auxilliary scrambler of this at least one scrambler as this main scrambler, should main scrambler and this at least one auxilliary scrambler constitute a scrambler group, distribute to the code character of this sub-district correspondence.
In embodiments of the present invention because each code character comprises at least one scrambler group, each scrambler group is corresponding with at least one basic midamble sign indicating number, wherein can in each scrambler group, determine a main scrambler, this main scrambler can be an optional scrambler in this scrambler group, also can be when comprise in this scrambler group with prior art in comprise in the corresponding code character in the sign indicating number allocative decision scrambler the time, with this scrambler as the main scrambler in this scrambler group.When having determined main scrambler in this scrambler group, can make the UE under no MIMO ability or the non-MIMO pattern use this main scrambler.
When code character of each cell allocation, wherein comprise at least one scrambler group in this code character in embodiments of the present invention, each scrambler group is corresponding with at least one basic midamble sign indicating number.Fig. 2 is the data transmission procedure among the MU-MIMO, and this process specifically comprises:
S201: the base station utilizes the channel estimation window of each user terminal to do channel estimating.
The base station utilizes each user's channel estimation window, i.e. the displacement of midamble sign indicating number when doing channel estimating, is obtained the channel fading of each user and base station.
S202: the base station is according to the channel estimation results of each user terminal, and each user terminal is matched grouping, and wherein, every assembly is assigned with identical resource informations such as time-slot code channel to the successful user terminal that divides into groups.
Wherein, the base station is according to the channel estimation results to each user terminal, each user is divided into groups to comprise: the base station is by some user terminal grouping algorithms commonly used, for example according to dispatching priority, each user terminal is carried out formation to be arranged, and calculate the degree of isolation of higher dispatching priority user terminal and other user terminal, user terminal in the sub-district is divided into groups, degree of isolation is bigger, when the pairing of satisfying MU-MIMO divides set condition, be divided into one group with the high-priority users terminal with user terminal that its degree of isolation satisfies the pairing condition, the base station is that every assembly distributes identical resource informations such as time-slot code channel to the user terminal that divides into groups successful.
S203: the terminal of every assembly to the successful user that divides into groups notified in the base station, is resource informations such as this each user terminal distributed time slot code channel, and sends the corresponding scrambling code information that this user terminal is assigned with to each user terminal in the scrambler group.
Wherein, High-Speed Shared Control Channel (High-Speed Shared Control Channel can be passed through in the base station, HS-SCCH) or strengthen dedicated channel (Enhanced Dedicated Channel, E-DCH) (E-DCH Absolute Grant Channel E-AGCH) notifies each user terminal to absolute grant channel.Every assembly is identical to the resource that the successful user terminal that divides into groups is assigned with.
The base station is comprising when user terminal sends scrambling code information: the base station can be by added bits means of signaling in HS-SCCH control channel or E-AGCH control channel, notify the scrambler of each user terminal, also can utilize the mode of the control signaling implicit state that is not used in the existing standard to notify each user terminal for its distribution.
S204: the base station is adopted this resource transmission data according to the corresponding scrambling code information of distributing for each user terminal with each user terminal in the scrambler group.
S205: each user terminal carries out transfer of data with this base station according to scrambling code information corresponding in the scrambler group that receives on this resource.
Specifically comprise: the base station is according to the corresponding scrambling code information that is assigned with for each user terminal in the scrambler group, the downlink data that the base station adopts this scrambler to send to terminal on this resource, and terminal can send upstream data to the base station according to this scrambler on this resource.
In the above-described embodiments, which scrambler that belongs in its scrambler group that is assigned with of user terminal and the channel estimation window of use are notified by added bits means of signaling in HS-SCCH control channel or E-AGCH control channel in the base station, when for example the base station sends control information by HS-SCCH control channel or E-AGCH control channel, the inside can comprise the resource allocation information of each user terminal, the scrambler assignment information that also can comprise each user terminal simultaneously, perhaps, the base station utilizes the mode of the control signaling implicit state that is not used in the existing standard to notify which scrambler in each user terminal scrambler group that it is assigned with and the channel estimation window of use.This detailed process is according to the difference of the channel estimation window of the user terminal use that the pairing grouping is successful among this MU-MIMO, and this process is also different, introduces in detail respectively below.
