CN112512125B - Scheduling request resource allocation method, scheduling request sending method and device - Google Patents
Scheduling request resource allocation method, scheduling request sending method and device Download PDFInfo
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Abstract
The embodiment of the invention provides a scheduling request resource allocation method, a scheduling request sending method and a scheduling request sending device, wherein in the scheduling request resource allocation method, the time delay requirement of a user terminal is determined; and selecting a target SR resource unit from SR resources corresponding to a cell in which the user terminal is positioned based on the time delay requirement of the user terminal, and distributing the target SR resource unit to the user terminal. The scheduling request resource allocation method, the scheduling request sending method and the scheduling request sending device provided by the embodiment of the invention can enable a communication system to support more user terminal numbers, enable SR resource units allocated to the user terminals with first-class delay requirements to meet the delay requirements, and ensure that the user terminals with second-class delay requirements can still complete SR through the allocated SR resource units.
Description
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a scheduling request resource allocation method, a scheduling request sending method, and a scheduling request sending device.
Background
Currently, the authorized frequency points of the multi-sub-band communication system are discretely distributed on the frequency band of 223.525 MHz-231.65 MHz, and each bandwidth is 25kHz and is called a physical sub-band. Wherein, the physical sub-bands of the dividing points of the independent dividing part are used as resident sub-bands, and the physical sub-bands of the rest frequency points are used as working sub-bands. After the User terminal completes initial access, the base station designates a scheduling request (Scheduling Request, SR) resource for the User terminal (UE), and the UE receives the SR resource on the resident sub-band and transmits the SR to the base station through the SR resource. When the UE has uplink service to send, the UE in radio resource control (Radio Resource Control, RRC) connection state directly initiates SR on the SR resources allocated by the base station, and then the base station designates a working sub-band for the UE according to the system condition, and the UE is switched to the working sub-band to work.
For each camping subband, the UPpts position of the radio frame is allocated as the position for bearing the SR, and 8 random access Preamble preambles are generated by cyclic shift on the UPpts position, so for each camping subband, the base station can allocate each radio frame to 8 UEs in the cell as SR resources at most without repetition. When the number of UEs in a cell increases, SR resources need to be increased by increasing a user residence factor, resisiting f, which is a radio frame multiple of the cell that is increased to increase the number of UEs. For example, when SR does not need to be repeatedly sent, one radio frame may support 8 UEs to access, and 8×8=64 UEs are allocated to 8×8 radio frames as one SR period. In actual work, in order to improve the gain, the base station is ensured to accurately analyze the SR of the UE with poor coverage and weak signal in the cell, and the UE needs to repeatedly send the SR, so that the actual period (SR-Periodicity) of the SR resource is the resisitive F multiplied by the SR repetition number. As shown in fig. 1, a schematic configuration diagram of an actual period of SR resources when UEs repeatedly transmit SRs in a communication system is shown, each radio frame can carry 8 UEs, and each of the residontf radio frames is repeatedly transmitted once and can carry 8×residontf UEs once.
However, two types of UEs exist in the communication system, one type of UEs has more uplink service and higher delay requirement, and SR needs to be completed quickly and reliably, so that resources for transmitting the uplink service are obtained in time; another type of UE has less uplink service, is insensitive to time delay, and can wait for the system to reallocate the uplink idle resources for uplink service. If the number of UEs supported by the communication system is to be increased, the residontf needs to be increased. On the premise of a certain number of SR repetitions, the increase of the residontf increases the actual period of SR resources, namely increases the time delay of transmitting SR by the UE, and is difficult to meet the requirement of the UE with higher time delay, so that the number of UEs supported by the communication system is increased and the requirement of the user with high time delay is contradicted, and the number of UEs and the requirement of the user with high time delay cannot be met at the same time.
Therefore, there is an urgent need to provide a scheduling request resource allocation method, a scheduling request sending method and a scheduling request sending device.
Disclosure of Invention
In order to overcome the above problems or at least partially solve the above problems, embodiments of the present invention provide a scheduling request resource allocation method, a scheduling request sending method, and a scheduling request sending device.
In a first aspect, an embodiment of the present invention provides a method for allocating scheduling request resources, including:
Determining the time delay requirement of a user terminal;
selecting a target SR resource unit from SR resources corresponding to a cell in which the user terminal is positioned based on the time delay requirement of the user terminal, and distributing the target SR resource unit to the user terminal;
wherein the delay requirements at least comprise a first type of delay requirement and a second type of delay requirement; the SR resources at least comprise a first class SR resource unit group and a second class SR resource unit group, wherein the SR resource units in the first class SR resource unit group are used for being distributed to the user terminals with the first class time delay requirements, and the SR resource units in the second class SR resource unit group are used for being distributed to the user terminals with the second class time delay requirements.
Preferably, the first class SR resource unit group and the second class SR resource unit group are determined based on the following method:
determining an SR resource classification unit based on the physical resource information of the cell;
dividing the SR resources into the first class SR resource unit group and the second class SR resource unit group based on the SR resource classification unit;
the SR resource classification unit is a root parameter of a ZC sequence, a resident sub-band, a wireless frame obtained by expanding based on a user resident factor of the cell or a Preamble symbol obtained based on cyclic shift.
Preferably, the determining an SR resource classification unit based on physical resource information of the cell specifically includes:
if judging that the physical resource information comprises the root parameters of the ZC sequences with the first preset value, taking the root parameters of each ZC sequence as the SR resource classification unit;
if judging that the physical resource information comprises a second preset number of resident sub-bands, taking each resident sub-band as the SR resource classification unit;
the first preset value and the second preset value are both determined based on the number of the user terminals requiring the first type of delay in the cell.
