CN106792727B - Uplink unauthorized non-orthogonal multiple access method, device, base station and user terminal - Google Patents
Uplink unauthorized non-orthogonal multiple access method, device, base station and user terminal Download PDFInfo
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- CN106792727B CN106792727B CN201610876808.5A CN201610876808A CN106792727B CN 106792727 B CN106792727 B CN 106792727B CN 201610876808 A CN201610876808 A CN 201610876808A CN 106792727 B CN106792727 B CN 106792727B
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0037—Inter-user or inter-terminal allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0058—Allocation criteria
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
Abstract
An uplink unauthorized non-orthogonal multiple access method, a device, a base station and a user terminal are provided, the method comprises the following steps: grouping all users to be subjected to uplink transmission, allocating different key characteristic resource elements to different group identifiers, allocating different physical unit number ranges to different group identifiers in the same group identifier, receiving uplink transmission data, confirming the group identifier of the user sending the uplink transmission data according to the key characteristic resource elements of the uplink transmission data, and confirming the group identifier of the user sending the uplink transmission data according to the number of the physical unit transmitting the uplink transmission data. The scheme of the invention can effectively avoid that a plurality of users adopt the same characteristic resource elements to carry out uplink data transmission on the same physical resources.
Description
Technical Field
The present invention relates to the field of uplink data transmission, and in particular, to an uplink unlicensed non-orthogonal multiple access method, apparatus, base station, and user terminal.
Background
In the fifth generation mobile communication technology, the technical scheme of non-orthogonal multiple access has potential advantages in improving the spectrum efficiency and throughput of the system, and meeting the requirements of large connection, low delay, high load and the like, thereby drawing extensive attention and intensive research in the industry.
The uplink non-orthogonal multiple access method based on the automatic transmission/authorization-free/competition mechanism has the following two characteristics: when a User Equipment (UE, also referred to herein as a User) transmits data in uplink, it is not necessary to obtain a dynamic and explicit scheduling grant from a base station; multiple users may share the same time-frequency resource. Therefore, for a given non-orthogonal multiple access resource, a user can directly transmit through the given non-orthogonal multiple access resource without waiting for a base station scheduling authorization when performing uplink data transmission.
The uplink non-orthogonal multiple access resource mainly comprises two parts: one part is physical resource, namely frequency resource block; another part is the characteristic resources brought about by the non-orthogonal multiple access technique. However, when multiple users use the same characteristic resource element to perform uplink data transmission on the same physical resource, the base station cannot distinguish the users, which results in data transmission failure.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an uplink unauthorized non-orthogonal multiple access method, which can effectively avoid that a plurality of users adopt the same characteristic resource elements to carry out uplink data transmission on the same physical resources.
In order to solve the above technical problem, an embodiment of the present invention provides an uplink unlicensed non-orthogonal multiple access method, including the following steps: grouping all users to be subjected to uplink transmission to determine a group identifier and an intra-group identifier of each user; allocating different key characteristic resource elements for different group identifiers, and informing the key characteristic resource elements corresponding to all the users to be subjected to uplink transmission, wherein the key characteristic resource elements are selected from characteristic elements of non-orthogonal multiple access characteristic resources; allocating different physical unit number ranges for different group identifiers in the same group identifier, and informing the physical unit number ranges corresponding to all the users to be subjected to uplink transmission, wherein the physical units are obtained by dividing non-orthogonal multiple access physical resources; receiving uplink transmission data, wherein the uplink transmission data are transmitted through one or more physical units, and each physical unit adopts the key characteristic resource elements corresponding to the user sending the uplink transmission data; and confirming the group identification of the user sending the uplink transmission data according to the key characteristic resource elements of the uplink transmission data, and confirming the in-group identification of the user sending the uplink transmission data according to the number of the physical unit transmitting the uplink transmission data.
Optionally, the non-orthogonal multiple access feature resource includes one or more of: a codebook, a codeword, a sequence, an interleaver, a mapping method of the interleaver, a demodulation reference signal, a preamble, a space domain resource and a power domain resource.
Optionally, when the non-orthogonal multiple access feature resource includes the demodulation reference signal, the key feature resource is the demodulation reference signal.
Optionally, the physical unit number ranges corresponding to the identifiers in different groups in the same group of identifiers are obtained by dividing the physical resources in an orthogonal manner.
Optionally, the orthogonal division modes of the physical resources used by different group identifiers are the same or different.
Optionally, the physical resource ranges adopted by different group identifiers are the same.
Optionally, each physical unit employs at least one feature resource, wherein each physical unit contains a complete feature element of the employed feature resource.
Optionally, the uplink unlicensed non-orthogonal multiple access method further includes: allocating other characteristic resource elements to different group identifiers, and informing the other characteristic resource elements of all the users to be subjected to uplink transmission, where the other characteristic resource elements are other characteristic elements except the key characteristic resource element in the non-orthogonal multiple access characteristic resource.
In order to solve the above technical problem, an embodiment of the present invention further provides another uplink unauthorized non-orthogonal multiple access method, including the following steps: determining key characteristic resource elements corresponding to users according to the indication of a base station, wherein the key characteristic resource elements are selected from characteristic elements of non-orthogonal multiple access characteristic resources, the users have group identifiers and in-group identifiers, and different group identifiers in the same group identifier correspond to different key characteristic resource elements; determining a physical unit number range corresponding to the user according to the indication of the base station, wherein different internal group identifications correspond to different physical unit number ranges; and sending uplink transmission data by adopting the physical unit number range, wherein the uplink transmission data is transmitted by one or more physical units, and each physical unit adopts the key characteristic resource elements.
Optionally, the non-orthogonal multiple access feature resource includes one or more of: a codebook, a codeword, a sequence, an interleaver, a mapping method of the interleaver, a demodulation reference signal, a preamble, a space domain resource and a power domain resource.
Optionally, when the non-orthogonal multiple access feature resource includes the demodulation reference signal, the key feature resource is the demodulation reference signal.
