WO2014071611A1

WO2014071611A1 - Transmission method and device for downlink control channel

Info

Publication number: WO2014071611A1
Application number: PCT/CN2012/084389
Authority: WO
Inventors: 周永行; 成艳
Original assignee: 华为技术有限公司
Priority date: 2012-11-09
Filing date: 2012-11-09
Publication date: 2014-05-15
Also published as: CN104756413B; CN104756413A

Abstract

Provided are a transmission method and device for a downlink control channel.The method comprises: receiving information for indicating a physical resource block set bearing an enhanced physical downlink control channel, and receiving the enhanced physical downlink control channel according to the information for indicating the physical resource block set bearing the enhanced physical downlink control channel, according to the information for indicating the physical resource block set bearing the enhanced physical downlink control channel, determining a carrier corresponding to the received enhanced physical downlink control channel, and receiving a physical downlink shared channel over the determined carrier according to the received EPDCCH, or sending a physical uplink shared channel over the determined carrier according to the received EPDCCH.Thus the performance of an EPDCCH can be improved in the case of limited resources.

Description

Transmission method and device for downlink control channel

Embodiments of the present invention relate to the field of communications technologies, and, more particularly, to a method and apparatus for transmitting a downlink control channel. Background technique

In the evolved LTE system (LTE-A), a carrier aggregation (CA) technology, also called Spectrum Aggregation technology or Bandwidth Extension technology, is introduced. In carrier aggregation, the frequency of two or more component carriers are aggregated together to obtain a wider transmission bandwidth. In a carrier aggregation system, resources of multiple component carriers (CCs) can be simultaneously scheduled for use by one UE to meet higher peak rates and service requirements. In the CA, there are two schemes for the transmission of the PDCCH. One scheme is called Same-CC Scheduling (SCS), that is, the control channel on a certain carrier can only schedule the carrier or the uplink carrier corresponding to the carrier. Another scheme is called Cross-CC Scheduling (CCS), that is, the control channel on a certain carrier can schedule data of the carrier or other carriers. For cross-carrier scheduling, a carrier indicator field (CIF) is added to the DCI corresponding to the PDCCH to specifically indicate which carrier on the current PDCCH is scheduled for data transmission. Currently, a 3-bit CIF is used. Due to carrier aggregation, the channel conditions and load of different carriers may be inconsistent. Cross-carrier scheduling can improve the transmission performance of the control channel on the one hand, and dynamically balance the load of each carrier on the other hand. In the carrier aggregation scenario, the support for the enhanced physical downlink control channel (EPDCCH) cross-carrier scheduling capability supports the PDCCH cross-carrier scheduling mechanism from the perspective of backward compatibility, that is, adding a 3-bit CIF domain indication scheduling in the DCI corresponding to the EPDCCH. Which carrier is transmitting data. However, the solution has the following problems: Adding a 3-bit CIF field to the DCI increases the DCI payload, thereby reducing the performance of the EPDCCH under limited resources. Summary of the invention

The embodiments of the present invention provide a method and an apparatus for transmitting a downlink control channel, which can improve the performance of the EPDCCH under limited resources.

According to an aspect of the present invention, a method for transmitting a downlink control channel includes: receiving information indicating a physical resource block set carrying an enhanced physical downlink control channel, and according to the physical downlink control used to indicate bearer enhancement The information of the physical resource block set of the channel receives the enhanced physical downlink control channel;

Determining, according to the information indicating the physical resource block set carrying the enhanced physical downlink control channel, the received carrier corresponding to the enhanced physical downlink control channel;

Receiving, by the received EPDCCH, a physical downlink shared channel on the determined carrier or transmitting a physical uplink shared channel on the determined carrier according to the received EPDCCH.

According to the first executable mode of the first aspect of the present disclosure, the information indicating the physical resource block set carrying the enhanced physical downlink control channel includes information indicating a carrier corresponding to the physical resource block set carrying the enhanced physical downlink control channel;

Determining the received carrier corresponding to the enhanced physical downlink control channel according to the information of the physical resource block set for indicating the enhanced physical downlink control channel, including:

And determining the received carrier corresponding to the enhanced physical downlink control channel according to the information of the carrier corresponding to the physical resource block set indicating the enhanced physical downlink control channel. .

According to a second executable manner of an aspect of the present invention, the information indicating the physical resource block set carrying the enhanced physical downlink control channel is carried on the enhanced physical downlink control channel.

EPDCCH configuration information, or carrier indication field CIF configuration information.

According to a third executable mode of an aspect of the present invention, the physical resource block set is a physics of at least two enhanced physical downlink control channels included on a carrier where the physical resource block set of the enhanced physical downlink control channel is located One of the resource block sets, the at least two physical resource block sets correspond to at least two different enhanced physical downlink control channels, and the at least two different enhanced physical downlink control channel scheduling carriers are different.

According to the fourth executable mode of an aspect of the present invention, before determining the carrier corresponding to the received enhanced physical downlink control channel according to the information indicating the physical resource block set of the physical downlink control channel that carries the enhanced, the method further includes : The user equipment determines that the carrier indication domain CIF is not configured. According to another aspect of the present invention, a method for transmitting a downlink control channel includes: transmitting, to a user equipment, information indicating a physical resource block set carrying an enhanced physical downlink control channel;

Determining, by the user equipment, a carrier that needs to be scheduled, and determining, according to the carrier, a physical resource block set that carries an enhanced physical downlink control channel corresponding to the carrier;

Sending, by the physical resource included in the physical resource block set, the enhanced physical downlink control channel to the user equipment, so that the user equipment determines to receive according to the physical resource block set of the physical downlink control channel that is enhanced by the bearer. And the carrier corresponding to the enhanced physical downlink control channel;

Determining, according to the set of physical resource blocks, a carrier corresponding to the enhanced physical downlink control channel;

Transmitting, by the carrier corresponding to the enhanced physical downlink control channel, the physical downlink shared channel corresponding to the enhanced physical downlink control channel to the user equipment, or receiving the foregoing on a carrier corresponding to the enhanced physical downlink control channel A physical uplink shared channel corresponding to the enhanced physical downlink control channel sent by the user equipment.

