JP2014530527A - Resource block group distribution method and distribution apparatus in LTE system - Google Patents

Resource block group distribution method and distribution apparatus in LTE system Download PDF

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JP2014530527A
JP2014530527A JP2014530077A JP2014530077A JP2014530527A JP 2014530527 A JP2014530527 A JP 2014530527A JP 2014530077 A JP2014530077 A JP 2014530077A JP 2014530077 A JP2014530077 A JP 2014530077A JP 2014530527 A JP2014530527 A JP 2014530527A
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time slot
rbg
terminal
distribution
enodeb
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JP5764263B2 (en
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ジチアン フアン
ジチアン フアン
ジョンシ シエ
ジョンシ シエ
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ゼットティーイー コーポレイション
ゼットティーイー コーポレイション
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management, e.g. wireless traffic scheduling or selection or allocation of wireless resources
    • H04W72/04Wireless resource allocation
    • H04W72/08Wireless resource allocation where an allocation plan is defined based on quality criteria

Abstract

A method and apparatus for distributing RBGs in an LTE system that can increase fading resistance of the LTE system and further improve the performance of the entire system. The distribution method according to the present invention is based on the received channel quality indicator (CQI) information and the usage status of the RBG recorded in itself, and the time slot 1 and / or time slot is transmitted to the terminal that has transmitted the CQI information. 2 and distributing the RBG distribution result to the DCI in a new downlink control information (DCI) format. According to the present invention, the fading resistance of the LTE system is increased by distributing RBGs to the two time slots in the general subframe based on the signal conditions of the two time slots in the general subframe, respectively. Furthermore, the performance of the entire system can be improved. [Selection] Figure 1

Description

  The present invention relates to a resource distribution technique in a long term evolution (LTE) system in the field of wireless communication, and more particularly to a resource block group (RBG) distribution method and distribution apparatus in an LTE system.

  The LTE project in the 3rd Generation Partnership Project (3GPP) in the field of wireless communication is an evolution of 3G, improving and enhancing 3G air access technology, and Orthogonal Frequency Division Multiplexing (OFDM). A technology that employs Frequency Division Multiplexing (FDMA) / Frequency Division Multiplexing (FDMA) as a core is employed.

  In the LTE technology, a scheduling unit is one subframe, that is, 1 ms, and there are two types of structures of a general subframe and a special subframe. A typical subframe includes two time slots, each time slot being 0.5 ms. Two time slots in a general subframe are referred to as time slot 1 and time slot 2, respectively, in chronological order according to the order of each time slot. A special subframe includes three special time slots. When uplink / downlink service transmission is performed in each of general subframes, physical resources are distributed using RBG as a basic unit. The RBG is composed of a plurality of physical resource blocks (PRBs), and one PRB has a bandwidth of 180 kHz in the frequency domain.

  An evolved base station (eNodeB) in the LTE system distributes RBGs to any one terminal managed by the eNB by the following method. The eNodeB performs a pair of RBG distribution of the time slot 1 and the time slot 2 to the terminal based on the resource distribution algorithm defined in the protocol with respect to the terminal that has transmitted channel quality indicator (CQI) information. Also, the eNodeB notifies the terminal of the distribution result of the RBG via downlink control information (DCI: Downlink Control Information). The terminal transmits and receives uplink and downlink service data at an RBG location designated according to DCI. When the eNodeB notifies the terminal of the RBG distribution result via the DCI, the eNodeB selects a corresponding DCI format according to the transmission mode of the terminal, and the resource block distribution (RBA) in the DCI is selected based on the RBG distribution result of the terminal. : Write in the Resource Block Assignment field and send the DCI to the terminal via the Physical Downlink Control Channel (PDCCH). When selecting the corresponding DCI format according to the transmission mode of the terminal, the eNodeB selects the DCI format corresponding to the transmission mode associated according to the protocol. For example, the eNodeB selects DCI 1a as the DCI format corresponding to the transmission mode 2.

  However, in the RBG distribution method described above, since RBG distribution of time slot 1 and time slot 2 is performed in pairs, the eNodeB is based on signal quality conditions of two time slots in a general subframe in CQI information. RBGs cannot be distributed flexibly to two time slots. In such a distribution method, the signal quality is good when the designated RBG is used in one time slot, and the signal quality is bad when the designated RBG resource is used in another time slot. May appear. In such a case, once signal fading occurs, the quality of the signal received in the time slot with poor signal quality is affected, and further, the system performance is affected.

  As can be understood from the above description, in the existing distribution method in the LTE system in which the eNodeB distributes the RBG to any one terminal managed by the eNodeB, two time slots in a general subframe are distributed. RBG cannot be flexibly distributed to two time slots based on different signal quality situations. Therefore, the resistance to fading is low in the LTE system, and fading affects the performance of the entire system.

