CN102231915A

CN102231915A - Method for sending and receiving physical downlink control channel (PDCCH) signaling, base station, user equipment (UE) and system thereof

Info

Publication number: CN102231915A
Application number: CN2010101654387A
Authority: CN
Inventors: 曲秉玉; 官磊; 薛丽霞
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2010-02-11
Filing date: 2010-04-30
Publication date: 2011-11-02
Anticipated expiration: 2030-04-30
Also published as: CN102231915B

Abstract

The invention provides a method for sending and receiving physical downlink control channel (PDCCH) signaling, base station, user equipment (UE) and system thereof. The sending method comprises the following steps that: the base station determines positions of first search space and second search space; if a length of the PDCCH signaling which does not include carrier indicator field (CIF) in the first search space equals to the length of the PDCCH signaling which includes the CIF in the second search space and a physical overlapping area exists in the first search space and the second search space, the base station only sends the PDCCH signaling which does not include CIF to the UE in the physical overlapping area. By using the method, the base station, the UE and the system which are provided in embodiments of the invention, fuzzy scheduling of the base station can be avoided so that a problem of UE parse error can be avoided.

Description

PDCCH signaling method of sending and receiving, base station, UE and system

Technical field

The embodiment of the invention relates to communication technical field, relate in particular to a kind of Physical Downlink Control Channel (Physical Downlink Control Channel, abbreviation PDCCH) signaling method of sending and receiving, base station, subscriber equipment (User Equipment is called for short UE) and system.

Background technology

At the LTE of the evolution (LTE-Advanced of system, be called for short LTE-A) in, introduced carrier aggregation (Carrier Aggregation, be called for short CA) technology, be about to a plurality of member carriers (Component Carrier, abbreviation CC) resource is dispatched simultaneously to a subscriber equipment (User Equipment is called for short UE) and is used, to satisfy higher peak rate and business demand.

In the system that does not adopt the CA technology, a Physical Downlink Control Channel (Physical Downlink Control Channel is called for short PDCCH) signaling is only to dispatch the resource of a carrier wave.In the system that has adopted the CA technology, if a UE polymerization a plurality of carrier waves transmit data, then UE needs corresponding a plurality of PDCCH signalings.

In the LTE-A system, there is the dual mode can scheduling resource.A kind of mode is same carrier dispatching (Same-CC Scheduling, be called for short SCS), and promptly the PDCCH signaling on certain carrier wave is only to dispatch the resource of this carrier wave or the up-link carrier corresponding with this carrier wave.Another kind of mode is to stride carrier dispatching (Cross-CC Scheduling is called for short CCS), i.e. the resource that can dispatch this carrier wave or other carrier waves of PDCCH signaling on certain carrier wave.In striding the carrier dispatching mode, need adding carrier wave directive territory (Carrier Indicator Field, be called for short CIF) in the specific PDCCH signaling of UE, to indicate the PDCCH signaling be to be used to dispatch resource on which carrier wave.Especially, can not add CIF in the public PDCCH signaling of multi-user, so that the coexistence of the UE in UE in the LTE-A system and the LTE system.

The base station is by sending semi-static Radio Resource control (Radio Resource Control is called for short RRC) signaling UE, any scheduling of resource mode of current concrete employing.Promptly notifying UE current is to adopt CCS mode or SCS mode.When UE adopted SCS mode scheduling resource under the RRC idle condition or under the RRC connection status, the PDCCH signaling did not comprise CIF.When UE adopts CCS mode scheduling resource under connection status, comprise CIF in the PDCCH signaling.The base station sends semi-static RRC signaling to after the UE, if UE has received this semi-static RRC signaling, then UE can detect and resolve the PDCCH signaling according to the scheduling of resource mode of indicating in the semi-static RRC signaling.But, the base station issues after the semi-static RRC signaling, the RRC that need receive UE feedback connects to reshuffle and could determine that UE has correctly received semi-static RRC signaling after finishing signaling (RRC Connection Reconfiguration Complete), the base station issue semi-static RRC signaling receives UE feedback to the base station RRC connect reshuffle finish signaling during this period of time in, there is the fuzzy problem of scheduling in the base station.

Have following problem in the prior art: the base station issue semi-static RRC signaling receives UE feedback to the base station RRC connect reshuffle finish signaling during this period of time in, there is the fuzzy problem of scheduling in the base station, thus the problem of the UE parse error that causes.

Summary of the invention

The embodiment of the invention provides a kind of PDCCH signaling method of sending and receiving, base station, UE and system, in order to solve in the prior art owing to do not comprise the PDCCH signaling length of CIF among the CSS of current carrier wave, with be used for dispatching other bandwidth on the current carrier wave and comprise the equal in length of the PDCCH signaling of CIF, the problem of the UE parse error that causes less than the UESS of another carrier wave of current carrier wave.

The embodiment of the invention provides a kind of PDCCH signaling method, comprising:

Determine first search volume of UE and the position of second search volume;

If do not comprise the length of the PDCCH signaling of carrier wave directive territory CIF in described first search volume, with the equal in length that comprises the PDCCH signaling of CIF in described second search volume, and there are the physics overlapping region in described first search volume and second search volume, then in described physics overlapping region, only send the described PDCCH signaling of CIF that do not comprise to described UE.

The embodiment of the invention also provides a kind of PDCCH signaling method, comprising:

Determine first search volume of UE and the position of second search volume;

If in described first search volume, do not comprise the length of the PDCCH signaling of carrier wave directive territory CIF, with the equal in length that comprises the PDCCH signaling of CIF in described second search volume, and described first search volume and second search volume exist under the situation of physics overlapping region, in described physics overlapping region, after the radio resource control RRC connection reconfiguration that receives described UE transmission is finished signaling, only send the described PDCCH signaling that comprises CIF to described UE.

Determine first search volume of UE and the position of second search volume;

If the length of the PDCCH signaling in described first search volume, equal in length with the 2nd PDCCH signaling in described second search volume, a described PDCCH signaling is not for comprising the PDCCH signaling of carrier wave directive territory CIF, described the 2nd PDCCH signaling is the PDCCH signaling that comprises CIF, and there are the physics overlapping region in described first search volume and second search volume, then in described physics overlapping region, reshuffling in the time interval of finishing signaling to the RRC connection that receives described UE feedback to described UE transmission radio resource control RRC signaling, send the 3rd PDCCH signaling or the 4th PDCCH signaling to described UE, described the 3rd PDCCH signaling is not for comprising the PDCCH signaling of CIF, described the 4th PDCCH signaling is the PDCCH signaling that comprises CIF, and the signaling length of the signaling length of described the 3rd PDCCH signaling and described the 4th PDCCH signaling is unequal, the length of described the 3rd PDCCH signaling is different from the length of a described PDCCH signaling, and the length of described the 4th PDCCH signaling is different from the length of a described PDCCH signaling.

The embodiment of the invention also provides a kind of PDCCH signaling method of reseptance, comprising:

The length that in first search volume of user equipment (UE), does not comprise the PDCCH signaling of carrier wave directive territory CIF, with the equal in length that comprises the PDCCH signaling of CIF in second search volume of described UE, and there are the physics overlapping region in described first search volume and described second search volume, then in described physics overlapping region, receive the PDCCH signaling do not comprise CIF, and only resolve the described PDCCH signaling that does not comprise CIF according to the resolution rules that is provided with to the PDCCH signaling that do not comprise CIF.

The length that in first search volume of user equipment (UE), does not comprise the PDCCH signaling of carrier wave directive territory CIF, with the equal in length that comprises the PDCCH signaling of CIF in second search volume of described UE, and there are the physics overlapping region in described first search volume and described second search volume, then in described physics overlapping region, after correctly having resolved the radio resource control RRC signaling that comes from the base station at described UE, reception comprises the PDCCH signaling of CIF, and only resolves the PDCCH signaling of the described CIF of comprising according to the resolution rules to the PDCCH signaling that comprises CIF that is provided with.