Preferably, the determining an SR resource classification unit based on physical resource information of the cell specifically includes:
if judging that the physical resource information is known, the method comprises the following steps: the user resident factor of the cell is larger than 1, and the number of the radio frames obtained based on the user resident factor expansion of the cell is larger than a third preset value, each radio frame obtained based on the user resident factor expansion of the cell is used as the SR resource classification unit;
if judging that the physical resource information is known, the method comprises the following steps: the residence factor of the cell is larger than 1, and the number of Preamble symbols obtained based on cyclic shift is a fourth preset value, then each Preamble symbol obtained based on cyclic shift is used as the SR resource classification unit;
And the third preset value and the fourth preset value are determined based on the number of the user terminals requiring the first type of time delay in the cell.
Preferably, the SR resource units in the first type SR resource unit group are configured to be allocated to the user terminal requiring the first type delay, and specifically include:
each SR resource unit in the first SR resource unit group is used for being distributed to a user terminal of the first time delay requirement in the cell; in response to this, the control unit,
the SR resource units in the second class SR resource unit group are configured to be allocated to the user terminal requiring the second class delay, and specifically include:
and all SR resource units in the second-class SR resource unit group are used for being distributed to all user terminals requiring the second-class delay in the cell, and each SR resource unit in the second-class SR resource unit group is distributed to at least one user terminal requiring the second-class delay in the cell.
In a second aspect, an embodiment of the present invention provides a method for sending a scheduling request, including:
acquiring a target SR resource unit distributed by a base station; the target SR resource unit is selected from SR resources corresponding to a cell where the user terminal is located by the base station based on the time delay requirement of the user terminal;
Transmitting an SR to the base station based on the target SR resource unit;
wherein the delay requirements at least comprise a first type of delay requirement and a second type of delay requirement; the SR resources at least comprise a first class SR resource unit group and a second class SR resource unit group, wherein the SR resource units in the first class SR resource unit group are used for being distributed to the user terminals with the first class time delay requirements, and the SR resource units in the second class SR resource unit group are used for being distributed to the user terminals with the second class time delay requirements.
In a third aspect, an embodiment of the present invention provides a scheduling request resource allocation apparatus, including:
the time delay requirement determining module is used for determining the time delay requirement of the user terminal;
the allocation module is used for selecting a target SR resource unit from SR resources corresponding to a cell where the user terminal is located based on the time delay requirement of the user terminal, and allocating the target SR resource unit to the user terminal;
wherein the delay requirements at least comprise a first type of delay requirement and a second type of delay requirement; the SR resources at least comprise a first class SR resource unit group and a second class SR resource unit group, wherein the SR resource units in the first class SR resource unit group are used for being distributed to the user terminals with the first class time delay requirements, and the SR resource units in the second class SR resource unit group are used for being distributed to the user terminals with the second class time delay requirements.
In a fourth aspect, an embodiment of the present invention provides a scheduling request transmitting apparatus, including:
the SR resource unit acquisition module is used for acquiring a target SR resource unit distributed by the base station; the target SR resource unit is selected from SR resources corresponding to a cell where the user terminal is located by the base station based on the time delay requirement of the user terminal;
a transmitting module, configured to transmit an SR to the base station based on the target SR resource unit;
wherein the delay requirements at least comprise a first type of delay requirement and a second type of delay requirement; the SR resources at least comprise a first class SR resource unit group and a second class SR resource unit group, wherein the SR resource units in the first class SR resource unit group are used for being distributed to the user terminals with the first class time delay requirements, and the SR resource units in the second class SR resource unit group are used for being distributed to the user terminals with the second class time delay requirements.
In a fifth aspect, an embodiment of the present invention provides an electronic device, including: a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the scheduling request resource allocation method according to the first aspect or the scheduling request transmission method according to the second aspect when the program is executed.
In a sixth aspect, an embodiment of the present invention provides a non-transitory computer readable storage medium, which when executed by a processor implements the steps of the scheduling request resource allocation method according to the first aspect or the scheduling request transmission method according to the second aspect.
The embodiment of the invention provides a scheduling request resource allocation method, a scheduling request sending method and a scheduling request sending device, wherein in the scheduling request resource allocation method, the time delay requirement of a user terminal is determined; and selecting a target SR resource unit from SR resources corresponding to a cell in which the user terminal is positioned based on the time delay requirement of the user terminal, and distributing the target SR resource unit to the user terminal. The SR resources at least comprise a first class SR resource unit group and a second class SR resource unit group, which respectively correspond to the user terminals requiring the first class time delay and the user terminals requiring the second class time delay. The method can enable the communication system to support more user terminals, enable the SR resource units allocated to the user terminals with the first type of time delay requirements to meet the time delay requirements, and ensure that the user terminals with the second type of time delay requirements can still complete SR through the allocated SR resource units, so that the base station can realize scheduling of service resources for the user terminals in the cell.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic configuration diagram of an actual period of SR resources when a UE repeatedly transmits SRs in a communication system according to the prior art;
fig. 2 is a flow chart of a scheduling request resource allocation method according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an SR resource configuration structure with a resident sub-band as an SR resource classification unit in the embodiment of the disclosure;
fig. 4 is a schematic diagram of an SR resource allocation structure using a radio frame as an SR resource classification unit according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an SR resource configuration structure with a Preamble symbol as an SR resource classification unit in the embodiment of the disclosure;
fig. 6 is a flow chart of a scheduling request sending method according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a scheduling request resource allocation apparatus according to an embodiment of the present invention;
Fig. 8 is a schematic structural diagram of a scheduling request sending device according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the embodiments of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in embodiments of the present invention will be understood in detail by those of ordinary skill in the art.
