Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W28/00—Network traffic management; Network resource management
  • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
  • H04W28/18—Negotiating wireless communication parameters
  • H04W28/20—Negotiating bandwidth

Definitions

• the present invention relates to the field of wireless communications, and in particular to a method for downlink information transmission (including transmission and reception), a base station, and a user equipment. Background technique
• MTC UE Machine Type Communication User Equipment
• M2M Machine To Machine
• M2M technology has been supported by internationally renowned manufacturers such as NEC, HP, CA, Intel, IBM, AT&T, and mobile operators in various countries.
• the M2M devices currently deployed on the market are mainly based on the GSM (Global System of Mobile communication) system.
• GSM Global System of Mobile communication
• LTE Long Term Evolution
• M2M multi-type data services based on LTE will also be more attractive. Only the cost of the LTE-M2M device can be lower than that of the MTC terminal of the GSM system, and the M2M service can be truly transferred from the GSM to the LTE system.
• the cost of affecting MTC UEs is mainly in baseband processing and radio frequency. Reducing the downlink receiving bandwidth of the UE is a very effective way to reduce the cost of the MTC UE. That is, the maximum supported downlink bandwidth of the MTC UE is smaller than that of the conventional legacy LTE terminal (Ordinary Legacy R8/9/10 UE, OL UE for short), which requires a maximum reception bandwidth of 20 MHz.
• the receiving bandwidth of the MTC UE can be set to a small bandwidth supported by an LTE system such as 1.4 MHz or 3 MHz.
• a physical resource block (PRB) is used as a resource allocation unit.
• a time slot on a PRB corresponds to a time slot, and the width in the frequency domain is 180 kHz.
• the subcarrier spacing is 15 kHz, each PRB contains 12 subcarriers, and one slot contains 7 OFDMA symbols.
• the number of PRBs corresponding to the bandwidth and transmission bandwidth of each channel system is shown in Table 1.
• Transmission Bandwidth Configuration PRB Number 6 15 25 50 100 The specific channel system bandwidth and transmission bandwidth configuration is shown in Figure 1. For example, in the case of a system bandwidth of 5 MHz, the transmission bandwidth occupies 25 PRBs in the central frequency domain, and 0.5 MHz remains on both sides of the channel as the system guard interval.
• the direct current (DC) subcarrier is located at the center frequency position of the system bandwidth. If the system bandwidth contains an even number of PRBs, the DC subcarriers are located exactly between the two PRBs. If the system bandwidth contains an odd number of PRBs, the DC subcarriers pass through the center of the intermediate PRB.
• the DC subcarrier of the MTC UE and the DC sub of the OL UE appear in the frequency domain.
• the carriers cannot be completely coincident.
• the downlink information sent to the MTC UE cannot be correctly received by the MTC UE, and the base station and the MTC UE cannot communicate effectively.
• the technical problem to be solved by the present invention is to provide a downlink information transmission (including transmission and reception) method, a base station and a user equipment to solve the problem of effective communication between the base station and the user equipment.
• the present invention provides a downlink information transmission method, including: determining, by a base station, whether a maximum reception bandwidth supported by a user equipment (UE) is smaller than a current downlink system bandwidth; if the determination is yes, the base station is on the N PRBs. Transmitting the downlink information of the UE, otherwise, the base station transmits the downlink information of the UE on the current downlink system bandwidth, where l ⁇ N ⁇ n+l, n is the PRB corresponding to the maximum receiving bandwidth supported by the UE. Number.
• UE user equipment
• the N PRBs are N PRBs in the frequency domain of the downlink system bandwidth, or N PRBs specified by the signaling.
• the N PRBs corresponding to the process of the user equipment accessing the system are different from the N PRBs corresponding to the non-access system process of the user equipment, or the N PRBs corresponding to the downlink control information and the N PRBs corresponding to the downlink data carried by the physical downlink shared channel. different.
