CN108462564B - Control channel resource allocation and wireless communication signal transmission method and device - Google Patents
Control channel resource allocation and wireless communication signal transmission method and device Download PDFInfo
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- CN108462564B CN108462564B CN201710087312.4A CN201710087312A CN108462564B CN 108462564 B CN108462564 B CN 108462564B CN 201710087312 A CN201710087312 A CN 201710087312A CN 108462564 B CN108462564 B CN 108462564B
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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
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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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
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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
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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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
- H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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Abstract
The invention relates to a control channel resource allocation method and device and a wireless communication signal transmitting method and device, comprising the following steps: the method comprises the steps of dividing downlink broadcast beams to obtain at least two downlink broadcast sub-beams, respectively establishing the same virtual Control Channel Element (CCE) resource space for each downlink broadcast sub-beam, distributing the corresponding downlink broadcast sub-beams for a user terminal according to the beam position information of the user terminal in the downlink broadcast beams, respectively carrying out channel coding on original downlink control information corresponding to the user terminal positioned in the same downlink broadcast sub-beam to obtain corresponding current downlink control information, distributing target CCE resources for the current downlink control information from the virtual CCE resource space according to the polymerization degree corresponding to the user terminal, the corresponding scheduling sequence and the corresponding downlink broadcast sub-beams, increasing the Physical Downlink Control Channel (PDCCH) capacity, and reducing the resource conflict probability corresponding to the user terminal.
Description
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a method and an apparatus for allocating control channel resources and a corresponding method and an apparatus for transmitting wireless communication signals.
Background
In a Long Term Evolution (LTE) system, a Physical Downlink Control Channel (PDCCH) is used to carry uplink and Downlink Control information technologies, including resource scheduling assignment and other Control information.
Since each PDCCH is transmitted on L consecutive CCEs (Control Channel elements) in the LTE system, the starting position index of the CCEs must be an integer multiple of L, and this design makes the capacity of the PDCCH limited. With the introduction of multiple antennas in an LTE system, the overall capacity of the current LTE system is integrally increased, so that the number of users of a PDCCH that needs to be transmitted in a subframe is greatly increased, and the PDCCH capacity of the current system cannot meet the increasing demand, which results in a significant increase in the probability of resource collision corresponding to a User Equipment (UE).
Disclosure of Invention
Accordingly, in order to solve the above problems, it is necessary to provide a method and an apparatus for allocating control channel resources, which can significantly improve the capacity of a PDCCH in an LTE system and reduce the probability of resource collision corresponding to a user terminal.
A method of control channel resource allocation, the method comprising:
dividing downlink broadcast beams to obtain at least two corresponding downlink broadcast sub-beams, and respectively establishing the same virtual Control Channel Element (CCE) resource space for each downlink broadcast sub-beam;
distributing the corresponding downlink broadcast sub-beam for the user terminal according to the beam position information of the user terminal in the downlink broadcast beam;
performing channel coding on original downlink control information corresponding to the user terminal located in the same downlink broadcast sub-beam to obtain current downlink control information corresponding to the user terminal;
and distributing target CCE resources for the current downlink control information corresponding to the user terminal from the virtual CCE resource space according to the polymerization degree corresponding to the user terminal, the corresponding scheduling sequence and the corresponding downlink broadcast sub-beam.
A method for transmitting a wireless communication signal, comprising the above method for allocating control channel resources, the method for transmitting a wireless communication signal further comprising:
multiplexing the current downlink control information positioned in the same downlink broadcast sub-beam according to the target CCE resource distributed by the current downlink control information to generate current multiplexing information;
and respectively carrying out channel processing on the current multiplexing information corresponding to each broadcasting sub-beam, generating orthogonal frequency division multiplexing symbols together, and transmitting in a space division mode.
An apparatus for control channel resource allocation, the apparatus comprising:
the device comprises a beam dividing and resource space establishing module, a Control Channel Element (CCE) resource space establishing module and a Control Channel Element (CCE) resource space establishing module, wherein the beam dividing and resource space establishing module is used for dividing downlink broadcast beams to obtain at least two corresponding downlink broadcast sub-beams and respectively establishing the same CCE resource space for each downlink broadcast sub-beam;
a beam allocation module, configured to allocate, according to beam location information of a user terminal in the downlink broadcast beam, the corresponding downlink broadcast sub-beam to the user terminal;
a current downlink control information generating module, configured to perform channel coding on original downlink control information corresponding to the user terminal located in the same downlink broadcast sub-beam, respectively, to obtain current downlink control information corresponding to the user terminal;
and the control channel resource allocation module is used for allocating target CCE resources for the current downlink control information corresponding to the user terminal from the virtual CCE resource space according to the corresponding polymerization degree, the corresponding scheduling sequence and the corresponding downlink broadcast sub-beam of the user terminal.
A wireless communication signal transmitting apparatus comprising the control channel resource allocation apparatus, the wireless communication signal transmitting apparatus further comprising:
a current multiplexing information obtaining module, configured to multiplex current downlink control information located in the same downlink broadcast sub-beam according to a target CCE resource allocated by the current downlink control information, and generate current multiplexing information;
and the signal transmitting module is used for respectively carrying out channel processing on the current multiplexing information corresponding to each broadcasting sub-beam, generating orthogonal frequency division multiplexing symbols together and transmitting the orthogonal frequency division multiplexing symbols in a space division mode.