According to a first implementation manner of another aspect of the present disclosure, the information indicating the physical resource block set carrying the enhanced physical downlink control channel includes information indicating a carrier corresponding to the physical resource block set carrying the enhanced physical downlink control channel. ;

Determining, by the user equipment, the received carrier corresponding to the enhanced physical downlink control channel according to the physical resource block set of the physical downlink control channel that is enhanced by the bearer, including:

Determining, by the user equipment, the received physical downlink according to the physical resource block set of the physical downlink control channel that is enhanced by the bearer, and the information of the carrier corresponding to the physical resource block set indicating the enhanced physical downlink control channel of the bearer. The carrier corresponding to the control channel.

According to a second executable manner of another aspect of the present invention, the information indicating the physical resource block set carrying the enhanced physical downlink control channel is included in the enhanced physical downlink control channel.

In the configuration information of the EPDCCH, or the carrier indicates the domain CIF configuration information.

According to a third executable mode of another aspect of the present invention, the physical resource block set is at least two bearer enhanced physical downlink control channels included on a carrier where the physical resource block set of the enhanced physical downlink control channel is located One of the physical resource block sets, the at least two physical resource block sets correspond to at least two different enhanced physical downlink control channels, and the at least two different enhanced physical downlink control channel scheduling carriers are different.

According to a fourth executable manner of another aspect of the present invention, the determining the location according to the carrier Determining, by the carrier, the enhancement of the corresponding carrier of the carrier, according to the carrier, and the corresponding relationship between the physical resource set and the carrier, A collection of physical resource blocks of a physical downlink control channel.

According to a fifth executable mode of another aspect of the present invention, the determining, by the user equipment, the scheduled carrier, and determining, according to the carrier, the physical resource block set that carries the enhanced physical downlink control channel corresponding to the carrier, The method further includes: determining that the user equipment is not configured with a carrier indication domain CIF.

According to still another aspect of the present invention, an apparatus for transmitting a downlink control channel includes: a transceiver module, configured to receive information indicating a physical resource block set carrying an enhanced physical downlink control channel, and according to the use Receiving an enhanced physical downlink control channel for information indicating a set of physical resource blocks carrying the enhanced physical downlink control channel;

a determining module, configured to determine, according to the information indicating a physical resource block set that carries the enhanced physical downlink control channel, a carrier corresponding to the enhanced physical downlink control channel, where the transceiver module is further configured to The received EPDCCH receives a physical downlink shared channel on the determined carrier or transmits a physical uplink shared channel on the determined carrier according to the received EPDCCH.

According to the first executable mode of the other aspect of the present invention, the information indicating the physical resource block set carrying the enhanced physical downlink control channel carries the information of the carrier corresponding to the physical resource block set of the enhanced physical downlink control channel;

The determining module is specifically configured to determine, according to the information about the carrier corresponding to the physical resource block set indicating the enhanced physical downlink control channel, the received carrier corresponding to the enhanced physical downlink control channel.

According to the second executable mode of the other aspect of the present invention, the information indicating the physical resource block set carrying the enhanced physical downlink control channel includes the configuration information of the enhanced physical downlink control channel EPDCCH, or the carrier indication domain CIF configuration. Information.

According to the third executable mode of the other aspect of the present invention, the physical resource block set is at least two bearer enhanced physical downlink control channels included on a carrier where the physical resource block set of the enhanced physical downlink control channel is located One of the physical resource block sets, the at least two physical resource block sets correspond to at least two different enhanced physical downlink control channels, and the at least two different enhanced physical downlink control channel scheduling carriers are different.

According to the fourth executable mode of the other aspect of the present invention, the determining module is specifically configured to determine that the user equipment is not configured with the carrier indication domain CIF. According to still another aspect of the present invention, an apparatus for transmitting a downlink control channel includes: a transceiver module, configured to send, to a user equipment, information indicating a physical resource block set carrying an enhanced physical downlink control channel;

a determining module, configured to determine a carrier that the user equipment needs to be scheduled, and determine, according to the carrier, a physical resource block set that carries the enhanced physical downlink control channel corresponding to the carrier;

The transceiver module is further configured to send the enhanced physical downlink control channel by using the physical resource included in the physical resource block set, so that the user equipment is configured according to the physical resource block of the enhanced physical downlink control channel of the bearer. The set determines the carrier corresponding to the received enhanced physical downlink control channel;

The transceiver module is further configured to send, by using a carrier corresponding to the enhanced physical downlink control channel, a physical downlink shared channel corresponding to the enhanced physical downlink control channel to the user equipment, or a transceiver module, where And receiving, by the carrier corresponding to the enhanced physical downlink control channel, a physical uplink shared channel corresponding to the enhanced physical downlink control channel sent by the user equipment.

According to the first executable mode of the further aspect of the present invention, the information indicating the physical resource block set carrying the enhanced physical downlink control channel includes information indicating a carrier corresponding to the physical resource block set carrying the enhanced physical downlink control channel. .

According to a second executable manner of still another aspect of the present invention, the information indicating a physical resource block set carrying the enhanced physical downlink control channel is included in the enhanced physical downlink control channel.

According to the third executable mode of the further aspect of the present invention, the physical resource block set is at least two bearer enhanced physical downlink control channels included on a carrier where the physical resource block set of the enhanced physical downlink control channel is located One of the physical resource block sets, the at least two physical resource block sets correspond to at least two different enhanced physical downlink control channels, and the at least two different enhanced physical downlink control channel scheduling carriers are different.

According to the fourth executable mode of the further aspect of the present invention, the determining module is specifically configured to determine, according to the carrier, a correspondence between the physical resource set and the carrier, A set of physical resource blocks of the enhanced physical downlink control channel.