When every assembly among the MU-MIMO is used identical channel estimation window to the user terminal that divides into groups successful, each user terminal was according to traditional midamble sign indicating number allocative decision in then should organizing, know that the base station is the pairing channel estimation window of its distributed time slot code channel, and the channel estimation window of this each user terminal is identical;
For descending MU-MIMO, the base station can be by added bits signaling in the HS-SCCH control channel, perhaps utilize the implicit state mode of the control signaling that is not used in the existing standard to notify every assembly to the corresponding scrambler in its use scrambler group of successful user terminal of dividing into groups, for example, adopt the signaling information that some states are not defined on the current control channel, its that notify each user terminal in this group as implicit state with it uses the corresponding scrambler in scrambler group;
For up MU-MIMO, the base station can perhaps utilize the implicit state mode of the control signaling that is not used in the existing standard to notify the corresponding scrambler in its use scrambler group of each user terminal in this group by added bits signaling in the E-AGCH control channel.
Because in the embodiment of the invention, the quantity of the scrambler that comprises in each scrambler group is determined according to the quantity of the user terminal that the pairing grouping is successful in the sub-district, when the quantity of the scrambler that comprises in the scrambler group equals the quantity of the successful user terminal of sub-district pairing grouping, can guarantee to distribute different scrambler in this scrambler group for each user terminal in this group, promptly use the user of same channel estimating window to adopt different scrambler in the scrambler group among this MU-MIMO, thereby can improve the transmission quality and the transmission rate of data.
When the different channel estimation window of the successful user terminal use of pairing grouping among the MU-MIMO, each user terminal in then should organizing is according to special midamble sign indicating number allocative decision, know that the base station is its pattern (pattern) of distributing the channel estimation window of time-slot code channel correspondence, this process mainly comprises: when every assembly is two to the successful user terminal that divides into groups, these two user terminals take identical time-slot code channel resource, the channel estimation window of this code channel resource correspondence is divided into a pattern and the 2nd pattern, wherein a pattern and the 2nd pattern are respectively odd-numbered channels estimating window and even-numbered channels estimating window, the base station is by notifying this two user terminals at HS-SCCH control channel or E-AGCH control channel added bits signaling, adopt special midamble sign indicating number allocative decision, and which pattern as channel estimation window that need notify each user terminal to use.When every assembly comprises three when above to the successful user terminal that divides into groups, because this user terminal more than three takies identical time-slot code channel resource, with the channel estimation window of these code channel resources according to traditional midamble sign indicating number allocative decision correspondence, be divided into a plurality of pattern, wherein the number of the pattern of this division is identical to the number of the successful user terminal that divides into groups with every assembly, and each user terminal is assigned with a pattern in this group, the base station is by notifying each user terminal in this group in HS-SCCH control channel or E-AGCH control channel added bits signaling, adopt special midamble sign indicating number allocative decision, and which pattern as channel estimation window that need notify each user terminal to use.
Perhaps, the base station also can utilize the implicit state of the control signaling that is not used in the existing standard to notify every assembly to the successful user terminal that divides into groups, adopt special midamble sign indicating number allocative decision, and which pattern as channel estimation window that need notify each user terminal to use.
When every assembly receives the notice signaling that the base station sends by HS-SCCH control channel or E-AGCH control channel to the successful user terminal that divides into groups, each user terminal knows that according to this pattern the base station is the scrambler of its distribution, wherein this notice signaling comprises: the midamble sign indicating number allocative decision of employing, and the base station is the pattern of its allocated channel estimating window.