As shown in fig. 2, an embodiment of the present invention provides a scheduling request resource allocation method, including:
s11, determining the time delay requirement of a user terminal;
s12, selecting a target SR resource unit from SR resources corresponding to a cell where the user terminal is located based on the time delay requirement of the user terminal, and distributing the target SR resource unit to the user terminal;
wherein the delay requirements at least comprise a first type of delay requirement and a second type of delay requirement; the SR resources at least comprise a first class SR resource unit group and a second class SR resource unit group, wherein the SR resource units in the first class SR resource unit group are used for being distributed to the user terminals with the first class time delay requirements, and the SR resource units in the second class SR resource unit group are used for being distributed to the user terminals with the second class time delay requirements.
Specifically, in the scheduling request (Scheduling Request, SR) resource allocation method provided in the embodiment of the present invention, the execution body is a base station, and the specific application scenario is: after a certain User Equipment (UE) completes initial access with a base station, the base station sends a target SR resource unit for transmitting SR to the UE, where the UE may be a User terminal in each cell within the coverage area of the base station. The SR resource unit is the minimum unit of SR resources, and is the carrier of SR.
First, step S11 is performed, and the base station determines the delay requirement of the UE. Because the base station and the UE complete initial access, the UE is in a radio resource control (Radio Resource Control, RRC) connected state, and the base station may determine the delay requirement of the UE through the RRC connected state. The delay requirements at least comprise a first type of delay requirement and a second type of delay requirement, and the types of the delay requirements can be specifically divided based on the service scene of the UE and the buffer capacity of the UE. The first type of delay requirement can be specifically a high delay requirement, the time unit is in millisecond (ms) level, and the UE of the first type of delay requirement is such as an alarm device; the second type of delay requirement may specifically be a low delay requirement, the time unit is in the second(s) level, and the UE of the second type of delay requirement, for example, an information acquisition device, etc., which is not specifically limited in the embodiment of the present invention.
Then, step S12 is executed, namely, according to the delay requirement of the UE, a target SR resource unit is selected from SR resources corresponding to the cell in which the UE is located, and the target SR resource unit is allocated to the UE, so that the UE sends an SR to the base station through the target SR resource unit. The SR resources corresponding to the cell in which the UE is located are already determined when the cell is established.
In the embodiment of the invention, the SR resources corresponding to each cell in the coverage area of the base station at least comprise a first type SR resource unit group and a second type SR resource unit group, wherein the first type SR resource unit group comprises a plurality of SR resource units, and all SR resource units in the first type SR resource unit group are used for being distributed to the UE with the first type time delay requirement; the second class of SR resource unit group comprises a plurality of SR resource units, and all SR resource units in the second class of SR resource unit group are used for allocation to UEs requiring the second class of delay. The specific allocation mode can be selected according to the needs, so long as the time delay requirement of the UE can be met.
It should be noted that, to meet the first type of delay requirement, the number of all SR resource units in the first type of SR resource unit group may be greater than or equal to the number of UEs in the cell with the first type of delay requirement, so that the number of UEs in the cell with the first type of delay requirement may be increased. Therefore, in the embodiment of the invention, the number of all SR resource units in the first type SR resource unit group can be determined based on the number of UEs required by the first delay in the cell, and after the number of all SR resource units in the first type SR resource unit group is determined, the remaining SR resource units in the SR resource corresponding to the cell form the second type SR resource unit group, so as to determine the first type SR resource unit group and the second type SR resource unit group.
If the time delay requirement of the UE is the first type time delay requirement, selecting a target SR resource unit from a first type SR resource unit group in SR resources corresponding to a cell where the UE is located, and distributing the target SR resource unit to the UE so that the UE can send the SR to the base station through the target SR resource unit. If the time delay requirement of the UE is the second type time delay requirement, selecting a target SR resource unit from a second type SR resource unit group in SR resources corresponding to a cell where the UE is located, and distributing the target SR resource unit to the UE so that the UE can send the SR to the base station through the target SR resource unit.
If the time delay requirement of the UE is the first type of time delay requirement, the process of sending the SR to the base station by the UE is consistent with the process of sending the SR to the base station by the UE in the prior art; if the delay requirement of the UE is the second type delay requirement, the process of transmitting the SR to the base station by the UE is consistent with the random access process in the contention mode in the communication system, which is not described in detail in the embodiment of the present invention.
The scheduling request resource allocation method provided by the embodiment of the invention determines the time delay requirement of the user terminal; and selecting a target SR resource unit from SR resources corresponding to a cell in which the user terminal is positioned based on the time delay requirement of the user terminal, and distributing the target SR resource unit to the user terminal. The SR resources at least comprise a first class SR resource unit group and a second class SR resource unit group, which respectively correspond to the user terminals requiring the first class time delay and the user terminals requiring the second class time delay. The method can enable the communication system to support more user terminals, enable the SR resource units allocated to the user terminals with the first type of time delay requirements to meet the time delay requirements, and ensure that the user terminals with the second type of time delay requirements can still complete SR through the allocated SR resource units, so that the base station can realize scheduling of service resources for the user terminals in the cell.
On the basis of the foregoing embodiments, in the scheduling request resource allocation method provided in the embodiments of the present invention, the first type SR resource unit group and the second type SR resource unit group are determined based on the following method:
determining an SR resource classification unit based on the physical resource information of the cell;
dividing the SR resources into the first class SR resource unit group and the second class SR resource unit group based on the SR resource classification unit;
the SR resource classification unit is a root parameter of a ZC sequence, a resident sub-band, a wireless frame obtained by expanding based on a user resident factor of the cell or a Preamble symbol obtained based on cyclic shift.