  In view of this, the object of the present invention is to distribute the RBG to the two time slots in the general subframe based on the signal quality of the two time slots in the general subframe, respectively. An object of the present invention is to provide an RBG distribution method and distribution apparatus in an LTE system that can increase fading resistance and further improve the performance of the entire system.

  In order to achieve the above object, the technical scheme of the present invention is realized as follows.

The RBG distribution method in the LTE system according to the present invention is as follows:
Based on the received CQI information and the usage status of the RBG recorded in itself, the RBG in time slot 1 and / or time slot 2 is distributed to the terminal that transmitted the CQI information, and the distribution result of the RBG in a new DCI format Including writing to DCI.

In the above distribution method, before distributing the RBG in the time slot 1 and / or the time slot 2 to the terminal that transmitted the CQI information based on the received CQI information and the usage status of the RBG recorded on the CQI information, ,further,
The step of setting a new DCI format by adding a time slot indicator (TSI) field before the RBA field in the DCI format and setting other fields in the DCI format in accordance with the specifications of the existing protocol. Including
The TSI field is used to indicate a time slot corresponding to a distributed RBG.

In the above distribution method, based on the received CQI information and the usage status of the RBG recorded in itself, the step of distributing the RBG in the time slot 1 and / or the time slot 2 to the terminal that transmitted the CQI information includes:
Based on the frequency band with good signal quality of the terminal that transmitted the CQI information recorded in the CQI information, it is confirmed whether or not the corresponding RBG in the time slot 1 is idle. Determining whether the number of idle RBGs with good signal quality satisfies the request of the terminal that sent the CQI information, and if so, distributing the RBGs of time slot 1 to this terminal;
When the RBG corresponding to the frequency band with good signal quality of the terminal in time slot 1 is not idle, or when the number of RBGs corresponding to the frequency band with good signal quality in time slot 1 does not satisfy the request of the terminal, Based on the frequency band with good signal quality of the terminal that transmitted the CQI information recorded in the CQI information, it is confirmed whether the corresponding RBG in the time slot 2 is idle. Determining whether the number of idle RBGs with good signal quality satisfies the request of the terminal that transmitted the CQI information, and if so, distributing the RBGs of time slot 2 to the terminal;
When the RBG corresponding to the frequency band with good signal quality of the terminal in time slot 2 is not idle, or when the number of RBGs corresponding to the frequency band with good signal quality in time slot 2 does not satisfy the request of the terminal, Distributing RBGs in time slot 1 and time slot 2 in pairs.

  In the above distribution method, the step of writing the RBG distribution result in the DCI format in the DCI format includes writing the RBG distribution result in the RBA field of the new DCI format and entering the RBG distribution time slot in the TSI field.

In the above distribution method, the step of writing the RBG distribution result in the RBA field of the new DCI format and writing the RBG distribution time slot in the TSI field includes
If the distributed time slot is time slot 1, the TSI field is set to 0x01, the RBG distribution result is written to the RBA field, and if the distributed time slot is time slot 2, the TSI field is set to 0x02. When the distribution result of RBG is written in the RBA field, and time slot 1 and time slot 2 are distributed in pairs, the TSI field is set to 0x00, and the RBG of the pair of time slot 1 and time slot 2 is set in the RBA field. Including writing the distribution result.

In the above distribution method, after the RBG distribution result is written to the DCI in the new DCI format, the method further includes:
The eNodeB transmits DCI using a physical downlink control channel (PDCCH) to the terminal that transmitted the CQI information, and the terminal demodulates the DCI using a preset program for demodulating a new DCI format. .

An RBG distribution apparatus in an LTE system according to the present invention includes an eNodeB transmission / reception module and an eNodeB resource distribution module.
The eNodeB transceiver module is used to transmit the received CQI information to the eNodeB resource distribution module.
The eNodeB resource distribution module distributes the RBG in time slot 1 and / or time slot 2 to the terminal that transmitted the CQI information based on the CQI information from the eNodeB transmission / reception module and the RBG usage status recorded in itself. It is used to write the distribution result of RBG to DCI in DCI format.

In the distribution device, the eNodeB resource distribution module stores a new DCI format in which a TSI field is added before an RBA field in the DCI format and other fields in the DCI format are set in accordance with the prescription of the existing protocol. Used for that.
The TSI field is used to indicate a time slot corresponding to a distributed RBG.