Optionally, the physical unit number ranges corresponding to the identifiers in different groups in the same group of identifiers are obtained by dividing the physical resources in an orthogonal manner.
Optionally, the orthogonal division modes of the physical resources used by different group identifiers are the same or different.
Optionally, the physical resource ranges adopted by different group identifiers are the same.
Optionally, each physical unit employs at least one feature resource, wherein each physical unit contains a complete feature element of the employed feature resource.
Optionally, the another uplink unlicensed non-orthogonal multiple access method further includes: determining other characteristic resource elements corresponding to the user according to the indication of the base station, wherein the other characteristic resource elements are other characteristic elements except the key characteristic resource elements in the non-orthogonal multiple access intervention characteristic resource; wherein the other characteristic resource elements are allocated according to the group identity.
In order to solve the above technical problem, an embodiment of the present invention further provides an uplink unlicensed non-orthogonal multiple access apparatus, including a grouping unit, adapted to group all users to be uplink-transmitted, so as to determine a group identifier and an intra-group identifier of each user; a first key characteristic resource element determining unit, adapted to allocate different key characteristic resource elements to different group identifiers and notify the key characteristic resource elements corresponding to all the users to be uplink-transmitted, wherein the key characteristic resource elements are selected from characteristic elements of non-orthogonal multiple access characteristic resources; a first physical unit number range determining unit, adapted to allocate different physical unit number ranges to different groups of identifiers in the same group of identifiers, and notify the physical unit number ranges corresponding to all the users to be uplink-transmitted, where the physical units are obtained by dividing non-orthogonal multiple access physical resources; a receiving unit, adapted to receive uplink transmission data, where the uplink transmission data is transmitted through one or more physical units, and each physical unit employs the key feature resource element corresponding to a user that sent the uplink transmission data; and the confirming unit is suitable for confirming the user group identification sending the uplink transmission data according to the key characteristic resource elements of the uplink transmission data and confirming the in-group identification of the user sending the uplink transmission data according to the serial number of the physical unit transmitting the uplink transmission data.
Optionally, the non-orthogonal multiple access feature resource includes one or more of: a codebook, a codeword, a sequence, an interleaver, a mapping method of the interleaver, a demodulation reference signal, a preamble, a space domain resource and a power domain resource.
Optionally, when the non-orthogonal multiple access feature resource includes the demodulation reference signal, the key feature resource is the demodulation reference signal.
Optionally, the physical unit number ranges corresponding to the identifiers in different groups in the same group of identifiers are obtained by dividing the physical resources in an orthogonal manner.
Optionally, the orthogonal division modes of the physical resources used by different group identifiers are the same or different.
Optionally, the physical resource ranges adopted by different group identifiers are the same.
Optionally, each physical unit employs at least one feature resource, wherein each physical unit contains a complete feature element of the employed feature resource.
Optionally, the uplink unlicensed multiple-access apparatus further includes a first other characteristic resource element determining unit, adapted to allocate other characteristic resource elements to different group identifiers and notify other characteristic resource elements of all users to be uplink-transmitted, where the other characteristic resource elements are other characteristic elements in the non-orthogonal multiple-access characteristic resources besides the key characteristic resource element.
In order to solve the above technical problem, an embodiment of the present invention further provides a base station, where the base station includes the above uplink unlicensed non-orthogonal multiple access apparatus.
In order to solve the above technical problem, an embodiment of the present invention further provides another uplink unlicensed non-orthogonal multiple access apparatus, including a second key feature resource element determining unit, adapted to determine, according to an indication of a base station, a key feature resource element corresponding to a user, where the key feature resource element is selected from feature elements of non-orthogonal multiple access feature resources, the user has a group identifier and an intra-group identifier, and different group identifiers correspond to different key feature resource elements; the second physical unit number range determining unit is suitable for determining the physical unit number range corresponding to the user according to the indication of the base station, wherein different group identifications in the same group identification correspond to different physical unit number ranges; and the sending unit is suitable for sending uplink transmission data by adopting the physical unit number range, the uplink transmission data is transmitted by one or more physical units, and each physical unit adopts the key characteristic resource elements.
Optionally, the another uplink unlicensed multiple access device further includes a second other characteristic resource element determining unit, adapted to determine, according to an instruction of the base station, other characteristic resource elements corresponding to the user, where the other characteristic resource elements are other characteristic elements in the non-orthogonal multiple access intervening characteristic resource than the key characteristic resource element.
In order to solve the above technical problem, an embodiment of the present invention further provides a user equipment, where the user equipment includes the above uplink unlicensed non-orthogonal multiple access apparatus.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
the embodiment of the invention groups all users to be transmitted in uplink so as to determine the group identifier and the in-group identifier of each user; allocating different key characteristic resource elements for different group identifiers, and informing the key characteristic resource elements corresponding to all the users to be subjected to uplink transmission, wherein the key characteristic resource elements are selected from characteristic elements of non-orthogonal multiple access characteristic resources; allocating different physical unit number ranges for different group identifiers in the same group identifier, and informing the physical unit number ranges corresponding to all the users to be subjected to uplink transmission, wherein the physical units are obtained by dividing non-orthogonal multiple access physical resources; receiving uplink transmission data, wherein the uplink transmission data are transmitted through one or more physical units, and each physical unit adopts the key characteristic resource elements corresponding to the user sending the uplink transmission data; and confirming the group identification of the user sending the uplink transmission data according to the key characteristic resource elements of the uplink transmission data, and confirming the in-group identification of the user sending the uplink transmission data according to the number of the physical unit transmitting the uplink transmission data. By adopting the embodiment of the invention, different key characteristic resources are pre-configured for different groups of users by grouping the users, different physical resources are pre-configured for the users in the same group, so that different users can be enabled to use different key characteristic resources or different physical resources, thereby effectively preventing different users from using the same characteristic resource elements to perform uplink data transmission on the same physical resources, enhancing the resolution capability of the base station on the users while ensuring the high reuse rate of the non-orthogonal multiple access resources, and further improving the success rate of the uplink non-authorized non-orthogonal multiple access data transmission.