The above-described control channel resource method and apparatus and corresponding wireless communication signal transmission method and apparatus, dividing the downlink broadcast wave beam to obtain at least two corresponding downlink broadcast sub-wave beams, respectively establishing the same virtual Control Channel Element (CCE) resource space aiming at each downlink broadcast sub-wave beam, allocating corresponding downlink broadcast sub-beams to the user terminal according to the beam position information of the user terminal in the downlink broadcast beams, performing channel coding on the original downlink control information corresponding to the user terminal in the same downlink broadcast sub-beam to obtain the current downlink control information corresponding to the user terminal, and distributing target CCE resources for the current downlink control information corresponding to the user terminal from the virtual CCE resource space according to the polymerization degree corresponding to the user terminal, the corresponding scheduling sequence and the corresponding downlink broadcast sub-beam. When the downlink broadcast beam is divided into a plurality of downlink broadcast sub-beams in a space division manner, the user terminals located in the same downlink broadcast sub-beam are still in the same CCE resource space, but the user terminals located in different broadcast sub-beams are in a space division relationship, the same CCE resources can be used in the corresponding virtual CCE resource spaces, and through the processing, the CCE resources in the PDCCH capacity of the physical downlink control channel are multiplied, so that the PDCCH capacity is greatly increased, and the probability of resource conflict of the user terminals is reduced.
Drawings
FIG. 1 is a diagram of an exemplary application environment for a method for controlling channel resource allocation;
FIG. 2 is a flow chart of a method for allocating control channel resources;
fig. 3 is a flowchart illustrating a method for allocating corresponding downlink broadcast sub-beams to a ue according to an embodiment;
FIG. 4 is a schematic diagram of beam splitting in one embodiment;
fig. 5 is a flowchart of a method for allocating target CCE resources to current downlink control information corresponding to a user equipment in an embodiment;
fig. 6 is a schematic diagram illustrating a distribution of beam position information where a UE is located in one embodiment;
fig. 7 is a diagram illustrating a target CCE resource allocation result according to an embodiment;
FIG. 8 is a flow diagram of a method for transmitting a wireless communication signal in one embodiment;
FIG. 9 is a flow diagram of a method for transmitting a wireless communication signal according to one embodiment;
FIG. 10 is a block diagram of an apparatus for allocating control channel resources according to an embodiment;
FIG. 11 is a block diagram of a beam allocation module in one embodiment;
FIG. 12 is a block diagram of a control channel resource allocation module in one embodiment;
fig. 13 is a block diagram of a wireless communication signal transmitting apparatus.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 1 is an application environment diagram of a method for controlling Channel resource allocation in an embodiment, where a Downlink signal exists in a Long Term Evolution system LTE (Long Term Evolution, LTE), and is transmitted from a base station 110 to a User Equipment UE (User Equipment, UE), before the Downlink signal is transmitted, that is, in a process of processing a base station signal, Downlink Control Information DCI (DCI) corresponding to each User terminal needs to be transmitted through a Physical Downlink Control Channel (PDCCH), and a basic constituent unit of the PDCCH is a Control Channel Element (CCE), where the Control Channel resource specifically refers to a CCE resource.
In one embodiment, a control channel resource allocation method is provided, as shown in fig. 2, including:
step S210, dividing the downlink broadcast beam to obtain at least two corresponding downlink broadcast sub-beams, and respectively establishing the same virtual CCE resource space for each downlink broadcast sub-beam.
Specifically, according to the coverage area of the downlink broadcast beam, the downlink broadcast beam is subjected to space division, that is, the downlink broadcast beam is divided into at least two downlink broadcast sub-beams, and assuming that the downlink broadcast sub-beam is numbered "S1, S2, and Si … Sm", where m is greater than or equal to 2, and then the same virtual CCE resource spaces are respectively established in the physical downlink control channel PDCCH for each downlink broadcast sub-beam Si.
Step S220, according to the beam position information of the ue in the downlink broadcast beam, allocates a corresponding downlink broadcast sub-beam to the ue.
Specifically, the positions of different user terminals in the downlink broadcast sub-beams are different, and since the downlink broadcast beam is divided into a plurality of sub-beams, it is first necessary to allocate corresponding downlink broadcast sub-beams to the user terminals according to the beam position information of the user terminals.
Step S230, channel coding is performed on the original downlink control information corresponding to the user terminal located in the same downlink broadcast sub-beam, so as to obtain the current downlink control information corresponding to the user terminal.
Specifically, one downlink broadcast sub-beam may correspond to a plurality of user terminals, each user terminal receives corresponding downlink control information, the downlink control information is transmitted on the PDCCH, and the channel coding is performed on the original DCI information corresponding to all the user terminals located in the same downlink broadcast sub-beam, so as to obtain the current downlink control information corresponding to the user terminal, that is, the current DCI information.
Step S240, according to the aggregation level corresponding to the ue, the corresponding scheduling order, and the corresponding downlink broadcast sub-beam, allocating a target CCE resource to the current downlink control information corresponding to the ue from the virtual CCE resource space.