In the distribution device, the eNodeB resource distribution module includes:
Based on the frequency band with good signal quality of the terminal that transmitted the CQI information recorded in the CQI information, it is confirmed whether or not the corresponding RBG in the time slot 1 is idle. Determine whether the number of idle RBGs with good signal quality meets the requirements of the terminal that sent this CQI information, and if so, distribute the RBGs of time slot 1 to this terminal,
When the RBG corresponding to the frequency band with good signal quality of the terminal in time slot 1 is not idle, or when the number of RBGs corresponding to the frequency band with good signal quality in time slot 1 does not satisfy the request of the terminal, Based on the frequency band with good signal quality of the terminal that transmitted the CQI information recorded in the CQI information, it is confirmed whether or not the corresponding RBG in the time slot 2 is idle. Determine whether the number of idle RBGs with good signal quality satisfies the request of the terminal that sent the CQI information, and if so, distribute the RBG of time slot 2 to this terminal,
When the RBG corresponding to the frequency band with good signal quality of the terminal in time slot 2 is not idle, or when the number of RBGs corresponding to the frequency band with good signal quality in time slot 2 does not satisfy the request of the terminal, It is used to distribute RBGs of time slot 1 and time slot 2 in pairs.

  In the distribution apparatus, the eNodeB resource distribution module is used to write the RBG distribution result in the RBA field of the new DCI format and to enter the RBG distribution time slot in the TSI field.

  In the distribution apparatus, when the distributed time slot is time slot 1, the eNodeB resource distribution module sets the TSI field to 0x01, writes the RBG distribution result in the RBA field, and the distributed time slot is the time slot. In the case of slot 2, the TSI field is set to 0x02, the RBG distribution result is written to the RBA field, and when time slot 1 and time slot 2 are distributed in pairs, the TSI field is set to 0x00 and the RBA field is set. It is used to write the distribution result of RBGs of time slot 1 and time slot 2 pairs.

The distribution apparatus further includes a terminal DCI demodulation module used to receive DCI from the eNodeB transmission / reception module and demodulate the DCI using a preset program for demodulating a new DCI format.
Correspondingly, the eNodeB transceiver module is further used to receive DCI from the eNodeB resource distribution module and transmit DCI to the terminal DCI demodulation module using PDCCH.
The eNodeB resource distribution module is further used to transmit DCI including the RBG distribution result to the eNodeB transceiver module.

  In the distribution apparatus, the eNodeB transmission / reception module and the eNodeB resource distribution module are arranged in the eNodeB, and the terminal DCI demodulation module is arranged in the terminal.

  The RBG distribution method and distribution apparatus in the LTE system according to the present invention provides two times in a general subframe of a terminal that has transmitted CQI information based on the received CQI information and the usage status of the RBG recorded in itself. The signal status of the slot is confirmed, and RBGs in time slot 1 or time slot 2 or RBGs in time slot 1 and time slot 2 are distributed in pairs to terminals that have transmitted CQI information. Further, in the present invention, the DCI format is improved to obtain a new DCI format, which enables the DCI to transmit the distribution result of RBGs in time slot 1 and / or time slot 2. Thus, according to the present invention, it is possible to increase the fading resistance of the LTE system by distributing RBGs in different time slots, and further improve the performance of the entire system.

3 is a flowchart of an RBG distribution method in the LTE system according to the present invention. It is a flowchart of Example 1 of the distribution method of RBG in the LTE system which concerns on this invention. It is a flowchart of Example 2 of the distribution method of RBG in the LTE system which concerns on this invention. It is a figure which shows the structure of the distribution apparatus of RBG in the LTE system which concerns on this invention.

  The basic idea of the present invention is to distribute RBGs in time slot 1 and / or time slot 2 to terminals that have transmitted CQI information based on the received CQI information and the usage status of the RBG recorded in itself. The RBG distribution result is written to DCI in a proper DCI format.

  Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings and specific examples.

  As shown in FIG. 1, the method for distributing RBGs in the LTE system includes the following steps.

  Step 101: Set a new DCI format.

  Here, in the new DCI format, a TSI field is added before the RBA field in the DCI format specified in the protocol, and other fields in the DCI format are set in accordance with the specification of the existing protocol. The TSI field is used to indicate a time slot for distributing the RBG to this terminal, and its length is 2 bytes. In the TSI field, 0x00 indicates that the time slot 1 and time slot 2 are distributed in pairs, 0x01 indicates that only time slot 1 is distributed, and 0x02 indicates that only time slot 2 is distributed. Has been.

  Step 102: RBGs in time slot 1 and / or time slot 2 are distributed to terminals that have transmitted CQI information based on the received CQI information and the usage status of the RBG recorded in itself.

  Here, the CQI information is information on the signal quality status of the downlink channel of the location base station monitored by the terminal. The generation method and transmission format of CQI information are all existing technologies, and detailed description thereof is omitted here. For the CQI information, the terminal may periodically transmit the CQI information to the eNodeB according to a preset period, or after the terminal receives the CQI information report command from the eNodeB, the CQI information is transmitted to the eNodeB. Also good.

