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

Abstract

Embodiments of the present invention provide a method for subband switching in an orthogonal frequency division multiplexing system. The method includes: when the network side decides 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, thereby instructing the user equipment to switch the working subband and reconfigure the SR. resources; wherein, the subband switching information includes subband information indication, C-RNTI value and SR indication. The embodiment of the present invention provides a solution for scheduling request SR resource reconfiguration in a power communication system. The network side indicates subband switching to the user equipment through RRC signaling or DCI information, and the user equipment receives the RRC signaling or DCI information. Then perform subband switching and reconfigure SR resources.

Description

An Indication Method for Subband Switching in Orthogonal Frequency Division Multiplexing System

technical field

The present invention relates to the field of communication technologies, and more particularly, to an indication method for subband switching in an orthogonal frequency division multiplexing system.

Background technique

In a broadband access system, the available bandwidth of the system is divided into a plurality of consecutive or non-consecutive subbands, and each subband is transmitted using an orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) technology. The subbands are divided into synchronization subbands and common subbands according to their functions. The synchronization subbands are mainly used for uplink and downlink synchronization and broadcast channels, and the common subbands are used for normal service transmission.

In order to reduce cost and implementation complexity, User Equipment (UE) can support multi-subband and single-subband working modes, that is, the UE receiver bandwidth does not have to be the entire system bandwidth, it can support receiving multiple or single subbands, and does not All subbands must be received. Depending on the hardware capabilities, the UE supports working on all or part of the subbands, with the simplest (ie low cost) UE supporting working on a single subband. In this way, the requirement on the bandwidth of the UE receiver is reduced, and the requirement on the hardware capability of the system is also reduced.

The power load monitoring communication network is a typical application scenario, and its spectrum is discretely distributed in the 230M frequency band. Figure 1 shows a schematic diagram of the distribution of frequency resources in the 230MHz frequency band of the network. It can be seen from the figure that its spectrum is comb-shaped, and the frequency resources of this frequency band can be divided into several subbands, the subband of the lowest frequency point is 223.525MHz, and the subband of the highest frequency point is 231.65MHz.

For the UE to support the single subband working mode, the Downlink Control Information (DCI) carried on the Downlink Control Channel (PDCCH) must be sent independently on each subband, otherwise the single subband UE cannot be due to the limitation of the receiver bandwidth. Monitor the PDCCH. Therefore, it is necessary to design a system scheme according to the characteristics of frequency resources in the 230MHz frequency band, the requirements of single-subband UE working mode and the requirements of coverage. For the existing scheduling request SR resource allocation method, when subband switching occurs in the cell, it is also necessary to Furthermore, a solution to the problem of scheduling request SR resource reconfiguration is given.

SUMMARY OF THE INVENTION

The present invention provides a scheduling request reconfiguration method in an orthogonal frequency division multiplexing system that overcomes the above problems or at least partially solves the above problems.

According to an aspect of the present invention, there is provided an indication method for subband switching in an OFDM system, including:

When the network side decides 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, thereby instructing the user equipment to switch the working subband and reconfigure the SR resource location information;

Wherein, the subband switching information includes subband information indication, C-RNTI value and SR indication; the subband information indication is used to indicate the subband number that the UE is to switch to a new subband; the C-RNTI The value is the new C-RNTI value reconfigured by the network side for the UE; the SR indication is the SR resource location information reconfigured by the network side for the UE.

According to another aspect of the present invention, a method for indicating subband switching in an OFDM system is also provided, including:

If the user equipment receives the subband switching information sent by the network side, the user equipment performs intra-cell subband switching, and reconfigures the current SR resource location information according to the subband switching information after completing the subband switching; The SR resource location information includes subband information indication, C-RNTI value and SR indication.

The embodiment of the present invention provides an indication method for subband switching in an orthogonal frequency division multiplexing system, and provides a reconfiguration solution for SR resource location information of a scheduling request in a power communication system. The network side uses RRC signaling Or the DCI information indicates subband switching to the user equipment, and the user equipment performs subband switching and reconfigures SR resources after receiving the RRC signaling or the DCI information.

Description of drawings

1 is a schematic diagram of frequency resource distribution in the 230MHz frequency band of a power grid according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a radio frame structure in a communication system according to an embodiment of the present invention;

3 is a schematic diagram of intra-cell subband handover performed by a user equipment according to an embodiment of the present invention;

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 user equipment according to an embodiment of the present invention.

Detailed ways

The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. The following examples are intended to illustrate the present invention, but not to limit the scope of the present invention.

The power communication network came into being to ensure the safe and stable operation of the power system. It is collectively called the three pillars of the safe and stable operation of the power system together with the relay protection, safety and stability control system and dispatch automation system of the power system. At present, it is the foundation of grid dispatch automation, network operation marketization and management modernization; it is an important means to ensure the safety, stability and economic operation of the grid; it is an important infrastructure of the power system. Because the power communication network has strict requirements for the reliability of communication, the speed and accuracy of the transmission of protection control information, and the power sector has special resource advantages for developing communication, the power companies in most countries in the world use their own A dedicated communication network for the power system is established in a built-in approach.