• the PRB division method corresponding to the N PRBs is determined according to the maximum reception bandwidth supported by the UE or the current downlink system bandwidth.
• the PRB division method corresponding to the N PRBs is determined according to the parity of the PRB number corresponding to the maximum reception bandwidth supported by the UE, and/or according to the parity of the PRB number corresponding to the current downlink system bandwidth.
• the number of PRBs corresponding to the current downlink system bandwidth and the parity of the PRB number corresponding to the maximum received bandwidth supported by the UE are different according to the current downlink.
• the parity of the number of PRBs corresponding to the system bandwidth is PRB-divided, the N is n, n+1 or nl.
• the number of PRBs corresponding to the maximum receiving bandwidth supported by the UE is an odd number n1 and an even number n2, respectively, and the maximum downlink system bandwidth supported by the UE is smaller than the current downlink system bandwidth.
• the N is n2;
• the present invention further provides a downlink information transmission method, including: a user equipment (UE) determines whether a maximum reception bandwidth supported by the UE is smaller than a current downlink system bandwidth; if the determination is yes, the UE is in N The downlink information is received on the PRB. Otherwise, the UE receives the downlink information on the current downlink system bandwidth, where l ⁇ N ⁇ n+l, n is the number of PRBs corresponding to the maximum received bandwidth supported by the UE.
• a user equipment UE determines whether a maximum reception bandwidth supported by the UE is smaller than a current downlink system bandwidth; if the determination is yes, the UE is in N The downlink information is received on the PRB. Otherwise, the UE receives the downlink information on the current downlink system bandwidth, where l ⁇ N ⁇ n+l, n is the number of PRBs corresponding to the maximum received bandwidth supported by the UE.
• the N PRBs are N PRBs in the frequency domain of the downlink system bandwidth, or N PRBs specified by the signaling.
• the N PRBs corresponding to the process of the user equipment accessing the system are different from the N PRBs corresponding to the non-access system process of the user equipment, or the N PRBs corresponding to the downlink control information and the N PRBs corresponding to the downlink data carried by the physical downlink shared channel. different.
• the PRB division method corresponding to the N PRBs is determined according to the maximum reception bandwidth supported by the UE or the current downlink system bandwidth.
• the PRB division method corresponding to the N PRBs is determined according to the parity of the PRB number corresponding to the maximum reception bandwidth supported by the UE, and/or according to the parity of the PRB number corresponding to the current downlink system bandwidth.
• the number of PRBs corresponding to the current downlink system bandwidth and the parity of the PRB number corresponding to the maximum received bandwidth supported by the UE are different according to the current downlink.
• the parity of the number of PRBs corresponding to the system bandwidth is PRB-divided, the N is n+1 or n-1.
• the number of PRBs corresponding to the maximum receiving bandwidth supported by the UE is an odd number n1 and an even number n2, respectively, and the maximum downlink system bandwidth supported by the UE is smaller than the current downlink system bandwidth.
• the N is n2;
• the present invention also provides a base station, including:
• a bandwidth judging module configured to determine whether a maximum receiving bandwidth supported by the user equipment (UE) is smaller than a current downlink system bandwidth
• a downlink information sending module configured to send downlink information to the UE, and if it is determined that the maximum receiving bandwidth supported by the UE is smaller than the current downlink system bandwidth, transmitting downlink information of the UE on the N PRBs, otherwise, currently The downlink information of the UE is transmitted on the downlink system bandwidth, where l ⁇ N ⁇ n+1, n is the number of PRBs corresponding to the maximum receiving bandwidth supported by the UE.
• the PRB division method corresponding to the N PRBs is determined according to the parity of the PRB number corresponding to the maximum reception bandwidth supported by the UE, and/or according to the parity of the PRB number corresponding to the current downlink system bandwidth.
• the number of PRBs corresponding to the current downlink system bandwidth is different from the parity of the PRB number corresponding to the maximum received bandwidth supported by the UE, and according to the current Parity of the number of PRBs corresponding to the downlink system bandwidth
• the N is n, n+1 or nl.
