WO2013113261A1

WO2013113261A1 - Communication method, base station and user equipment

Info

Publication number: WO2013113261A1
Application number: PCT/CN2013/070745
Authority: WO
Inventors: 夏金环; 吕永霞
Original assignee: 华为技术有限公司
Priority date: 2012-02-01
Filing date: 2013-01-21
Publication date: 2013-08-08
Also published as: CN103248598B; CN103248598A

Abstract

Provided is a communication method. The method comprises: obtaining the number N_m of neglected orthogonal frequency division multiplex (OFDM) symbols of user equipment (UE), wherein N_m is used for indicating that data are not carried on the N_m OFDM symbols at the tail of a data domain of a downlink subframe sent by a base station (eNB) to the UE; and sending the downlink subframe to the UE in accordance with N_m. In accordance with the embodiments of the present invention, the possibility of some data of a downlink subframe being undetected because of being sent in advance in the switching process where the HD-FDD user equipment receives the downlink subframe and sends an uplink subframe is eliminated by determining the number of neglected OFDM symbols when the UE receives the downlink subframe, and the accuracy of the HD-FDD user equipment detecting the downlink subframe is increased.

Description

Communication method, base station and user equipment

The present application claims priority to Chinese Patent Application No. 201210022502.5, entitled "Communication Method, Base Station, and User Equipment", filed on February 1, 2012, the entire contents of which is incorporated herein by reference. .

Technical field

Embodiments of the present invention relate to the field of wireless communications, and more particularly, to a communication method, a base station, and a user equipment. Background technique

In the Long Term Evolution (LTE) system, in order to reduce the cost, a Half Duplex Frequency Division Duplex (HD-FDD type User Equipment (UE) is generally used. The uplink data of different UEs is configured to reach the evolved base station at the same time, and the UE needs to determine how much time to send the uplink data according to the distance from the base station, as shown in FIG. 1. The UE1 shown in FIG. 1 is closer to the base station. The distance between the UE2 and the base station is far away. Therefore, the time TA1 when the UE1 sends the uplink subframe in advance is smaller than the time TA2 when the UE2 sends the uplink subframe in advance, so that the uplink subframe sent by the UE1 and the UE2 can reach the base station at the same time. The UE needs to send an uplink subframe in the K + 1 subframe, and the downlink subframe needs to be received in the Kth subframe, the UE needs to send the uplink subframe in advance TA time, and the UE is working at the receiver in the Kth subframe. In the K + 1 subframe, the transmitter is working, and the work from the receiver to the transmitter requires a conversion time Tp, then In order to ensure that the UE can send the complete uplink subframe, the UE can not receive the last downlink data in the TA + Tp time of the K downlink subframes, a downlink data receiver resulting in reduced accuracy. SUMMARY OF THE INVENTION

The embodiment of the present invention provides a communication method, which is capable of determining the number of OFDM symbols that are ignored in the data domain tail of the downlink subframe received by the UE, and does not carry the downlink data sent by the eNB on the ignored OFDM symbols, thereby improving the UE. Detect the accuracy of the data in the downlink subframe. In one aspect, a communication method is provided, the method comprising:

Acquiring the number of ignored Orthogonal Frequency Division Multiplexing OFDM symbols N _{∞ of the} user equipment UE, where the N _{m is} used to indicate the N _尾 of the tail of the data field of the downlink subframe sent by the base station eNB to the UE No data is carried on the OFDM symbol;

And transmitting, according to the N _下行 , a downlink subframe to the UE.

In another aspect, a communication method is provided, the method comprising:

Sending a request message to the base station eNB, where the request message carries an absolute time-aligned TA value of the user equipment UE, or the number of orthogonal frequency division multiplexing OFDM symbols N _∞ that is ignored at the tail of the downlink subframe transmitted to the UE, so that the eNB according to the UE determines that the absolute value of TA or N _∞ acquiring the N _∞, wherein said N _∞ indicating the end of the data field of the downlink sub-frame transmitted by the eNB to the UE N _∞ OFDM symbols do not carry data;

Receiving a downlink subframe sent by the eNB, and acquiring downlink data from the downlink subframe according to the N _∞ .

In another aspect, a base station is provided, the base station including:

And an acquiring unit, configured to acquire a number of ignored orthogonal frequency division multiplexing OFDM symbols N _{∞ of the} user equipment UE, where the N _{∞ is} used to indicate a tail of a data domain of a downlink subframe that is sent by the base station eNB to the UE The N _∞ OFDM symbols do not carry data;

And a sending unit, configured to send, according to the N _∞ , a downlink subframe to the UE.

In another aspect, a user equipment is provided, where the user equipment includes:

a sending unit, configured to send a request message to the base station eNB, where the request message carries an absolute TA value of the user equipment, or the number of orthogonal frequency division multiplexing OFDM symbols that are ignored at the tail of the downlink subframe sent to the user equipment N _∞, so that the eNB determines that the acquisition of the N _∞ or N _∞ the absolute value TA of the user equipment, wherein the data representing N _∞ downlink subframes transmitted by the eNB to the user equipment The N _∞ OFDM symbols at the tail of the domain do not carry data;

a receiving unit, configured to receive a downlink subframe sent by the eNB, and acquire downlink data from the downlink subframe according to the N _∞ .