A Scheduling Request (SR) is a way for a UE to request resources from a base station (Evolved Node B, eNodeB, ie an evolved Node B for short, eNB, the name of a base station in LTE) for new data transmission. At present, the scheduling request process of the LTE system mainly includes: the online UE will periodically allocate SR resources in the uplink resources; and if the UE wants to initiate uplink data transmission, it must first initiate an SR to the eNodeB, and the eNodeB receives the received After the SR, the UE that initiates 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 cellular-based Narrow Band Internet of Things (NB-IoT), but it also has the characteristics of the power system, which is an orthogonal frequency division multiplexing system. The embodiment of the present invention is based on the power communication system. The single subband frame structure design of the 230MHz frequency band power grid system is shown in Figure 2. In a radio frame, the SR occupies 4 symbols and is located in the last 4 symbols of subframe 1, so the UE does not need to know SR sends the subframe number. Specifically, the length of one radio frame in the system is 25ms, which includes 5 subframes of 5ms, and each subframe has 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 resources are 9 symbols of subframe 0 and the first 4 symbols of subframe 1, a total of 13 symbols. The uplink resources are the last 4 symbols of subframe 1 and subframe 2, subframe 3, and subframe 4. If SR is configured on a certain radio frame, the SR is the last 4 symbols of subframe 1. The radio frame structures of all embodiments of the present invention are shown in FIG. 2 and will not be repeated hereafter.

In order to solve the problem that the SR resources need to be adjusted due to the user equipment performing intra-cell subband switching after the network side configures the SR resources to the user side in the existing power communication network, the embodiments of the present invention provide an orthogonal frequency division multiplexing method. Indication methods for subband switching in the system, including:

When the network side decides 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, thereby switching the working subband and reconfiguring the SR resources for the user equipment.

The execution subject of the network side in the communication system according to the embodiment of the present invention is the base station

(eNodeB or eNB). The user equipment in the present invention may 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 electric meter, and the like. The UE mentioned in this document refers to the user equipment described in the embodiments of the present invention, and the two can be replaced with each other in context semantics.

Based on the power communication network, the embodiment of the present invention proposes an indication method for subband switching in an orthogonal frequency division multiplexing system, and requests SR resources for the original scheduling of the user equipment. The network side switches the working subband for the user equipment through RRC signaling or DCI information and reconfigures the SR resource location information in the SR resource, so that the subband switching scenario can be flexibly adapted without affecting the single-subband UE data transmission .

Specifically, the embodiment of the present invention provides two ways to reconfigure the SR resources of the UE, including the first way and the second way.

The first manner is: the network side sends subband switching information for the user equipment through RRC signaling.

The second manner is: the network side sends the subband switching information to the user equipment through the DCI information, as shown in FIG. 3 .

Wherein, the subband switching information includes subband information indication, C-RNTI value and SR indication; the subband information indication is used to indicate the subband number that the UE is to switch to a new subband; the C-RNTI The value is the new C-RNTI value reconfigured by the network side for the UE; the SR indication is the SR resource location information reconfigured by the network side for the UE.

The embodiment of the present invention provides two kinds of SR resources, including UE-specific SR resources and fast scheduling SR resources. When intra-cell subband handover occurs, it does not affect the fast scheduling SR resources, but only affects the UE-specific SR resources. Therefore, the SR resource location information in the embodiment of the present invention refers to the SR resource location information of the UE-specific SR resource.

The full name of the DCI in the embodiment of the present invention is Downlink Control Information, which is carried by the downlink physical control channel PDCCH, and is used by the eNodeB to send downlink control information to the UE, including uplink and downlink resource allocation, HARQ information, power control, subband switching, and the like. The RRCConnectionReconfiguration message is a kind of RRC signaling message.

Since the SR resource reconfiguration information on the network side is the reconfiguration performed on the UE that has already configured the SR resource, the basic data of its configuration is still the original SR resource configuration information.

In one embodiment, the configuration information of the SR resource includes some or all of the following parameters: SR user residence factor sr-residentF, SR repetition factor sr-NumRepetitionFactor, SR maximum transmission number dsr-TransMax, UE-specific SR Configuration information and quick adjustment SR configuration information;

The SR user resident factor sr-residentF is used to indicate the time interval of SR resources on each subband in a cell;

The SR repetition times factor sr-NumRepetitionFactor is used to indicate the repetition times of sending the SR;

The maximum number of SR transmissions, dsr-TransMax, is used to indicate the maximum number of SR transmissions;

The UE-specific SR configuration information is a configuration parameter of a specific sending scheduling request resource allocated by the network side for the user equipment, including establishing a UE-specific SR configuration and/or releasing a UE-specific SR configuration, wherein the establishing a UE-specific SR configuration The SR configuration contains SR resource location information;

The fast-adjustment SR configuration information is a configuration parameter pre-allocated by the network side for the user equipment that transmits services in the fast-dispatch mode to send scheduling request resources, including establishing a fast-adjustment SR configuration and/or releasing a fast-adjustment SR configuration, wherein, The SR resource location information is included in the establishment and quick adjustment SR configuration.