The embodiment of the invention also provides a kind of base station, comprising:

First determination module is used for determining first search volume of UE and the position of second search volume;

First sending module, be used for after described first determination module is determined the position of first search volume of UE and second search volume, the PDCCH signaling length that in described first search volume, does not comprise CIF, with the PDCCH signaling equal in length that comprises CIF in described second search volume, and described first search volume and second search volume exist under the situation of physics overlapping region, in described physics overlapping region, only transmission does not comprise that the PDCCH signaling of CIF is to described UE.

Second determination module is used for determining first search volume of user equipment (UE) and the position of second search volume;

Second sending module, be used for after described first determination module is determined the position of first search volume of described UE and second search volume, if the length of the PDCCH signaling in described first search volume, equal in length with the 2nd PDCCH signaling in described second search volume, a described PDCCH signaling is not for comprising the PDCCH signaling of carrier wave directive territory CIF, described the 2nd PDCCH signaling is the PDCCH signaling that comprises CIF, and there are the physics overlapping region in described first search volume and second search volume, then in described physics overlapping region, reshuffling in the time interval of finishing signaling to the RRC connection that receives described UE feedback to described UE transmission radio resource control RRC signaling, send the 3rd PDCCH signaling or the 4th PDCCH signaling to described UE, described the 3rd PDCCH signaling is not for comprising the PDCCH signaling of CIF, described the 4th PDCCH signaling is the PDCCH signaling that comprises CIF, and the signaling length of the signaling length of described the 3rd PDCCH signaling and described the 4th PDCCH signaling is unequal, the length of described the 3rd PDCCH signaling is different from the length of a described PDCCH signaling, and the length of described the 4th PDCCH signaling is different from the length of a described PDCCH signaling.

The 3rd determination module is used for determining first search volume of user equipment (UE) and the position of second search volume;

The 3rd sending module, be used for after described the 3rd determination module is determined the position of first search volume of user equipment (UE) and second search volume, if in described first search volume, do not comprise the length of the PDCCH signaling of carrier wave directive territory CIF, with the equal in length that comprises the PDCCH signaling of CIF in described second search volume, and described first search volume and second search volume exist under the situation of physics overlapping region, in described physics overlapping region, after the radio resource control RRC connection reconfiguration that receives described UE transmission is finished signaling, only send the described PDCCH signaling that comprises CIF to described UE.

The embodiment of the invention also provides a kind of UE, comprising:

Receiver module, be used for not comprising the PDCCH signaling length of CIF in first search volume, with the PDCCH signaling equal in length that comprises CIF in second search volume, and described first search volume and second search volume exist under the situation of physics overlapping region, in described physics overlapping region, receive the PDCCH signaling that does not comprise CIF that the base station sends;

Parsing module only is used for resolving the PDCCH signaling that described receiver module receives according to the resolution rules to the PDCCH signaling that do not comprise CIF that is provided with.

The embodiment of the invention also provides a kind of UE, comprising:

Second receiver module, be used for not comprising the length of the PDCCH signaling of carrier wave directive territory CIF in first search volume of described UE, with the equal in length that comprises the PDCCH signaling of CIF in second search volume of described UE, and described first search volume and second search volume exist under the situation of physics overlapping region, in described physics overlapping region, after correctly having resolved the radio resource control RRC configuration signal that comes from the base station at described UE, receive the described PDCCH signaling that comprises CIF;

Second parsing module only is used for resolving according to the resolution rules to the PDCCH signaling that comprises CIF that is provided with the PDCCH signaling of the described CIF of comprising that described receiver module receives.

The embodiment of the invention also provides a kind of communication system, comprises foregoing base station and the foregoing UE that comprises receiver module and parsing module that comprises first determination module and first sending module.

The embodiment of the invention also provides a kind of communication system, comprises UE and the foregoing base station that comprises second determination module and second sending module.

The PDCCH signaling method of sending and receiving, base station, UE and the system that provide by the embodiment of the invention, can avoid the scheduling of base station fuzzy, and UE is after receiving the PDCCH signaling, just can determine to comprise in the PDCCH signaling CIF or not comprise CIF, thereby can avoid the parse error of UE.

Description of drawings

In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply, apparently, accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Figure 1 shows that the flow chart of an embodiment of PDCCH signaling method of the present invention;

Figure 2 shows that the flow chart of another embodiment of PDCCH signaling method of the present invention;

Figure 3 shows that the flow chart of another embodiment of PDCCH signaling method of the present invention;

Figure 4 shows that the flow chart of another embodiment of PDCCH signaling method of the present invention;

Figure 5 shows that the flow chart of an embodiment of PDCCH signaling method of reseptance of the present invention;

Figure 6 shows that the flow chart of another embodiment of PDCCH signaling method of reseptance of the present invention;

Figure 7 shows that the flow chart of another embodiment of PDCCH signaling method of reseptance of the present invention;

Figure 8 shows that the structural representation of an embodiment of base station of the present invention;

Figure 9 shows that the structural representation of another embodiment of base station of the present invention;

Figure 10 shows that the structural representation of UE embodiment of the present invention.

Embodiment

For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.

In Long Term Evolution (Long Term Evolution is called for short LTE) system, base station (eNB) and UE carry out scheduling of resource on a carrier wave.The minimum time unit of base station scheduling resource is a subframe, length is 1 millisecond, the UE that is scheduled in the search volume of PDCCH according to the signaling length of PDCCH and the control channel unit of search volume (Control Channel Element, abbreviation CCE) after rank is carried out the demodulation sign indicating number to the PDCCH signaling, with self radio network temporary mark (Radio Network Temporary Identifier, be called for short RNTI) descrambling cyclic redundancy check (CRC) (Cyclic Redundancy Check, be called for short CRC) come verification and determine current detection to the PDCCH signaling whether be the PDCCH signaling of oneself, after determining to be the PDCCH signaling of oneself, further do follow-up processing.Carried the time-frequency resource allocating information of indication physical data channel (physical data channel can be upstream or downstream) in the PDCCH signaling.

Search volume is the set of a string continuous in logic CCE, and CCE is a minimum unit of forming the PDCCH signaling.The PDCCH signaling of UE can adopt four kinds of CCE grades to transmit, and is respectively 1,2,4 and 8, and different CCE grades have different code rates.The PDCCH signaling of different CCE grades has different search volumes, but physically, the search volume of different PDCCH signalings can overlap, and can comprise the CCE of part or all of same numeral in the promptly different search volumes.

The search volume can be divided into CSS and UESS, and CSS is different search volumes with UESS, but can overlap physically, can comprise the CCE of part or all of same numeral in the promptly different search volumes.CSS is that all UE need the space detected, and CSS comprises 16 CCE, can only transmit the CCE grade and be 4 or 8 PDCCH signaling, and the searching times in the CSS corresponding with these two kinds of CCE grades is respectively 4 and 2 (4*4=8*2=16).Each UE has a specific UESS, and each UESS is determined that by specific RNTI and subframe numbers the CCE grade that UESS can comprise is 1,2,4 and 8, is respectively 6,6,2 and 2 with searching times in these four kinds of corresponding UESS of CCE grade.

The PDCCH signaling is according to the difference of the transmission means of data dispatching, resource distribution mode etc., have different DCI forms, for example comprise Downlink Control Information (Downlink Control Information, abbreviation DCI) form 0, DCI form 1A, DCI form 1B, DCI form 1C, DCI form 1D, DCI form 1, DCI form 2, DCI form 2A, DCI form 2, DCI form 3A or the like, the length of the PDCCH signaling of different DCI forms is normally different, and the RNTI of scrambling also can be different on the PDCCH signaling.

The PDCCH signaling of dispatching the public information of some multi-users can be placed among the CSS to be transmitted, the RNTI of scrambling also can be the public RNTI of some multi-users, for example can be paging RNTI (Paging RNTI), system information RNTI (System Information RNTI), insert and to reply RNTI (RACH Response RNTI) and the relevant RNTI of transmission power control (Transmission Power Control is called for short TPC) at random.

The PDCCH signaling of the specific RNTI scrambling of UE generally is placed among the UESS to be transmitted, for example use semi-continuous scheduling-sub-district-RNTI (Semi-Persistent Scheduling-Cell-RNTI, be called for short SPS-C-RNTI) or the PDCCH signaling of sub-district RNTI (Cell-RNTI is called for short C-RNTI) scrambling.