• the number of PRBs corresponding to the maximum receiving bandwidth supported by the UE is an odd number n1 and an even number n2, respectively, and the maximum downlink system bandwidth supported by the UE is smaller than the current downlink system bandwidth.
• the N is n2;
• the present invention further provides a user equipment, where the user equipment includes: a bandwidth determining module, configured to determine whether a maximum receiving bandwidth supported by the user equipment is smaller than a current downlink system bandwidth;
• the downlink information receiving module is configured to receive downlink information, and if it is determined that the maximum receiving bandwidth supported by the user equipment is smaller than the current downlink system bandwidth, receive downlink information on the N PRBs, otherwise, receive downlink information on the current downlink system bandwidth.
• l ⁇ N ⁇ n+l , n is the number of PRBs corresponding to the maximum receiving bandwidth supported by the UE.
• the N PRBs are N PRBs in the frequency domain of the downlink system bandwidth, or N PRBs specified by the signaling.
• the N PRBs corresponding to the process of the user equipment accessing the system are different from the N PRBs corresponding to the non-access system process of the user equipment, or the N PRBs corresponding to the downlink control information and the N PRBs corresponding to the downlink data carried by the physical downlink shared channel. different.
• the PRB division method corresponding to the N PRBs is determined according to the parity of the PRB number corresponding to the current downlink system bandwidth, and/or the parity of the PRB number corresponding to the maximum reception bandwidth supported by the UE.
• the number of PRBs corresponding to the current downlink system bandwidth and the parity of the PRB number corresponding to the maximum received bandwidth supported by the UE are different according to the current downlink.
• the parity of the number of PRBs corresponding to the system bandwidth is PRB-divided, the N is n, n+1 or nl.
• the number of PRBs corresponding to the maximum receiving bandwidth supported by the UE is an odd number n1 and an even number n2, respectively, and the maximum downlink system supported by the UE When the system bandwidth is less than the current downlink system bandwidth,
• the N is n2;
• the N is nl.
• the method of the present invention defines a unified resource mapping rule between the base station and the user equipment in a scenario where the system bandwidth and the maximum receiving bandwidth of the user equipment are different, so that effective communication between the base station and the MTC UE is ensured, so that different UEs can share the same channel. Increased resource utilization.
• FIG. 1 is a schematic diagram of system bandwidth and transmission bandwidth configuration in LTE
• FIG. 2 is a schematic diagram of a DC subcarrier frequency offset
• FIG. 3 is a schematic diagram of an embodiment of a downlink information transmission method according to the present invention
• FIG. 4 is a schematic structural diagram of a module of a base station according to the present invention
• FIG. 5 is a schematic diagram of an embodiment of a downlink information transmission method described in the perspective of a user equipment according to the present invention.
• FIG. 6 is a schematic structural diagram of a module of a user equipment according to the present invention.
• FIG. 10 is a schematic diagram of downlink information resources in Application Example 4. Preferred embodiment of the invention
• the downlink information transmission (ie, transmission) method of the present invention is introduced from the perspective of a base station.
• the method includes: Step 301: The base station determines whether the maximum receiving bandwidth supported by the user equipment (UE) is smaller than the current downlink system bandwidth; if yes, step 302 is performed, otherwise step 303 is performed;
• Step 302 The base station transmits the downlink information of the UE on the N PRBs, where 1 ⁇ N ⁇ n + l, where n is the number of PRBs corresponding to the maximum receiving bandwidth supported by the UE;
• the N PRBs may be N PRBs in the frequency domain of the downlink system bandwidth, or N PRBs specified by the signaling.
• the number N of the PRBs specified by the signaling may be: l ⁇ N ⁇ n+l , for example, the receiving bandwidth of the low bandwidth limited UE may be 1 or 2 or 3 or 4 or 6 PRB.
• the N PRBs of each subframe may be represented by different positions and numbers, or different positions, or different numbers.
