CN103037511B - A kind of indicating means, system and equipment strengthening down control channel resources - Google Patents
A kind of indicating means, system and equipment strengthening down control channel resources Download PDFInfo
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Abstract
The invention provides a kind of indicating means, system and the equipment that strengthen down control channel resources.Indicating means wherein comprises: network side is that multiple UE configures corresponding E-PDCCH resource, and arranges N-DCI; The positional information of E-PDCCH resource and the indication information of N-DCI are sent to each UE by high-level signaling by network side, and the E-PDCCH indication information of each UE are carried in N-DCI and send to each UE; The N-DCI that UE is corresponding with this UE according to the indication information search of N-DCI, and E-PDCCH indication information is known from the N-DCI searched; UE, according to the positional information of the E-PDCCH resource of carrying in E-PDCCH indication information and high-level signaling, searches configuration to the E-PDCCH resource of UE.Application the present invention can realize the dynamic-configuration of E-PDCCH resource, and saves PDCCH resource.
Description
Technical field
The present invention relates to mobile communication technology field, particularly relate to a kind of indicating means, system and the equipment that strengthen down control channel resources.
Background technology
The configuration defined in 3GPPLTE specification version 8,9 and 10 is Physical Downlink Control Channel (PDCCH) to the control channel of UE, described PDCCH generally takies front 1 ~ 3 symbol of each subframe, and concrete symbol numbers is by the instruction of Physical Control Format Indicator Channel (PCFICH) channel or high-level signaling notice UE.And in 3GPPLTE specification version 11, also a kind of configuration will be proposed to the PDCCH of the enhancing of UE, be called E-PDCCH.
Along with the increase of number of mobile users and the change (as heterogeneous network structure) of network deployment structure, the capacity of current PDCCH can not meet the dispatching requirement of user data transmission, therefore, there is the following problem needing to solve in PDCCH of the prior art:
1) PDCCH capacity needs to promote
In follow-up Long Term Evolution (LTE) version, multi-user's multiple-input and multiple-output (MIMO) transmission will be enhanced, and multi-user MIMO transmissions needs more PDCCH resource relative to Single User MIMO.In addition, in the scene 4 of cooperative multipoint transmission technology (CoMP), multiple transfer point shares same cell identification number, therefore the finite capacity of PDCCH, and single community that the number of users of service need be provided relatively traditional will be more, therefore there is higher capacity requirement to PDCCH.
2) PDCCH AF panel
Current LTE adopts interference coordination (eICIC) mechanism between enhancement type district to carry out PDCCH interference coordination, but the resource utilization of above-mentioned mechanism is low, therefore the interference coordination mechanism considering new high resource utilization is needed, effectively to suppress the interference of PDCCH.
3) PDCCH coverage needs to strengthen
The enhancing of coverage needs to promote user and receives PDCCH performance, promotes user's receptivity and then can consider to use based on technology such as the MIMO technology of precoding, link adaptation techniques and power enhancings.But due to the impact of PDCCH self reason, current PDCCH transmission also cannot use above-mentioned technology, and therefore the coverage of PDCCH also needs to strengthen.
Based on above-mentioned reason, in current 3GPPLTE-AR11 agreement, need the transmission problem considering E-PDCCH.In the prior art, the design overall thinking of the indicating means of E-PDCCH resource is placed on by E-PDCCH in resource that former PDSCH takies, promotes PDCCH capacity with this.The indicating means of the E-PDCCH resource often used at present generally has two kinds:
First method: quasistatic collocation method.
In the method, all configuration informations of the E-PDCCH corresponding to each UE in a set of terminal are all sent to each UE in this set of terminal by network side by high-level signaling, according to described high-level signaling, each UE then can know that network side configures to the configuration information of the E-PDCCH of self.Described configuration information comprises: the information such as the positional information (namely this E-PDCCH is arranged on the position of which PDSCH) of the PDSCH shared by E-PDCCH.Therefore, each UE all can find network side to distribute to the E-PDCCH of each UE according to the configuration information of above-mentioned E-PDCCH.
Due in the above-mentioned methods, the configuration information of above-mentioned E-PDCCH is all directly send to each UE by high-level signaling, and the transmission cycle of high-level signaling is longer, therefore the configuration information of E-PDCCH that obtains of UE is relatively fixing, so above-mentioned method belongs to a kind of quasistatic collocation method.But, dynamic configuration information generally all needs dynamically to transmit in time, therefore dynamic configuration information cannot be transmitted by above-mentioned high-level signaling, thus be difficult to realize the dynamic-configuration such as dynamic E-PDCCH Resourse Distribute, Adaptive Modulation and Coding (AMC), effectively cannot improve the efficiency of E-PDCCH; Meanwhile, because the E-PDCCH of multiple user needs to utilize space division multiplexing mode to transmit on same running time-frequency resource, therefore above-mentioned quasistatic collocation method also cannot realize multi-user PDCCH and transmits.But for E-PDCCH, link circuit self-adapting (i.e. Adaptive Modulation and Coding) and multi-user PDCCH transmit the required two kinds of key properties supported of E-PDCCH exactly.
Second method: Dynamic Configuration.