According to the embodiment of the present invention, the number of OFDM symbols that are ignored when the UE receives the downlink subframe is clarified, and the HD-FDD user equipment removes the downlink subframe and the uplink subframe, The possibility of data leakage detection in the downlink subframe partially improves the accuracy of detecting downlink subframes by the HD-FDD user equipment. On the other hand, the embodiment of the present invention provides a communication method, so that the base station can learn the capability configuration of the user equipment, and accordingly configure the uplink scheduling and/or downlink scheduling resources for the user equipment, which can effectively improve resource utilization. .

According to an embodiment of the present invention, a communication method is provided, where the method includes:

Receiving a capability configuration message sent by the user equipment UE, where the capability configuration message includes the

Capability indication information of the UE;

Sending an uplink scheduling grant and/or a downlink scheduling message to the UE, where the uplink scheduling grant and/or downlink scheduling message includes modulation and coding scheme MCS information and physical resource block PRB information, the MCS information and/or the PRB The information is determined according to the capability indication information of the UE.

In another aspect, a communication method is provided, the method comprising:

Transmitting a capability configuration message to the eNB, where the capability configuration message includes capability indication information of the UE;

Receiving, by the eNB, an uplink scheduling grant and/or a downlink scheduling message, where the uplink scheduling grant and/or the downlink scheduling message includes MCS information and PRB information, where the MCS information and/or the PRB information is according to the UE The capability indication information is determined.

In another aspect, a base station is provided, the base station including:

a receiving unit, configured to receive a capability configuration message sent by the user equipment UE, where the capability configuration message includes capability indication information of the UE;

a sending unit, configured to send an uplink scheduling grant and/or a downlink scheduling message to the UE, where the uplink scheduling grant and/or the downlink scheduling message includes MCS information and PRB information, the MCS information, and/or the PRB information Determined according to the capability indication information of the UE.

a sending unit, configured to send a capability configuration message to the eNB, where the capability configuration message includes capability indication information of the user equipment;

a receiving unit, configured to receive an uplink scheduling grant and/or a downlink scheduling message sent by the eNB, where the uplink scheduling grant and/or the downlink scheduling message includes MCS information and PRB information, where the MCS information and/or the PRB information is according to The capability indication information of the UE is determined.

According to the embodiment of the present invention, the UE reports the capability information of the UE to the eNB, so that the eNB can configure the uplink scheduling and/or the downlink scheduling message according to the specific situation of the UE, for example, the capacity of the transport block is limited. The amount, which saves the UE's cache, saves the UE cost. 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.

FIG. 1 is a schematic diagram of a user equipment transmitting an uplink subframe in advance;

2 is a schematic flow chart of a method in accordance with an embodiment of the present invention;

3 is a schematic flow chart of a specific scheme of a method according to an embodiment of the present invention;

4 is a schematic flow diagram of a method in accordance with another aspect of an embodiment of the present invention;

Figure 5 is a schematic flow diagram of a method in accordance with an embodiment of the present invention;

6 is a schematic flow chart of a specific scheme of a method according to an embodiment of the present invention;

7 is a schematic flow chart of a specific scheme of a method according to an embodiment of the present invention;

8 is a schematic flow diagram of a method in accordance with another aspect of an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a base station according to an embodiment of the present invention; FIG.

FIG. 10 is a schematic structural diagram of a base station according to another aspect of an embodiment of the present invention; FIG.

11 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of a user equipment according to another aspect of an 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 those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In the technical solution of the embodiment of the present invention, a user equipment (UE, User Equipment), which may also be called a mobile terminal, a mobile user equipment, or the like, may be accessed via a radio access network (eg, RAN, Radio Access Network). In communication with one or more core networks, the user equipment can be a mobile terminal, such as a mobile telephone (or "cellular" telephone) and a computer with a mobile terminal, For example, it may be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges language and/or data with a wireless access network.

2 is a schematic flow chart of a communication method according to an embodiment of the present invention. As shown in FIG. 2, the communication method 200 includes the steps of:

210: The eNB acquires the ignored orthogonal frequency division multiplexing of the UE (Orthogonal Frequency

The number of the multiplexes of the OFDM symbol is N _∞ , where the N _{∞ is} used to indicate that the N _∞ OFDM symbols at the tail of the data field of the downlink subframe that the eNB sends to the UE do not carry data;

220: The eNB sends a downlink subframe to the UE according to the N _∞ .

The implementation of the various steps of method 200 is described in detail below. For step 210, the N _∞ can be determined by the UE's Time Alignment (TA) value. In this case, as shown in FIG. 3, step 210 of method 200 specifically includes:

212: The eNB acquires an absolute time alignment TA value of the UE.