Specifically, in the embodiment of the present invention, when determining a first type SR resource unit group and the second type SR resource unit group in SR resources, the method is specifically implemented as follows: first, an SR resource classification unit is determined based on physical resource information of a cell. The physical resource information of the cell is allocated based on the time base when the cell is established, and specifically may include: the ZC sequences, the resident sub-bands, the radio frames or the Preamble codes can be used as SR resource classification units, which is specifically selected as the SR resource classification unit to determine according to the physical resource information of the cell, so long as the SR resources of the cell can be divided into a first type SR resource unit group and a second type SR resource unit group according to the determined SR resource classification unit, the SR resource units in the first type SR resource unit group are used for being distributed to the user terminals requiring the first type delay, and the SR resource units in the second type SR resource unit group are used for being distributed to the user terminals requiring the second type delay.
And then dividing the SR resources according to the determined SR resource classification unit.
In the embodiment of the invention, when the first type SR resource unit group and the second type SR resource unit group are determined, the SR resource unit is determined by combining the physical resource information of the cell, and then the SR resource is divided according to the SR resource unit, so that the obtained first type SR resource unit group and the second type SR resource unit group meet the requirements more and the dividing mode is more reasonable.
On the basis of the foregoing embodiment, the scheduling request resource allocation method provided in the embodiment of the present invention, where the determining an SR resource classification unit based on physical resource information of the cell specifically includes:
if judging that the physical resource information comprises the root parameters of the ZC sequences with the first preset values, taking the root parameters of the ZC sequences as the SR resource classification unit;
if judging that the physical resource information comprises a second preset number of resident sub-bands, taking the resident sub-bands as the SR resource classification unit;
the first preset value and the second preset value are both determined based on the number of the user terminals requiring the first type of delay in the cell.
Specifically, in the embodiment of the present invention, since the ZC sequence, the resident sub-band, the radio frame or the Preamble code can be used as the SR resource classification unit, it can be respectively determined whether the root parameter, the resident sub-band, the radio frame or the Preamble code of the ZC sequence can be used as the SR resource classification unit.
Judging whether the physical resource information of the cell contains the root parameters of the ZC sequences of the first preset value, and if so, taking the root parameters of the ZC sequences as an SR resource classification unit. Wherein the first preset value is determined based on the number of user terminals in the cell for which the first type of delay requirement is present. Correspondingly, based on the SR resource classification unit, the SR resource is divided into the first class SR resource unit group and the second class SR resource unit group, which specifically includes: selecting the root parameters of the ZC sequences of the first appointed value from the root parameters of the ZC sequences of the first preset value, and forming a first type SR resource unit group by SR resource units corresponding to the root parameters of the ZC sequences of the first appointed value; the SR resource units corresponding to the root parameters of the residual ZC sequences form a second class SR resource unit group.
Judging whether the physical resource information of the cell contains a second preset number of resident sub-bands, and if so, taking each resident sub-band as an SR resource classification unit. Wherein the second preset value is determined based on the number of user terminals within the cell for which the first class of delay requirements are present. Correspondingly, based on the SR resource classification unit, the SR resource is divided into the first class SR resource unit group and the second class SR resource unit group, which specifically includes: selecting a second appointed number of resident sub-bands from the second preset number of resident sub-bands, wherein SR resource units corresponding to the second appointed number of resident sub-bands form a first SR resource unit group; the SR resource units corresponding to the residual resident sub-bands form a second class SR resource unit group.
It should be noted that, in the embodiment of the present invention, whether the resident sub-band can be used as the SR resource classification unit may be performed when the number of root parameters of the ZC sequence included in the physical resource information of the cell is smaller than a first preset value, which is not specifically limited in the embodiment of the present invention.
The embodiment of the invention provides two SR resource classification units, which can enable a base station to select a proper SR resource classification unit according to the physical resource information of a cell, thereby being convenient for determining a first type SR resource unit group and a second type SR resource unit group.
On the basis of the foregoing embodiment, the scheduling request resource allocation method provided in the embodiment of the present invention, where the determining an SR resource classification unit based on physical resource information of the cell specifically includes:
if judging that the physical resource information is known, the method comprises the following steps: the user resident factor of the cell is larger than 1, and the number of the radio frames obtained based on the expansion of the user resident factor of the cell is larger than a third preset value, and the radio frames obtained based on the expansion of the user resident factor of the cell are used as the SR resource classification unit;
if judging that the physical resource information is known, the method comprises the following steps: the residence factor of the cell is larger than 1, and the number of Preamble symbols obtained based on cyclic shift is a fourth preset value, and the Preamble symbols obtained based on cyclic shift are used as the SR resource classification unit;
And the third preset value and the fourth preset value are determined based on the number of the user terminals requiring the first type of time delay in the cell.
Specifically, in the embodiment of the present invention, it is determined whether the radio frame can be used as an SR resource classification unit. Because the radio frames included in the physical resource information of the cell are obtained by expanding the user residence factor, whether the user residence factor of the cell is larger than 1 or not can be judged, and if the user residence factor is larger than 1 and the number of the radio frames obtained by expanding the user residence factor based on the cell is larger than a third preset value, the radio frames obtained by expanding the user residence factor based on the cell are used as the SR resource classification unit. Wherein the third preset value is determined based on the number of user terminals within the cell that are required for the first type of delay. Correspondingly, based on the SR resource classification unit, the SR resource is divided into the first class SR resource unit group and the second class SR resource unit group, which specifically includes: selecting a third appointed numerical value radio frame from radio frames obtained by expanding the user residence factors, wherein SR resource units corresponding to the third appointed numerical value radio frames form a first SR resource unit group; the SR resource units corresponding to the rest radio frames form a second class SR resource unit group.
