CN109392047B - Method for indicating sub-band switching in orthogonal frequency division multiplexing system - Google Patents

Method for indicating sub-band switching in orthogonal frequency division multiplexing system Download PDF

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CN109392047B
CN109392047B CN201710681175.7A CN201710681175A CN109392047B CN 109392047 B CN109392047 B CN 109392047B CN 201710681175 A CN201710681175 A CN 201710681175A CN 109392047 B CN109392047 B CN 109392047B
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band
information
indication
user equipment
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CN109392047A (en
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周欣
姜春霞
吕征南
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Potevio Information Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/06—Reselecting a communication resource in the serving access point
    • 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
    • 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
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • 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 embodiment of the invention provides a method for switching sub-bands in an orthogonal frequency division multiplexing system. The method comprises the following steps: when the network side determines that the user equipment carries out intra-cell subband switching, the network side sends subband switching information to the user equipment through RRC signaling or DCI information so as to indicate the user equipment to switch working subbands and reconfigure SR resources; wherein the sub-band switching information comprises a sub-band information indication, a C-RNTI value and an SR indication. The embodiment of the invention provides a solution for Scheduling Request (SR) resource reconfiguration in a power communication system, a network side indicates sub-band switching to user equipment through RRC signaling or DCI information, and the user equipment performs sub-band switching and reconfigures SR resources after receiving the RRC signaling or the DCI information.

Description

Method for indicating sub-band switching in orthogonal frequency division multiplexing system
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method for indicating subband switching in an orthogonal frequency division multiplexing system.
Background
In a broadband access system, the available bandwidth of the system is divided into a plurality of continuous or discontinuous sub-bands, and each sub-band is transmitted by using Orthogonal Frequency Division Multiplexing (OFDM) technology. The sub-band is divided into synchronous sub-band and common sub-band according to the function, the synchronous sub-band is mainly used for the synchronization and broadcast channel of the up-down line, and the common sub-band is used for the transmission of normal service.
To reduce cost and implementation complexity, a User Equipment (UE) may support both multi-subband and single subband modes of operation, i.e., the UE receiver bandwidth need not be the entire system bandwidth, may support reception of multiple or a single subband, and need not necessarily be able to receive all subbands. Depending on the hardware capabilities, the UE supports operation on all or part of the sub-bands, with the simplest (i.e., low cost) UE supporting operation on a single sub-band. In this way, the requirements on the bandwidth of the UE receiver are reduced, and the requirements on the hardware capability of the system are also reduced.
The power load monitoring communication network is a typical application scenario, and the frequency spectrum of the power load monitoring communication network is discretely distributed on a 230M frequency band. The distribution diagram of the 230MHz frequency resource of the network is shown in fig. 1. It can be seen from the figure that the frequency spectrum is comb-shaped, the frequency resources of the frequency band can be divided into a plurality of sub-bands, the sub-band of the lowest frequency point is 223.525MHz, and the sub-band of the highest frequency point is 231.65 MHz.
For the UE supporting the single subband operating mode, Downlink Control Information (DCI) carried on a Downlink Control channel (PDCCH) must be independently transmitted on each subband, otherwise, the single subband UE cannot monitor the PDCCH due to the limitation of the receiver bandwidth. Therefore, a system scheme needs to be designed according to the characteristics of the frequency resources of the 230MHz frequency band, the requirements of the single-subband UE operating mode and the coverage requirements, and for the existing scheduling request SR resource configuration method, when subband switching occurs in a cell, a solution needs to be further provided for the scheduling request SR resource reconfiguration problem.
Disclosure of Invention
The present invention provides a method for scheduling request reconfiguration in an orthogonal frequency division multiplexing system that overcomes or at least partially solves the above mentioned problems.
According to an aspect of the present invention, there is provided a method for indicating a subband switching in an orthogonal frequency division multiplexing system, including:
when a network side determines that user equipment performs intra-cell subband switching, the network side sends subband switching information to the user equipment through RRC signaling or DCI information so as to indicate the user equipment to switch a working subband and reconfigure SR resource position information;
the sub-band switching information comprises sub-band information indication, C-RNTI value and SR indication; the subband information indication is used for indicating the subband number of the UE to be switched to a new subband; the C-RNTI value is a new C-RNTI value reconfigured for the UE by the network side; the SR indication is SR resource location information that the network side reconfigures for the UE.
According to another aspect of the present invention, there is also provided a method for indicating a subband switching in an orthogonal frequency division multiplexing system, including:
if the user equipment receives the sub-band switching information sent by the network side, the user equipment performs intra-cell sub-band switching, and reconfigures the current SR resource position information according to the sub-band switching information after the sub-band switching is completed; wherein the SR resource location information comprises a sub-band information indication, a C-RNTI value and an SR indication.
The embodiment of the invention provides an indication method for subband switching in an orthogonal frequency division multiplexing system, and provides a reconfiguration solution for SR resource position information of a scheduling request in a power communication system.
Drawings
FIG. 1 is a schematic diagram of a distribution of frequency resources in a 230MHz frequency band of a power network according to an embodiment of the present invention;
FIG. 2 is a diagram illustrating a radio frame structure in a communication system according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a ue performing intra-cell subband switching according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a network device according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a ue according to an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The power communication network is developed to ensure safe and stable operation of the power system. The system is combined with a relay protection and safety and stability control system and a dispatching automation system of a power system to be called as three major pillars for safe and stable operation of the power system. At present, the method is the basis of power grid dispatching automation, network operation marketization and management modernization; is an important means for ensuring the safe, stable and economic operation of the power grid; is an important infrastructure of power systems. Because the power communication network has strict requirements on the reliability of communication, the rapidity and the accuracy of protection control information transmission, and the power department has special resource advantages for developing communication, the power companies of most countries in the world establish the power system private communication network mainly by self-construction.
