WO2012171395A1 - Method, system, and device for allotting and determining pdcch - Google Patents

Abstract

Embodiments of the present application relate to the technical field of wireless communications, and relate specifically to a method, system, and device for allotting and determining a physical downlink control channel (PDCCH), applicable in allotting PDCCH resources under an enhanced PDCCH scheme. Provided in the embodiments of the present invention, the method for allotting the PDCCH comprises: a network side notifying a user equipment of corresponding thereto a transmission mode of a physical downlink shared channel (PDSCH); the network side allotting corresponding PDCCH resources to the user equipment on the basis of the transmission mode of the PDSCH corresponding to the user equipment; and the PDCCH resources comprising a legacy PDCCH domain and an enhanced PDCCH domain. Because the allotment of the PDCCH resource is allowed under the enhanced PDCCH scheme, effective transmission and reception of the PDCCH is thereby ensured.

Description

 The present invention claims to be submitted to the Chinese Patent Office on June 17, 2011, the application number is 201110164810.7, and the invention name is "a method, system and device for allocating and determining PDCCH". Priority of Chinese Patent Application, the entire contents of which is incorporated herein by reference. Technical field

 The present invention relates to the field of wireless communication technologies, and in particular, to a method, system, and device for allocating and determining a PDCCH. Background technique

 In a Long Term Evolution (LTE) system, a Physical Downlink Control Channel (PDCCH) is transmitted in each radio subframe and shared with a physical downlink (Physical Downlink Shared Channel). , PDSCH ) forms the relationship of Time Division Multiple (TDM). The PDCCH is transmitted through the first N Orthogonal Frequency Division Multiplexing (OFDM) symbols of one downlink subframe.

 The control region for transmitting the PDCCH in the LTE system is composed of logically divided Control Channel Elements (CCEs). The downlink control information (DCI) is also based on the CCE. A DCI for a User Equipment (UE) can be sent in N consecutive CCEs. In the LTE system, the N is possible. The value is 1, 2, 4, and 8 and is called the CCE aggregation level. The UE performs PDCCH blind detection in the control region to search whether there is a PDCCH for the PDCCH. The blind detection uses the UE's Radio Network Temporary Identifier (RNTI) to decode different DCI formats and CCE aggregation levels. Attempt, if the decoding is correct, the DCI for the UE is received. The LTE UE needs to perform blind detection on the control region for each downlink subframe in the non-DRX (Discontinuous Reception) state to search for the PDCCH.

The control area in one subframe of the LTE system is composed of two spaces, namely, a Common Search Space (CSS) and a UE-specific Search Space (UESS). The common search space is mainly used for transmitting the DCI of the scheduling cell-specific control information (such as system information, paging message, multicast power control information, etc.) of the user equipment, and the user equipment exclusive search space is mainly used for transmitting the scheduling for each UE resource. DCI. The common search space in each downlink subframe includes the first 16 CCEs, and the CCE aggregation level in the common search space only supports 4, 8; the starting CCE of the UE search space exclusive to each user equipment in each downlink subframe The location is related to the subframe number, the RNTI of the UE, etc., and the CCE aggregation level 1 , 2, 4, 8 is supported in the user equipment exclusive search space. In UES S, blind detection of each aggregation level corresponds to one search space, that is, UEs blindly check different aggregation levels are different The search space is carried out within.

 In order to further increase the demand for PDCCH channel capacity, the PDCCH is enhanced. For the enhanced PDCCH, the current scheme is to transmit the enhanced PDCCH in the PDSCH domain in the downlink subframe while retaining the original PDCCH domain. The original PDCCH domain still uses the existing transmission and reception technologies, and uses the original PDCCH resources, such as transmit diversity when transmitting, and uses cell-specific reference signal (CRS) for blind detection when receiving. The technology performs blind detection on the DCI in the common search space and the user equipment-specific search space, and occupies the first N OFDM symbols, where N may take values of 1, 2, 3, 4, and N=4 is only allowed to appear in the system bandwidth. In a 1.4 MHz system, this part of the PDCCH domain is called a legacy PDCCH domain. The enhanced PDCCH domain can use more advanced transmission and reception technologies, and use some resources of the original PDSCH, such as precoding during transmission, and based on UE-Specific Reference Signal (UE-RS). That is, the Demodulation Reference Symbol (DMRS) is used for detection, and the time-frequency resource transmission outside the Legacy PDCCH domain is occupied. This part of the PDCCH domain is called an Enhanced PDCCH domain.