In the method, first network side sends a Downlink Control Information (DCI) by PDCCH to each UE in a set of terminal, and this DCI comprises: configure to information such as the positional information of the PDSCH shared by the E-PDCCH of UE, modulation coding information and demodulated reference signal (DMRS) port numbers.Each UE can know the configuration information of the E-PDCCH resource that network side configures according to received DCI.
In the method, although DCI can be sent by PDCCH to each UE, thus realize the dynamic-configuration such as dynamic E-PDCCH Resourse Distribute, AMC, but because configuration all needs to use more bit to indicate to information such as the positional information of the PDSCH shared by the E-PDCCH of UE and the precoding informations relevant to business data transmission, therefore the relevant information of a UE can generally only be carried in a DCI, and the relevant information of multiple UE can not be carried, thus make transmission DCI is needed for each UE, thus need to take a large amount of PDCCH resource.
In summary, owing to also there is above-mentioned problem in E-PDCCH transmission method of the prior art, be therefore difficult to the dynamic-configuration effectively realizing E-PDCCH resource under the prerequisite of saving PDCCH resource, the needs of practical application can not be met.
Summary of the invention
In view of this, the invention provides a kind of indicating means, system and the equipment that strengthen down control channel resources, thus the dynamic-configuration of E-PDCCH resource can be realized, and save PDCCH resource.
The technical solution used in the present invention is specifically achieved in that
Strengthen an indicating means for down control channel resources, the method comprises:
Network side is that user terminal UE configures E-PDCCH resource, and arranges new Downlink Control Information N-DCI;
Configuration is sent to described UE to the indication information of the positional information of the E-PDCCH resource of described UE and described N-DCI by high-level signaling by network side, and the E-PDCCH indication information of described UE is carried in described N-DCI and sends to described UE.
The invention allows for a kind of indicating means strengthening down control channel resources, the method comprises:
User terminal UE obtains the indication information configured to the positional information of the E-PDCCH resource of described UE and new Downlink Control Information N-DCI from received high-level signaling;
The N-DCI that described UE is corresponding with this UE according to the indication information search of described N-DCI, and the E-PDCCH indication information corresponding with this UE is known from the N-DCI searched;
Described UE, according to the positional information of described E-PDCCH indication information and described E-PDCCH resource, searches configuration to the E-PDCCH resource of described UE.
The invention allows for a kind of indication mechanism strengthening down control channel resources, this indication mechanism comprises: network side entity needs with at least one the user terminal UE configuring E-PDCCH resource;
Described network side entity, for configuring E-PDCCH resource for described UE, and arranges new Downlink Control Information N-DCI; Configuration is sent to described UE to the indication information of the positional information of the E-PDCCH resource of described UE and described N-DCI by high-level signaling, and the E-PDCCH indication information of described UE is carried in described N-DCI sends to described UE;
The described UE needing configuration E-PDCCH resource, for obtaining the indication information configured to the positional information of the E-PDCCH resource of described UE and new Downlink Control Information N-DCI from received high-level signaling; The N-DCI corresponding with described UE according to the indication information search of described N-DCI, and the E-PDCCH indication information corresponding with described UE is known from the N-DCI searched; And according to the positional information of described E-PDCCH indication information and described E-PDCCH resource, search configuration to the E-PDCCH resource of described UE.
The invention allows for a kind of indicating equipment strengthening down control channel resources, this indicating equipment comprises: configuration module, arrange module and sending module;
Described configuration module, for configuring E-PDCCH resource for user terminal UE, sends to described sending module by configuration to the positional information of the E-PDCCH resource of described UE; The E-PDCCH indication information of described UE is sent to described module is set;
Described module being set, for arranging new Downlink Control Information N-DCI, and the E-PDCCH indication information of described UE being carried in described N-DCI; The indication information of described N-DCI and described N-DCI is sent to described sending module;
Described sending module, for configuration is sent to described UE to the indication information of the positional information of the E-PDCCH resource of described UE and described N-DCI by high-level signaling, and sends to described UE by described N-DCI.
The invention allows for a kind of user terminal, this user terminal comprises: receiver module, search module and source obtaining module;
Described receiver module, for obtaining the indication information configured to the positional information of the E-PDCCH resource of described UE and described new Downlink Control Information N-DCI from received high-level signaling; The positional information of described E-PDCCH resource is sent to described source obtaining module, the indication information of described new Downlink Control Information N-DCI is sent to described search module;
Described search module, for the N-DCI that the indication information search according to described N-DCI is corresponding with this UE, and knows the E-PDCCH indication information corresponding with this UE from the N-DCI searched; Described E-PDCCH indication information is sent to described source obtaining module;
Described source obtaining module, for the positional information according to described E-PDCCH indication information and described E-PDCCH resource, searches configuration to the E-PDCCH resource of described UE.
As seen from the above technical solution, in the present invention, because network side will arrange the N-DCI being used for the E-PDCCH indication information of carrying multiple UE, then configuration is sent to each UE to the positional information of E-PDCCH resource of UE and the indication information of N-DCI by high-level signaling, and the E-PDCCH indication information of each UE is carried in described N-DCI sends to each UE, thus the dynamic-configuration of E-PDCCH resource can be realized, and save PDCCH resource.