  Step 103: Write the RBG distribution result to the DCI in a new DCI format.

  Here, the writing includes writing the RBG distribution result in the RBA field of the new DCI format, and entering the RBG distribution time slot in the TSI field. Specifically, if the distributed time slot is time slot 1, the TSI field is set to 0x01, the distribution result of RBG is written in the RBA field, and if the distributed time slot is time slot 2, TSI When the field is set to 0x02, the RBG distribution result is written to the RBA field, and time slot 1 and time slot 2 are distributed in pairs, the TSI field is set to 0x00 and the time slot 1 and time slot 2 are set to the RBA field. The RBG distribution result of the pair of is written. The method of writing the distribution result of the RBG in the RBA field is the same as the writing method by the existing technology, and this writing method attaches an occupation mark to the RBG distributed this time in the resource bitmap defined in the existing technology. And marking the identifier of the distributed terminal.

  Based on the received CQI information and the usage status of the RBG recorded in itself, the step 102 of distributing the RBG in the time slot 1 and / or the time slot 2 to the terminal that has transmitted the CQI information includes the following steps.

  Step a: Check whether the corresponding RBG in the time slot 1 is idle based on the frequency band with good signal quality of the terminal that has transmitted the CQI information recorded in the CQI information. And if not idle, execute step c.

  Here, whether or not the terminal signal quality is good is determined by a preset signal quality threshold. If the signal strength of any one frequency band uploaded to the CQI information is higher than the signal quality threshold, it is determined that the frequency band has good signal quality. The signal quality threshold is set in advance according to the actual situation.

  Whether or not the RBG resource is idle is determined based on whether or not an occupation mark is added to the RBG resource recorded in the eNodeB.

  Step b: Determine whether the number of idle RBGs with good signal quality in time slot 1 satisfies the request of the terminal that transmitted the CQI information, and if so, distribute the RBG of time slot 1 to this terminal, If step 103 is not satisfied, step c is executed.

  Here, in the step of determining whether or not the request of the terminal that transmitted the CQI information is satisfied, the eNodeB confirms the number of RBGs necessary for the terminal recorded in the eNodeB according to the terminal identifier in the CQI information, It is determined whether or not the number of RBGs corresponding to a frequency band with good signal quality in the time slot 1 managed by the current eNodeB satisfies the request of this terminal. The information on the number of RBGs necessary for the terminal recorded in the eNodeB itself is information on the terminal that the eNodeB needs to record and manage, which is defined in the existing technology, and detailed description thereof is omitted here.

  Step c: Check whether the corresponding RBG in the time slot 2 is idle based on the frequency band with good signal quality of the terminal that has transmitted the CQI information recorded in the CQI information. Step d is executed, and if not idle, step e is executed.

  Step d: Determine whether the number of idle RBGs with good signal quality in time slot 2 satisfies the request of the terminal that transmitted the CQI information, and if so, distribute the RBG in time slot 2 to this terminal, If step 103 is not satisfied, step e is executed.

  Step e: RBGs in time slot 1 and time slot 2 are distributed in pairs, and step 103 is executed.

  Here, in the step of distributing the RBGs in time slot 1 and time slot 2 in pairs, distribution is performed according to the existing protocol. Therefore, detailed description of this distribution is omitted.

  Furthermore, it is necessary to improve the terminal managed by the eNodeB before step 101 in order to allow the terminal to demodulate the new DCI format according to the present invention. The terminal improvement method may be to set a demodulation program for demodulating a new DCI format in advance in the terminal. The method of writing and presetting a program for demodulating a new DCI format is the same as that of the existing technology, and a detailed description thereof is omitted here.

  In addition, the eNodeB determines a method to be adopted for setting the new DCI format in response to the terminal managed by itself being improved so that the new DCI format according to the present invention can be demodulated. There is a need. If most of the terminals currently managed by the eNodeB can be improved to terminals capable of demodulating the new DCI format, the new DCI format can be set using the method 1 and the new DCI format can be demodulated If most of the terminals that can be improved to terminals are not terminals, use method 2 to set a new DCI format. When determining whether most terminals can be improved, the ratio of terminals that can be improved among terminals managed by the eNodeB is higher than a preset ratio (for example, 98%). It is determined that most terminals can be improved.

