WO2013170687A1 - 无线通信系统中的通信方法和设备 - Google Patents
无线通信系统中的通信方法和设备 Download PDFInfo
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- WO2013170687A1 WO2013170687A1 PCT/CN2013/074564 CN2013074564W WO2013170687A1 WO 2013170687 A1 WO2013170687 A1 WO 2013170687A1 CN 2013074564 W CN2013074564 W CN 2013074564W WO 2013170687 A1 WO2013170687 A1 WO 2013170687A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0037—Inter-user or inter-terminal allocation
- H04L5/0039—Frequency-contiguous, i.e. with no allocation of frequencies for one user or terminal between the frequencies allocated to another
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0037—Inter-user or inter-terminal allocation
- H04L5/0041—Frequency-non-contiguous
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
- H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
- H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
Definitions
- the present disclosure relates to the field of wireless communications, and in particular, to a communication method, a communication device, and a wireless communication including the communication device, in a subsequent evolution (LTE-A) of, for example, Universal Mobile Telecommunications System (UMTS) Long Term Evolution (LTE-A) system.
- LTE-A subsequent evolution
- UMTS Universal Mobile Telecommunications System
- LTE-A Long Term Evolution
- LTE-A LTE-A
- 3GPP completed the technical requirements report of LTE-A, and proposed the minimum requirement of LTE-A, namely, the downlink peak rate of 1 Gbps, the uplink peak rate of 500 Mbps, and the uplink and downlink.
- the peak spectrum utilization rates are 15 Mbps/Hz and 30 Mbps/Hz, respectively.
- 3GPP proposes several key technologies for LTE-A, including carrier aggregation, coordinated multi-point transmission and reception, relay transmission and multi-antenna enhancement.
- the Physical Downlink Control Channel (PDCCH) carries Downlink Control Information (DCI), and includes resource allocation information and other control information on one or more User Equipments (UEs).
- DCI Downlink Control Information
- UEs User Equipments
- uplink and downlink resource scheduling information is carried by the PDCCH.
- the user needs to demodulate the DCI in the PDCCH before demodulating the physical downlink shared channel (PDSCH: including broadcast message, paging, UE data, etc.) belonging to the user at the corresponding resource location.
- PDSCH including broadcast message, paging, UE data, etc.
- an enhanced physical downlink control channel (Enhanced PDCCH, ePDCCH) is proposed in 3GPP standardization. ), used to increase the capacity of control information, and can support technologies such as beamforming, diversity, and inter-cell interference cancellation.
- ePDCCH enhanced physical downlink control channel
- 3GPP standardization 3GPP standardization.
- the ePDCCH will not occupy the area of the previous PDCCH, but share the resources of the data domain with the PDSCH. based on Therefore, the configuration of the ePDCCH needs to be redesigned.
- some embodiments provide a communication method, device, and system, where the enhanced physical downlink control channel (ePDCCH) configuration scheme can effectively utilize downlink resources and improve transmission performance.
- ePDCCH enhanced physical downlink control channel
- a communication method for use in a wireless communication system can include: determining, by a base station in a communication system, a class of enhanced control channel element configurations in an enhanced physical downlink control channel according to a current system configuration of the communication system, wherein the enhanced control channel element configuration includes each Ensuring the number of resource particles in the control channel unit and the number of enhanced control channel elements in each physical resource block pair, and wherein the enhanced control channel unit configuration is classified into a plurality of different system configurations respectively corresponding to the communication system And notifying information about a category of the determined enhanced control channel element configuration to a terminal node in the communication system.
- a communication method for use in a wireless communication system may include: receiving, by a terminal node in a communication system, information about a class of enhanced control channel element configuration from a base station, the enhanced control channel element configuration including a number of resource particles in each enhanced control channel unit and each a number of physical resource block pairs, the number of enhanced control channel elements, and wherein the enhanced control channel unit configuration is classified into a plurality of categories respectively corresponding to different system configurations of the communication system; and configured according to the enhanced control channel unit The class performs enhanced control channel unit demodulation.
- a communication device for use in a wireless communication system.
- the communication device is configured in a base station of the communication system and includes: configuration class determining means for determining a class of the enhanced control channel element configuration in the enhanced physical downlink control channel according to a current system configuration of the communication system, wherein
- the enhanced control channel unit configuration includes the number of resource particles and each of the enhanced control channel elements And the number of the enhanced control channel elements, and wherein the enhanced control channel unit configuration is classified into a plurality of categories respectively corresponding to different system configurations of the communication system; and transmitting means for determining the relevant The information of the class of the enhanced control channel element configuration is notified to the terminal node in the communication system.