Further, allocating other characteristic resource elements for different group identifiers, and informing the other characteristic resource elements of all the users to be subjected to uplink transmission. The embodiment of the invention allocates other available characteristic resources for the users, so that the base station can determine other characteristic resources according to the group identifier when receiving the uplink transmission data, and further adopts a demodulation scheme corresponding to other characteristic resources to demodulate and decode, thereby accurately obtaining the uplink transmission data of each user.
Further, the physical unit number ranges corresponding to the identifiers in different groups in the same group of identifiers are obtained by dividing the physical resources in an orthogonal manner, and the sizes of the physical resources divided by a plurality of users in the same user group can be the same or different, so that the selection of the division manner according to the actual system requirements in practical application is facilitated, and convenience is provided for the specific implementation of the embodiment of the invention.
Further, the physical resource orthogonal division modes adopted by different group identifiers are the same or different, that is, the same or different intra-group physical resource orthogonal division modes can be adopted among a plurality of user groups, which is beneficial to selecting the division modes according to the actual system requirements in practical application and provides convenience for the specific implementation of the embodiment of the invention.
Drawings
Fig. 1 is a flowchart of an uplink unlicensed multiple access method according to an embodiment of the present invention;
fig. 2 illustrates a physical resource partitioning manner in an embodiment of the present invention;
fig. 3 is an information flow diagram of another uplink unlicensed multiple access method in an embodiment of the present invention;
fig. 4 is a flowchart of another uplink unlicensed multiple access method in an embodiment of the present invention;
fig. 5 is an information flow diagram of another uplink unlicensed multiple access method in an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an uplink unlicensed non-orthogonal multiple access apparatus in an embodiment of the present invention;
fig. 7 is a schematic structural diagram of another uplink unlicensed non-orthogonal multiple access device in an embodiment of the present invention.
Detailed Description
The multiple access technology is a division basis of the former four generations of mobile communication, and thus plays a significant role in mobile communication. The former four generations of mobile communication have adopted an orthogonal Multiple Access scheme, from Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Code Division Multiple Access (CDMA) to Orthogonal Frequency Division Multiple Access (OFDMA). The 5G new air interface provides higher technical requirements for various application scenarios such as Enhanced Mobile Broadband (eMBB), ultra low latency high reliability Communication (URLLC), and Massive Machine type Communication (mtc). In order to meet the technical requirement of 5G, a technical scheme of non-orthogonal multiple access is provided on the basis of the traditional orthogonal multiple access scheme in the aspect of multiple access.
The 5G non-orthogonal multiple access technology can be combined with an automatic transmission/authorization-free/competition mechanism, and the time delay and the system signaling overhead can be effectively reduced. The uplink non-orthogonal multiple access method based on the automatic transmission/authorization-free/competition mechanism has the following two characteristics: when the user sends data in uplink, the user does not need to obtain dynamic and clear scheduling authorization from the base station side; multiple users may share the same time-frequency resource.
In the prior art, when different users use the same characteristic resource element to perform uplink data transmission on the same physical resource, the base station cannot distinguish the user source, resulting in data transmission failure.
The inventor of the present invention has found through research that the key of the above problem is that in the prior art, under the condition of lacking of dynamic and explicit scheduling grant, it is unavoidable that different users use the same characteristic resource element to perform uplink data transmission on the same physical resource.
The embodiment of the invention groups all users to be transmitted in uplink so as to determine the group identifier and the in-group identifier of each user; allocating different key characteristic resource elements for different group identifiers, and informing the key characteristic resource elements corresponding to all the users to be subjected to uplink transmission, wherein the key characteristic resource elements are selected from characteristic elements of non-orthogonal multiple access characteristic resources; allocating different physical unit number ranges for different group identifiers in the same group identifier, and informing the physical unit number ranges corresponding to all the users to be subjected to uplink transmission, wherein the physical units are obtained by dividing non-orthogonal multiple access physical resources; receiving uplink transmission data, wherein the uplink transmission data are transmitted through one or more physical units, and each physical unit adopts the key characteristic resource elements corresponding to the user sending the uplink transmission data; and confirming the group identification of the user sending the uplink transmission data according to the key characteristic resource elements of the uplink transmission data, and confirming the in-group identification of the user sending the uplink transmission data according to the number of the physical unit transmitting the uplink transmission data. By adopting the embodiment of the invention, different key characteristic resources are pre-configured for different groups of users by grouping the users, different physical resources are pre-configured for the users in the same group, different users can be enabled to adopt different key characteristic resources or adopt different physical resources, thereby effectively avoiding the different users from adopting the same characteristic resource elements to carry out uplink data transmission on the same physical resources, enhancing the resolution capability of the base station to the users while ensuring the high reuse rate of the non-orthogonal multiple access resources, and improving the success rate of the uplink non-authorized non-orthogonal multiple access data transmission
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Fig. 1 is a flowchart of an uplink unlicensed non-orthogonal multiple access method in an embodiment of the present invention. The uplink unlicensed-non-orthogonal multiple access method shown in fig. 1 is applied to the base station, and may include steps S101 to S105.
Step S101: and grouping all users to be subjected to uplink transmission to determine the group identification and the intra-group identification of each user.
Step S102: and allocating different key characteristic resource elements for different group identifiers, and informing the key characteristic resource elements corresponding to all the users to be subjected to uplink transmission, wherein the key characteristic resource elements are selected from the characteristic elements of the non-orthogonal multiple access characteristic resources.
Step S103: and allocating different physical unit number ranges for different identifiers in the same group of identifiers, and informing the physical unit number ranges corresponding to all the users to be subjected to uplink transmission, wherein the physical units are obtained by dividing non-orthogonal multiple access physical resources.
Step S104: receiving uplink transmission data, wherein the uplink transmission data are transmitted through one or more physical units, and each physical unit adopts the key characteristic resource elements corresponding to the user sending the uplink transmission data.