The PDCCH signaling of DCI form 1A can be transmitted in CSS, uses paging RNTI, system information RNTI or inserts at random and reply the RNTI scrambling.The PDCCH signaling of DCI form 1A also can be transmitted in UESS, uses sub-district RNTI or SPS-C-RNTI scrambling.

The length of the PDCCH signaling of DCI form 1A is identical with the length of the PDCCH signaling of DCI form 3, DCI form 3A and DCI form 0, and the Head Section of the PDCCH signaling of DCI form 1A and the PDCCH signaling of DCI form 0 divides bit to be used for distinguishing this two signalings.The PDCCH signaling of DCI form 1A and the PDCCH signaling of DCI form 0 with the PDCCH signaling of DCI form 3 and the PDCCH signaling of DCI form 3A, adopt different RNTI scramblings to show difference.

By the PDCCH signaling of the DCI form 1A of sub-district RNTI scrambling and SPS-C-RNTI scrambling, can in UESS, transmit, also can in CSS, transmit, can't cause the PDCCH signaling to detect number of times like this increases.The number of times that UE detects the PDCCH signaling is relevant with signaling length, and many a kind of signaling length will how a series of detection number of times.Because the PDCCH signaling of DCI form 3 that transmits in CSS or DCI form 3A always needs detected, and these two kinds of PDCCH signalings all with the equal in length of the PDCCH signaling of DCI form 0 and DCI form 1A, so the number of times that can't cause UE to detect the PDCCH signaling increases.

The base station can be according to the difference of data transfer mode, resource distribution mode etc., is a kind of in 7 kinds of transmission modes of UE configuration by semi-static RRC signaling.Under every kind of transmission mode, UE needs to detect the PDCCH signaling of two kinds of DCI forms, a kind of PDCCH signaling of DCI form is relevant with the transmission mode for the current distribution of UE, the PDCCH signaling of another kind of DCI form is with being the irrelevant DCI form 1A of the transmission mode of the current distribution of UE and the PDCCH signaling of DCI form 0, that is to say, no matter what the transmission mode of distributing for UE is, UE needs to detect the PDCCH signaling of DCI form 1A and DCI form 0.For example, if being UE, the base station distributed transmission mode 3, open loop multiple-input and multiple-output (Multiple Input Multiple Output is called for short MIMO) transmission mode, then UE need detect the PDCCH signaling of DCI form 2A, and UE also needs to detect the PDCCH signaling of DCI form 0 and DCI form 1A.Wherein, the PDCCH signaling of DCI form 2A is relevant with transmission mode 3.If being UE, the base station distributed transmission mode 4, the closed-loop MIMO transmission mode, and then UE need detect the PDCCH signaling of DCI form 2, and UE also needs to detect the PDCCH signaling of DCI form 0 and DCI form 1A.Wherein, the PDCCH signaling of DCI form 2 is relevant with transmission mode 4.

Suppose a kind of scenario A: send in the base station after the semi-static RRC signaling be used to notify the current scheduling of resource mode of UE and to receive to the base station that RRC connection that UE returns is reshuffled and finish signaling during this period of time, and the base station receive RRC that UE returns connect reshuffle finish signaling after, the length that does not comprise the PDCCH signaling of the DCI form 0 of CIF or DCI form 1A among the CSS of current carrier wave, might and current carrier wave on be used for dispatching other bandwidth comprise the another kind of form of CIF less than the UESS of another carrier wave of current carrier wave the equal in length of PDCCH signaling, if there are the physics overlapping region in CSS and UESS, to cause UE to resolve in the PDCCH signaling that the physics overlapping region searches mistakenly is the resource that is used to dispatch on the current carrier wave, still is used for the resource of scheduling bandwidth less than other carrier waves of current carrier wave.

For example, article one, signaling is the PDCCH signaling that does not comprise DCI form 0 or the 1A of CIF among the CSS of current carrier wave CC1, and another signaling is to be used for dispatching other bandwidth comprise the another kind of form of CIF less than the UESS of the carrier wave CC2 of carrier wave CC1 PDCCH signaling on the current carrier wave CC1.Because the bandwidth of the carrier wave CC2 that is scheduled is less than the bandwidth of carrier wave CC1, resource allocation bit number required in the PDCCH signaling is just few, so, the length that does not comprise the PDCCH signaling of the DCI form 0 of CIF or 1A among the CSS of current carrier wave CC1, may with current carrier wave CC1 on be used for dispatching other bandwidth comprise the another kind of form of CIF less than the UESS of the carrier wave CC2 of carrier wave CC1 PDCCH signaling equal in length.When there are the physics overlapping region in CSS and UESS, it is the resource that is used for scheduling carrier wave CC1 that UE may resolve the PDCCH signaling that searches at the physics overlapping region mistakenly, still is used for the resource of scheduling carrier wave CC2.

With the downlink data is example, in case UE resolves the PDCCH signaling mistakenly, will be on the carrier wave of mistake downlink data receiving, follow-up UE may not confirm (NACK) information to one of base station feedback, the base station can resend original data, but the still uncertain PDCCH signaling of how correctly resolving of UE, UE still can not correctly receive data, keeping misdata in the buffer area of UE always, till the base station reaches maximum retransmission, so just caused the automatic repeat requests of mixing (Hybrid Automatic Repeat-reQuest the is called for short HARQ) buffer memory of UE to pollute.

Introduce how solving the above problems of the embodiment of the invention below in detail.In various embodiments of the present invention, can suppose, under this data resource scheduling mode of CCS, do not comprise CIF in the DCI form 1A that in CSS, transmits or the PDCCH signaling of DCI form 0, and the PDCCH signaling of this DCI form 1A or DCI form 0 is only to dispatch the resource on this PDCCH signaling current place carrier wave or the up-link carrier corresponding with this carrier wave.

Perhaps, also can suppose, under this scheduling of resource mode of CCS, not comprise CIF in the PDCCH signaling of in certain UESS, transmitting, and this PDCCH signaling is only to dispatch the resource on this signaling current place carrier wave or the up-link carrier corresponding with this carrier wave.

Be illustrated in figure 1 as the flow chart of an embodiment of PDCCH signaling method of the present invention, comprise:

The position of first search volume and second search volume is determined in step 101, base station.The PDCCH signaling of transmitting in first search volume can not comprise CIF, first search volume can be CSS and or UESS, the signaling of transmitting in second search volume can comprise CIF, second search volume can be UESS.

If do not comprise the length of the PDCCH signaling of CIF in step 102 first search volume, with the PDCCH signaling equal in length that comprises CIF in second search volume, there are the physics overlapping region in first search volume and second search volume, then in the physics overlapping region, the base station sends and does not comprise that the PDCCH signaling of CIF is to UE.

Can comprise resource allocation information and other control information in the PDCCH signaling that the base station sends, for example, can comprise that carrier wave activates or deexcitation information, can comprise the information that is used to trigger the physical accidental access procedure.

The overlapping region that embodiment as shown in Figure 1 limits two search volumes is used to transmit one of them search volume PDCCH signaling, be the orthogonalized method in a kind of search volume in fact, can also adopt the method for a kind of search volume quadrature, promptly make two search volumes not overlap, thereby solve owing to do not comprise the scheduling fuzzy problem of the base station that the PDCCH signaling equal in length that comprises CIF in the length of PDCCH signaling of CIF and second search volume causes in first search volume, if for example the physics overlapping takes place in CSS and UESS, then can also not change the CCE size of CSS and UESS, and fixation of C SS invariant position, make UESS and CSS not overlap by a configuration parameter, particularly, UESS and CSS are placed continuously.

Be illustrated in figure 5 as the flow chart of an embodiment of PDCCH signaling method of reseptance of the present invention, comprise:

If do not comprise the length of the PDCCH signaling of CIF in step 501 first search volume, with the PDCCH signaling equal in length that comprises CIF in second search volume, and there are the physics overlapping region in first search volume and second search volume, then in the physics overlapping region, UE receives the PDCCH signaling that does not comprise CIF that the base station sends.