214: The eNB determines, according to the TA value of the UE, the N _{∞ of} the UE by using a predefined rule.

Determining the N _{所述 of} the UE by a predefined rule may be determined with reference to Table 1.

Table 1

As an alternative, for the step 210, the N _∞ may be determined by the UE according to its absolute TA value or other factors, and reported to the eNB by using a request message. Therefore, in this case, step 210 may specifically include:

The eNB receives the request message sent by the UE, where the request message carries the N _∞ . According to the present invention, for example, the request message is a media access control (Media Access Control, abbreviated MAC) message, a MAC message carrying the control unit (Control Element, referred to as CE), the CE to carry the N _∞ Information. For example, the N _∞ is represented by a decimal number corresponding to the bit sequence of the CE in the MAC message, for example, by a 3-bit sequence, for example, 010 indicates that the number of ignored OFDM symbols N _∞ is 2. Or, according to the embodiment of the present invention, the request message may be a channel that is sent by the UE on a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Sharing Channel (PUSCH). quality information (channel quality information, referred to as CQI) or channel state information (channel state information, CSI for short), which carries the CQI or CSI information of the N _∞.

Only Gen According to a further refinement of the embodiment of the present invention, since the different UE may have different TA values therefore ODFM symbols downlink subframe negligible different UE in N _∞ may be different, thus allowing negligible number of different ODFM symbols The N _∞ UE multiplexes the data domain portion of the same downlink subframe to further effectively utilize the spectrum resources.

Specifically, for example, the number of ignored OFDM symbols for UE1 obtained according to the TA value of the first UE (hereinafter referred to as UE1) is m _m , which is obtained according to the TA value of the second UE (hereinafter referred to as UE2) ignored UE2 number of OFDM symbols used to N2 _m, and for example N \ _{_m>} N2 _m. If the number of OFDM symbols included in the data field of the downlink subframe is Ν ₀ , the OFDM symbol of the data field of the downlink subframe may be divided into two parts according to the M _∞ and the N2 _,, where the first part is from the downlink The starting position of the data field of the frame is counted, and the number of OFDM symbols of the first part is N. - M _∞ , the second part is calculated from the end position of the first part, and the number of OFDM symbols of the second part is N\ _m _ N2 _m . The first part can be used by the eNB to send downlink data to the UE1, and the second part can be used by the eNB to send downlink data to the UE2.

In this case, the eNB may send a downlink scheduling message to the UE, for example, send Downlink Control Information (DCI), and include, in the DCI, a 1-bit indication field, for indicating that the UE is in the downlink subframe. Which part of the data field receives the downlink data. For example, 0 is used to indicate that downlink data is received in the first portion, and 1 is used to indicate that downlink data is received in the second portion. Therefore, the eNB may send a DCI to the UE1, where the indication field in the DCI is 0, indicating that the UE1 receives downlink data in the first part of the data field of the downlink subframe. Similarly, the eNB may send a DCI to the UE2, where the indication field in the DCI is 1, indicating that the UE2 receives the downlink data in the second part of the data field of the downlink subframe.

In another application scenario, the eNB may indicate, by using high layer signaling, for example, dedicated Radio Resource Control (RRC) signaling, that different UEs receive extended portions in different parts of the data domain of the downlink subframe. PDCCH. For example, the eNB sends RRC signaling to the UE1, where the RRC signaling includes a 1-bit indication field, and the value of the indication field is 0, indicating that the UE1 is in the downlink. The first portion of the data field of the subframe receives the extended PDCCH. Similarly, the eNB sends RRC signaling to the UE2, where the value of the indication field in the RRC signaling is 1, indicating that the UE2 receives the extended PDCCH in the second part of the data domain of the downlink subframe. In this case, the extended PDCCH and the downlink data occupy the same OFDM symbol in the time domain.

In another application scenario, the eNB may also use high-layer signaling, such as dedicated RRC signaling, to indicate that different UEs receive UE-specific downlink demodulation reference signals in different parts of the data domain of the downlink subframe (Downlink Demodulation). The reference signal (referred to as DMRS) uses a fixed pattern. The UE receives the DMRS according to the format, and performs channel estimation to assist in demodulating the downlink data. For example, the eNB sends RRC signaling to the UE1, where the RRC signaling includes a 1-bit indication field, and the value of the indication field is 0, indicating that the UE1 receives the UE1-specific DMRS in the first part of the data field of the downlink subframe. Similarly, the eNB sends RRC signaling to the UE2, where the value of the indication field in the RRC signaling is 1, indicating that the UE2 receives the UE2 specific DMRS in the second part of the data field of the downlink subframe. In this case, the distribution of the DMRS in different parts of the data field of the downlink subframe can still be configured by using the usual resource mapping manner.

Generally, from the perspective of an eNB, the UE performs uplink grant scheduling according to the eNB (UL).