• the base station transmits the downlink information of the UE on the N PRBs, where N is n, n+1 or n-1, where n is supported by the UE.
• the number of PRBs corresponding to the maximum receiving bandwidth; the frequency domain bandwidth occupied by the downlink information is less than or equal to N.
• the PRB division method corresponding to the N PRBs is determined according to the maximum reception bandwidth supported by the UE or the current downlink system bandwidth.
• the PRB division method corresponding to the N PRBs is determined according to one of the following manners: Method 1:
• the PRB is divided according to the parity of the number of PRBs corresponding to the maximum reception bandwidth supported by the UE.
• the PRB is divided according to the number of PRBs.
• the number of PRBs corresponding to the maximum received bandwidth supported by the UE is even. PRB division.
• the PRB is divided according to the number of PRBs;
• the PRB is divided according to the number of PRBs;
• the PRB is divided according to the number of PRBs;
• the PRB is divided according to the number of PRBs.
• the mode 1 is used.
• n/2 or (nl)/2 or (n+1)/2 PRBs are used as downlink resources for the UE to transmit downlink information.
• the base station obtains n/2 or (n-1)/2 or (n+1)/2 PRBs symmetrically as the downlink resources of the UE to transmit downlink information, centering on the DC subcarriers.
• the PRB is divided according to the parity of the number of PRBs corresponding to the current downlink system bandwidth; that is, when the number of PRBs corresponding to the current downlink system bandwidth is an odd number, the PRB is divided according to the number of PRBs; the number of PRBs corresponding to the current downlink system bandwidth When the even number is used, the PRB is divided according to the number of PRBs.
• the number of PRBs corresponding to the current downlink system bandwidth and the parity of the PRB number corresponding to the maximum received bandwidth supported by the UE are different, and corresponding to the current downlink system bandwidth.
• the parity of the PRB is divided into PRBs, the N is n, n+1 or n-1, where n is the number of PRBs corresponding to the maximum receiving bandwidth supported by the UE;
• the number of PRBs corresponding to the current downlink system bandwidth is different from the parity of the maximum number of PRBs supported by the UE, and corresponding to the current downlink system bandwidth.
• the parity of the number of PRBs is PRB-divided
• the UE takes the DC subcarrier as the center and acquires PRBs of different sizes in the upper and lower sides of the frequency domain. For example, the upper side acquires (nl)/2, and the lower side acquires (n+l)/2 PRBs, or the upper side acquires (n+l)/2, and the lower side acquires (nl)/2 PRBs.
• the position of the DC subcarrier is the position of the center frequency point.
• the PRB division is performed according to the number of PRBs, that is, the DC subcarrier is located in the middle.
• the center of the PRB; PRB is divided according to the number of PRBs, that is, the DC subcarrier is located between the two PRBs.
• the number of PRBs corresponding to the maximum receiving bandwidth supported by the UE is an odd number n1 and an even number n2, respectively, and the maximum supported downlink system bandwidth of the UE is smaller than the current downlink system bandwidth.
• the N When the number of PRBs corresponding to the current downlink system bandwidth is an even number, the N is n2; when the number of PRBs corresponding to the current downlink system bandwidth is an odd number, the N is n1.
• the N PRBs corresponding to the process of the user equipment accessing the system are different from the N PRBs corresponding to the non-access system process of the user equipment, or the N PRBs corresponding to the downlink control information and the N PRBs corresponding to the downlink data carried by the physical downlink shared channel. different.
• the specific difference can be expressed as different positions and numbers, or different positions, or different numbers.
• the downlink resource cost corresponding to the downlink data of the UE is n-1 PRBs
• the DCI (downlink control information) cost is calculated according to the bandwidth of the n PRB systems
• the downlink resource cost corresponding to the downlink data of the UE It is n+1 PRBs
• the DCI overhead is calculated according to the bandwidth of n+1 PRB systems.
• Step 303 The base station transmits downlink information of the UE on a current downlink system bandwidth.