Specifically, according to the LTE protocol, the aggregation level and the corresponding scheduling order information corresponding to the ue may be obtained, and the scheduling order of each ue may be obtained through the PDCCH, which are all factors that must be considered for allocating the CCE resource to the current DCI information, for example, if the aggregation level corresponding to the ue is not considered, extra overhead of the CCE resource may be caused, if the initial position information of the CCE is not considered, the subsequent signal may not be demodulated, and in addition, the scheduling order and the corresponding downlink broadcast sub-beam corresponding to the ue must be considered, because the downlink broadcast sub-beam corresponds to the virtual CCE resource space, and the corresponding relationship between the ue and the downlink broadcast sub-beam is naturally considered when the CCE resource is allocated to the ue.
The method for controlling the channel resources comprises the steps of dividing downlink broadcast beams to obtain at least two corresponding downlink broadcast sub-beams, respectively establishing the same virtual CCE resource space for each downlink broadcast sub-beam, distributing the corresponding downlink broadcast sub-beams for the user terminal according to the beam position information of the user terminal in the downlink broadcast beams, respectively carrying out channel coding on the original downlink control information corresponding to the user terminal positioned in the same downlink broadcast sub-beam to obtain the current downlink control information corresponding to the user terminal, and distributing target CCE resources for the current downlink control information corresponding to the user terminal from the virtual CCE resource space according to the polymerization degree corresponding to the user terminal, the corresponding scheduling sequence and the corresponding downlink broadcast sub-beams. When the downlink broadcast beam is divided into a plurality of downlink broadcast sub-beams in a space division manner, the user terminals located in the same downlink broadcast sub-beam are still in the same CCE resource space, but the user terminals located in different broadcast sub-beams are in a space division relationship, the same CCE resources can be used in the corresponding virtual CCE resource spaces, and through the processing, the CCE resources in the PDCCH capacity of the physical downlink control channel are multiplied, so that the PDCCH capacity is greatly increased, and the probability of resource conflict of the user terminals is reduced.
In one embodiment, as shown in fig. 3, step S220 includes:
step S222 is to determine whether the ue is located in a beam boundary area between any two adjacent first downlink broadcast sub-beams and second downlink broadcast sub-beams according to the beam location information of the ue in the downlink broadcast beams.
In particular, in one embodiment, the downlink broadcast beam is divided into a plurality of downlink broadcast sub-beams, according to the characteristics of the wave beams, each downlink broadcast sub-wave beam respectively has a corresponding main lobe, a side lobe and an out-of-band mixed lobe, this makes it possible for a partial overlap region to exist between two adjacent downlink broadcast sub-beams, and obviously, a part of the user terminals may exist in a beam junction region between any adjacent first downlink broadcast sub-beam and second downlink broadcast sub-beam, and there is beam interference when the user terminal receives the corresponding downlink signal, therefore, the user terminal located in the beam junction area and the user terminal located in the non-beam junction area have different corresponding relationships with the downlink broadcast sub-beams, and at this time, it is necessary to determine whether the user terminal is located in the beam junction area between any two adjacent first downlink broadcast sub-beams and second downlink broadcast sub-beams.
In one embodiment, as shown in the beam splitting diagram shown in fig. 4, the coverage area of the downlink broadcast beam is [ -60 °, 60 ° ], the downlink broadcast sub-beam is split into two downlink broadcast sub-beams, i.e. a first downlink broadcast sub-beam (abbreviated as sub-beam 1) and a second downlink broadcast sub-beam (abbreviated as sub-beam 2), the coverage area of the sub-beam 1 is [ -60 °, 5 ° ], the coverage area of the sub-beam 2 is [ -5 °, 60 ° ], theoretically, the beam interface area is [ -5 °, 5 ° ], in practical engineering applications, to further eliminate interference between two adjacent sub-beams, the beam interface area is usually [ -10 °, 10 ° ], when allocating a corresponding downlink broadcast sub-beam to a user terminal, it is necessary to first determine whether the user terminal is located in the beam interface area [ -10 °, 10 ° ].
In step S224, if yes, the ue corresponds to the first downlink broadcast sub-beam and the second downlink broadcast sub-beam respectively.
Specifically, each downlink broadcast sub-beam corresponds to an independent virtual CCE resource space, and when the user terminal is located in a beam junction region between any two adjacent first downlink broadcast sub-beams and second downlink broadcast sub-beams, the user terminal respectively needs to correspond to the first broadcast sub-beam and the second broadcast sub-beam, that is, CCE resources are allocated to the user terminal in the virtual CCE resource space corresponding to the first downlink broadcast sub-beam and the virtual CCE resource space corresponding to the second downlink broadcast sub-beam at the same time. If only the first downlink broadcast sub-beam or the second downlink broadcast sub-beam is allocated to the ue, the ue will be strongly interfered by the downlink signal of the second downlink broadcast sub-beam when receiving the downlink signal corresponding to the first downlink broadcast sub-beam, so that if the ue is located in a beam boundary region between any two adjacent first downlink broadcast sub-beams and second downlink broadcast sub-beams, the first downlink broadcast sub-beam and the second downlink broadcast sub-beam are allocated to the ue at the same time, that is, the first downlink broadcast sub-beam and the second downlink broadcast sub-beam correspond to the ue.
In one embodiment, as shown in the beam division diagram of fig. 4, when a user terminal is located in a beam boundary region [ -10 °, 10 ° ], the user terminal is allocated with corresponding sub-beam 1 and sub-beam 2 at the same time, that is, the user terminal is allocated with a target CCE resource in a virtual CCE resource space corresponding to the sub-beam 1 and a virtual CCE resource space corresponding to the sub-beam 2 at the same time.