- a communication device for use in a wireless communication system.
- the communication device can be configured in a terminal node of the communication system and includes: receiving means for receiving information from the base station regarding a class of enhanced control channel element configuration, the enhanced control channel element configuration being included in each enhanced control channel unit The number of resource particles and the number of enhanced control channel elements in each physical resource block pair, and wherein the enhanced control channel element configuration is classified into a plurality of categories respectively corresponding to different system configurations of the communication system; And means for performing enhanced channel element demodulation according to the class of the enhanced control channel element configuration.
- a communication method for use in a wireless communication system comprising: determining, by a base station in a communication system, an enhanced physical downlink based on a current system configuration of the trusted system a class of enhanced control channel element configurations in the control channel, wherein the enhanced control channel element configuration includes the number of resource particles in each enhanced control channel unit and the number of enhanced control channel elements in each physical resource block pair, And wherein the enhanced control channel unit configuration is classified into a plurality of categories respectively corresponding to different system configurations of the communication system; the base station notifies information about the determined category of the enhanced control channel unit configuration to the communication a terminal node in the system; receiving, by the terminal node, information from the base station regarding a class of enhanced control channel element configuration; and enhancing, by the terminal node, an enhanced control channel according to a class configured by the enhanced control channel element Unit demodulation.
- a wireless communication system including a base station and a terminal node.
- the base station may include: configuration class determining means, configured to determine, according to a current system configuration of the communication system, a class of an enhanced control channel element configuration in an enhanced physical downlink control channel, where the enhanced control channel unit configuration includes The number of resource particles in the enhanced control channel unit and the number of enhanced control channel elements in each physical resource block pair, and wherein the enhanced control channel unit configuration is classified into respectively corresponding to different system configurations of the communication system a plurality of categories; a sending means for notifying information about a category of the determined enhanced control channel element configuration to a terminal node in the communication system.
- the terminal node may include: receiving means, configured to receive information about a category of the enhanced control channel unit configuration from the base station; and processing And means for performing enhanced control channel unit demodulation according to a category of the enhanced control channel unit configuration.
- the present disclosure also provides a computer program for implementing the above method.
- the present disclosure also provides a computer program product in the form of at least a computer readable medium having recorded thereon computer program code for implementing the above method.
- FIG. 1 is a schematic flow chart showing a communication method for use in a wireless communication system according to an embodiment
- FIG. 2 is a schematic flowchart showing one specific example of a communication method of dynamically selecting an enhanced control channel unit (eCCE) configuration adapted to a current system configuration;
- eCCE enhanced control channel unit
- FIG. 3 is a schematic flow chart showing a communication method for use in a wireless communication system according to an embodiment
- FIG. 4 is a schematic flow chart showing a specific example in which a terminal node receives eCCE configuration information
- FIG. 5 is a diagram showing an example of resource occupancy of a physical resource block pair in a system configuration
- FIG. 6 shows a schematic flow chart of a communication method according to another embodiment of the present disclosure
- FIGS. 7(A)-(D) are diagrams showing a specific example of an eCCE mapping manner
- Figure 8 is a schematic block diagram showing the structure of a communication device used in a radio system, according to one embodiment
- FIG. 9 is a schematic block diagram showing the structure of a communication device used in a radio system according to another embodiment. detailed description
- Some embodiments of the present disclosure provide a communication method and apparatus in a wireless communication system, and a communication system employing the same or using such a device, wherein a configuration scheme of an enhanced physical downlink control channel is employed (eg, including enhanced control)
- a configuration scheme of an enhanced physical downlink control channel is employed (eg, including enhanced control)
- the size of the channel unit and/or the multiplexing mode of the enhanced control channel unit in the resource block and/or the mapping demodulation scheme of the resource element (RE), etc. can effectively utilize the downlink resources and improve the transmission. Performance and compatibility with PDCCH in R 10.
- FIG. 1 is a flow chart showing a communication method for use in a wireless communication system according to an H-embodiment. The method shown in Fig. 1 is implemented on the base station side in the communication system.
- the method includes steps 102 and 104.