• the method proposed by the embodiment of the present invention is applicable to an LTE UE, and is particularly applicable to an MTC UE.
• the equipment cost based on the LTE terminal can be greatly reduced without affecting the performance of the LTE system.
• it can solve the problem that the bandwidth-constrained MTC terminal realizes bandwidth acquisition, successfully receives downlink data, promotes the evolution of the MTC service from the GSM system to the LTE system, and can improve the original spectrum efficiency.
• the present invention further provides a base station.
• the base station includes: a bandwidth judging module, configured to determine whether a maximum receiving bandwidth supported by the user equipment (UE) is smaller than a current downlink system bandwidth;
• a downlink information sending module configured to send downlink information to the UE, and if it is determined that the maximum receiving bandwidth supported by the UE is smaller than the current downlink system bandwidth, transmitting downlink information of the UE on the N PRBs, otherwise, currently The downlink information of the UE is transmitted on the downlink system bandwidth, where l ⁇ N ⁇ n+1, n is the number of PRBs corresponding to the maximum receiving bandwidth supported by the UE.
• the N PRBs are N PRBs in the frequency domain of the downlink system bandwidth, or N PRBs specified by the signaling.
• the N PRBs corresponding to the process of the user equipment accessing the system are different from the N PRBs corresponding to the non-access system process of the user equipment, or the N PRBs corresponding to the downlink control information and the N PRBs corresponding to the downlink data carried by the physical downlink shared channel. different.
• the PRB division method corresponding to the N PRBs is determined according to the maximum reception bandwidth supported by the UE or the current downlink system bandwidth.
• the method for dividing the PRB corresponding to the N PRBs is determined according to one of the following manners: Mode 1: performing parity according to the number of PRBs corresponding to the maximum receiving bandwidth supported by the UE.
• the PRB is divided according to the number of PRBs;
• the PRB is divided according to the number of PRBs.
• the PRB is divided according to the number of PRBs;
• the PRB is divided according to the number of PRBs.
• the number of PRBs corresponding to the current downlink system bandwidth is different from the parity of the maximum number of PRBs supported by the UE, and according to the current downlink system.
• the parity of the number of PRBs corresponding to the bandwidth is PRB-divided, the N is n, n+1, or nl.
• the number of PRBs corresponding to the maximum receiving bandwidth supported by the UE is an odd number n1 and an even number n2, respectively, and the maximum supported downlink system bandwidth of the UE is smaller than the current downlink system bandwidth.
• the N When the number of PRBs corresponding to the current downlink system bandwidth is an even number, the N is n2; when the number of PRBs corresponding to the current downlink system bandwidth is an odd number, the N is n1.
• the following describes the downlink information receiving method of the present invention from the perspective of the user equipment. As shown in FIG. 5, the method includes:
• Step 501 The user equipment (UE) determines whether the maximum received bandwidth is less than the current downlink system bandwidth; if yes, go to step 502, otherwise go to step 503;
• Step 502 The UE receives downlink information on the N PRBs, where l ⁇ N ⁇ n+l, n is the number of PRBs corresponding to the maximum receiving bandwidth supported by the UE;
• the N PRBs are N PRBs in the frequency domain of the downlink system bandwidth, or N PRBs specified by the signaling.
• the N PRBs corresponding to the process of the user equipment accessing the system are different from the N PRBs corresponding to the non-access system process of the user equipment, or the N PRBs corresponding to the downlink control information and the N PRBs corresponding to the downlink data carried by the physical downlink shared channel. different.
• the PRB division method corresponding to the N PRBs is determined according to the maximum reception bandwidth supported by the UE or the current downlink system bandwidth.
• the PRB division method corresponding to the N PRBs is determined according to one of the following manners: Method 1:
• the PRB is divided according to the parity of the number of PRBs corresponding to the maximum reception bandwidth supported by the UE.
• the PRB is divided according to the number of PRBs;
• the PRB is divided according to the number of PRBs.