  When a new DCI format is set using the method 1, the existing DCI format specified in the protocol is all modified to the corresponding new DCI format, and the new DCI format is changed to the original DCI format. It is still associated with the corresponding transmission mode. The transmission mode corresponding to the new DCI format is set by an existing technology. For example, if the transmission mode corresponding to the DCI 1a format is the transmission mode 2 in the existing technology, the transmission mode corresponding to the new DCI 1a format is still set to the transmission mode 2 in this embodiment. Other transmission mode setting methods corresponding to the new DCI format can be inferred from this, and therefore, detailed description thereof will be omitted.

  When a new DCI format is set using the method 2, a new DCI format is used between the terminal capable of demodulating the new DCI format and the eNodeB by additionally defining the new DCI format. . Then, the transmission mode of the terminal is defined by the new transmission mode, and the eNodeB associates the new DCI format with the new transmission mode. To define the new DCI format is to modify the existing DCI1a format, add a TSI field before the RSA field of the DCI1a format, and define the modified DCI1a format as the DCI7 format. . The above-described method for defining a new transmission mode is an existing technology. For example, a new transmission mode can be defined as the transmission mode 12.

  Further, when a new DCI format is set using method 1 in step 101, before step 102, the eNodeB, according to the existing technology, manages a terminal that can demodulate a new DCI format managed by itself. It is necessary to acquire a transmission mode and determine a new DCI format corresponding to a terminal capable of demodulating the new DCI format. Then, when executing step 103, the eNodeB uses the confirmed new DCI format, writes the RGB distribution result in the DCI, and transmits it to the corresponding terminal.

  When setting a new DCI format using method 2 in step 101, before step 102, the eNodeB acquires the transmission modes of all terminals managed by itself according to the existing technology, and stores the CQI information. It is determined whether the transmitting terminal is a terminal capable of demodulating a new DCI format. The eNodeB executes step 102 when the terminal that has transmitted the CQI information is a terminal that can demodulate a new DCI format, and the eNodeB that does not exist when the terminal that has transmitted the CQI information is not a terminal that can demodulate a new DCI format. Perform subsequent RBG dispensing operations according to the technique. Detailed description of the subsequent RBG distribution operation is omitted.

  After step 103 is completed, the eNodeB transmits the DCI to the terminal using the PDCCH. The terminal demodulates the DCI using a preset program for demodulating a new DCI format, and the distribution result of the RBG in the DCI. Depending on the existing operation, the subsequent operation is performed.

Example 1
All the terminals managed by the eNodeB are improved to terminals capable of demodulating a new DCI format, and the terminal to which the eNodeB sets a new DCI format using the method 1 and transmits the CQI information is the terminal 1. Assume that the transfer mode of 1 is 2. In this case, the RBG distribution method in the LTE system according to the present invention includes the following steps as shown in FIG.

  Step 201: The eNodeB uses method 1 to set a new DCI format.

  Step 202: The eNodeB determines that the new DCI format corresponding to the terminal 1 is the new DCI 1a format based on the transmission mode 2 of the terminal 1 managed by itself.

  Here, the transmission mode of the terminal is a parameter of the terminal managed by itself stored by the eNodeB, and the method by which the eNodeB acquires the transmission mode of the terminal is an existing technology. The explanation is omitted.

  Step 203: The eNodeB receives CQI information from the terminal 1 managed by itself.

  Step 204: The eNodeB distributes the RBGs in the time slot 1 and / or the time slot 2 to the terminal 1 based on the received CQI information and the usage status of the RBG recorded in the eNodeB.

  Step 205: The eNodeB writes the RBG distribution result in the DCI in the new DCI1a format and transmits it to the terminal 1.

Example 2
Of the terminals currently managed by the eNodeB, most of the terminals that can improve the new DCI format into terminals that can be demodulated are not terminals, and the eNodeB uses method 2 to set the new DCI format to DCI7. Assume. Further, it is assumed that the transmission mode corresponding to DCI7 is 12, the terminal that transmitted the CQI information is terminal 2 capable of demodulating the DCI7 format, and the transmission mode of terminal 2 is 12. In this case, the RBG distribution method in the LTE system according to the present invention includes the following steps as shown in FIG.

  Step 301: The eNodeB uses method 2 to set the new DCI format to the DCI7 format and defines the corresponding transmission mode to transmission mode 12.

  Step 302: The eNodeB determines that the new DCI format corresponding to the terminal 2 is the DCI7 format based on the transmission mode 12 of the terminal 2 managed by itself.

  Step 303: The eNodeB determines whether or not the received CQI information is information from the terminal 2, and executes step 304 if it is information from the terminal 2. If it is not information from the terminal 2, the subsequent processing is performed according to the existing technology, and step 303 is repeatedly executed in parallel with this processing.

  Step 304: The eNodeB distributes the RBG in the time slot 1 and / or the time slot 2 to the terminal 2 based on the received CQI information and the usage status of the RBG recorded in itself.