Step S105: and confirming the group identification of the user sending the uplink transmission data according to the key characteristic resource elements of the uplink transmission data, and confirming the in-group identification of the user sending the uplink transmission data according to the number of the physical unit transmitting the uplink transmission data.
In the specific implementation of step S101, at the initial stage of the resource pre-configuration effective interval, the base station groups all users to be uplink transmitted according to a preset grouping criterion, and the number of users included in different user groups may be the same or different. The user to be uplink transmitted is a user having an uplink data transmission requirement in a resource pre-configured effective interval, and may also be referred to as an uplink transmission activated user.
The user grouping criteria can be designed according to actual needs, for example, the user grouping criteria can be grouped according to the geographic location of the user. It should be noted that the user grouping criteria are not limited in the embodiments of the present invention.
Further, after grouping all the users to be transmitted in uplink, the base station further allocates a group identifier and an intra-group identifier to each user. The group identifier and the intra-group identifier are used to identify the user, i.e. the user can be uniquely identified by the group identifier and the intra-group identifier of one user.
In a specific implementation, after the base station allocates the unlicensed non-orthogonal multiple access resource to the users, the users may be indicated by the group identifier and the intra-group identifier allocated by the base station to each user.
Further, the manner in which the base station informs the all users to be uplink-transmitted of the respective key feature resource elements may be set according to actual conditions. Specifically, the key feature resource elements may be individually notified to the corresponding user group by the base station. More preferably, the base station may further notify all the key characteristic resource elements of the user groups to be transmitted uplink and the corresponding relationship between the key characteristic resource elements and the group identifier of each user group, and then each user obtains its own key characteristic resource element through the group identifier, which may save signaling overhead.
In the specific implementation of step S102, the base station allocates different key feature resource elements to different group identifiers, that is, allocates different key feature resource elements to users in different groups, and allocates the same key feature resource element to users in the same user group.
Wherein the key characteristic resource elements are selected from characteristic elements of non-orthogonal multiple access characteristic resources. The non-orthogonal multiple access feature resources may include one or more of: a codebook, a codeword, a sequence, an interleaver, a mapping method of the interleaver, a demodulation Reference Signal (DMRS), a preamble, a space domain resource, and a power domain resource.
Further, when the non-orthogonal multiple access characteristic resource includes the demodulation reference signal, the key characteristic resource is the demodulation reference signal, and the key characteristic resource element is a characteristic element of the demodulation reference signal. When the non-orthogonal multiple access characteristic resource does not include the demodulation reference signal, some other adopted characteristic resource can be selected as a key characteristic resource according to specific design, and the key characteristic resource element is a characteristic element of the selected key characteristic resource. This is because the demodulation reference signal is used for channel estimation and demodulation of the uplink channel, and has a wider application range compared to other characteristic resources, and when a demodulation reference signal resource collision occurs during uplink data transmission of a user, a base station may erroneously estimate a channel, so that a plurality of users with resource collision may be treated as one user, and data transmission may fail.
Further, each feature resource may include a plurality of feature elements, wherein each feature element may be used separately, and the base station and the user may distinguish different feature elements. For example, the demodulation reference signal may contain K characteristic elements: DMRS1，DMRS2，…，DMRSK。
In the specific implementation of step S103, the base station allocates different physical unit number ranges to different identifiers in the same group, that is, allocates different physical resources to different users in the same user group.
The physical resource is an uplink unauthorized non-orthogonal multiple access physical resource, is composed of a plurality of physical units, and can be represented by a physical unit number. Specifically, the physical unit is used for representing the minimum time-frequency resource for the non-orthogonal multiple access user to perform the unauthorized uplink transmission, and may consist of F carriers in the frequency domain and S time-domain symbols in the time domain, where F is greater than or equal to 1 and S is greater than or equal to 1. The specific values of F and S may be designed according to actual system requirements, and the embodiment of the present invention is not limited thereto.
In particular, for each physical unit, it may be co-occupied by a plurality of users from different user groups. However, different users from the same user group perform uplink data transmission via different physical units.
Further, in order to ensure that the identifiers in different groups in the same group of identifiers have different physical unit number ranges, the physical unit number ranges corresponding to the identifiers in different groups in the same group of identifiers can be obtained by dividing physical resources in an orthogonal manner, that is, the physical resources occupied by a plurality of users in the same group are not overlapped with each other.
Furthermore, the different group identifiers may use the same or different orthogonal partitioning manners of physical resources, that is, the same or different orthogonal partitioning manners of physical resources in the group may be used among a plurality of user groups.
Furthermore, the physical resource ranges used by different group identifiers are the same, so as to realize high multiplexing rate of the non-orthogonal multiple access resources.
Referring to fig. 2, fig. 2 shows a physical resource partitioning manner in the embodiment of the present invention. Specifically, the same or different orthogonal division modes of physical resources in the user group may be adopted between different user groups represented by the user group 1 and the user group N, a plurality of users are in the user group 1 represented by the user 1, the user 2 and the user m, and the base station may allocate physical resources of the same or different sizes to the users according to the specific transmission requirements of the users; similarly, there are a plurality of users in the user group N represented by the user a, the user b, and the user N, and the physical resources allocated to them by the base station may be the same or different. The minimum physical resource may be the physical unit, or the size of the minimum physical resource is an integer multiple of the size of the physical unit.
The embodiment of the invention is beneficial to selecting the division mode according to the actual system requirement in practical application, and provides convenience for specific implementation.
With reference to fig. 1, in a specific implementation of step S103, a manner in which the base station informs the physical unit number ranges corresponding to all the users to be uplink-transmitted may be set according to an actual situation. Specifically, the base station may notify the corresponding user of the physical unit number range alone. More preferably, the base station may further notify the complete physical unit number range of all the user groups to be subjected to uplink transmission and the corresponding relationship between the physical unit number range and the in-group identifier of each user group, and then each user obtains the own physical unit number range through the in-group identifier, which may save signaling overhead.
In the specific implementation of step S104, the base station receives uplink transmission data sent by a user, where the uplink transmission data is transmitted through one or more physical units, and each physical unit uses the key feature resource element corresponding to the user sending the uplink transmission data.