• the PRB is divided according to the number of PRBs;
• the PRB is divided according to the number of PRBs.
• the PRB is divided according to the parity of the number of PRBs corresponding to the current downlink system bandwidth; when the maximum downlink system bandwidth supported by the UE is smaller than the current downlink system bandwidth, the number of PRBs corresponding to the current downlink system bandwidth and the maximum supported by the UE
• the N is n+1 or nl.
• the number of PRBs corresponding to the maximum receiving bandwidth supported by the UE is an odd number n1 and an even number n2, respectively, and the maximum downlink system bandwidth supported by the UE is smaller than the current downlink system bandwidth.
• the N is n2;
• Step 503 The UE receives downlink information on a current downlink system bandwidth.
• the present invention further provides a user equipment.
• the user equipment includes:
• a bandwidth judging module configured to determine whether a maximum receiving bandwidth supported by the bandwidth is smaller than a current downlink system bandwidth
• a downlink information receiving module configured to receive downlink information, and if it is determined that the maximum received bandwidth supported by the downlink system is smaller than the current downlink system bandwidth, the downlink information is received on the N PRBs. Otherwise, at the current The downlink information is received on the downlink system bandwidth, where l ⁇ N ⁇ n+l , n is the number of PRBs corresponding to the maximum receiving bandwidth supported by the UE.
• the N PRBs are N PRBs in the frequency domain of the downlink system bandwidth, or N PRBs specified by the signaling.
• the N PRBs corresponding to the process of the user equipment accessing the system are different from the N PRBs corresponding to the non-access system process of the user equipment, or the N PRBs corresponding to the downlink control information and the N PRBs corresponding to the downlink data carried by the physical downlink shared channel. different.
• the PRB division method corresponding to the N PRBs is determined according to the maximum reception bandwidth supported by the UE or the current downlink system bandwidth.
• the PRB division method corresponding to the N PRBs is determined according to one of the following manners: Mode 1: The PRB division is performed according to the parity of the PRB number corresponding to the maximum reception bandwidth supported by the UE.
• the PRB is divided according to the number of PRBs;
• the PRB is divided according to the number of PRBs.
• the PRB is divided according to the number of PRBs;
• the PRB is divided according to the number of PRBs.
• the PRB is divided according to the parity of the number of PRBs corresponding to the current downlink system bandwidth; when the maximum downlink system bandwidth supported by the UE is smaller than the current downlink system bandwidth, the number of PRBs corresponding to the current downlink system bandwidth and the maximum supported by the UE When the parity of the number of PRBs corresponding to the received bandwidth is different, and the PRB is divided according to the parity of the number of PRBs corresponding to the current downlink system bandwidth, the N is n, n+1 or nl.
• Maximum receiving bandwidth supported by the UE when the UE supports two types of maximum receiving bandwidths The number of corresponding PRBs is an odd number nl and an even number n2, respectively, and when the maximum downlink system bandwidth supported by the UE is smaller than the current downlink system bandwidth,
• the N is n2;
• the N is nl.
• This application example describes a case where the downlink system bandwidth is 5 MHz, and the MTC UE's reception maximum bandwidth is 1.4 MHz, and 6 PRBs are described.
• the MTC UE uses the second mode to implement downlink information transmission, that is, PRB division according to the parity of the PRB number corresponding to the current downlink system bandwidth.
• the MTC UE After reading the system bandwidth in the PBCH (Physical Broadcast Channel), the MTC UE first compares the system bandwidth with the maximum received bandwidth supported by the MTC UE. Here, it is obviously greater than the number of PRBs corresponding to the system bandwidth. The maximum number of PRBs corresponding to the maximum received bandwidth supported by the MTC UE is an even number. The MTC UE then detects the received downlink information on the downlink resources defined below. Specifically, as shown in Figure 7:
• the MSC UE and the OL UE's PSS/SSS/PBCH can share the same channel.
• the UE detects the received CRS and other downlink control and traffic channels on six consecutive PRBs in the system bandwidth center frequency domain.