Scheduling Request (SR) is a way for a UE to Request resources from a base station (Evolved Node B, eNodeB, i.e. Evolved Node B is abbreviated as eNB, and the name of the base station in LTE) for new data transmission. The scheduling request process of the current LTE system mainly includes: the UE in the online state can periodically allocate SR resources in uplink resources; if the UE needs to initiate uplink data transmission, the UE initiates an SR to the eNodeB, and after the eNodeB receives the SR, the UE initiating the SR is scheduled so that the UE starts to transmit uplink data.
The power communication network has many similarities with the LTE system and the Narrow-Band Internet of Things (NB-IoT) based on cellular, but also has the characteristics of the power system, and the power system is an orthogonal frequency division multiplexing system. Based on the power communication system, the single-subband frame structure design of the 230MHz frequency band power network system is shown in FIG. 2, and SR occupies 4 symbols in a radio frame and is positioned in the last 4 symbols of subframe 1, so that UE does not need to know the SR transmission subframe number. Specifically, in the system, a radio frame is 25ms in length, and includes 5 subframes of 5ms, each subframe including 9 OFDM symbols. The uplink and downlink resources are planned according to the characteristics of the uplink and downlink services of the system. The downlink resource is 13 symbols, which are 9 symbols of the subframe 0 and the first 4 symbols of the subframe 1. The uplink resource includes the last 4 symbols of the subframe 1, and the subframe 2, the subframe 3, and the subframe 4, where if an SR is configured on a certain radio frame, the SR is the last 4 symbols of the subframe 1. The radio frame structure of all embodiments of the present invention as shown in fig. 2 will not be described again.
The embodiment of the invention provides an indicating method for subband switching in an orthogonal frequency division multiplexing system, aiming at solving the problem that after a network side configures SR resources to a user side in the existing power communication network, the SR resources need to be adjusted because user equipment performs subband switching in a cell, and the indicating method comprises the following steps:
when the network side determines that the user equipment performs intra-cell subband switching, the network side sends subband switching information to the user equipment through RRC signaling or DCI information, so that a working subband is switched for the user equipment and SR resources are reconfigured.
The execution main body of the network side in the communication system is the base station
(eNodeB or eNB). The user equipment can be various wired terminals or wireless terminals in a communication system, such as a mobile phone, a tablet, a computer, a communication module in an ammeter and the like. The UE in this document refers to the UE according to the embodiment of the present invention, and the UE may be replaced with each other in context semantics.
The embodiment of the invention provides an indication method for subband switching in an orthogonal frequency division multiplexing system based on a power communication network, which is used for requesting SR resources for original scheduling of user equipment, when subband switching in a cell is to occur, a network side switches working subbands for the user equipment through RRC signaling or DCI information and reconfigures SR resource position information in the SR resources, so that subband switching scenes can be flexibly adapted under the condition of not influencing data transmission of single subband UE.
Specifically, the embodiment of the present invention provides two ways to reconfigure the SR resource of the UE, including a first way and a second way.
The first mode is as follows: and the network side sends the sub-band switching information to the user equipment through RRC signaling.
The second mode is as follows: the network side sends the sub-band switching information to the user equipment through the DCI information, as shown in fig. 3.
The sub-band switching information comprises sub-band information indication, C-RNTI value and SR indication; the subband information indication is used for indicating the subband number of the UE to be switched to a new subband; the C-RNTI value is a new C-RNTI value reconfigured for the UE by the network side; the SR indication is SR resource location information that the network side reconfigures for the UE.
The embodiment of the invention provides two SR resources, including a UE-dedicated SR resource and a fast scheduling SR resource. When the subband switching in the cell occurs, the fast scheduling SR resource is not influenced, and only the special SR resource of the UE is influenced. Therefore, the SR resource location information in the embodiment of the present invention refers to SR resource location information of an SR resource dedicated to the UE.
The DCI is fully called Downlink Control Information, is carried by a Physical Downlink Control Channel (PDCCH), and is used for an eNodeB to send Downlink Control Information to UE, wherein the Downlink Control Information comprises uplink and Downlink resource allocation, hybrid automatic repeat request (HARQ) Information, power Control, subband switching and the like. The RRCConnectionReconfiguration message is an RRC signaling message.
Since the SR resource reconfiguration information on the network side is the reconfiguration of the UE configured with the SR resource, the basic data of the configuration is still the configuration information of the original SR resource.
In one embodiment, the configuration information of the SR resource includes part or all of the following parameters: SR user resident factor SR-resettf, SR repetition factor SR-NumRepetitionfactor, SR maximum transmission times dsr-TransMax, UE special SR configuration information and fast-tuning SR configuration information;
the SR user dwell factor SR-persistent F is used for indicating the time interval of SR resources on each sub-band in a cell;
the SR repetition factor SR-NumRepetitionfactor is used for indicating the repetition frequency of the SR transmission;
the SR maximum transmission time dsr-TransMax is used for indicating the maximum time for SR transmission;
the UE-specific SR configuration information is a configuration parameter of a specific scheduling request resource sent by a network side to the UE, and includes setting up a UE-specific SR configuration and/or releasing the UE-specific SR configuration, where the setting up the UE-specific SR configuration includes SR resource location information;
the fast scheduling SR configuration information is a configuration parameter of a scheduling request resource sending resource pre-allocated by a network side for a user equipment performing a fast scheduling mode transmission service, and includes a configuration for establishing a fast scheduling SR and/or a configuration for releasing the fast scheduling SR, where the configuration for establishing the fast scheduling SR includes SR resource location information.