The size of the Transport Block (TBB) is determined by the size of the Modulation Coding Scheme (MCS) and the Physical Resource Block (PRB), and the transport block TB is It is useful information that the UE needs to transmit within a scheduling interval. When the TB capacity is greater than 6144 bits, the TB needs to be segmented first, and then each segment is separately coded and rate matched. Then, the segments that complete the rate matching are combined, and then the subsequent modulation, resource mapping, and the like are performed. From the perspective of the UE, the eNB also transmits according to this rule, and the UE needs to perform inverse processing on each step implemented by the eNB, where the received data needs to be segment-decoded. That is to say, the UE needs a large amount of buffer to support the segmentation and decoding code. If the scheduling data does not exceed 6144 bits per time, the UE does not need segment coding and decoding, which saves the UE's cache.

According to the embodiment of the present invention, the eNB may receive the capability configuration message sent by the UE1, where the capability configuration message includes capability indication information of the UE1, and the capability indication information includes whether the UE belongs to a low capability UE, such as a low cost. Low-cost Machine Type Communication (Low-cost MTC) type UE, and/or whether UE1 supports code block segmentation, and/or whether UE1 supports high-order modulation mode, that is, 16/64 positive Width modulation (Quadrature) Amplitude Modulation, referred to as QAM).

Then, the eNB sends a downlink scheduling message, such as a DCI, to the UE1, where the DCI includes MCS information and PRB information, and the MCS information and/or the PRB information is determined according to the capability indication information of the first UE. For example, when UE1 only supports a low-order modulation mode, such as Quadrature Phase Shift Keying (QPSK), only some partial values of 0 to 9 and 5 bits are used in the index 0 to 31 of the MCS. The MCS can vacate 1 bit as a resource mapping indication field, which indicates which part of the OFDM symbol in the data domain of the downlink subframe is used by different UEs in resource mapping of the downlink subframe. For example, when the 1 bit is 0, it indicates that UE1 performs resource mapping using the ODFM symbol of the first part of the data field of the downlink subframe.

Similarly, the eNB may receive the capability configuration message sent by the UE2, where the capability configuration message includes capability indication information of the UE2, the capability indication information includes whether the UE belongs to a low capability UE, and/or whether the UE2 supports The code block segmentation, and/or whether UE2 supports high-order modulation.

Then, the eNB sends a downlink scheduling message, such as a DCI, to the UE2, where the DCI includes MCS information and PRB information, and the MCS information and/or the PRB information is determined according to the capability indication information of the UE2. For example, when UE2 only supports QPSK, the resource mapping indication field of the MCS is 1, indicating that UE2 performs resource mapping by using the OFDM symbol of the second part of the data field of the downlink subframe.

According to another aspect of the embodiments of the present invention, the eNB acquires capability information of the UE, and for this aspect of the UE embodiment, as shown in FIG. 4, a communication method 400 is proposed, where the method includes:

410: The eNB receives a capability configuration message sent by the UE, where the capability configuration message includes capability indication information of the UE.

420: The eNB sends an uplink scheduling grant and/or a downlink scheduling message to the UE, where the uplink scheduling grant and/or the downlink scheduling message includes MCS information and PRB information, where the MCS information and/or the PRB information is The capability indication information of the UE is determined.

The capability indication information described herein includes whether the UE belongs to a low capability type UE, and/or whether the UE supports code block segmentation, and/or whether the UE supports high order modulation. The eNB determines an MSC and/or a PRB for uplink scheduling grant and/or downlink scheduling according to the capability indication information of the UE. The implementation process of the method of the embodiment of the present invention is described above from the perspective of the eNB. The implementation process of the method of the embodiment of the present invention is further explained from the perspective of the UE.

FIG. 5 is a schematic flow diagram of a communication method 500 in accordance with an embodiment of the present invention. As shown, the method 500 includes:

510: The UE sends a request message to the base station eNB, where the request message carries information indicating the number of ignored orthogonal frequency division multiplexing OFDM symbols N _∞ of the user equipment UE, where the N _{∞ is} used to indicate the base station eNB. The N _∞ OFDM symbols at the tail of the data field of the downlink subframe transmitted to the UE do not carry data;

520: The UE receives the downlink subframe sent by the eNB, and acquires downlink data from the downlink subframe according to the N _∞ .

According to an embodiment of the present invention, the information indicating the ignored OFDM symbol number N _m of the UE is an absolute time alignment TA value of the UE, and the absolute TA value of the UE is used by the eNB to determine The N _∞ .

According to an embodiment of the present invention, the means for indicating the UE neglected orthogonal frequency division multiplexing OFDM symbol number information N _∞ is the value of N _∞.

According to an embodiment of the present invention, the request message is a media access control (MAC) message, the message carries the MAC control unit CE, the information of the N _∞ CE on the carrier. Alternatively, the message is a request or a channel state information CQI (Channel State Information, referred to as CSI) is sent on the PUCCH or the PUSCH in, or wherein the CQI information is carried on the N _∞ CSI.