• This application example describes a case where the system bandwidth is 3 MHz, the reception bandwidth of the MTC UE is 1.4 MHz, and 6 PRBs.
• the MTC UE uses the second mode to implement downlink information transmission, that is, performs PRB division according to the parity of the number of PRBs corresponding to the current downlink system bandwidth.
• the MTC UE first compares the system bandwidth with the maximum received bandwidth supported by the MTC UE.
• it is obviously greater than the number of PRBs corresponding to the system bandwidth, and the maximum supported by the MTC UE.
• the number of received bandwidth corresponding PRBs is even.
• the MTC UE detects the received downlink information on the downlink resources defined below:
• the low-cost limited UE and the OL UE have the same PRB, and can share the same channel (including the PDSCH, ePDCCH, etc.).
• the UE detects and receives CRS and other downlink control and traffic channels on five consecutive PRBs in the system bandwidth center frequency domain.
• This application example describes a case where the system bandwidth is 3 MHz and the reception bandwidth of the MTC UE is 1.4 MHz and 6 PRBs.
• the MTC UE uses the second mode to implement downlink information transmission, that is, PRB division according to the parity of the PRB number corresponding to the current downlink system bandwidth.
• the MTC UE After reading the system bandwidth in the PBCH, the MTC UE first compares the system bandwidth with the maximum received bandwidth supported by the MTC UE. Here, it is obviously greater than the number of PRBs corresponding to the system bandwidth, and the maximum supported by the MTC UE. The number of PRBs corresponding to the receiving bandwidth is an even number. The MTC UE then detects the received downlink information on the downlink resources defined below:
• the downlink information is received on the downlink resource of 1.26 MHz, where the frequency domain bandwidth occupied by the downlink information is less than or equal to N.
• the MTC UE with low cost bandwidth is centered on the DC subcarrier, and the upper and lower sides respectively obtain 3.5.
• the UE with limited cost bandwidth has the same PRB corresponding to the OL UE, and can share the same channel.
• the UE detects and receives CRS and other downlink control and traffic channels on seven consecutive PRBs in the system bandwidth center frequency domain.
• Application example 4 This application example describes a case where the system bandwidth is 5 MHz, and the reception bandwidth of the MTC UE is 1.4 MHz, and 6 PRBs are described.
• the MTC UE uses the second mode to implement downlink information transmission, that is, performs PRB division according to the parity of the number of PRBs corresponding to the current downlink system bandwidth.
• the MTC UE After reading the system bandwidth in the PBCH, the MTC UE first compares the system bandwidth with the maximum received bandwidth supported by the MTC UE. Here, it is obviously greater than the number of PRBs corresponding to the system bandwidth, and the maximum supported by the MTC UE. The number of PRBs corresponding to the receiving bandwidth is an even number. The MTC UE then detects the received downlink information on the downlink resources defined below:
• the total number of PRBs is still six, but the upper and lower sides respectively obtain unequal frequency domain resources. For example, 2.5 PRBs are obtained above, 450 kHz, and 3.5 PRBs, 630 kHz are obtained below. Then define different guard bands on both sides of the system bandwidth.
• the UE with low cost bandwidth limitation has the same PRB corresponding to the OL UE, and can share the same channel.
• the UE detects and receives CRS and other downlink control and traffic channels on six consecutive PRBs in the system bandwidth center frequency domain.
• This application example describes the case where the system bandwidth is 10 MHz and the reception bandwidth of the MTC UE is 1.4 MHz at 6 RBs.
• the number of PRBs corresponding to the current downlink system bandwidth is the same as the parity of the number of PRBs corresponding to the maximum received bandwidth supported by the MTC UE, and may be considered as performing PRB according to the parity of the PRB number corresponding to the current downlink system bandwidth.
• the division may also be considered as performing PRB division according to the parity of the number of PRBs corresponding to the maximum reception bandwidth supported by the MTC UE.