The above parameters include SR user residence factor SR-residentF, UE-specific SR configuration information, and fast-tune SR configuration information, which are all configured to the user equipment UE by the network side, i.e. the base station eNodeB.
In all embodiments of the invention, in order to be compatible with single sub-band UE and optimize the reasonable utilization of sub-band resources, the SR resources are divided into the SR resources special for the UE and the SR resources for fast scheduling.
The UE-specific SR resource is a resource allocated by the network side to the UE for transmitting a specific scheduling request, and the resource is periodically valid. The fast scheduling SR resource is a resource that is planned in advance by the network side for the UE that performs the fast scheduling mode service transmission to send the SR, and the resource can be used only when the condition that the UE performs the service transmission in the fast scheduling mode is satisfied, and it can also be called as the fast scheduling SR resource, and the resource is event-type periodic and effective.
The fast scheduling mode refers to that when a network side schedules the UE, the network side allocates resources to other subbands (i.e., non-resident subbands) of the UE because the resident subband where the UE is located is performing data transmission, and the UE performs service data transmission on the non-resident subband indicated by the scheduling. Therefore, the UE can be ensured to transmit data in time, and system resources can be better and reasonably utilized.
In all embodiments of the invention, the repeated sending of the SR belongs to one-time SR transmission; the SR resource location information is a parameter related to a SR resource sending location configured for the UE, and is not described herein again.
In an alternative embodiment, the SR resource location information comprises an SR offset srOffset specifying an offset of an SR resource location on one subband; or
The SR resource location information comprises SR frame offset srFrameOffset and index C of code used for sending SRindexThe SR frame offset srFrameOffset is used to specify the system frame offset of SR in the time interval with SR-residual F1 s as length, the index C of the code used to send SRindexAnd indicating a code used for transmitting the SR to the user equipment in an index mode, wherein SR-resetF is an SR user residence factor.
In an optional embodiment, the first mode that the network side sends the sub-band switching information to the user equipment through RRC signaling further includes:
and the network side carries a sub-band switching configuration cell sub-band _ HO _ configuration through an RRCConnectionReconfiguration message and sends the sub-band switching configuration cell sub-band _ HO _ configuration to the user equipment, thereby switching the working sub-band for the user equipment and reconfiguring SR resource position information.
Specifically, the cell sub-band _ HO _ Config includes a sub-band information indication, a C-RNTI value and an SR indication, wherein the SR indication includes an SR offset srOffset, or the SR indication includes an SR frame offset srFrameOffset and an index C of a code used for sending SRindex。
Further, the network side sends RRCConnectionReconfiguration message carrying subband switching configuration cell through PDSCH.
Specifically, a network side sends DCI format package DCI containing downlink scheduling information on a monitoring subband where user equipment is located through a PDCCH, and the DCI is scrambled jointly by a subband number corresponding to a resident subband where the user equipment is located and an original C-RNTI of the user equipment.
User Equipment (UE) detects a Physical Downlink Control Channel (PDCCH), and demodulates a Physical Downlink Shared Channel (PDSCH) corresponding to the PDCCH; finally, the sub-band switching information is obtained.
In one embodiment, the second method that the network side sends the subband switching information to the user equipment through the DCI information further includes:
and the network side packages DCI through a preset sub-band switching special downlink control information DCI format on a physical downlink control channel PDCCH, and sends the DCI which is jointly scrambled and packaged by a sub-band number corresponding to a resident sub-band where the user equipment is located and the original C-RNTI of the user equipment, thereby indicating the user equipment to switch a working sub-band and reconfiguring SR resource position information.
And the user equipment UE detects the PDCCH and successfully analyzes the DCI to obtain the sub-band switching information.
In the embodiment of the invention, when the network side determines that the user equipment carries out intra-cell subband switching, the SR resource of the UE can be reconfigured through the RRC signaling message, and the SR resource of the UE can also be reconfigured through the DCI information. In either way, the indication parameters carried by the two modes are the same and comprise a sub-band information indication, a C-RNTI value and an SR indication.
The C-RNTI is a cell radio Network Temporary Identifier, is a dynamic Identifier allocated to the UE by a base station, uniquely identifies the UE under a cell air interface, and is only effective if the UE is in a connected state.
When the SR resource of the UE is reconfigured through the DCI information, the sub-band information indication is also called a sub-band information indication domain, the C-RNTI value is also called a C-RNTI value domain, and the SR indication is also called an SR indication domain.
Wherein the SR indication has different meaning under different signaling implementations. The method comprises a first SR indication method and a second SR indication method corresponding to the implementation mode of the network side for the configuration information of the SR resources.
The SR indication method comprises the following steps:
when the SR resource location information comprises SR offset srOffset, the SR indication is SR offset srOffset of SR resources on one sub-band; in other words, when SR resource location information is configured in the first location information manner or the third location information manner according to the embodiment of the present invention, the SR indication is SR offset srOffset of an SR resource on one subband.
This condition is referred to as SR indication method one, and in the SR indication method, because the intra-cell subband switching is performed, the SR user residence factor SR-residenf parameter is not re-indicated in the DCI information, and the value of the SR-residenf parameter configured before is directly used.