Specifically, when the base station receives uplink transmission data sent by a user, signal blind detection is performed to confirm the user sending the uplink transmission data. When a certain key characteristic resource element is detected on the physical unit, it can be confirmed that a user group corresponding to the key characteristic resource element exists and the user performs data transmission through the physical unit. When the base station detects a plurality of key characteristic resource elements on the physical unit, it can be confirmed that a plurality of user group existing users corresponding to the key characteristic resource elements perform data transmission through the physical unit.
It should be understood by those skilled in the art that each physical unit may be occupied by multiple users from different user groups, that is, one or more users may be used to send out uplink transmission data, and the key feature resource element used by the physical unit may be one or more. That is, each physical unit may employ a plurality of key characteristic resource elements corresponding to a plurality of users that send out uplink transmission data.
In a specific implementation of step S105, the group identifier of the user sending the uplink transmission data is determined according to the key feature resource element of the uplink transmission data, and the group identifier of the user sending the uplink transmission data is determined according to the number of the physical unit transmitting the uplink transmission data.
Specifically, when the base station performs blind detection on each received physical unit, one or more group identifiers of users transmitting data on the physical unit may be determined according to one or more key feature resource elements obtained through detection, and further, in a group corresponding to each obtained group identifier, an in-group identifier of one or more users transmitting data on the physical unit may be determined through a number of the physical unit. The base station can then uniquely determine the users transmitting on the physical unit by the obtained group identifier and the intra-group identifier, thereby determining all users performing non-orthogonal transmission on the physical unit.
Further, each physical unit employs at least one feature resource, wherein each physical unit contains a complete feature element of the employed feature resource. This is because, when the physical unit setting is too small, so that the supportable sequence length is smaller than the sequence length of the characteristic element employed, there is a possibility that a problem that the characteristic element cannot be completely carried occurs. For example, when demodulating DMRS (demodulation reference Signal) which is a characteristic element of a reference signal1When 12 subcarriers are included in the frequency domain and the physical unit is configured to include only 11 subcarriers in the frequency domain, the correct signal cannot be demodulated by a single received physical unit. Thus, in setting the size of the physical unit, the physical unit should be made available to contain the complete feature elements of the feature resource employed.
By adopting the embodiment of the invention, different key characteristic resources are pre-configured for different groups of users by grouping the users, different physical resources are pre-configured for the users in the same group, so that different users can be enabled to use different key characteristic resources or different physical resources, thereby effectively preventing different users from using the same characteristic resource elements to perform uplink data transmission on the same physical resources, enhancing the resolution capability of the base station on the users while ensuring the high reuse rate of the non-orthogonal multiple access resources, and further improving the success rate of the uplink non-authorized non-orthogonal multiple access data transmission.
Referring to fig. 3, fig. 3 is an information flow diagram of another uplink unlicensed multiple access method in the embodiment of the present invention, where the another uplink unlicensed multiple access method may include steps S301 to S311.
Step S301: the base station 31 groups all the users 32 to be transmitted uplink.
Step S302: the base station 31 allocates different key feature resource elements for different group identities.
Step S303: the base station 31 informs the user 32 of key feature resource elements.
In a specific implementation, please refer to the description of step S101 to step S102 in fig. 1 for more detailed information about step S301 to step S303, which is not described herein again.
Step S304: the base station 31 allocates other characteristic resource elements for different group identities.
Step S305: the base station 31 informs the user 32 of other characteristic resource elements.
In the specific implementation of step S304 and step S305, when the user 32 uses two or more feature resources, the base station 31 performs one-to-one mapping on other feature resource elements to the group identifier, and allocates other feature resource elements that can be used to each user group.
Specifically, the base station 31 allocates other characteristic resource elements to different group identifiers, and informs other characteristic resource elements of all the users to be uplink-transmitted, where the other characteristic resource elements are other characteristic elements in the non-orthogonal multiple access characteristic resource except the key characteristic resource element.
Further, the manner in which the base station 31 informs other characteristic resource elements corresponding to all the users to be uplink-transmitted may be set according to actual situations. Specifically, the base station 31 may notify the corresponding user 32 of other characteristic resource elements separately. More preferably, the base station 31 may also notify all other characteristic resource elements of all user groups to be transmitted uplink and the corresponding relationship between the other characteristic resource elements and the group identifier of each user group, and then each user obtains its own other characteristic resource elements through the group identifier, which may save signaling overhead.
Step S306: the base station 31 assigns different physical unit number ranges to different intra-group identifiers within the same group identifier.
Step S307: the base station 31 informs the user 32 of the physical unit number range.
Step S308: the base station 31 receives uplink transmission data from the user 32.
Step S309: the base station 31 confirms the group identity of the user 32 from the key feature resource elements.
Step S310: the base station 31 confirms the intra-group identity of the user 32 from the number of each physical unit.
In the specific implementation, please refer to the description of step S103 to step S105 in fig. 1 for more detailed information about step S306 to step S310, which is not described herein again.
Step S311: the base station 31 correctly obtains the uplink transmission data of the user 32 according to other characteristic resource elements.
In the specific implementation of step S311, after the base station 31 performs blind detection on the physical unit and confirms the group identifier of the user 32 sending the uplink transmission data, it may determine other characteristic resource elements allocated to the group identifier, and further may demodulate and decode the received signal by using a demodulation scheme corresponding to other characteristic resources, thereby correctly obtaining the uplink transmission data of each user.
Fig. 4 is a flowchart of another uplink unlicensed multiple access method in an embodiment of the present invention. Fig. 4 shows another uplink unlicensed-non-orthogonal multiple access method for a user equipment, which may include steps S401 to S403.
Step S401: determining key characteristic resource elements corresponding to users according to the indication of a base station, wherein the key characteristic resource elements are selected from characteristic elements of non-orthogonal multiple access characteristic resources, the users have group identifications and in-group identifications, and different group identifications correspond to different key characteristic resource elements.