Step 502, according to the rule parsing PDCCH signaling that is provided with.The rule of this setting can the regulation base station and UE resolve according to the implication according to making an appointment of each field in the PDCCH signaling.

If do not comprise CIF in the PDCCH signaling that the base station sends, after UE receives the PDCCH signaling so, can resolve according to the resolution rules that does not comprise CIF in the PDCCH signaling.Which type of resolution rules UE specifically adopts, can be good by UE and base station as offered.

In the above embodiments, the length that in first search volume, does not comprise the PDCCH signaling of CIF, with the PDCCH signaling equal in length that comprises CIF in second search volume, and first search volume and second search volume exist under the situation of physics overlapping region, require the base station to send and do not comprise that the PDCCH signaling of CIF is to UE, like this, what send to UE is the PDCCH signaling that does not comprise CIF all the time, UE just can determine that the PDCCH signaling that receives at the physics overlapping region must be not comprise CIF, the resource of distributing in the PDCCH signaling also determines to be used to carry the resource on the carrier wave of this PDCCH signaling, also just can not cause the UE parse error.

For example, send in the base station after the semi-static RRC signaling be used to notify the current scheduling of resource mode of UE and to receive that to the base station configure-ack that UE returns finishes signaling during this period of time, and after the base station configure-ack that receives UE feedback finishes signaling, if be used for carrying the length that the CSS of the current carrier wave of PDCCH signaling does not comprise the PDCCH signaling of the DCI form 0 of CIF or DCI form 1A among the UE, with be used for dispatching the equal in length of PDCCH signaling that the UESS of other bandwidth less than this UE of another carrier wave of current carrier wave comprises the another kind of form of CIF on the current carrier wave, and there are the physics overlapping region in CSS and UESS, so, the base station sends at the physics overlapping region and does not comprise the PDCCH signaling of CIF, and carries the resource allocation information at UE in this signaling.In one embodiment, UE can be good with the base station as offered, all do not comprise CIF in the PDCCH signaling that sends in the physics overlapping region.So, UE just can determine that this PDCCH signaling must be not comprise CIF after receiving the PDCCH signaling, and the resource of distributing in this PDCCH signaling also determines to be used to carry the resource on the carrier wave of this PDCCH signaling, also just can not cause the UE parse error.

In Fig. 1 and embodiment shown in Figure 5, first search volume can be CSS, and second search volume is the particular UE SS of UE, and the CCE grade of first search volume and second search volume can be 4 or 8.Perhaps, first search volume and second search volume comprise two UESS of the different members carrier wave that is used to dispatch UE.

Among the embodiment as shown in Figure 1, if first search volume is CSS, second search volume is UESS, to the restriction of second search volume is not very big, because in second search volume, even 4 or the PDCCH signaling length of 8CCE grade and the PDCCH signaling equal in length that does not add CIF among the CSS and cause at the physics overlapping region and can't dispatch this PDCCH signaling, but the base station can also be this PDCCH signaling of 1 or 2 in physics overlapping region transmission CCE grade.Cause at the physics overlapping region and can't dispatch this PDCCH even the CCE grade is 4 PDCCH signaling length and the PDCCH signaling equal in length that does not add CIF among the CSS, if overlap with CSS but the CCE grade is 8 search volume, it is this PDCCH signaling of 8 that the CCE grade also might be dispatched in the base station.

In the above embodiments, the base station issue the RRC signaling receives UE feedback to the base station RRC connect reshuffle finish signaling during this period of time in, the base station can know clearly user terminal according to which kind of mode receives, thereby has solved the control signaling that the causes base station problem at UE side parse error.

In addition, keep whole scheduling degrees of freedom of first search volume fully, promptly first search volume has not been produced any scheduling restriction, therefore maximizedly solved the fuzzy problem of scheduling that RRC reshuffles base stations during.

Be illustrated in figure 2 as the flow chart of another embodiment of PDCCH signaling method of the present invention, comprise:

The position of first search volume and second search volume is determined in step 201, base station.

Step 202, if the length of the PDCCH signaling in described first search volume, equal in length with the 2nd PDCCH signaling in described second search volume, a described PDCCH signaling is not for comprising the PDCCH signaling of carrier wave directive territory CIF, described the 2nd PDCCH signaling is the PDCCH signaling that comprises CIF, and there are the physics overlapping region in described first search volume and second search volume, then in described physics overlapping region, reshuffling in the time interval of finishing signaling to the RRC connection that receives described UE feedback to described UE transmission radio resource control RRC signaling, send the 3rd PDCCH signaling or the 4th PDCCH signaling to described UE, described the 3rd PDCCH signaling is not for comprising the PDCCH signaling of CIF, described the 4th PDCCH signaling is the PDCCH signaling that comprises CIF, and the signaling length of the signaling length of described the 3rd PDCCH signaling and described the 4th PDCCH signaling is unequal, the length of described the 3rd PDCCH signaling is different from the length of a described PDCCH signaling, and the length of described the 4th PDCCH signaling is different from the length of a described PDCCH signaling.The base station receive RRC that UE returns connect reshuffle finish signaling after, the base station sends described the 2nd PDCCH signaling, comprises that promptly the PDCCH signaling of CIF is given UE.Above-mentioned the 3rd PDCCH signaling or the 4th PDCCH signaling can be the PDCCH signaling of other kinds except a PDCCH signaling and the 2nd PDCCH signaling, the PDCCH signaling of other kinds except a PDCCH signaling and the 2nd PDCCH signaling that above-mentioned described base station sends is that the base station knows not the PDCCH signaling that can be resolved mistakenly by UE.For example, the PDCCH signaling that two kinds of forms are arranged under current every kind of transmission mode, for the two kinds of PDCCH signalings (adding CIF) under certain transmission mode of the carrier wave correspondence of being striden carrier dispatching, suppose not add among the wherein a kind of CSS of and PDCCH place carrier wave the PDCCH signaling equal in length of certain form of CIF, then eNB can send another the PDCCH signaling under the present mode, the be uneven in length PDCCH signaling length of certain form of not adding CIF in the CSS of PDCCH place carrier wave of its signaling, this moment, UE can wrong this PDCCH signaling of parsing.Perhaps, may also have two kinds of specific PDCCH signalings of UE that do not add CIF among the CSS of PDCCH place carrier wave, wherein a kind of may be by the parsing of UE mistake, then the base station can send and another kind ofly not add the PDCCH signaling of CIF to UE.

Be illustrated in figure 6 as the flow chart of another embodiment of PDCCH signaling method of reseptance of the present invention, comprise:

If do not comprise the length of the PDCCH signaling of CIF in step 601 first search volume, with the PDCCH signaling equal in length that comprises CIF in second search volume, and there are the physics overlapping region in first search volume and second search volume, then in the physics overlapping region, after UE correctly resolved the RRC signaling, UE received the PDCCH signaling that comprises CIF that the base station sends.

Step 602, UE are only resolved the PDCCH signaling of the described CIF of comprising according to the resolution rules to the PDCCH signaling that comprises CIF that is provided with.

If comprise CIF in the PDCCH signaling that the base station sends, after UE receives the PDCCH signaling so, can resolve according to the resolution rules that comprises CIF in the PDCCH signaling.Which type of resolution rules UE specifically adopts, can be good by UE and base station as offered.

In the above embodiments, the length that in first search volume, does not comprise the PDCCH signaling of CIF, with the PDCCH signaling equal in length that comprises CIF in second search volume, and first search volume and second search volume exist under the situation of physics overlapping region, send the RRC signaling in the time interval of the affirmation signaling that receives the UE feedback in the base station, the base station cannot send the PDCCH signaling of the above-mentioned CIF of comprising, because UE may not receive correct RRC configuration signal, UE can think that the PDCCH signaling that receives does not comprise CIF so, thereby causes parse error.So the base station receives after configure-ack that UE returns finishes signaling, the PDCCH signaling that can send the above-mentioned CIF of comprising is to UE; But send the RRC signaling in the time interval of the affirmation signaling that receives the UE feedback in the base station, the base station only with the PDCCH signaling of other kinds of transmission except a PDCCH signaling and the 2nd PDCCH signaling to UE.And for the UE side, after UE correctly resolved the RRC configuration signal, UE received only the PDCCH signaling that comprises CIF that above-mentioned base station sends.