Accompanying drawing explanation
Fig. 1 is the flow chart of the indicating means of the enhancing down control channel resources of network side in the present invention.
Fig. 2 is the flow chart of the indicating means of the enhancing down control channel resources of UE side in the present invention.
Fig. 3 is the schematic flow sheet of embodiment one in the present invention.
Fig. 4 is the structural representation of the N-DCI in the embodiment of the present invention one.
Fig. 5 is the structural representation of the N-DCI in the embodiment of the present invention two.
Fig. 6 is the composition schematic diagram of the indication mechanism of enhancing down control channel resources in the present invention.
Fig. 7 is the structural representation of the indicating equipment of enhancing down control channel resources in the present invention.
Fig. 8 is the structural representation of the user terminal in the present invention.
Embodiment
Express clearly clear for making the object, technical solutions and advantages of the present invention, below in conjunction with drawings and the specific embodiments, the present invention is further described in more detail.
Fig. 1 is the flow chart of the indicating means of the enhancing down control channel resources of network side in the present invention.As shown in Figure 1, the method comprises step as described below:
Step 101, network side is that UE configures E-PDCCH resource, and arranges new Downlink Control Information (N-DCI).
In this step, first network side (such as, eNB) will be that one or more UE configuring E-PDCCH resource that needs configures corresponding E-PDCCH resource in available PDSCH resource.If be the UE configuration E-PDCCH resource of a set of terminal, then network side all configures corresponding E-PDCCH resource by for each UE in this set of terminal.Such as, when have in one group of set of terminal N (N be greater than 1 integer) individual UE time, network side selects N number of PDSCH resource by available PDSCH resource, then an E-PDCCH resource is set on the position of selected each PDSCH resource, makes the unique corresponding E-PDCCH resource set by of each UE in above-mentioned N number of UE.
In addition, in this step, network side also will arrange the N-DCI of one or more E-PDCCH indication information for carrying multiple UE.Wherein, can comprise in described E-PDCCH indication information: described configuration is to other any one or more information in the configuration information of the E-PDCCH resource of UE except the positional information of described E-PDCCH resource, such as, in a particular embodiment of the present invention, can comprise in described E-PDCCH indication information: any one or more information in blind check indication information, decode-regulating information and DMRS port information.
Wherein, whether described blind check indication information can be used for indicating the blinded fashion that uses of UE or being used to indicate network side is that UE is assigned with E-PDCCH resource; Described decode-regulating information is used to indicate the modulation coding mode of described E-PDCCH; Described DMRS port information is used to indicate the spendable DMRS port number of UE; The UE transmitted for only supporting single user, can not inform the DMRS port information that this UE uses, and now, this UE will use the DMRS port of acquiescence.
In the inventive solutions, network side can use multiple method to set up to arrange described N-DCI.Preferably, in a particular embodiment of the present invention, existing DCI format 0 can be utilized to arrange described N-DCI.Such as, the N-DCI that described network side is arranged for the E-PDCCH indication information of carrying multiple UE comprises:
Network side is arranged has the N-DCI of same number of bits with DCI format 0, and arranges the information field of one or more E-PDCCH indication information for carrying UE at described N-DCI according to the size of the E-PDCCH indication information of required transmission.
For example, if DCI format 0 has N
0individual bit, the size of described E-PDCCH indication information is N
1individual bit, then can arrange M=|N at most in a described N-DCI
0/ N
1| individual information field.Wherein, " || " represents the operation rounded downwards.When M is not integer, then unnecessary bit can be set to filling bit.Such as, when total bit number of DCI format 0 is 26 bits, if the size of each information field is 3 bits, then in a N-DCI, 8 information fields can be set at most, and be provided with 2 filling bits, thus make the bit number of N-DCI identical with DCI format 0 bit number.
Due to M information field can be arranged at most in above-mentioned N-DCI, and the E-PDCCH indication information of a UE in each information field, can be carried, therefore, the E-PDCCH indication information of M UE in a N-DCI, can be carried at most.
Further, due to the E-PDCCH indication information of M UE can be carried at most in a N-DCI, therefore, after described N-DCI is set, network side also can arrange the information field mapping relations of described N-DCI, and described information field mapping relations are used to indicate the relation mapped one by one between each information field in each UE and described N-DCI.
In addition, in practical situations, when the number of UE is more, then may need to use multiple N-DCI, now need each N-DCI to distribute to each UE.Such as, suppose, in a N-DCI, there are 8 information fields, the E-PDCCH indication information of 8 UE can be carried, when the number of UE is 20, then at least need use 3 N-DCI to carry the E-PDCCH indication information of 20 UE.Such as, the 1st N-DCI can be distributed to 1st ~ 8 UE by network side, and the 2nd N-DCI is distributed to 9th ~ 16 UE, and the 3rd N-DCI is distributed to 17th ~ 20 UE.In addition, due to network side by by public search space to the N-DCI described in all UE broadcast, therefore when needs use multiple N-DCI, also need to distinguish different N-DCI.
Therefore, further, in a particular embodiment of the present invention, when needing to use multiple N-DCI to send the E-PDCCH indication information of UE, multiple N-DCI is distributed to each UE by network side respectively, and distributes a radio network temporary identifier N-RNTI (can referred to as temporary identifier) for each N-DCI.