- step 102 the class of the enhanced control channel element (eCCE) configuration in the ePDCCH is determined by the base station in the communication system according to the current system configuration of the communication system.
- eCCE enhanced control channel element
- An ePDCCH can carry one or more eCCEs.
- the size of the eCCE that is, the number of resource elements (such as Resource Element, RE) in the eCCE, directly affects the capacity of the ePDCCH, the setting of the search space, and the link-level performance. Therefore, the size of the eCCE is an important indicator of the ePDCCH configuration.
- the eCCE configuration in the ePDCCH may include the size of each eCCE (ie, the number of resource particles in each eCCE) and each physical resource block pair (PRB pair). The number of eCCEs, etc.
- the eCCE configurations in the ePDCCH are classified into a plurality of categories respectively corresponding to different system configurations of the communication system.
- the various system configurations of the communication system can be divided into multiple categories, and correspondingly, eCCE configurations in different classes of ePDCCHs corresponding thereto can be defined, that is, each system configuration can correspond to the eCCE configuration of the corresponding category.
- the base station can dynamically select the eCCE configuration for the corresponding category based on the current system configuration of the communication system (step 102).
- step 104 the base station will allocate the relevant enhanced control channel unit The information of the set category is notified to the terminal node in the communication system.
- the terminal node refers to a user node UE in a communication system, such as a mobile terminal or the like.
- the base station may transmit the information about the determined class of enhanced control channel element configuration in any suitable manner.
- the information may be transmitted by using an extension of existing physical downlink control channel signaling (such as legacy PDCCH signaling in R10), that is, the information is encapsulated in extended physical downlink control.
- Channel signaling is sent to the terminal node.
- This method is very compatible with the original R10 version, using the original control resources.
- an enhanced physical downlink control channel signaling ePDCCH signaling
- ePDCCH signaling may be defined, encapsulated in the newly defined physical downlink control channel signaling, and transmitted to the terminal node. This method is simple and feasible, and only needs to add new signaling, which can be realized by occupying some blank resources.
- an enhanced physical control format indication channel signaling may be defined, encapsulated in the newly defined ePCFICH signaling and sent to the terminal node.
- ePCFICH signaling may be defined, encapsulated in the newly defined ePCFICH signaling and sent to the terminal node.
- the ePDCCH can be well distinguished from the previous PDCCH, which avoids confusion in use.
- the channel signaling may be indicated by a physical control format, and is not limited to any specific format and will not be described in detail herein.
- the eCCE configuration in the ePDCCH is classified into a plurality of categories respectively corresponding to different types of system configurations of the communication system, and the base station can select an eCCE corresponding thereto according to the current system configuration of the communication system. Configuration. In this way, resource waste can be reduced (i.e., the number of "blank REs" can be reduced), and link adaptation performance of the ePDCCH can be improved and possible signaling transmission overhead can be reduced.
- the system configuration of the communication system may include information such as the number of orthogonal frequency division multiplexing (OFDM) symbols carried by the physical downlink control channel and the number of reference signal ports.
- the number of OFDM symbols carried by the PDCCH and the number of reference signal ports affect the number of available REs of the ePDCCH. Therefore, the class of the enhanced control channel element configuration can be determined based on these configuration information.
- the base station may use the number of resource particles that can be used to carry the enhanced physical downlink control channel according to one physical resource block pair (or may be used to carry the enhanced physical downlink control channel according to one physical resource block pair). Determine the number of resource particles and the number of reference signal ports) Enhance the class of control channel unit configuration.
- Figure 5 shows the occupancy of a PRB pair in a system configuration, where a square represents an RE.
- the PDCCH occupies 2 OFDM symbols
- the common reference signal CRS uses 4 ports
- the demodulation reference signal DMRS uses 4 ports
- the remaining blank RE can be used to carry eCCE
- Table 1 shows the number of available REs in a PRB pair in a different system configuration in which the demodulation reference signal DMRS is set to use 4 ports, the PDCCH occupies a different number of OFDM symbols, and the CRS uses different port numbers.
- Table 2 shows the number of available REs in a PRB pair in a different system configuration in which the demodulation reference signal DMRS is set to use 2 ports, the PDCCH occupies a different number of OFDM symbols, and the CRS uses different port numbers.
- the enhanced control channel unit configuration can be classified into corresponding
- the information about the category may be referred to as a first signaling by a 2-bit signal, and the first letter is The order is sent to the terminal node.