SR indication method two:
when the SR resource location information includes SR frame offset srFrameOffset and index C of code used for sending SRindexAnd the SR indication is SR frame offset of SR resources on one subband and an index of a code used for transmitting SR. In other words, when SR resource location information is configured by the second location information method or the fourth location information method according to the embodiment of the present invention, the SR indication is an SR resource on one subbandSource SR frame offset and index of the code used to transmit the SR.
This condition is referred to as SR indication method two, and in SR indication method two, because it is intra-cell subband switching, the SR user residence factor SR-residenf parameter is not re-indicated in the SR reconfiguration information, but the value of the SR-residenf parameter configured before is directly used.
Under the condition of the first SR indication method in the embodiment of the present invention, when the SR resource location information includes SR offset srOffset, the network side configures the sub-band information indication, C-RNTI value, and SR indication as a first DCI format or a second DCI format;
the first DCI format includes 24 bits, and specifically includes:
the sub-band information indication occupies 9 bits, the C-RNTI value occupies 7 bits, and the SR indication occupies 8 bits;
the second DCI format includes 28 bits, and specifically includes:
the Flag mark occupies 2 bits, the sub-band information indication occupies 9 bits, the C-RNTI value occupies 7 bits, the SR indication occupies 8 bits, and 2 bits are reserved;
wherein the SR indication is SR offset srOffset of SR resources on one sub-band;
the Flag value comprises a first value, a second value and a third value, wherein the first value represents an uplink grant (UL grant), the second value represents a downlink grant (DL grant), and the third value represents sub-band switching.
Optionally, the first value may be 0, the second value may be 1, and the third value may be 2.
In the embodiment of the invention, the first DCI format and the second DCI format both use the original reserved subband number and the original C-RNTI value of the UE to carry out combined scrambling.
And when the UE detects the RRC signaling or the DCI information of the sub-band switching, the UE jumps to the sub-band of the frequency point corresponding to the sub-band number according to the sub-band number indicated by the sub-band information indication parameter in the RRC signaling or the DCI information of the sub-band switching, updates the value of the srOffset parameter according to the value of the SR offset indication domain in the RRC signaling or the DCI information of the switching, and obtains the updated SR resource position special for the UE according to the original SR-residual F and the updated srOffset. It should be noted that the sub-band switching RRC signaling or DCI information is only to update the UE-specific SR resource location, and the SR repetition number and the maximum transmission number remain unchanged. That is, the modification of the SR repetition number and the maximum transmission number is configured through the RRC message.
In the second SR indicating method according to the embodiment of the present invention, when the SR resource location information includes SR frame offset srFrameOffset and index C of a code used for transmitting SRindexWhen the network side configures the sub-band information indication, the C-RNTI value and the SR indication into a third DCI format or a fourth DCI format;
the third DCI format includes 24 bits, and specifically includes:
the sub-band information indication occupies 9 bits, the C-RNTI value occupies 7 bits, and the SR indication occupies 8 bits;
the fourth DCI format includes 28 bits, and specifically includes:
the Flag mark occupies 2 bits, the sub-band information indication occupies 9 bits, the C-RNTI value occupies 7 bits, the SR indication occupies 8 bits, and 2 bits are reserved;
wherein the SR indication is SR frame offset of SR resource on a sub-band and index C of code used for transmitting SRindexThe value of the SR indication is SR frame offset srFrameOffset 8+ index C of the code used for transmitting SRindex；
The Flag value comprises a first value, a second value and a third value, wherein the first value represents an uplink grant (UL grant), the second value represents a downlink grant (DL grant), and the third value represents sub-band switching.
Optionally, the first value may be 0, the second value may be 1, and the third value may be 2.
When the UE detects sub-band switching RRC signaling or DCI information, the UE jumps to the sub-band of the frequency point corresponding to the sub-band number according to the sub-band number indicated by the sub-band information indication domain in the sub-band switching RRC signaling or DCI information, and calculates the numerical value for updating the srFrameOffset parameter and the numerical value of the SR indication domain in the switching RRC signaling or DCI informationCindexThe value of the parameter, and according to the original sr-residentF and the updated srFrameOffset and CindexAnd obtaining the updated UE-specific SR resource location. It should be noted that the sub-band switching RRC signaling or DCI information is only to update the UE-specific SR resource location, and the SR repetition number and the maximum transmission number remain unchanged. That is, the modification of the SR repetition number and the maximum transmission number is configured through the RRC message.
In addition, the SR frame offset srFrameOffset and the index C of the code used to transmit the SRindexThe SR indication may also be designed separately in RRC signaling or DCI information, such as an SR frame offset indication and an indication of the index of the code used to transmit the SR. The embodiment of the invention is not described in detail.
The embodiment of the invention also provides an indication method for subband switching in an orthogonal frequency division multiplexing system, which comprises the following steps:
if the user equipment receives the sub-band switching information sent by the network side, the user equipment performs intra-cell sub-band switching, and reconfigures the current SR resource position information according to the sub-band switching information after the sub-band switching is completed; wherein the SR resource location information comprises a sub-band information indication, a C-RNTI value and an SR indication.
The subband information indication is used for indicating the subband number of the UE to be switched to a new subband; the C-RNTI value is a new C-RNTI value reconfigured for the UE by the network side; the SR indication is SR resource location information that the network side reconfigures for the UE.