In step S226, if not, the downlink broadcast sub-beam corresponding to the beam position information is allocated to the ue.
Specifically, when the user terminal is not in a beam junction area between any two adjacent first downlink broadcast sub-beams and second downlink broadcast sub-beams, the downlink broadcast sub-beam corresponding to the actual beam position information where the user terminal is located is allocated to the user terminal.
In an embodiment, as shown in the beam division diagram shown in fig. 4, when the ue is not located in the beam boundary region [ -10 °, 10 ° ] then, a downlink broadcast sub-beam is further allocated to the ue according to the specific beam position information of the ue, for example, when the ue is located in [ -60 °, -10 °), a sub-beam 1 is allocated to the ue, that is, a target CCE resource is allocated to the ue in the virtual CCE resource space corresponding to the sub-beam 1, and when the ue is located in (10 °, 60 °), a sub-beam 2 is allocated to the ue, that is, a target CCE resource is allocated to the ue in the virtual CCE resource space corresponding to the sub-beam 2.
In one embodiment, as shown in fig. 5, step S240 includes:
step S242, determining a first allocation sequence corresponding to the ue according to the number of downlink broadcast sub-beams corresponding to the ue.
Specifically, the number of downlink broadcast sub-beams corresponding to the user terminal may be two, that is, when the user terminal is located in a beam junction area between any two adjacent first downlink broadcast sub-beams and second downlink broadcast sub-beams; the number of downlink broadcast sub-beams corresponding to the user terminal may also be only one, that is, when the user terminal is a non-beam-boundary user. The number of downlink broadcast sub-beams corresponding to different user terminals is different, and the sequence corresponding to each user terminal is determined according to the number of downlink broadcast sub-beams corresponding to each user terminal to obtain a first distribution sequence.
Step S244, if there are first same-sequence ues in the same sequence in the first allocation sequence, determining whether the number of downlink broadcast sub-beams corresponding to the ue is two, if yes, going to step S244 a; if not, the process proceeds to step S244 b.
Step S244a, determining the scheduling order corresponding to the first peer user terminal as the second allocation order corresponding to the first peer user terminal.
Specifically, when the number of downlink broadcast sub-beams corresponding to the first in-sequence user terminal is two, the second allocation sequence corresponding to the first in-sequence user terminal is determined according to the scheduling sequence corresponding to the first in-sequence user terminal without considering the size of the aggregation degree, and the target CCE resources are directly allocated from the virtual CCE resource space to the current downlink control information corresponding to the first in-sequence user terminal whose number of corresponding downlink broadcast sub-beams is two, respectively, according to the second allocation sequence.
Step S244b, determining a third allocation order corresponding to the first ordering user terminal according to the aggregation level corresponding to the first ordering user terminal.
Specifically, in the first allocation sequence, there may be user terminals in the same sequence, which are referred to as first in-sequence user terminals, and at this time, it is further necessary to further determine whether the number of downlink broadcast sub-beams corresponding to each first in-sequence user terminal is two, and if not, the first in-sequence user terminals need to be sorted again with reference to the aggregation level of each first in-sequence user terminal, so as to obtain a third allocation sequence corresponding to the first in-sequence user terminal.
In step S246, if there is a second same-sequence ue in the same sequence in the third allocation sequence, the fourth allocation sequence corresponding to the second same-sequence ue is determined according to the scheduling sequence corresponding to the second same-sequence ue.
Specifically, in the third allocation sequence, there may be user terminals in the same sequence, which are referred to as second identical-sequence user terminals, and at this time, the second identical-sequence user terminals need to be sorted again by referring to CCE starting position information of each second identical-sequence user terminal, so as to obtain a fourth allocation sequence corresponding to the second identical-sequence user terminals.
Step S248, according to the first allocation sequence, the second allocation sequence, the third allocation sequence and the fourth allocation sequence, allocating target CCE resources to the current downlink control information corresponding to the ue from the virtual CCE resource space.
Specifically, a comprehensive allocation sequence corresponding to all the user terminals is obtained according to the first allocation sequence, the second allocation sequence, the third allocation sequence and the fourth allocation sequence, and target CCE resources are allocated to current downlink control information corresponding to all the user terminals from the virtual CCE resource space according to the comprehensive allocation sequence.
In one embodiment, step S242 includes: and sequencing the user terminals according to the sequence of the number of the downlink broadcast sub-beams corresponding to the user terminals from large to small to obtain a first distribution sequence corresponding to the user terminals.
Specifically, the number of downlink broadcast sub-beams corresponding to the user terminal may be two, that is, the user terminal is located in a beam junction area between any two adjacent first downlink broadcast sub-beams and second downlink broadcast sub-beams; the number of downlink broadcast sub-beams corresponding to the user terminal may also be only one, that is, when the user terminal is a non-beam junction user, all the user terminals are respectively sorted according to the descending broadcast sub-beams from large to small, so as to obtain a first distribution order corresponding to the user terminal, that is, the distribution order of the user terminal whose beam position is located at the beam junction is higher in priority than the user terminal whose beam position is located at the non-beam junction region.
In one embodiment, the step of determining the third allocation order corresponding to the first ordering user terminal according to the aggregation level corresponding to the first ordering user terminal in step S244b includes: and sequencing the first same-sequence user terminals according to the sequence of the polymerization degrees corresponding to the first same-sequence user terminals from large to small to obtain a third distribution sequence corresponding to the first same-sequence user terminals.