Step 102, configuration is sent to described UE to the indication information of the positional information of the E-PDCCH resource of UE and described N-DCI by high-level signaling by network side, and the E-PDCCH indication information of described UE is carried in described N-DCI and sends to described UE.
In this step, the positional information (positional information of the PDSCH resource namely shared by this E-PDCCH resource) of the E-PDCCH resource configured for UE and the indication information of described N-DCI are sent to each corresponding UE by by high-level signaling by network side, UE can be known according to received high-level signaling, and configuration is to the positional information of the E-PDCCH resource of this UE, and can know N-DCI corresponding to this UE according to the indication information of received N-DCI.
Wherein, the indication information of described N-DCI is used to indicate the Detection Information of the N-DCI corresponding to UE.Preferably, in a particular embodiment of the present invention, the indication information of described N-DCI can comprise: the temporary identifier of the N-DCI corresponding to each UE and the information field mapping relations of each N-DCI.
In addition, in this step, the N-DCI carrying the E-PDCCH indication information of each UE also can be sent to each UE by the mode of broadcast by network side, makes UE can know E-PDCCH indication information corresponding to this UE by the N-DCI corresponding to it.
According to foregoing, in this step, the positional information of the E-PDCCH resource configured for UE sends to each UE by high-level signaling, and is not send to each UE by DCI.Therefore, in N-DCI in the present invention, without the need to carrying the positional information taking the many E-PDCCH resources of bit number, and only need the E-PDCCH indication information of carrying each UE.Due to each UE E-PDCCH indication information shared by bit less, without the need to taking too much PDCCH resource, therefore the E-PDCCH indication information of multiple UE can be carried at a N-DCI, thus while the dynamic-configuration realizing E-PDCCH resource, effectively PDCCH resource can be saved.
Be more than be introduced from the indicating means of network side to enhancing down control channel resources of the present invention, be introduced from UE side to the indicating means of the enhancing down control channel resources in the present invention below.
Fig. 2 is the flow chart of the indicating means of the enhancing down control channel resources of UE in the present invention.As shown in Figure 2, the method comprises step as described below:
Step 201, UE obtains the indication information configured to the positional information of the E-PDCCH resource of described UE and new Downlink Control Information N-DCI from received high-level signaling.
In this step, UE will receive the high-level signaling that network side sends, thus can obtain network side configure to the positional information of E-PDCCH resource of described UE and the indication information of N-DCI from received high-level signaling.
Step 202, the N-DCI that UE is corresponding with this UE according to the indication information search of described N-DCI, and the E-PDCCH indication information corresponding with this UE is known from the N-DCI searched.
In this step, UE can search the N-DCI corresponding with this UE according to the indication information of the N-DCI carried in received high-level signaling, and then from the described N-DCI searched, knows the E-PDCCH indication information corresponding with this UE according to the indication information of the N-DCI carried in received high-level signaling.
Such as, in a particular embodiment of the present invention, when the indication information of described N-DCI comprises the information field mapping relations of the temporary identifier of the N-DCI corresponding to each UE and each N-DCI, then described step 202 can be specially:
Each UE, according to the temporary identifier of the N-DCI corresponding with self obtained from received high-level signaling, searches for the N-DCI corresponding with described UE in public search space;
When searching the N-DCI corresponding with described UE, the information field mapping relations according to the described N-DCI obtained from received high-level signaling read the E-PDCCH indication information corresponding with described UE in the N-DCI searched.
Wherein, the definition of above-mentioned public search space is consistent with the definition in existing specification, does not repeat them here.
Owing to all carrying corresponding temporary identifier in each N-DCI in public search space, and UE can know the temporary identifier of the N-DCI corresponding with this UE from received high-level signaling, therefore, UE the temporary identifier of N-DCI corresponding to self can judge which N-DCI in public search space is the N-DCI corresponding with this UE.
So further, in a particular embodiment of the present invention, above-mentioned UE searches for the N-DCI corresponding with described UE and can be specially in public search space:
The temporary identifier of the N-DCI of UE corresponding to self detects each N-DCI in public search space, and knows the N-DCI corresponding with described UE according to testing result.Such as, when described testing result is for coupling, then represent that detected N-DCI is the N-DCI corresponding with described UE.
Step 203, described UE, according to the positional information of described E-PDCCH indication information and described E-PDCCH resource, searches configuration to the E-PDCCH resource of this UE.
In a particular embodiment of the present invention, because UE is after receiving high-level signaling, from received high-level signaling, directly can know that network side configures to the positional information of the E-PDCCH resource of this UE, therefore, in this step, described UE can according to the positional information of the E-PDCCH resource of carrying in described E-PDCCH indication information and described high-level signaling, carry out PDCCH blind Detecting in the frequency domain position of the E-PDCCH resource configured at network side, thus search configuration to the E-PDCCH resource of this UE.Search configuration to the E-PDCCH resource of this UE after, this UE then can use configured E-PDCCH resource to carry out detection or other corresponding subsequent operation of corresponding business datum.Concrete operating process does not repeat them here.