The embodiment of the invention relates to a user side processing method corresponding to the network side processing, and the execution main body is user equipment. And after the network side sends the sub-band switching information to the user side, the user side reconfigures the current SR resource according to the sub-band switching information so as to adapt to the sub-band switching scene in the cell.
Corresponding to the network side method, when the network side sends the sub-band switching information through RRC signaling, the user equipment acquires the sub-band switching information through the RRC signaling; and when the network side sends the sub-band switching information through the DCI information, the user equipment acquires the sub-band switching information through the DCI information.
Since the sub-band switching information of the network side is the reconfiguration of the UE configured with the SR resource, the basic data of the configuration is still the configuration information of the original SR resource. For the specific description of the configuration information of the SR resource, the SR resource location thereof, and each parameter in the SR resource reconfiguration information, reference is made to the related description of the network side, which is not repeated herein.
In an embodiment, the reconfiguring the current SR resource according to the SR resource reconfiguration information includes performing a first process or a second process according to the SR resource reconfiguration information;
the first process includes:
the user equipment jumps to the sub-band of the corresponding frequency point according to the sub-band number indicated by the sub-band information, updates SR offset srOffset according to the numerical value indicated by the SR, and obtains an updated special SR resource position for the UE according to the original SR-identifying F and the updated srOffset;
the second process includes:
the user equipment jumps to the sub-band of the corresponding frequency point according to the sub-band number indicated by the sub-band information, and updates the srFrameOffset parameter and the C according to the numerical value indicated by the SRindexParameters according to the original sr-identifying F and the updated srFrameOffset parameters and CindexThe parameters get the updated UE-specific SR resource locations.
In one embodiment, the first process satisfies the following two equations:
SFN mod(sr-residentF*40)＝a；
Cindex＝srOffset mod 8；
wherein SFN is the radio frame number of the SR resource,
Figure BDA0001375535010000131
for b, when PHYCellID mod n is 0, b is n; when PHYCellID mod n is not equal to 0, b is PHYCellID mod n, PHYCellID is the physical cell ID of the cell where the user equipment is located, n is the multiplexing factor, SR-residenTF is SR user residence factor SR-residenF, and srOffset is SR offset srOffset.
In the embodiment of the invention, one sub-bandThe SR resource on one radio frame may support 8 UEs to report an SR. According to the SR user residence factor SR-residual F, the total resource number N of the SR on each subband can be calculated according to the formula (1)SR-subbandThat is, the number of UEs supporting the SR resource configuration at most on each subband in a certain cell, where equation (1) is:
NSR-subband＝sr-residentF*40/(n+1)*8 (1)
wherein n is a multiplexing factor given by considering the influence of the same frequency interference among cells. The deviation amount of the SR resource position on one sub-band is indicated through SR deviation srOffset, and the value range of SR is [0, NSR-subband-1]。
The UE determines the position for sending the SR resource according to the physical cell ID, SR-identifying F and srOffset of the cell in which the UE is located, namely the SR resource corresponding to the UE has an SR resource position indicated by srOffset in a time interval with SR-identifying F1 s as the length.
Specifically, the index of the code used for transmitting the SR is C, where the SR resource configured by the UE is located in the radio frame number SFNindex. The specific calculation formula is as follows:
SFN mod(sr-residentF*40)＝a (2)
Cindex＝srOffset mod 8 (3)
wherein the content of the first and second substances,
Figure BDA0001375535010000141
for b, when PHYCellID mod n is 0, b is n; when PHYCellID mod n is not equal to 0, b is PHYCellID mod n, PHYCellID is the physical cell ID of the cell where the UE is located, and n is a multiplexing factor given by considering the influence of the inter-cell co-channel interference. SR-residentF is SR user residency factor SR-residentF, srOffset is SR offset srOffset. In other words, a radio frame satisfying the above formula condition can be used to transmit the SR.
Therefore, the UE can acquire the SR resource position information according to the sub-band switching information indicated by the network side.
In one embodiment, the second process satisfies the following equation:
SFN mod(sr-residentF*40)＝srFrameOffset；
wherein SFN is the radio frame number of the SR resource, SR-residenTF is the SR user dwell factor SR-residenTF, srFrameOffset is the SR frame offset srFrameOffset, CindexIndex C of code used for transmitting SRindex。
In the embodiment of the invention, the SR resource on a radio frame on a sub-band can support 8 UEs to report the SR, and the UEs are indicated and distinguished by sending the index of the code used by the SR.
UE according to srFrameOffset and CindexTo further determine where the UE itself may be used to transmit SR resources. Specifically, the radio frame number SFN where the SR resource configured by the UE is located. The calculation formula is as follows:
SFN mod(sr-residentF*40)＝srFrameOffset (4)
wherein, sr-resedentf and srFrameOffset are network side configuration parameters. In other words, a radio frame satisfying the above formula condition can be used to transmit the SR.
Index C of code used for transmitting SRindexAnd configuring parameters for the network side. Thus, the UE can obtain the location of the SR resource configured for it by the network side.
The embodiments of the SR resource reconfiguration method of the user side correspond to the method of the network side, and the reconfiguration of the SR resource is realized by the mutual cooperation of the user side and the network side.
The embodiment of the invention also provides network equipment, which comprises an SR resource reconfiguration module;
the SR resource reconfiguration module is configured to, when the network side determines that the user equipment performs intra-cell subband switching, send subband switching information to the user equipment through RRC signaling or DCI information, so as to switch a working subband for the user equipment and reconfigure SR resource location information;
the sub-band switching information comprises sub-band information indication, C-RNTI value and SR indication; the subband information indication is used for indicating the subband number of the UE to be switched to a new subband; the C-RNTI value is a new C-RNTI value reconfigured for the UE by the network side; the SR indication is SR resource location information that the network side reconfigures for the UE.