- the signaling as described above may be an extension of the existing physical downlink control channel signaling, or may be
- the eCCE configuration in the ePDCCH can be classified into the following four types according to the number of resource particles that can be used to carry the enhanced physical downlink control channel:
- each eCCE may include 32 REs, and each physical resource block pair may carry 4 eCCEs;
- each eCCE may include 30 REs, and each physical resource block pair may carry 4 eCCEs;
- each eCCE may include 36 REs, and each physical resource block pair may carry 3 eCCEs;
- each RECCE may include 30 REs, and each physical resource block pair may carry 3 eCCEs.
- the eCCE configuration in the ePDCCH can be classified into the following four types according to the number of resource particles that can be used to carry the enhanced physical downlink control channel:
- each eCCE may include 34 REs, and each physical resource block pair may carry 4 eCCEs;
- Type 6 When the number of resource particles that can be used to carry the enhanced physical downlink control channel is between 128 and 134, each eCCE may include 32 REs, and each physical resource block pair may carry 4 eCCEs;
- Type 7 When the number of resource particles that can be used to carry the enhanced physical downlink control channel is between 116 and 122, each of the eCCEs may include 38 REs, and each physical resource block pair may carry 3 eCCEs;
- each RECCE may include 33 REs, and each physical resource block pair may carry 3 eCCEs.
- Tables 3 and 4 respectively show the relationship between the number of available REs in the above four types of eCCE configuration and the number of eCCEs and the number of eCCEs according to the system configuration of Tables 1 and 2.
- FIG. 2 shows a specific example of a communication method of dynamically selecting an eCCE configuration adapted to the current system configuration using the four types of eCCE configurations shown in Table 3.
- step 202-1 it is determined whether the fci of the resource particles that can be used to carry the enhanced physical downlink control channel is between 144 and 128, and if so, the eCCE configuration of the type 1 is selected in step 202-2; otherwise, processing Proceed to step 202-3.
- step 202-3 it is determined whether the number of resource particles that can be used to carry the enhanced physical downlink control channel is between 126 and 120. If yes, the eCCE configuration of the type 2 is selected in step 202-4; otherwise, processing Proceed to step 202-5.
- step 202-5 the judgment can be used to carry the enhanced physics. Whether the number of resource particles of the downlink control channel is between 114 and 108. If yes, the eCCE configuration of the type 3 is selected in step 202-6; otherwise, the eCCE configuration of the type 4 is selected in step 202-7. . Then, in step 204-1, the type information about the selected eCCE configuration is encapsulated in a 2-bit signaling (as a specific example, in the signaling, 00 can represent type 1, 01 can represent type 2, 10 can The representation type 3, 11 may represent type 4, etc., which is not described in detail herein, and in step 204-2, the signaling is sent to the terminal node.
- a 2-bit signaling as a specific example, in the signaling, 00 can represent type 1, 01 can represent type 2, 10 can The representation type 3, 11 may represent type 4, etc., which is not described in detail herein, and in step 204-2, the signaling is sent to the terminal node.
- one eCCE may be made in the ePDCCH.
- the number of REs varies between 30-38 (such as 30, 32, 36 or 38). This ensures that the downlink control information (DCI) carried in each eCCE is not too small or too much.
- DCI downlink control information
- the eCCE configuration is divided into four categories. With this method, the waste rate of downlink resources is low (calculated, about 4%, and the resource waste rate when the eCCE configuration is divided into two categories is 10). %about).
- the aggregated link adaptation process becomes complicated, and the signaling overhead required when the base station needs to inform the terminal node about the current eCCE configuration also increases as the eCCE configuration category increases.
- the first signaling requires only 2 bits. Therefore, by using the communication method shown in Fig. 3, a better balance between resource waste rate and signaling overhead can be obtained.
- the correspondence between different system configurations and eCCE configuration types may be pre-stored in a base station (such as a storage device stored in a base station).
- the base station can determine the corresponding eCCE configuration according to the stored correspondence when obtaining the current system configuration, and send information about its category to the terminal node.
- Various types of information about the eCCE configuration may be pre-stored in a terminal node (e.g., in a storage device stored in the terminal node). After obtaining the information about the category of the eCCE configuration from the base station, the terminal node may query the information corresponding to the category according to the information stored in the category.
- FIG. 3 is a schematic flow chart showing a communication method for receiving enhanced control channel unit configuration information on the terminal node side corresponding to the method shown in FIG. 1. As shown in FIG. 3, the method may include steps 302 and 304.