• the MTC UE After reading the system bandwidth in the PBCH, the MTC UE first compares the system bandwidth with the maximum received bandwidth supported by the MTC UE. Here, it is obviously greater than the number of PRBs corresponding to the system bandwidth, and the maximum supported by the MTC UE. The number of received bandwidth corresponding PRBs is also an even number. The MTC UE detects the received downlink information on the downlink resources of the six PRBs corresponding to the maximum received bandwidth. At this time, the low-cost bandwidth-limited UE has the same PRB corresponding to the OL UE, and can share the same channel.
• the UE detects and receives CRS and other downlink control and traffic channels on six consecutive PRBs in the system bandwidth center frequency domain.
• This application example describes the case where the reception bandwidth of the MTC UE is 1.4 MHz or 3 MHz, 6 RBs or 15 RBs.
• the maximum downlink system bandwidth supported by the UE is smaller than the current downlink system bandwidth
• the N is 6;
• the N is 15.
• the system bandwidth is 10MHz or 5MHz, and the system bandwidth corresponds to a number of PRBs of 50 or 25.
• the MTC UE After reading the system bandwidth in the PBCH, the MTC UE first compares the system bandwidth with the maximum received bandwidth supported by the MTC UE. Here, it is obviously greater than the number of PRBs corresponding to the system bandwidth 10 MHz, and the MTC UE is in its The downlink information is detected on the downlink resources of the six PRBs corresponding to the supported receiving bandwidth.
• the MTC UE After reading the system bandwidth in the PBCH, the MTC UE first compares the system bandwidth with the maximum received bandwidth supported by itself. Here, it is obviously greater than the number of PRBs corresponding to the system bandwidth of 5 MHz, and the MTC UE is in its The downlink information is detected on the downlink resources of the 15 PRBs corresponding to the supported receiving bandwidth.
• the number of PRBs corresponding to the current downlink system bandwidth is the same as the parity of the number of PRBs corresponding to the maximum received bandwidth supported by the MTC UE, and may be considered as the parity of the number of PRBs corresponding to the current downlink system bandwidth.
• the PRB division may also be considered as a PRB division according to the parity of the number of PRBs corresponding to the maximum reception bandwidth supported by the MTC UE;
• the UE with low cost bandwidth limitation has the same PRB corresponding to the OL UE, and can share the same channel.
• the UE detects the received CRS and other downlink control and traffic channels on consecutive 6 or 15 PRBs in the system bandwidth center frequency domain.
• the foregoing application example is described by using the MTC UE as an example.
• the method for receiving the downlink physical channel and the bandwidth acquisition method can be applied to other scenarios, and is applied to other types of UEs, and is not limited to the MTC UE.
• the method, the base station, and the user equipment of the present invention define a unified resource mapping rule between the base station and the user equipment in a scenario where the system bandwidth and the maximum receiving bandwidth of the user equipment are different, thereby ensuring effective communication between the base station and the MTC UE, so that different The UE can share the same channel and improve resource utilization.
• the present invention proposes a low-bandwidth limited MTC UE downlink system bandwidth acquisition method, and according to this configuration, the small bandwidth MTC UE can successfully acquire the CRS, and can smoothly demodulate the downlink control.
• the service information which promotes the evolution of the MTC service from the GSM system to the LTE system, seamlessly integrates into the LTE network, and promotes the rapid evolution of the M2M service from the GSM system to the LTE system, and can improve the original spectrum efficiency.
• the method of the present invention defines a unified resource mapping rule between a base station and a user equipment in a scenario where the system bandwidth and the maximum receiving bandwidth of the user equipment are different, so that effective communication between the base station and the MTC UE is ensured, so that different UEs can be shared.
• the same channel improves resource utilization.

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• 2012
  • 2012-05-16 CN CN2012101520485A patent/CN103428859A/zh active Pending
• 2013
  • 2013-04-27 WO PCT/CN2013/074861 patent/WO2013170699A1/fr not_active Ceased

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