The network device according to the embodiment of the present invention is configured to implement the method for indicating subband switching at the network side according to the embodiment of the present invention, and this embodiment and the following embodiments correspond to the method for indicating subband switching at the network side one to one, and for specific description of each embodiment, reference is made to the method for indicating subband switching at the network side, which is not described herein again.
In one embodiment, the configuration information of the SR resource includes part or all of the following parameters: SR user resident factor SR-resettf, SR repetition factor SR-NumRepetitionfactor, SR maximum transmission times dsr-TransMax, UE special SR configuration information and fast-tuning SR configuration information;
the SR user dwell factor SR-persistent F is used for indicating the time interval of SR resources on each sub-band in a cell;
the SR repetition factor SR-NumRepetitionfactor is used for indicating the repetition frequency of the SR transmission;
the SR maximum transmission time dsr-TransMax is used for indicating the maximum time for SR transmission;
the UE-specific SR configuration information is a configuration parameter of a specific scheduling request resource sent by a network side to the UE, and includes setting up a UE-specific SR configuration and/or releasing the UE-specific SR configuration, where the setting up the UE-specific SR configuration includes SR resource location information;
the fast scheduling SR configuration information is a configuration parameter of a scheduling request resource sending resource pre-allocated by a network side for a user equipment performing a fast scheduling mode transmission service, and includes a configuration for establishing a fast scheduling SR and/or a configuration for releasing the fast scheduling SR, where the configuration for establishing the fast scheduling SR includes SR resource location information.
In one embodiment, the SR resource location information comprises an SR offset srOffset specifying an offset of an SR resource location on one subband; or
The SR resource location information comprises SR frame offset srFrameOffset and index C of code used for sending SRindexThe SR frame offset srFrameOffset is used to specify that the SR is within a time interval of length SR-resentf 1sThe system frame offset of (1), the index C of the code used for transmitting the SRindexAnd the code used for transmitting the SR is indicated to the user equipment in an index mode.
In one embodiment, the SR resource reconfiguration module includes an RRC reconfiguration unit or a DCI reconfiguration unit;
the RRC reconfiguration unit is configured to, by the network side, carry a Subband switching configuration cell Subband _ HO _ configuration through an RRCConnectionReconfiguration message and send the Subband switching configuration cell Subband _ HO _ configuration to the user equipment, so as to switch subbands and reconfigure SR resource location information for the user equipment;
and the DCI reconfiguration unit is used for a network side to package DCI on a Physical Downlink Control Channel (PDCCH) through a preset sub-band switching special downlink control information DCI format, and sends the DCI which is jointly scrambled and packaged by a sub-band number corresponding to a resident sub-band where the user equipment is located and an original C-RNTI of the user equipment, so that a working sub-band is switched for the user equipment and SR resource position information is reconfigured.
In one embodiment, when the SR resource location information comprises SR offset srOffset, the network side configures the subband information indication, C-RNTI value and SR indication as a first DCI format or a second DCI format;
the first DCI format includes 24 bits, and specifically includes:
the sub-band information indication occupies 9 bits, the C-RNTI value occupies 7 bits, and the SR indication occupies 8 bits;
the second DCI format includes 28 bits, and specifically includes:
the Flag mark occupies 2 bits, the sub-band information indication occupies 9 bits, the C-RNTI value occupies 7 bits, the SR indication occupies 8 bits, and 2 bits are reserved;
wherein the SR indication is SR offset srOffset of SR resources on one sub-band;
the Flag value comprises a first value, a second value and a third value, wherein the first value represents an uplink grant (UL grant), the second value represents a downlink grant (DL grant), and the third value represents sub-band switching.
At one isIn an embodiment, when the SR resource location information includes SR frame offset srFrameOffset and index C of a code used for transmitting SRindexWhen the network side configures the sub-band information indication, the C-RNTI value and the SR indication into a third DCI format or a fourth DCI format;
the third DCI format includes 24 bits, and specifically includes:
the sub-band information indication occupies 9 bits, the C-RNTI value occupies 7 bits, and the SR indication occupies 8 bits;
the fourth DCI format includes 28 bits, and specifically includes:
the Flag mark occupies 2 bits, the sub-band information indication occupies 9 bits, the C-RNTI value occupies 7 bits, the SR indication occupies 8 bits, and 2 bits are reserved;
wherein the SR indication is SR frame offset of SR resource on a sub-band and index C of code used for transmitting SRindexThe value of the SR indication is SR frame offset srFrameOffset 8+ index C of the code used for transmitting SRindex；
The Flag value comprises a first value, a second value and a third value, wherein the first value represents an uplink grant (UL grant), the second value represents a downlink grant (DL grant), and the third value represents sub-band switching.
The invention also provides user equipment, which comprises an SR resource reconfiguration processing module;
the SR resource reconfiguration processing module is configured to, if the user equipment receives subband switching information sent by the network side, perform intra-cell subband switching by the user equipment, and reconfigure current SR resource location information according to the subband switching information after completing subband switching; wherein the SR resource reconfiguration information comprises a sub-band information indication, a C-RNTI value and an SR indication. .
The user equipment according to the embodiment of the present invention is configured to implement the method for indicating subband switching at the user side according to the embodiment of the present invention, and this embodiment and the following embodiments correspond to the method for indicating subband switching at the user side one to one, and for specific description of each embodiment, reference is made to the method for indicating subband switching at the user side, which is not described herein again.