According to a fifth executable mode of still another aspect of the present invention, the determining module is specifically configured to determine that the user equipment is not configured with a carrier indication field CIF.

According to still another aspect of the present invention, an apparatus for transmitting a downlink control channel, includes: a receiver, configured to receive information indicating a physical resource block set carrying an enhanced physical downlink control channel, and according to the use Physical resources indicating the physical downlink control channel carrying the enhanced The information of the block set receives the enhanced physical downlink control channel;

a processor, configured to determine, according to the information indicating a physical resource block set that carries the enhanced physical downlink control channel, a received carrier corresponding to the enhanced physical downlink control channel; Receiving the received EPDCCH to receive a physical downlink shared channel on the determined carrier, or

And a transmitter, configured to send, according to the received EPDCCH, a physical uplink shared channel on the determined carrier.

According to still another aspect of the present invention, an apparatus for transmitting a downlink control channel includes: a transmitter, configured to send, to a user equipment, information indicating a physical resource block set carrying an enhanced physical downlink control channel;

The processor determines a carrier that the user equipment needs to schedule, and determines, according to the carrier, a physical resource block set that carries the enhanced physical downlink control channel corresponding to the carrier;

The transmitter is further configured to send, by using the physical resource included in the physical resource block set, the enhanced physical downlink control channel to the user equipment, so that the user equipment is enhanced according to the physical downlink control of the bearer. The set of physical resource blocks of the channel determines the carrier corresponding to the received enhanced physical downlink control channel;

The transmitter is further configured to send, by using a carrier corresponding to the enhanced physical downlink control channel, a physical downlink shared channel corresponding to the enhanced physical downlink control channel to the user equipment, or a receiver, used in the The physical uplink shared channel corresponding to the enhanced physical downlink control channel sent by the user equipment is received on a carrier corresponding to the enhanced physical downlink control channel.

In the foregoing technical solution, by determining the received carrier corresponding to the enhanced physical downlink control channel, and receiving the physical downlink shared channel or transmitting the physical uplink shared channel on the determined carrier according to the received EPDCCH, The performance of the EPDCCH is improved under limited resources. DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description are only some of the present invention. For the embodiments, those skilled in the art can obtain other drawings according to the drawings without any creative work.

1 is a schematic diagram of a transmission method of a downlink control channel according to an embodiment of the present invention. Cheng Tu

2 is a schematic flow diagram of a method for transmitting a downlink control channel according to another embodiment of the present invention;

3 is a schematic structural view of a device according to another embodiment of the present invention;

4 is a schematic structural view of a device according to another embodiment of the present invention;

Figure 5 is a schematic structural view of a device according to another embodiment of the present invention;

Figure 6 is a block diagram showing the structure of a device in accordance with another embodiment of the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without making creative labor are within the scope of the present invention.

It should be understood that the technical solution of the present invention can be applied to various communication systems, for example, a Global System of Mobile Communication (GSM) system, a Code Division Multiple Access (CDMA) system, and a wideband code division. WCDMA (Wandaband Code Division Multiple Access) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) System, Universal Mobile Telecommunication System (UMTS), etc. The embodiment of the present invention will be described by taking an LTE network and/or an LTE-A network as an example, but the embodiment of the present invention is not limited thereto.

It should be understood that a User Equipment (UE), which may also be called a Mobile Terminal, a mobile user equipment, etc., may be connected to one or more cores via a radio access network (eg, RAN, Radio Access Network). The network communicates, and the user equipment can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, for example, a mobile device that can be portable, pocket, handheld, computer built, or in-vehicle. They exchange language and/or data with the radio access network.

It should also be understood that the base station may be a base station (BTS, Base Transceiver Station) in GSM or CDMA, or a base station (NodeB) in WCDMA, or may be an evolved base in LTE. The present invention is not limited to the eNB or e-NodeB (evolutional Node B), but for convenience of description, the following embodiments are described by taking an eNB as an example.

In an LTE system, a base station (eNB) and a user equipment (UE) perform communication and data transmission on one carrier. The minimum time unit for eNB scheduling is one subframe, the length is one millisecond, and is scheduled.

The UE generally includes its own physical downlink control channel (PDCCH) in each subframe, and carries time-frequency resource allocation information indicating a physical data channel (which may be uplink or downlink), and the UE follows the PDCCH in the search space of the PDCCH. After the PDCCH is demodulated and decoded by the signaling length and the CCE level, the PDCCH is descrambled by its own RNTI to verify and determine its own PDCCH, and its data channel is further processed accordingly. The so-called search space is a piece of resources defined according to the Control Channel Element (CCE).

In the evolved LTE system (LTE-A), Carrier Aggregation (CA) technology, also known as Spectrum Aggregation technology or Bandwidth Extension technology, is introduced. In carrier aggregation, the frequency of two or more Component Carriers are aggregated together to obtain a wider transmission bandwidth. In a carrier aggregation system, resources of multiple component carriers (CCs) can be simultaneously scheduled for use by one UE to meet higher peak rates and service requirements. Under CA, there are two schemes for PDCCH transmission (see Figure 1). One scheme is called Same-CC Scheduling (SCS), that is, the control channel on a certain carrier can only schedule the carrier or Carrier-corresponding uplink carrier data; another scheme is called cross-carrier scheduling

(Cross-CC Scheduling, CCS), that is, the control channel on a certain carrier can schedule data of the carrier or other carrier. For cross-carrier scheduling, a carrier indicator field (CIF) is added to the DCI corresponding to the PDCCH to specifically indicate which carrier is scheduled for data transmission on the current PDCCH. Currently, a 3-bit CIF is used. In particular, the multi-user common PDCCH can be coexisted with the LTE UE without CIF. Due to carrier aggregation, the channel conditions and load of different carriers may be inconsistent. Cross-carrier scheduling can improve the transmission performance of the control channel on the one hand, and dynamically balance the load of each carrier on the other hand.

