Matching subcarrier power in a broadband network collocated with a narrowband network

A transmitter/receiver (BSBB;

• MSBB) configured for location in a given cell (CBB,nc) of a first cellular wireless communication network (RBB) in order to adapt the transmission powers of subcarriers (fBB) as a function of the transmission powers of carriers (fNB) in a second cellular wireless communication network (RNB), the first and second networks having in common cells (CNB,nc) each having, collocated, a first base station (BSBB) with several directional sectors of the first network and a second omnidirectional base station (BSNB) of the second network and a wide frequency band (ΔFL;
• ΔFUL) including the subcarriers (fBB) allocated to the sectors of the first base stations (BSBB) and the groups (GfNB,nc) of carriers (fNB) allocated respectively to the second base stations (BSNB) in a cellular pattern of re-use (MCNB) of the second network having several concentric levels of cell location (L0 to LI-1), the transmitter/receiver (BSBB;
• MSBB comprising:
• means (IRns) for attenuating by an attenuation parameter (αi) a predetermined power (PNB) of each subcarrier fBB) which is to be transmitted in a specified sector (Sns) of the given cell (CBB,nc) and which is adjacent to a carrier (fNB) belonging to one of the groups allocated to second base stations (BSNB) in preselected cells (CNB,i) in the specified sector (Sns) and on levels (L0 to LI-1) starting from the given cell (CBB,nc) below a predetermined high level (LI), the attenuation parameter being all the more low as the respective level (Li) is close to the given cell, and
• means (IRns) for transmitting the subcarriers (fBB) in the specified sector (Sns) with the predetermined transmission power (PNB) other than said adjacent subcarriers.

A broadband wireless communication network (RBB) comprising,

• a plurality of base stations (BSBB) in a first network, with a plurality of directional sectors as transmitter/receivers, the transmitter/receivers being configured to transmit subcarriers (fBB) disposed in a frequency band (ΔFDL) dedicated to downlinks and having transmission powers to adapt to the transmission powers of carriers (fNB) included in the frequency band (ΔFDL) dedicated to the downlinks and capable of being transmitted by omnidirectional base stations (BSNB) in a narrowband wireless communication network (RNB);
• a plurality of mobile devices (MSBB) in a second network collocated with the broadband network, the mobile devices (MSBB) acting as transmitter/receivers configured to transmit other subcarriers (fBB) disposed within in a frequency band (ΔFUL) dedicated to uplinks and having transmission powers to adapt to the transmission powers of other carriers (fNB) included in the frequency band (ΔFUL) dedicated to the uplinks and capable of being transmitted by mobiles (MSNB) in the narrowband network, each of the transmitter/receivers comprising:
• means (IRns) for attenuating by an attenuation parameter (αi) a predetermined power (PNB) of each subcarrier fBB) which is to be transmitted in a specified sector (Sns) of the given cell (CBB,nc) and which is adjacent to a carrier (fNB) belonging to one of the groups allocated to second base stations (BSNB) in preselected cells (CNB,i) in the specified sector (Sns) and on levels (L0 to LI-1) starting from the given cell (CBB,nc) below a predetermined high level (LI), the attenuation parameter being all the more low as the respective level (Li) is close to the given cell, and
• means (IRns) for transmitting the subcarriers (fBB) in the specified sector (Sns) with the predetermined transmission power (PNB) other than said adjacent subcarriers.

A transmitter/receiver (BSBB;