- step 302 the terminal node receives the relevant enhanced control channel unit from the base station Information about the configured category.
- the enhanced control channel element configuration described herein includes the number of resource particles in each enhanced control channel unit and the number of enhanced control channel elements in each physical resource block pair. Wait. Additionally, the enhanced control channel element configuration is classified into a plurality of categories respectively corresponding to different system configurations of the communication system. It will not be described in detail here.
- the terminal node performs enhanced control channel unit demodulation according to the type of the enhanced control channel element configuration. Specifically, after obtaining the information about the category of the eCCE configuration from the base station, the terminal node may query the configuration information corresponding to the category in the pre-stored information about the multiple eCCE configurations according to the category, and according to the configuration information, according to the configuration information. To perform demodulation of eCCE.
- the eCCE configuration can be classified into four categories, for example, the four types shown in Table 3 or Table 4 above.
- the base station can send information indicating the class of the eCCE configuration corresponding to the current system configuration by using 2-bit signaling (such as the first signaling) (as shown in steps 204-1 and 204-2 of FIG. 2).
- the terminal node can obtain related information by receiving signaling (e.g., first signaling) encapsulated in 2 bits for indicating an enhanced control channel unit configuration category.
- the terminal node may obtain information about the eCCE configuration category through a Physical Control Format Indication Channel (PCFICH).
- PCFICH Physical Control Format Indication Channel
- This method can well inherit the channel features in the original R10 version and is compatible with it. It does not need to add other signaling information.
- the PCFICH refers to a physical format indication channel dedicated to indicating the number of OFDM symbols occupied by the PDCCH.
- the PCFICH is placed in the first OFDM symbol of each subframe and has a size of 2 bits, which actually divides the boundary between the control signaling region and the data region in each subframe.
- FIG. 4 shows a specific example of receiving eCCE configuration information using the PCFICH. As shown in FIG.
- the terminal node receives the physical control format indication channel information. Specifically, the terminal node obtains the number of OFDM symbols occupied by the PDCCH transmission in the current system configuration by demodulating the PCFICH information. Then, in step 402-2, the number of resource particles that can be used to carry the enhanced physical downlink control channel is calculated according to the physical control format indication channel information. Specifically, the terminal node may use the PCFICH information to obtain the number of CRS ports by using system information, and then calculate the number of REs currently available for carrying the ePDCCH. In step 402-3, the terminal node queries the pre-stored enhanced control channel unit configuration table (eg, The information shown in Table 2) is used to obtain the category of the eCCE configuration.
- the pre-stored enhanced control channel unit configuration table eg, The information shown in Table 2
- FIG. 6 shows a communication method according to another embodiment disclosed in the present invention, wherein the base station further determines a mapping manner of the enhanced control channel unit in the physical resource block pair.
- the base station determines a mapping manner of the enhanced control channel unit in the physical resource block pair.
- a plurality of enhanced channel control units in each physical resource block pair may be consecutively mapped into a plurality of resource particles of the physical resource block pair in a diagonal arrangement.
- the so-called diagonal arrangement means that in each PRB pair, the same eCCE is continuously and locally localized in a diagonal arrangement to the available REs. This makes the mapping law simple in actual operation, which makes the actual mapping algorithm easier to implement.
- the above-mentioned diagonal arrangement mapping method actually uses a multiplexing method combining time division multiplexing and frequency division multiplexing to multiplex multiple eCCEs in one PRB pair, and time division multiplexing can reduce coding delay.
- the power balance can be realized by frequency division multiplexing, and the combination of the two can combine the above advantages of time division multiplexing and frequency division multiplexing.
- FIGs 7(A)-(D) are diagrams showing the continuous mapping of eCCEs in a diagonal arrangement in different types of eCCE configurations, respectively.
- 7(A) shows an example of mapping when the type 1 eCCE configuration is employed
- FIG. 7(B) shows an example of mapping when the type 2 eCCE configuration is employed
- FIG. 7(C) shows the adoption type.
- FIG. 7(D) shows an example of mapping when eCCE configuration of type 4 is employed.
- the base station notifies the terminal node of the information about the mapping mode. It should be noted that the above step 608 is optional.
- the base station does not need to send information about the mapping mode to the terminal node, as long as the mapping method used in various types of eCCE configurations is agreed with the terminal node in advance.