The above parameters, including the SR user resident factor sr-residentF, the UE-specific SR configuration information and the fast-adjustment SR configuration information, are all configured by the network side, that is, the base station eNodeB, for the user equipment UE.

In all the embodiments of the present invention, in order to be compatible with single-subband UEs and optimize the rational utilization of subband resources, SR resources are divided into UE-specific SR resources and fast-scheduling SR resources.

The UE-specific SR resource is a specific resource allocated by the network side for the UE to send a scheduling request, and the resource is valid periodically. The fast scheduling SR resource is the resource pre-planned by the network side for the UE that transmits the service in the fast scheduling mode to send the SR. This resource can only be used under the conditions that the UE transmits the service in the fast scheduling mode. It can also be called Quickly adjust SR resources, which are event-type periodic and effective.

The fast scheduling mode means that because the resident subband where the UE is located is performing data transmission, the network side will allocate resources to other subbands of the UE (ie, non-resident subbands) when scheduling the UE. Service data transmission is performed on the non-resident subband indicated by the scheduling. In this way, it can not only ensure that the UE performs data transmission in a timely manner, but also make better and rational use of system resources.

In all the embodiments of the present invention, the repeated SR transmission belongs to one SR transmission; the SR resource location information is a related parameter of the SR resource location configured for the UE, which will not be repeated hereafter.

In an optional embodiment, the SR resource location information includes an SR offset srOffset, where the SR offset srOffset is used to specify an offset of the SR resource location on a subband; or

The SR resource location information includes the SR frame offset srFrameOffset and the index C _index of the code used for sending the SR, and the SR frame offset srFrameOffset is used to specify the system frame offset of the SR within a time interval with a length of sr-residentF*1s , the index C _index of the code used for sending the SR is used to indicate to the user equipment the code used for sending the SR in an index manner, where sr-residentF is the SR user resident factor.

In an optional embodiment, the first manner, that is, the network side sends the subband switching information to the user equipment through RRC signaling, further includes:

The network side carries the subband switching configuration information element Subband_HO_Config through the RRCConnectionReconfiguration message and sends it to the user equipment, thereby switching the working subband and reconfiguring the SR resource location information for the user equipment.

Specifically, the information element Subband_HO_Config includes a subband information indication, a C-RNTI value, and an SR indication, where the SR indication includes an SR offset srOffset, or the SR indication includes an SR frame offset srFrameOffset and a code used for sending SR. Index C _index .

Further, the network side sends an RRCConnectionReconfiguration message carrying the subband switching configuration information element through the PDSCH.

Specifically, the network side sends a DCI format encapsulated DCI containing downlink scheduling information through the PDCCH on the monitoring subband where the user equipment is located, and the DCI is the subband number corresponding to the resident subband where the user equipment is located and the The original C-RNTI of the user equipment is jointly scrambled.

The user equipment UE detects the PDCCH, demodulates the physical downlink shared channel PDSCH corresponding to the PDCCH, and finally obtains the subband switching information.

In one embodiment, the second manner, that is, the network side sends the subband switching information to the user equipment through the DCI information, further includes:

On the physical downlink control channel PDCCH, the network side encapsulates DCI through the preset subband switching dedicated downlink control information DCI format, and sends the subband number corresponding to the resident subband where the user equipment resides and the original C- The RNTI jointly scrambles the encapsulated DCI, thereby instructing the user equipment to switch the working subband and reconfigure the SR resource location information.

The user equipment UE detects the PDCCH, and successfully parses the DCI to obtain subband switching information.

In the embodiment of the present invention, when the network side decides that the user equipment performs intra-cell subband handover, the SR resources of the UE may be reconfigured through RRC signaling messages, or the SR resources of the UE may be reconfigured through DCI information. No matter which method is adopted, the specific indication parameters carried by them are the same, including subband information indication, C-RNTI value and SR indication.

The C-RNTI, full name of CellRadio Network Temporary Identifier, is a cell radio network temporary identifier, which is a dynamic identifier assigned to the UE by the base station, and uniquely identifies the UE under the air interface of a cell. C-RNTI is only valid.

When the SR resource of the UE is reconfigured through the DCI information, the subband information indication is also called the subband information indication field, the C-RNTI value is also called the C-RNTI value field, and the SR indication is also called the C-RNTI value field. Indicates the domain for the SR.

Wherein, the SR indication has different meanings under different signaling implementation manners. Corresponding to the manner in which the network side implements the configuration information of the SR resource, there are SR indication method 1 and SR indication method 2.

SR instruction method one:

When the SR resource location information includes the SR offset srOffset, the SR indication is the SR offset srOffset of the SR resource on one subband; in other words, the first location information method or the third When the location information of the SR resource is configured in the location information method, the SR indication is the SR offset srOffset of the SR resource on one subband.

This condition is called SR indication method 1. In the SR indication method, because it is an intra-cell subband handover, the SR user resident factor sr-residentF parameter does not need to be re-indicated in the DCI information, and the previously configured sr-residentF parameter is directly used. value can be.