From the indicating means of the enhancing down control channel resources shown in Fig. 1, Fig. 2, in a particular embodiment of the present invention, network side is used for the N-DCI of the E-PDCCH indication information of carrying multiple UE by arranging, then configuration is sent to each UE to the positional information of E-PDCCH resource of UE and the indication information of N-DCI by high-level signaling, and the E-PDCCH indication information of each UE is carried in described N-DCI sends to each UE.Because configuration is send to UE by high-level signaling to the positional information of the E-PDCCH resource of UE, instead of use DCI to send to UE, therefore the E-PDCCH indication information of carrying each UE is only needed in N-DCI, thus without the need to taking too much PDCCH resource, but also the E-PDCCH indication information of multiple UE can be carried at a N-DCI, thus while the efficiency of dynamic-configuration improving E-PDCCH resource, also effectively can save PDCCH resource.
By in the mode of specific embodiment, technical scheme of the present invention is described in detail below.
Embodiment one:
Fig. 3 is the schematic flow sheet of embodiment one in the present invention.As shown in Figure 3, in the present invention, embodiment one comprises step as described below:
Step 301, network side is that multiple UE configures corresponding E-PDCCH resource, and arranges the N-DCI of the E-PDCCH indication information for carrying multiple UE.
The implementation of this step is identical with the implementation of above-mentioned steps 101 or similar, does not repeat them here.
In addition, in the present embodiment, existing DCI format 0 will be utilized to arrange described N-DCI, and the information field of multiple E-PDCCH indication information for carrying UE will be set at described N-DCI.Wherein, described E-PDCCH indication information comprises: blind check indication information, decode-regulating information and DMRS port information.
Fig. 4 is the structural representation of the N-DCI in the embodiment of the present invention one.As shown in Figure 4, the blind check indication information of the N-DCI in the embodiment of the present invention one, decode-regulating information and DMRS port information all take 1 bit, therefore, the size of described E-PDCCH indication information is 3 bits, M information field can be set in a N-DCI, the E-PDCCH indication information of a UE in each information field, can be carried; In addition, m filling bit can be also provided with at the last of described N-DCI.Therefore, when total bit number of DCI format 0 is 26 bits, then can arrange 8 information fields in a N-DCI, 2 remaining bits can be used as filling bit.In addition, network side (such as, eNB) also check code can be calculated according to the bit information of 26 in N-DCI, and the N-RNTI of described check code and 16 bit long is carried out mould 2 add computing, form the new data of 16 bit long, then carry out coded modulation according to existing specification and be mapped to PDCCH region, so that the UE new data of N-RNTI to above-mentioned 16 bit long of self detects, thus judging whether this N-DCI is the N-DCI sending to this UE.
Wherein, the value implication of above-mentioned blind check indication information, decode-regulating information and DMRS port information all can pre-set.
Such as, when the value of blind check indication information is " 0 ", represent that network side is that UE is assigned with E-PDCCH resource; And when the value of blind check indication information is " 1 ", then represent network side not for UE distributes E-PDCCH resource.
Such as, when the value of decode-regulating information is " 0 ", represents and use QPSK modulation system; And when the value of decode-regulating information is " 1 ", then represents and use 16QAM modulation system.
Such as, if E-PDCCH resource distribution is multi-user transmission, then when the value of DMRS port information is " 0 ", represent and adopt DMRS port 7; And when the value of DMRS port information is " 1 ", then represents and adopt DMRS port 7.And if E-PDCCH resource distribution is single user transmission, and be single double-current Adaptive Transmission, then when the value of DMRS port information is " 0 ", represent single-stream transmission, adopt DMRS port 7; And when the value of DMRS port information is " 1 ", then represent stream transmission, adopt DMRS port 7 and 8.
In addition, if E-PDCCH resource distribution is single user transmission, and be single-stream transmission, then the value of this DMRS port information is without concrete meaning; Or, in described E-PDCCH indication information, DMRS port information will not be comprised.
Due to the E-PDCCH indication information of 8 UE can be carried in the N-DCI of in the present embodiment, therefore in the present embodiment, after the N-DCI described in arranging with multiple information field, network side also will arrange the information field mapping relations of described N-DCI, namely arrange the relation mapped one by one between 8 information fields in 8 UE and described N-DCI.Such as, the information field mapping relations of described N-DCI are set to: the 1st information field in described N-DCI corresponds to the 1st UE, the 2nd information field in described N-DCI corresponds to the 2nd UE ..., the 8th information field in described N-DCI corresponds to the 8th UE.
In addition, when the number of UE is more, then may need to use multiple N-DCI.Such as, when the number of UE is 20, then the above-mentioned N-DCI of use 3 is at least needed to carry the E-PDCCH indication information of 20 UE.Now, multiple N-DCI can be distributed to each UE by network side respectively, such as, 3 above-mentioned N-DCI is distributed to 20 UE respectively, and then distributes a radio network temporary identifier N-RNTI for each N-DCI.
Step 302, configuration is sent to each UE to the temporary identifier of N-DCI corresponding to the positional information of the E-PDCCH resource of UE, each UE and the information field mapping relations of each N-DCI by high-level signaling by network side.
Step 303, the E-PDCCH indication information of each UE is carried in described N-DCI and sends to each UE by network side.