In the embodiment of the invention, whether the Preamble accords with the SR resource classification unit can be judged. Because the Preamble symbol included in the physical resource information of the cell is generated by cyclic shift at the position of the Uppts of the radio frame, and the radio frame is obtained by expanding the user residence factor of the cell, it is firstly determined whether the user residence factor of the cell is greater than 1 in the physical resource information of the cell, and if the user residence factor is greater than 1 and the number of the Preamble symbols obtained based on cyclic shift is a fourth preset value, the Preamble symbol obtained based on cyclic shift is used as the SR resource classification unit. Wherein the third preset value and the fourth preset value are both determined based on the number of user terminals in the cell that are required for the first class of delay. Correspondingly, based on the SR resource classification unit, the SR resource is divided into the first class SR resource unit group and the second class SR resource unit group, which specifically includes: selecting a fourth appointed numerical value Preamble symbol from the Preamble symbols obtained by cyclic shift, wherein SR resource units corresponding to the fourth appointed numerical value Preamble symbol form a first class SR resource unit group; the SR resource units corresponding to the residual Preamble symbols form a second class SR resource unit group.
It should be noted that, since the Preamble symbol is generated by cyclic shift at the position of the Uppts of the radio frame, generally, 8 Preamble symbols are generated by cyclic shift at the position of the Uppts of each radio frame, that is, the value of the fourth preset value may be 8.
It should be noted that, the determining whether the radio frame can be used as the SR resource classification unit may be performed when the number of residing subbands included in the physical resource information of the cell is smaller than the second preset value, that is, only one residing subband exists in the cell or the number of residing subbands is smaller. The determining whether the Preamble symbol can be used as the SR resource classification unit may be performed when the number of radio frames that are included in the physical resource information of the cell and obtained based on the expansion of the user residence factor of the cell is less than or equal to a third preset value.
The embodiment of the invention provides two other SR resource classification units, which can enable the base station to select a proper SR resource classification unit according to the physical resource information of the cell, thereby being convenient for determining a first type SR resource unit group and a second type SR resource unit group.
On the basis of the foregoing embodiments, the scheduling request resource allocation method provided in the embodiments of the present invention, where SR resource units in the first type SR resource unit group are used for allocation to the user terminal with the first type delay requirement, specifically includes:
Each SR resource unit in the first SR resource unit group is used for being distributed to a user terminal of the first time delay requirement in the cell; in response to this, the control unit,
the SR resource units in the second class SR resource unit group are configured to be allocated to the user terminal requiring the second class delay, and specifically include:
and all SR resource units in the second-class SR resource unit group are used for being distributed to all user terminals requiring the second-class delay in the cell, and each SR resource unit in the second-class SR resource unit group is distributed to at least one user terminal requiring the second-class delay in the cell.
Specifically, in the embodiment of the present invention, when a base station selects an SR resource unit from SR resource units in a first type SR resource unit group and allocates the SR resource unit to a user terminal with a first type delay requirement, each SR resource unit in the first type SR resource unit group is allocated to a user terminal with a first type delay requirement in a cell, that is, a user terminal with a first type delay requirement allocates an SR resource unit; correspondingly, all SR resource units in the second-class SR resource unit group are distributed to all user terminals requiring the second-class delay in the cell, and each SR resource unit in the second-class SR resource unit group is distributed to at least one user terminal requiring the second-class delay in the cell.
The scheduling request resource allocation method provided in the embodiment of the present invention is specifically described in the following by using a specific example.
For a cell within the coverage area of a base station, it is assumed that physical resource information of the cell includes: and 4 resident subbands, wherein the user resident factor of each resident subband is reserved as a factor of 11 (11), 8 Preamble symbols are obtained based on cyclic shift, namely 8 SR resource units are corresponding to each radio frame, and the SR resources of the cell comprise 4 multiplied by 8=128 SR resource units in total. According to the physical resource information of the cell, it can be determined that the SR resource partitioning unit is a resident subband, if one SR resource unit corresponding to the resident subband is selected to form a first type SR resource unit group, SR resource units corresponding to the remaining three resident subbands form a second type SR resource unit group, and each SR resource unit in the second type SR resource unit group can be allocated to at most 8 user terminals with a second type delay requirement, a schematic SR resource allocation structure using the resident subband as an SR resource classification unit is shown in fig. 3. Only the dwell sub-band 1 and dwell sub-band 4 are shown in fig. 3, and the SR resource units corresponding to dwell sub-band 1 are selected to form a first type SR resource unit group, and the SR resource units corresponding to dwell sub-bands 2-4 form a second type SR resource unit group. Each SR resource unit in the first type SR resource unit group is allocated to 1 ue with a first type delay requirement, for example, 8 SR resource units corresponding to a first radio frame on the residence subband 1 may be allocated to ues A1-A8, and so on, the number of ues with a first type delay requirement that is supportable on the residence subband 1 is 8×4=32. Each SR resource element in the second class SR resource element group is allocated to 8 user terminals of the second class delay requirement, taking as an example 8 SR resource elements 1, 2, 3, 4, 5, 6, 7, 8 corresponding to the first radio frame on the dwell subband 4, SR resource element 1 may be allocated to user terminals B1-B8 at most, SR resource element 2 may be allocated to user terminals B9-B16 at most, SR resource element 3 may be allocated to user terminals B17-B24 at most, SR resource element 4 may be allocated to user terminals B25-B32 at most, SR resource element 5 may be allocated to user terminals B33-B40 at most, SR resource element 6 may be allocated to user terminals B41-B48 at most, SR resource element 7 may be allocated to user terminals B49-B56 at most, SR resource element 8 may be allocated to user terminals B57-B64 at most, and so on, the number of user terminals of the second class delay requirement co-allocable on the dwell subband 2-4 is 3×8×8=768. The SR resources of the cell shown in fig. 3 can be allocated to 800 user terminals in total for SR. And the SR resources of the cell are allocated to 4×8×4=128 user terminals for SR by adopting the scheme provided in the prior art. As can be seen, in the scheduling request resource allocation method provided in the embodiment of the present invention, under the condition that the total number of SR resource units in the SR resource is unchanged, the number of allocable user terminals is increased by 6.25 times compared with the prior art.