Each user terminal knows that according to this pattern the base station is that the detailed process of the scrambler of its distribution comprises: according to scrambler in each scrambler group in the sub-district that is provided with and the corresponding relation of each pattern in the midamble sign indicating number allocative decision, when received that the base station sends for the channel estimation window pattern information of its distribution the time, search the scrambler in the scrambler group of this pattern correspondence, thereby know that the base station is the scrambler of its distribution.For example, when in each scrambler group, comprising two scramblers, wherein two pattern in these two scramblers and the special midamble sign indicating number allocative decision have corresponding relation, for example, the one pattern of the first scrambler respective channels estimating window in this scrambler group, the 2nd pattern of the second scrambler respective channels estimating window, wherein the corresponding relation of each pattern of each scrambler and channel estimation window can be stipulated in agreement in this scrambler group, also can set up in the sub-district by RNC, sign indicating number is notified to the base station when dividing, and is notified to user terminal when user terminal inserts the sub-district.
Because in the embodiment of the invention, the quantity of the scrambler that comprises in each scrambler group is determined according to the quantity of the user terminal that the pairing grouping is successful in the sub-district, when the quantity of the scrambler that comprises in the scrambler group equals sub-district pairing number of users, can guarantee the successful user terminal that divides into groups to be distributed different scrambler in this scrambler group for every assembly, promptly use the user terminal of different channels estimating window among this MU-MIMO, adopt the different scrambler in the scrambler group, thereby can improve the transmission quality and the transmission rate of data.
In embodiments of the present invention, as shown in Figure 3A, user terminal also can be determined the corresponding scrambler in its scrambler group that is assigned with in the transmission course of data, and the process of this transfer of data comprises:
S301: the base station utilizes the channel estimation window of each user terminal to do channel estimating.
S302: the base station is according to the channel estimation results of each user terminal, and each user terminal is matched grouping, and wherein, every assembly is assigned with identical resource informations such as time-slot code channel to the successful user terminal that divides into groups.
S303: the terminal of every assembly to the successful user that divides into groups notified in the base station, is resource informations such as this each user terminal distributed time slot code channel.
S304: the base station sends downlink data according to the corresponding scrambling code information of distributing for each user terminal in the scrambler group to each user terminal.
S305: each user terminal carries out blind Detecting according to the downlink data that the base station sends, determine that according to testing result the base station is the corresponding scrambler of its distribution in the scrambler group, and adopt this scrambler to receive the data of this transmitted over resources, and adopt this scrambler on this resource, to send upstream data to the base station.
Specifically comprise: each user terminal carries out blind Detecting according to the downlink data that the base station sends, determine that according to testing result the base station is the corresponding scrambler of its distribution in the scrambler group, according to this scrambler in these transmitted over resources data, wherein comprise in these transmitted over resources data according to this scrambler: each user terminal adopts this scrambler to receive the downlink data that the base station sends on this resource, and can send upstream data to the base station on this resource according to this scrambler.
In the above-described embodiments, after having carried out the transmission of notice signaling among the MU-MIMO, can carry out transfer of data, the transmission course of this notice signaling and data comprises: in descending MU-MIMO, the base station sends to user terminal to control information by the HS-SCCH control channel earlier, this control information is same as the prior art, do not need the distribution of scrambler is given instruction, the base station utilizes the weights of uplink channel estimation calculating to send downlink data for each user on Traffic Channel then, every assembly is done blind Detecting to user terminal to downlink data, be that each user terminal uses each scrambler in several scrambler groups that this sub-district can distribute, in the substitution detection algorithm downlink traffic channel is done the detection decoding, determine that according to the result who detects the base station is the scrambler of its distribution, wherein when detection is correct, illustrate that then this scrambler is that the base station is the scrambler of its distribution.The scrambler that can obtain according to this detection receives base station data to its transmission on this resource.
In up MU-MIMO, every group of MU-MIMO user terminal sends upstream data on identical resources such as time-slot code channel.
Shown in Fig. 3 B, the embodiment of the invention provides the data transmission system among a kind of MU-MIMO, and this system comprises:
Scrambler configuration set device is used to each code character to distribute at least one scrambler group, and this each scrambler group comprises at least two scramblers, and each scrambler group is corresponding with at least one basic midamble sign indicating number;
The base station, be used for the user terminal that divides into groups successful being sent resource allocation information to every assembly, wherein, described every assembly is identical to the resource that the successful user terminal that divides into groups is assigned with, and in the scrambler group according to this group user terminal correspondence, corresponding scrambler for each described user terminal in this group distributes adopts described resource and each described user terminal to carry out transfer of data;
User terminal is used to receive the resource allocation information that the base station sends, and adopts scrambler corresponding in the scrambler group to carry out transfer of data with this base station on described resource.