Specifically, when the number of downlink broadcast sub-beams corresponding to the user terminal is two or one, the user terminal is called a first in-sequence user terminal, and when the number of downlink broadcast sub-beams corresponding to the user terminal is single, the first in-sequence user terminal needs to be sequenced according to the sequence of the degree of polymerization corresponding to the user terminal from large to small, so as to obtain a third distribution sequence.
In one embodiment, step S246 includes: and if the third distribution sequence has a second same-sequence user terminal in the same sequence, obtaining a fourth distribution sequence corresponding to the second same-sequence user terminal according to the scheduling sequence corresponding to the second same-sequence user terminal.
Specifically, when the number of downlink broadcast sub-beams corresponding to the ue is single and the corresponding aggregation degrees are all the same, the ue is referred to as a second in-sequence ue, and at this time, a fourth allocation sequence corresponding to the second in-sequence ue is obtained by referring to a scheduling sequence corresponding to each ue.
In an embodiment, according to the beam splitting diagram shown in fig. 4, the downlink broadcast sub-beam is split into a first downlink broadcast sub-beam (referred to as sub-beam 1) and a second downlink broadcast sub-beam (referred to as sub-beam 2), and the sub-beam corresponding to the ue is selected according to the location information of the ue in the beam. A user terminal located in the beam range [ -60 °, -10 °) selects sub-beam 1; a user terminal located in the beam range (10 deg., 60 deg.) selects sub-beam 2, a user terminal located in the beam intersection area range-10 deg., selects both sub-beam 1 and sub-beam 2.
Two identical virtual CCE resource spaces are established, corresponding to sub-beam 1 and sub-beam 2, respectively. The two sub-beams are independently allocated with resources. In order to ensure that a user terminal in a beam junction area range of (-10) - (+) can allocate target CCE resources at the same position in two sub-beams, when resources are allocated, the user terminal corresponding to two downlink broadcast sub-beams, namely the user terminal in the beam junction area range of (-10) - (+), 10) - (+) is allocated first, and then the user terminal corresponding to one downlink broadcast sub-beam, namely the user terminal in a non-beam junction area, is allocated to obtain a first allocation sequence; in the first allocation sequence, first same-sequence user terminals in the same sequence may appear, and at this time, when CCE resource allocation is performed, it is further necessary to determine whether the number of downlink broadcast sub-beams corresponding to the first same-sequence user terminals is single, if yes, to further improve CCE resource utilization, the first same-sequence user terminals are ordered according to the aggregation degree from large to small, and user terminals with large aggregation degree are allocated first to reallocate user terminals with small aggregation degree, so as to obtain a third allocation sequence; if not, directly taking the scheduling sequence corresponding to the first same-order user terminal as a second allocation sequence without considering the size of the polymerization degree, and respectively allocating target CCE resources for the current downlink control information respectively corresponding to the first same-order user terminal from the virtual CCE resource space according to the second allocation sequence; and a second same-sequence user terminal in the same sequence may appear in the third allocation sequence, a fourth allocation sequence is obtained according to the scheduling sequence corresponding to the second same-sequence user terminal, and the target CCE resources are respectively allocated to the current downlink control information respectively corresponding to all the user terminals in the downlink broadcast beam range from the virtual CCE resource space by integrating the first allocation sequence, the second allocation sequence, the third allocation sequence and the fourth allocation sequence.
In an embodiment, on the basis shown in fig. 4, it is specified that the number of user terminals UE in the downlink broadcast beam range is 10, a beam position information distribution diagram where the user terminals UE are located is shown in fig. 6, the corresponding relationship between the user terminals UE and the downlink broadcast sub-beams obtained according to fig. 6, the total number of the established CCE resources is 30, which is numbered CCE0-CCE29, and the scheduling order of each user terminal UE, the corresponding relationship with the downlink broadcast sub-beams, the corresponding aggregation level, and the starting position information of the CCE resources are shown in table 1.
TABLE 1
The scheduling order information in table 1 is obtained through PDCCH, and is sent by the base station through PDCCH, according to the control channel resource allocation method, the beam boundary region [ -10 °, 10 ° ] user terminals, including UE3, UE8, and UE5, which are first picked out are directly obtained according to the scheduling order in table 1 as UE3, UE5, and UE8, then target CCE resources are allocated to current downlink control information corresponding to UE3, UE5, and UE8 in order from the virtual CCE resource space corresponding to sub-beam 1, and target CCE resources are allocated to current downlink control information corresponding to UE3, UE5, and UE8 in order from the virtual CCE resource space corresponding to sub-beam 2. Since the virtual resource spaces corresponding to the sub-beam 1 and the sub-beam 2 are completely the same, the target CCE resources allocated to the current downlink control information corresponding to the UE3, the UE5, and the UE8 are also the same.
And then, sorting other UEs in the sub-beam 1 from large to small according to the polymerization degree L, wherein the sorted order is as follows: UE7, UE6, UE9, and UE10, where the degrees of polymerization of UE9 and UE10 are the same, and they are sorted according to the scheduling order in table 1, and the target CCE resources are allocated to respective user terminals in the virtual CCE resource space corresponding to sub-beam 1 according to the order of UE7, UE6, UE9, and UE10, and finally, other UEs in sub-beam 2 are sorted from large to small according to the degree of polymerization L, and the sorted order is: the UE4/UE2/UE1 allocate target CCE resources to the respective user terminals in the virtual CCE resource space corresponding to the sub-beam 2 in this order, and the result of allocating the entire target CCE resources is shown in fig. 7.