- the terminal node may perform demodulation according to a pre-agreed mapping manner corresponding to the category.
- the terminal node may follow the pair
- the angular arrangement continuously demodulates a plurality of resource particles in a pair of physical resource blocks to obtain respective enhanced channel control units.
- unoccupied resource particles in a physical resource block pair may be uniformly mapped after each enhanced channel control unit. In this case, after the terminal node completes demodulation for each enhanced channel control unit, the unoccupied resource particles are vacated without demodulation.
- the base station station obtains the current system configuration, and then calculates the number of REs available for ePDCCH transmission according to the current system configuration. It is assumed that, under the eCCE configuration of the type corresponding to the current system configuration, the size of each eCCE is n and the number of eCCEs carried in each pair of PRBs is x, the base station can calculate each eCCE mapping by using the following formula (1).
- the symbol " 1 "" means rounding down. If it can be divisible, the number of blank REs after each eCCE is equal, otherwise the last redundant RE is mapped to the last eCCE.
- the base station by calculating the value of Y, vacates Y REs after each ePDCCH information of n REs is mapped.
- the base station can pre-determine information about the mapping pattern with the terminal node.
- the base station may send information about the mapping pattern to the terminal node.
- the terminal node obtains the eCCE configuration information in the current system configuration (as in the above method, it is not repeated here). Specifically, the size n of each eCCE and the number x of eCCEs carried in each pair of PRBs are obtained.
- the terminal node obtains the number of REs that need to be vacated after each eCCE is demodulated.
- the base station may be notified to the terminal node by signaling.
- the terminal node can calculate ⁇ using the following equation (2).
- the terminal node can obtain the current system configuration by demodulating the system signaling and the original control channel information, and obtain the number of REs available for ePDCCH transmission according to the current system configuration (for example, Table 1).
- the terminal node calculates the number of REs that need to be vacated after demodulation of each eCCE by the following equation (2):
- the terminal node vacates Y REs after demodulating the ePDCCH information of n REs without demodulation.
- unoccupied resource particles in a physical resource block pair may be uniformly mapped before each enhanced channel control unit.
- the unoccupied resource particles are skipped without being demodulated. The specific steps are similar to the above examples, and are not described here.
- the base station may further utilize the unoccupied resource particles (blank RE) of the enhanced physical downlink control channel to include signaling for indicating information of a class of the eCCE configuration corresponding to the current system configuration (eg, A signaling) is sent to the terminal node.
- the unoccupied resource particles in the physical resource block pair may be uniformly mapped before each enhanced channel control unit, in which case the blank RE located before the eCCE may be used to carry the first signaling. .
- the terminal node first demodulates the first signaling and then demodulates the eCCE.
- the first signaling may be placed in another blank RE, and the terminal node receives the information about the mapping pattern sent by the base station (or the information according to the mapping pattern pre-agreed with the base station), and first demodulates the first signal according to the information. Let, in turn, demodulate the eCCE.
- the signaling using the blank RE to carry information indicating the class of the eCCE configuration corresponding to the current system configuration does not require occupying new resources, and can better utilize resources that may be wasted.
- multiple enhanced channel control units in each physical resource block pair are successively mapped in a diagonal arrangement to a plurality of resource particles of the physical resource block pair, and the physical downlink is enhanced.
- the control channel can be mapped to a physical resource block pair in a centralized manner, or can be mapped to multiple physical resource block pairs in a distributed manner.
- the terminal node can perform demodulation of the enhanced control channel unit on one physical resource block pair to obtain an enhanced physical downlink control channel.
- the terminal node may perform demodulation of the enhanced control unit on the plurality of physical resource block pairs to obtain an enhanced physical downlink control channel.
- the communication device 800 can be configured in a base station of a communication system.
- the communication device 800 can include a configuration category determining device 801 and a transmitting device 803.
- the communication device 800 can employ the method described above with reference to Figures 1-7.
- configuration The class determining means 801 can determine the class of the enhanced control channel element configuration in the enhanced physical downlink control channel based on the current system configuration of the communication system.
- the enhanced control channel element configuration may include the number of resource particles in each enhanced control channel unit and the number of enhanced control channel elements in each physical resource block pair, and the like; and the enhancement The control channel unit configuration is classified into a plurality of categories and the like corresponding to different system configurations of the communication system, respectively.