According to the above, the number of OFDM symbols included in the data field of the downlink subframe is N. The number of OFDM symbols that can be used to receive the valid part of the downlink data in the data field of the downlink subframe is N ₀ -N _m . As shown in FIG. 6 , before the step 520, the method further includes:

515: The UE receives a downlink scheduling message sent by the eNB, where the downlink scheduling message indicates that the UE receives downlink data in the valid part of the downlink subframe.

According to the above, as shown in FIG. 7, before step 520, the method may also include:

516: The UE receives the first downlink control information DCI sent by the eNB, where the first DCI includes first indication information, where the first indication information is used to indicate that the UE is in the downlink subframe. The valid portion of the data field receives the extended PDCCH channel and/or a particular reference signal for the UE.

According to the foregoing, the UE may report its own capability to the eNB, so that the eNB according to the UE The MCS and the PRB information are configured to be different, and are sent to the UE by using a downlink scheduling message. Therefore, the method 500 may further include the following steps:

The UE sends a capability configuration message to the eNB, where the capability configuration message includes capability indication information of the UE, in which case the downlink scheduling message includes MCS information and PRB information, and the MCS information and/or the The PRB information is determined according to the capability indication information of the UE. The capability information of the UE includes whether the UE is a low capability UE, and/or whether the UE supports code block segmentation, and/or whether the UE supports high order modulation. In this case, the MCS information in the downlink scheduling message includes a resource mapping indication field, where the resource mapping indication field is used to instruct the UE to perform resource mapping by using the valid part of the downlink subframe.

Corresponding to the other aspect of the embodiment of the present invention, the eNB acquires the capability information of the UE, and according to this aspect of the embodiment of the present invention, as shown in FIG. 8, a communication method 800 is proposed, where the method includes:

810: The UE sends a capability configuration message to the eNB, where the capability configuration message includes capability indication information of the UE.

820: Receive an uplink scheduling grant and/or a downlink scheduling message sent by the eNB, where the uplink scheduling grant and/or the downlink scheduling message includes MCS information and PRB information, where the MCS information and/or the PRB information is The capability indication information of the UE is determined.

Similarly, the capability indication information described herein includes whether the UE belongs to a low capability type UE, and/or whether the UE supports code block segmentation, and/or whether the UE supports high order modulation. The eNB determines the MSC and/or PRB for uplink scheduling grant and/or downlink scheduling based on the capability indication information of the UE.

According to the embodiment of the present invention, the number of OFDM symbols that are ignored when the UE receives the downlink subframe is clarified, and the HD-FDD user equipment removes the downlink subframe and the uplink subframe, The possibility of data leakage detection in the downlink subframe partially improves the accuracy of detecting downlink subframes by the HD-FDD user equipment.

In addition, according to the embodiment of the present invention, according to different numbers of OFDM symbols that are ignored by different UEs, UEs with different TA values can multiplex the data fields of the same inferior subframe to receive downlink data, and improve downlink subframes. Resource utilization.

In addition, according to the embodiment of the present invention, the UE reports its own capability information to the eNB, so that the eNB can configure an uplink scheduling and/or a downlink scheduling message according to the specific situation of the UE, for example, defining a transport block. Capacity, which saves the UE's cache and saves UE costs.

According to an embodiment of the present invention, a base station implementing the method of the embodiment of the present invention is also proposed. FIG. 9 is a schematic structural diagram of a base station 900 according to an embodiment of the present invention. As shown in FIG. 9, the base station 900 includes: an obtaining unit 910, configured to acquire a number of ignored orthogonal frequency division multiplexing OFDM symbols N _{∞ of the} user equipment UE, where the N _{∞ is} used to indicate that the base station eNB is to the UE The N _∞ OFDM symbols at the tail of the data field of the transmitted downlink subframe do not carry data;

The sending unit 920 is configured to send, according to the N _∞ , a downlink subframe to the UE.

According to the embodiment of the present invention, the acquiring unit 910 is specifically configured to acquire an absolute time alignment TA value of the UE, and determine, according to the TA value of the UE, the N _{∞ of} the UE by using a predefined rule. .

According to an embodiment of the present invention, the acquiring unit 910 is specifically configured to receive a request message sent by the UE, where the request message carries the N _∞ .

According to an embodiment of the present invention, the request message is a media access control (MAC) message, the message carries the MAC control unit CE, the information of the N _∞ CE on the carrier.

According to an embodiment of the present invention, the request message is that the UE is in an uplink physical control channel.

Or PUCCH transmitted on physical uplink shared channel PUSCH channel quality information CQI or CSI channel state information, wherein the information carrier the CQI or CSI on the N _∞.

According to an embodiment of the present invention, the UE specifically includes a first UE and a second UE, where the N _∞ specifically includes M _用于 for the first UE, and N2 _用于 for the second UE, and Said M _{∞ is} greater than said N2 _∞ ,

The data field of the downlink subframe includes the number of OFDM symbols being N. The OFDM symbol of the data field of the downlink subframe is divided into two parts according to the M _∞ and the N2 _,, wherein the first part is calculated from a start position of a data domain of the downlink subframe, and the first part is OFDM. The number of symbols is N ₀ - N\ _m , the second part is calculated from the end position of the first part, and the number of OFDM symbols of the second part is N\ _m - N2 _m ,

The sending unit 920 is specifically configured to send a downlink scheduling message to the first UE, where the downlink scheduling message indicates that the first UE receives downlink data in the first part of the downlink subframe.