It should be noted that, if the CCE resource corresponding to the CCE starting position information is occupied, the CCE resources that are idle are sequentially found and allocated according to the sequence of the CCE resources from front to back.
As shown in fig. 8, there is also provided a wireless communication signal transmission method, which includes the control channel resource allocation method, and further includes:
step S250, multiplexing the current downlink control information located in the same downlink broadcast sub-beam according to the target CCE resource allocated by the current downlink control information, and generating current multiplexing information.
Step S260, respectively performing channel processing on the current multiplexing information corresponding to each broadcast sub-beam, jointly generating an orthogonal frequency division multiplexing symbol, and transmitting the orthogonal frequency division multiplexing symbol in a space division manner.
In one embodiment, step S250 further comprises: and respectively scrambling, modulating, layer mapping and precoding the current multiplexing information corresponding to each broadcasting sub-beam, multiplying the current multiplexing information by the broadcasting weight of the downlink broadcasting sub-beam corresponding to the current multiplexing information, mapping resources, generating orthogonal frequency division multiplexing symbols together, and transmitting in a space division mode.
As shown in fig. 9, a flowchart of a wireless communication signal transmitting method is provided, where there are m downlink broadcast sub-beams, and each downlink broadcast sub-beam includes n original downlink control information.
As shown in fig. 10, there is provided a control channel resource allocation apparatus, including:
the beam dividing and resource space establishing module 310 is configured to divide a downlink broadcast beam to obtain at least two corresponding downlink broadcast sub-beams, and respectively establish the same virtual CCE resource space for each downlink broadcast sub-beam.
The beam allocating module 320 is configured to allocate a corresponding downlink broadcast sub-beam to the user terminal according to the beam location information of the user terminal in the downlink broadcast beam.
The current downlink control information generating module 330 is configured to perform channel coding on the original downlink control information corresponding to the user terminal located in the same downlink broadcast sub-beam, respectively, to obtain current downlink control information corresponding to the user terminal.
And a control channel resource allocation module 340, configured to allocate, according to the aggregation level corresponding to the user terminal, the corresponding scheduling order, and the corresponding downlink broadcast sub-beam, a target CCE resource for the current downlink control information corresponding to the user terminal from the virtual CCE resource space.
In one embodiment, as shown in fig. 11, the beam allocation module 320 includes:
a first determining subunit 322, configured to determine, according to beam position information of the ue in the downlink broadcast beam, whether the ue is located in a beam boundary area between any two adjacent first downlink broadcast sub-beams and a second downlink broadcast sub-beam, if yes, the ue enters the first processing subunit 324, and if not, the second processing subunit 326.
The first processing subunit 324 is configured to enable the ue to respectively correspond to the first downlink broadcast sub-beam and the second downlink broadcast sub-beam.
The second processing subunit 326 is configured to allocate a downlink broadcast sub-beam corresponding to the beam position information to the ue.
In one embodiment, as shown in fig. 12, the control channel resource allocation module 340 includes:
the first allocation order obtaining subunit 342 is configured to determine a first allocation order corresponding to the user equipment according to the downlink broadcast sub-beam corresponding to the user equipment.
A second determining subunit 344, configured to determine whether the number of the downlink broadcast sub-beams corresponding to a first in-sequence user terminal is two if the first in-sequence user terminals in the same sequence exist in the first allocation sequence.
A second allocation sequence obtaining sub-unit 344a, configured to determine, if yes, a second allocation sequence corresponding to the first peer user terminal according to the scheduling sequence corresponding to the first peer user terminal.
A third allocation order obtaining subunit 344b, configured to determine, if the first allocation order is not the same as the second allocation order, a third allocation order corresponding to the first in-sequence user terminal according to the aggregation level corresponding to the first in-sequence user terminal.
A fourth distribution order obtaining subunit 346, configured to, if there are second same-order user terminals in the same order in the third distribution order, determine a fourth distribution order corresponding to the second same-order user terminal according to a scheduling order corresponding to the second same-order user terminal.
A control channel resource allocation subunit 348, configured to allocate, according to the first allocation order, the second allocation order, the third allocation order, and the fourth allocation order, a target CCE resource for the current downlink control information corresponding to the user terminal from the virtual CCE resource space.
In an embodiment, the first allocation order obtaining subunit 342 is further configured to sort, according to an order from a large number to a small number of downlink broadcast sub-beams corresponding to the user terminal, the user terminals to obtain a first allocation order corresponding to the user terminal.
In an embodiment, the third allocation order obtaining subunit 344b is further configured to, if there are second same-order user terminals in the same order in the third allocation order, sort the second same-order user terminals according to a scheduling order corresponding to the second same-order user terminals, so as to obtain a fourth allocation order corresponding to the second same-order user terminals.
In addition, as shown in fig. 13, there is also provided a wireless communication signal transmitting apparatus, including the control channel resource allocation apparatus, the wireless communication signal transmitting apparatus further including:
a current multiplexing information obtaining module 350, configured to multiplex current downlink control information located in the same downlink broadcast sub-beam according to a target CCE resource allocated by the current downlink control information, and generate current multiplexing information;
the signal processing and transmitting module 360 is configured to perform channel processing on the current multiplexing information corresponding to each broadcast sub-beam, generate an orthogonal frequency division multiplexing symbol together, and transmit the orthogonal frequency division multiplexing symbol in a space division manner.