- the system configuration may include the number of orthogonal frequency division multiplexing symbols and the number of reference signal ports carried by the physical downlink control channel.
- the configuration class determining means 801 can determine the class of the enhanced control channel unit configuration based on the number of resource particles available for carrying the enhanced physical downlink control channel in one physical resource block pair.
- the enhanced control channel unit configuration can be classified into four categories respectively corresponding to different system configurations of the communication system. For example, the four types described above with reference to Table 3 or Table 4 are not repeated here.
- the transmitting means 803 is for notifying information on the class of the enhanced control channel unit configuration determined by the determining means 801 to the terminal node in the communication system.
- the transmitting device 803 can configure the determined enhanced control channel unit configuration.
- the information of the class is encapsulated in 2-bit signaling (such as the first signaling), and the first signaling is sent to the terminal node.
- the first signaling may be an extension of existing PDCCH signaling, or may use ePDCCH signaling or ePCFICH signaling.
- the first signaling can be transmitted using the blank RE of the ePDCCH, which is not repeated here.
- the device 800 may further include mapping mode determining means 805.
- the mapping mode determining means 805 can determine the manner in which the enhanced resource channel elements are mapped in the physical resource block pair using the method described above with reference to Figures 6-7. For example, multiple enhanced channel control units in a physical resource block pair may be consecutively mapped to a plurality of resource particles of the physical resource block pair in a diagonal arrangement manner (as shown in FIG. 7); for example, physical resource block alignment Unoccupied resource particles can be evenly mapped after each enhanced channel control unit and will not be repeated here.
- the transmitting device 803 can transmit information about the mapping mode to the terminal node.
- the transmitting device 803 can transmit the information in any suitable manner and will not be described in detail herein.
- the communication device 900 is configured in a terminal node of a communication system. As shown in FIG. 9, the communication device 900 includes a receiving device 901 and a processing device 903.
- the communication device 900 can employ the method described above with reference to Figures 1-7.
- receiving device 901 can receive information from the base station regarding the class of enhanced control channel element configuration.
- the enhanced control channel unit configuration may include the number of resource particles in each enhanced control channel unit and the number of enhanced control channel elements in each physical resource block pair, and the like, and the enhanced control channel unit configurations are classified into separate Multiple categories corresponding to different system configurations of the communication system are not repeated here.
- Processing device 903 can be operative to perform enhanced control channel unit demodulation in accordance with the type of enhanced control channel unit configuration. Specifically, after obtaining the information about the category of the eCCE configuration from the base station, the processing device 903 may query the configuration information corresponding to the category in the pre-stored information about the multiple eCCE configurations according to the category, and according to the configuration, according to the configuration. Information for demodulation of eCCE.
- control channel unit configuration may be classified into four categories (for example, as shown in Table 3 or Table 4 above, when the DMRS adopts 4 ports, it is classified into types 1-4; or, when When DMRS uses 2 ports, it is divided into types 5-8).
- the receiving device 901 may receive the first signaling, and The processing device 903 parses the first signaling to obtain the information indicating the configuration type of the enhanced control channel unit, thereby performing enhanced channel element demodulation.
- the terminal node may obtain information about the eCCE configuration category through a Physical Control Format Indication Channel (PCFICH).
- PCFICH Physical Control Format Indication Channel
- the receiving device 901 can receive physical control format indication channel information.
- the processing device 903 may calculate the number of resource particles that can be used to carry the enhanced physical downlink control channel according to the physical control format indication channel information, and obtain the enhanced control channel unit configuration by querying a pre-stored enhanced control channel unit configuration table. Category.
- the receiving device 901 can also receive information from the base station regarding the manner in which the enhanced control channel elements are mapped in the pair of physical resource blocks.
- the processing device 903 may follow The plurality of resource particles in the pair of physical resource blocks are successively demodulated in a diagonally aligned manner to obtain respective enhanced channel control units.
- unoccupied resource particles in a physical resource block pair may be uniformly mapped after each enhanced channel control unit.
- the processing device 903 completes demodulation for each of the enhanced channel control units, the unoccupied resource particles are vacated without demodulation.
- unoccupied resource particles in a physical resource block pair may be uniformly mapped before each enhanced channel control unit. In this case, before the processing device 903 demodulates each of the enhanced channel control units, the unoccupied resource particles are skipped without demodulation.