For a cell within the coverage area of a base station, it is assumed that physical resource information of the cell includes: 1 dwell subband, the user dwell factor of each dwell subband, residontf=4, based on cyclic shift to obtain 8 Preamble symbols, i.e. 8 SR resource units per radio frame, the SR resources of the cell comprise a total of 4×8=32 SR resource units. According to the physical resource information of the cell, it can be determined that the SR resource dividing unit is a radio frame, if an SR resource unit corresponding to one radio frame is selected to form a first type SR resource unit group, SR resource units corresponding to the remaining three radio frames form a second type SR resource unit group, and each SR resource unit in the second type SR resource unit group can be allocated to at most 8 user terminals requiring the second type delay, an SR resource allocation structure diagram using the radio frame as an SR resource classifying unit is shown in fig. 4. And selecting the SR resource unit corresponding to the first radio frame to form a first type SR resource unit group, and forming the SR resource unit corresponding to the rest radio frames to form a second type SR resource unit group. Each SR resource unit in the first-class SR resource unit group is allocated to 1 ue with a first-class delay requirement, for example, 8 SR resource units corresponding to a first radio frame may be allocated to ues A1-A8, respectively, where the number of ues with the first-class delay requirement that are supportable on the first radio frame is 8. Each SR resource unit in the second class SR resource unit group is allocated to 8 user terminals with a second class delay requirement, taking as an example 8 SR resource units 9, 10, 11, 12, 13, 14, 15, 16 corresponding to the second radio frame, SR resource unit 9 may be allocated to user terminals B1-B8 at most, SR resource unit 10 may be allocated to user terminals B9-B16 at most, SR resource unit 11 may be allocated to user terminals B17-B24 at most, SR resource unit 12 may be allocated to user terminals B25-B32 at most, SR resource unit 13 may be allocated to user terminals B33-B40 at most, SR resource unit 14 may be allocated to user terminals B41-B48 at most, SR resource unit 15 may be allocated to user terminals B49-B56 at most, SR resource unit 16 may be allocated to user terminals B57-B64 at most, and so on, the number of user terminals with a second class delay requirement that is 3×8×8=192 that are co-allocable on the second radio frame, the third radio frame and the fourth radio frame. The SR resources of the cell shown in fig. 4 can be allocated to 200 user terminals in total for SR. And the SR resources of the cell are allocated to 4×8=32 user terminals for SR by adopting the scheme provided in the prior art for SR resource allocation. As can be seen, in the scheduling request resource allocation method provided in the embodiment of the present invention, under the condition that the total number of SR resource units in the SR resource is unchanged, the number of allocable user terminals is increased by 6.25 times compared with the prior art.
For a cell within the coverage area of a base station, the SR adopts a Zadoff-Chu sequence (i.e., ZC sequence), the position of the UPpts in the radio frame on the resident sub-band is allocated as the position of the SR, and the physical resource information of the cell is assumed to include: 1 dwell subband, the user dwell factor of each dwell subband, the dwell factor of each dwell subband is=4, 8 ZC sequences are obtained based on cyclic shift, namely 8 Preamble symbols. The SR repetition number is 4, so 16 radio frames are the actual period of one SR. According to the physical resource information of the cell, it can be determined that the SR resource partitioning unit is a Preamble symbol, if 6 SR resource units corresponding to the Preamble symbol are selected to form a first SR resource unit group, the SR resource units corresponding to the remaining 2 Preamble symbols form a second SR resource unit group, and each SR resource unit in the second SR resource unit group can be allocated to at most 8 user terminals with a second delay requirement, a SR resource configuration structure diagram using the Preamble symbol as an SR resource classification unit is shown in fig. 5. The SR resource units corresponding to the first 6 Preamble symbols are selected to form a first type SR resource unit group, and the SR resource units corresponding to the remaining 2 Preamble symbols form a second type SR resource unit group. Each SR resource unit in the first-class SR resource unit group is allocated to 1 user terminal of the first-class delay requirement, and the number of user terminals of the first-class delay requirement, which are allocated altogether by the SR resource units in the first-class SR resource unit group, is 6×4=24. Each Preamble symbol in the second type SR resource unit group is allocated to 12×4=48 (i.e. each Preamble symbol corresponds to 4 radio frames, each radio frame can be allocated to 12 user terminals) of the second type delay requirement, and the number of user terminals of the second type delay requirement, which are allocable by SR resource units in the second type SR resource unit group, is 2×12×4=96. The SR resources of the cell shown in fig. 5 can be allocated to 120 user terminals in total for SR. And the SR resources of the cell are allocated to 4×8=32 user terminals for SR by adopting the scheme provided in the prior art for SR resource allocation. As can be seen, in the scheduling request resource allocation method provided in the embodiment of the present invention, under the condition that the total number of SR resource units in the SR resource is unchanged, the number of allocable user terminals is increased by 3.75 times compared with the prior art.
As shown in fig. 6, on the basis of the foregoing embodiment, the embodiment of the present invention provides a method for sending a scheduling request, including:
s61, acquiring a target SR resource unit distributed by a base station; the target SR resource unit is selected from SR resources corresponding to a cell where the user terminal is located by the base station based on the time delay requirement of the user terminal;
s62, transmitting SR to the base station based on the target SR resource unit;
wherein the delay requirements at least comprise a first type of delay requirement and a second type of delay requirement; the SR resources at least comprise a first class SR resource unit group and a second class SR resource unit group, wherein the SR resource units in the first class SR resource unit group are used for being distributed to the user terminals with the first class time delay requirements, and the SR resource units in the second class SR resource unit group are used for being distributed to the user terminals with the second class time delay requirements.
Specifically, in the embodiment of the present invention, the specific application scenario in which the execution body is the user terminal is: after the user terminal completes initial access with the base station, the base station allocates a target SR resource unit for transmitting SR to the user terminal, and the user terminal receives the target SR resource unit allocated by the base station. The user terminals here may be user terminals in cells within the coverage area of the base station.