An enhanced control channel (EPDCCH) is introduced in the LTE communication system. For EPDCCH, The network side configures K physical resource block sets for each user, where K is a positive integer greater than or equal to 1. Each resource block set set includes at least one physical resource block PRB pair (for example, it may be 2 PRB pairs or 4 PRB pair or 8 PRB pairs), K physical resource block sets serve as the search space for the user's enhanced control channel.

Assume that the user configures 3 sets, and each set contains 4 PRBs. For example, setl contains PRB pair as PRB pairl, 4, 7, 10; set2 contains PRB pair 2, 5, 8, 11; set3 Contains PRB pair 3, 6, 9, 12. Currently, each system can be configured with a maximum of 2 physical resource block sets.

A step 101 of the embodiment of the present invention is described in detail below with reference to FIG. 1, the user equipment receives information indicating a physical resource block set carrying an enhanced physical downlink control channel, and according to the physical downlink control used to indicate bearer enhancement. The information of the physical resource block set of the channel receives the enhanced physical downlink control channel;

In this step, the user equipment may determine, according to the information of the physical resource block set that carries the enhanced physical downlink control channel, the number of physical resource block sets transmitted on the downlink carrier, and/or the PRB pair included in the at least one physical resource block set. The information indicating the physical physical control block set of the enhanced physical downlink control channel may also include information indicating a carrier corresponding to the enhanced physical downlink control channel physical resource block set. The carrier corresponding to the set of physical resource blocks, that is, the carrier corresponding to the enhanced physical downlink control channel received in the set of physical resource blocks. If the corresponding carrier is a downlink carrier, the EPDCCH schedules a PDSCH on the downlink carrier; if the corresponding carrier is an uplink carrier, the EPDCCH schedules PUSCH transmission on the uplink carrier.

It should be noted that the information indicating the physical resource block set carrying the enhanced physical downlink control channel may correspond to one configuration carrier, that is, the information of the physical resource block set carrying the enhanced physical downlink control channel on one carrier, when the user equipment When at least two carriers are configured, the user equipment needs to receive at least two pieces of physical resource block sets indicating the enhanced physical downlink control channel, and each piece of information corresponds to one configured carrier. One of the steps indicates that the information of the physical resource block set carrying the enhanced physical downlink control channel may also correspond to all configured carriers. In this case, the different parts of the information indicate the bearer enhanced physical downlink control channel on different configured carriers. Information about the collection of physical resource blocks. In this step, the user equipment determines, according to the information indicating the physical resource block set carrying the enhanced physical downlink control channel, the bearer enhancement on each configured carrier. The information of the physical resource block set of the physical downlink control channel.

When it is determined that there are at least two physical resource block sets on one carrier according to information indicating a physical resource block set of the physical downlink control channel, at least two physical resource block sets correspond to different carriers; or, when the user equipment is not present When the CIF is configured, when it is determined that there are at least two physical resource block sets on one carrier according to the information indicating the physical resource block set of the physical downlink control channel, the carrier corresponding to at least two physical resource block sets is different.

In this step, the user equipment may determine the location of the PRB pair included in the physical resource block set according to the information indicating the physical downlink control channel physical resource block set, so as to detect the EPDCCH in the corresponding PRB pair position.

Step 102: The user equipment determines the received carrier wave corresponding to the enhanced physical downlink control channel.

If the information indicating the physical resource block set carrying the enhanced physical downlink control channel in step 101 includes the information indicating the carrier corresponding to the enhanced physical downlink control channel physical resource block set, the physical downlink control of the user equipment according to the indication is enhanced in this step. The information of the carrier corresponding to the set of channel physical resource blocks determines the carrier corresponding to the received enhanced physical downlink control channel. Specifically, the user equipment determines, according to the information about the physical resource block set that indicates the enhanced physical downlink control channel, the physical resource block set of the enhanced physical downlink control channel on each configured carrier, and the enhanced physical according to the indication. The information of the carrier corresponding to the set of physical resource blocks of the downlink control channel determines the carrier corresponding to each physical resource block set on each configured carrier, so as to determine the received carrier corresponding to the enhanced physical downlink control channel.

In this step, the user equipment can also be performed as follows:

Manner 1: The user equipment determines, according to the information indicating the carrier corresponding to the enhanced physical downlink control channel physical resource block set, the carrier corresponding to the received enhanced physical downlink control channel;

Manner 2: When the user equipment is not configured with the CIF, the user equipment determines, according to the information of the carrier corresponding to the enhanced physical downlink control channel physical resource block set, the carrier corresponding to the received enhanced physical downlink control channel; or when the user equipment does not have When the CIF is configured, the user equipment determines, according to the information indicating the physical resource block set carrying the enhanced physical downlink control channel, the carrier corresponding to the received enhanced physical downlink control channel;

In mode 2, when the user equipment is not configured with the CIF, the physical downlink control channel is indicated according to the indication. The information corresponding to the carrier of the physical resource block set determines the carrier corresponding to the received enhanced physical downlink control channel, or determines the received enhanced physical downlink control channel according to the information of the physical resource block set indicating the enhanced physical downlink control channel of the bearer. Carrier. If the user equipment is configured with CIF, wave.

In this step, if the information indicating the physical resource block set carrying the enhanced physical downlink control channel in step 101 does not include the information indicating the carrier corresponding to the enhanced physical downlink control channel physical resource block set, the information may be as follows:

Manner 1: The user equipment determines, according to a predetermined correspondence between the set of physical resource blocks and the carrier, the carrier corresponding to the received enhanced physical downlink control channel, where the correspondence between the predetermined physical resource block set and the carrier may be the first physical resource block. The set corresponds to the first carrier, and the second set of physical resource blocks corresponds to the second carrier;

In this manner, the first carrier may be the one with a smaller carrier index, and the second carrier may be the one with a larger carrier index.