Among the embodiment as shown in Figure 2, first search volume can be CSS, and second search volume is the particular UE SS of UE, and the CCE grade of first search volume and second search volume is 4 or 8.Perhaps, first search volume and second search volume comprise two UESS of the different members carrier wave that is used to dispatch UE.

If first search volume is CSS, second search volume is UESS, then adopts the method among the embodiment as shown in Figure 2, can not increase the detection number of times of the PDCCH signaling of first search volume.In addition, because the scheduling degree of freedom of second search volume is big (because carrier dispatching can be realized striding in second search volume than first search volume, and first search volume only allows same carrier dispatching), therefore this programme has kept whole scheduling degrees of freedom of second search volume fully, second search volume is not produced any scheduling restriction.

Be illustrated in figure 3 as the flow chart of another embodiment of PDCCH signaling method of the present invention, comprise:

The position of first search volume and second search volume is determined in step 301, base station.

Step 302, if the length of the PDCCH signaling in first search volume, equal in length with the 2nd PDCCH signaling in second search volume, a described PDCCH signaling is not for comprising the PDCCH signaling of carrier wave directive territory CIF, described the 2nd PDCCH signaling is the PDCCH signaling that comprises CIF, there are the physics overlapping region in first search volume and second search volume, then in described physics overlapping region, send the RRC signaling in the time interval of the affirmation signaling that receives the UE feedback in the base station, the base station sends the PDCCH signaling of other kinds except a PDCCH signaling and the 2nd PDCCH signaling to UE.

The PDCCH signaling of above-mentioned other kinds except a PDCCH signaling and the 2nd PDCCH signaling can be the 3rd PDCCH signaling or the 4th PDCCH signaling, described the 3rd PDCCH signaling is not for comprising the PDCCH signaling of CIF, described the 4th PDCCH signaling is the PDCCH signaling that comprises CIF, and the signaling length of the signaling length of described the 3rd PDCCH signaling and described the 4th PDCCH signaling is unequal.

Embodiment as shown in Figure 3 can solve the problem that exists in the following scenario B.

For example, scenario B: on a carrier wave, independently UESS is arranged separately if dispatch the PDCCH signaling of two carrier waves, and when these two UESS have the physical overlap zone, after the base station sends the semi-static RRC signaling be used to notify the current scheduling of resource mode of UE, receive to the base station configure-ack that UE returns finish signaling during this period of time in, the problem that also can exist base station scheduling to blur.For example, before sending, the scheduling of resource mode of UE is SCS, and base station transmits is given in the PDCCH signaling of UE and do not comprised CIF.UE receive be used to notify the semi-static RRC signaling of the current scheduling of resource mode of UE after, the scheduling of resource mode of UE becomes CCS.And the base station do not receive the configure-ack of UE feedback finish signaling during this period of time in, whether need to comprise CIF in the PDCCH signaling of the uncertain UE of sending in base station, so just caused the scheduling of base station to be blured.And the RRC configuration signal that has correctly received the base station as UE has switched to the CCS pattern, the PDCCH that dispatches among then above-mentioned two UESS can add CIF, the PDCCH signaling of meeting automatic distinguishing scheduling different carrier is not even two signaling equal in length that the PDCCH of CIF is all arranged can produce the problems referred to above yet.

At this situation of scenario B, can not send semi-static RRC signaling in the time interval that receives the affirmation signaling that UE returns by the restriction base station, only a transmission comprises the PDCCH signaling of CIF or does not comprise that the PDCCH signaling of CIF solves.If finish in the time interval of confirming signaling to the configuration that receives the UE feedback in the semi-static RRC signaling of transmission the restriction base station, only send the PDCCH signaling that does not comprise CIF, and UE has correctly resolved semi-static RRC signaling, then UE can think and comprises CIF in the PDCCH signaling that receives, thereby causes the UE parse error.If connecting to the RRC that receives the UE feedback in the semi-static RRC signaling of transmission, the restriction base station reshuffles in the time interval of finishing signaling, only send the PDCCH signaling that comprises CIF, and the semi-static RRC signaling of the incorrect parsing of UE, UE can think that the PDCCH signaling that receives does not comprise CIF so, thereby causes the UE parse error.

If adopt embodiment as shown in Figure 3, the base station so just can avoid the scheduling of base station fuzzy in the PDCCH signaling of other kinds of physics overlapping region transmission except a PDCCH signaling and the 2nd PDCCH signaling, also can avoid the parse error of UE.

The RRC that receives UE feedback in the base station connect reshuffle finish signaling after, the scheduling of resource mode of UE becomes CCS, even there is the physics overlapping region in two UESS of UE, owing to all comprise CIF in the PDCCH signaling under the CCS pattern, can there be the fuzzy problem of scheduling in the base station yet, and UE parse error can not take place yet.

Among the embodiment as shown in Figure 3, first search volume and described second search volume comprise two UESS of the different members carrier wave that is used to dispatch UE.

Adopt the method among the embodiment as shown in Figure 3, the method that realizes by base station self has solved the UE mistake and has resolved the problem of PDCCH, and need not any behavior of regulation UE, that is to say operation to UE without any influence, and method is simple, and is easy and simple to handle.

In one embodiment, two the member carrier CC1 of a UE and CC2, the PDCCH signaling is placed on CC1 and goes up transmission, CC1 comprises search volume CSS, search volume UESS1 and search volume UESS2, PDCCH signaling among the CSS on the CC1 is used to dispatch this member carrier CC1, and this PDCCH signaling does not comprise CIF, PDCCH signaling among the last UESS1 of CC1 is used to dispatch this member carrier CC1, and this PDCCH signaling does not comprise CIF, PDCCH signaling among the UESS2 on the CC1 is used to stride carrier dispatching CC2, and this PDCCH signaling comprises CIF.

In one case, the length that in UESS1, does not comprise the PDCCH signaling of CIF, with the equal in length of the PDCCH signaling that comprises CIF among the UESS2, and UESS1 and UESS2 are when existing the physics overlapping region, in this physics overlapping region, the base station sends and does not comprise that the PDCCH signaling of CIF is to UE; And the length that does not comprise the PDCCH signaling of CIF among the CSS, equal in length with the PDCCH signaling that comprises CIF among the UESS2, and when there are the physics overlapping region in CSS and UESS2, in this physics overlapping region, the base station sends and comprises that the PDCCH signaling of CIF is to UE, the length that then in UESS1, does not comprise the PDCCH signaling of CIF, the length that comprises the PDCCH signaling of CIF among the UESS2, equate with the length three of the PDCCH signaling that does not comprise CIF among the UESS1, in the common overlapping region of three, there is the fuzzy problem of scheduling.

Perhaps,

The length that in UESS1, does not comprise the PDCCH signaling of CIF, with the equal in length of the PDCCH signaling that comprises CIF among the UESS2, and UESS1 and UESS2 be when existing the physics overlapping region, and in the physics overlapping region, the base station sends and comprises that the PDCCH signaling of CIF is to UE; And the length that does not comprise the PDCCH signaling of CIF among the CSS, equal in length with the PDCCH signaling that comprises CIF among the UESS2, and when there are the physics overlapping region in CSS and UESS2, in the physics overlapping region, the base station sends and does not comprise that the PDCCH signaling of CIF is to UE, the length that then in UESS1, does not comprise the PDCCH signaling of CIF, the length that comprises the PDCCH signaling of CIF among the UESS2, equate with the length three of the PDCCH signaling that does not comprise CIF among the UESS1, in the common overlapping region of three, there is the fuzzy problem of scheduling.

Based on above-mentioned situation, in one embodiment, at above-mentioned three's overlapping region, the base station only send do not comprise CIF the PDCCH signaling to UE; Perhaps the base station only send comprise CIF the PDCCH signaling to UE.