As shown in Figure 4, the embodiment of the invention provides a kind of base station, and this base station comprises:
Notice sending module 401 is used for to every assembly the user terminal that divides into groups successful being sent resource allocation information, and wherein, described every assembly is identical to the resource that the successful user terminal that divides into groups is assigned with;
Described notice sending module 401 also is used for:
Corresponding scrambling code information according to each described user terminal in the scrambler group is assigned with sends notice to each described user terminal.
Described notice sending module 401 comprises:
The first notice transmitting element 4010 is used for sending the corresponding scrambling code information that this user terminal is assigned with in the scrambler group to each described user terminal.
Described notice sending module 401 comprises:
The second notice transmitting element 4011 is used for sending to each described user terminal the pattern information of the channel estimation window of the resource correspondence that this user terminal is assigned with.
Described notice sending module 401 comprises:
The 3rd notice transmitting element 4012 is used for the corresponding scrambling code information that is assigned with for each described user terminal according to the scrambler group, sends to each described user terminal by added bits means of signaling in the control channel and notifies.
Described announcement information sending module 401 comprises:
Four-way is known transmitting element 4013, is used for the corresponding scrambling code information that is assigned with according to each described user terminal of scrambler group, sends notice by the mode that adopts the control signaling implicit state that is not used to each described user terminal.
As shown in Figure 5, the embodiment of the invention provides a kind of terminal, and this terminal comprises
Described terminal also comprises:
Described determination module 501 comprises:
First determining unit 5010 is used for the pattern according to the channel estimation window of base station transmission, and each pattern of channel estimation window and the corresponding relation of each scrambler in the scrambler group, determines that the base station is the corresponding scrambler of its distribution in the scrambler group.
Described determination module 501 comprises:
Second determining unit 5011 is used for carrying out blind Detecting according to the downlink data that the base station sends, and determines that according to testing result the base station is the corresponding scrambler of its distribution in the scrambler group.
Fig. 6 comprises for the embodiment of the invention provides a kind of scrambler configuration set device:
Described configuration module 601 comprises:
First dispensing unit 6010 is used for and will carries out correlation operation between the scrambler, and the number of the scrambler that comprises according to needs in each scrambler group, and the correlation between scrambler are divided into a scrambler group with corresponding number scrambler.
Described configuration module 601 comprises:
Described configuration module 601 comprises:
The 3rd dispensing unit 6012, be used in each code character, with the scrambler that comprises in this code character with determine carry out correlation operation with the corresponding auxiliary scrambler of described scrambler, number according to the scrambler that comprises in each scrambler group, and with described code character in the correlation of the scrambler that comprises, the scrambler of corresponding number is divided into a scrambler group.
Wherein, this scrambler configuration set device can be RNC.
The embodiment of the invention provides data transmission method, system and the device among a kind of MU-MIMO, by at least one scrambler group is set in each code character, and each scrambler group is corresponding with at least one basic midamble sign indicating number, when carrying out transfer of data, in the scrambler group of base station according to this group user terminal correspondence, corresponding scrambler for each described user terminal in this group distributes adopts described resource transmission data with each described user terminal.In embodiments of the present invention because each scrambler group comprises at least two scramblers, different scrambler in this scrambler group that can guarantee to distribute into the different user end in every group, promptly use the user of identical time-slot code channel resource to adopt different scrambler in the scrambler group among this MU-MIMO, thereby can improve the transmission quality and the transmission rate of data.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (26)
1. the data transmission method among multi-user's multiple-input and multiple-output MU-MIMO, it is characterized in that, in this MU-MIMO, distribute at least one scrambler group for each code character, this each scrambler group comprises at least two scramblers, each scrambler group is corresponding with at least one basic middle midamble sign indicating number, and the process of this transfer of data comprises:
The base station sends resource allocation information to every assembly to the user terminal that divides into groups successful, and wherein, described every assembly is identical to the resource that the successful user terminal that divides into groups is assigned with;
In the scrambler group of base station according to this group user terminal correspondence, the corresponding scrambler for each described user terminal in this group distributes adopts described resource and each described user terminal to carry out transfer of data.