- the enhanced physical downlink control channel may be mapped to a physical resource block pair in a centralized manner, or may be mapped to multiple physical resource block pairs in a distributed manner. Accordingly, in the above centralized manner, the processing device 903 can collectively perform demodulation of the enhanced control channel unit for one physical resource block pair to obtain an enhanced physical downlink control channel. In the above distributed manner, the processing device 903 can perform demodulation of the enhanced control unit on the plurality of physical resource block pairs to obtain an enhanced physical downlink control channel.
- a wireless communication system comprising a base station and a terminal node
- the base station comprises a communication device (such as 800) configured on the base station side as described above
- the terminal node Including the communication device (such as 900) configured on the terminal node side as described above
- the various steps of the above method, as well as the various constituent modules and/or devices of the above-described devices, may be implemented as software, firmware, hardware, or a combination thereof.
- the various components, units and subunits of the above apparatus may be configured by software, hardware or a combination thereof.
- the specific means or manner in which the configuration can be used is well known to those skilled in the art and will not be described again.
- Storage media includes, but is not limited to, a floppy disk, an optical disk, a magneto-optical disk, a memory card, a memory stick, and the like.
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Abstract
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BR112014028175A BR112014028175A2 (pt) | 2012-05-18 | 2013-04-23 | método e aparelho de comunicação para uso em um sistema de comunicação sem fio, e, sistema de comunicação sem fio |
CA2872824A CA2872824C (en) | 2012-05-18 | 2013-04-23 | Communication method and device in wireless communication system |
IN10210DEN2014 IN2014DN10210A (zh) | 2012-05-18 | 2013-04-23 | |
AU2013262263A AU2013262263B2 (en) | 2012-05-18 | 2013-04-23 | Communication method and device in wireless communication system |
EP13790305.0A EP2852235A4 (en) | 2012-05-18 | 2013-04-23 | METHOD AND DEVICE FOR COMMUNICATION IN A WIRELESS COMMUNICATION SYSTEM |
RU2014151226/07A RU2582597C1 (ru) | 2012-05-18 | 2013-04-23 | Способ связи и устройство связи в системе беспроводной связи |
JP2015511911A JP2015521433A (ja) | 2012-05-18 | 2013-04-23 | 無線通信システムにおける通信方法及びデバイス |
MX2014013877A MX340765B (es) | 2012-05-18 | 2013-04-23 | Metodo y dispositivo de comunicacion en sistema de comunicacion inalambrica. |
KR1020147034821A KR101669353B1 (ko) | 2012-05-18 | 2013-04-23 | 무선 통신 시스템에서의 통신 방법 및 디바이스 |
US14/400,591 US20150098405A1 (en) | 2012-05-18 | 2013-04-23 | Communication method and device in wireless communication system |
ZA2014/09004A ZA201409004B (en) | 2012-05-18 | 2014-12-08 | Communication method and device in wireless communication system |
US16/412,449 US20190274123A1 (en) | 2012-05-18 | 2019-05-15 | Communication method and device in wireless communication system |
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CN102170703A (zh) * | 2011-05-11 | 2011-08-31 | 电信科学技术研究院 | 一种物理下行控制信道上的信息收发方法及设备 |
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IN2014DN10210A (zh) | 2015-08-07 |
MX2014013877A (es) | 2015-02-12 |
EP2852235A1 (en) | 2015-03-25 |
US20190274123A1 (en) | 2019-09-05 |
AU2013262263A1 (en) | 2014-11-20 |
CA2872824C (en) | 2017-05-02 |
US20150098405A1 (en) | 2015-04-09 |
KR20150013753A (ko) | 2015-02-05 |
CN110266458B (zh) | 2022-07-12 |
AU2013262263B2 (en) | 2015-11-12 |
RU2582597C1 (ru) | 2016-04-27 |
CA2872824A1 (en) | 2013-11-21 |
MX340765B (es) | 2016-07-25 |
JP2017163578A (ja) | 2017-09-14 |
KR101669353B1 (ko) | 2016-10-25 |
JP2015521433A (ja) | 2015-07-27 |
EP2852235A4 (en) | 2016-01-13 |
CN103428860B (zh) | 2019-07-09 |
CN110266458A (zh) | 2019-09-20 |
BR112014028175A2 (pt) | 2017-06-27 |
JP6399143B2 (ja) | 2018-10-03 |
CN103428860A (zh) | 2013-12-04 |
ZA201409004B (en) | 2015-02-25 |
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