According to the embodiment of the present invention, the sending unit 920 is specifically configured to send a downlink scheduling message to the second UE, where the downlink scheduling message indicates that the second UE is in the downlink subframe The second part receives the downlink data.

According to the embodiment of the present invention, the sending unit 920 is specifically configured to send the first downlink control information DCI to the first UE in the PDCCH, where the first DCI includes first indication information, and the first indication information is used by the first indication information. The first UE is instructed to receive an extended PDCCH channel and/or a reference signal specific to the first UE in the first part of a data domain of the downlink subframe.

According to the embodiment of the present invention, the PDCCH sends the second downlink control information DCI to the second UE, where the second DCI includes second indication information, where the second indication information is used to indicate that the second UE is in the The second portion of the data field of the downlink subframe receives the extended PDCCH channel and/or a reference signal specific to the second UE.

According to an embodiment of the present invention, the acquiring unit 910 is further configured to receive a capability configuration message sent by the first UE, where the capability configuration message includes capability indication information of the first UE, and the downlink scheduling message includes modulation The coding scheme MCS information and the physical resource block PRB information, the MCS information and/or the PRB information are determined according to the capability indication information of the first UE.

According to an embodiment of the present invention, the capability information of the first UE includes whether the first UE is a low-capability type UE, and/or whether the first UE is a supported code block segment, and/or the Whether the first UE supports high order modulation.

According to the embodiment of the present invention, the MCS information in the downlink scheduling message includes a resource mapping indication field, where the resource mapping indication field is used to indicate that the first UE uses the first part of the downlink subframe to perform resources. Mapping.

According to the embodiment of the present invention, the acquiring unit 910 is further configured to receive a capability configuration message sent by the second UE, where the capability configuration message includes capability indication information of the second UE, and the downlink scheduling message includes modulation The coding scheme MCS information and the physical resource block PRB information, the MCS information and/or the PRB information are determined according to the capability indication information of the second UE.

According to an embodiment of the present invention, the capability indication information of the second UE includes at least one of the following: whether the second UE is a low-capability UE, and whether the second UE is a supported code block. a segment, and whether the second UE supports high order modulation.

According to an embodiment of the present invention, the MCS information in the downlink scheduling message includes a resource mapping indication field, where the resource mapping indication field is used to indicate that the second UE performs the second part of the downlink subframe. Resource mapping. According to an embodiment of the present invention, another base station for implementing the method of the embodiment of the present invention is proposed. FIG. 10 is a schematic structural diagram of another base station 1000 according to an embodiment of the present invention. As shown in FIG. 9, the base station 1000 includes:

The receiving unit 1010 is configured to receive a capability configuration message sent by the UE, where the capability configuration message includes capability indication information of the UE;

The sending unit 1020 is configured to send an uplink scheduling grant and/or a downlink scheduling message to the UE, where the uplink scheduling grant and/or the downlink scheduling message includes MCS information and PRB information, the MCS information, and/or the PRB The information is determined according to the capability indication information of the UE.

According to an embodiment of the present invention, the capability indication information of the UE includes at least one of the following: whether the UE is a low-capability UE, whether the UE supports code block segmentation, and whether the UE is Support for high-order modulation.

According to an embodiment of the present invention, a user equipment for implementing the method of the embodiment of the present invention is proposed. FIG. 11 is a schematic structural diagram of a user equipment 1100 according to an embodiment of the present invention. As shown in Figure 10, the user device 1100 includes:

The sending unit 1110 is configured to send a request message to the base station eNB, where the request message carries the absolute TA value of the user equipment 1100, or the orthogonal frequency division multiplexing of the tail of the downlink subframe sent to the user equipment 1100 is ignored. The number of OFDM symbols is N _∞ such that the eNB determines the N _根据 or acquires the N _根据 according to the TA value of the user equipment 1100, where the N _∞ indicates the downlink sent by the eNB to the user equipment 1100. The N _∞ OFDM symbols at the end of the data field of the subframe do not carry data;

The receiving unit 1120 is configured to receive a downlink subframe sent by the eNB, and acquire downlink data from the downlink subframe according to the N _∞ .

According to an embodiment of the present invention, the request message is channel quality information CQI or channel state information CSI transmitted on an uplink physical control channel PUCCH or an uplink physical shared channel PUSCH, where the CQI or CSI carries the N _∞ information.

According to an embodiment of the present invention, the data field of the downlink subframe includes an OFDM symbol number of N. The number of OFDM symbols that can be used to receive the effective part of the downlink data in the data field of the downlink subframe is N ₀ -N _m , and the receiving unit 1120 is specifically configured to receive a downlink scheduling message sent by the eNB, where The downlink scheduling message indicates that the UE receives downlink data in the valid part of the downlink subframe. According to the embodiment of the present invention, the receiving unit 1120 is specifically configured to receive, by using the PDCCH, the first downlink control information DCI sent by the eNB, where the first DCI includes first indication information, where the first indication information is used. Instructing the UE to receive an extended PDCCH channel and/or a reference signal specific to the UE in the active portion of the data domain of the downlink subframe.