2. the method for claim 1 is characterized in that, before the described resource of described employing and each the described user terminal transmission data, described method also comprises:
Described base station sends notice to each described user terminal, and wherein this notice comprises the corresponding scrambling code information in the scrambler group that this user terminal is assigned with.
3. method as claimed in claim 2 is characterized in that, described base station sends notice to each described user terminal and comprises:
The base station sends notice by added bits means of signaling in the control channel to each described user terminal; Or
The base station sends notice by the mode that adopts the control signaling implicit state that is not used to each described user terminal.
4. method as claimed in claim 2 is characterized in that, when described every assembly was used identical channel estimation window to the user terminal that divides into groups successful, described base station sent notice to each described user terminal and comprises:
Described base station notifies every assembly to the channel estimation window of successful user terminal for the resource correspondence of its distribution that divide into groups;
In the notice scrambler group of described base station is the corresponding scrambler that each described user terminal distributes.
5. method as claimed in claim 2 is characterized in that, when described every assembly was used different channel estimation windows to the user terminal that divides into groups successful, described base station sent notice to each described user terminal and comprises:
Described base station notice is the pattern pattern of the channel estimation window of the resource correspondence of each described user terminal distribution.
6. method as claimed in claim 5 is characterized in that, described method also comprises:
Described each user terminal is according to the pattern of the channel estimation window that receives, and each pattern of channel estimation window and the corresponding relation of each scrambler in the scrambler group, determines that the base station is the corresponding scrambler of its distribution in the scrambler group.
7. the method for claim 1, it is characterized in that, described base station adopts described resource when described user terminal sends downlink data, each described user terminal carries out blind Detecting according to the downlink data that the base station sends, and determines that according to testing result the base station is the corresponding scrambler of its distribution in the scrambler group.
8. the method for claim 1 is characterized in that, described each code character distributes at least one scrambler group to comprise:
To carry out correlation operation between the scrambler, the number of the scrambler that comprises according to needs in each scrambler group, and the correlation between scrambler are divided into a scrambler group with corresponding number scrambler, and at least one described scrambler component is fitted in the code character.
9. the method for claim 1 is characterized in that, described each code character distributes at least one scrambler group to comprise:
The number of the scrambler that comprises according to needs in each scrambler group is selected the code character of corresponding number;
Scrambler in the code character of this correspondence number is carried out cross match, wherein, the number correspondent equal of the number of the scrambler that each the scrambler group behind the cross match comprises and the code character of selection is fitted at least one the scrambler component behind the cross match in the code character of described selection.
10. the method for claim 1 is characterized in that, described each code character distributes at least one scrambler group to comprise:
In each code character,, determine the scope of the auxiliary scrambler of described scrambler according to the scrambler in the described code character;
According to the correlation of each scrambler in the scope of scrambler in the described code character and described auxiliary scrambler, and need the number of the scrambler that comprises in each scrambler group, the scrambler of corresponding number is divided into a scrambler group, give described code character this scrambler set of dispense.
11. the method for claim 1 is characterized in that, comprises a main scrambler in described each scrambler group, wherein, the user terminal that described main scrambler is used under no MIMO ability or non-MIMO pattern provides.
12. the data transmission system among the MU-MIMO is characterized in that, comprising:
Scrambler configuration set device is used to each code character to distribute at least one scrambler group, and this each scrambler group comprises at least two scramblers, and each scrambler group is corresponding with at least one basic midamble sign indicating number;
The base station, be used for the user terminal that divides into groups successful being sent resource allocation information to every assembly, wherein, described every assembly is identical to the resource that the successful user terminal that divides into groups is assigned with, and in the scrambler group according to this group user terminal correspondence, corresponding scrambler for each described user terminal in this group distributes adopts described resource and each described user terminal to carry out transfer of data;
User terminal is used to receive the resource allocation information that the base station sends, and adopts scrambler corresponding in the scrambler group to carry out transfer of data with described base station on described resource.