  Step 305: The eNodeB writes the RBG distribution result in the DCI7 format in the DCI and transmits it to the terminal 2.

  As shown in FIG. 4, the RBG distribution apparatus in the LTE system according to the present invention includes an eNodeB resource distribution module 41 and an eNodeB transmission / reception module 42.

  The eNodeB transceiver module 42 is used to transmit the received CQI information to the eNodeB resource distribution module 41.

  The eNodeB resource distribution module 41 distributes the RBG in the time slot 1 and / or the time slot 2 to the terminal that transmitted the CQI information based on the CQI information from the eNodeB transmission / reception module 42 and the RBG usage status recorded in the eNodeB transmission / reception module 42, It is used to write RBG distribution results to DCI in a new DCI format.

  The eNodeB resource distribution module 41 is used to store a new DCI format.

  The eNodeB resource distribution module 41 is specifically used to write the RBG distribution result in the RBA field of the new DCI format and to enter the RBG distribution time slot in the TSI field. More specifically, if the distributed time slot is time slot 1, the TSI field is set to 0x01, the RBG distribution result is written in the RBA field, and the distributed time slot is time slot 2. When the TSI field is set to 0x02, the RBG distribution result is written to the RBA field, and time slot 1 and time slot 2 are distributed in pairs, the TSI field is set to 0x00 and the time slot 1 and time slot are set to the RBA field. Used to write the distribution result of two pairs of RBGs.

  Specifically, the eNodeB resource distribution module 41 determines whether the corresponding RBG in the time slot 1 is idle based on the frequency band recorded in the CQI information and having good signal quality of the terminal that transmitted the CQI information. If it is idle, it is determined whether the number of idle RBGs with good signal quality in time slot 1 satisfies the request of the terminal that transmitted the CQI information, and if so, the RBG in time slot 1 is assigned to this terminal. Used to distribute.

  Also, the eNodeB resource distribution module 41 determines that the number of RBGs corresponding to the frequency band with good signal quality in time slot 1 is not idle when the RBG corresponding to the frequency band with good signal quality of the terminal in time slot 1 is not idle. If the terminal request is not satisfied, check whether the corresponding RBG in the time slot 2 is idle based on the frequency band with good signal quality of the terminal that transmitted the CQI information recorded in the CQI information, If idle, determine whether the number of idle RBGs with good signal quality in time slot 2 satisfies the request of the terminal that transmitted the CQI information, and if so, distribute the RBG of time slot 2 to this terminal Used for.

  In addition, the eNodeB resource distribution module 41 determines that the number of RBGs corresponding to the frequency band with good signal quality in the time slot 2 is the case where the RBG corresponding to the frequency band with good signal quality of the terminal in the time slot 2 is not idle. When the request of the terminal is not satisfied, the RBGs in time slot 1 and time slot 2 are used for distributing in pairs.

  The eNodeB resource distribution module 41 is further employed to set a new DCI format in response to the terminal managed by itself being improved so that the new DCI format according to the present invention can be demodulated. It is used to determine the method. Specifically, the eNodeB resource distribution module 41 uses the method 1 to update a new DCI format when most of the terminals currently managed by the eNodeB can be improved to terminals that can demodulate. When most terminals are not capable of setting a DCI format and improving the new DCI format to a terminal that can demodulate, it is used to set a new DCI format using Method 2. When determining whether most terminals can be improved, the ratio of terminals that can be improved among terminals managed by the eNodeB is higher than a preset ratio (for example, 98%). It is determined that most terminals can be improved.

  When a new DCI format is set using the method 1, all existing DCI formats defined in the protocol are modified to the corresponding new DCI format, and the new DCI format corresponds to the original DCI format. Is still associated with the transmission mode to be used. The setting of the transmission mode corresponding to the new DCI format is performed according to the existing technology. For example, if the transmission mode corresponding to the DCI 1a format is the transmission mode 2 in the existing technology, the transmission mode corresponding to the new DCI 1a format is still set to the transmission mode 2 in this embodiment. Other transmission mode setting methods corresponding to the new DCI format can be inferred from this, and therefore, detailed description thereof will be omitted.

  When a new DCI format is set using the method 2, a new DCI format is used between the terminal capable of demodulating the new DCI format and the eNodeB by additionally defining the new DCI format. . Then, the terminal transmission mode is defined as a new transmission mode, and the eNodeB associates the new DCI format with the new transmission mode. To define the new DCI format is to modify the existing DCI1a format, add a TSI field before the RSA field of the DCI1a format, and define the modified DCI1a format as the DCI7 format. . The above-described method for defining a new transmission mode is an existing technology. For example, a new transmission mode may be defined as the transmission mode 12.