• MSBB) capable of being located in a given cell (CBB,nc) of a first cellular wireless communication network (RBB) in order to adapt the transmission powers of subcarriers (fBB) as a function of the transmission power of carriers (fNB) in a second cellular wireless communication network (RNB), the first and second networks having in common cells (CNB,nc) each having, collocated, a first base station (BSBB) with several directional sectors of the first network and a second omnidirectional base station (BSNB) of the second network and a wide frequency band (ΔFDL;
• ΔFUL) including the subcarriers (fBB) allocated to the sectors of the first base stations (BSBB) and the groups (GfNB,c) of carriers (fNB) allocated respectively to the second base stations (BSNB) in a cellular pattern of re-use (MCNB) of the second network having several concentric levels of cell location (L0 to LI-1), the transmitter/receiver (BSBB;
• MSBB) comprising:
• means (UGP) for classifying carriers of groups allocated to second base stations (BSNB,i) of preselected cells in a specified sector (Sns) of the given cell (CBB,nc) and on levels (L0 to LI-1) starting from the given cell below a predetermined high level (LI), into classes (CPi) associated respectively with the levels (L0 to LI-1), with the attenuation parameters (α0 to αI-1) and with thresholds (TH0 to THI-1) which are all the more low as the associated levels are distanced from the given cell, the carriers in a class (CPi) having reception powers (PRNB) at a point (MSBB;
• BSBB) situated in the given cell (CBB,nc) and in the specified sector (Sns) comprised between the threshold (THi) associated with the class and the preceding threshold (THi-1), and
• means (IRns) for attenuating by an attenuation parameter (αi) a predetermined power (PNB) for each subcarrier (fBB) which is to be transmitted when the subcarrier is adjacent to a carrier (fNB) belonging to the class (CPi) associated with the attenuation parameter (αi), and a means (IRns) for transmitting the subcarriers (fBB) in the specified sector (Sns) with the predetermined transmission power (PNB) other than said adjacent subcarriers.

A broadband wireless communication network (RBB) comprising,

• a plurality of base stations (BSBB), in a first network, with several directional sectors as transmitter/receivers configured to transmit subcarriers (fBB) disposed in a frequency band (ΔFDL) dedicated to downlinks and having transmission powers to adapt to transmission powers of carriers (fNB) included in the frequency band (ΔFDL) dedicated to the downlinks and capable of being transmitted by omnidirectional base stations (BSNB) in a narrowband wireless communication network (RNB);
• a plurality of mobile devices (MSBB) in a second network collocated with the broadband network, the mobile devices (MSBB) acting as transmitter/receivers configured to transmit other subcarriers (fBB) disposed in a frequency band (ΔFUL) dedicated to uplinks and having transmission powers to adapt to transmission powers of other carriers (fNB) included in the frequency band (ΔFUL) dedicated to the uplinks and capable of being transmitted by mobiles (MSNB) in the narrowband network, each of the transmitter/receivers comprising:
• means (UGP) for classifying carriers of groups allocated to second base stations (BSNB,i) of preselected cells in a specified sector (Sns) of the given cell (CBB,nc) and on levels (L0 to LI-1) starting from the given cell below a predetermined high level (LI), into classes (CPi) associated respectively with the levels (L0 to LI-1), with the attenuation parameters (α0 to αI-1) and with thresholds (TH0 to THI-1) which are all the more low as the associated levels are distanced from the given cell, the carriers in a class (CPi) having reception powers (PRNB) at a point (MSBB;
• BSBB) situated in the given cell (CBB,nc) and in the specified sector (Sns) comprised between the threshold (THi) associated with the class and the preceding threshold (THi-1), and
• means (IRns) for attenuating by an attenuation parameter (αi) a predetermined power (PNB) for each subcarrier (fBB) which is to be transmitted when the subcarrier is adjacent to a carrier (fNB) belonging to the class (CPi) associated with the attenuation parameter (αi), and a means (IRns) for transmitting the subcarriers (fBB) in the specified sector (Sns) with the predetermined transmission power (PNB) other than said adjacent subcarriers.

A computer program product disposed in a computer readable storage medium, the computer readable storage medium being implemented in a transmitter/receiver (BSBB;

• MSBB) said program product being characterised in that it comprises instructions which, when executed in the transmitter/receiver (BSBB;
• MSBB), performs the steps of:
• attenuating by an attenuation parameter (αi) a predetermined power (PNB) for each subcarrier (fBB) which is to be transmitted by a transmitter/receiver (BSBB;
• MSBB) of a first network (RBB) located in a given cell (CBB,nc) and in a specified sector (Sns) of the given cell (CBB,nc) and which is adjacent to a carrier (fNB) belonging to a group allocated to a plurality of second base stations (BSNB) in preselected cells (CNB,i) in the specified sector (Sns) and on levels (L0 to LI-1) starting from the given cell (CBB,nc) below a predetermined high level (LI), the attenuation parameter being all the more low as the respective level (Li) is close to the given cell, and
• transmitting the subcarriers (fBB) other than said adjacent subcarrier with the predetermined transmission power (PNB) in the specified sector (Sns) by the transmitter/receiver (BSBB;
• MSBB.