SR instruction method 2:

When the SR resource location information includes the SR frame offset srFrameOffset and the index C _index of the code used for sending the SR, the SR indication is the SR frame offset of the SR resource on one subband and the index of the code used for sending the SR. In other words, when the SR resource location information is configured through the second location information method or the fourth location information method described in this embodiment of the present invention, the SR indication is the SR frame offset of the SR resource on one subband and the code used for sending the SR index of.

This condition is called SR indication method 2. In SR indication method 2, because it is an intra-cell subband handover, the SR user resident factor sr-residentF parameter does not need to be re-indicated in the SR reconfiguration information, and the previously configured sr is directly used. The value of the -residentF parameter is sufficient.

In the case of the first SR indication method in this embodiment of the present invention, when the SR resource location information includes the SR offset srOffset, the network side configures the subband information indication, the C-RNTI value, and the SR indication as the first DCI format or second DCI format;

The first DCI format includes 24 bits, specifically:

The subband 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, specifically:

The Flag flag occupies 2 bits, the subband 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 the SR offset srOffset of the SR resource on a subband;

The value of the Flag flag includes 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 first value represents a DL grant. A value of three indicates subband switching.

Optionally, the first value may be 0, the second value may be 1, and the third value may be 2.

Both the first DCI format and the second DCI format according to the embodiment of the present invention use the original reserved subband number of the UE and the original C-RNTI value for joint scrambling.

When the UE detects the RRC signaling or DCI information of subband switching, the UE jumps to the frequency point corresponding to the subband number according to the subband number indicated by the subband information indication parameter in the subband switching RRC signaling or DCI information. subband, and update the value of the srOffset parameter according to the value of the SR offset indication field in the handover RRC signaling or DCI information, and obtain the updated UE-specific SR resource location according to the original sr-residentF and the updated srOffset. It should be noted that the subband switching RRC signaling or DCI information only updates the UE-specific SR resource location, while the number of SR repetitions and the maximum number of transmissions remain unchanged. That is, the modification of the number of SR repetitions and the maximum number of transmissions is configured through RRC messages.

In the case of the SR indication method 2 in this embodiment of the present invention, when the SR resource location information includes the SR frame offset srFrameOffset and the index C _index of the code used for sending the SR, the network side indicates the subband information, C index - The RNTI value and the SR indication are configured as the third DCI format or the fourth DCI format;

The third DCI format includes 24 bits, specifically:

The subband 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, specifically:

The Flag flag occupies 2 bits, the subband 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 the SR resource SR frame offset on one subband and the index C _index of the code used for sending SR, and the value of the SR indication is SR frame offset srFrameOffset*8 + index C of the code used for sending SR _index ;

The value of the Flag flag includes 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 first value represents a DL grant. A value of three indicates subband 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 the subband switching RRC signaling or DCI information, the UE jumps to the subband of the frequency corresponding to the subband number according to the subband number indicated by the subband information indication field in the subband switching RRC signaling or DCI information. The value of the updated srFrameOffset parameter and the value of the C _index parameter are calculated according to the value of the SR indication field in the switching RRC signaling or DCI information, and the updated srFrameOffset and C index are obtained according to the original sr-residentF and the updated srFrameOffset and C _index . UE-specific SR resource location. It should be noted that the subband switching RRC signaling or DCI information only updates the UE-specific SR resource location, while the number of SR repetitions and the maximum number of transmissions remain unchanged. That is, the modification of the number of SR repetitions and the maximum number of transmissions is configured through RRC messages.

In addition, the SR frame offset srFrameOffset and the index C _index of the code used for sending SR can also be designed in RRC signaling or DCI information to design SR indications, such as SR frame offset indication and indication of the index of the code used for sending SR. This embodiment of the present invention will not be described repeatedly.

An embodiment of the present invention also provides an indication method for subband switching in an OFDM system, including:

If the user equipment receives the subband switching information sent by the network side, the user equipment performs intra-cell subband switching, and reconfigures the current SR resource location information according to the subband switching information after completing the subband switching; The SR resource location information includes subband information indication, C-RNTI value and SR indication.

The subband information indication is used to indicate the subband number that the UE is to switch to a new subband; the C-RNTI value is a new C-RNTI value reconfigured by the network side for the UE; the SR The indication is the SR resource location information reconfigured by the network side for the UE.

The embodiment of the present invention is a processing method on the user side corresponding to the processing on the network side, and the execution subject is a user equipment. After the network side sends the subband switching information to the user side, the user side reconfigures the current SR resources according to the subband switching information to adapt to the intra-cell subband switching scenario.

Corresponding to the method on the network side, when the network side sends the subband switching information through RRC signaling, the user equipment obtains the subband switching information through RRC signaling; when the network side sends the subband switching information through DCI information, the user equipment The device obtains the subband switching information through the DCI information.

Since the subband switching information on the network side is the reconfiguration performed on the UE that has already configured the SR resource, the basic data of its configuration is still the original configuration information of the SR resource. For the configuration information of the SR resource, the location of the SR resource, and the specific description of each parameter in the SR resource reconfiguration information, please refer to the relevant description on the network side, which will not be repeated here.