Step S402: and determining the number range of the physical unit corresponding to the user according to the indication of the base station, wherein different group identifiers in the same group identifier correspond to different number ranges of the physical unit.
Step S403: and sending uplink transmission data by adopting the physical unit number range, wherein the uplink transmission data is transmitted by one or more physical units, and each physical unit adopts the key characteristic resource elements.
In the specific implementation of steps S401 to S402, the manner in which the user determines the key feature resource element and the physical unit number range corresponding to the user according to the indication of the base station may be set according to the actual situation. In particular, the corresponding key feature resource elements and physical unit number ranges may be directly known from the base station. And acquiring all key characteristic resource elements and physical unit number ranges and the corresponding relation between the key characteristic resource elements and physical unit number ranges and the group identification and the intra-group identification of each user from the base station, and then acquiring the corresponding key characteristic resource elements and physical unit number ranges through the self group identification and the intra-group identification.
For more detailed information about steps S401 to S403, please refer to the description of steps S101 to S105 in fig. 1, which is not repeated herein.
Referring to fig. 5, fig. 5 is an information flow diagram of another uplink unlicensed multiple access method in an embodiment of the present invention. The another uplink unlicensed non-orthogonal multiple access method may include steps S501 to S507.
Step S501: the user 52 receives key feature resource elements from the base station 51.
Step S502: the key feature resource elements corresponding to the user 52 are determined.
Step S503: the user 52 receives other characteristic resource elements from the base station 51.
Step S504: other feature resource elements corresponding to the user 52 are determined.
In the specific implementation of steps S503 to S504, other feature resource elements corresponding to the user 52 may be determined according to the indication of the base station 51, where the other feature resource elements are other feature elements than the key feature resource element in the non-orthogonal multiple access intervening feature resource.
Wherein the other characteristic resource elements are allocated according to the group identity.
Further, the manner of the user 52 determining other characteristic resource elements corresponding to the user 52 according to the indication of the base station 51 may be set according to actual situations. Specifically, the user 52 can directly know the corresponding other characteristic resource elements from the base station 51. The user 52 may also obtain all other characteristic resource elements and the corresponding relationship between the other characteristic resource elements and the group identifier of each user from the base station 51, and then obtain the corresponding other characteristic resource elements through the group identifier of the user.
Step S505: the user 52 receives the physical unit number range from the base station 51.
Step S506: the physical unit number range corresponding to the user 52 is determined.
Step S507: the user 52 sends uplink transmission data to the base station 51 using the physical unit number range, where each physical unit uses the key feature resource element.
For more detailed information about steps S501 to S507, please refer to steps S101 to S105 in fig. 1, and steps S401 to S403 in fig. 4, which are not described herein again.
Fig. 6 is a schematic structural diagram of an uplink unlicensed non-orthogonal multiple access apparatus in an embodiment of the present invention. As shown in fig. 6, the uplink unlicensed non-orthogonal multiple access device may include a grouping unit 61, a first key characteristic resource element determining unit 62, a first physical unit number range determining unit 63, a receiving unit 64, a confirming unit 65, and a first other characteristic resource element determining unit 66.
The grouping unit 61 is adapted to group all users to be uplink-transmitted, so as to determine a group identifier and an intra-group identifier of each user. The first key feature resource element determining unit 62 is adapted to allocate different key feature resource elements for different group identifiers, and inform the key feature resource elements corresponding to all the users to be uplink-transmitted, where the key feature resource elements are selected from feature elements of non-orthogonal multiple access feature resources. The first physical unit number range determining unit 63 is adapted to allocate different physical unit number ranges to different identifiers in the same group of identifiers, and notify the physical unit number ranges corresponding to all the users to be uplink-transmitted, where the physical units are obtained by dividing non-orthogonal multiple access physical resources. The receiving unit 64 is adapted to receive uplink transmission data, where the uplink transmission data is transmitted through one or more physical units, where each physical unit employs the key feature resource element corresponding to the user that sent the uplink transmission data. The confirming unit 65 is adapted to confirm the user group identification of the uplink transmission data according to the key feature resource elements of the uplink transmission data, and confirm the in-group identification of the user sending the uplink transmission data according to the number of the physical unit transmitting the uplink transmission data. The first further characteristic resource element determining unit 66 is adapted to allocate further characteristic resource elements for different group identities and inform the respective further characteristic resource elements of all the users to be uplink-transmitted, where the further characteristic resource elements are further characteristic elements in the non-orthogonal multiple access characteristic resource than the key characteristic resource element.
For more details of the uplink unlicensed multiple access device, please refer to fig. 1 and fig. 3 and refer to the related description of the uplink unlicensed multiple access method, which is not repeated herein.
Referring to fig. 7, fig. 7 is a schematic structural diagram of another uplink unlicensed-non-orthogonal multiple access apparatus in the embodiment of the present invention. The another uplink unlicensed non-orthogonal multiple access apparatus may include: a second key characteristic resource element determining unit 71, a second physical unit number range determining unit 72, a transmitting unit 73, and a second other characteristic resource element determining unit 74.
Wherein the second key characteristic resource element determining unit 71 is adapted to determine the key characteristic resource elements corresponding to the users according to the indication of the base station, wherein the key characteristic resource elements are selected from the characteristic elements of the non-orthogonal multiple access characteristic resources, the users have group identifiers and intra-group identifiers, and different group identifiers correspond to different key characteristic resource elements. The second physical unit number range determining unit 72 is adapted to determine a physical unit number range corresponding to a user according to the indication of the base station, where different group identifiers in the same group identifier correspond to different physical unit number ranges. The sending unit 73 is adapted to send uplink transmission data using the physical unit number range, where the uplink transmission data is transmitted by one or more physical units, where each physical unit uses the key feature resource element. The second further characteristic resource element determining unit 74 is adapted to determine, according to an indication of a base station, further characteristic resource elements corresponding to users, where the further characteristic resource elements are other than the key characteristic resource element in the non-orthogonal multiple access intervening characteristic resource, where the further characteristic resource elements are allocated according to the group identifier.