In one embodiment, the SR resource reconfiguration processing module comprises a first processing unit or a second processing unit;
the first processing unit is configured to:
the user equipment jumps to the sub-band of the corresponding frequency point according to the sub-band number indicated by the sub-band information, updates SR offset srOffset according to the numerical value indicated by the SR, and obtains an updated special SR resource position for the UE according to the original SR-identifying F and the updated srOffset;
the second processing unit is configured to:
the user equipment jumps to the sub-band of the corresponding frequency point according to the sub-band number indicated by the sub-band information, and updates the srFrameOffset parameter and the C according to the numerical value indicated by the SRindexParameters according to the original sr-identifying F and the updated srFrameOffset parameters and CindexThe parameters get the updated UE-specific SR resource locations.
Fig. 4 is a schematic structural diagram of a network device according to an embodiment of the present invention.
Referring to fig. 4, the network device includes: a processor (processor)801, a memory (memory)802, and a bus 803;
wherein, the processor 801 and the memory 802 complete communication with each other through the bus 803;
the processor 801 is configured to call program instructions in the memory 802 to perform the methods provided by the above-described method embodiments, including for example: when a network side determines that user equipment performs intra-cell subband switching, the network side sends subband switching information to the user equipment through RRC signaling or DCI information so as to indicate the user equipment to switch a working subband and reconfigure SR resource position information; the sub-band switching information comprises sub-band information indication, C-RNTI value and SR indication; the subband information indication is used for indicating the subband number of the UE to be switched to a new subband; the C-RNTI value is a new C-RNTI value reconfigured for the UE by the network side; the SR indication is SR resource location information that the network side reconfigures for the UE.
Another embodiment of the present invention discloses a computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the methods provided by the above-mentioned method embodiments, for example, including: when a network side determines that user equipment performs intra-cell subband switching, the network side sends subband switching information to the user equipment through RRC signaling or DCI information so as to indicate the user equipment to switch a working subband and reconfigure SR resource position information; the sub-band switching information comprises sub-band information indication, C-RNTI value and SR indication; the subband information indication is used for indicating the subband number of the UE to be switched to a new subband; the C-RNTI value is a new C-RNTI value reconfigured for the UE by the network side; the SR indication is SR resource location information that the network side reconfigures for the UE.
Another embodiment of the invention provides a non-transitory computer-readable storage medium storing computer instructions that cause the computer to perform a method provided by the above method embodiments, for example, comprising: when a network side determines that user equipment performs intra-cell subband switching, the network side sends subband switching information to the user equipment through RRC signaling or DCI information so as to indicate the user equipment to switch a working subband and reconfigure SR resource position information; the sub-band switching information comprises sub-band information indication, C-RNTI value and SR indication; the subband information indication is used for indicating the subband number of the UE to be switched to a new subband; the C-RNTI value is a new C-RNTI value reconfigured for the UE by the network side; the SR indication is SR resource location information that the network side reconfigures for the UE.
Fig. 5 shows a schematic structural diagram of a user equipment according to an embodiment of the present invention.
Referring to fig. 5, the user equipment includes: a processor (processor)901, a memory (memory)902, and a bus 903;
wherein, the processor 901 and the memory 902 complete the communication with each other through the bus 903;
the processor 901 is configured to call program instructions in the memory 902 to perform the methods provided by the above-mentioned method embodiments, for example, including: if the user equipment receives the sub-band switching information sent by the network side, the user equipment performs intra-cell sub-band switching, and reconfigures the current SR resource position information according to the sub-band switching information after the sub-band switching is completed; wherein the SR resource location information comprises a sub-band information indication, a C-RNTI value and an SR indication.
Another embodiment of the present invention discloses a computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the methods provided by the above-mentioned method embodiments, for example, including: if the user equipment receives the sub-band switching information sent by the network side, the user equipment performs intra-cell sub-band switching, and reconfigures the current SR resource position information according to the sub-band switching information after the sub-band switching is completed; wherein the SR resource location information comprises a sub-band information indication, a C-RNTI value and an SR indication.