In an embodiment, the reconfiguring the current SR resource according to the SR resource reconfiguration information includes performing the first processing or the second processing according to the SR resource reconfiguration information;

The first process includes:

The user equipment jumps to the subband of the corresponding frequency point according to the subband number indicated by the subband information, updates the SR offset srOffset according to the value indicated by the SR, and according to the original sr-residentF and the updated srOffset obtain the updated UE-specific SR resource location;

The second process includes:

The user equipment jumps to the subband of the corresponding frequency point according to the subband number indicated by the subband information, updates the srFrameOffset parameter and the C index parameter according to the value indicated by the SR, and updates the srFrameOffset parameter and the C _index parameter according to the value indicated by the SR. The srFrameOffset parameter and the C _index parameter obtain the updated UE-specific SR resource location.

In one embodiment, the first process satisfies the following two formulas:

SFN mod(sr-residentF*40)=a;

C _index =srOffset mod 8;

对于b，当PHYCellID mod n＝0时，b＝n；当PHYCellID mod n≠0时，b＝PHYCellID mod n，PHYCellID为所述用户设备所在小区的物理小区ID，n为复用因子，sr-residentF为SR用户驻留因子sr-residentF，srOffset为SR偏移srOffset。Among them, SFN is the radio frame number where the SR resource is located,

For b, when PHYCellID mod n=0, b=n; when PHYCellID mod n≠0, b=PHYCellID mod n, PHYCellID is the physical cell ID of the cell where the user equipment is located, n is the reuse factor, sr- residentF is the SR user resident factor sr-residentF, and srOffset is the SR offset srOffset.

In the embodiment of the present invention, the SR resource on one radio frame on one subband can support 8 UEs to report SR. According to the SR user resident factor sr-residentF, the total number of SR resources N _SR-subband on each subband can be calculated according to the formula (1), that is, the maximum number of UEs supporting the configuration of SR resources on each subband in a certain cell, the formula (1) is:

N _SR-subband =sr-residentF*40/(n+1)*8 (1)

Among them, n is a reuse factor, which is a reuse factor given by considering the influence of inter-cell co-channel interference. The SR offset srOffset is used to indicate the offset of the SR resource location on a subband, and the value range of SR is [0, N _SR-subband -1].

The UE determines the location of the SR resource to send according to the physical cell ID, sr-residentF and srOffset of the cell where the UE is located, that is, the SR resource corresponding to the UE has an SR resource location indicated by srOffset within the time interval with the length of sr-residentF*1s .

Specifically, the radio frame number SFN where the SR resource configured by the UE is located, and the index of the code used for sending the SR is C _index . The specific calculation formula is as follows:

SFN mod(sr-residentF*40)=a (2)

C _index = srOffset mod 8 (3)

对于b，当PHYCellID mod n＝0时，b＝n；当PHYCellID mod n≠0时，b＝PHYCellID mod n，PHYCellID为UE所在小区的物理小区ID，n为复用因子，是考虑小区间同频干扰的影响给出的复用因子。sr-residentF为SR用户驻留因子sr-residentF，srOffset为SR偏移srOffset。换言之，满足上面公式条件的无线帧才能够用于发送SR。in,

For b, when PHYCellID mod n=0, b=n; when PHYCellID mod n≠0, b=PHYCellID mod n, PHYCellID is the physical cell ID of the cell where the UE is located, and n is the reuse factor, which is to consider the same inter-cell The reuse factor given by the effect of frequency interference. sr-residentF is the SR user resident factor sr-residentF, and srOffset is the SR offset srOffset. In other words, only radio frames that satisfy the conditions of the above formula can be used to transmit SR.

Thus, the UE can obtain the SR resource location information according to the subband switching information indicated by the network side.

In one embodiment, the second process satisfies the following formula:

SFN mod(sr-residentF*40)=srFrameOffset;

Wherein, SFN is the radio frame number where the SR resource is located, sr-residentF is the SR user resident factor sr-residentF, srFrameOffset is the SR frame offset srFrameOffset, and C _index is the index C _index of the code used for sending the SR.

In the embodiment of the present invention, the SR resource on one radio frame on one subband can support 8 UEs to report SR, and the UE is indicated and distinguished by the index of the code used for sending the SR.

The UE further determines that the UE itself can be used to send the SR resource position according to srFrameOffset and C _index . Specifically, the radio frame number SFN where the SR resource configured by the UE is located. Calculated as follows:

SFN mod(sr-residentF*40)=srFrameOffset(4)

Among them, sr-residentF and srFrameOffset are network side configuration parameters. In other words, only radio frames that satisfy the conditions of the above formula can be used to transmit SR.

The index C _index of the code used for sending the SR is a parameter configured on the network side. Thus, the UE can obtain the location of the SR resource configured for it by the network side.

The above-mentioned embodiments of the SR resource reconfiguration method on the user side correspond to the method on the network side, and the SR resource reconfiguration is realized through the mutual cooperation between the user side and the network side.