Step 302 is identical with the implementation of above-mentioned steps 102 or similar with the implementation of 303, does not repeat them here.
Step 304, the temporary identifier of N-DCI of described UE corresponding to each UE carried in described high-level signaling and the information field mapping relations of each N-DCI, search for the N-DCI corresponding with this UE, and know the E-PDCCH indication information corresponding with this UE from the N-DCI searched.
The implementation of this step is identical or similar with the implementation of 202 with above-mentioned steps 201.
Such as, in this step, each UE will know the temporary identifier of the N-DCI corresponding to self according to high-level signaling, then the temporary identifier of the N-DCI of each UE corresponding to self detects each N-DCI in public search space, when described testing result is for coupling, then represent that detected N-DCI is the N-DCI corresponding with described UE.
After searching the N-DCI corresponding with described UE, UE then can read the E-PDCCH indication information corresponding with described UE according to the information field mapping relations of the described N-DCI obtained from high-level signaling in the N-DCI searched.
Step 305, described UE, according to the positional information of the E-PDCCH resource of carrying in described E-PDCCH indication information and described high-level signaling, searches configuration to the E-PDCCH resource of this UE.
The implementation of this step is identical with the implementation of above-mentioned steps 203 or similar.
Such as, in this step, according to the value of the blind check indication information in described E-PDCCH indication information, first described UE can know whether network side is that this UE is assigned with E-PDCCH resource.When network side is not for this UE distributes E-PDCCH resource, then terminate whole flow process; And when network side is assigned with E-PDCCH resource for this UE, then UE can according to the value of the decode-regulating information in described E-PDCCH indication information and DMRS port information, know concrete modulation system (such as, QPSK modulation system or 16QAM modulation system) and the DMRS port number that adopts, and then use above-mentioned modulation system and DMRS port number, carry out PDCCH blind Detecting in the frequency domain position of the E-PDCCH resource configured at network side, thus search configuration to the E-PDCCH resource of this UE.Search configuration to the E-PDCCH resource of this UE after, this UE can use configured E-PDCCH resource to carry out detection or other corresponding subsequent operation of corresponding business datum.If UE does not search configuration to the E-PDCCH resource of this UE, then can terminate whole flow process.
According to above-mentioned description, above-described embodiment one is applicable to the UE supporting multi-user transmission, is also applicable to the UE supporting single user transmission.
Embodiment two:
Compared with the above embodiments one, the difference of the present embodiment is that the content of E-PDCCH indication information entrained in set N-DCI is different, and other step is then identical or similar.
Such as, in the present embodiment, existing DCI format 0 will be utilized to arrange described N-DCI, and the information field of multiple E-PDCCH indication information for carrying UE is set at described N-DCI.Wherein, described E-PDCCH indication information comprises: blind check indication information and decode-regulating information.
Fig. 5 is the structural representation of the N-DCI in the embodiment of the present invention two.As shown in Figure 5, the blind check indication information of the N-DCI in the embodiment of the present invention two takies 2 bits, and decode-regulating information then takies 1 bit.Therefore, the size of described E-PDCCH indication information is 3 bits, can arrange M information field, can carry the E-PDCCH indication information of a UE in each information field in a N-DCI; In addition, m filling bit can be also provided with at the last of described N-DCI.Therefore, when total bit number of DCI format 0 is 26 bits, then can arrange 8 information fields in a N-DCI, 2 remaining bits can be used as filling bit.In addition, network side (such as, eNB) also check code can be calculated according to the bit information of 26 in N-DCI, and the N-RNTI of described check code and 16 bit long is carried out mould 2 add computing, form the new data of 16 bit long, then carry out coded modulation according to existing specification and be mapped to PDCCH region.
Wherein, the value implication of above-mentioned blind check indication information and decode-regulating information all can pre-set.
Such as, when the value of decode-regulating information is " 0 ", represents and use QPSK modulation system; And when the value of decode-regulating information is " 1 ", then represents and use 16QAM modulation system.
Such as, when the value of blind check indication information is " 00 ", represent network side not for UE distributes E-PDCCH resource; When the value of blind check indication information is " 01 ", then represent that E-PDCCH blind check control channel unit (CCE) polymerization level is 1; When the value of blind check indication information is " 10 ", then represent that E-PDCCH blind check control channel unit (CCE) polymerization level is 2; When the value of blind check indication information is " 11 ", then represent that E-PDCCH blind check control channel unit (CCE) polymerization level is 4 or 8.
Wherein, because different E-PDCCH blind check control channels unit (CCE) is polymerized the blinded fashion that level represents different, therefore UE can know to adopt which kind of blinded fashion according to the value of above-mentioned blind check indication information.
In the present embodiment, owing to not comprising DMRS port information in described E-PDCCH indication information, therefore the present embodiment is only applicable to the UE supporting single user transmission.
In the inventive solutions, also proposed a kind of indication mechanism strengthening down control channel resources.Fig. 6 is the composition schematic diagram of the indication mechanism of enhancing down control channel resources in the present invention.As shown in Figure 6, the indication mechanism of described enhancing down control channel resources comprises: network side entity 601 needs with at least one the UE602 configuring E-PDCCH resource.