According to the embodiment of the present invention, the sending unit 1110 is specifically configured to send a capability configuration message to the eNB, where the capability configuration message includes capability indication information of the UE, and the downlink scheduling message includes a modulation and coding scheme MCS information. Physical resource block PRB information, the MCS information and/or the PRB information is determined according to the capability indication information of the UE.

According to the embodiment of the present invention, the MCS information in the downlink scheduling message includes a resource mapping indication field, where the resource mapping indication field is used to instruct the UE to perform resource mapping by using the valid part of the downlink subframe.

Another user equipment for implementing the method of the embodiment of the present invention is proposed in accordance with an embodiment of the present invention. FIG. 12 is a schematic structural diagram of another user equipment 1200 according to an embodiment of the present invention. As shown in FIG. 12, the user equipment 1200 includes:

The sending unit 1210 is configured to send a capability configuration message to the eNB, where the capability configuration message includes capability indication information of the user equipment 1200.

The receiving unit 1220 is configured to receive an uplink scheduling grant and/or a downlink scheduling message sent by the eNB, where the uplink scheduling grant and/or the downlink scheduling message includes MCS information and PRB information, and the MCS information and/or the PRB information. Determined according to the capability indication information of the UE.

According to the embodiment of the present invention, the capability indication information of the user equipment 1200 includes at least one of the following: whether the user equipment is a low-capability UE, whether the UE supports code block segmentation, and Whether the UE supports high-order modulation.

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 electronic hardware or a combination of 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 to implement 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 for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, 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 electrical, mechanical or otherwise. The components displayed for the unit may or may not be physical units, i.e., 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 objectives 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 a 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

Rights request

A communication method, the method comprising:

And transmitting, according to the N _下行 , a downlink subframe to the UE.

2. The method of claim 1 wherein

Obtaining the number of ignored orthogonal frequency division multiplexing OFDM symbols N _{∞ of} the UE includes: acquiring a time aligned TA value of the UE;

Determining the N _{所述 of} the UE by a predefined rule according to the TA value.

3. The method of claim 1 wherein

The obtaining the number of ignored Orthogonal Frequency Division Multiplexing OFDM symbols N _{∞ of} the UE includes: receiving a request message sent by the UE, where the request message carries the N _m .

4. The method of claim 3, wherein

The request message is a media access control MAC message, and the MAC message carries a control unit

The information carried on the N _∞ CE CE, the.

5. The method of claim 3, wherein

The request message is a channel quality information (CQI) or channel state information CSI transmitted on physical uplink control channel PUCCH or PUSCH physical uplink shared channel of the UE, wherein the CQI or information carrier on said N _∞ CSI.

6. The method of claim 1 wherein

The UE includes a first UE and a second UE, where the N _∞ includes N\ _m for the first UE, N2 _用于 for the second UE, and the M _{∞ is} greater than the N2 _Oh ,

The data field of the downlink subframe includes the number of OFDM symbols being N. The OFDM symbol of the data field of the downlink subframe is divided into two parts, where the first part is calculated from the start position of the data field of the downlink subframe, and the number of OFDM symbols of the first part is N. - M _∞ , the second part is calculated from the end position of the first part, and the number of OFDM symbols of the second part is M _∞ - N2 _∞ ,

The method further includes:

Sending a first downlink scheduling message to the first UE, where the first downlink scheduling message is used to indicate that the first UE receives downlink data in the first part of the downlink subframe.

The method according to claim 6, wherein the method further includes: the first downlink scheduling message includes first downlink control information DCI, wherein the first DCI includes first indication information, The first indication information is used to indicate that the first UE receives an extended PDCCH channel and/or a reference signal specific to the first UE in the first part of a data domain of the downlink subframe.

The method according to claim 6 or 7, wherein the method further comprises: sending a second downlink scheduling message to the second UE, wherein the second downlink scheduling message indicates the second UE Downlink data is received in the second portion of the downlink subframe.

The method according to claim 8, wherein the method further comprises: the second downlink scheduling message includes second downlink control information DCI, wherein the second DCI includes second indication information, The second indication information is used to indicate that the second UE receives the extended PDCCH channel and/or the reference signal specific to the second UE in the second part of the data domain of the downlink subframe.

10. A communication method, the method comprising:

Capability indication information of the UE;

11. The method of claim 10, wherein

The capability indication information of the UE includes at least one of the following items:

Whether the UE is a low-capability UE,

Whether the UE supports code block segmentation, and

Whether the UE supports high order modulation.