The embodiment of the present invention also provides a network device, including an SR resource reconfiguration module;

The SR resource reconfiguration module is configured to send subband switching information to the user equipment through RRC signaling or DCI information when the network side decides that the user equipment performs intra-cell subband switching, so as to switch the working subband for the user equipment. Bring and reconfigure SR resource location information;

Wherein, the subband switching information includes subband information indication, C-RNTI value and SR indication; the subband information indication is used to indicate the subband number that the UE is to switch to a new subband; the C-RNTI The value is the new C-RNTI value reconfigured by the network side for the UE; the SR indication is the SR resource location information reconfigured by the network side for the UE.

The network device according to the embodiment of the present invention is used to implement the method for indicating subband switching on the network side according to the embodiment of the present invention. This embodiment and the following embodiments correspond to the method for indicating subband switching on the network side one-to-one. , for the specific description of each embodiment, please refer to the subband switching indication method on the network side, which will not be repeated here.

In one embodiment, the configuration information of the SR resource includes some or all of the following parameters: SR user residence factor sr-residentF, SR repetition factor sr-NumRepetitionFactor, SR maximum transmission number dsr-TransMax, UE-specific SR Configuration information and quick adjustment SR configuration information;

The SR user resident factor sr-residentF is used to indicate the time interval of SR resources on each subband in a cell;

The SR repetition times factor sr-NumRepetitionFactor is used to indicate the repetition times of sending the SR;

The maximum number of SR transmissions, dsr-TransMax, is used to indicate the maximum number of SR transmissions;

The UE-specific SR configuration information is a configuration parameter of a specific sending scheduling request resource allocated by the network side for the user equipment, including establishing a UE-specific SR configuration and/or releasing a UE-specific SR configuration, wherein the establishing a UE-specific SR configuration The SR configuration contains SR resource location information;

The fast-adjustment SR configuration information is a configuration parameter pre-allocated by the network side for the user equipment that transmits services in the fast-dispatch mode to send scheduling request resources, including establishing a fast-adjustment SR configuration and/or releasing a fast-adjustment SR configuration, wherein, The SR resource location information is included in the establishment and quick adjustment SR configuration.

In one embodiment, the SR resource location information includes an SR offset srOffset, where the SR offset srOffset is used to specify an offset of the SR resource location on a subband; or

The SR resource location information includes the SR frame offset srFrameOffset and the index C _index of the code used for sending the SR, and the SR frame offset srFrameOffset is used to specify the system frame offset of the SR within a time interval with a length of sr-residentF*1s , the index C _index of the code used for sending the SR is used to indicate the code used for sending the SR to the user equipment in an index manner.

In one embodiment, the SR resource reconfiguration module includes an RRC reconfiguration unit or a DCI reconfiguration unit;

The RRC reconfiguration unit is used for the network side to carry the subband switching configuration information element Subband_HO_Config through the RRCConnectionReconfiguration message and send it to the user equipment, so as to switch the subband and reconfigure the SR resource location information for the user equipment;

The DCI reconfiguration unit is used for the network side to encapsulate the DCI on the physical downlink control channel PDCCH through the preset subband switching dedicated downlink control information DCI format, and send the subband number corresponding to the resident subband where the user equipment is located. The encapsulated DCI is jointly scrambled with the original C-RNTI of the user equipment, thereby switching the working subband and reconfiguring the SR resource location information for the user equipment.

In one embodiment, when the SR resource location information includes the SR offset srOffset, the network side configures the subband information indication, the C-RNTI value and the SR indication as a first DCI format or a second DCI format ;

The first DCI format includes 24 bits, specifically:

The subband 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, specifically:

The Flag flag occupies 2 bits, the subband 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 the SR offset srOffset of the SR resource on a subband;

The value of the Flag flag includes 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 first value represents a DL grant. A value of three indicates subband switching.

In one embodiment, when the SR resource location information includes the SR frame offset srFrameOffset and the index C _index of the code used for sending the SR, the network side configures the subband information indication, the C-RNTI value and the SR indication is the third DCI format or the fourth DCI format;

The third DCI format includes 24 bits, specifically:

The subband 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, specifically:

The Flag flag occupies 2 bits, the subband 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 the SR resource SR frame offset on one subband and the index C _index of the code used for sending SR, and the value of the SR indication is SR frame offset srFrameOffset*8 + index C of the code used for sending SR _index ;

The value of the Flag flag includes 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 first value represents a DL grant. A value of three indicates subband switching.

The present invention also provides a user equipment, comprising an SR resource reconfiguration processing module;

The SR resource reconfiguration processing module is configured to, if the user equipment receives the subband switching information sent by the network side, the user equipment performs subband switching within a cell, and after the subband switching is completed, according to the subband switching information Reconfigure the current SR resource location information; wherein, the SR resource reconfiguration information includes subband information indication, C-RNTI value and SR indication. .

The user equipment according to the embodiment of the present invention is used to implement the method for indicating subband switching on the user side according to the embodiment of the present invention. This embodiment and the following embodiments correspond to the method for indicating subband switching on the user side one-to-one. , for the specific description of each embodiment, please refer to the subband switching instruction method on the user side, which will not be repeated here.