Manner 2: The user equipment receives information indicating a carrier corresponding to the enhanced physical downlink control channel physical resource block set, and determines, according to the information indicating the carrier corresponding to the enhanced physical downlink control channel physical resource block set, The carrier corresponding to the enhanced physical downlink control channel.

In the second mode, the information indicating the carrier corresponding to the enhanced physical downlink control channel physical resource block set may not be included in the information indicating the enhanced physical downlink control channel physical resource block set.

It should be noted that, in an embodiment, if the information indicating the physical resource block set carrying the enhanced physical downlink control channel in step 101 does not include information indicating the carrier corresponding to the enhanced physical downlink control channel physical resource block set, When the user equipment is not configured with the CIF, the user equipment determines, according to the mode 1 or the mode 2, the carrier corresponding to the received enhanced physical downlink control channel. If the user equipment is configured with the CIF, the user equipment determines the carrier corresponding to the physical downlink control channel according to the CIF field in the DCI corresponding to the EPDCCH.

Step 103: The user equipment receives a physical downlink shared channel on the determined carrier according to the received EPDCCH, or sends a physical uplink shared channel on the determined carrier according to the received EPDCCH.

In this step, the user equipment receives the physical on the determined carrier according to the received EPDCCH. The downlink shared channel or the physical uplink shared channel.

The carrier corresponding to the enhanced physical downlink control channel may be a carrier of the enhanced physical downlink control channel scheduling.

In this embodiment, the information indicating the physical resource block set carrying the enhanced physical downlink control channel includes information indicating a carrier corresponding to the physical resource block set carrying the enhanced physical downlink control channel;

And determining the received carrier corresponding to the enhanced physical downlink control channel according to the information of the carrier corresponding to the physical resource block set indicating the enhanced physical downlink control channel.

On the other hand, the information indicating the physical resource block set carrying the enhanced physical downlink control channel is included in the configuration information of the enhanced physical downlink control channel EPDCCH, or the carrier indication field CIF configuration information.

In a further aspect, the physical resource block set is one of a set of physical resource blocks of at least two enhanced physical downlink control channels that are included in a carrier of the physical resource block set of the enhanced physical downlink control channel, where The at least two physical resource block sets correspond to at least two different enhanced physical downlink control channels, and the at least two different enhanced physical downlink control channel scheduling carriers are different.

Optionally, the foregoing at least two physical resource block sets corresponding to the at least two different enhanced physical downlink control channels may include at least two physical resource block sets and corresponding to at least two different enhanced physical downlink control channels. .

Optionally, the foregoing at least two physical resource block sets corresponding to the at least two different enhanced physical downlink control channels may include at least two physical resource block sets corresponding to the same enhanced physical downlink control channel, or at least two Different enhanced physical downlink control channels correspond to corresponding sets of physical resource blocks.

In an embodiment, the determining, by the user equipment, the received carrier corresponding to the enhanced physical downlink control channel according to the information of the physical resource block set for indicating the enhanced physical downlink control channel, includes:

And the user equipment determines, according to the information about the physical resource block set indicating the enhanced physical downlink control channel, and the corresponding relationship between the physical resource block set and the carrier, the carrier corresponding to the enhanced physical downlink control channel. Before determining the carrier corresponding to the received enhanced physical downlink control channel according to the information of the physical resource block set indicating the enhanced physical downlink control channel, the method further includes:

The user equipment determines that the carrier indication domain CIF is not configured.

The carrier corresponding to the enhanced physical downlink control channel may be a carrier scheduled by the enhanced physical downlink control channel.

The enhanced physical downlink control channel and the corresponding relationship between the carriers may be stored in the user equipment.

In the embodiment of the present invention, the cross-carrier scheduling under the EPDCCH is implemented by associating the enhanced physical downlink control channel physical resource block set with the carrier, and the EPDCCH can be improved by not adding the 3-bit CIF in the DCI, thereby increasing the DCI payload. Transmission performance, on the other hand, because the cross-carrier scheduling mechanism that supports the addition of a 3-bit CIF domain in the DCI is a UE capability, and only some user equipments can be supported in the system, the present invention enables all UEs to Support cross-carrier scheduling.

Embodiment 2 of the present invention will be described in detail below with reference to FIG.

Step 201: The base station sends, to the user equipment, information for indicating a physical resource block set carrying the enhanced physical downlink control channel.

In this step, the base station sends information to the user equipment for indicating a physical resource block set carrying the enhanced physical downlink control channel.

In an aspect, the information indicating the physical resource block set carrying the enhanced physical downlink control channel may include information indicating a carrier corresponding to the enhanced physical downlink control channel physical resource block set. When it is determined that there are at least two physical resource block sets on one carrier according to the information indicating the physical resource block set of the physical downlink control channel, the carriers corresponding to at least two physical resource block sets are different.

The information indicating the physical resource block set of the enhanced physical downlink control channel may be: when the CIF is not configured for the user equipment, the information indicating the physical resource block set indicating the enhanced physical downlink control channel includes the indication enhancement. The information of the carrier corresponding to the physical resource block set of the physical downlink control channel; when the CIF is configured for the user equipment, the information indicating the physical resource block set of the enhanced physical downlink control channel does not include the physical downlink control channel physics indicating the enhanced The information of the carrier corresponding to the resource block set.

The other features of the information indicating the physical resource block set of the enhanced physical downlink control channel are as described in step 101 in Embodiment 1, and details are not described herein again.

Step 202: The base station determines a carrier that the user equipment needs to be scheduled, and determines, according to the carrier, the physical resource block set that carries the enhanced physical downlink control channel corresponding to the carrier. In this step, the base station determines the carrier that the user equipment needs to be scheduled, and may refer to the downlink carrier that the base station determines to carry the PDSCH scheduled by the user equipment, and may also refer to the uplink carrier that the base station determines to bear the PUSCH scheduled by the user equipment.