13. a base station is characterized in that, comprising:
The notice sending module is used for to every assembly the user terminal that divides into groups successful being sent resource allocation information, and wherein, described every assembly is identical to the resource that the successful user terminal that divides into groups is assigned with;
Data transmission module is used for the scrambler group according to this group user terminal correspondence, and the corresponding scrambler for each described user terminal in this group distributes adopts described resource transmission data with each described user terminal.
14. base station as claimed in claim 13 is characterized in that, described notice sending module also is used for,
Corresponding scrambling code information according to each described user terminal in the scrambler group is assigned with sends notice to each described user terminal.
15. base station as claimed in claim 14 is characterized in that, described notice sending module comprises:
The first notice transmitting element is used for sending the corresponding scrambling code information that this user terminal is assigned with in the scrambler group to each described user terminal.
16. base station as claimed in claim 14 is characterized in that, described notice sending module comprises:
The second notice transmitting element is used for sending to each described user terminal the pattern information of the channel estimation window of the resource correspondence that this user terminal is assigned with.
17. base station as claimed in claim 14 is characterized in that, described notice sending module comprises:
The 3rd notice transmitting element is used for the corresponding scrambling code information that is assigned with in the scrambler group according to each described user terminal, sends notice by added bits means of signaling in the control channel to each described user terminal.
18. base station as claimed in claim 14 is characterized in that, described announcement information sending module comprises:
Four-way is known transmitting element, is used for the corresponding scrambling code information that is assigned with in the scrambler group according to each described user terminal, sends notice by the mode that adopts the control signaling implicit state that is not used to each described user terminal.
19. a terminal is characterized in that, comprising:
Receiver module is used to receive the resource allocation information that the base station sends;
Data transmission module is used for the corresponding scrambler according to the scrambler group, carries out transfer of data with described base station on described resource.
20. terminal as claimed in claim 19 is characterized in that, described terminal also comprises:
Determination module is used for determining the corresponding scrambler that is assigned with in the scrambler group.
21. terminal as claimed in claim 20 is characterized in that, described determination module comprises:
First determining unit is used for the pattern according to the channel estimation window of base station transmission, and each pattern of channel estimation window and the corresponding relation of each scrambler in the scrambler group, determines that the base station is the corresponding scrambler of its distribution in the scrambler group.
22. terminal as claimed in claim 20 is characterized in that, described determination module comprises:
Second determining unit is used for carrying out blind Detecting according to the downlink data that the base station sends, and determines that according to testing result the base station is the corresponding scrambler of its distribution in the scrambler group.
23. a scrambler configuration set device is characterized in that, comprising:
Configuration module is used for the number of the scrambler that comprises according to each scrambler group needs, the scrambler of the corresponding number of configuration in each scrambler group;
Distribution module is used at least one scrambler component is fitted on a code character;
Memory module is used for preserving at least one scrambler group of each code character, and this each scrambler group comprises at least two scramblers, and each scrambler group is corresponding with at least one basic midamble sign indicating number.
24. device as claimed in claim 23 is characterized in that, described configuration module comprises:
First dispensing unit is used for and will carries out correlation operation between the scrambler, and the number of the scrambler that comprises according to needs in each scrambler group, and the correlation between scrambler are divided into a scrambler group with corresponding number scrambler.
25. device as claimed in claim 23 is characterized in that, described configuration module comprises:
Second dispensing unit is used for the number of the scrambler that comprises according to each scrambler group needs, selects the scrambler in the code character of corresponding number to carry out cross match, and wherein the number of the scrambler that comprises of each the scrambler group after the pairing is equal with the corresponding number of the code character of selection.
26. device as claimed in claim 23 is characterized in that, described configuration module comprises:
The 3rd dispensing unit, be used in each code character, with the scrambler that comprises in this code character with determine carry out correlation operation with the corresponding auxiliary scrambler of described scrambler, number according to the scrambler that comprises in each scrambler group, and with described code character in the correlation of the scrambler that comprises, the scrambler of corresponding number is divided into a scrambler group.