In one embodiment, the SR resource reconfiguration processing module includes a first processing unit or a second processing unit;

The first processing unit is used for:

The user equipment jumps to the subband of the corresponding frequency point according to the subband number indicated by the subband information, updates the SR offset srOffset according to the value indicated by the SR, and according to the original sr-residentF and the updated srOffset obtain the updated UE-specific SR resource location;

The second processing unit is used for:

The user equipment jumps to the subband of the corresponding frequency point according to the subband number indicated by the subband information, updates the srFrameOffset parameter and the C index parameter according to the value indicated by the SR, and updates the srFrameOffset parameter and the C _index parameter according to the value indicated by the SR. The srFrameOffset parameter and the C _index parameter obtain the updated UE-specific SR resource location.

FIG. 4 shows a schematic structural diagram of a network device according to an embodiment of the present invention.

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 communicate with each other through the bus 803;

The processor 801 is configured to invoke the program instructions in the memory 802 to execute the methods provided by the above method embodiments, for example, including: when the network side decides that the user equipment performs intra-cell subband handover, the network side sends the RRC signal to the network side. order or DCI information to send subband switching information to the user equipment, thereby instructing the user equipment to switch the working subband and reconfigure the SR resource location information; wherein, the subband switching information includes subband information indication, C-RNTI value and SR indication; the subband information indication is used to indicate the subband number that the UE is to switch to a new subband; the C-RNTI value is the new C-RNTI value reconfigured by the network side for the UE; The SR indication is SR resource location information reconfigured by the network side for the UE.

Another embodiment of the present invention discloses a computer program product including a computer program stored on a non-transitory computer-readable storage medium, the computer program including program instructions, when the program instructions are executed by a computer When the computer is capable of executing the methods provided by the above method embodiments, for example, the method includes: when the network side decides that the user equipment performs intra-cell subband handover, the network side sends the subband handover information to the user equipment through RRC signaling or DCI information, thereby Instruct the user equipment to switch the working subband and reconfigure the SR resource location information; wherein, the subband switching information includes a subband information indication, a C-RNTI value and an SR indication; the subband information indication is used to indicate the UE The subband number to be switched to the new subband; the C-RNTI value is the new C-RNTI value reconfigured by the network side for the UE; the SR indication is the network side reconfigured for the UE SR resource location information.

Another embodiment of the present invention provides a non-transitory computer-readable storage medium, where the non-transitory computer-readable storage medium stores computer instructions, and the computer instructions cause the computer to execute the methods provided by the foregoing method embodiments , for example, including: when the network side decides 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, thereby instructing the user equipment to switch the working subband and reconfigure SR resources location information; wherein, the subband switching information includes a subband information indication, a C-RNTI value and an SR indication; the subband information indication is used to indicate the subband number that the UE is to switch to a new subband; the The C-RNTI value is a new C-RNTI value reconfigured by the network side for the UE; the SR indication is the SR resource location information reconfigured by the network side for the UE.

FIG. 5 shows a schematic structural diagram of a user equipment according to an embodiment of the present invention.

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 communicate with each other through the bus 903;

The processor 901 is configured to invoke the program instructions in the memory 902 to execute the methods provided by the foregoing method embodiments, for example, including: if the user equipment receives the subband switching information sent by the network side, Then the user equipment performs subband handover in the cell, and after completing the subband handover, reconfigures the current SR resource location information according to the subband handover information; wherein, the SR resource location information includes subband information indication, C-RNTI value and SR indication .

Another embodiment of the present invention discloses a computer program product including a computer program stored on a non-transitory computer-readable storage medium, the computer program including program instructions, when the program instructions are executed by a computer When the computer is capable of executing the methods provided by the above method embodiments, for example, the method includes: if the user equipment receives the subband switching information sent by the network side, the user equipment performs subband switching within the cell, and after completing the subband switching The current SR resource location information is reconfigured according to the subband switching information; wherein, the SR resource location information includes a subband information indication, a C-RNTI value and an SR indication.

Another embodiment of the present invention provides a non-transitory computer-readable storage medium, where the non-transitory computer-readable storage medium stores computer instructions, and the computer instructions cause the computer to execute the methods provided by the foregoing method embodiments , for example, including: if the user equipment receives the subband switching information sent by the network side, the user equipment performs subband switching within the cell, and after completing the subband switching, reconfigures the current SR resource location information according to the subband switching information ; wherein, the SR resource location information includes subband information indication, C-RNTI value and SR indication.

Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by program instructions related to hardware, the aforementioned program may be stored in a computer-readable storage medium, and when the program is executed, execute It includes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

The above-described embodiments such as a network device and a user equipment are only illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may be or It may not be a physical unit, that is, it may be located in one place, or it may be distributed over multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution in this embodiment. Those of ordinary skill in the art can understand and implement it without creative effort.