In one aspect, the base station may determine, according to the correspondence between the physical resource block set and the carrier, and the carrier to be scheduled, the physical resource block set of the enhanced physical downlink control channel corresponding to the carrier that needs to be scheduled;

On the other hand, when the base station determines that the user equipment is not configured with the CIF, the base station may determine, according to the correspondence between the physical resource block set and the carrier, and the carrier that needs to be scheduled, the enhanced physical medium corresponding to the carrier that needs to be scheduled. a set of physical resource blocks of the downlink control channel;

When the information indicating the physical resource block set carrying the enhanced physical downlink control channel in step 201 includes the information indicating the carrier corresponding to the enhanced physical downlink control channel physical resource block set, the physical resource block set corresponds to the carrier. The relationship may be consistent with the correspondence between the physical resource block set and the carrier indicated by the information of the carrier corresponding to the physical downlink control channel physical resource block set indicating the enhanced.

In addition, the corresponding relationship between the physical resource block set and the carrier may be as follows: the first physical resource block set corresponds to the first carrier, and/or the second physical resource block set corresponds to the second carrier;

The correspondence between the carrier and the set of physical resource blocks carrying the enhanced physical downlink control channel corresponding to the carrier may be stored in the base station.

Step 203: The base station sends the enhanced physical downlink control channel to the user equipment by using the physical resource included in the physical resource block set, so that the user equipment is configured according to the physical resource of the physical downlink control channel enhanced by the user equipment. The set of blocks determines the carrier corresponding to the received enhanced physical downlink control channel;

Regarding the technical features of the user equipment or the corresponding execution method, reference may be made to the foregoing embodiments. Step 204: The base station sends, to the user equipment, a physical downlink shared channel corresponding to the enhanced physical downlink control channel, or a carrier corresponding to the enhanced physical downlink control channel, on a carrier corresponding to the enhanced physical downlink control channel. And receiving, by the user equipment, a physical uplink shared channel corresponding to the enhanced physical downlink control channel.

The carrier corresponding to the enhanced physical downlink control channel may be a carrier scheduled by the enhanced physical downlink control channel. The information indicating the physical resource block set carrying the enhanced physical downlink control channel includes information indicating a carrier corresponding to the physical resource block set carrying the enhanced physical downlink control channel.

The information indicating the physical resource block set carrying the enhanced physical downlink control channel is included in the configuration information of the enhanced physical downlink control channel EPDCCH, or the carrier indication field CIF configuration information.

The information indicating the physical resource block set carrying the enhanced physical downlink control channel includes information indicating a carrier corresponding to the physical resource block set carrying the enhanced physical downlink control channel;

The physical resource block set is one of at least two physical resource block sets of the enhanced physical downlink control channel included in the carrier of the physical resource block set of the enhanced physical downlink control channel, the at least two physical The resource block set corresponds to at least two different enhanced physical downlink control channels, and the at least two different enhanced physical downlink control channel scheduling carriers are different.

Determining, according to the carrier, the set of physical resource blocks that carry the enhanced physical downlink control channel corresponding to the carrier, including:

Determining, according to the carrier, a correspondence between the physical resource set and the carrier, a physical resource block set carrying the enhanced physical downlink control channel corresponding to the carrier.

In the embodiment of the present invention, the cross-carrier scheduling under the EPDCCH is implemented by associating the enhanced physical downlink control channel physical resource block set with the carrier, and the EPDCCH can be improved by not adding the 3-bit CIF in the DCI, thereby increasing the DCI payload. The transmission performance, on the other hand, enables all UEs to support cross-carrier scheduling.

Embodiment 3 of the present invention will be described in detail below with reference to FIG.

An apparatus for transmitting a downlink control channel includes:

The transceiver module 301 is configured to receive information for indicating a physical resource block set carrying the enhanced physical downlink control channel, and receive the enhanced physical according to the information used to indicate the physical resource block set carrying the enhanced physical downlink control channel. Downlink control channel;

a determining module 302, configured to: according to the object used to indicate an enhanced physical downlink control channel The information of the resource block set determines the carrier corresponding to the received enhanced physical downlink control channel;

The transceiver module 301 is further configured to: receive, according to the received EPDCCH, a physical downlink shared channel on the determined carrier wave or send a physical uplink shared channel on the determined carrier according to the received EPDCCH.

The determining module is specifically configured to determine, according to the information about the physical resource block set indicating the enhanced physical downlink control channel, and the relationship between the physical resource block set and the carrier, the received enhanced The carrier corresponding to the physical downlink control channel.

The determining module is specifically configured to determine that the user equipment is not configured with a carrier indication domain CIF. The information indicating the physical resource block set carrying the enhanced physical downlink control channel is included in the configuration information of the enhanced physical downlink control channel EPDCCH, or the carrier indication field CIF configuration information.

Embodiment 4 of the present invention will be described in detail below with reference to FIG.

An apparatus for transmitting a downlink control channel includes:

The transceiver module 401 is configured to send, to the user equipment, information for indicating a physical resource block set carrying the enhanced physical downlink control channel;

The determining module 402 is configured to determine a carrier that the user equipment needs to schedule, and determine, according to the carrier, a physical resource block set that carries the enhanced physical downlink control channel corresponding to the carrier;

The transceiver module 401 is further configured to send the enhanced physical downlink control channel by using the physical resource included in the physical resource block set, so that the user equipment is configured according to the physical resource of the enhanced physical downlink control channel of the bearer. The set of blocks determines the carrier corresponding to the received enhanced physical downlink control channel; The transceiver module 401 is further configured to send, by using a carrier corresponding to the enhanced physical downlink control channel, a physical downlink shared channel corresponding to the enhanced physical downlink control channel to the user equipment, or

The transceiver module 401 is configured to receive, on a carrier corresponding to the enhanced physical downlink control channel, a physical uplink shared channel corresponding to the enhanced physical downlink control channel sent by the user equipment.

The information indicating the physical resource block set carrying the enhanced physical downlink control channel includes information indicating a carrier corresponding to the physical resource block set carrying the enhanced physical downlink control channel.