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| CN200910081146A CN101854668A (en) | 2009-04-03 | 2009-04-03 | Method, system and device for data transmission under MU-MIMO system |
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| CN200910081146A CN101854668A (en) | 2009-04-03 | 2009-04-03 | Method, system and device for data transmission under MU-MIMO system |
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| CN102611486A (en) * | 2011-01-19 | 2012-07-25 | 中兴通讯股份有限公司 | Notification method and system of scrambling code identification signaling packet |
| CN103222323A (en) * | 2012-05-22 | 2013-07-24 | 华为技术有限公司 | Scheduling method and device for MU-MIMO |
| WO2013127056A1 (en) * | 2012-02-27 | 2013-09-06 | Qualcomm Incorporated | Estimation of interference power for secondary scrambling code |
| WO2015024227A1 (en) * | 2013-08-22 | 2015-02-26 | Telefonaktiebolaget L M Ericsson (Publ) | Method and apparatus for performing downlink mu-mimo transmission |
| CN104917544A (en) * | 2014-03-13 | 2015-09-16 | 电信科学技术研究院 | Scrambling code selection method and device |
| WO2015149477A1 (en) * | 2014-04-02 | 2015-10-08 | 中兴通讯股份有限公司 | Method and apparatus for implementing transparent multi-user multiple-input multiple-output transmission |
| WO2017132855A1 (en) * | 2016-02-03 | 2017-08-10 | 华为技术有限公司 | Data processing method, base station and terminal |
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| US9350507B2 (en) | 2011-01-19 | 2016-05-24 | Zte Corporation | Method and system for notification of scrambling code identification signalling group |
| WO2012097647A1 (en) * | 2011-01-19 | 2012-07-26 | 中兴通讯股份有限公司 | Method and device for notification of scrambling code identifier signaling set |
| CN102611486A (en) * | 2011-01-19 | 2012-07-25 | 中兴通讯股份有限公司 | Notification method and system of scrambling code identification signaling packet |
| CN102611486B (en) * | 2011-01-19 | 2018-03-16 | 中兴通讯股份有限公司 | A kind of Notification Method and system of scrambling code identification signaling group |
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| WO2015024227A1 (en) * | 2013-08-22 | 2015-02-26 | Telefonaktiebolaget L M Ericsson (Publ) | Method and apparatus for performing downlink mu-mimo transmission |
| US9888491B2 (en) | 2013-08-22 | 2018-02-06 | Telefonaktiebolaget L M Ericsson (Publ) | Method and apparatus for performing downlink MU-MIMO transmission |
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| CN104917544A (en) * | 2014-03-13 | 2015-09-16 | 电信科学技术研究院 | Scrambling code selection method and device |
| CN104980197A (en) * | 2014-04-02 | 2015-10-14 | 中兴通讯股份有限公司 | Method and device for realizing transparent multiple-user multiple-input multiple-output transmission |
| WO2015149477A1 (en) * | 2014-04-02 | 2015-10-08 | 中兴通讯股份有限公司 | Method and apparatus for implementing transparent multi-user multiple-input multiple-output transmission |
| US9948369B2 (en) | 2014-04-02 | 2018-04-17 | Zte Corporation | Method and apparatus for implementing transparent multi-user multiple-input multiple-output transmission |
| CN104980197B (en) * | 2014-04-02 | 2019-04-12 | 中兴通讯股份有限公司 | A kind of method and device for realizing transparent Multi-user mimo transmissions |
| WO2017132855A1 (en) * | 2016-02-03 | 2017-08-10 | 华为技术有限公司 | Data processing method, base station and terminal |
| CN111294852A (en) * | 2019-03-22 | 2020-06-16 | 展讯通信（上海）有限公司 | Downlink multi-user data transmission method and device, storage medium and terminal |
| US11503635B2 (en) | 2019-03-22 | 2022-11-15 | Spreadtrum Communications (Shanghai) Co., Ltd. | Method and device for performing downlink multiple user-multiple input muptiple output transmission, storage medium, and user equipment |
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