For more details of the alternative uplink unlicensed multiple access device, please refer to fig. 4 and fig. 5 and refer to the related description of the uplink unlicensed multiple access method, which is not repeated herein.
The embodiment of the present invention further provides a base station, where the base station includes the uplink unauthorized non-orthogonal multiple access apparatus shown in fig. 6, and the base station may execute the uplink unauthorized non-orthogonal multiple access method.
The embodiment of the present invention further provides a user terminal, where the user terminal includes the uplink unlicensed non-orthogonal multiple access apparatus shown in fig. 7, and the user terminal may execute the uplink unlicensed non-orthogonal multiple access method.
It should be understood by those skilled in the art that the resource pre-configuration of the base station for all users to be uplink-transmitted in one resource pre-configuration interval is only effective in the current resource pre-configuration interval, and when the system transmission requirement changes, the base station may update the resource configuration in the next resource pre-configuration interval. The lengths of the resource pre-configuration intervals may be equal or unequal, and the specific value of the length may be set according to actual system requirements.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer-readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, and the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (30)
1. An uplink unauthorized non-orthogonal multiple access method is characterized by comprising the following steps:
grouping all users to be subjected to uplink transmission to determine a group identifier and an intra-group identifier of each user;
allocating different key characteristic resource elements for different group identifiers, and informing the key characteristic resource elements corresponding to all the users to be subjected to uplink transmission, wherein the key characteristic resource elements are selected from characteristic elements of non-orthogonal multiple access characteristic resources;
allocating different physical unit number ranges for different group identifiers in the same group identifier, and informing the physical unit number ranges corresponding to all the users to be subjected to uplink transmission, wherein the physical units are obtained by dividing non-orthogonal multiple access physical resources;
receiving uplink transmission data, wherein the uplink transmission data are transmitted through one or more physical units, and each physical unit adopts the key characteristic resource elements corresponding to the user sending the uplink transmission data;
confirming the group identification of the user sending the uplink transmission data according to the key characteristic resource elements of the uplink transmission data, and confirming the in-group identification of the user sending the uplink transmission data according to the number of a physical unit transmitting the uplink transmission data;
the physical unit number ranges corresponding to the identifiers in different groups in the same group of identifiers are obtained by dividing physical resources in an orthogonal mode.
2. The uplink unlicensed multiple access method according to claim 1, wherein the non-orthogonal multiple access characteristic resources include one or more of: a codebook, a codeword, a sequence, an interleaver, a mapping method of the interleaver, a demodulation reference signal, a preamble, a space domain resource and a power domain resource.
3. The uplink unauthorized non-orthogonal multiple access method according to claim 2, wherein when the non-orthogonal multiple access characteristic resource includes the demodulation reference signal, the key characteristic resource is the demodulation reference signal.
4. The uplink unlicensed multi-access method as claimed in claim 1, wherein the physical resource orthogonal partitioning modes adopted by different group ids are the same or different.
5. The uplink unlicensed-multiaccess method according to claim 1, characterized in that the physical resource ranges used by different group ids are the same.
6. The uplink unlicensed-non-orthogonal multiple access method according to claim 1, wherein each physical unit employs at least one type of feature resource, and wherein each physical unit contains the complete feature elements of the employed feature resources.
7. The uplink unlicensed multi-access method according to claim 1, further comprising:
allocating other characteristic resource elements to different group identifiers, and informing the other characteristic resource elements of all the users to be subjected to uplink transmission, where the other characteristic resource elements are other characteristic elements except the key characteristic resource element in the non-orthogonal multiple access characteristic resource.
8. An uplink unauthorized non-orthogonal multiple access method is characterized by comprising the following steps:
determining key characteristic resource elements corresponding to users according to the indication of a base station, wherein the key characteristic resource elements are selected from characteristic elements of non-orthogonal multiple access characteristic resources, the users have group identifications and in-group identifications, and different group identifications correspond to different key characteristic resource elements;
determining a physical unit number range corresponding to the user according to the indication of the base station, wherein different group identifiers in the same group identifier correspond to different physical unit number ranges;
sending uplink transmission data by adopting the physical unit number range, wherein the uplink transmission data is transmitted by one or more physical units, and each physical unit adopts the key characteristic resource elements;
the physical unit number ranges corresponding to the identifiers in different groups in the same group of identifiers are obtained by dividing physical resources in an orthogonal mode.
9. The uplink unlicensed multiple access method according to claim 8, wherein the non-orthogonal multiple access characteristic resources include one or more of: a codebook, a codeword, a sequence, an interleaver, a mapping method of the interleaver, a demodulation reference signal, a preamble, a space domain resource and a power domain resource.
10. The uplink unauthorized non-orthogonal multiple access method according to claim 9, wherein when the non-orthogonal multiple access characteristic resource includes the demodulation reference signal, the key characteristic resource is the demodulation reference signal.
11. The uplink unlicensed multi-access method as claimed in claim 8, wherein the physical resource orthogonal partitioning modes used by different group ids are the same or different.
12. The uplink unlicensed-multiaccess method according to claim 8, characterized in that the physical resource ranges used by different group ids are the same.
13. The uplink unlicensed-non-orthogonal multiple access method according to claim 8, wherein each physical unit employs at least one type of feature resource, and wherein each physical unit contains the complete feature elements of the employed feature resources.
14. The uplink unlicensed multi-access method according to claim 8, further comprising:
determining other feature resource elements corresponding to the user according to the indication of the base station, wherein the other feature resource elements are other feature elements except the key feature resource elements in the non-orthogonal multiple access intervening feature resources;
wherein the other characteristic resource elements are allocated according to the group identity.