The determining module 402 is specifically configured to determine, according to the carrier, a correspondence between the physical resource set and the carrier, the physical resource block set that carries the enhanced physical downlink control channel corresponding to the carrier.

The determining module is further configured to determine that the user equipment is not configured with a carrier indication domain CIF. Embodiment 5 of the present invention will be described in detail below with reference to FIG.

An apparatus for transmitting a downlink control channel includes:

The receiver 501 is configured to receive information for indicating a physical resource block set carrying the enhanced physical downlink control channel, and receive the enhanced physical according to the information used to indicate the physical resource block set carrying the enhanced physical downlink control channel. Downlink control channel;

The processor 502 is configured to determine, according to the information about the physical resource block set indicating the enhanced physical downlink control channel, the received carrier corresponding to the enhanced physical downlink control channel, where the receiver 501 is configured to: Receiving, by the received EPDCCH, a physical downlink shared channel on the determined carrier,

Or, optionally, the transmitter 503 is further configured to send, according to the received EPDCCH, a physical uplink shared channel on the determined carrier.

Regarding other functions and structures of the apparatus in this embodiment, reference may be made to the above-described method embodiments. Embodiment 6 of the present invention will be described in detail below with reference to FIG.

The transmitter 601 is configured to send, to the user equipment, information for indicating a physical resource block set carrying the enhanced physical downlink control channel;

The processor 602 is configured to determine a carrier that the user equipment needs to be scheduled, and determine, according to the carrier, the physical resource block set that carries the enhanced physical downlink control channel corresponding to the carrier;

The transmitter 601 is further configured to send, by using the physical resource included in the physical resource block set, the enhanced physical downlink control channel to the user equipment, so that the user equipment is enhanced according to the physical downlink of the bearer. The set of physical resource blocks of the control channel determines the carrier corresponding to the received enhanced physical downlink control channel;

The transmitter 601 is further configured to send, by using a carrier corresponding to the enhanced physical downlink control channel, a physical downlink shared channel corresponding to the enhanced physical downlink control channel to the user equipment, or, optionally, The receiver 602 is configured to receive, on a carrier corresponding to the enhanced physical downlink control channel, a physical uplink shared channel corresponding to the enhanced physical downlink control channel sent by the user equipment. Regarding other functions and structures of the apparatus in this embodiment, reference may be made to the above-described method embodiments. Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in a combination of electronic hardware or computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

A person skilled in the art can clearly understand that the specific working process of the system, the device and the unit described above can be referred to the corresponding process in the foregoing method embodiments for the convenience and brevity of the description, and details are not described herein again.

In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form. The components displayed for the unit may or may not be physical units, ie may be located in one place, or may be distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including The instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

Claim

A method for transmitting a downlink control channel, comprising:

Receiving information for indicating a physical resource block set carrying the enhanced physical downlink control channel, and receiving an enhanced physical downlink control channel according to the information indicating the physical resource block set carrying the enhanced physical downlink control channel;

Determining, according to the information indicating a physical resource block set carrying the enhanced physical downlink control channel, a carrier corresponding to the received enhanced physical downlink control channel;

The method according to claim 1, wherein the method before determining the carrier corresponding to the received enhanced physical downlink control channel according to the information indicating the physical resource block set of the physical downlink control channel that carries the enhanced Also includes:

The method according to claim 1 or 2, wherein the information indicating the physical resource block set carrying the enhanced physical downlink control channel includes a physical resource block set corresponding to the enhanced physical downlink control channel. Carrier information

Determining the received carrier corresponding to the enhanced physical downlink control channel according to the information about the physical resource block set for indicating the enhanced physical downlink control channel, including:

The method according to claim 1 or 2, wherein the determining, according to the information indicating a physical resource block set of the physical downlink control channel carrying the enhanced, the received physical downlink control received The carrier corresponding to the channel, including:

And determining, according to the information about the physical resource block set indicating the enhanced physical downlink control channel, and the corresponding relationship between the physical resource block set and the carrier, the received carrier corresponding to the enhanced physical downlink control channel.

The method according to claim 1 or 3 or 4, wherein the information indicating the physical resource block set carrying the enhanced physical downlink control channel carries the configuration information of the enhanced physical downlink control channel EPDCCH, or The carrier indicates the domain CIF configuration information.

The method according to any one of claims 1-5, wherein the physical resource block set is at least two bearers included on a carrier where the physical resource block set of the enhanced physical downlink control channel is located. One of the physical resource block sets of the enhanced physical downlink control channel, the at least two physical resource block sets corresponding to at least two different enhanced physical downlink control channels, the at least two different enhanced physical downlink control channels The carrier of the channel scheduling is different.

A transmission method for a downlink control channel, comprising:

Transmitting, to the user equipment, information indicating a set of physical resource blocks carrying the enhanced physical downlink control channel;

Determining a carrier that the user equipment needs to be scheduled, and determining, according to the carrier, the physical resource block set that carries the enhanced physical downlink control channel corresponding to the carrier;

The method according to claim 7, wherein the determining a carrier that the user equipment needs to schedule, determining, according to the carrier, the set of physical resource blocks that carry the enhanced physical downlink control channel corresponding to the carrier , Also includes:

It is determined that the user equipment is not configured with a carrier indication domain CIF.

The method according to claim 7 or 8, wherein the information indicating the physical resource block set carrying the enhanced physical downlink control channel comprises a physical resource block set corresponding to the enhanced physical downlink control channel. Carrier information

And determining, by the user equipment, the received carrier corresponding to the enhanced physical downlink control channel according to the physical resource block set of the physical downlink control channel that is enhanced by the bearer, including:

The method according to any one of claims 7-9, wherein the information indicating the physical resource block set carrying the enhanced physical downlink control channel is included in the enhanced physical downlink control. The configuration information of the channel EPDCCH, or the carrier indication field CIF configuration information.