  When the eNodeB resource distribution module 41 further sets a new DCI format using the method 1, the eNodeB resource distribution module 41 acquires the transmission mode of the terminal that can manage the new DCI format and is managed by itself, and It is used to determine a new DCI format corresponding to a terminal capable of demodulating the DCI format.

  When the eNodeB resource distribution module 41 further sets a new DCI format using the method 2, the eNodeB resource distribution module 41 acquires the transmission modes of all terminals managed by itself according to the existing technology and transmits the CQI information. Is a terminal capable of demodulating a new DCI format. When the terminal that transmitted the CQI information is a terminal that can demodulate a new DCI format, the time slot 1 and / or the time slot 1 and / or the terminal that transmitted the CQI information based on the received CQI information and the usage status of the RBG recorded by itself. Alternatively, if the terminal that distributes the RBG in time slot 2 and transmits the CQI information is not a terminal that can demodulate a new DCI format, a subsequent RBG distribution operation is executed according to the existing technology. Detailed description of the subsequent RBG distribution operation is omitted.

  The distribution apparatus further includes a terminal DCI demodulation module 43 used for storing a preset demodulation program for demodulating a new DCI format. The writing and presetting method of a program for demodulating a new DCI format are all existing techniques, and detailed description thereof is omitted here.

  The eNodeB resource distribution module 41 is further used to transmit DCI to the eNodeB transmission / reception module 42. Correspondingly, the eNodeB transceiver module 42 is further used to receive DCI from the eNodeB resource distribution module 41 and transmit DCI to the terminal DCI demodulation module 43 using PDCCH. The terminal DCI demodulation module 43 further receives the DCI from the eNodeB transceiver module 42, demodulates the DCI by a program for demodulating a preset new DCI format, and the existing DCI according to the distribution result in the DCI. Follow-up action according to technology.

  The eNodeB transceiver module 42 and the eNodeB resource distribution module 41 are arranged in the eNodeB, and the terminal DCI demodulation module 43 is arranged in the terminal.

  The above are only preferred embodiments of the present invention, and do not limit the protection scope of the present invention.

Claims (13)