If in three's the overlapping region, the base station only send do not comprise CIF the PDCCH signaling to UE, data can priority scheduling on the carrier wave CC1 that places the PDCCH channel, then guaranteed the dispatching priority of this carrier wave, guaranteed RRC reshuffle during the seamlessly transitting of scheduling;

If in three's the overlapping region, the base station only send comprise CIF the PDCCH signaling to UE, then guaranteed to be striden the scheduling degree of freedom of UESS of the carrier wave CC2 of carrier dispatching.

A kind of physical downlink control channel PDCCH signaling method comprises:

Determine the position of first search volume, second search volume and the 3rd search volume of user equipment (UE);

If do not comprise the PDCCH signaling length of carrier wave directive territory CIF in described first search volume, with the PDCCH signaling equal in length that comprises CIF in PDCCH signaling length that does not comprise CIF in the 3rd search volume and described second search volume, and there are the physics overlapping region in described first search volume, second search volume and the 3rd search volume, then in described physics overlapping region, only send and comprise the PDCCH signaling of CIF or only send and do not comprise that the PDCCH signaling of CIF is to described UE.

A kind of physical downlink control channel PDCCH signaling method of reseptance comprises:

If do not comprise the PDCCH signaling length of carrier wave directive territory CIF in described first search volume, with the PDCCH signaling equal in length that comprises CIF in PDCCH signaling length that does not comprise CIF in the 3rd search volume and described second search volume, and there are the physics overlapping region in described first search volume, second search volume and the 3rd search volume, then in described physics overlapping region, receive PDCCH signaling that comprises CIF that the base station sends or the PDCCH signaling that does not comprise CIF;

Described UE is according to the described PDCCH signaling of rule parsing that is provided with.

A kind of base station comprises:

The 6th determination module is used for determining the position of first search volume, second search volume and the 3rd search volume of user equipment (UE);

The 6th sending module, if be used for the PDCCH signaling length that described first search volume does not comprise carrier wave directive territory CIF, with the PDCCH signaling equal in length that comprises CIF in PDCCH signaling length that does not comprise CIF in the 3rd search volume and described second search volume, and there are the physics overlapping region in described first search volume, second search volume and the 3rd search volume, then in described physics overlapping region, only send and comprise the PDCCH signaling of CIF or only send and do not comprise that the PDCCH signaling of CIF is to described UE.

A kind of user equipment (UE) comprises:

The 7th receiver module, if be used for the PDCCH signaling length that described first search volume does not comprise carrier wave directive territory CIF, with the PDCCH signaling equal in length that comprises CIF in PDCCH signaling length that does not comprise CIF in the 3rd search volume and described second search volume, and there are the physics overlapping region in described first search volume, second search volume and the 3rd search volume, then in described physics overlapping region, receive PDCCH signaling that comprises CIF that the base station sends or the PDCCH signaling that does not comprise CIF;

The 7th parsing module is used for described UE according to the described PDCCH signaling of rule parsing that is provided with.

Be illustrated in figure 4 as the flow chart of another embodiment of PDCCH signaling method of the present invention, comprise:

The position of first search volume and second search volume is determined in step 401, base station.

If do not comprise the length of the PDCCH signaling of CIF in step 402 first search volume, equal in length with the PDCCH signaling that comprises CIF in second search volume, there are the physics overlapping region in first search volume and second search volume, then in the physics overlapping region, the base station sends the PDCCH signaling that comprises CIF after having increased a bit to UE at the physics overlapping region.

Among this embodiment, the length that in first search volume, does not comprise the PDCCH signaling of CIF, with the PDCCH signaling equal in length that comprises CIF in second search volume, and first search volume and second search volume exist under the situation of physics overlapping region, require the base station to send the PDCCH signaling that comprises CIF after having increased a bit at the physics overlapping region.Because the PDCCH signaling that comprises CIF that receives of UE Duo a bit than the length of the PDCCH signaling that does not comprise CIF, UE just can determine that signaling length also just can be avoided the parse error of UE than comprising CIF in the PDCCH signaling of growing.

For example, send the RRC connection of receiving the UE feedback after the semi-static RRC signaling be used to notify the current scheduling of resource mode of UE to the base station reshuffles and finishes signaling during this period of time in the base station, and the base station RRC that receives UE feedback connect reshuffle finish signaling after, if be used for carrying the length that the CSS of the current carrier wave of PDCCH signaling does not comprise the PDCCH signaling of the DCI form 0 of CIF or DCI form 1A among the UE, with be used for dispatching the equal in length of PDCCH signaling that the UESS of other bandwidth less than this UE of another carrier wave of current carrier wave comprises the another kind of form of CIF on the current carrier wave, and there are physics overlapping region (only limiting to 4 or 8 these two kinds of CCE ranks) in CSS and UESS, so, the base station sends PDCCH signaling under the CSS pattern that comprises CIF after having increased a bit to UE at the physics overlapping region.Comprise CIF in the PDCCH signaling that UE just can determine to receive like this, avoided the parse error of UE.

Suppose that first search volume is CSS, second search volume is UESS, then adopt the method among the embodiment as shown in Figure 4, bit is filled the length that only can occur in the PDCCH signaling that does not comprise CIF among the CSS, with the PDCCH signaling equal in length that comprises CIF among the UESS, there are the physics overlapping region in CSS and UESS, and be 4 or 8 o'clock only at the CCE grade, and expense is little, can not influence the length of the PDCCH signaling that does not comprise CIF among the CSS yet, can guarantee not comprise among the CSS that the PDCCH signaling of CIF can be compatible mutually with the form of PDCCH signaling in the LTE system.

Because the search volume of different CCE grades can overlap by physics, different CCE grades corresponding again the different rates coupling of chnnel coding, so when the PDCCH signaling length behind the filling bit equals some length-specific, can cause the PDCCH signaling of different CCE grades all to pass through the verification of the C-RNTI of UE, promptly all can be resolved to the PDCCH signaling of oneself by UE, but the PDCCH signaling that the base station sends can only be one of them CCE grade, and therefore the situation of the parsing PDCCH signaling of UE mistake can take place.Therefore, if filled PDCCH signaling length behind the bit in the embodiment of the invention when equaling the above-mentioned PDCCH signaling that causes different CCE grades and all passing through the signaling length of C-RNTI verification of UE, also to recharge a bit and avoid this situation.

Be illustrated in figure 7 as the flow chart of another embodiment of PDCCH signaling method of reseptance of the present invention, comprise:

If do not comprise the PDCCH signaling length of CIF in step 701 first search volume, with the PDCCH signaling equal in length that comprises CIF in second search volume, and there are the physics overlapping region in first search volume and second search volume, then in the physics overlapping region, the PDCCH signaling that comprises CIF after UE has received increase that the base station sends bit.

Step 702, according to this PDCCH signaling of rule parsing that is provided with.

If PDCCH signaling that the base station sends is the PDCCH signaling that comprises CIF that has increased after the bit, after UE receives the PDCCH signaling so, can resolve according to the resolution rules that comprises CIF in the PDCCH signaling and increased a bit.Which type of resolution rules UE specifically adopts, can be good by UE and base station as offered.

In one embodiment, first search volume of user equipment (UE) and the position of second search volume can be determined in the base station, if in described first search volume, do not comprise the length of the PDCCH signaling of carrier wave directive territory CIF, with the equal in length that comprises the PDCCH signaling of CIF in described second search volume, and described first search volume and second search volume exist under the situation of overlapping region, in described overlapping region, after the radio resource control RRC connection reconfiguration that receives described UE transmission is finished signaling, only send the described PDCCH signaling that comprises CIF to described UE;

Described first search volume is common search space CSS, the subscriber equipment particular search space UESS that described second search volume is described UE.

In one embodiment, if do not comprise the length of the PDCCH signaling of CIF in first search volume, equal in length with the PDCCH signaling that comprises CIF in second search volume, and there are the physics overlapping region in first search volume and second search volume, the PDCCH signaling that does not comprise CIF in above-mentioned first search volume is first signaling, the PDCCH signaling that comprises CIF in above-mentioned second search volume is second signaling, then in the physics overlapping region, can distinguish described first signaling and second signaling by absolute position among the PDCCH of described first signaling and second signaling fixing bit or state existing or redundant or that fill.Described absolute position is fixed, and is meant that this field is the field that the precedence among this PDCCH is determined, such as being last bit except the CRC bit.