12. A communication method, the method comprising:

Sending a request message to the base station eNB, where the request message carries information indicating the number of ignored orthogonal frequency division multiplexing OFDM symbols N _用户 of the user equipment UE, where the N _{∞ is} used to indicate the eNB The N _∞ OFDM symbols at the tail of the data field of the downlink subframe that is sent by the UE do not carry data;

Receiving a downlink subframe sent by the eNB, and acquiring the downlink subframe according to the N _∞ Row data.

The method according to claim 12, wherein the information indicating the number of ignored orthogonal frequency division multiplexing OFDM symbols N _∞ of the user equipment UE is an absolute time alignment TA value of the UE, The absolute TA value of the UE is used by the eNB to determine the _Nm .

14. The method according to claim 12, wherein the means for indicating a user equipment

Ignored UE orthogonal frequency division multiplexing OFDM symbol number information N _∞ is the value of N _∞.

15. The method of claim 14 wherein:

The request message is a media access control (MAC) message, the message carries the MAC control unit CE, the information of the N _∞ CE on the carrier.

16. The method of claim 14 wherein:

The request message is in the physical uplink control channel PUCCH CQI information or channel quality or channel state information CSI transmitted on physical uplink shared channel PUSCH, wherein the information carrier the CQI or CSI, N _∞ on the UE.

17. The method of claim 14 wherein:

The data field of the downlink subframe includes the number of OFDM symbols being N. The number of OFDM symbols that can be used to receive the effective part of the downlink data in the data domain of the downlink subframe is N ₀ -N _m ,

The method further includes:

And receiving, by the eNB, a downlink scheduling message, where the downlink scheduling message indicates that the UE receives downlink data in the valid part of the downlink subframe.

The method according to claim 17, wherein the method further includes: the first downlink scheduling message includes first downlink control information DCI, wherein the first DCI includes first indication information, The first indication information is used to indicate that the UE receives an extended PDCCH channel and/or a reference signal specific to the UE in the valid part of the data domain of the downlink subframe.

The method according to claim 17, wherein the method further comprises: sending a capability configuration message to the eNB, where the capability configuration message includes capability indication information of the UE;

The downlink scheduling message includes a modulation and coding scheme MCS information and a physical resource block PRB information, and the MCS information and/or the PRB information is determined according to the capability indication information of the UE.

20. The method of claim 19, wherein The capability indication information of the UE includes at least one of the following items:

Whether the UE is a low-capability UE,

Whether the UE supports code block segmentation, and

Whether the UE supports high order modulation.

21. The method of claim 20, wherein

The MCS information in the downlink scheduling message includes a resource mapping indication field, where the resource mapping indication field is used to indicate that the UE performs resource mapping by using the valid part of the downlink subframe.

22. A communication method, the method comprising:

The communication method according to claim 22, wherein the capability indication information comprises at least one of the following:

Whether the UE belongs to a low-capability UE,

Whether the UE supports code block segmentation, and

Whether the UE supports high order modulation.

24. A base station, the base station comprising:

An acquiring unit, configured to acquire information of the ignored OFDM symbol number N _∞ of the user equipment UE, where the N _{∞ is} used to indicate a data field of a downlink subframe that is sent by the base station eNB to the UE No data is carried on the N _∞ OFDM symbols of the tail;

The base station according to claim 24, wherein the base station further comprises: the acquiring unit is configured to acquire a time-aligned TA value of the UE, and pass the TA value of the UE according to the A predefined rule determines the N _{∞ of} the UE.

26. The base station of claim 24, wherein

The acquiring unit is specifically configured to receive a request message sent by the UE, where the request message carries the N _∞ .

27. A base station, the base station comprising: a receiving unit, configured to receive a capability configuration message sent by the user equipment UE, where the capability configuration message includes capability indication information of the UE;

28. The base station of claim 27, wherein

The capability information of the UE includes whether the UE is a low capability UE, and/or whether the UE supports code block segmentation, and/or whether the UE supports high order modulation.

29. A user equipment, wherein the user equipment comprises:

a sending unit, configured to send a request message to the base station eNB, where the request message carries information for indicating the number of ignored orthogonal frequency division multiplexing OFDM symbols N _用户 of the user equipment UE, where the N _{∞ is} used to indicate the tail of the data field eNB downlink sub frame to the user equipment transmits data in N _∞ not carrying OFDM symbols;

30. The user equipment of claim 29, wherein

The request message is in the shared or PUCCH physical uplink control channel quality information (CQI) channel or a channel state information CSI transmission on the PUSCH physical uplink channel, wherein the CQI or information carrier on said N _∞ CSI.

A user equipment, wherein the user equipment comprises:

a receiving unit, configured to receive an uplink scheduling grant and/or a downlink scheduling message sent by the eNB, where the uplink scheduling grant and/or the downlink scheduling message includes MCS information and PRB information, and the MCS information and/or the PRB information 4 And determining according to the capability indication information of the UE.

32. The user equipment of claim 31, wherein

The capability indication information of the user equipment includes at least one of the following items: whether the user equipment is a low capability UE,

Whether the UE supports code block segmentation, and

Whether the UE supports high order modulation.