Firstly, executing step S61 to obtain a target SR resource unit allocated by the base station; then, step S62 is performed to transmit an SR to the base station based on the target SR resource unit. If the time delay requirement of the user terminal is the first type of time delay requirement, the process of sending the SR to the base station by the user terminal is consistent with the process of sending the SR to the base station by the user terminal in the prior art; if the delay requirement of the ue is the second type delay requirement, the process of transmitting the SR to the base station by the ue is consistent with the random access process in the contention mode in the communication system, which is not described in detail in the embodiment of the present invention.
The determining of the target SR resource unit is performed by the base station, and the specific determining manner refers to the above embodiment, which is not described in detail in the embodiment of the present invention.
It should be noted that, in the embodiment of the present invention, the method for generating the SR by the user terminal specifically includes:
first, generating a ZC sequence by using a root parameter u, wherein the ZC sequence is shown in a formula (1):
second, a frequency domain signal is generated through discrete fourier transform (Discrete Fourier Transform, DFT), as shown in formula (2):
third, middle zero filling to N SEQ Points, as shown in equation (3):
X＝[X u ((N zc -1)/2),…,X u (N zc -1),0,0,…,0,X u (0),X u (1),…X u ((N zc -1)/2-1)] (3)
fourth, the basic sequence of SR is obtained through inverse discrete fourier transform (Inverse Discrete Fourier Transform, IDFT) and cyclic shift, as shown in formula (4):
s u (n)＝circshift(ifft(X(k)),Ncp)/(N ZC /N SEQ ) (4)
Fifthly, calculating a cyclic offset to obtain SR, wherein the SR is as shown in a formula (5):
S u,v (n)＝S u (mod(n-C v ,N seq )),n＝[0:N SEQ +Ncp-1] (5)
wherein,v is 0-7.
According to the scheduling request sending method provided by the embodiment of the invention, the user terminal sends the SR according to the target SR resource unit allocated by the base station, and when the time delay requirement of the user terminal is the first type of time delay requirement, the process of sending the SR to the base station by the user terminal is consistent with the process of sending the SR to the base station by the user terminal in the prior art; if the time delay requirement of the user terminal is the second type of time delay requirement, the process of the user terminal sending the SR to the base station is consistent with the random access process in the competition mode in the communication system. Thus, the time delay requirement of the user terminal can be met.
As shown in fig. 7, on the basis of the foregoing embodiment, an apparatus for allocating scheduling request resources is provided in an embodiment of the present invention, including: a latency requirement acquisition module 71 and an allocation module 72.
Wherein,
the delay requirement determining module 71 is configured to determine a delay requirement of the user terminal;
the allocation module 72 is configured to select a target SR resource unit from SR resources corresponding to a cell in which the ue is located based on a latency requirement of the ue, and allocate the target SR resource unit to the ue;
Wherein the delay requirements at least comprise a first type of delay requirement and a second type of delay requirement; the SR resources at least comprise a first class SR resource unit group and a second class SR resource unit group, wherein the SR resource units in the first class SR resource unit group are used for being distributed to the user terminals with the first class time delay requirements, and the SR resource units in the second class SR resource unit group are used for being distributed to the user terminals with the second class time delay requirements.
Specifically, the functions of each module in the scheduling request resource allocation device provided in the embodiment of the present invention are in one-to-one correspondence with the operation flows of each step in the above scheduling request resource allocation method embodiment, and the implemented effects are identical, which is not described in detail in the embodiment of the present invention.
As shown in fig. 8, on the basis of the above embodiment, an embodiment of the present invention provides a scheduling request sending apparatus, including: an SR resource unit acquisition module 81 and a transmission module 82.
Wherein,
the SR resource unit acquiring module 81 is configured to acquire a target SR resource unit allocated by a base station; the target SR resource unit is selected from SR resources corresponding to a cell where the user terminal is located by the base station based on the time delay requirement of the user terminal;
A transmitting module 82 configured to transmit an SR to the base station based on the target SR resource unit;
wherein the delay requirements at least comprise a first type of delay requirement and a second type of delay requirement; the SR resources at least comprise a first class SR resource unit group and a second class SR resource unit group, wherein the SR resource units in the first class SR resource unit group are used for being distributed to the user terminals with the first class time delay requirements, and the SR resource units in the second class SR resource unit group are used for being distributed to the user terminals with the second class time delay requirements.
Specifically, the functions of each module in the scheduling request sending device provided in the embodiment of the present invention are in one-to-one correspondence with the operation flows of each step in the above embodiment of the scheduling request sending method, and the implemented effects are identical, which is not described in detail in the embodiment of the present invention.
As shown in fig. 9, on the basis of the above embodiment, an electronic device is provided in an embodiment of the present invention, including: a processor (processor) 901, a memory (memory) 902, a communication interface (Communications Interface) 903, and a bus 904; wherein,
the processor 901, memory 902, and communication interface 903 communicate with each other via a bus 904. The memory 902 stores program instructions executable by the processor 901, and the processor 901 is configured to call the program instructions in the memory 902 to execute the scheduling request resource allocation method or the scheduling request sending method provided in the above method embodiments.