Described network side entity 601, for configuring E-PDCCH resource for described UE602, and arranges new Downlink Control Information N-DCI; Configuration is sent to described UE602 to the indication information of the positional information of the E-PDCCH resource of described UE602 and described N-DCI by high-level signaling, and the E-PDCCH indication information of described UE602 is carried in described N-DCI sends to described UE602;
The described UE602 needing configuration E-PDCCH resource, for obtaining the indication information configured to the positional information of the E-PDCCH resource of described UE and new Downlink Control Information N-DCI from received high-level signaling; The N-DCI corresponding with described UE602 according to the indication information search of described N-DCI, and the E-PDCCH indication information corresponding with described UE602 is known from the N-DCI searched; And according to the positional information of described E-PDCCH indication information and described E-PDCCH resource, search configuration to the E-PDCCH resource of described UE602.
In the inventive solutions, a kind of indicating equipment strengthening down control channel resources is also proposed.Fig. 7 is the structural representation of the indicating equipment of enhancing down control channel resources in the present invention.As shown in Figure 7, the indicating equipment of described enhancing down control channel resources comprises: configuration module 701, arrange module 702 and sending module 703.
Described configuration module 701, for being that UE configures E-PDCCH resource, and sending to the E-PDCCH indication information of described UE and arranges module 702; Configuration is sent to sending module 703 to the positional information of the E-PDCCH resource of described UE;
Described module 702 being set, for arranging new Downlink Control Information N-DCI, and the E-PDCCH indication information of described UE being carried in described N-DCI; The indication information of described N-DCI and described N-DCI is sent to sending module 703;
Described sending module 703, for configuration is sent to described UE to the indication information of the positional information of the E-PDCCH resource of described UE and described N-DCI by high-level signaling, and sends to described UE by described N-DCI.
In the inventive solutions, also proposed a kind of user terminal.Fig. 8 is the structural representation of the user terminal in the present invention.As shown in Figure 8, described user terminal comprises: receiver module 801, search module 802 and source obtaining module 803;
Described receiver module 801, for obtaining the indication information configured to the positional information of the E-PDCCH resource of described UE and described new Downlink Control Information N-DCI from received high-level signaling; The positional information of described E-PDCCH resource is sent to described source obtaining module 803, the indication information of described new Downlink Control Information N-DCI is sent to described search module 802;
Described search module 802, for the N-DCI that the indication information search according to described N-DCI is corresponding with this UE, and knows the E-PDCCH indication information corresponding with this UE from the N-DCI searched; Described E-PDCCH indication information is sent to described source obtaining module 803;
Described source obtaining module 803, for the positional information according to described E-PDCCH indication information and described E-PDCCH resource, searches configuration to the E-PDCCH resource of described UE.
In sum, in the inventive solutions, because network side will arrange the N-DCI being used for the E-PDCCH indication information of carrying UE, then configuration is sent to each UE to the positional information of E-PDCCH resource of UE and the indication information of N-DCI by high-level signaling, and the E-PDCCH indication information of each UE is carried in described N-DCI sends to each UE.Because configuration is send to UE by high-level signaling to the positional information of the E-PDCCH resource of UE, instead of use DCI to send to UE, therefore the E-PDCCH indication information of carrying each UE is only needed in N-DCI, thus without the need to taking too much PDCCH resource, but also the E-PDCCH indication information of multiple UE can be carried at a N-DCI, thus while the efficiency of dynamic-configuration improving E-PDCCH resource, also effectively can save PDCCH resource.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (12)
1. strengthen an indicating means for down control channel resources, it is characterized in that, the method comprises:
Network side is that user terminal UE configures E-PDCCH resource, and arranges new Downlink Control Information N-DCI;
Configuration is sent to described UE to the indication information of the positional information of the E-PDCCH resource of described UE and described N-DCI by high-level signaling by network side, and the E-PDCCH indication information of described UE is carried in described N-DCI and sends to described UE;
Wherein, described network side arranges N-DCI and comprises:
Network side is arranged has the N-DCI of same number of bits with Downlink Control Information DCI format 0, and arranges the information field of one or more E-PDCCH indication information for carrying UE at described N-DCI according to the size of the E-PDCCH indication information of required transmission;
After arranging described N-DCI, network side arranges the information field mapping relations of described N-DCI;
Described information field mapping relations are used to indicate the relation mapped one by one between each information field in each UE and described N-DCI.
2. method according to claim 1, is characterized in that, described E-PDCCH indication information comprises:
Any one or more information in blind check indication information, decode-regulating information and demodulated reference signal DMRS port information.
3. method according to claim 1, is characterized in that:
Filling bit is provided with in described N-DCI.
4. method according to claim 1, is characterized in that, the method comprises further:
When needing to use multiple N-DCI to send the E-PDCCH indication information of UE, described multiple N-DCI is distributed to each UE by network side respectively, and distributes a radio network temporary identifier N-RNTI for each N-DCI.
5. method according to claim 4, is characterized in that, the indication information of described N-DCI comprises:
The temporary identifier of the N-DCI corresponding to each UE and the information field mapping relations of each N-DCI.