From the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and certainly can also be implemented by hardware. Based on this understanding, the above-mentioned technical solutions can be embodied in the form of software products in essence or the parts that make contributions to the prior art, and the computer software products can be stored in computer-readable storage media, such as ROM/RAM, magnetic A disc, an optical disc, etc., includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the methods described in various 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 protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (5)

1. a method for indicating subband switching in an OFDM system, comprising: When the network side decides that the user equipment performs intra-cell subband switching, the network side sends the subband switching information to the user equipment through RRC signaling or downlink control information DCI, thereby instructing the user equipment to switch the working subband and reconfigure the scheduling Request SR resource location information; Wherein, the subband switching information includes subband information indication, cell radio network temporary identifier C-RNTI value and SR indication; the subband information indication is used to indicate the subband number that the UE is to switch to a new subband; The C-RNTI value is a new C-RNTI value reconfigured by the network side for the UE; the SR indication is the SR resource location information reconfigured by the network side for the UE; The SR resource location information includes the SR offset srOffset, where the SR offset srOffset is used to specify the offset of the SR resource location on a subband; or The SR resource location information includes the SR frame offset srFrameOffset and the index C _index of the code used for sending the SR, and the SR frame offset srFrameOffset is used to specify the system frame offset of the SR within a time interval with a length of sr-residentF*1s , the index C _index of the code used for sending the SR is used to indicate the code used for sending the SR to the user equipment by means of an index, where sr-residentF is the SR user resident factor; The network side sends the subband switching information to the user equipment through the DCI, which further includes: On the physical downlink control channel PDCCH, the network side encapsulates DCI through the preset subband switching dedicated downlink control information DCI format, and sends the subband number corresponding to the resident subband where the user equipment resides and the original C- The RNTI jointly scrambles the encapsulated DCI, thereby instructing the user equipment to switch the working subband and reconfigure the SR resource location information; When the SR resource location information includes the SR offset srOffset, the network side configures the subband information indication, the C-RNTI value and the SR indication as the first DCI format or the second DCI format; The first DCI format includes 24 bits, specifically: The subband 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, specifically: The Flag flag occupies 2 bits, the subband 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 the SR offset srOffset of the SR resource on a subband; The value of the Flag flag includes 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 first value represents a DL grant. A value of three indicates subband switching. 2. The method of claim 1, wherein the network side sends subband switching information to the user equipment through RRC signaling, further comprising: The network side carries the subband switching configuration information element Subband_HO_Config through the RRC connection reconfiguration RRC ConnectionReconfiguration message and sends it to the user equipment, thereby switching the working subband and reconfiguring the SR resource location information for the user equipment. 3. The method of claim 2, wherein the information element Subband_HO_Config contains 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 It includes the SR frame offset srFrameOffset and the index C _index of the code used to transmit the SR. 4. The method according to claim 1, wherein when the SR resource location information includes an SR frame offset srFrameOffset and an index C _index of a code used for sending SR, the network side indicates the subband information to , the C-RNTI value and the SR indication are configured as the third DCI format or the fourth DCI format; The third DCI format includes 24 bits, specifically: The subband 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, specifically: The Flag flag occupies 2 bits, the subband 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 the SR resource SR frame offset on one subband and the index C _index of the code used for sending SR, and the value of the SR indication is SR frame offset srFrameOffset*8 + index C of the code used for sending SR _index ; The value of the Flag flag includes 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 first value represents a DL grant. A value of three indicates subband switching. 5. A method for indicating subband switching in an OFDM system, comprising: If the user equipment receives the subband switching information sent by the network side, the user equipment performs intra-cell subband switching, and after completing the subband switching, reconfigures the current scheduling request SR resource location information according to the subband switching information; Band handover information includes subband information indication, cell wireless network temporary identity C-RNTI value and SR indication; The reconfiguring the current SR resource location information according to the subband switching information includes performing the first processing or the second processing according to the SR resource location information; The first process includes: The user equipment jumps to the subband of the corresponding frequency point according to the subband number indicated by the subband information, updates the SR offset srOffset according to the value indicated by the SR, and according to the original sr-residentF and the updated srOffset Obtain the updated SR resource location information, where sr-residentF is the SR user residence factor; The second process includes: The user equipment jumps to the subband of the corresponding frequency point according to the subband number indicated by the subband information, updates the srFrameOffset parameter and the C index parameter according to the value indicated by the SR, and updates the srFrameOffset parameter and the C _index parameter according to the value indicated by the SR. The srFrameOffset parameter and the C _index parameter get the updated SR resource location information; The first process satisfies the following two formulas: SFN mod(sr-residentF*40)=a; C _index =srOffset mod 8; Among them, SFN is the radio frame number where the SR resource is located,

For b, when PHYCellIDmod n=0, b=n; when PHYCellID mod n≠0, b=PHYCellID mod n, PHYCellID is the physical cell ID of the cell where the user equipment is located, n is the reuse factor, sr-residentF is the SR user resident factor sr-residentF, and srOffset is the SR offset srOffset; The second process satisfies the following formula: SFN mod(sr-residentF*40)=srFrameOffset; Wherein, SFN is the radio frame number where the SR resource is located, sr-residentF is the SR user resident factor sr-residentF, srFrameOffset is the SR frame offset srFrameOffset, and C _index is the index C _index of the code used for sending the SR.

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