In an embodiment, the signal processing and transmitting module 360 is further configured to perform scrambling, modulation, layer mapping, and precoding processing on the current multiplexing information corresponding to each broadcast sub-beam, multiply the current multiplexing information by the broadcast weight of the downlink broadcast sub-beam corresponding to the current multiplexing information, perform resource mapping, generate an orthogonal frequency division multiplexing symbol together, and transmit the orthogonal frequency division multiplexing symbol in a space division manner.
It will be understood by those skilled in the art that all or part of the processes in the methods of the embodiments described above may be implemented by hardware related to instructions of a computer program, which may be stored in a computer readable storage medium, for example, in the storage medium of a computer system, and executed by at least one processor in the computer system, so as to implement the processes of the embodiments including the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (14)
1. A method of control channel resource allocation, the method comprising:
dividing downlink broadcast beams to obtain at least two corresponding downlink broadcast sub-beams, and respectively establishing the same virtual Control Channel Element (CCE) resource space for each downlink broadcast sub-beam;
distributing the corresponding downlink broadcast sub-beam for the user terminal according to the beam position information of the user terminal in the downlink broadcast beam;
performing channel coding on original downlink control information corresponding to the user terminal located in the same downlink broadcast sub-beam to obtain current downlink control information corresponding to the user terminal;
and distributing target CCE resources for the current downlink control information corresponding to the user terminal from the virtual CCE resource space according to the polymerization degree corresponding to the user terminal, the corresponding scheduling sequence and the corresponding downlink broadcast sub-beam.
2. The method of claim 1, wherein the step of allocating the corresponding downlink broadcast sub-beam to the user terminal according to the beam location information of the user terminal in the downlink broadcast beam comprises:
judging whether the user terminal is located in a beam junction area between any two adjacent first downlink broadcast sub-beams and second downlink broadcast sub-beams or not according to the beam position information of the user terminal in the downlink broadcast beams, if so, the user terminal respectively corresponds to the first downlink broadcast sub-beams and the second downlink broadcast sub-beams; and if not, distributing the downlink broadcast sub-beam corresponding to the beam position information for the user terminal.
3. The method according to claim 1, wherein the step of allocating target CCE resources for the current downlink control information corresponding to the ue from the virtual CCE resource space according to the aggregation level corresponding to the ue, the corresponding scheduling order, and the corresponding downlink broadcast sub-beam comprises:
determining a first allocation sequence corresponding to the user terminal according to the number of the downlink broadcast sub-beams corresponding to the user terminal;
if the first distribution sequence has a first same-sequence user terminal in the same sequence, judging whether the number of the downlink broadcast sub-beams corresponding to the first same-sequence user terminal is two; if so, determining a second allocation sequence corresponding to the first in-sequence user terminal according to the scheduling sequence corresponding to the first in-sequence user terminal; if not, determining a third distribution sequence corresponding to the first same-sequence user terminal according to the polymerization degree corresponding to the first same-sequence user terminal;
if a second same-sequence user terminal in the same sequence exists in the third distribution sequence, determining a fourth distribution sequence corresponding to the second same-sequence user terminal according to a scheduling sequence corresponding to the second same-sequence user terminal;
and allocating target CCE resources for the current downlink control information corresponding to the user terminal from the virtual CCE resource space according to the first allocation sequence, the second allocation sequence, the third allocation sequence and the fourth allocation sequence.
4. The method according to claim 3, wherein the step of determining a first allocation order corresponding to the ue according to the downlink broadcast sub-beam corresponding to the ue comprises:
and sequencing the user terminals according to the sequence of the number of the downlink broadcast sub-beams corresponding to the user terminals from large to small to obtain a first distribution sequence corresponding to the user terminals.
5. The method according to claim 3, wherein the step of determining the third allocation order corresponding to the first in-sequence user terminal according to the aggregation level corresponding to the first in-sequence user terminal comprises:
and sequencing the first same-sequence user terminals according to the sequence of the polymerization degrees corresponding to the first same-sequence user terminals from large to small to obtain a third distribution sequence corresponding to the first same-sequence user terminals.
6. A method of transmitting wireless communication signals including the method of control channel resource allocation of any of claims 1-5, the method further comprising:
multiplexing the current downlink control information positioned in the same downlink broadcast sub-beam according to the target CCE resource distributed by the current downlink control information to generate current multiplexing information;
and respectively carrying out channel processing on the current multiplexing information corresponding to each broadcasting sub-beam, generating orthogonal frequency division multiplexing symbols together, and transmitting in a space division mode.
7. The method according to claim 6, wherein the step of performing channel processing on the current multiplexing information corresponding to each of the broadcast sub-beams respectively, generating orthogonal frequency division multiplexing symbols together, and transmitting the orthogonal frequency division multiplexing symbols in a space division manner comprises:
and respectively scrambling, modulating, layer mapping and precoding the current multiplexing information corresponding to each broadcasting sub-beam, multiplying the current multiplexing information by the broadcasting weight of the downlink broadcasting sub-beam corresponding to the current multiplexing information and performing resource mapping to jointly generate an orthogonal frequency division multiplexing symbol, and transmitting the orthogonal frequency division multiplexing symbol in a space division mode.