The method according to any one of claims 7 to 10, wherein the physical resource block set is at least two bearers included on a carrier where the physical resource block set of the enhanced physical downlink control channel is located. One of the physical resource block sets of the enhanced physical downlink control channel, the at least two physical resource block sets corresponding to at least two different enhanced physical downlink control channels, the at least two different enhanced physical downlink control channels The carrier of the channel scheduling is different.

12. Method according to claim 7 or 8 or 10 or 11, characterized in that

Determining, according to the carrier, the physical resource block set that carries the enhanced physical downlink control channel corresponding to the carrier, including:

Determining, according to the carrier, a correspondence between the physical resource set and the carrier, the physical resource block set that carries the enhanced physical downlink control channel corresponding to the carrier.

13. A device for transmitting a downlink control channel, comprising:

And a transceiver module, configured to receive information for indicating a physical resource block set carrying the enhanced physical downlink control channel, and receive enhanced physical downlink according to the information used to indicate a physical resource block set carrying the enhanced physical downlink control channel Control channel

a determining module, configured to determine, according to the information used to indicate a physical resource block set carrying the enhanced physical downlink control channel, the received carrier corresponding to the enhanced physical downlink control channel;

The transceiver module is further configured to: receive, according to the received EPDCCH, a physical downlink shared channel on the determined carrier, or send a physical uplink shared channel on the determined carrier according to the received EPDCCH.

The device according to claim 13, wherein the information indicating the physical resource block set carrying the enhanced physical downlink control channel includes a carrier corresponding to the physical resource block set indicating the enhanced physical downlink control channel. Information

The device according to claim 13 or 14, wherein the information indicating the physical resource block set carrying the enhanced physical downlink control channel carries the configuration information of the enhanced physical downlink control channel EPDCCH, or the carrier indication Domain CIF configuration information.

16. Apparatus according to claim 13 or claim 15 wherein:

The determining module is specifically configured to determine, according to the information, a set of physical resource blocks used to indicate an enhanced physical downlink control channel, and a relationship between the physical resource block set and the carrier The carrier corresponding to the enhanced physical downlink control channel received.

The device according to any one of claims 13-16, wherein the physical resource block set is at least two bearers included on a carrier where the physical resource block set of the enhanced physical downlink control channel is located. One of the physical resource block sets of the enhanced physical downlink control channel, the at least two physical resource block sets corresponding to at least two different enhanced physical downlink control channels, the at least two different enhanced physical downlink control channels The carrier of the channel scheduling is different.

The device according to any one of claims 13-17, wherein the determining module is specifically configured to determine that the user equipment is not configured with a carrier indication field CIF.

19. A device for transmitting a downlink control channel, comprising:

a transceiver module, configured to send, to the user equipment, information indicating a physical resource block set carrying the enhanced physical downlink control channel;

a determining module, configured to determine a carrier that the user equipment needs to schedule, and determine, according to the carrier, a physical resource block set that carries an enhanced physical downlink control channel corresponding to the carrier;

The transceiver module is further configured to send, by using a carrier corresponding to the enhanced physical downlink control channel, a physical downlink shared channel corresponding to the enhanced physical downlink control channel to the user equipment, or

The transceiver module is configured to receive, on a carrier corresponding to the enhanced physical downlink control channel, a physical uplink shared channel corresponding to the enhanced physical downlink control channel sent by the user equipment.

The device according to claim 19, wherein the information indicating the physical resource block set carrying the enhanced physical downlink control channel comprises a carrier corresponding to the physical resource block set indicating the enhanced physical downlink control channel. information.

The device according to claim 19 or 20, wherein the information indicating the physical resource block set carrying the enhanced physical downlink control channel is included in the configuration information of the enhanced physical downlink control channel EPDCCH, or the carrier Indicates the domain CIF configuration information.

The device according to any one of claims 19 to 21, wherein the physical resource block set is at least two bearers included on a carrier where the physical resource block set of the enhanced physical downlink control channel is located. One of the physical resource block sets of the enhanced physical downlink control channel, the at least two physical resource block sets corresponding to at least two different enhanced physical downlink control channels, the at least two different enhanced physical downlink control channels The carrier of the channel scheduling is different.

The device according to claim 19 or 21 or 22, wherein the determining module is specifically configured to determine the bearer according to the carrier, and a correspondence between the physical resource set and the carrier A set of physical resource blocks of the enhanced physical downlink control channel corresponding to the carrier.

The device according to any one of claims 19-23, wherein the determining module is further configured to determine that the user equipment is not configured with a carrier indication field CIF.

25. An apparatus for transmitting a downlink control channel, comprising:

And receiving, by the receiver, information for indicating a physical resource block set carrying the enhanced physical downlink control channel, and receiving the enhanced physical downlink according to the information used to indicate the physical resource block set carrying the enhanced physical downlink control channel Control channel

a processor, configured to determine, according to the information indicating a physical resource block set that carries the enhanced physical downlink control channel, the received carrier corresponding to the enhanced physical downlink control channel;

The receiver, configured to receive a physical downlink shared channel on the determined carrier according to the received EPDCCH, or

And a transmitter, configured to send a physical uplink shared channel on the determined carrier according to the received EPDCCH.

26. An apparatus for transmitting a downlink control channel, comprising:

a transmitter, configured to send, to the user equipment, information indicating a physical resource block set carrying the enhanced physical downlink control channel;

The processor determines a carrier that the user equipment needs to schedule, and determines, according to the carrier, the physical resource block set that carries the enhanced physical downlink control channel corresponding to the carrier;

The transmitter is further configured to send, by using a carrier corresponding to the enhanced physical downlink control channel, a physical downlink shared channel corresponding to the enhanced physical downlink control channel to the user equipment, or

And a receiver, configured to receive, on a carrier corresponding to the enhanced physical downlink control channel, a physical uplink shared channel corresponding to the enhanced physical downlink control channel sent by the user equipment.