Specifically with in the FDD system, the up-downgoing carrier bandwidths equates that DCI form 0 and the 1A under the scene is example, last bit except the CRC bit of DCI form 1A is a bit of power command field, last bit except the CRC bit of DCI form 0 is a filling bit, is defaulted as filling " 0 ".In the time of can stipulating described last bit for " 0 ", representing this PDCCH is described first signaling, and during for " 1 ", representing this PDCCH is described second signaling.And if described last bit had certain indication implication originally, promptly this bit is nonredundancy or filling bit or state, then can limit the parsing of this field, the implication of perhaps representing this bit by other field among the PDCCH is such as exchanging implication with the power control field among the PDCCH of dispatching downlink data.

In one embodiment, support in the system of carrier aggregation, upstream control signaling (comprises uplink ACK/NACK, up channel state information etc.) all be on a specific up-link carrier of UE, to feed back, this up-link carrier is called up main carrier, the descending carrier paired with it is called downlink main carrier to carry, and other descending carrier of this UE is called descending non-main carrier.A kind of method of the power control of ascending control channel is to control by the power control command word section of two bits of the PDCCH that is used for the dispatching downlink data, because the ascending control channel of all descending carriers of corresponding certain UE all only feeds back on up main carrier, therefore the power control that only needs power control command word section among the PDCCH of dispatching downlink main carrier to do ascending control channel gets final product, power control command word section among the PDCCH of the non-main carrier of dispatching downlink is just redundant, then can be so that this redundant field is represented the implication that the fixing field itself in absolute position of described first signaling of above-mentioned differentiation and second signaling is had, UE can distinguish above-mentioned first signaling and second signaling by the fixing field in this absolute position, and can obtain the implication that the fixing field in this absolute position will be represented by resolving this redundant field.

Be illustrated in figure 8 as the structural representation of an embodiment of base station of the present invention, this base station 1 comprises: first determination module 11 and first sending module 12.Wherein, first determination module 11 is used for determining the position of first search volume and second search volume.First sending module 12, be used for not comprising the PDCCH signaling length of CIF in first search volume, with the PDCCH signaling equal in length that comprises CIF in second search volume, and first search volume and second search volume exist under the situation of physics overlapping region, in the physics overlapping region, only send the described PDCCH signaling of CIF that do not comprise to UE, perhaps, if a PDCCH signaling is the PDCCH signaling that does not comprise CIF in first search volume, the 2nd PDCCH signaling is the PDCCH signaling that comprises CIF in second search volume, and then sending has increased the bit PDCCH signaling that comprises CIF afterwards to UE.Perhaps, send the RRC signaling in the time interval of the affirmation signaling that receives the UE feedback in the base station, the base station sends the PDCCH signaling of other kinds except a PDCCH signaling and the 2nd PDCCH signaling to UE; The base station receives after configure-ack that UE returns finishes signaling, the base station only send comprise CIF the PDCCH signaling to UE.

In one embodiment, a kind of base station can comprise:

Above-mentioned first search volume is common search space CSS, the subscriber equipment particular search space UESS that described second search volume is described UE.

Be illustrated in figure 9 as the structural representation of another embodiment of base station of the present invention, this base station 1 comprises: second determination module 13 and second sending module 14.Wherein, second determination module 13 is used for determining the position of first search volume and second search volume.Second sending module 14, determine the position of first search volume of described UE and second search volume at described second determination module after, if the length of the PDCCH signaling in described first search volume, equal in length with the 2nd PDCCH signaling in described second search volume, a described PDCCH signaling is not for comprising the PDCCH signaling of carrier wave directive territory CIF, described the 2nd PDCCH signaling is the PDCCH signaling that comprises CIF, and there are the physics overlapping region in described first search volume and second search volume, then in described physics overlapping region, reshuffling in the time interval of finishing signaling to the RRC connection that receives described UE feedback to described UE transmission radio resource control RRC signaling, send the 3rd PDCCH signaling or the 4th PDCCH signaling to described UE, described the 3rd PDCCH signaling is not for comprising the PDCCH signaling of CIF, described the 4th PDCCH signaling is the PDCCH signaling that comprises CIF, and the signaling length of the signaling length of described the 3rd PDCCH signaling and described the 4th PDCCH signaling is unequal, the length of described the 3rd PDCCH signaling is different from the length of a described PDCCH signaling, and the length of described the 4th PDCCH signaling is different from the length of a described PDCCH signaling.

Among the embodiment shown in Figure 9, first search volume and second search volume comprise two UESS of the different members carrier wave that is used to dispatch UE.

Be the structural representation of UE embodiment of the present invention as shown in figure 10, this UE2 comprises receiver module 21 and parsing module 22.Receiver module 21, be used for not comprising the PDCCH signaling length of CIF in first search volume, with the PDCCH signaling equal in length that comprises CIF in second search volume, and first search volume and second search volume exist under the situation of physics overlapping region, in the physics overlapping region, receive the PDCCH signaling that does not comprise CIF that the base station sends, perhaps, the PDCCH signaling that comprises CIF after received increase that the base station sends bit.Parsing module 22 only is used for resolving the PDCCH signaling that receiver module 21 receives according to the resolution rules to the PDCCH signaling that do not comprise CIF that is provided with.Perhaps, after UE correctly resolved the RRC signaling, UE received only the PDCCH signaling that comprises CIF that above-mentioned base station sends.

In one embodiment, user equipment (UE) can also comprise:

Second receiver module, be used for not comprising the length of the PDCCH signaling of carrier wave directive territory CIF in first search volume of described UE, with the equal in length that comprises the PDCCH signaling of CIF in second search volume of described UE, and described first search volume and second search volume exist under the situation of physics overlapping region, in described physics overlapping region, after correctly having resolved the radio resource control RRC signaling that comes from the base station at described UE, receive the described PDCCH signaling that comprises CIF;

The embodiment of the invention also provides a kind of communication system, can comprise as shown in Figure 8 the base station and UE as shown in figure 10, the base station adopts as described above the method described in the method embodiment to send the PDCCH signaling to UE, and UE adopts as described above that the method described in the method embodiment receives the PDCCH signaling that the base station sends.

The present invention also provides a kind of communication system, can comprise UE and UE as shown in Figure 9, and the base station adopts as described above the method described in the method embodiment to send the PDCCH signaling to UE, and UE can receive the PDCCH signaling that the base station sends according to existing method.

Base station that the embodiment of the invention provides and UE, if do not comprise the length of the PDCCH signaling of CIF in first search volume, with the PDCCH signaling equal in length that comprises CIF in second search volume, there are the physics overlapping region in first search volume and second search volume, then limit the base station and do not comprise that in the transmission of physics overlapping region the PDCCH signaling of CIF is to UE.

Perhaps, send the RRC signaling in the time interval of the affirmation signaling that receives the UE feedback in the base station, the base station sends the PDCCH signaling of other kinds except a PDCCH signaling and the 2nd PDCCH signaling to UE; The base station receives after configure-ack that UE returns finishes signaling, and the base station sends and comprises that the PDCCH signaling of CIF is to UE.

Perhaps, if do not comprise the length of signaling of the PDCCH signaling of CIF in first search volume, equal in length with the signaling of the 2nd PDCCH signaling that comprises CIF in second search volume, and there are the physics overlapping region in first search volume and second search volume, then in the physics overlapping region, send semi-static RRC signaling reshuffles in the time interval of finishing signaling to the RRC connection that receives the UE feedback in the base station, the base station sends the PDCCH signaling of other kinds except a PDCCH signaling and the 2nd PDCCH signaling to UE, so just can avoid the scheduling of base station fuzzy, thereby avoid the parse error of UE.

In one embodiment, the position of first search volume and second search volume is determined in the base station, if do not comprise the length of the PDCCH signaling of CIF in first search volume, with the PDCCH signaling equal in length that comprises CIF in second search volume, there are the physics overlapping region in first search volume and second search volume, then in the physics overlapping region, the base station sends and comprises that the PDCCH signaling of CIF is to UE.