The logic instructions in memory 902 may be implemented in the form of software functional units and stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
On the basis of the foregoing embodiments, in an embodiment of the present invention, a non-transitory computer readable storage medium is provided, where the non-transitory computer readable storage medium stores computer instructions, where the computer instructions cause the computer to execute the scheduling request resource allocation method or the scheduling request sending method provided in the foregoing method embodiments.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A method for scheduling request resource allocation, comprising:
determining the time delay requirement of a user terminal;
selecting a target SR resource unit from SR resources corresponding to a cell in which the user terminal is positioned based on the time delay requirement of the user terminal, and distributing the target SR resource unit to the user terminal;
wherein the delay requirements at least comprise a first type of delay requirement and a second type of delay requirement; the SR resources at least comprise a first class SR resource unit group and a second class SR resource unit group, wherein the SR resource units in the first class SR resource unit group are used for being distributed to the user terminals with the first class time delay requirements, and the SR resource units in the second class SR resource unit group are used for being distributed to the user terminals with the second class time delay requirements;
The first class SR resource unit group and the second class SR resource unit group are determined based on the following method:
determining an SR resource classification unit based on the physical resource information of the cell;
dividing the SR resources into the first class SR resource unit group and the second class SR resource unit group based on the SR resource classification unit;
the SR resource classification unit is a root parameter of a ZC sequence, a resident sub-band, a wireless frame obtained by expanding based on a user resident factor of the cell or a Preamble symbol obtained based on cyclic shift.
2. The method for allocating scheduling request resources according to claim 1, wherein determining the SR resource classification unit based on the physical resource information of the cell specifically comprises:
if judging that the physical resource information comprises the root parameters of the ZC sequences with the first preset values, taking the root parameters of the ZC sequences as the SR resource classification unit;
if judging that the physical resource information comprises a second preset number of resident sub-bands, taking the resident sub-bands as the SR resource classification unit;
the first preset value and the second preset value are both determined based on the number of the user terminals requiring the first type of delay in the cell.
3. The method for allocating scheduling request resources according to claim 1, wherein determining the SR resource classification unit based on the physical resource information of the cell specifically comprises:
if judging that the physical resource information is known, the method comprises the following steps: the user resident factor of the cell is larger than 1, and the number of the radio frames obtained based on the expansion of the user resident factor of the cell is larger than a third preset value, and the radio frames obtained based on the expansion of the user resident factor of the cell are used as the SR resource classification unit;
if judging that the physical resource information is known, the method comprises the following steps: the residence factor of the cell is larger than 1, and the number of Preamble symbols obtained based on cyclic shift is a fourth preset value, and the Preamble symbols obtained based on cyclic shift are used as the SR resource classification unit;
and the third preset value and the fourth preset value are determined based on the number of the user terminals requiring the first type of time delay in the cell.
4. A method for allocating scheduling request resources according to any one of claims 1-3, wherein SR resource units in the first SR resource unit group are configured to be allocated to the user terminal requiring the first latency, specifically including:
Each SR resource unit in the first SR resource unit group is used for being distributed to a user terminal of the first time delay requirement in the cell; in response to this, the control unit,
the SR resource units in the second class SR resource unit group are configured to be allocated to the user terminal requiring the second class delay, and specifically include:
and all SR resource units in the second-class SR resource unit group are used for being distributed to all user terminals requiring the second-class delay in the cell, and each SR resource unit in the second-class SR resource unit group is distributed to at least one user terminal requiring the second-class delay in the cell.
5. A method for sending a scheduling request, comprising:
acquiring a target SR resource unit distributed by a base station; the target SR resource unit is based on a scheduling request resource allocation method according to any one of claims 1-4;
transmitting an SR to the base station based on the target SR resource unit;
wherein the delay requirements at least comprise a first type of delay requirement and a second type of delay requirement; the SR resources at least comprise a first class SR resource unit group and a second class SR resource unit group, wherein the SR resource units in the first class SR resource unit group are used for being distributed to the user terminals with the first class time delay requirements, and the SR resource units in the second class SR resource unit group are used for being distributed to the user terminals with the second class time delay requirements.
6. A scheduling request resource allocation apparatus, comprising:
the time delay requirement determining module is used for determining the time delay requirement of the user terminal;
the allocation module is used for selecting a target SR resource unit from SR resources corresponding to a cell where the user terminal is located based on the time delay requirement of the user terminal, and allocating the target SR resource unit to the user terminal;
wherein the delay requirements at least comprise a first type of delay requirement and a second type of delay requirement; the SR resources at least comprise a first class SR resource unit group and a second class SR resource unit group, wherein the SR resource units in the first class SR resource unit group are used for being distributed to the user terminals with the first class time delay requirements, and the SR resource units in the second class SR resource unit group are used for being distributed to the user terminals with the second class time delay requirements;
the first class SR resource unit group and the second class SR resource unit group are determined based on the following method:
determining an SR resource classification unit based on the physical resource information of the cell;
dividing the SR resources into the first class SR resource unit group and the second class SR resource unit group based on the SR resource classification unit;
The SR resource classification unit is a root parameter of a ZC sequence, a resident sub-band, a wireless frame obtained by expanding based on a user resident factor of the cell or a Preamble symbol obtained based on cyclic shift.
7. A scheduling request transmitting apparatus, comprising:
the SR resource unit acquisition module is used for acquiring a target SR resource unit distributed by the base station; the target SR resource unit is based on a scheduling request resource allocation method according to any one of claims 1-4;
a transmitting module, configured to transmit an SR to the base station based on the target SR resource unit;
wherein the delay requirements at least comprise a first type of delay requirement and a second type of delay requirement; the SR resources at least comprise a first class SR resource unit group and a second class SR resource unit group, wherein the SR resource units in the first class SR resource unit group are used for being distributed to the user terminals with the first class time delay requirements, and the SR resource units in the second class SR resource unit group are used for being distributed to the user terminals with the second class time delay requirements.
8. An electronic device, comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the scheduling request resource allocation method according to any one of claims 1-4 or the scheduling request transmission method according to claim 5 when the program is executed.
9. A non-transitory computer readable storage medium having stored thereon a computer program, which when executed by a processor, implements the steps of the scheduling request resource allocation method of any one of claims 1-4 or the scheduling request transmission method of claim 5.
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