Another embodiment of the invention provides a non-transitory computer-readable storage medium storing computer instructions that cause the computer to perform a method provided by the above method embodiments, for example, comprising: if the user equipment receives the sub-band switching information sent by the network side, the user equipment performs intra-cell sub-band switching, and reconfigures the current SR resource position information according to the sub-band switching information after the sub-band switching is completed; wherein the SR resource location information comprises a sub-band information indication, a C-RNTI value and an SR indication.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
The above-described embodiments of a network device and a user equipment are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, the method of the present application is only a preferred embodiment and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. A method for indicating sub-band switching in an orthogonal frequency division multiplexing system is characterized by comprising the following steps:
when a network side determines that user equipment performs intra-cell subband switching, the network side sends subband switching information to the user equipment through Radio Resource Control (RRC) signaling or Downlink Control Information (DCI), so that the user equipment is instructed to switch working subbands and the Scheduling Request (SR) resource position information is reconfigured;
the sub-band switching information comprises sub-band information indication, a cell radio network temporary identifier C-RNTI value and SR indication; the subband information indication is used for indicating the subband number of the UE to be switched to a new subband; the C-RNTI value is a new C-RNTI value reconfigured for the UE by the network side; the SR indication is SR resource location information that the network side reconfigures for the UE;
the SR resource position information comprises SR offset srOffset, wherein the SR offset srOffset is used for specifying the offset of the SR resource position on one subband; or
The SR resource location information comprises SR frame offset srFrameOffset and index C of code used for sending SRindexThe SR frame offset srFrameOffset is used to specify the system frame offset of SR in the time interval with SR-residual F1 s as length, the index C of the code used to send SRindexThe code used for sending the SR is indicated to the user equipment in an index mode, wherein SR-resetF is an SR user residence factor;
the network side sends the sub-band switching information to the user equipment through the DCI, and further comprises:
a network side packages DCI through a preset sub-band switching special downlink control information DCI format on a physical downlink control channel PDCCH, and sends the DCI which is jointly scrambled and packaged by a sub-band number corresponding to a resident sub-band where user equipment is located and an original C-RNTI of the user equipment, thereby indicating the user equipment to switch a working sub-band and reconfiguring SR resource position information;
when the SR resource position information comprises SR offset srOffset, the network side configures the sub-band information indication, the C-RNTI value and the SR indication into a first DCI format or a second DCI format;
the first DCI format includes 24 bits, and specifically includes:
the sub-band information indication occupies 9 bits, the C-RNTI value occupies 7 bits, and the SR indication occupies 8 bits;
the second DCI format includes 28 bits, and specifically includes:
the Flag mark occupies 2 bits, the sub-band information indication occupies 9 bits, the C-RNTI value occupies 7 bits, the SR indication occupies 8 bits, and 2 bits are reserved;
wherein the SR indication is SR offset srOffset of SR resources on one sub-band;
the Flag value comprises a first value, a second value and a third value, wherein the first value represents an uplink grant (UL grant), the second value represents a downlink grant (DL grant), and the third value represents sub-band switching.
2. The method of claim 1, wherein the network side sends the subband switching information to the user equipment through RRC signaling, further comprising:
and the network side carries a sub-band switching configuration cell sub-band _ HO _ Configuration through RRC connection reconfiguration message and sends the sub-band switching configuration cell sub-band _ HO _ Configuration to the user equipment, thereby switching working sub-bands for the user equipment and reconfiguring SR resource position information.
3. The method of claim 2, wherein the information element sub band HO Config comprises a Subband information indication, a C-RNTI value, and an SR indication, wherein the SR indication comprises an SR offset srOffset, or the SR indication comprises an SR frame offset srFrameOffset and an index C of a code used to send an SRindex。
4. The method of claim 1, wherein the SR resource location information includes an SR frame offset srFrameOffset and an index C of a code used for transmitting the SRindexWhen the network side configures the sub-band information indication, the C-RNTI value and the SR indication into a third DCI format or a fourth DCI format;
the third DCI format includes 24 bits, and specifically includes:
the sub-band information indication occupies 9 bits, the C-RNTI value occupies 7 bits, and the SR indication occupies 8 bits;
the fourth DCI format includes 28 bits, and specifically includes:
the Flag mark occupies 2 bits, the sub-band information indication occupies 9 bits, the C-RNTI value occupies 7 bits, the SR indication occupies 8 bits, and 2 bits are reserved;
wherein the SR indication is SR frame offset of SR resource on a sub-band and index C of code used for transmitting SRindexThe value of the SR indication is SR frame offset srFrameOffset 8+ index C of the code used for transmitting SRindex；
The Flag value comprises a first value, a second value and a third value, wherein the first value represents an uplink grant (UL grant), the second value represents a downlink grant (DL grant), and the third value represents sub-band switching.
5. A method for indicating sub-band switching in an orthogonal frequency division multiplexing system is characterized by comprising the following steps:
if the user equipment receives sub-band switching information sent by a network side, the user equipment performs intra-cell sub-band switching, and reconfigures the position information of the current scheduling request SR resource according to the sub-band switching information after the sub-band switching is completed; the sub-band switching information comprises sub-band information indication, a cell radio network temporary identifier C-RNTI value and SR indication;
reconfiguring the current SR resource location information according to the sub-band switching information, wherein the reconfiguring comprises performing first processing or second processing according to the SR resource location information;
the first process includes:
the user equipment jumps to the sub-band of the corresponding frequency point according to the sub-band number indicated by the sub-band information, updates SR offset srOffset according to the numerical value indicated by the SR, and obtains updated SR resource position information according to the original SR-identifying F and the updated srOffset, wherein the SR-identifying F is an SR user resident factor;
the second process includes:
the user equipment jumps to the sub-band of the corresponding frequency point according to the sub-band number indicated by the sub-band information, and updates the srFrameOffset parameter and the C according to the numerical value indicated by the SRindexParameters according to the original sr-identifying F and the updated srFrameOffset parameters and CindexThe parameter is updated SR resource positionInformation;
the first process satisfies the following two equations:
SFN mod(sr-residentF*40)＝a；
Cindex＝srOffset mod 8；
wherein SFN is the radio frame number of the SR resource,
Figure FDA0002904552490000041
for b, when PHYCellID mod n is 0, b is n; when PHYCellID mod n is not equal to 0, b is PHYCellID mod n, PHYCellID is the physical cell ID of the cell where the user equipment is located, n is a multiplexing factor, SR-residenTF is SR user residence factor SR-residenF, and srOffset is SR offset srOffset;
the second process satisfies the following equation:
SFN mod(sr-residentF*40)＝srFrameOffset；
wherein SFN is the radio frame number of the SR resource, SR-residenTF is the SR user dwell factor SR-residenTF, srFrameOffset is the SR frame offset srFrameOffset, CindexIndex C of code used for transmitting SRindex。
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