6. strengthen an indicating means for down control channel resources, it is characterized in that, the method comprises:
User terminal UE obtains the indication information configured to the positional information of the E-PDCCH resource of described UE and new Downlink Control Information N-DCI from received high-level signaling; Wherein, the indication information of described N-DCI comprises: the temporary identifier of the N-DCI corresponding to each UE and the information field mapping relations of each N-DCI;
The N-DCI that described UE is corresponding with this UE according to the indication information search of described N-DCI, and the E-PDCCH indication information corresponding with this UE is known from the N-DCI searched;
Described UE, according to the positional information of described E-PDCCH indication information and described E-PDCCH resource, searches configuration to the E-PDCCH resource of described UE.
7. method according to claim 6, is characterized in that, described E-PDCCH indication information comprises:
Any one or more information in blind check indication information, decode-regulating information and demodulated reference signal DMRS port information.
8. method according to claim 6, is characterized in that, the N-DCI that described UE is corresponding with this UE according to the indication information search of described N-DCI, and from the N-DCI searched, know that the E-PDCCH indication information corresponding with this UE comprises:
Each UE, according to the temporary identifier of the N-DCI corresponding with self obtained from received high-level signaling, searches for the N-DCI corresponding with described UE in public search space;
When searching the N-DCI corresponding with described UE, the information field mapping relations according to the described N-DCI obtained from received high-level signaling read the E-PDCCH indication information corresponding with described UE in the N-DCI searched.
9. method according to claim 8, is characterized in that, described in public search space search for the N-DCI corresponding with described UE comprise:
The temporary identifier of the N-DCI of UE corresponding to self detects each N-DCI in public search space, and knows the N-DCI corresponding with described UE according to testing result.
10. strengthen an indication mechanism for down control channel resources, it is characterized in that, this indication mechanism comprises: network side entity needs with at least one the user terminal UE configuring E-PDCCH resource;
Described network side entity, for configuring E-PDCCH resource for described UE, and arranges new Downlink Control Information N-DCI; Configuration is sent to described UE to the indication information of the positional information of the E-PDCCH resource of described UE and described N-DCI by high-level signaling, and the E-PDCCH indication information of described UE is carried in described N-DCI sends to described UE;
Wherein, described network side arranges N-DCI and comprises:
Network side is arranged has the N-DCI of same number of bits with Downlink Control Information DCI format 0, and arranges the information field of one or more E-PDCCH indication information for carrying UE at described N-DCI according to the size of the E-PDCCH indication information of required transmission;
After arranging described N-DCI, network side arranges the information field mapping relations of described N-DCI;
Described information field mapping relations are used to indicate the relation mapped one by one between each information field in each UE and described N-DCI;
The described UE needing configuration E-PDCCH resource, for obtaining the indication information configured to the positional information of the E-PDCCH resource of described UE and new Downlink Control Information N-DCI from received high-level signaling; The N-DCI corresponding with described UE according to the indication information search of described N-DCI, and the E-PDCCH indication information corresponding with described UE is known from the N-DCI searched; And according to the positional information of described E-PDCCH indication information and described E-PDCCH resource, search configuration to the E-PDCCH resource of described UE.
11. 1 kinds of indicating equipments strengthening down control channel resources, it is characterized in that, this indicating equipment comprises: configuration module, arrange module and sending module;
Described configuration module, for configuring E-PDCCH resource for user terminal UE, sends to described sending module by configuration to the positional information of the E-PDCCH resource of described UE; The E-PDCCH indication information of described UE is sent to described module is set;
Described module being set, for arranging new Downlink Control Information N-DCI, and the E-PDCCH indication information of described UE being carried in described N-DCI; The indication information of described N-DCI and described N-DCI is sent to described sending module;
Wherein, the described N-DCI of setting comprises:
Arrange, with Downlink Control Information DCI format 0, there is the N-DCI of same number of bits, and the information field of one or more E-PDCCH indication information for carrying UE is set at described N-DCI according to the size of the E-PDCCH indication information of required transmission;
After described N-DCI is set, described the information field mapping relations that module also arranges described N-DCI are set;
Described information field mapping relations are used to indicate the relation mapped one by one between each information field in each UE and described N-DCI;
Described sending module, for configuration is sent to described UE to the indication information of the positional information of the E-PDCCH resource of described UE and described N-DCI by high-level signaling, and sends to described UE by described N-DCI.
12. 1 kinds of user terminals, is characterized in that, this user terminal comprises: receiver module, search module and source obtaining module;
Described receiver module, for obtaining the indication information configured to the positional information of the E-PDCCH resource of UE and new Downlink Control Information N-DCI from received high-level signaling; The positional information of described E-PDCCH resource is sent to described source obtaining module, the indication information of described new Downlink Control Information N-DCI is sent to described search module; Wherein, the indication information of described N-DCI comprises: the temporary identifier of the N-DCI corresponding to each UE and the information field mapping relations of each N-DCI;
Described search module, for the N-DCI that the indication information search according to described N-DCI is corresponding with this UE, and knows the E-PDCCH indication information corresponding with this UE from the N-DCI searched; Described E-PDCCH indication information is sent to described source obtaining module;
Described source obtaining module, for the positional information according to described E-PDCCH indication information and described E-PDCCH resource, searches configuration to the E-PDCCH resource of described UE.
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