 The PDCCH resources of the Long Term Evolution-Advanced (LTE-A) system after the PDCCH is enhanced will include the legacy PDCCH domain (legacy PDCCH) and the enhanced PDCCH domain (Enhanced PDCCH). The existing version of the user equipment (for example, Rel-8/9/lO) cannot support DCI reception in the Enhanced PDCCH region. Therefore, the DCI of all the old user equipments is still allocated in the Legacy PDCCH domain, and the new version of the user equipment (for example, Rel- The DCI of 11 or / and other higher versions can be transmitted either in the Legacy PDCCH domain or in the Enhanced PDCCH domain. In the process of receiving the PDCCH, the new version of the user equipment needs to know whether the PDCCH corresponding to itself is in the Legacy PDCCH domain or the E-PDCCH domain. However, there is no scheme for allocating PDCCH resources under enhanced PDCCH in the current scheme. Summary of the invention

 A method, system and device for allocating and determining a PDCCH according to an embodiment of the present invention are used to allocate a PDCCH resource under a PDCCH enhancement scheme.

 A method for a PDCCH according to an embodiment of the present invention includes:

 The network side notifies the transmission mode of the PDSCH corresponding to the user equipment;

 The network side allocates a corresponding PDCCH resource to the user equipment according to a transmission mode of the PDSCH corresponding to the user equipment;

 The PDCCH resource includes a Legacy PDCCH domain and an Enhanced PDCCH domain.

 A method for determining a PDCCH according to an embodiment of the present invention includes:

 Determining, by the user equipment, a transmission mode of the corresponding PDSCH notified by the network side;

 Determining, by the user equipment, a PDCCH resource according to a transmission mode of the corresponding PDSCH;

The PDCCH resource includes a legacy PDCCH domain and an enhanced PDCCH domain. A network side device for allocating a PDCCH according to an embodiment of the present invention includes:

 a notification module, configured to notify a user of a PDSCH transmission mode corresponding to the device;

 An allocating module, configured to allocate a corresponding PDCCH resource to the user equipment according to a transmission mode of a PDSCH corresponding to the user equipment;

 The PDCCH resource includes a Legacy PDCCH domain and an Enhanced PDCCH domain.

 A user equipment for determining a PDCCH according to an embodiment of the present invention includes:

 a transmission mode determining module, configured to determine a transmission mode of the corresponding PDSCH that is notified by the network side;

 And a resource determining module, configured to determine a PDCCH resource according to a transmission mode of the corresponding PDSCH, where the PDCCH resource includes a Legacy PDCCH region and an Enhanced PDCCH region.

 A system for determining a PDCCH according to an embodiment of the present invention includes:

 a network side device, configured to notify a transmission mode of the PDSCH corresponding to the user equipment, and allocate a corresponding PDCCH resource to the user equipment according to a transmission mode of the PDSCH corresponding to the user equipment;

 a user equipment, configured to determine a transmission mode of the corresponding PDSCH that is notified by the network side, and determine a PDCCH resource according to the corresponding transmission mode of the PDSCH;

 The PDCCH resource includes a Legacy PDCCH domain and an Enhanced PDCCH domain.

 The PDCCH resources can be allocated under the PDCCH enhancement scheme, so that the effective transmission and reception of the PDCCH can be ensured;

 Further, reasonable allocation of PDCCH resources and avoiding unnecessary signaling overhead are avoided. DRAWINGS

 FIG. 1 is a schematic structural diagram of a system for determining a PDCCH according to an embodiment of the present disclosure;

 2 is a schematic structural diagram of a network side device for allocating a PDCCH according to an embodiment of the present disclosure;

 FIG. 3 is a schematic structural diagram of a user equipment for determining a PDCCH according to an embodiment of the present disclosure;

 FIG. 4 is a schematic flowchart of a method for allocating a PDCCH according to an embodiment of the present disclosure;

 FIG. 5 is a schematic flowchart of a method for determining a PDCCH according to an embodiment of the present invention. detailed description

 In the embodiment of the present invention, the network side notifies the transmission mode of the PDSCH corresponding to the user equipment, and allocates a corresponding PDCCH resource to the user equipment according to the transmission mode of the PDSCH corresponding to the user equipment; where the PDCCH resource includes a legacy PDCCH domain and an enhanced PDCCH domain. Since PDCCH resources can be allocated under the PDCCH enhancement scheme, efficient transmission and reception of the PDCCH can be ensured.