8. An apparatus for control channel resource allocation, the apparatus comprising:
the device comprises a beam dividing and resource space establishing module, a Control Channel Element (CCE) resource space establishing module and a Control Channel Element (CCE) resource space establishing module, wherein the beam dividing and resource space establishing module is used for dividing downlink broadcast beams to obtain at least two corresponding downlink broadcast sub-beams and respectively establishing the same CCE resource space for each downlink broadcast sub-beam;
a beam allocation module, configured to allocate, according to beam location information of a user terminal in the downlink broadcast beam, the corresponding downlink broadcast sub-beam to the user terminal;
a current downlink control information generating module, configured to perform channel coding on original downlink control information corresponding to the user terminal located in the same downlink broadcast sub-beam, respectively, to obtain current downlink control information corresponding to the user terminal;
and the control channel resource allocation module is used for allocating target CCE resources for the current downlink control information corresponding to the user terminal from the virtual CCE resource space according to the corresponding polymerization degree, the corresponding scheduling sequence and the corresponding downlink broadcast sub-beam of the user terminal.
9. The apparatus of claim 8, wherein the beam allocation module comprises:
a first judging subunit, configured to judge, according to beam position information of the user terminal in the downlink broadcast beam, whether the user terminal is located in a beam junction area between any two adjacent first downlink broadcast sub-beams and a second downlink broadcast sub-beam, if yes, enter the first processing subunit, and if not, enter the second processing subunit;
a first processing subunit, configured to enable the ue to correspond to the first downlink broadcast sub-beam and the second downlink broadcast sub-beam respectively;
and a second processing subunit, configured to allocate, to the user terminal, a downlink broadcast sub-beam corresponding to the beam position information.
10. The apparatus of claim 8, wherein the control channel resource allocation module comprises:
a first allocation sequence obtaining subunit, configured to determine, according to the number of the downlink broadcast sub-beams corresponding to the user terminal, a first allocation sequence corresponding to the user terminal;
a second determining subunit, configured to determine whether the number of downlink broadcast sub-beams corresponding to a first in-sequence user terminal is two if the first in-sequence user terminal in the same sequence exists in the first allocation sequence;
a second allocation sequence acquiring subunit, configured to determine, if yes, a second allocation sequence corresponding to the first peer user terminal according to the scheduling sequence corresponding to the first peer user terminal;
a third allocation sequence obtaining subunit, configured to determine, if the first allocation sequence is not the same as the first allocation sequence, a third allocation sequence corresponding to the first in-sequence user terminal according to the aggregation level corresponding to the first in-sequence user terminal;
a fourth distribution sequence obtaining subunit, configured to determine, if a second identical-sequence user terminal in the same sequence exists in the third distribution sequence, a fourth distribution sequence corresponding to the second identical-sequence user terminal according to a scheduling sequence corresponding to the second identical-sequence user terminal;
and a control channel resource allocation subunit, configured to allocate, according to the first allocation order, the second allocation order, the third allocation order, and the fourth allocation order, a target CCE resource for the current downlink control information corresponding to the user terminal from the virtual CCE resource space.
11. The apparatus of claim 10, wherein the first allocation order obtaining subunit is further configured to sort the user terminals according to a descending order of the number of downlink broadcast sub-beams corresponding to the user terminals, so as to obtain the first allocation order corresponding to the user terminals.
12. The apparatus according to claim 11, wherein the third allocation order obtaining subunit is further configured to sort the first in-sequence user terminals according to a descending order of the degree of aggregation corresponding to the first in-sequence user terminals, so as to obtain a third allocation order corresponding to the first in-sequence user terminals.
13. A wireless communication signal transmission apparatus comprising the control channel resource allocation apparatus according to any one of claims 8 to 12, the wireless communication signal transmission apparatus further comprising:
a current multiplexing information obtaining module, configured to multiplex current downlink control information located in the same downlink broadcast sub-beam according to a target CCE resource allocated by the current downlink control information, and generate current multiplexing information;
and the signal processing and transmitting module is used for respectively carrying out channel processing on the current multiplexing information corresponding to each broadcasting sub-beam, generating orthogonal frequency division multiplexing symbols together and transmitting the orthogonal frequency division multiplexing symbols in a space division mode.
14. The apparatus of claim 13, wherein the signal transmitting module is further configured to perform scrambling, modulation, layer mapping, and precoding processing on the current multiplexing information corresponding to each of the broadcast sub-beams, and multiply the broadcast weight of the downlink broadcast sub-beam corresponding to the current multiplexing information and perform resource mapping, so as to jointly generate an orthogonal frequency division multiplexing symbol, and transmit the orthogonal frequency division multiplexing symbol in a space division manner.
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| US8432879B2 (en) * | 2007-02-06 | 2013-04-30 | Nec Corporation | Method of transmitting control channel information in an OFDM communication system downlink |
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| CN101583135B (en) * | 2009-06-17 | 2011-06-01 | 新邮通信设备有限公司 | Method for improving TD-SCDMA system capacity |
| WO2012134535A1 (en) * | 2011-04-01 | 2012-10-04 | Intel Corporation | Enhanced node b and method of transmitting physical-downlink control channels (pdcchs) in a lte-a system |
| CN102281247B (en) * | 2011-08-26 | 2017-12-29 | 中兴通讯股份有限公司 | A kind of control channel resource allocation method and system |
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