  1. A resource block group (RBGResource Block Group) distribution method in a long term evolution (LTE) system,
    Based on the received channel quality indicator (CQI) information and the usage status of the RBG recorded in itself, the RBG in time slot 1 and / or time slot 2 is distributed to the terminal that transmitted the CQI information, and a new A distribution method comprising: writing a distribution result of RBG into DCI in a downlink control information (DCI) format.
  2. Before distributing the RBG in time slot 1 and / or time slot 2 to the terminal that transmitted the CQI information based on the received CQI information and the usage status of the RBG recorded on itself, the method further includes:
    By adding a Time Slot Indicator (TSI) field before the Resource Block Assignment (RBA) field in the DCI format and setting other fields in the DCI format according to the prescription of the existing protocol, Including setting a new DCI format;
    The distribution method according to claim 1, wherein the TSI field is used to indicate a time slot corresponding to a distributed RBG.
  3. Based on the received CQI information and the usage status of the RBG recorded in itself, the step of distributing the RBG in time slot 1 and / or time slot 2 to the terminal that transmitted the CQI information is as follows:
    Based on the frequency band with good signal quality of the terminal that transmitted the CQI information recorded in the CQI information, it is confirmed whether or not the corresponding RBG in the time slot 1 is idle. Determining whether the number of idle RBGs with good signal quality satisfies the request of the terminal that sent the CQI information, and if so, distributing the RBGs in time slot 1 to this terminal;
    When the RBG corresponding to the frequency band with good signal quality of the terminal in time slot 1 is not idle, or when the number of RBGs corresponding to the frequency band with good signal quality in time slot 1 does not satisfy the request of the terminal, Based on the frequency band with good signal quality of the terminal that transmitted the CQI information recorded in the CQI information, it is confirmed whether the corresponding RBG in the time slot 2 is idle. Determining whether the number of idle RBGs with good signal quality meets the requirements of the terminal that sent the CQI information, and if so, distributing the RBGs in time slot 2 to this terminal;
    When the RBG corresponding to the frequency band with good signal quality of the terminal in time slot 2 is not idle, or when the number of RBGs corresponding to the frequency band with good signal quality in time slot 2 does not satisfy the request of the terminal, The distribution method according to claim 1, further comprising: distributing RBGs in time slot 1 and time slot 2 in pairs.
  4. The step of writing the distribution result of the RBG in the DCI format into the DCI includes the step of writing the distribution result of the RBG into the RBA field of the new DCI format and entering the distribution time slot of the RBG in the TSI field. 2. The distribution method according to 1.
  5. The step of writing the distribution result of the RBG into the RBA field of the new DCI format and writing the distribution time slot of the RBG into the TSI field is as follows:
    If the distributed time slot is time slot 1, the TSI field is set to 0x01, the RBG distribution result is written to the RBA field, and if the distributed time slot is time slot 2, the TSI field is set to 0x02. When the distribution result of RBG is written in the RBA field, and time slot 1 and time slot 2 are distributed in pairs, the TSI field is set to 0x00, and the RBG of the pair of time slot 1 and time slot 2 is set in the RBA field. The distribution method according to claim 4, further comprising writing a distribution result.
  6. After writing the RBG distribution result to the DCI in the new DCI format, the method further comprises:
    The eNodeB uses the physical downlink control channel (PDCCH: Physical Downlink Control Channel) to send DCI to the terminal that sent the CQI information,
    The distribution method according to claim 1, further comprising a step of demodulating DCI by a program for demodulating a new DCI format that is set in advance by the terminal.
  7. RBG (Resource Block Group) distribution device in LTE (Long Term Evolution) system, comprising an eNodeB transmission / reception module and an eNodeB resource distribution module,
    The eNodeB transceiver module is used to transmit the received CQI (Channel Quality Indicator) information to the eNodeB resource distribution module,
    The eNodeB resource distribution module distributes the RBG in time slot 1 and / or time slot 2 to the terminal that transmitted the CQI information based on the CQI information from the eNodeB transmission / reception module and the RBG usage status recorded in itself. A distribution apparatus characterized by being used to write a distribution result of RBG to DCI in a DCI (Downlink Control Information) format.
  8. In the eNodeB resource distribution module, a new time slot indicator (TSI) field is added before an RBA (Resource Block Assignment) field in the DCI format, and other fields in the DCI format are set according to the specifications of the existing protocol. Used to store DCI format,
    The distribution device according to claim 7, wherein the TSI field is used to indicate a time slot corresponding to a distributed RBG.
  9. The eNodeB resource distribution module is:
    Based on the frequency band with good signal quality of the terminal that transmitted the CQI information recorded in the CQI information, it is confirmed whether or not the corresponding RBG in the time slot 1 is idle. Determine whether the number of idle RBGs with good signal quality meets the requirements of the terminal that sent the CQI information, and if so, distribute the RBGs in time slot 1 to this terminal;
    When the RBG corresponding to the frequency band with good signal quality of the terminal in time slot 1 is not idle, or when the number of RBGs corresponding to the frequency band with good signal quality in time slot 1 does not satisfy the request of the terminal, Based on the frequency band with good signal quality of the terminal that transmitted the CQI information recorded in the CQI information, it is confirmed whether the corresponding RBG in the time slot 2 is idle. Determine whether the number of idle RBGs with good signal quality meets the requirements of the terminal that sent the CQI information, and if so, distribute the RBGs in time slot 2 to this terminal;
    When the RBG corresponding to the frequency band with good signal quality of the terminal in time slot 2 is not idle, or when the number of RBGs corresponding to the frequency band with good signal quality in time slot 2 does not satisfy the request of the terminal, 8. The distribution device according to claim 7, wherein the distribution device is used to distribute RBGs of time slot 1 and time slot 2 in pairs.
  10. 8. The distribution device according to claim 7, wherein the eNodeB resource distribution module is used to write an RBG distribution result in an RBA field of a new DCI format, and to enter an RBG distribution time slot in a TSI field. .
  11. When the distributed time slot is time slot 1, the eNodeB resource distribution module sets the TSI field to 0x01, writes the RBG distribution result in the RBA field, and the distributed time slot is time slot 2. When the TSI field is set to 0x02, the RBG distribution result is written in the RBA field, and time slot 1 and time slot 2 are distributed in pairs, the TSI field is set to 0x00 and the time slot 1 and time are set in the RBA field. The distribution device according to claim 10, wherein the distribution device is used to write a distribution result of RBGs of a pair of slots 2.
  12. The distribution apparatus further includes a terminal DCI demodulation module used for receiving DCI from the eNodeB transmission / reception module and demodulating the DCI using a program for demodulating a preset new DCI format,
    Correspondingly, the eNodeB transceiver module is further used to receive DCI from the eNodeB resource distribution module and transmit DCI to the terminal DCI demodulation module using PDCCH (Physical Downlink Control Channel),
    The distribution device according to claim 11, wherein the eNodeB resource distribution module is further used to transmit DCI including a distribution result of RBG to the eNodeB transmission / reception module.
  13. The distribution apparatus according to claim 12, wherein the eNodeB transceiver module and the eNodeB resource distribution module are arranged in an eNodeB, and the terminal DCI demodulation module is arranged in a terminal.
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