15. An uplink unlicensed multi-access apparatus, comprising:
the grouping unit is suitable for grouping all users to be subjected to uplink transmission so as to determine the group identifier and the intra-group identifier of each user;
a first key characteristic resource element determining unit, adapted to allocate different key characteristic resource elements to different group identifiers and notify the key characteristic resource elements corresponding to all the users to be uplink-transmitted, wherein the key characteristic resource elements are selected from characteristic elements of non-orthogonal multiple access characteristic resources;
a first physical unit number range determining unit, adapted to allocate different physical unit number ranges to different groups of identifiers in the same group of identifiers, and notify the physical unit number ranges corresponding to all the users to be uplink-transmitted, where the physical units are obtained by dividing non-orthogonal multiple access physical resources;
a receiving unit, adapted to receive uplink transmission data, where the uplink transmission data is transmitted through one or more physical units, and each physical unit employs the key feature resource element corresponding to a user that sent the uplink transmission data;
the confirming unit is suitable for confirming the user group identification of the uplink transmission data according to the key characteristic resource elements of the uplink transmission data and confirming the in-group identification of the user sending the uplink transmission data according to the serial number of the physical unit transmitting the uplink transmission data;
the physical unit number ranges corresponding to the identifiers in different groups in the same group of identifiers are obtained by dividing physical resources in an orthogonal mode.
16. The uplink unlicensed multiple access device according to claim 15, wherein the non-orthogonal multiple access characteristic resources include one or more of: a codebook, a codeword, a sequence, an interleaver, a mapping method of the interleaver, a demodulation reference signal, a preamble, a space domain resource and a power domain resource.
17. The apparatus of claim 16, wherein the key feature resource is the demodulation reference signal when the non-orthogonal multiple access feature resource comprises the demodulation reference signal.
18. The uplink unlicensed multi-access device as claimed in claim 15, wherein the physical resource orthogonal partitioning manners adopted by different group ids are the same or different.
19. The apparatus of claim 15, wherein the physical resource ranges used by different group ids are the same.
20. The apparatus of claim 15, wherein each physical unit employs at least one characteristic resource, and wherein each physical unit contains a complete characteristic element of the employed characteristic resource.
21. The uplink unlicensed multi-access device according to claim 15, further comprising a first other characteristic resource element determining unit, adapted to allocate other characteristic resource elements for different group ids, and notify the other characteristic resource elements of all the users to be uplink-transmitted, where the other characteristic resource elements are other characteristic elements in the non-orthogonal multi-access characteristic resource than the key characteristic resource element.
22. An uplink unlicensed multi-access apparatus, comprising:
a second key characteristic resource element determining unit, adapted to determine a key characteristic resource element corresponding to a user according to an indication of a base station, where the key characteristic resource element is selected from characteristic elements of non-orthogonal multiple access characteristic resources, the user has a group identifier and an intra-group identifier, and different group identifiers correspond to different key characteristic resource elements;
the second physical unit number range determining unit is suitable for determining the physical unit number range corresponding to the user according to the indication of the base station, wherein different group identifications in the same group identification correspond to different physical unit number ranges;
a sending unit, adapted to send uplink transmission data using the physical unit number range, where the uplink transmission data is transmitted by one or more physical units, and each physical unit uses the key feature resource element;
the physical unit number ranges corresponding to the identifiers in different groups in the same group of identifiers are obtained by dividing physical resources in an orthogonal mode.
23. The uplink unlicensed multiple access device as claimed in claim 22, wherein the non-orthogonal multiple access characteristic resources include one or more of: a codebook, a codeword, a sequence, an interleaver, a mapping method of the interleaver, a demodulation reference signal, a preamble, a space domain resource and a power domain resource.
24. The apparatus of claim 23, wherein the key feature resource is the demodulation reference signal when the non-orthogonal multiple access feature resource comprises the demodulation reference signal.
25. The uplink unlicensed multi-access device as claimed in claim 22, wherein the physical resource orthogonal partitioning manners used by different group ids are the same or different.
26. The apparatus of claim 22, wherein the physical resource ranges used by different group ids are the same.
27. The apparatus of claim 22, wherein each physical unit employs at least one characteristic resource, and wherein each physical unit contains a complete characteristic element of the employed characteristic resource.
28. The uplink unlicensed multiple access device according to claim 22, further comprising:
a second other characteristic resource element determining unit, adapted to determine other characteristic resource elements corresponding to the user according to an indication of the base station, where the other characteristic resource elements are other characteristic elements in the non-orthogonal multiple access intervening characteristic resource except the key characteristic resource element;
wherein the other characteristic resource elements are allocated according to the group identity.
29. A base station comprising the uplink unlicensed non-orthogonal multiple access device of any one of claims 15 to 21.
30. A user terminal, characterized in that it comprises the uplink unlicensed non-orthogonal multiple access device according to any of claims 22 to 28.
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| DE112018000166T5 (en) * | 2017-07-14 | 2019-08-01 | Intel IP Corporation | CONFIGURATION OF "GRANTLESS UPLINK" TRANSMISSIONS FOR A USER EQUIPMENT |
| CN109787733B (en) * | 2017-11-14 | 2021-12-24 | 华为技术有限公司 | Communication method and device |
| CN107994935B (en) * | 2017-11-20 | 2020-07-17 | 清华大学 | Sparse code multiple access method, base station, device and system |
| CN109963264B (en) * | 2017-12-23 | 2021-06-04 | 华为技术有限公司 | Data transmission method, communication equipment and network equipment |
| CN110149184B (en) * | 2018-02-13 | 2021-11-23 | 北京紫光展锐通信技术有限公司 | Method for indicating characteristic resource of non-orthogonal multiple access, user terminal, base station and medium |
| US10820342B2 (en) * | 2018-02-13 | 2020-10-27 | Mediatek Singapore Pte. Ltd. | Method and apparatus for flexible scheduling of uplink transmissions in mobile communications |
| CN110708764B (en) * | 2018-07-09 | 2022-01-25 | 维沃移动通信有限公司 | Information transmission method, network equipment and terminal |
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| US10149318B2 (en) * | 2014-09-02 | 2018-12-04 | Qualcomm Incorporated | Techniques for transmitting and receiving downlink control information for a set of NOMA downlink transmissions |
| CN105721123B (en) * | 2014-12-03 | 2019-04-09 | 电信科学技术研究院 | A kind of user pairing and power distribution method and device |
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