The Legacy PDCCH region is: using some resources in the control region defined in the existing LTE/LTE-A standard (eg, Rel-8/9/10) (eg, occupying the first N OFDM symbols, where N Possible values are 1, 2, 3, 4, N=4 is only allowed in systems with a system bandwidth of 1.4 MHz. The CRS is used for channel measurement and demodulation, and the part of the PDCCH region for DCI transmission in single port or transmit diversity mode is used.

 The Enhanced PDCCH field is: Used in subsequent LTE-A standards (eg, Rel-11 or/and other higher versions), as defined in existing LTE/LTE-A standards (eg, Rel-8/9/lO) The portion of the PDCCH region in which the DCI transmission is performed by some resources in the data region (eg, other OFDM symbols outside the control region).

 In the following description, the implementation of the cooperation between the network side and the user equipment side will be described first. Finally, the implementations from the network side and the user equipment side will be described separately, but this does not mean that the two must be implemented together. In fact, When the network side is implemented separately from the user equipment side, the problems existing on the network side and the user equipment side are also solved, but when the two are combined, a better technical effect is obtained.

 As shown in FIG. 1, the system for determining a PDCCH according to an embodiment of the present invention includes: a network side device 10 and a user equipment 20. The network side device 10 is configured to notify the user equipment 20 of the PDSCH transmission mode, according to the user equipment.

The transmission mode of the corresponding PDSCH is 20, and the corresponding PDCCH resource is allocated to the user equipment 20;

 The user equipment 20 is configured to determine a transmission mode of the corresponding PDSCH that is notified by the network side, according to the corresponding

a transmission mode of the PDSCH, determining a PDCCH resource;

 The PDCCH resource includes a Legacy PDCCH domain and an Enhanced PDCCH domain.

 Preferably, the network side device 10 notifies the transmission mode of the PDSCH corresponding to the user equipment 20 by high layer signaling. For example, use the transmissionMode in the high-level signaling AntennalnfoDedicated field to indicate.

 If the embodiment of the present invention is applied to the LTE-A system, the specific content of the transmission mode can be seen in Table 1:

DCI 格 CSS和 C-RNTI

DCI grid CSS and C-RNTI

 Send diversity

 UESS corresponding to mode 1A

 4 DCI grid corresponding to C-RNTI

 Closed-loop space division multiplexing or transmit diversity 2 UESS

 DCI grid CSS and C-RNTI

 Send diversity

 UESS corresponding to mode 1A

 5 DCI grid corresponding to C-RNTI

 MU-MIMO

 UDS of type 1D

 DCI grid CSS and C-RNTI

 Send diversity

 UESS corresponding to mode 1A

 6 DCI grid corresponding to C-RNTI

 Single-layer closed-loop space division multiplexing 1B UESS

 If the PBCH is a single port, then

DCI grid CSS and C-RNTI

 Single port, port 0; otherwise, send the UESS corresponding to the split mode 1A

 7

 DCI grid corresponding to C-RNTI

 Single port, port 5

 UESS of Equation 1

 If the PBCH is a single port, then

DCI grid CSS and C-RNTI

 Single port, port 0; otherwise, send the UESS corresponding to the split mode 1A

 8

 DCI grid C-RNTI corresponds to double layer transmission, ports 7 and 8; or 2B UESS single layer transmission, port 7 or 8

 In a non-MBSFN sub-frame, if the PBCH is a single port, the single port, the end

DCI grid CSS and C-RNTI

 Port 0; otherwise, send diversity; UESS corresponding to mode 1A

 MBSFN child allocated in unicast

9

 Frame, single port, port 7

 DCI grid corresponding to C-RNTI

 Up to 8 layers of transmission, port 7~14 type 2C UESS

 Table 1

The network side allocates corresponding PDCCH resources to the user equipment according to the PDSCH transmission mode corresponding to the user equipment. Several types are listed below. In a first mode, if the transmission mode of the PDSCH corresponding to the user equipment 20 is based on the CRS for channel measurement and signal demodulation, the network side device 10 allocates the CSS and the UESS corresponding to the user equipment to the legacy PDCCH domain;

 Correspondingly, if the transmission mode of the corresponding PDSCH is based on CRS for channel measurement and signal demodulation, the user equipment 20 determines that the corresponding CSS and UESS are in the Legacy PDCCH domain.

 For the LTE-A system, the transmission mode of the PDSCH based on CRS for channel measurement and signal demodulation is transmission mode 1~6, see Table 1.

 Manner 2: If the transmission mode of the PDSCH corresponding to the user equipment 20 is based on CRS for channel measurement and is demodulated based on the port 5 or CRS of the UE-RS (equivalent to DMRS, the same below), the network side device 10 will be the user. The CSS and UESS corresponding to the device 20 are allocated to the Legacy PDCCH domain;

 Correspondingly, if the transmission mode of the corresponding PDSCH is based on CRS for channel measurement and demodulated based on the UE-RS port 5 or CRS, the user equipment 20 determines that the corresponding CSS and UESS are in the Legacy PDCCH domain.

 For the LTE-A system, the transmission mode of the PDSCH based on the CRS for channel measurement and based on the UE-RS port 5 or CRS is the transmission mode 1~7, see Table 1.

 Manner 3: If the transmission mode of the PDSCH corresponding to the user equipment 20 is based on the CRS for channel measurement, the network side device 10 allocates the CSS and the UESS corresponding to the user equipment 20 to the legacy PDCCH domain; correspondingly, if corresponding The transmission mode of the PDSCH is based on CRS for channel measurement, and the user equipment 20 determines that the corresponding CSS and UESS are in the Legacy PDCCH domain.

 For the LTE-A system, the transmission mode of the PDSCH based on CRS for channel measurement is the transmission mode 1~8, see Table 1.

 Mode 4: If the transmission mode of the PDSCH corresponding to the user equipment 20 is not based on the CRS for channel measurement and signal demodulation, the network side device 10 allocates the CSS corresponding to the user equipment 20 to the legacy PDCCH domain, and allocates the UESS. To the Enhanced PDCCH field;

 Correspondingly, if the transmission mode of the corresponding PDSCH is not based on CRS for channel measurement and signal demodulation, the user equipment 20 determines that the corresponding CSS is in the Legacy PDCCH domain, and the UESS is in the Enhanced PDCCH region.

 Certainly, for the transmission mode that does not perform channel measurement and signal demodulation based on the CRS, other allocation methods may be used, for example, the CSS and the UESS corresponding to the user equipment 20 are allocated to the Enhanced PDCCH domain; The CSS is in the Enhanced PDCCH domain and the UESS is in the legacy PDCCH domain.

Manner 5: If the transmission mode of the PDSCH corresponding to the user equipment 20 is not based on CRS for channel measurement and is not demodulated based on the port 5 or CRS of the UE-RS, the network side device 10 sets the CSS corresponding to the user equipment 20. Assigned to the legacy PDCCH domain, the UESS is assigned to the Enhanced PDCCH domain; Correspondingly, if the transmission mode of the corresponding PDSCH is not based on CRS for channel measurement and is not demodulated based on the UE-RS port 5 or CRS, the user equipment 20 determines that the corresponding CSS is in the Legacy PDCCH domain, UESS In the Enhanced PDCCH field.

 Certainly, for the transmission mode that does not perform channel measurement and signal demodulation based on the CRS, other allocation methods may be used, for example, the CSS and the UESS corresponding to the user equipment 20 are allocated to the Enhanced PDCCH domain; The CSS is in the Enhanced PDCCH domain and the UESS is in the legacy PDCCH domain.

 Mode 6: If the transmission mode of the PDSCH corresponding to the user equipment 20 is not based on the CRS for channel measurement, the network side device 10 allocates the CSS corresponding to the user equipment 20 to the legacy PDCCH domain, and allocates the UESS to the Enhanced PDCCH domain. Medium

 Correspondingly, if the transmission mode of the corresponding PDSCH is not based on CRS for channel measurement, the user equipment 20 determines that the corresponding CSS is in the Legacy PDCCH domain, and the UESS is in the Enhanced PDCCH domain.

 Certainly, for the transmission mode that does not perform channel measurement and signal demodulation based on the CRS, other allocation methods may be used, for example, the CSS and the UESS corresponding to the user equipment 20 are allocated to the Enhanced PDCCH domain; The CSS is in the Enhanced PDCCH domain and the UESS is in the legacy PDCCH domain.

 In a specific implementation, the allocation may be performed in any of the above manners; and the foregoing may be performed in multiple ways without conflict.

 The network side device in the embodiment of the present invention may be a station (such as a macro base station, a home base station, etc.), or may be an RN (Relay Node) device having an independent cell identifier (cell ID). It can also be other network side devices.

 Based on the same inventive concept, a network side device, a user equipment, a method for allocating a PDCCH, and a method for determining a PDCCH are further provided in the embodiment of the present invention. The principles for solving the problem are similar to the system for determining a PDCCH. The implementation of the device and method can be referred to the implementation of the system, and the details are not repeated here.

 As shown in FIG. 2, the network side device that allocates the PDCCH in the embodiment of the present invention includes: a notification module 200 and a distribution module 210.

 The notification module 200 is configured to notify a transmission mode of the PDSCH corresponding to the user equipment;

 The allocating module 210 is configured to allocate a corresponding PDCCH resource to the user equipment according to the transmission mode of the PDSCH corresponding to the user equipment;

 The PDCCH resource includes a Legacy PDCCH domain and an Enhanced PDCCH domain.

 Preferably, if the transmission mode of the PDSCH corresponding to the user equipment is based on the CRS for channel measurement and signal demodulation, the allocation module 210 allocates the CSS and the UESS corresponding to the user equipment to the Legacy PDCCH domain.

 Preferably, if the transmission mode of the PDSCH corresponding to the user equipment is based on CRS, the channel measurement is based on

If the port 5 or the CRS of the UE-RS is demodulated, the allocation module 210 allocates the CSS and the UESS corresponding to the user equipment to the legacy PDCCH domain. Preferably, if the transmission mode of the PDSCH corresponding to the user equipment is based on the CRS for channel measurement, the allocation module 210 allocates the CSS and the UESS corresponding to the user equipment to the legacy PDCCH domain.

 As shown in FIG. 3, the user equipment that determines the PDCCH in the embodiment of the present invention includes: a transmission mode determining module 300 and a resource determining module 310.

 The transmission mode determining module 300 is configured to determine a transmission mode of the corresponding PDSCH that is notified by the network side, and the resource determining module 310 is configured to determine a PDCCH resource according to the corresponding transmission mode of the PDSCH, where the PDCCH resource includes a legacy PDCCH domain and Enhanced PDCCH domain.

 Preferably, if the transmission mode of the corresponding PDSCH is based on the cell level reference signal CRS for channel measurement and signal demodulation, the resource determining module 310 determines that the corresponding CSS and UESS are in the Legacy PDCCH domain.

 Preferably, if the transmission mode of the corresponding PDSCH is based on CRS for channel measurement and demodulated based on the UE-RS port 5 or CRS, the resource determining module 310 determines that the corresponding CSS and UESS are in Legacy.

PDCCH domain.

 Preferably, if the transmission mode of the corresponding PDSCH is based on CRS for channel measurement, the resource determining module 310 determines that the corresponding CSS and UESS are in the Legacy PDCCH domain.

 As shown in FIG. 4, the method for allocating a PDCCH in the embodiment of the present invention includes the following steps:

 Step 401: The network side notifies the transmission mode of the physical downlink shared channel PDSCH corresponding to the user equipment. Step 402: The network side allocates a corresponding PDCCH resource to the user equipment according to the PDSCH transmission mode corresponding to the user equipment.

 The PDCCH resource includes a Legacy PDCCH domain and an Enhanced PDCCH domain.

 Preferably, in step 401, the network side notifies the transmission mode of the PDSCH corresponding to the user equipment 20 through high layer signaling.

 If the embodiment of the present invention is applied to the LTE-A system, the specific content of the transmission mode can be seen in Table 1.

 The network side allocates corresponding PDCCH resources to the user equipment according to the PDSCH transmission mode corresponding to the user equipment. Several types are listed below.

 Manner 1: If the transmission mode of the PDSCH corresponding to the user equipment is based on the CRS for channel measurement and signal demodulation, the network side allocates the CSS and the UESS corresponding to the user equipment to the Legacy PDCCH domain.

 For the LTE-A system, the transmission mode of the PDSCH based on CRS for channel measurement and signal demodulation is transmission mode 1~6, see Table 1.

 Manner 2: If the transmission mode of the PDSCH corresponding to the user equipment is based on the CRS for channel measurement and is demodulated based on the port 5 or CRS of the UE-RS, the network side allocates the CSS and the UESS corresponding to the user equipment to the legacy PDCCH. In the domain.

 For LTE-A systems, channel measurement based on CRS and demodulation based on UE-RS port 5 or CRS

The transmission mode of PDSCH is transmission mode 1~7, see Table 1. Manner 3: If the transmission mode of the PDSCH corresponding to the user equipment is based on the CRS for channel measurement, the network side allocates the CSS and the UESS corresponding to the user equipment to the legacy PDCCH domain.

 For the LTE-A system, the transmission mode of the PDSCH based on CRS for channel measurement is the transmission mode 1~8, see Table 1.

 Manner 4: If the transmission mode of the PDSCH corresponding to the user equipment is not based on the CRS for channel measurement and signal demodulation, the network side allocates the CSS corresponding to the user equipment to the legacy PDCCH domain, and allocates the UESS to the Enhanced PDCCH domain. in.

 Certainly, for the transmission mode that does not perform channel measurement and signal demodulation based on the CRS, other allocation methods may be used, for example, the CSS and the UESS corresponding to the user equipment are allocated to the Enhanced PDCCH domain; and the CSS corresponding to the user equipment is In the Enhanced PDCCH region, the UESS is in the legacy PDCCH domain.

 Manner 5: If the transmission mode of the PDSCH corresponding to the user equipment is not based on CRS for channel measurement and is not demodulated based on the port 5 or CRS of the UE-RS, the network side allocates the CSS corresponding to the user equipment 20 to the Legacy. In the PDCCH domain, the UESS is allocated to the Enhanced PDCCH domain.

 Certainly, for the transmission mode that does not perform channel measurement and signal demodulation based on the CRS, other allocation methods may be used, for example, the CSS and the UESS corresponding to the user equipment are allocated to the Enhanced PDCCH domain; and the CSS corresponding to the user equipment is In the Enhanced PDCCH region, the UESS is in the legacy PDCCH domain.

 Manner 6: If the transmission mode of the PDSCH corresponding to the user equipment is not based on the CRS, the network side allocates the CSS corresponding to the user equipment to the legacy PDCCH domain, and allocates the UESS to the Enhanced PDCCH domain.

 Certainly, for the transmission mode that does not perform channel measurement and signal demodulation based on the CRS, other allocation methods may be used, for example, the CSS and the UESS corresponding to the user equipment are allocated to the Enhanced PDCCH domain; and the CSS corresponding to the user equipment is In the Enhanced PDCCH region, the UESS is in the legacy PDCCH domain.

 In a specific implementation, the allocation may be performed in any of the above manners; and the foregoing may be performed in multiple ways without conflict.

 As shown in FIG. 5, the method for determining a PDCCH in the embodiment of the present invention includes the following steps:

 Step 501: The user equipment determines a transmission mode of the corresponding PDSCH that is notified by the network side.

 Step 502: The user equipment determines, according to the transmission mode of the corresponding PDSCH, the PDCCH resource, where the PDCCH resource includes a legacy PDCCH region and an enhanced PDCCH region.

 If the transmission mode of the corresponding PDSCH is based on CRS for channel measurement and signal demodulation, then in step 502, the user equipment determines that the corresponding CSS and UESS are in the Legacy PDCCH domain.

If the transmission mode of the corresponding PDSCH is based on CRS for channel measurement and is demodulated based on the UE-RS port 5 or CRS, in step 502, the user equipment determines that the corresponding CSS and UESS are in the Legacy PDCCH domain. If the transmission mode of the corresponding PDSCH is based on the CRS for channel measurement, in step 502, the user equipment determines that the corresponding CSS and UESS are in the legacy PDCCH domain.

 4 and FIG. 5, a process may be synthesized to form another method for determining a PDCCH, that is, step 401 and step 402 are performed first, and then step 501 and step 502 are performed; or step 401 and step 501 are performed first, and then step 402 is performed. And step 502.

 The following examples are given to further illustrate the solution of the present invention.

 Example 1: On the transmitting end, if the transmission mode of the user equipment is based on CRS for channel measurement and signal demodulation, the transmitting end allocates the CSS and UESS corresponding to the user equipment in the legacy PDCCH domain, otherwise the transmitting end will use the user equipment. The corresponding CSS is allocated in the Legacy PDCCH domain, the UESS is allocated in the Enhanced PDCCH domain, or the allocation of CSS and UESS of such users is implemented according to other rules. For example, in the LTE-A system, the transmission mode of the user equipment is one of modes 1 to 6 (mode 1 to 6 based on CRS measurement and demodulation, see Table 1), and the CSS and UESS corresponding to the user are allocated. Legacy PDCCH domain.

 Example 2: At the transmitting end, if the transmission mode of the user equipment is based on CRS for channel measurement, the transmitting end allocates the CSS and UESS corresponding to the user equipment in the legacy PDCCH domain, otherwise the transmitting end allocates the CSS corresponding to the user equipment. In the Legacy PDCCH domain, the UESS is allocated in the Enhanced PDCCH field, or the allocation of CSS and UESS of such users is implemented according to other rules. For example, in the LTE-A system, the transmission mode of the user equipment is one of modes 1 to 8 (mode 1 to 8 is based on CRS measurement, see Table 1), and the CSS and UESS corresponding to the user equipment are allocated in the legacy PDCCH. area.

 Embodiment 3: On the transmitting end, if the transmission mode of the user equipment is channel measurement based on CRS and demodulated based on UE-RS port 5 or CRS, the transmitting end allocates the CSS and UESS corresponding to the user equipment to Legacy. The PDCCH field, otherwise, the transmitting end allocates the CSS corresponding to the user equipment in the legacy PDCCH domain, the UESS allocates in the Enhanced PDCCH domain, or implements the allocation of CSS and UESS of such users according to other rules. For example, in the LTE-A system, the transmission mode of the user equipment is mode 1 to 7 (modes 1 to 7 are channel measurement based on CRS and demodulated based on UE-RS port 5 or CRS, see Table 1). For one type, the CSS and UESS corresponding to the user equipment are allocated in the Legacy PDCCH domain.

 It should be noted that the specific mode numbers above are all illustrated by taking Table 1 as an example. If there is any change in Table 1, the above specific mode number also needs to be modified accordingly.

 Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.

The present invention is directed to a flowchart of a method, apparatus (system), and computer program product according to an embodiment of the present invention. And / or block diagram to describe. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

 The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

 These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

 Although the preferred embodiment of the invention has been described, it will be apparent to those of ordinary skill in the art that <RTIgt; Therefore, the appended claims are intended to be construed as including the preferred embodiments and the modifications

 The PDCCH resources can be allocated under the PDCCH enhancement scheme, so that the effective transmission and reception of the PDCCH can be ensured;

 Further, reasonable allocation of PDCCH resources and avoiding unnecessary signaling overhead are avoided.

 It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

Rights request  A method for allocating a physical downlink control channel PDCCH, the method includes: the network side notifying a transmission mode of a physical downlink shared channel PDSCH corresponding to the user equipment; the network side according to the user equipment And corresponding to the transmission mode of the PDSCH, the corresponding PDCCH resource is allocated to the user equipment;  The PDCCH resource includes an original Legacy PDCCH region and an enhanced Enhanced PDCCH region. 2. The method according to claim 1, wherein the allocating corresponding PDCCH resources to the user equipment by the network side includes:  If the transmission mode of the PDSCH corresponding to the user equipment is based on the cell level reference signal CRS for channel measurement and signal demodulation, the network side device exclusively uses the common search space CSS corresponding to the user equipment and the user equipment. The search space UESS is allocated to the Legacy PDCCH domain.  The method according to claim 2, characterized in that, for the long-term evolution upgrade LTE-A system, the transmission mode of the PDSCH based on the CRS for channel measurement and signal demodulation is the transmission mode 1~6.  The method according to claim 1, wherein the allocating corresponding PDCCH resources to the user equipment by the network side includes:  If the transmission mode of the PDSCH corresponding to the user equipment is based on CRS for channel measurement and is demodulated based on the port 5 or CRS of the user-specific reference signal UE-RS, the network side device corresponds to the user equipment. The CSS and UESS are assigned to the Legacy PDCCH domain.  The method according to claim 4, wherein, for the LTE-A system, the transmission mode of the PDSCH based on the CRS for channel measurement and the UE-RS based port 5 or CRS is the transmission mode 1~7 .  The method according to claim 1, wherein the network side allocates corresponding PDCCH resources to the user equipment, including:  And if the transmission mode of the PDSCH corresponding to the user equipment is based on CRS, the network side device allocates the CSS and the UES S corresponding to the user equipment to the legacy PDCCH domain.  The method according to claim 6, wherein, for the LTE-A system, the transmission mode of the PDSCH based on the CRS for channel measurement is the transmission mode 1-8.  8. A method for determining a PDCCH, the method comprising:  Determining, by the user equipment, a transmission mode of the corresponding PDSCH notified by the network side;  Determining, by the user equipment, a PDCCH resource according to a transmission mode of the corresponding PDSCH;  The PDCCH resource includes a Legacy PDCCH domain and an Enhanced PDCCH domain. The method according to claim 8, wherein the determining, by the user equipment, the PDCCH resource comprises: if the transmission mode of the corresponding PDSCH is based on CRS for channel measurement and signal demodulation, the user equipment determines The corresponding CSS and UESS are in the Legacy PDCCH domain. 10. The method according to claim 9, wherein, for the LTE-A system, the transmission mode of the PDSCH based on the CRS for channel measurement and signal demodulation is the transmission mode 1~6.  The method according to claim 8, wherein the determining, by the user equipment, the PDCCH resource comprises: if the transmission mode of the corresponding PDSCH is based on CRS for channel measurement and based on UE-RS port 5 or If the CRS performs demodulation, the user equipment determines that the corresponding CSS and UESS are in the Legacy PDCCH domain.  The method according to claim 11, wherein, for the LTE-A system, the transmission mode of the PDSCH based on the CRS for channel measurement and the UE-RS based port 5 or CRS is the transmission mode 1~7 .  The method according to claim 8, wherein the determining, by the user equipment, the PDCCH resource comprises: if the transmission mode of the corresponding PDSCH is based on CRS, the user equipment determines the corresponding CSS And UESS in the Legacy PDCCH domain.  The method according to claim 13, wherein, for the LTE-A system, the transmission mode of the PDSCH based on the CRS for channel measurement is the transmission mode 1-8.  A network side device that allocates a PDCCH, the device includes:  a notification module, configured to notify a user of a PDSCH transmission mode corresponding to the device;  An allocating module, configured to allocate a corresponding PDCCH resource to the user equipment according to a transmission mode of a PDSCH corresponding to the user equipment;  The PDCCH resource includes a Legacy PDCCH domain and an Enhanced PDCCH domain.  The network side device according to claim 15, wherein the allocation module is specifically configured to: if the transmission mode of the PDSCH corresponding to the user equipment is based on CRS for channel measurement and signal demodulation, Assigning the CSS and UESS corresponding to the user equipment to the legacy PDCCH domain.  The network side device according to claim 15, wherein the allocation module is specifically configured to: if a transmission mode of a PDSCH corresponding to the user equipment is a channel measurement based on a CRS and a UE-RS based port 5: If the CRS performs demodulation, the CSS and UESS corresponding to the user equipment are allocated to the legacy PDCCH domain.  The network side device according to claim 15, wherein the allocation module is specifically configured to: if the transmission mode of the PDSCH corresponding to the user equipment is based on CRS, the user is The CSS and UESS corresponding to the device are allocated to the Legacy PDCCH domain.  19. A user equipment for determining a PDCCH, the user equipment comprising:  a transmission mode determining module, configured to determine a transmission mode of the corresponding PDSCH that is notified by the network side, and a resource determining module, configured to determine a PDCCH resource according to a transmission mode of the corresponding PDSCH, where the PDCCH resource includes a legacy PDCCH region and Enhanced PDCCH domain. The user equipment according to claim 19, wherein the resource determining module is specifically configured to: if the transmission mode of the corresponding PDSCH is based on CRS for channel measurement and signal demodulation, determine the correct The CSS and UESS should be in the Legacy PDCCH domain.  The user equipment according to claim 19, wherein the resource determining module is specifically configured to: if the corresponding PDSCH transmission mode is based on CRS for channel measurement and based on UE-RS port 5 or The CRS is demodulated, and the CSS and UESS corresponding to the determination are in the Legacy PDCCH domain.  The user equipment according to claim 19, wherein the resource determining module is specifically configured to: if the corresponding PDSCH transmission mode is based on CRS for channel measurement, the determining corresponds to CSS and UESS are in the Legacy PDCCH domain.  23. A system for determining a PDCCH, the system comprising:  a network side device, configured to notify a transmission mode of the PDSCH corresponding to the user equipment, and allocate a corresponding PDCCH resource to the user equipment according to a transmission mode of the PDSCH corresponding to the user equipment;  a user equipment, configured to determine a transmission mode of the corresponding PDSCH that is notified by the network side, and determine a PDCCH resource according to the corresponding transmission mode of the PDSCH;  The PDCCH resource includes a Legacy PDCCH domain and an Enhanced PDCCH domain.