If do not comprise the length of the PDCCH signaling of CIF in first search volume, with the PDCCH signaling equal in length that comprises CIF in second search volume, and there are the physics overlapping region in first search volume and second search volume, then in the physics overlapping region, UE receives the PDCCH signaling that comprises CIF that the base station sends, according to the rule parsing PDCCH signaling that is provided with.

In the above embodiments, the length that in first search volume, does not comprise the PDCCH signaling of CIF, with the PDCCH signaling equal in length that comprises CIF in second search volume, and first search volume and second search volume exist under the situation of physics overlapping region, require the base station to send and comprise that the PDCCH signaling of CIF is to UE, like this, what send to UE is the PDCCH signaling that comprises CIF all the time, UE just can determine that the PDCCH signaling that receives at overlapping region must comprise CIF, the resource of distributing in the PDCCH signaling also determines to be used to carry the resource on the carrier wave of this PDCCH signaling, also just can not cause the UE parse error.

For example, send in the base station after the semi-static RRC signaling be used to notify the current scheduling of resource mode of UE and to receive that to the base station configure-ack that UE returns finishes signaling during this period of time, and the base station receives after configure-ack that UE returns finishes signaling, if be used for carrying the length that the CSS of the current carrier wave of PDCCH signaling does not comprise the PDCCH signaling of the DCI form 0 of CIF or DCI form 1A among the UE, with be used for dispatching the equal in length of PDCCH signaling that the UESS of other bandwidth less than this UE of another carrier wave of current carrier wave comprises the another kind of form of CIF on the current carrier wave, and there are the physics overlapping region in CSS and UESS, so, the base station sends at the physics overlapping region and comprises the PDCCH signaling of CIF, and carries the resource allocation information at UE in this signaling.In one embodiment, UE can be good with the base station as offered, includes CIF in the PDCCH signaling that sends in the physics overlapping region.So, UE just can determine that this PDCCH signaling must comprise CIF after receiving the PDCCH signaling, can determine that according to the CIF in this PDCCH signaling the resource of distributing is the resource on which carrier wave, also just can not cause the UE parse error.

First search volume can be CSS, and second search volume is the particular UE SS of UE, and the CCE grade of first search volume and second search volume is 4 or 8.Perhaps, first search volume and second search volume comprise two UESS of the different members carrier wave that is used to dispatch UE.

In one embodiment, provide a kind of base station, this base station comprises:

The 4th determination module is used for determining first search volume of user equipment (UE) and the position of second search volume;

The 4th sending module, be used for after described first determination module is determined the position of first search volume of UE and second search volume, the PDCCH signaling length that in described first search volume, does not comprise carrier wave directive territory CIF, with the PDCCH signaling equal in length that comprises CIF in described second search volume, and described first search volume and second search volume exist under the situation of physics overlapping region, in described physics overlapping region, send the PDCCH signaling that comprises CIF and do not comprise that to described UE or transmission the PDCCH signaling of CIF is to described UE.

In one embodiment, provide a kind of user equipment (UE), comprising:

The 4th receiver module, be used for not comprising the PDCCH signaling length of carrier wave directive territory CIF in first search volume, with the PDCCH signaling equal in length that comprises CIF in second search volume, and described first search volume and second search volume exist under the situation of physics overlapping region, in described physics overlapping region, receive the PDCCH signaling that comprises CIF of base station transmission or receive the PDCCH signaling that does not comprise CIF that the base station sends;

The 4th parsing module is used for the PDCCH signaling that receives according to the described receiver module of rule parsing that is provided with.

One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.

It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.

Claims

1. a physical downlink control channel PDCCH signaling method is characterized in that, comprising:

Determine first search volume of user equipment (UE) and the position of second search volume;

2. method according to claim 1 is characterized in that, described first search volume is common search space CSS, the subscriber equipment particular search space UESS that described second search volume is described UE.

3. method according to claim 2 is characterized in that, the control channel unit CCE grade of the PDCCH signaling of transmitting in described first search volume and described second search volume is 4 or 8.

4. method according to claim 1 is characterized in that, described first search volume and described second search volume comprise two UESS of the different members carrier wave that is used to dispatch described UE.

5. a physical downlink control channel PDCCH signaling method is characterized in that, comprising:

6. method according to claim 5 is characterized in that,

7. a physical downlink control channel PDCCH signaling method is characterized in that, comprising:

8. method according to claim 7 is characterized in that, described first search volume and described second search volume comprise two subscriber equipment particular search space UESS of the different members carrier wave that is used to dispatch described UE.

9. a physical downlink control channel PDCCH signaling method of reseptance is characterized in that, comprising:

10. method according to claim 9 is characterized in that, described first search volume is common search space CSS, the subscriber equipment particular search space UESS that described second search volume is a user equipment (UE).

11. a physical downlink control channel PDCCH signaling method of reseptance is characterized in that, comprising:

12. a base station is characterized in that, comprising:

First determination module is used for determining first search volume of user equipment (UE) and the position of second search volume;

First sending module, be used for after described first determination module is determined the position of first search volume of UE and second search volume, the PDCCH signaling length that in described first search volume, does not comprise carrier wave directive territory CIF, with the PDCCH signaling equal in length that comprises CIF in described second search volume, and described first search volume and second search volume exist under the situation of physics overlapping region, in described physics overlapping region, only send the described PDCCH signaling of CIF that do not comprise to described UE.

13. a base station is characterized in that, comprising:

Second sending module, be used for after described second determination module is determined the position of first search volume of described UE and second search volume, if the length of the PDCCH signaling in described first search volume, equal in length with the 2nd PDCCH signaling in described second search volume, a described PDCCH signaling is not for comprising the PDCCH signaling of carrier wave directive territory CIF, described the 2nd PDCCH signaling is the PDCCH signaling that comprises CIF, and there are the physics overlapping region in described first search volume and second search volume, then in described physics overlapping region, reshuffling in the time interval of finishing signaling to the RRC connection that receives described UE feedback to described UE transmission radio resource control RRC signaling, send the 3rd PDCCH signaling or the 4th PDCCH signaling to described UE, described the 3rd PDCCH signaling is not for comprising the PDCCH signaling of CIF, described the 4th PDCCH signaling is the PDCCH signaling that comprises CIF, and the signaling length of the signaling length of described the 3rd PDCCH signaling and described the 4th PDCCH signaling is unequal, the length of described the 3rd PDCCH signaling is different from the length of a described PDCCH signaling, and the length of described the 4th PDCCH signaling is different from the length of a described PDCCH signaling.

14. a base station is characterized in that, comprising:

15. a user equipment (UE) is characterized in that, comprising:

Receiver module, be used for not comprising the PDCCH signaling length of carrier wave directive territory CIF in first search volume, with the PDCCH signaling equal in length that comprises CIF in second search volume, and described first search volume and second search volume exist under the situation of physics overlapping region, in described physics overlapping region, receive the PDCCH signaling that does not comprise CIF that the base station sends;

16. a user equipment (UE) is characterized in that, comprising:

17. a communication system comprises the described user equipment (UE) of base station as claimed in claim 12 and claim 15.

18. a communication system comprises user equipment (UE) and base station as claimed in claim 13.

19. a physical downlink control channel PDCCH signaling method is characterized in that, comprising:

If do not comprise the PDCCH signaling length of carrier wave directive territory CIF in described first search volume, with the PDCCH signaling equal in length that comprises CIF in described second search volume, and there are the physics overlapping region in described first search volume and second search volume, then in described physics overlapping region, only transmission comprises that the PDCCH signaling of CIF is to described UE.

20. a physical downlink control channel PDCCH signaling method is characterized in that, comprising:

If do not comprise the PDCCH signaling length of carrier wave directive territory CIF in first search volume, with the PDCCH signaling equal in length that comprises CIF in second search volume, and there are the physics overlapping region in described first search volume and described second search volume, then in described physics overlapping region, receive the PDCCH signaling that includes only CIF that the base station sends;

According to the described PDCCH signaling of rule parsing that is provided with.

21. a base station is characterized in that, comprising: